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Sample records for students aged 12-13

  1. The Effect of Gender on Sprint Performance of 10-13 Aged Middle School Students

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    Serhat Turan

    2016-04-01

    Full Text Available The aim of the study was to investigate the effect of gender on the 30 m sprint performance of middle school students (10-13 ages. The study included 25 male and 25 female total 50 middle school students. The mean age of female students was found as 12,36 ± 0,48 (year, the mean body weight as 42,03 ± 3,63 (kg, and the mean height as 151,11 ±5,61 (cm, and the mean age of male students was found as 12,28 ± 0,45 (year, the mean height as 152,28 ± 5,04 (cm, and the mean body weight as 43,35 ± 1,88 (kg. The mean sprint performance of female students was calculated as 6,33 ± 0,53 seconds, and the mean sprint performance of the male students was 6,17 ± 0,47 seconds. As a result the effect of gender on sprint performance was found to be insignificant between the groups (p>0,05.

  2. Prevalence of obesity among students aged 6 to 12 in China: a meta-analysis

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    Yue Tian

    2015-12-01

    Full Text Available Background: In recent years, obesity has become a major public health problem worldwide. It has been estimated that 8% of children are obese. This study evaluates the overall prevalence of obesity in primary students in recent years. Methods: Publications from 2011 and 2015 on the obesity prevalence among primary school students aged 6 to 12 in China were retrieved from the databases PubMed and Wanfang Data. Obesity was defined using the International Obesity Task Force standard body mass index cutoff points established for children. MetaAnalyst 3.13 software was used to calculate the total prevalence of obesity among primary school students in recent years. Results: After evaluation of the quality of the articles, 14 papers were finally included in our study. The pooled prevalence of obesity in students aged 6 to 12 is 10.2% (95% CI: 7.1–14.6%. Conclusion: Our results indicate that obesity is prevalent in students aged 6 to 12 in China. We believe that appropriate measures should be taken to control this situation.

  3. Prevalence and risk factors of anxiety status among students aged 13-26 years

    OpenAIRE

    Jin, Yuelong; He, Lianping; Kang, Yaowen; Chen, Yan; Lu, Wei; Ren, Xiaohua; Song, Xiuli; Wang, Linghong; Nie, Zhonghua; Guo, Daoxia; Yao, Yingshui

    2014-01-01

    Previous study revealed that 8%-12% adolescents suffered from various types of anxiety disorders, and which had interfered with adolescent daily life function and affected adolescent social function. The aim of this study was to evaluate anxiety status and its related factors among students aged 13-26 years from Wuhu, China. This was a cross-sectional observational study. A sample of school students who come from a university, four high schools and four middle schools in Wuhu city were recrui...

  4. Less Interested after Lessons? Report on a Small-Scale Research Study into 12- to 13-Year-Old Students' Attitudes to Earth Science

    Science.gov (United States)

    Hetherington, Lindsay

    2010-01-01

    Results of a small-scale research study conducted with year 8 (ages 12-13) students suggest that although these students have generally positive attitudes towards earth science, girls tend to be less interested in it than boys. Interest in earth science was found to separate into two dominant factors, labelled "scientific" and…

  5. Prevalence of Dental Caries in 5 – 6 Years and 1213 Years Age Group of School Children of Kathmandu Valley

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    B Subedi

    2011-12-01

    Full Text Available Introduction: Dental caries is one of the most common conditions affecting the general health of children. The present study was carried out among school children of Kathmandu valley to determine the prevalence of dental caries in two age groups. Methods: The study was conducted from December 2007 to May 2008. The age of the school children of the study was divided into two group: 5 - 6 years and 12 - 13 years. A stratifi ed cluster sampling with proportional allocation was used while grouping the subjects. The dental status examination was done with the help of trained dentists. Decayed, missed and fi lled teeth index and decayed, missed and fi lled surfaces index (dmft for primary dentition and DMFT for permanent dentition were used as the standard tools for the determination of prevalence. Results: A total of 638 students (325 of age group 12 - 13 years and 313 of age group 5 - 6 years from 30 different schools of the Kathmandu valley were included in the study. The caries status was found higher in the age group of 5 - 6 years than in the 12 - 13 years and it was found to be statistically signifi cant (p < 0.001. The dmfs and caries percentage of the age group 5 - 6 years and the DMFS and caries percent of the 12 - 13 years was found to be 3.79, 69 % and 1.6, 53.23 % respectively. The dmft/dmfs value was found to be signifi cant according to the districts in the 5 - 6 years age group whereas the DMFS was found statistically signifi cant among the sexes of the 12 - 13 years age group. Conclusions: The caries percentage was found to be above the recommended level of the World Health Organization. However, the DMFS and DMFT values were within the WHO level. Keywords: Children, dental caries, DMF index.

  6. Effects of Swimming Training on Stress Levels of the Students Aged 11-13

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    Köroglu, Mihraç; Yigiter, Korkmaz

    2016-01-01

    The purpose of this research was to determine the effects of the swimming training program on stress levels of the students ages 11-13. To this end, 60 students from Private Sahin School in the Sakarya city participated in the study voluntarily. 60 students were divided into two groups and each group was included 30 students. Stress Level Scale II…

  7. Occlusal caries risk assessment using Cariogram analysis in student aged 11-12 years

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    Riana Wardani

    2017-03-01

    Full Text Available ABSTRACT   Introduction: Basic Health Research 2013 showed Dental Caries Index in school age student in West Java was lower than the expected target, with occlusal surface as most affected part. The purpose of this study was to determine the risk status of dental caries in school age student by using cariogram analysis. Methods: Observational research. Study was conducted on 30 student aged 11-12 years with caries high risk on occlusal surfaces. Purposive sampling was taken from students of SDN Cikawari and SDN Mekarjaya Bandung Regency with high DMF-S index. Inclusion criteria: male and female, aged 11-12 years, good systemic health, SDN Mekarjaya and SDN Cikawari Bandung Regency students. Exclusion criteria: suffering from systemic disorder, currently in long-term antibiotic therapy, orthodontic appliance usage. Case history, eating habits and intake of fluoride, caries experience, salivary volume and buffering capacity of each sample was examined using cariogram examination method. Results: The cariogram analysis showed 43% chance of caries avoidance. Diet control was 23.3%, includes two factors: sugary foods and eating frequency. Bacteria control was 11.9% by evaluating both bacterial factors (the amount of plaque and the bacteria Streptococcus mutans. Vulnerability control was 14.4%, including caries prevention by the continuation of fluorine program and other conditions control that affect salivary secretions. Conclusion: Based on cariogram analysis found that all samples who had occlusal surfaces caries were at a high risk category, but still having moderate potential of avoiding new caries occurrence by controlling risk factors. Keywords: Cariogram analysis, Occlusal caries, Aged 11-12 years

  8. Transmission electron microscopy of Ti-12Mo-13Nb Alloy aged after heat forging

    International Nuclear Information System (INIS)

    Oliveira, Nathalia Rodrigues; Baldan, Renato; Gabriel, Sinara Borborema

    2014-01-01

    Metastable β-Ti alloys possess mechanical properties, in particular a elastic modulus that depends not only on its composition but also the applied thermomechanical treatments. These alloys require high mechanical strength and a low Young’s modulus to avoid stress shielding. Preliminary studies on the development of Ti- 13Nb-12Mo alloy showed than the better properties were obtained at aged at 500 ° C / 24 h after cold forging , whose microstructure consisted of bimodal α phase in the β matrix. In this work, Ti-12Mo-13Nb alloy was heat forged and aged at 500 deg C for 24h and the microstructure was analyzed by employing X-ray diffraction and transmission electron microscopy. According to the results, while the cold forging resulted in bimodal α phase in the β matrix, hot forging resulted in a fine and homogeneous α phase in the β matrix. (author)

  9. Prevalence of and susceptibility to cigarette smoking among female students aged 13 to 15 years in Vietnam, 2007.

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    Minh, Hoang Van; Hai, Phan Thi; Giang, Kim Bao; Kinh, Ly Ngoc

    2010-01-01

    Recent reports show a sharp increase in smoking rates among girls. We describe prevalence of cigarette smoking and susceptibility to cigarette smoking among female students aged 13 to 15 years in Vietnam and examine the associated factors. We used data from female secondary school students aged 13 to 15 years (grades 8-10) from the 2007 Global Youth Tobacco Survey that was conducted in 9 provinces in Vietnam. We used multivariate logistic regression analysis to determine associations between independent variables with smoking status and susceptibility to smoking. Prevalence of cigarette smoking among girls was 1.2% (95% confidence interval [CI], 0.9-1.5), and 1.5% (95% CI, 1.2-1.9) of girls were susceptible to smoking. Having friends who smoke was the strongest predictor of both smoking status and susceptibility to smoking. Attendance at school classes that described the harmful effects of smoking had significant effects in reducing cigarette smoking. Girls who were exposed to billboard cigarette advertising were more likely to be susceptible to smoking than were those who had not seen advertisements. Our findings highlight the need for pursuing school-based intervention programs in Vietnam and for countering tobacco advertising and marketing practices that target young women.

  10. Determinants of Personality Traits of School-Age Children : Evidence from Japanese Students at Age 12

    OpenAIRE

    Hojo, Masakazu

    2017-01-01

    It has been widely recognized among economists that non-cognitive ability, such as self-control, self-esteem, and personality traits, has a great power in predicting social and economic success. Using survey data from students at age 12 and their parents living in Japan, this paper explores the determinants of personality traits of school-age children. Personality traits are measured by students’ answers for questions concerning daily and school life, and we constructed five measures of perso...

  11. Correlation between the 12C+12C, 12C+13C, and 13C+13C fusion cross sections

    Science.gov (United States)

    Notani, M.; Esbensen, H.; Fang, X.; Bucher, B.; Davies, P.; Jiang, C. L.; Lamm, L.; Lin, C. J.; Ma, C.; Martin, E.; Rehm, K. E.; Tan, W. P.; Thomas, S.; Tang, X. D.; Brown, E.

    2012-01-01

    The fusion cross section for 12C+13C has been measured down to Ec.m.=2.6 MeV, at which the cross section is of the order of 20 nb. By comparing the cross sections for the three carbon isotope systems, 12C+12C, 12C+13C, and 13C+13C, it is found that the cross sections for 12C+13C and 13C+13C provide an upper limit for the fusion cross section of 12C+12C over a wide energy range. After calibrating the effective nuclear potential for 12C+12C using the 12C+13C and 13C+13C fusion cross sections, it is found that a coupled-channels calculation with the ingoing wave boundary condition (IWBC) is capable of predicting the major peak cross sections in 12C+12C. A qualitative explanation for this upper limit is provided by the Nogami-Imanishi model and by level density differences among the compound nuclei. It is found that the strong resonance found at 2.14 MeV in 12C+12C exceeds this upper limit by a factor of more than 20. The preliminary result from the most recent measurement shows a much smaller cross section at this energy, which agrees with our predicted upper limit.

  12. Mechanical characterization of Ti-12Mo-13Nb alloy for biomedical application hot swaged and aged

    Energy Technology Data Exchange (ETDEWEB)

    Gabriel, Sinara Borborema; Rezende, Monica Castro; Almeida, Luiz Henrique de, E-mail: sinara@metalmat.ufrj.br [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil). Departamento de Engenharia Metalurgica e de Materiais; Dille, Jean [Universite Libre de Bruxelles, Brussels (Belgium); Mei, Paulo [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Departamento de Engenharia Mecanica; Baldan, Renato; Nunes, Carlos Angelo [Universidade de Sao Paulo (USP), Lorena, SP (Brazil). Departamento de Engenharia de Materiais

    2015-07-01

    Beta titanium alloys were developed for biomedical applications due to the combination of its mechanical properties including low elasticity modulus, high strength, fatigue resistance, good ductility and with excellent corrosion resistance. With this perspective a metastable beta titanium alloy Ti-12Mo-13Nb was developed with the replacement of both vanadium and aluminum from the traditional alloy Ti-6Al-4V. This paper presents the microstructure, mechanical properties of the Ti-12Mo-13Nb hot swaged and aged at 500 deg C for 24 h under high vacuum and then water quenched. The alloy structure was characterized by X-ray diffraction and transmission electron microscopy. Tensile tests were carried out at room temperature. The results show a microstructure consisting of a fine dispersed α phase in a β matrix and good mechanical properties including low elastic modulus. The results indicate that Ti-12Mo-13Nb alloy can be a promising alternative for biomedical application. (author)

  13. Adult anthropometric measures and socio-demographic factors influencing age at menarche of university students in malaysia.

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    Hossain, Md Golam; Wee, Ai-Sze; Ashaie, Maeirah; Kamarul, T

    2013-09-01

    Early onset of menarche has been shown to be associated with breast cancer and ischaemic heart disease. Studies on age at menarche of the Malaysian population are poorly documented. This study aimed to determine the influence of anthropometric and socio-demographic factors on the age at menarche of university students in Malaysia. Data were obtained in 2010-11 from 961 students between the ages of 18 and 25 years from the University of Malaya using stratified sampling, and multiple regression analysis was applied. Sixty-three per cent of students reached menarche at the age of 12 or 13 years, with the mean and median of age at menarche being 12.45 ± 1.17 and 12.01 years, respectively. Menarcheal age was positively associated with height (pObese and overweight students reached menarche earlier than students who were underweight or of normal weight (p<0.01). The variations in age at menarche among the Malaysian ethnic groups were statistically insignificant. The results suggest that heavier and first-born students from small families are more likely to attain menarche earlier than their counterparts.

  14. Sports injuries in students aged 12-18 during physical education classes in Israel

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    Coleman R

    2003-12-01

    Full Text Available A retrospective study was made of sports injuries occurring in physical education classes in 51 junior and senior high schools in Israel during a period of 14 months (2000-2002. The survey covered a total population of 11439 students aged 12 to 18, 52% male, 48% female. The aim of the study was to assess the incidence, types and risk factors involving sports injuries among students in physical education classes. Physical education teachers were asked to complete questionnaires recording injuries that occurred during their lessons. Data included: socio-demographic parameters (gender, age, height and weight of the injured students, area and type of injury, time of injury during the class, type of sport activity, previous injuries, assessment of sport capabilities and performance. A total of 192 injuries were recorded in the survey (1.70%. Male and female students had fairly similar injury rates (49% female, 51% male. 12-14 year old students showed the greatest number of injuries (52%. The ankle was the most common site of injury in both genders (48% mostly involving ankle sprain. Athletics was the most common sport involving injury (38%. 45% of injuries were reported to occur in the start of the class, whereas 26% of injuries were repeat injuries. This survey showed that the incidence of injuries during supervised physical education classes in high schools in Israel is relatively low and is similar to that of other Western countries.

  15. Transmission electron microscopy of Ti-12Mo-13Nb Alloy aged after heat forging; Microscopia eletronica de transmissao da liga Ti-12Mo-13Nb envelhecida apos forjamento a quente

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Nathalia Rodrigues [Centro Universitario de Volta Redonda (UNIFOA), Volta Redonda, RJ (Brazil); Baldan, Renato [Universidade de Sao Paulo (USP), Lorena, SP (Brazil). Escola de Engenharia; Nunes, Carlos Angelo; Mei, Paulo Roberto [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil); Gabriel, Sinara Borborema [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil)

    2014-06-15

    Metastable β-Ti alloys possess mechanical properties, in particular a elastic modulus that depends not only on its composition but also the applied thermomechanical treatments. These alloys require high mechanical strength and a low Young’s modulus to avoid stress shielding. Preliminary studies on the development of Ti- 13Nb-12Mo alloy showed than the better properties were obtained at aged at 500 ° C / 24 h after cold forging , whose microstructure consisted of bimodal α phase in the β matrix. In this work, Ti-12Mo-13Nb alloy was heat forged and aged at 500 deg C for 24h and the microstructure was analyzed by employing X-ray diffraction and transmission electron microscopy. According to the results, while the cold forging resulted in bimodal α phase in the β matrix, hot forging resulted in a fine and homogeneous α phase in the β matrix. (author)

  16. Exposure to Tobacco Advertising and Promotion among School Children Aged 13-15 in Vietnam - an Overview from GYTS 2014.

    Science.gov (United States)

    Long, Tran Khanh; Son, Phung Xuan; Giang, Kim Bao; Hai, Phan Thi; Huyen, Doan Thi Thu; Khue, Luong Ngoc; Nga, Pham Thi Quynh; Lam, Nguyen Tuan; Minh, Hoang Van; Huong, Le Thi Thanh

    2016-01-01

    Evidence shows that tobacco advertising and promotion activities may increase tobacco consumption and usage, especially in youth. Despite the regulation on prohibiting advertisement of any tobacco product, tobacco advertisement and promotion activities are still common in Vietnam. This article presents current exposure to tobacco advertising and promotion (TAP) among school children aged 13 to 15 years in Vietnam in 2014 and potential influencing factors. Data from the Global Youth Tobacco Survey 2014 in Vietnam covering 3,430 school aged children were used. Both descriptive and analytical statistics were carried out with Stata 13 statistical software. Binary logistic regression was applied to explain the exposure to TAP among youth and examine relationships with individual factors. A significance level of padvertising or promotion. Wearing or otherwise using products related to tobacco was the most exposure TAP type reported by students (22.3%). The internet (22.1), points of sales (19.2) and social events (11.5) were three places that students aged 13-15 frequently were exposed to TAP. Binary logistic results showed that gender (female vs male) (OR = 0.61, 95%CI: 0.52 - 0.71), susceptibility to smoking (OR = 2.12, 95%CI: 1.53 - 2.92), closest friends' smoked (OR = 1.43, 95%CI: 1.2 - 1.7) and parents smoking status (OR = 2.83, 95%CI: 1.6 - 5.01) were significantly associated with TAP exposure among school-aged children. The research findings should contribute to effective implementation of measures for preventing and controlling tobacco use among students aged 13-15 in Viet Nam.

  17. Effects of individual characteristics and school environment on cigarette smoking among students ages 13-15: A multilevel analysis of the 2007 Global Youth Tobacco Survey (GYTS) data from Vietnam.

    Science.gov (United States)

    Van Minh, Hoang; Hai, Phan Thi; Giang, Kim Bao; Nga, Pham Quynh; Khanh, Pham Huyen; Lam, Nguyen Tuan; Kinh, Ly Ngoc

    2011-01-01

    This paper aims to estimate the prevalence of cigarette smoking among students in Vietnam ages 13-15 and examines its relationship with compositional and contextual factors. The data used in this paper were obtained from the 2007 Global Youth Tobacco Survey conducted in nine provinces in Vietnam. A multilevel logistic regression model was applied to analyse the association between the current incidence of cigarette smoking and factors on both the individual and school level. The prevalence of cigarette smoking among students was 3.3% overall. The prevalence of smoking among male students (5.9%) was higher than that among females (1.2%). Parental smoking was a significant risk factor for smoking among the students. Having a friend who smoked was the strongest predictor of smoking status among the study subjects. We have demonstrated that school-level factors appeared to impact the prevalence of cigarette smoking among students ages 13-15. This paper highlights the importance of utilising an extensive range of actions to prevent students from using tobacco in Vietnam. These actions should include providing specific curricula for students that address both individual characteristics and the school environment. Further, prevention programmes should also target both parental- and peer-smoking issues.

  18. α-Mangostin suppresses 12-o-tetradecanoylphorbol-13- acetate ...

    African Journals Online (AJOL)

    α-Mangostin, Matrix metalloproteinase, Osteosarcoma, Cell migration, 12-O-. Tetradecanoylphorbol-13-acetate ... International Pharmaceutical Abstract, Chemical Abstracts, Embase, Index Copernicus, EBSCO, African. Index Medicus, JournalSeek .... The results were analyzed using Student's t-test, and differences were.

  19. Dental attendance, perceptions of cost and self-care of school year 12 and 13 students: A focus on Southland, New Zealand.

    Science.gov (United States)

    Murray, Colleen; Densie, Ian Kenneth; Morgan, Christian

    2015-12-01

    Adolescents and emerging adults can provide dentists with many challenges. Little information is available on their perceptions of dental costs once they turn 18 and dentistry is no longer State-funded. The aim of this study was to explore the use of dental care by Southland students in years 12 and 13, their perceptions of the cost of four common dental procedures, self-related oral health and dental self-care habits, time off school related to dental problems, and knowledge and views regarding fluoride. After ethical approval, a 26-question survey was conducted of all Southland students in years 12 and 13. Data were statistically analysed in SPSS version 20 with the alpha value set at 0.05. The participation rate was 49.6%. Regular attendance for examinations was reported by 77.5% with non-attendance mainly related to attitudes around lack of importance or necessity. Reported dental attendance varied according to gender, ethnicity and decile rating of school attended. Although some were accurate in their estimations of dental costs, the standard deviation for all procedures was large. The majority thought that costs put people off going to the dentist. While 74.8% brushed their teeth at least twice daily, only 26.6% flossed regularly. Knowledge regarding fluoride was lacking. It may be advantageous to include education regarding costs of dental care with patients of this age. This may motivate them to improve their self-care and ensure that their oral health is of a high standard before their dental needs are no longer State-funded.

  20. Examining Student-Adult Relationships during K-12 School Age Years

    Science.gov (United States)

    Lappi, Shelly J.

    2012-01-01

    This study examined the relationship between dependent and independent variables and the effects relationships have on K-12 students as they struggle through life stressors. Thus, the research study was based upon this over arching question: How does having positive student-adult relationships impact a student's ability to cope with life…

  1. Causes, Processes and Consequences of "Desertification": Results of a Qualitative Study about the Conceptions of 12- and 13-Year-Old Students in Germany

    Science.gov (United States)

    Schubert, Jan Christoph

    2015-01-01

    Preconceptions are a crucial factor in the educational learning process. Hence, the investigation of preconceptions is important for learning and teaching in the field of geography. This study examines the preconceptions of 12- and 13-year-old students, regarding the major environmental problem of "desertification." The students'…

  2. Spheres of Influence: What Shapes Young People's Aspirations at Age 12/13 and What Are the Implications for Education Policy?

    Science.gov (United States)

    Archer, Louise; DeWitt, Jennifer; Wong, Billy

    2014-01-01

    Young people's aspirations remain an enduring focus of education policy interest and concern. Drawing on data from an ongoing five-year study of young people's science and career aspirations (age 10-14), this paper asks what do young people aspire to at age 12/13, and what influences these aspirations? It outlines the main aspirations and sources…

  3. An Exploration of High School (12 17 Year Old) Students' Understandings of, and Attitudes Towards Biotechnology Processes

    Science.gov (United States)

    Dawson, Vaille

    2007-03-01

    The products of modern biotechnology processes such as genetic engineering, DNA testing and cloning will increasingly impact on society. It is essential that young people have a well-developed scientific understanding of biotechnology and associated processes so that they are able to contribute to public debate and make informed personal decisions. The aim of this study was to examine the development of understandings and attitudes about biotechnology processes as students progress through high school. In a cross-sectional case study, data was obtained from student interviews and written surveys of students aged 12 to 17 years. The results indicate that students' ability to provide a generally accepted definition and examples of biotechnology, cloning and genetically modified foods was relatively poor amongst 12 13 year old students but improved in older students. Most students approved of the use of biotechnology processes involving micro-organisms, plants and humans and disapproved of the use of animals. Overall, 12 13 year old students' attitudes were less favourable than older students regardless of the context. An awareness of the development and range of students' understandings and attitudes may lead to a more appropriate use of biotechnology curriculum materials and thus improved biotechnology education in schools.

  4. The Optimum Font Size and Type for Students Aged 9-12 Reading Arabic Characters on Screen: A Case Study

    Science.gov (United States)

    Abubaker, A. A.; Lu, J.

    2012-05-01

    More and more, interest in the way data is displayed on screen has increased, especially with the increase in the number of people using e-text for learning purposes. So, this requires more focus on factors that affect screen legibility. Text display factors, such as font size, line length and font type, have an impact on reading online. Two font types [Arabic Traditional and Simplified Arabic] in four different sizes [10, 14, 16 and 18] are measured using Arabic text. On-line processes were measured using reading-aloud technique. Accuracy of reading was also measured by the average of errors that students made when reading the text, while reading speed was tested by the time it took students to read the text. However, results indicated that Arabic text in font size 10 is not readable to students aged 10 to 12. On the other hand, font sizes sixteen and eighteen are more readable than any smaller-sized font, the averages of error size 18 improve in all font types, while age has a significant impact on reading speed. Simplified Arabic font is reported as readable to students aged 10-12, especially in sizes 14 and 18.

  5. Dietary Habits of Welsh 12-13 Year Olds

    Science.gov (United States)

    Thomas, Non-Eleri; Cooper, Stephen-Mark; Graham, Mike; Boobier, Wyndham; Baker, Julien; Davies, Bruce

    2007-01-01

    This study examined the dietary habits of Welsh 12-13 year olds. A cohort of 84 boys and 81 girls, age 12.9 SD 0.3 years; body mass 51.3 SD 12.6kg; and stature 1.54 SD 0.08m, completed a food frequency questionnaire and seven-day food diary. Mean daily kilocalories (kcal/d), and percentages of total fat, saturated fat, carbohydrate, and protein,…

  6. Suicidal ideation and associated factors among students aged 13-15 years in Association of Southeast Asian Nations (ASEAN) member states, 2007-2013.

    Science.gov (United States)

    Peltzer, Karl; Pengpid, Supa

    2017-09-01

    The aim of this study was to assess suicidal ideation and associated factors in school-going adolescents in the Association of Southeast Asian Nations (ASEAN) member states. The analysis included 30,284 school children aged 13-15 years from seven ASEAN countries that participated in the cross-sectional global school-based student health survey (GSHS) between 2007 and 2013. The overall prevalence of suicidal ideation in the past 12 months across seven ASEAN countries was 12.3%, significantly higher in girls (15.1%) than boys (9.3%). Among seven ASEAN countries with the highest prevalence of suicidal ideation was in the Philippines (17.0%) and Vietnam (16.9%) and the lowest in Myanmar (1.1%) and Indonesia (4.2%). In multivariable logistic regression analysis, female gender, older age (14 or 15 years), living in a lower middle income country, having no friends, loneliness, bullying victimisation, having been in a physical fight in the past 12 months, lack of parental or guardian support, tobacco use and having a history of ever got drunk were associated with suicidal ideation. Different rates of suicidal ideation were observed in ASEAN member states. Several risk factors for suicidal ideation were identified which can help guide preventive efforts.

  7. [Sexual behavior in adolescents aged 12 to 17 in Andalusia (Spain)].

    Science.gov (United States)

    Rodríguez Carrión, José; Traverso Blanco, Clara Isabel

    2012-01-01

    To describe sexual behavior and activity among adolescents aged 12-17 years old in Andalusia (Spain) in 2007-2008. The data for this study were collected through an anonymous questionnaire distributed to a stratified random sample of 2,225 secondary school students in Andalusia. Participation was voluntary. A total of 388 respondents (18.2%) reported having had complete sexual intercourse, with no statistically significant differences between boys (18.0%) and girls (18.5%). However, boys initiated the following practices earlier than girls: sexual activity (14 years versus 14.4 years), masturbation (11.3 years versus 12.7 years), oral sex (13.8 years versus 14.6 years) and mutual masturbation (13.7 years versus 14.4 years). Other gender differences included the number of sexual partners (two in boys versus 1.6 in girls), recent sexual activity (higher in girls), internet sex (higher in boys), contraceptive use during the first coitus (lower in boys) and knowledge about double-barrier methods of contraception and sexually transmitted diseases (higher in girls). One out of six Andalusian secondary education students had had sexual intercourse. Two-thirds of the students were sexually active, especially girls, with limited knowledge of double-barrier methods and sexually transmitted diseases. The results of this study demonstrate the importance of including sex education as a core subject in the secondary education curriculum. Copyright © 2011 SESPAS. Published by Elsevier Espana. All rights reserved.

  8. Effects of 12-O-tetradecanoyl-phorbol-13-acetate [corrected] and sodium lauryl sulfate on the production and expression of cytokines and proto-oncogenes in photoaged and intrinsically aged human keratinocytes.

    Science.gov (United States)

    Suh, D H; Youn, J I; Eun, H C

    2001-11-01

    Skin aging may be divided into photoaging and intrinsic aging. The purpose of this study was to investigate the effects of 12-O-tetradecanoyl-phorbol-13-acetate and sodium lauryl sulfate on the production and expression of cytokines and proto-oncogenes in photoaged and intrinsically aged skin, compared with young skin. Keratinocytes were taken from newborns, young adults in their twenties, and from the forearm and thigh of volunteers in their fifties and seventies. Interleukin-1alpha and -6, and interleukin-1 receptor antagonist, c-fos and c-myc were measured after cultured keratinocytes had been treated with 12-O-tetradecanoyl-phorbol-13-acetate and sodium lauryl sulfate. There has been no report concerning the dependence of cytokine production by sodium lauryl sulfate upon photoaging and intrinsic aging. This study also involves the first investigation of the effects of aging on c-myc expression by 12-O-tetradecanoyl-phorbol-13-acetate treatment. Cytokine production decreased markedly with age. These results suggest the progressive decline of cellular function with age. The ratio of cytokine production in the irritant-treated group compared with that in the control group showed a different pattern in photoaging and intrinsic aging. With the significant difference between photoaging and intrinsic aging, T/C ratio decreased in interleukin-1alpha and interleukin-1 receptor antagonist upon aging, whereas it increased in interleukin-6. S/C ratio was uniquely elevated on photoaged skin in the 50 y age group. It is suggested that photoaged skin shows an exaggerated reaction to surfactant. Compared with the control, c-fos expression in 12-O-tetradecanoyl-phorbol-13-acetate-treated keratinocytes decreased with age in the thigh, but increased in the photoaged skin of forearm. The increased c-fos expression in 12-O-tetradecanoyl-phorbol-13-acetate-treated keratinocytes could be relevant for the predisposition of photoaged keratinocytes to malignant transformation.

  9. Comparing the Prevalence of Handedness between Normal and Congenitally Deaf Students in Age Intervals of 12 to 18 Years in Tehran

    Directory of Open Access Journals (Sweden)

    Zahra Jafari

    2007-04-01

    Full Text Available Objective: Handedness is the most prominent behavioral asymmetry in human. The term of hand preference points to prefer hand or functional asymmetry in manual tasks. The items were considered in this study were: the comparison of handedness between normal and congenitally deaf students the effects of age, sex, and pressure on using right hand for unimanual tasks on handedness the frequency of left-handers among student’s families, the influence of hand preference on English language capabilities, and the point of view of people rather to left-handers have been investigated. Materials & Methods: This cross-sectional comparative study was conducted on 760 students including 380 normal students and 380 deaf students with congenital severe or profound sensory-neural hearing loss from 12 to 18 years of age by that were selected purposefully, completing Edinburg handedness inventory in Tehran. The students didn’t have any confirmed diseases or neurological disorders, except hearing loss in deaf student. Data were gathered through the completion of the Edinburg Handedness Inventory by the students. The student’s aural records and also the confirmation of the audiologist in the deaf schools were considered in order to determine the kind and degree of hearing loss. Results: The prevalence of left-handedness among normal (9.7% and deaf (10.3% students were near to each other, and there was no significant difference between them (P=0.901, z=-1.24. The prevalence of left-handedness was higher in boys rather than girls, but there was no significant influence of sex and age on results (P>0.05. The family and/or teacher pressure for using right hand was 16.0% in normal students and 5.0% in deaf students, and they didn’t report any strict pressure or severity regard this mater. The frequency of left-handers was higher among family of normal students (22.6% than deaf students (13.2%, and the difference between them was significant statistically (P=0

  10. Student characteristics and behaviors at age 12 predict occupational success 40 years later over and above childhood IQ and parental socioeconomic status.

    Science.gov (United States)

    Spengler, Marion; Brunner, Martin; Damian, Rodica I; Lüdtke, Oliver; Martin, Romain; Roberts, Brent W

    2015-09-01

    Drawing on a 2-wave longitudinal sample spanning 40 years from childhood (age 12) to middle adulthood (age 52), the present study was designed to examine how student characteristics and behaviors in late childhood (assessed in Wave 1 in 1968) predict career success in adulthood (assessed in Wave 2 in 2008). We examined the influence of parental socioeconomic status (SES), childhood intelligence, and student characteristics and behaviors (inattentiveness, school entitlement, responsible student, sense of inferiority, impatience, pessimism, rule breaking and defiance of parental authority, and teacher-rated studiousness) on 2 important real-life outcomes (i.e., occupational success and income). The longitudinal sample consisted of N = 745 persons who participated in 1968 (M = 11.9 years, SD = 0.6; 49.9% female) and 2008 (M = 51.8 years, SD = 0.6; 53.3% female). Regression analyses and path analyses were conducted to evaluate the direct and indirect effects (via education) of the predictors on career success. The results revealed direct and indirect influences of student characteristics (responsible student, rule breaking and defiance of parental authority, and teacher-rated studiousness) across the life span on career success after adjusting for differences in parental SES and IQ at age 12. rd (c) 2015 APA, all rights reserved).

  11. Current Tobacco Smoking and Desire to Quit Smoking Among Students Aged 13-15 Years - Global Youth Tobacco Survey, 61 Countries, 2012-2015.

    Science.gov (United States)

    Arrazola, René A; Ahluwalia, Indu B; Pun, Eugene; Garcia de Quevedo, Isabel; Babb, Stephen; Armour, Brian S

    2017-05-26

    Tobacco use is the world's leading cause of preventable morbidity and mortality, resulting in nearly 6 million deaths each year (1). Smoked tobacco products, such as cigarettes and cigars, are the most common form of tobacco consumed worldwide (2), and most tobacco smokers begin smoking during adolescence (3). The health benefits of quitting are greater for persons who stop smoking at earlier ages; however, quitting smoking at any age has health benefits (4). CDC used the Global Youth Tobacco Survey (GYTS) data from 61 countries across the six World Health Organization (WHO) regions from 2012 to 2015 to examine the prevalence of current tobacco smoking and desire to quit smoking among students aged 13-15 years. Across all 61 countries, the median current tobacco smoking prevalence among students aged 13-15 years was 10.7% (range = 1.7%, Sri Lanka to 35.0%, Timor-Leste). By sex, the median current tobacco smoking prevalence was 14.6% among males (range = 2.9%, Tajikistan to 61.4%, Timor-Leste) and 7.5% among females (range = 1.6%, Tajikistan to 29.0%, Bulgaria). In the majority of countries assessed, the proportion of current tobacco smokers who desired to quit smoking exceeded 50%. These findings could be used by country level tobacco control programs to inform strategies to prevent and reduce youth tobacco use (1,4).

  12. Phenomena of Inter-age Manipulations in Interaction "Teacher-Student"

    Directory of Open Access Journals (Sweden)

    Miklyaeva A.V.,

    2017-01-01

    Full Text Available Thearticlepresentsthe results of studies of the phenomenon empirical inter-age manipulation in the pedagogical interaction. Inter-age manipulation is considered a form of manipulation carried out on the basis of an appeal to the participants in the interaction age roles. Based on the results of a survey 109 teenagers 13-15 years, using a questionnaire, color test of relations and projective drawing shows that inter-age manipulation is a common way to impact on the students, elected teacher. Teachers are the subjects of inter-age manipulation more often than students. It was revealed that the effectiveness of inter-age manipulation in pedagogical interaction increases if it is meaningful is consistent with the normative content of age roles, as well as «inter-age distance" between the teacher and the students. The greatest effectiveness of have inter-age manipulation undertaken for older teachers, and manipulation "from below" from young teachers

  13. 6 CFR 13.12 - Notice of hearing.

    Science.gov (United States)

    2010-01-01

    ... 6 Domestic Security 1 2010-01-01 2010-01-01 false Notice of hearing. 13.12 Section 13.12 Domestic Security DEPARTMENT OF HOMELAND SECURITY, OFFICE OF THE SECRETARY PROGRAM FRAUD CIVIL REMEDIES § 13.12 Notice of hearing. (a) When the ALJ receives the Complaint and answer, the ALJ will promptly serve a...

  14. 12 CFR 583.13 - Office.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Office. 583.13 Section 583.13 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY DEFINITIONS FOR REGULATIONS AFFECTING SAVINGS AND LOAN HOLDING COMPANIES § 583.13 Office. The term Office means the Office of Thrift Supervision. ...

  15. 12 CFR 404.13 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Definitions. 404.13 Section 404.13 Banks and Banking EXPORT-IMPORT BANK OF THE UNITED STATES INFORMATION DISCLOSURE Access to Records Under the Privacy Act of 1974 § 404.13 Definitions. For purposes of this subpart, the following definitions shall apply...

  16. Study for the charge symmetric systems, 12C+13N and 12C+13C with the orthogonalized coupled-reaction-channel method

    International Nuclear Information System (INIS)

    Imanishi, B.; Denisov, V.; Motobayashi, T.

    1996-10-01

    The charge-symmetric scattering systems, 12 C+ 13 N and 12 C+ 13 C have been investigated by using the orthogonalized coupled-reaction-channel (OCRC) method with the basis functions of the elastic, inelastic and transfer channels defined by the single-particle states, 1p1/2, 2s1/2, 1d5/2 and 1d3/2 of the valence nucleon in 13 N or 13 C. The data of the elastic scattering of 13 N on 12 C measured by Lienard et al. have been explained consistently with the data of the elastic and inelastic scattering of the 12 C+ 13 C system. The CRC effects both on the above systems are very strong, although those on the 12 C+ 13 N system are fairly weaker than the 12 C+ 13 C system. The role of the highly excited single-particle states 1d3/2 is particularly important in the formation of a specific CRC scheme, i.e., the formation of the covalent molecules due to the hybridization caused by the mixing of the different parity single-particle states. The fusion cross sections of the 12 C+ 13 C system at energies below the Coulomb barrier are strongly enhanced as a result of the strong CRC effects as compared with those of the 12 C+ 12 C system, while in 12 C+ 13 N system the enhancement of the sub-barrier fusion has not been observed. The above absorption mechanism for the 12 C+ 13 C system explains the lack of the molecular-resonance phenomena observed in the 12 C+ 12 C system. We check the effects of the dipole (E1) transition of the valence nucleon in 13 N (and also in 13 C) due to the core-core Coulomb interaction in the scattering at sub-barrier energies. The effects are not appreciable. (author)

  17. The Impact of Age on Using Language Learning Strategies

    Science.gov (United States)

    Sepasdar, Mansoreh; Soori, Afshin

    2014-01-01

    Since age plays an important role in learning a second or foreign language, the present study investigated how different students in different age groups used language learning strategies. The participants of this study were 94 Iranian EFL students from four educational levels and different age groups as, primary (10-12), guidance (13-15), high…

  18. Current Cigarette Smoking, Access, and Purchases from Retail Outlets Among Students Aged 13-15 Years - Global Youth Tobacco Survey, 45 Countries, 2013 and 2014.

    Science.gov (United States)

    D'Angelo, Denise; Ahluwalia, Indu B; Pun, Eugene; Yin, Shaoman; Palipudi, Krishna; Mbulo, Lazarous

    2016-09-02

    Tobacco use is a leading preventable cause of morbidity and mortality, with nearly 6 million deaths caused by tobacco use worldwide every year (1). Cigarette smoking is the most common form of tobacco use in most countries, and the majority of adult smokers initiate smoking before age 18 years (2,3). Limiting access to cigarettes among youths is an effective strategy to curb the tobacco epidemic by preventing smoking initiation and reducing the number of new smokers (3,4). CDC used the Global Youth Tobacco Survey (GYTS) data from 45 countries to examine the prevalence of current cigarette smoking, purchase of cigarettes from retail outlets, and type of cigarette purchases made among school students aged 13-15 years. The results are presented by the six World Health Organization (WHO) regions: African Region (AFR); Eastern Mediterranean Region (EMR); European Region (EUR); Region of the Americas (AMR); South-East Asian Region (SEAR); and Western Pacific Region (WPR). Across all 45 countries, the median overall current cigarette smoking prevalence among students aged 13-15 years was 6.8% (range = 1.7% [Kazakhstan]-28.9% [Timor-Leste]); the median prevalence among boys was 9.7% (2.0% [Kazakhstan]-53.5% [Timor-Leste]), and among girls was 3.5% (0.0% [Bangladesh]-26.3% [Italy]). The proportion of current cigarette smokers aged 13-15 years who reported purchasing cigarettes from a retail outlet such as a store, street vendor, or kiosk during the past 30 days ranged from 14.9% [Latvia] to 95.1% [Montenegro], and in approximately half the countries, exceeded 50%. In the majority of countries assessed in AFR and SEAR, approximately 40% of cigarette smokers aged 13-15 years reported purchasing individual cigarettes. Approximately half of smokers in all but one country assessed in EUR reported purchasing cigarettes in packs. These findings could be used by countries to inform tobacco control strategies in the retail environment to reduce and prevent marketing and sales of

  19. Fourier spectroscopy of the 12C2, 13C2, and 12C13C (0-0) swan bands

    International Nuclear Information System (INIS)

    Amiot, C.

    1983-01-01

    The (0-0) band of the C 2 Swan electronic system d 3 Pi/sub g/→a 3 Pi/sub u/ has been recorded by Fourier spectroscopy. The three isotopes species 12 C 2 , 13 C 2 , and 12 C 13 C were investigated. The observed wavenumbers were reduced to molecular parameters using a nonlinear least-square fitting procedure. Well-known perturbations at N' = 47 and N' = 51 again observed in the e 12 C 2 d 3 Pi/sub g/ (v = 0) level. Perturbations of the same kind are present in the 13 C 2 spectrum at N' = 34 and N' = 44,48,52. The 12 C 13 C spectrum exhibits in the observed spectral range a unique perturbation for N' = 41

  20. Molecular Biology Masterclasses--Developing Practical Skills and Building Links with Higher Education in Years 12/13

    Science.gov (United States)

    Hooley, Paul; Cooper, Phillippa; Skidmore, Nick

    2008-01-01

    A one day practical course in molecular biology skills suitable for year 12/13 students is described. Colleagues from partner schools and colleges were trained by university staff in basic techniques and then collaborated in the design of a course suitable for their own students. Participants carried out a transformation of "E.coli"…

  1. 46 CFR 12.15-13 - Deck engine mechanic.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13 Shipping... ENDORSEMENTS Qualified Member of the Engine Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC or MMD endorsed as junior engineer. The...

  2. 13 CFR 117.12 - Mediation.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Mediation. 117.12 Section 117.12... Mediation. (a) SBA shall, after ensuring that the complaint falls within the coverage of this Act and all... clearly within an exception, promptly refer the complaint to the Federal Mediation and Conciliation...

  3. Psychiatric disorders in students in six French universities: 12-month prevalence, comorbidity, impairment and help-seeking.

    Science.gov (United States)

    Verger, Pierre; Guagliardo, Valérie; Gilbert, Fabien; Rouillon, Frédéric; Kovess-Masfety, Viviane

    2010-02-01

    Few studies have explored the prevalence of psychiatric disorders (PD) among university students. This article aims to study 12-month prevalence of PD in university students, their socio-economic correlates, impairment in daily life and help-seeking behaviours. Cross-sectional study of randomly selected first-year students aged 18-24 years, enrolled in one of the six universities in south-eastern France in 2005-2006. We used the WHO CIDI-Short Form to derive DSM-IV diagnoses and the Sheehan disability scale to evaluate impairment. We studied their correlates with multiple logistic regressions. The 12-month prevalence of major depressive disorder (MDD), anxiety disorders (AD) and substance use disorders (SUD) were 8.9% (95% CI: 7.2-10.9), 15.7% (95% CI: 13.5-18.2) and 8.1% (95% CI: 6.7-9.8), respectively. MDD was associated with precarious economic situation (OR = 1.83; 95% CI: 1.03-3.23), AD with a precarious job or unemployment of the father (OR = 2.08; 95% CI: 1.04-4.14) and SUD with higher educational level of father (OR = 2.17; 95% CI: 1.28-3.67) or having a paid job (OR = 1.82; 95% CI: 1.06-3.13). "Marked" or "extreme" impairment (score > or =7 for at least one of the domains in the Sheehan scale) was noted for 51.7% of students presenting a PD and was even more frequent in the presence of MDD/AD comorbidity. Only 30.5% of the students with a PD had sought professional help in the past 12 months. This study provides new results regarding university students suggesting a link between precarious economic situations and MDD. The frequent impairment arising from PD alongside low rates of help-seeking suggests that PD could be one of the factors in academic failure in first year of university. These results should be used to improve prevention and care of PD in university students in France.

  4. Reading for 11-13-Year-Old Students in the Digital Age: New Zealand Case Studies

    Science.gov (United States)

    Fletcher, Jo; Nicholas, Karen

    2018-01-01

    ABSTRACT In New Zealand schools, the focus continues to be on improving the reading achievement of all students situated across a range of socio-economic groups. This is particularly so for our young adolescent students, where research investigations have indicated some concerning trends which influence reading development for this age group. This…

  5. Differences in motor skills of pupils aged 13 measured in 1970 and 1995

    Directory of Open Access Journals (Sweden)

    Stojanović Darko

    2013-01-01

    Full Text Available Body fat percentage is higher in relation to muscle in reduced physical activity, which significantly affects the level of motorabilities of students. The results of previously conducted research in the area of motor skills quickly become obsolete. During school age tracking students growth and development enables us to assess the regularity of the developmental period. By measuring the motor dimensions we come to some data about their development. If we want to get to the question of whether there is a change in the development of motor skills, it is necessary to compare their development with the development of students the same age measured more than twenty years. The aim of this study was to determine the difference of motor abilities of the pupils aged 13 years measured in 1970 and 1995 year. Measurement of motor skills are performed according to the methodology that was applied by Kurelić et al. (1975. Determination of differences was done by Difference test from the statistical package Statistica 8.0 for Windows, compared to the availabledata of means and standard deviations of respondents. The results of this research indicate that students which are measured in 1970 had better motor skills compared to students of the same age measured in 1995, except in test foot taping (MTAN.

  6. 2011-12 National Postsecondary Student Aid Study (NPSAS:12): Student Financial Aid Estimates for 2011-12. First Look. NCES 2013-165

    Science.gov (United States)

    Radwin, David; Wine, Jennifer; Siegel, Peter; Bryan, Michael

    2013-01-01

    This brief report presents selected findings about student financial aid during the 2011-12 academic year. These findings are based on data from the 2011-12 National Postsecondary Student Aid Study (NPSAS:12), a nationally representative sample survey of undergraduate and graduate students enrolled any time between July 1, 2011, and June 30, 2012,…

  7. Interleukin-13 and age-related macular degeneration

    Directory of Open Access Journals (Sweden)

    Bo Fu

    2017-04-01

    Full Text Available AIM: To identify the effects of interleukin (IL-13 on retinal pigment epithelial (RPE cells and the IL-13 level in aqueous humor of age-related macular degeneration (AMD patients. METHODS: IL-13 levels in aqueous humor specimens from AMD patients were detected with enzyme-linked immunosorbent assay (ELISA. ARPE-19 cells were treated with 10 ng/mL IL-13 for 12, 24, and 48h. The cell proliferaton was evaluated by the MTS method. The mRNA and protein levels of α-SMA and ZO-1 were evaluated with quantitative real-time polymerase chain reaction (qRT-PCR and Western blot respectively. The expression of tumor necrosis factor-α (TNF-α, transforming growth factor-β (TGF-β and vascular endothelial growth factor (VEGF were assessed by ELISA. RESULTS: IL-13 levels in the aqueous humor of patients with AMD were significantly higher than those in the control (167.33±17.64 vs 27.12±5.65 pg/mL; P<0.01. In vitro, IL-13 of high concentrations (10, 15, and 20 ng/mL inhibited ARPE-19 cell proliferation. α-SMA mRNA in ARPE-19 cell were increased (1.017±0.112 vs 1.476±0.168; P<0.001 and ZO-1 decreased (1.051±0.136 vs 0.702±0.069; P<0.001 after treated with 10 ng/mL IL-13 for 48h. The protein expression of α-SMA and ZO-1 also showed the same tendency (α-SMA: P=0.038; ZO-1: P=0.008. IL-13 significantly reduced the level of TNF-α (44.70±1.67 vs 31.79±3.53 pg/mL; P=0.005 at 48h, but the level of TGF-β2 was significantly increased from 34.44±2.92 to 57.61±6.31 pg/mL at 24h (P=0.004 and from 61.26±1.11 to 86.91±3.59 pg/mL at 48h (P<0.001. While expressions of VEGF didn’t change after IL-13 treatment. CONCLUSION: IL-13 in vitro inhibit ARPE-19 cell proliferation and expression in the aqueous may be associated with AMD.

  8. The Prevalence of Enamel Defects in Students 7-12 Years of Age in Isfahan

    Directory of Open Access Journals (Sweden)

    Mahmodian J

    2000-05-01

    Full Text Available Dental enamel is the end product of amelogenesis, which can be considered to take place in"nthree interrelated phases. When this complex sequence of cytological and physicochemica! events"ndisrupted by genetic or environmental factors, the function of the ameloblasts may be disrupted"npermanently or temporarily. The result shows qualitative and quantitative defects that may range from a"ncomplete absence of enamel or a slight discoloration. The aim of this study was to determine the"nprevalence of enamel defects by DDE index in a randomly selection group of 1637 students age 7-12"nyears old in Isfahan (0.2-0.3 PPMF". Enamel defects were present on one or more teeth in 27% of the"ncases. The most common affected tooth was the central maxillary and then first molar of maxilla. The"nmost common affected surfaces were buccal. Hypoplastic defects were found in first molar; however"npremolar and canine were affected by diffuse white lines opacity.

  9. 12 CFR 13.5 - Customer information.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Customer information. 13.5 Section 13.5 Banks and Banking COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY GOVERNMENT SECURITIES SALES...) The customer's investment objectives; and (d) Such other information used or considered to be...

  10. Predictors of dental rehabilitation in children aged 3?12 years

    OpenAIRE

    Gopinath, Vellore Kannan; Awad, Manal A.

    2015-01-01

    Objectives: The aim of this study was to evaluate the proportion of completed treatments and to study the factors affecting the full mouth dental rehabilitation in pediatric patients treated by undergraduate students at the College of Dental Medicine Teaching Clinics, University of Sharjah. Materials and Methods: A retrospective study was conducted on 270 children aged less than 12 years (mean age 7.6, SD 2.04). Comprehensive dental rehabilitation reports of child patients that were completed...

  11. Predictors of dental rehabilitation in children aged 3-12 years.

    Science.gov (United States)

    Gopinath, Vellore Kannan; Awad, Manal A

    2015-01-01

    The aim of this study was to evaluate the proportion of completed treatments and to study the factors affecting the full mouth dental rehabilitation in pediatric patients treated by undergraduate students at the College of Dental Medicine Teaching Clinics, University of Sharjah. A retrospective study was conducted on 270 children aged less than 12 years (mean age 7.6, SD 2.04). Comprehensive dental rehabilitation reports of child patients that were completed by final year dental undergraduate students from the year 2009 to 2011 were reviewed. Data on complete history, oral examination, dental charting, and treatment plan were collected from pediatric dentistry case sheet. Dental caries was charted using WHO 1997 criteria. Dental treatment needs and completion of dental care delivered to children involved in this study were assessed using DMFT/deft scores. Percentages of treatment provided included completed restorations (94%) and space management (84%) in primary dentition, whereas 98% of restoration and 94% of required sealants were completed in permanent dentition. The percentage of completed dental treatment including sealant placement was 61%. Age of the child and the number of decayed teeth present before the start of the treatment significantly correlated with the children in the incomplete treatment category (P dental care was provided in a holistic approach to the children attending College of Dental Medicine training clinics. Age of the child and the number of decayed teeth were the factors affecting dental rehabilitation in children aged 3-12 years.

  12. Impact of an Aging Simulation Game on Pharmacy Students' Empathy for Older Adults.

    Science.gov (United States)

    Chen, Aleda M H; Kiersma, Mary E; Yehle, Karen S; Plake, Kimberly S

    2015-06-25

    To evaluate changes in empathy and perceptions as well as game experiences among student pharmacists participating in an aging simulation game. First-year student pharmacists participated in an aging simulation game. Changes were measured pre/post-activity using the Kiersma-Chen Empathy Scale (KCES) and Jefferson Scale of Empathy--Health Professions Scale (JSE-HPS) for empathy and the Aging Simulation Experience Survey (ASES) for perceptions of older adults' experiences and game experiences. Wilcoxon signed rank tests were used to determine changes. One hundred fifty-six student pharmacists completed the instruments. Empathy using the KCES and JSE-HPS improved significantly. Of the 13 items in the ASES, 9 significantly improved. Simulation games may help students overcome challenges demonstrating empathy and positive attitudes toward elderly patients.

  13. Determinants of developmental delay in infants aged 12 months.

    Science.gov (United States)

    Slykerman, Rebecca F; Thompson, John M D; Clark, Phillipa M; Becroft, David M O; Robinson, Elizabeth; Pryor, Jan E; Wild, Chris J; Mitchell, Edwin A

    2007-03-01

    The aim of this study was to determine which demographic, maternal, obstetric and postnatal variables were associated with achievement of developmental milestones at the age of 12 months in term infants. Mothers and babies were enrolled in the Auckland Birthweight Collaborative Study shortly after birth. All infants were full term (gestation >or= 37 weeks). Approximately half of the sample were small for gestational age (SGA = birthweight 10th percentile). A maternal interview was conducted soon after birth. Phase 2 of the study occurred 12 months later when mothers were sent a postal questionnaire requesting information about the child's health and development during the first year of life using the Denver Prescreening Developmental Questionnaire. Seven hundred and forty-four (85.4%) European mothers returned the postal questionnaire. SGA children were not at increased risk of developmental delay at 12 months of age. In a sample representative of New Zealand European children, after adjustment for the effects of potential confounders, maternal smoking during pregnancy (OR = 2.1 [95% CI 1.1, 4.0]), maternal smoking during the first year of life (OR = 1.9 [95% CI 1.0, 3.8]) and low levels of satisfaction with parenting (OR = 2.4 [95% CI 1.1, 5.2]) were associated with significantly increased risk of developmental delay. In the subgroup of SGA children, maternal smoking during pregnancy (OR = 2.9 [95% CI 1.4, 6.2]), high levels of stress associated with parenting (OR = 2.2 [95% CI 1.2, 4.0]), and low levels of satisfaction with parenting (OR = 4.3 [95% CI 1.3, 13.5]) were significantly associated with developmental delay after adjustment for the effects of potential confounders. In conclusion, maternal and postnatal factors were better predictors of developmental delay than demographic variables.

  14. 12 CFR 13.3 - Business conduct.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Business conduct. 13.3 Section 13.3 Banks and....3 Business conduct. A bank that is a government securities broker or dealer shall observe high standards of commercial honor and just and equitable principles of trade in the conduct of its business as a...

  15. 12 CFR 13.4 - Recommendations to customers.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Recommendations to customers. 13.4 Section 13.4... PRACTICES § 13.4 Recommendations to customers. In recommending to a customer the purchase, sale or exchange... reasonable grounds for believing that the recommendation is suitable for the customer upon the basis of the...

  16. 13 CFR 305.12 - Project sign.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Project sign. 305.12 Section 305... WORKS AND ECONOMIC DEVELOPMENT INVESTMENTS Requirements for Approved Projects § 305.12 Project sign. The... the construction period of a sign or signs at a conspicuous place at the Project site indicating that...

  17. 12 CFR 412.13 - Limitations and penalties.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Limitations and penalties. 412.13 Section 412.13 Banks and Banking EXPORT-IMPORT BANK OF THE UNITED STATES ACCEPTANCE OF PAYMENT FROM A NON-FEDERAL SOURCE FOR TRAVEL EXPENSES § 412.13 Limitations and penalties. (a) This part is in addition to and not in...

  18. 12 CFR 708a.13 - Voting guidelines.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 6 2010-01-01 2010-01-01 false Voting guidelines. 708a.13 Section 708a.13... INSURED CREDIT UNIONS TO MUTUAL SAVINGS BANKS § 708a.13 Voting guidelines. A converting credit union must conduct its member vote on conversion in a fair and legal manner. NCUA provides the following guidelines...

  19. Cigarette Smoking among Adolescents aged 13-15 in Viet Nam and Correlates of Current Cigarette Smoking: Results from GYTS 2014 Data.

    Science.gov (United States)

    Huong, Le Thi; Vu, Nga Thi Thu; Dung, Nguyen Ngoc; Xuan, Le Thi Thanh; Giang, Kim Bao; Hai, Phan Thi; Huyen, Doan Thu; Khue, Luong Ngoc; Lam, Nguyen Tuan; Minh, Hoang Van; Nga, Pham Thi Quynh

    2016-01-01

    The aim of this paper is to report the rate of current and ever cigarette smoking and explore correlates of current cigarette smoking among adolescents aged 13-15 in Viet Nam. This analysis was derived from GYTS survey, which comprised of 3,430 adolescents aged 13-15, conducted in 2014 in 13 cities and provinces of Viet Nam. We calculated the weighted rates of current and ever cigarette smoking and reported patterns of smoking behavior. We also performed logistic regression to explore correlates of current cigarette smoking behavior. The weighted rate of ever cigarette smoking was 9.5% (95% confidence interval (CI): 8.5 %-10.5%), in which the weighted rate among males (15.4%; 95% CI: 13.6%-17.0%) was higher than that among females (4.2%; 95% CI: 3.3%-5.1%). The weighted rate of current cigarette smoking was relatively low at 2.5% (95%CI: 2.0%- 3.0%) with higher weighted rate among males (4.9%; 95% CI: 3.8%-5.9%) compared to the corresponding figure among females (0.2%; 95% CI: 0.0 %-0.5%). Current cigarette smoking was significantly higher among males than females, in students aged 15 versus 13 years old, and in students who had several or all close friends smoking and students with daily observation of smoking at school. For greater smoking reduction outcomes, we recommend that tobacco interventions for adolescents should consider targeting more male students at older ages, establish stricter adherence to school-based banning of cigarette smoking, engage both smoking and nonsmoking adolescents and empower adolescents to resist peer smoking influence as well as changing their norms or beliefs towards smoking benefits.

  20. Synthetic Swan band profile of (1,0) of 12C12C and (0,0) of 12C12C and 12C13C in comets

    International Nuclear Information System (INIS)

    Swamy, K.S.K.

    1987-01-01

    The statistical equilibrium calculations of the 12 C 13 C molecule based on the resonance fluorescence process give similar results to those of the normal molecule. Therefore the assumption that the observed intensities of bands of the normal and the isotopic molecule differ only by their abundance ratio is reasonable. The synthetic profile of the (1,0) Swan band of 12 C 13 C (0,0) band of 12 C 12 C and 12 C 13 C have been calculated. The relative merits of using the rotational structure of the (1,0) or (0,0) band for the determination of the isotopic ratio 12 C/ 13 C is discussed briefly. (author)

  1. Going for (Nano)Gold: A University Open Day Experiment for Year 13 Students

    Science.gov (United States)

    Baker, Christopher; Patel, Bhavik Ani; Cragg, Alexander S.; Cragg, Peter J.

    2013-01-01

    Open day activities rarely give applicants a real sense of the practical and intellectual work that goes on in university chemistry departments. We devised an experiment for year 13 (age 17-18) students based on the size-dependent colours of gold nanoparticles and linked this to current research in diagnostic medicine. The experience was designed…

  2. Eating disorder symptoms among undergraduate and graduate students at 12 U.S. colleges and universities.

    Science.gov (United States)

    Lipson, S K; Sonneville, K R

    2017-01-01

    We sought to estimate the prevalence of eating disorder symptoms in a large sample of U.S. college students and variations therein across student characteristics. Participants were 9713 students from 12 colleges and universities participating in the Healthy Bodies Study. We used gender-stratified logistic regression to estimate bivariate correlates of elevated eating disorder symptoms, past-month objective binge eating, and past-month compensatory behaviors across student characteristics including age, degree-level, sexual orientation, race/ethnicity, first-generation status, citizenship, academic and extracurricular characteristics, and weight status. Eating disorder outcomes were based on the Eating Disorder Examination Questionnaire. We observed higher prevalence of objective binge eating among females relative to males (49% versus 30%, pobesity. When compared to individuals with a healthy weight, those with overweight had greater eating disorder risk (males OR=3.5; females OR=2.0), binge eating (males OR=2.1; females OR=1.9), and use of compensatory behaviors (males OR=1.5; females OR=1.3). This study suggests smaller gender difference in prevalence of eating disorder symptoms than previously reported and identifies students with overweight/obesity as salient targets for campus-based eating disorder screening and early intervention efforts. Copyright © 2016 Elsevier Ltd. All rights reserved.

  3. 12 CFR 905.13 - Office of Supervision.

    Science.gov (United States)

    2010-01-01

    ... market, credit and operational risks; (3) Analyzing the financial performance of the Banks; (4) Preparing... Loan Mortgage Corporation (Freddie Mac) purchases and guarantees; (5) Analyzing the Banks' performance... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Office of Supervision. 905.13 Section 905.13...

  4. Changing negative stereotypes regarding aging in undergraduate nursing students.

    Science.gov (United States)

    Sarabia-Cobo, C M; Castanedo Pfeiffer, C

    2015-09-01

    The aim of this study was to explore the modification of stereotypes and myths regarding aging among third-year nursing students before and after undergoing an Aging Nursing course. A within-subject repeated-measures descriptive study was conducted. The Negative Stereotypes Questionnaire about Aging (CENVE) was used. The overall prevalence of negative stereotypes was 62.0% pre-intervention (P1) and 12.3% post-intervention (P2) measured; these values were 63.5% (P1) and 9.2% (P2) for the health factor, 43.1% (P1) and 4.9% (P2) for the motivation and social factors and 58.3% (P1) and 3.8% (P2) for the character-personality factor. Paired Student's t tests confirmed that the differences were statistically significant. There was a high prevalence of negative stereotypes toward aging among the nursing students, even though they had conducted clinical practice and were in their third year. The course was demonstrated to be effective in modifying these stereotypes. The proper training of future professionals markedly contributes the dispensation of proper care and the eradication of ageism, which remains prevalent in the healthcare system. Copyright © 2015 Elsevier Ltd. All rights reserved.

  5. Homocyst(e)ine, folate, and vitamin B12 status in a cohort of Welsh young people aged 12-13 years old.

    Science.gov (United States)

    Thomas, N E; Cooper, S M; Baker, J S; Graham, M R; Davies, B

    2008-01-01

    The aim of this unique study was to consider the relationship between folate and vitamin B(12) on homocyst(e)ine (Hcy) concentration in an apparently healthy cohort of Welsh young people. A cohort of 179, 12-13 year olds (88 boys and 91 girls) were measured for Hcy, folate, vitamin B(12), adiposity, and dietary habits. Boys had significantly higher waist circumference and folate concentration than girls. Folate was negatively associated with Hcy in both sexes, whereas vitamin B(12) was negatively associated with Hcy in boys only. Adiposity was not associated with Hcy. Folate was an independent predictor of Hcy in both sexes, whilst vitamin B(12) was an independent determinant of Hcy in boys only. Familial history of cardiovascular disease (CVD) risk factors was identified in 69% of the children with elevated Hcy (> or = 8.5 mumol.L(-1)). Young people might be encouraged to increase their folate intake through diet, particularly by increasing their consumption of leafy vegetables and fruit. Further research is necessary to determine the exact contribution of genetics and diet on Hcy levels in young people, and whether Hcy levels during childhood and adolescence might influence future CVD risk.

  6. 12 CFR 1408.13 - Contracting for collection services.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Contracting for collection services. 1408.13 Section 1408.13 Banks and Banking FARM CREDIT SYSTEM INSURANCE CORPORATION COLLECTION OF CLAIMS OWED THE UNITED STATES Administrative Collection of Claims § 1408.13 Contracting for collection services. The...

  7. Prevalence of Sports Injuries Among 13- to 15-Year-Old Students in 25 Low- and Middle-Income Countries.

    Science.gov (United States)

    Street, Erica J; Jacobsen, Kathryn H

    2017-04-01

    The goal of this study was to compare the sex-specific prevalence rate of serious sports injuries in the past year among students ages 13-15 years from 25 low- and middle-income countries (LMICs) globally. Data from 46,922 nationally-representative students who participated in the Global School-based Student Health Survey (GSHS) were analyzed using complex samples analysis. The GSHS defines injuries as serious when they cause at least one full day of missed school or usual activities or require clinical treatment. Students reporting more than one serious injury in the past year are asked about the single most serious injury. The proportion of students reporting at least one serious injury in the past year ranged from 15-71 % (median 44 %) among boys and 8-70 % (median 30 %) among girls. The proportion of most-serious injuries in the past year that were sports-related ranged from 25-60 % among injured boys (median 35 %) and 12-56 % among injured girls (median 24 %). The most common types of sports-related injuries were broken bones and dislocated joints, reported by 13-62 % (median 28 %) of boys with sports injuries and 10-86 % (median 25 %) of girls with sports injuries. Although the annual injury rates among early adolescents vary widely between countries, the GSHS shows that sports injuries are common globally among both male and female middle school students. Understanding global trends in the health risks for various population groups, such as adolescents, allows community health partnerships to proactively address health needs in the communities they serve.

  8. 40 CFR 13.12 - Interest and charges pending waiver or review.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Interest and charges pending waiver or review. 13.12 Section 13.12 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL CLAIMS COLLECTION STANDARDS Collection § 13.12 Interest and charges pending waiver or review. Interest, penalty...

  9. [Suicide attempts of 48 children aged 6-12 years].

    Science.gov (United States)

    Berthod, C; Giraud, C; Gansel, Y; Fourneret, P; Desombre, H

    2013-12-01

    Research is limited on suicide attempts in children under 13 years of age. The objective of this study was to provide an in-depth description of this population. The present study is both retrospective and descriptive. Data were collected retrospectively from a file containing the causes for hospitalization of each child admitted into the Department of Child Psychiatry at the hôpital Femme-Mère-Enfant (hospices civils de Lyon). We included all patients under 13 years of age who were hospitalized for a suicide attempt between 2008 and 2011. The methods used to collect the medical records consisted in using a form made up of four major parts: suicide attempts, social environment, medical history, and therapy. The 26 girls and 22 boys included had a mean age of 11.52 years. The boys were younger than the girls (P=0.047) and their parents were usually separated (P=0.034). The boys used more violent means to commit suicide in comparison to the girls (P=0.048). On average, children using violent means were younger (P=0.013). Boys underwent more psychotherapy (P=0.027) and were prescribed more psychotropic medication in comparison to girls (P=0.051). Adjustment disorders (37.5%) and depression (27%) were the two main diagnoses for hospitalization. They were hospitalized on average (±standard deviation) 9.6 days (±10 days). Psychotherapy was organized when leaving the hospital (98%) with legal measures (8.3%), change of residence (12.5%), and prescription of psychotropic drugs (37.5%). None had physical complications. In children under 13 years of age, attempted suicide was more frequent in girls than boys. However, the sample included 18 girls and nine boys who were 12 years old (sex ratio of 12-year-olds, 0.5). There were more boys (16 boys/eight girls) in the children under 12 (sex ratio of 8- to 11-year-olds, 1.6). Children under 11 used more violent means (P=0.01). The literature also reports that more violent means lead to a greater risk of death by suicide

  10. Excitation functions of the systems 12C+14C and 13C+12C

    International Nuclear Information System (INIS)

    Haindl, E.

    1975-01-01

    The excitation functions of the systems 12 C+ 14 C and 13 C+ 12 C are investigated for different exit channels. The excitation functions measured do not show correlated structures as in the system 12 C+ 12 C. (WL/AK) [de

  11. Twelve-month discontinuation rates of levonorgestrel intrauterine system 13.5 mg and subdermal etonogestrel implant in women aged 18-44: A retrospective claims database analysis.

    Science.gov (United States)

    Law, Amy; Liao, Laura; Lin, Jay; Yaldo, Avin; Lynen, Richard

    2018-04-21

    To investigate the 12-month discontinuation rates of levonorgestrel intrauterine system 13.5 mg (LNG-IUS 13.5) and subdermal etonogestrel (ENG) implant in the US. We identified women aged 18-44 who had an insertion of LNG-IUS 13.5 or ENG implant from the MarketScan Commercial claims database (7/1/2013-9/30/2014). Women were required to have 12 months of continuous insurance coverage prior to the insertion (baseline) and at least 12-months after (follow-up). Discontinuation was defined as presence of an insurance claim for pregnancy-related services, hysterectomy, female sterilization, a claim for another contraceptive method, or removal of the index contraceptive without re-insertion within 30 days. Using Cox regression we examined the potential impact of ENG implant vs. LNG-IUS 13.5 on the likelihood for discontinuation after controlling for patient characteristics. A total of 3680 (mean age: 25.4 years) LNG-IUS 13.5 and 23,770 (mean age: 24.6 years) ENG implant users met the selection criteria. Prior to insertion, 56.6% of LNG-IUS 13.5 and 42.1% of ENG implant users had used contraceptives, with oral contraceptives being most common (LNG-IUS 13.5: 42.1%; ENG implant: 28.5%). Among users of LNG-IUS 13.5 and ENG implant, rates of discontinuation were similar during the 12-month follow-up (LNG-IUS 13.5: 24.9%; ENG implant: 24.0%). Regression results showed that women using LNG-IUS 13.5 vs. ENG implant had similar likelihood for discontinuation (hazard ratio: 0.97, 95% confidence interval: 0.90-1.05, p=.41). In the real-world US setting, women aged 18-44 using LNG-IUS 13.5 and ENG implant have similar discontinuation rates after 12 months. In the United States, women aged 18-44 using levonorgestrel intrauterine system (13.5 mg) and subdermal etonogestrel implant have similar discontinuation rates after 12 months. Copyright © 2018 Elsevier Inc. All rights reserved.

  12. 12 CFR 508.13 - Decision of the Office.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Decision of the Office. 508.13 Section 508.13 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY REMOVALS, SUSPENSIONS, AND PROHIBITIONS WHERE A CRIME IS CHARGED OR PROVEN § 508.13 Decision of the Office. (a) Within 30 days after the recommended decision has been certifie...

  13. Prevalence of Unique Pediatric Pathologies Encountered by Paramedic Students Across Age Groups.

    Science.gov (United States)

    Ernest, Eric V; Brazelton, Tom B; Carhart, Elliot D; Studnek, Jonathan R; Tritt, Patricia L; Philip, Genghis A; Burnett, Aaron M

    2016-08-01

    Introduction Traditionally, Emergency Medical Services (EMS) educators have divided the pediatric population into age groups to assist in targeting their clinical and didactic curriculum. Currently, the accrediting body for paramedic training programs requires student exposure to pediatric patients based entirely on age without specifying exposure to specific pathologies within each age stratification. Identifying which pathologies are most common within the different pediatric age groups would allow educators to design curriculum targeting the most prevalent pathologies in each age group and incorporating the physiologic and psychological developmental milestones commonly seen at that age. Hypothesis It was hypothesized that there are unique clusterings of pathologies, represented by paramedic student primary impressions, that are found in different age groups which can be used to target provider education. This is a retrospective review of prospectively collected data documented by paramedic students in the Fisdap (Field Internship Student Data Acquisition Project; Saint Paul, Minnesota USA) database over a one-year period. For the purposes of this study, pediatric patients were defined arbitrarily as those between the ages of 0-16 years. All paramedic student primary impressions recorded in Fisdap for patients aged 0-16 years were abstracted. Primary impression by age was calculated and graphed. The frequency of primary impression was then assessed for significance of trend by age with an alpha ≤.05 considered significant. The following primary impressions showed clinically and statistically significant variability in prevalence among different pediatric age groups: respiratory distress, medical-other, abdominal pain, seizure, overdose/poisoning, behavioral, and cardiac. In patients less than 13 years old, respiratory and other-medical were the most common two primary impressions and both decreased with age. In patients 5-16 years old, the prevalence of

  14. 12 CFR 13.100 - Obligations concerning institutional customers.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Obligations concerning institutional customers... GOVERNMENT SECURITIES SALES PRACTICES Interpretations § 13.100 Obligations concerning institutional customers... to institutional customers. (b) The OCC's suitability rule (§ 13.4) is fundamental to fair dealing...

  15. Incidence of medically attended influenza infection and cases averted by vaccination, 2011/12 and 2012/13 influenza seasons

    Science.gov (United States)

    Jackson, Michael L.; Jackson, Lisa A.; Kieke, Burney; McClure, David; Gaglani, Manjusha; Murthy, Kempapura; Malosh, Ryan; Monto, Arnold; Zimmerman, Richard K.; Foppa, Ivo M.; Flannery, Brendan; Thompson, Mark G.

    2018-01-01

    Background We estimated the burden of outpatient influenza and cases prevented by vaccination during the 2011/12 and 2012/13 influenza seasons using data from the United States Influenza Vaccine Effectiveness (US Flu VE) Network. Methods We defined source populations of persons who could seek care for acute respiratory illness (ARI) at each of the five US Flu VE Network sites. We identified all members of the source population who were tested for influenza during US Flu VE influenza surveillance. Each influenza-positive subject received a sampling weight based on the proportion of source population members who were tested for influenza, stratified by site, age, and other factors. We used the sampling weights to estimate the cumulative incidence of medically attended influenza in the source populations. We estimated cases averted by vaccination using estimates of cumulative incidence, vaccine coverage, and vaccine effectiveness. Results Cumulative incidence of medically attended influenza ranged from 0.8% to 2.8% across sites during 2011/12 and from 2.6% to 6.5% during the 2012/13 season. Stratified by age, incidence ranged from 1.2% among adults 50 years of age and older in 2011/12 to 10.9% among children 6 months to 8 years of age in 2012/13. Cases averted by vaccination ranged from 4 to 41 per 1,000 vaccinees, depending on the study site and year. Conclusions The incidence of medically attended influenza varies greatly by year and even by geographic region within the same year. The number of cases averted by vaccination varies greatly based on overall incidence and on vaccine coverage. PMID:26271827

  16. A 13-hour laboratory school study of lisdexamfetamine dimesylate in school-aged children with attention-deficit/hyperactivity disorder

    Directory of Open Access Journals (Sweden)

    Childress Ann C

    2009-06-01

    Full Text Available Abstract Background Lisdexamfetamine dimesylate (LDX is indicated for the treatment of attention-deficit/hyperactivity disorder (ADHD in children 6 to 12 years of age and in adults. In a previous laboratory school study, LDX demonstrated efficacy 2 hours postdose with duration of efficacy through 12 hours. The current study further characterizes the time course of effect of LDX. Methods Children aged 6 to 12 years with ADHD were enrolled in a laboratory school study. The multicenter study consisted of open-label, dose-optimization of LDX (30, 50, 70 mg/d, 4 weeks followed by a randomized, placebo-controlled, 2-way crossover phase (1 week each. Efficacy measures included the SKAMP (deportment [primary] and attention [secondary] and PERMP (attempted/correct scales (secondary measured at predose and at 1.5, 2.5, 5, 7.5, 10, 12, and 13 hours postdose. Safety measures included treatment-emergent adverse events (AEs, physical examination, vital signs, and ECGs. Results A total of 117 subjects were randomized and 111 completed the study. Compared with placebo, LDX demonstrated significantly greater efficacy at each postdose time point (1.5 hours to 13.0 hours, as measured by SKAMP deportment and attention scales and PERMP (P Conclusion In school-aged children (6 to 12 years with ADHD, efficacy of LDX was maintained from the first time point (1.5 hours up to the last time point assessed (13.0 hours. LDX was generally well tolerated, resulting in typical stimulant AEs. Trial registration Official Title: A Phase IIIb, Randomized, Double-Blind, Multi-Center, Placebo-Controlled, Dose-Optimization, Cross-Over, Analog Classroom Study to Assess the Time of Onset of Vyvanse (Lisdexamfetamine Dimesylate in Pediatric Subjects Aged 6–12 With Attention-Deficit/Hyperactivity Disorder. ClinicalTrials.gov Identifier: NCT00500149 http://clinicaltrials.gov/ct2/show/NCT00500149

  17. 13 CFR 307.12 - Revolving Loan Fund Income.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Revolving Loan Fund Income. 307.12 Section 307.12 Business Credit and Assistance ECONOMIC DEVELOPMENT ADMINISTRATION, DEPARTMENT OF COMMERCE..., RLF Recipients must comply with applicable federal cost principles and audit requirements as found in...

  18. Drug use in college students: a 13-year trend

    Directory of Open Access Journals (Sweden)

    Gabriela Arantes Wagner

    2012-06-01

    Full Text Available OBJECTIVE: To analyze drug use trends among college students in 1996, 2001 and 2009. METHODS: A cross-sectional epidemiological study with a multistage stratified cluster sample with 9,974 college students was conducted in the city of São Paulo, southeastern Brazil. An anonymous self-administered questionnaire was used to collect information on drug use assessed in lifetime, the preceding 12 months and the preceding 30 days. The Bonferroni correction was used for multiple comparisons of drug use rates between surveys. RESULTS: There were changes in the lifetime use of tobacco and some other drugs (hallucinogens [6.1% to 8.8%], amphetamines [4.6% to 8.7%], and tranquilizers [5.7% to 8.2%] from 1996 to 2009. Differences in the use of other drugs over the 12 months preceding the survey were also seen: reduced use of inhalants [9.0% to 4.8%] and increased use of amphetamines [2.4% to 4.8%]. There was a reduction in alcohol [72.9% to 62.1%], tobacco [21.3% to 17.2%] and marijuana [15.0% to 11.5%] use and an increase in amphetamine use [1.9% to 3.3%] in the preceeding 30 days. CONCLUSIONS: Over the 13-year study period, there was an increase in lifetime use of tobacco, hallucinogens, amphetamines, and tranquilizers. There was an increase in amphetamine use and a reduction in alcohol use during the preceding 12 months. There was an increase in amphetamine use during the preceding 30 days.

  19. PODAAC-RSX12-L2B13

    Data.gov (United States)

    National Aeronautics and Space Administration — This dataset contains the RapidScat Level 2B 12.5km Version 1.3 science-quality ocean surface wind vectors, which are intended as a replacement and continuation of...

  20. Leisure Time Physical Inactivity and Sedentary Behaviour and Lifestyle Correlates among Students Aged 13–15 in the Association of Southeast Asian Nations (ASEAN) Member States, 2007–2013

    OpenAIRE

    Karl Peltzer; Supa Pengpid

    2016-01-01

    The aim of this study was to examine the relationship between self-reported leisure time physical inactivity frequency and sedentary behaviour and lifestyle correlates among school children in the Association of Southeast Asian Nations (ASEAN) region. The analysis included 30,284 school children aged 13?15 years from seven ASEAN countries that participated in the Global School-based Student Health Survey (GSHS) between 2007 and 2013. The measure asked about overall physical activity, walking ...

  1. Metacognitive awareness and math anxiety in gifted students

    OpenAIRE

    Hakan Sarıcam; Üzeyir Ogurlu

    2015-01-01

    The basic purpose of this study has been to examine the relationships between metacognitive awareness and maths anxiety in gifted students. The second aim was to compare with gifted and non-gifted students’ metacognitive awareness and maths anxiety levels. The participants were 300 (150 gifted, 150 non-gifted) volunteer secondary school students in Turkey. The mean age of the participants was 12.56 years ranging from 12 to 13 years. For gathering data, the Maths Anxiety Scale for Elementary S...

  2. 49 CFR 392.12-392.13 - [Reserved

    Science.gov (United States)

    2010-10-01

    ... Transportation Other Regulations Relating to Transportation (Continued) FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS DRIVING OF COMMERCIAL MOTOR VEHICLES Driving of Commercial Motor Vehicles §§ 392.12-392.13 [Reserved] ...

  3. Junior High School Students' Ideas about the Shape and Size of the Atom

    Science.gov (United States)

    Cokelez, Aytekin

    2012-01-01

    The concept of the atom is one of the building blocks of science education. Although the concept is a foundation for students' subsequent learning experiences, it is difficult for students to comprehend because of common misconceptions and its abstractness. The purpose of this study is to examine junior high school students' (ages 12-13) ideas…

  4. Students' Understanding of the Nature of Matter and Chemical Reactions--A Longitudinal Study of Conceptual Restructuring

    Science.gov (United States)

    Øyehaug, Anne Bergliot; Holt, Anne

    2013-01-01

    This longitudinal study aims to provide greater insight into how students' understanding of matter and chemical reactions develops over time and how their knowledge structures are restructured. Four case-study students in a Norwegian primary school were followed for two years from age 10-11 to age 12-13. Researchers were responsible for…

  5. Physical performance characteristics of high-level female soccer players 12-21 years of age.

    Science.gov (United States)

    Vescovi, J D; Rupf, R; Brown, T D; Marques, M C

    2011-10-01

    Performance assessment has become an invaluable component of monitoring player development and within talent identification programs in soccer, yet limited performance data are available for female soccer players across a wide age range. The aim of this study was to describe the physical performance characteristics of female soccer players ranging in age from 12 to 21 years. High-level female soccer players (n=414) were evaluated on linear sprinting (36.6 m with 9.1 m splits), countermovement jump (CMJ), and two agility tests. Separate one-way ANOVAs were used to compare performance characteristics between (1) each year of chronological age and (2) three age groups: 12-13 years, n=78, 14-17 years, n=223, and 18-21 years, n=113. Mean linear sprint speed over 9.1 m was similar across all chronological ages, however sprint speed over the final 9.1 m, CMJ height and agility scores improved until approximately 15-16 years. Outcomes from the group data indicated better performance on all tests for the 14-17-year-old group compared with the 12-13-year-old group. Additionally, sprint speed on the second and fourth 9.1 m splits and 36.6 m sprint speed as well as performance on the Illinois agility test was better in the 18-21-year-old group compared with the 14-17-year-old group. The findings from this study indicate that marked improvements of high intensity short duration work occur up until 15-16 years. Smaller gains in performance were observed beyond 16 years of age as evidenced by better performance on 36.6 m sprint speed, several sprint splits and the Illinois agility test in the college aged players (i.e., 18-21-year-old group). © 2010 John Wiley & Sons A/S.

  6. Evaluating Motoric Performance of 10 - 12 Age Group Football Players

    Directory of Open Access Journals (Sweden)

    Mehmet KUMARTAŞLI

    2014-08-01

    Full Text Available The aim of this study is to evaluate motoric perfromance of 10 - 12 age group football players. Akdeniz University tiny football team joined as experiment group and 80. Yıl Cumhuriyet Grammar School football team joined to the study as control group. An exercise programme with educational game format considering physical capacities and develeopment features was applied to the student as 8 weeks, 3 days a week. Standing long jump, flexibilty, 20 m. speed, handgrip strength, arm pull, vert ical jump, 10x5 shuttle run and leg strength tests were applied to the students. Handled data were compared at SPSS 10 statistic programme by using Independent Sample t Test. Students’ lenght and weight measurements were calculated. As a result of measurem ents, there were not found diffrences between experimental and control group’s standing long jump, flexibilty, 20 m. speed, handgrip strength, a vertical jump, 10x5 shuttle run and leg strength tests (p>0,05; but in arm pull test, statistically difference was found (p<0,01. While evaluating the physical performance in cihldren and adolescents, growth process is had to be considered. The results of football players that exercise regularly from small ages at physical and physiologic measurements have an importance according to their age. Performance observed in children is sudden and temporary. There are a few studies in the literature about negative psycological effects of starting trainings in early ages.

  7. 29 CFR 570.12 - Revoked certificates of age.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 3 2010-07-01 2010-07-01 false Revoked certificates of age. 570.12 Section 570.12 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS CHILD LABOR REGULATIONS, ORDERS AND STATEMENTS OF INTERPRETATION Certificates of Age § 570.12 Revoked certificates of age...

  8. A 12-year comparison of students' perspectives on diversity at a Jesuit Medical School.

    Science.gov (United States)

    Mujawar, Imran; Sabatino, Matt; Ray Mitchell, Stephen; Walker, Benjamin; Weissinger, Peggy; Plankey, Michael

    2014-01-01

    Many studies have assessed perspectives of medical students toward institutional diversity, but few of them have attempted to map changes in diversity climate over time. This study aims to investigate changes in diversity climate at a Jesuit medical institution over a 12-year period. In 1999, 334 medical students completed an anonymous self-administered online survey, and 12 years later, 406 students completed a comparable survey in 2011. Chi-square tests assessed the differences in percent responses to questions of the two surveys, related to three identities: gender, race, and sexual orientation. The 1999 versus 2011 samples were 46% versus 49% female, 61% versus 61% Caucasian, and 41% vs. 39% aged 25 years or older. Findings suggested improvements in medical students' perceptions surrounding equality 'in general' across the three identities (pequality and diversity over the past 12 years may have been influenced by a generational acceptance of cultural diversity and, the inclusion of diversity training courses within the medical curriculum. Diversity training related to race and sexual orientation should be expanded, including a follow-up survey to assess the effectiveness of any intervention.

  9. Attitudes to HPV Vaccination among Parents of Children Aged 10 to 13 Years.

    Science.gov (United States)

    Seven, Memnun; Güvenç, Gülten; Şahin, Eda; Akyüz, Aygül

    2015-10-01

    This study aimed to determine the willingness of parents to allow their sons and/or daughters aged 10-13 years to be vaccinated for human papillomavirus (HPV). This was a descriptive study conducted in an elementary school to recruit students' parents into the study. The sample consisted of 368 (69.1%) parents of children aged 10-13 years who were willing to participate in the study as a couple. Questionnaire-based data were collected from the couples. Prior information regarding HPV and vaccination and the opinions of parents of children aged 10-13 about HPV vaccination for their daughter or son. Only 26.9% of mothers and 25.0% of fathers claimed to be aware of HPV, and only 24.5% of mothers and 21.2% of fathers claimed to be aware of its vaccine. If the vaccine were available in Turkey, 21.6% of mothers and 22.4% of fathers would be willing to vaccinate their sons; although the vaccine for girls is available in Turkey, only 14.4% of mothers and 15.5% of fathers were willing to vaccinate their daughters. Few participants reported knowing about the HPV vaccine, while far fewer intended to vaccinate their daughters and sons against the infection. Both males and females should be informed about HPV and its vaccine, and initiatives to increase both awareness and the information of health care professionals should be encouraged. Copyright © 2015 North American Society for Pediatric and Adolescent Gynecology. Published by Elsevier Inc. All rights reserved.

  10. Students-exhibits interaction at a science center

    Science.gov (United States)

    Botelho, Agostinho; Morais, Ana M.

    2006-12-01

    In this study we investigate students' learning during their interaction with two exhibits at a science center. Specifically, we analyze both students' procedures when interacting with exhibits and their understanding of the scientific concepts presented therein. Bernstein's theory of pedagogic discourse (1990, 2000) provided the sociological foundation to assess the exhibit-student interaction and allowed analysis of the influence of the characteristics of students, exhibits, and interactions on students' learning. Eight students (ages 12ndash;13 years of age) with distinct sociological characteristics participated in the study. Several findings emerged from the results. First, the characteristics of the students, exhibits, and interactions appeared to influence student learning. Second, to most students, what they did interactively (procedures) seems not to have had any direct consequence on what they learned (concept understanding). Third, the data analysis suggest an important role for designers and teachers in overcoming the limitations of exhibit-student interaction.

  11. Age at menarche and its socioeconomic determinants among female students in an urban area in Bangladesh.

    Science.gov (United States)

    Islam, Md Serajul; Hussain, Md Altaf; Islam, Saimul; Mahumud, Rashidul Alam; Biswas, Tuhin; Islam, Sheikh Mohammed Shariful

    2017-06-01

    This cross-sectional study aimed to determine the age at menarche and its socioeconomic determinants among urban female students (n=680) in Bangladesh. The mean age of the respondents was 14±1.43years. Majority of the respondents were unmarried (98.4%). The mean age at menarche was 11.6±3.6years, median 12years. Almost one-third (35.7%) of the participants had menarche at the age of 12years. There was no statistically significant difference between age at menarche before and after 12years with the socio-economic characteristics, except education (p=<0.001). In the multivariate model, only higher education was statistically significant predictor of age at menarche. Copyright © 2017 Elsevier B.V. All rights reserved.

  12. 12 CFR 563g.13 - Public disclosure and confidential treatment.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 5 2010-01-01 2010-01-01 false Public disclosure and confidential treatment. 563g.13 Section 563g.13 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY SECURITIES OFFERINGS § 563g.13 Public disclosure and confidential treatment. (a) Any offering circular...

  13. Optimization Technique With Sensitivity Analysis On Menu Scheduling For Boarding School Student Aged 13-18 Using “Sufahani-Ismail Algorithm”

    Science.gov (United States)

    Sudin, Azila M.; Sufahani, Suliadi

    2018-04-01

    Boarding school student aged 13-18 need to eat nutritious meals which contains proper calories, vitality and nutrients for appropriate development with a specific end goal to repair and upkeep the body tissues. Furthermore, it averts undesired diseases and contamination. Serving healthier food is a noteworthy stride towards accomplishing that goal. However, arranging a nutritious and balance menu manually is convoluted, wasteful and tedious. Therefore, the aim of this study is to develop a mathematical model with an optimization technique for menu scheduling that fulfill the whole supplement prerequisite for boarding school student, reduce processing time, minimize the budget and furthermore serve assortment type of food each day. It additionally gives the flexibility for the cook to choose any food to be considered in the beginning of the process and change any favored menu even after the ideal arrangement and optimal solution has been obtained. This is called sensitivity analysis. A recalculation procedure will be performed in light of the ideal arrangement and seven days menu was produced. The data was gathered from the Malaysian Ministry of Education and schools authorities. Menu arranging is a known optimization problem. Therefore Binary Programming alongside optimization technique and “Sufahani-Ismail Algorithm” were utilized to take care of this issue. In future, this model can be implemented to other menu problem, for example, for sports, endless disease patients, militaries, colleges, healing facilities and nursing homes.

  14. Probing the possibility of a C-12/C-13 galactic abundance gradient

    International Nuclear Information System (INIS)

    Hawkins, I.

    1990-01-01

    High S/N (equal to or greater than 500) observations of interstellar CH+ with the 3.0 m telescope were performed at Lick Observatory and with the 4.0 m telescope at CTIO, of the reddened, early-type stars HD 183143, HD 24432, and HD 157038 in an effort to probe the existence of a C-12/C-13 abundance gradient in our Galaxy. Previous very high quality optical observations of interstellar CH+ toward five stars within 1 kpc of the Sun have yielded a precise weighted mean C-12/C-13 isotope ratio of 43 plus or minus 4 (1 sigma) (Hawkins, Jura, and Meyer 1985; Hawkins and Jura 1987). The isotope ratios derived toward four lines of sight in the local ISM are uniform within 12 percent. The similarity among these carbon isotope ratios determined in diffuse clouds possessing different physical conditions precludes the possibility that the CH+ molecule is suffering from isotope selective effects in these regions. The precise C-12/C-13 derivable from high quality observations of (12)CH+ and (13)CH+ provide the unique opportunity to probe the homogeneity of the ISM in a large scale and the history of nucleosynthesis in our Galaxy. Since CH+ seems to be the most sensitive probe of C-12/C-13 in the diffuse ISM, observations toward more distant stars located up to 2.5 kpc from the Sun are the best way to study the possibility of a Galactic (C-12/C-13) abundance gradient. The researcher obtained 4232 angstrom data toward all three of the stars mentioned above, 3957 angstrom data toward HD 183143 and HD 157038, and 3745 angstrom data toward HD 157038. Because of the poorer quality of the HD 24432 spectrum, and its weaker CH+ absorption lines, the satellite (13)CH+ line was not detected, and thus only a lower limit on the C-12/C-13 ratio toward this star was obtained. The results obtained from careful reduction and analysis of the data toward these stars in the Northern and Southern Hemispheres are presented

  15. Age of smoking initiation, tobacco habits and risk perception among primary, middle and high school students in Southern Italy

    Directory of Open Access Journals (Sweden)

    Margherita Ferrante

    2010-09-01

    Full Text Available

    Aim: The aim of this study was to find out at what age children start smoking, as well as their tobacco habits and risk perceptions according to the different school-age groups.

    Methods: A cross-sectional survey was carried out in 2007; it involved around 1700 students of the Catania province, in Southern Italy. The students filled in a structured tobacco questionnaire. They did it anonymously in the classrooms. Main outcome measures were initiation of smoking, smoking habits, number of cigarettes smoked per day and risk perception.

    Results: From the first year of the primary school to the last year of the high school the proportion of daily smokers increased from 0.0% to 11.8% for girls and from 0.8% to 12.7% for boys. For both genders the initiation of smoking habits occurred mainly at age 10 to 13. Finally, girls had a better risk perception.

    Conclusions: Studying young people’s tobacco habits over time gives an understanding of when preventive measures have to be implemented. In order to influence smoking attitudes, these preventive interventions must be put in place before children start experimenting tobacco.

  16. HPV vaccination initiation after the routine-recommended ages of 11–12 in the United States

    Directory of Open Access Journals (Sweden)

    Daniel C. Beachler

    2016-12-01

    Full Text Available Background: Since 2006, routine HPV vaccination has been recommended for females aged 11–12 in the US. However not much is known about the extent of and factors associated with HPV vaccination after the ages of 11–12. Methods: Provider-verified data on 8710 females aged 13–17 were analyzed from the 2013 NIS-Teen survey. 2013 Data was utilized since it was the first year one can fully evaluate the age at vaccination through age 17 for females who could receive the HPV vaccine at age 11. Results: Among HPV vaccinated females who were 17 in 2013, 47% (95% CI=43–50% received their first dose after age 12, and 24% (95% CI=21–26% received their first dose after age 14. The HPV vaccine was more likely to be initiated later than the meningococcal and Tdap vaccines (p<0.05, and later HPV vaccine initiation was more common among those having a more highly educated mother and those not receiving a check-up/well visit between the ages of 11 and 12 in adjusted analyses (p-values<0.05. Females initiating the HPV vaccine late were more likely to not receive three doses (RR=1.90, 95% CI=1.76–2.04. Conclusions: HPV vaccination is commonly initiated after the age of 12 in the US, which could limit the vaccine׳s population-level effectiveness. Keywords: HPV vaccines, Late initiation, Vaccination, NIS-Teen

  17. Relationships between Static and Dynamic Balance and Anticipation Time, Reaction Time in School Children at the Age of 10-12 Years

    Science.gov (United States)

    Bozkurt, Sinan; Erkut, Oya; Akkoç, Orkun

    2017-01-01

    The aim of this study is to investigate the relationship between anticipation time, reaction time and balance characteristics in school children at the age of 10-12 years. 11 males and 12 females, 23 students in total, studying at Istanbul Sancaktepe Ibn-i Sina Elementary School, whose average age was 11.06 years, average height was 142.78 cm and…

  18. Linking data to tobacco control program action among students aged 13-15 in Association of Southeast Asian Nations (ASEAN) member states, 2000-2006.

    Science.gov (United States)

    Sirichotiratana, N; Sovann, S; Aditama, T Y; Krishnan, M; Kyaing, N N; Miguel-Baquilod, M; Hai, P T; Sinha, D N; Warren, C W; Jones, N R

    2008-12-01

    The Association of Southeast Asian Nations (ASEAN) has made tobacco use prevention a primary health issue. All ASEAN countries except Indonesia have ratified the World Health Organization Framework Convention on Tobacco Control (WHO FCTC), the world's first public health treaty on tobacco control. Global Youth Tobacco Survey (GYTS) data were collected from representative samples of students in school grades associated with ages 13-15 in Cambodia, Indonesia, Laos (Vientiane), Malaysia, Myanmar, Philippines, Singapore, Thailand and Vietnam (Hanoi). Current cigarette smoking ranged from less than 5% (Vietnam and Cambodia) to 20.2% in Malaysia. Current use of tobacco products other than cigarettes was less than 10% in all countries. Boys were significantly more likely than girls to smoke cigarettes or use other tobacco products. Exposure to second-hand smoke in public places was greater than 50%, direct pro-tobacco advertising exposure was greater than 75% and over 10% of students were exposed to indirect advertising. Over 60% of students who currently smoked cigarettes wanted to stop, but 80% who tried to quit in the year prior to the survey failed. Efforts to reduce the current and projected harm caused by tobacco use in the ASEAN countries are urgently needed. ASEAN countries need to expand their national comprehensive tobacco prevention and control programs and enforce those laws already passed. Without this effort little reduction can be expected in the burden of chronic diseases and tobacco-related mortality.

  19. Oral hygiene, periodontal status and treatment needs among 12-year-old students, Castro, Chile, 2014.

    Directory of Open Access Journals (Sweden)

    Mariana Wauters

    2015-02-01

    Full Text Available The present study aims to determine the level of oral hygiene, periodontal status and treatment needs, indicating if there are differences between men and women, in 12-year-old students from Castro, Los Lagos region, during March and April of 2014. A cross-sectional study was carried out. A total of 242 12-year-old students from municipal and subsidized private schools in Castro were selected through a stratified random sample representative of each school. Students were evaluated by a calibrated examiner to determine the Simplified Oral Hygiene Index (OHI-S and the Community Periodontal Index of Treatment Needs (CPITN. Data were transferred to a Microsoft Excel spreadsheet and statistically analyzed to calculate the amount and percentage of the variables. Mann-Whitney U-test was used for comparison between genders. From the total, 59.5% of the students have regular hygiene. Also, 86.4% of the assessed adolescents have gingivitis and 13.6% of them have periodontitis. The periodontal treatment need indicates that 58% of the students require oral hygiene instructions and scaling. No statistically significant differences were found for gender. There is a higher prevalence of periodontal diseases associated with regular oral hygiene than the regional and national reference in 12-year-old adolescents in Castro. Then, it is necessary to teach and promote specific public health strategies based on epidemiological data

  20. Influence of the level of speed-strength preparedness on the agility of volleyball players 1213 years old

    Directory of Open Access Journals (Sweden)

    Oleg Shevchenko

    2018-02-01

    Full Text Available Purpose: determine the impact level of indicators of speed-strength preparedness for the agility of young volleyball players 1213 years. Material & Methods: analysis of scientific and methodological literature, pedagogical testing of speed-strength qualities and agility, pedagogical experiment, methods of mathematical statistics. The study involved 25 volleyball players aged 1213 years, training in the basic training group of the second year of training of the sports club "Lokomotiv" in Kharkov. Young athletes were divided into an experimental – 13 people and a control –12 volleyball team. Results: after the introduction of the experimental methodology, a link was found between the level of speed-strength abilities and the agility of volleyball players. Conclusion: the positive influence of development of speed-strength qualities on indicators of agility of volleyball players that is necessary for selection of means and methods in training process of young athletes is proved.

  1. PREDICTIVE CONTRIBUTION OF MORPHOLOGICAL CHARACTERISTICS AND MOTOR ABILITIES ON THE RESULT OF RUNNING THE 60m HURDLES IN BOYS AGED 12 - 13 YEARS

    Directory of Open Access Journals (Sweden)

    Zana Bujak

    2014-06-01

    Full Text Available The subject of this study is to determine predictive contributions of morphological characteristics and motor abilities on the 60m hurdles, with an aim to form a group of easily applicable field tests so as to identify boys who are talented in hurdl e racing . The subject sample of this study was comprised of 60 boys aged 12 - 13. The variable sample consisted of a 60m hurdles criterion variable and a set of 13 p re dictor variables comprising of morphological characteristics, speed - strength abilities and the subjects' coordina tion qualities . Applying the regression analysis , the predictive contribution of a complete variable s et of morpholog ical characteristics and motor abilities was determined as an above average statistical significance, influencing 60m hurdle outcome. The greatest individual statistically significant predictive contribution was achieved by the variables of speed - strength quality assessment: 20m flying start r ace result with a standing long jump; and only one variable from the field of morphological characteristics: the shin length. The results support the following conclusion: the two specific variables of speed - strength quality, and 20m flying start race results along with standing long jump , can be relevant predictors of successful outcome in hurdle races .

  2. Kaberla kalmistu 12.-13. sajandi klaashelmed / Irita Kallis

    Index Scriptorium Estoniae

    Kallis, Irita

    2010-01-01

    Kaberla kalmistult leitud klaashelmestest, põhitähelepanu on 12.-13. saj. matuste inventari hulka kuulunud leiumaterjalil. Ülevaade helmeste esimemisvariatsioonidest helmekeedes, võimalikust tähendusest ja väärtusest ning samatüübiliste helmeste dateeringutest naaberaladel

  3. Prevalence, demographic and psychosocial correlates for school truancy among students aged 13-15 in the Association of Southeast Asian Nations (ASEAN) member states.

    Science.gov (United States)

    Pengpid, Supa; Peltzer, Karl

    2017-11-01

    Truancy among adolescents may negatively affect the achievement of academic goals. The aim of the study was to investigate the prevalence and correlates of school truancy in the Association of Southeast Asian Nations (ASEAN) member states. The analysis included 28 419 school children aged 13-15 years from seven ASEAN member states that participated in the Global School-based Student Health Survey (GSHS) between 2007 and 2013. The overall prevalence of past 30 day truancy across six ASEAN countries (excluding Brunei) was 24.8%; ranging from below 20% in Myanmar, Thailand, and Vietnam to more than 30% in Brunei Darussalam, Indonesia, and the Philippines. In multivariable logistic regression analysis, socio-demographic factors (older age, being male, the experience of hunger), externalising behaviour (tobacco use, alcohol use, having been in a physical fight, being bullied, having sustained an injury), and lack of protective social-familial factors (lack of peer support and lack of parental or guardian support) were found to be associated with truancy. High rates of truancy were found in ASEAN member states calling for interventions aimed to reduce truancy considering identified associated factors.

  4. SRS-sensor 13C/12C isotops measurements for detecting Helicobacter Pylori

    Science.gov (United States)

    Grishkanich, Aleksandr; Chubchenko, Yan; Elizarov, Valentin; Zhevlakov, Aleksandr; Konopelko, Leonid

    2018-02-01

    We developed SRS-sensor 13C/12C isotops measurements detecting Helicobacter Pylori for medical diagnostics of human health. Measuring of absolute 13C/12C isotope amount ratios allows to explore the topical problems of the modern world, alcoholic beverages and tobacco, medical diagnostics of human health. SRS method is used to measure the ratio of carbon isotopes in the exhaled carbon dioxide, which is used to diagnose the human infection of Helicobacter pylori and the influence of the Helicobacter pylori bacterium on the occurrence of gastritis, gastric and duodenal ulcers. A method for the analysis of human infection with Helicobacter pylori was developed on the basis of measurements of the ratio of 13C / 12C carbon isotopes in human exhaled air with a high level of measurement accuracy. The article reviews the work in the field of provision comparability of absolute 13C/12C isotope amount ratios in the environment and food. The analysis of the technical and metrological characteristics of traditional and perspective instruments for measuring isotope ratios is presented. The provision of comparability of absolute 13C/12C isotope amount ratios is carried by gravimetrically prepared reference standards. The key features and emerging issues are discussed.

  5. Academic Training Lectures | The Cosmological Constant Problem | 12-13 November

    CERN Multimedia

    2015-01-01

    Please note that the next series of Academic Training Lectures will take place on the 12 and 13 November. The lectures will be given by Antonio Padilla (University of Nottingham, UK). The Cosmological Constant Problem (1/2) on Thursday, 12 November from 11:00 a.m. to 12:30 p.m. https://indico.cern.ch/event/453187/ The Cosmological Constant Problem (2/2) on Friday, 13 November from 11:00 a.m. to 12:30 p.m. https://indico.cern.ch/event/453188/ at CERN, Council Chamber (503-1-001)  Description: I will review the cosmological constant problem as a serious challenge to our notion of naturalness in Physics. Weinberg’s no go theorem is worked through in detail. I review a number of proposals possibly including Linde's universe multiplication, Coleman's wormholes, the fat graviton, and SLED, to name a few. Large distance modifications of gravity are also discussed, with causality considerations pointi...

  6. Legal-Age Students' Provision of Alcohol to Underage College Students: An Exploratory Study

    Science.gov (United States)

    Brown, Richard L.; Matousek, Therese A.; Radue, Mary B.

    2009-01-01

    Objective: The authors investigated the magnitude and cultural context of legal-age university students' provision of alcohol to underage students and how such alcohol provision might be deterred. Participants: 130 legal-age students at a midwestern university in the United States were randomly selected. Methods: The authors assessed 16 focus…

  7. 13C/12C ratios in human urine concrementes

    International Nuclear Information System (INIS)

    Hoefs, J.; Armbruster, T.

    1978-01-01

    Oxalate, uric acid, and phosphate stones have been analyzed for their carbon isotope composition. The oxalate stones show delta 13 C values between -17.0 and -19.5 pro mille, the uric acid stones between -14.9 and -19.4 pro mille, and the phosphate stones between -13.0 and -23.9 pro mille. It is proposed that endogenic rather than exogenic sources are responsible for the 13 C/ 12 C ratios of the stones. The isotopic composition of the phosphate stones seems to be influenced primarily by bacterial activity. (orig.) [de

  8. Conductas sexuales en adolescentes de 12 a 17 años de Andalucía Sexual behavior in adolescents aged 12 to 17 in Andalusia (Spain

    Directory of Open Access Journals (Sweden)

    José Rodríguez Carrión

    2012-12-01

    Full Text Available Objetivo: Describir los comportamientos y prácticas sexuales de los y las adolescentes de 12 a 17 años de edad en Andalucía (2007-2008. Método: La información se recogió mediante un cuestionario autocumplimentado, anónimo y voluntario, aplicado a una muestra aleatoria estratificada de 2.225 estudiantes de enseñanza secundaria obligatoria (ESO, en todas las provincias de Andalucía. Resultados: 388 adolescentes (18,2% refirieron haber mantenido relaciones sexuales con penetración, sin diferencias estadísticamente significativas entre chicos (18,0% y chicas (18,5%. Sí se encontró una mayor precocidad de los chicos en la edad de su inicio (14 años frente a 14,4, comienzo en la masturbación (11,3 años frente a 12,7, sexo oral (13,8 años frente a 14,6 y masturbación a la pareja (13,7 años frente a 14,4. También se hallaron diferencias en el número de parejas sexuales (2 los chicos y 1,6 las chicas, mantener relaciones sexuales en la actualidad (menos ellos, haber mantenido relaciones sexuales a través de Internet (más los chicos, haber usado un anticonceptivo en el primer coito (menos los chicos y conocimiento del doble método y de las infecciones de transmisión sexual (mayor en las chicas. Conclusiones: Uno de cada seis estudiantes de ESO de Andalucía ha mantenido relaciones sexuales con penetración; de ellos, dos tercios las mantienen en la actualidad, sobre todo las chicas. Valorado junto con un escaso conocimiento (menos del 50% del doble método y de las infecciones de transmisión sexual, nos lleva a considerar necesario incluir la educación sexual como específica dentro del currículo de la enseñanza secundaria.Objective: To describe sexual behavior and activity among adolescents aged 12-17 years old in Andalusia (Spain in 2007-2008. Method: The data for this study were collected through an anonymous questionnaire distributed to a stratified random sample of 2,225 secondary school students in Andalusia

  9. Multi-cluster dynamics in CΛ13 and analogy to clustering in 12C

    Directory of Open Access Journals (Sweden)

    Y. Funaki

    2017-10-01

    Full Text Available We investigate structure of CΛ13 and discuss the difference and similarity between the structures of C12 and CΛ13 by answering the questions if the linear-chain and gaslike cluster states, which are proposed to appear in C12, survives, or new structure states appear or not. We introduce a microscopic cluster model called, Hyper-Tohsaki–Horiuchi–Schuck–Röpke (H-THSR wave function, which is an extended version of the THSR wave function so as to describe Λ hypernuclei. We obtained two bound states and two resonance (quasi-bound states for Jπ=0+ in CΛ13, corresponding to the four 0+ states in C12. However, the inversion of level ordering between the spectra of C12 and CΛ13, i.e. that the 03+ and 04+ states in CΛ13 correspond to the 04+ and 03+ states in C12, respectively, is shown to occur. The additional Λ particle reduces sizes of the 02+ and 03+ states in CΛ13 very much, but the shrinkage of the 04+ state is only a half of the other states, in spite of the fact that attractive Λ-N interaction makes nucleus contracted so much when the Λ particle occupies an S-orbit. In conclusion, the Hoyle state becomes quite a compact object with BeΛ9+α configuration in CΛ13 and is no more gaslike state composed of the 3α clusters. Instead, the 04+ state in CΛ13, coming from the C12(03+ state, appears as a gaslike state composed of α+α+Λ5He configuration, i.e. the Hoyle analog state. A linear-chain state in a Λ hypernucleus is for the first time predicted to exist as the 03+ state in CΛ13 with more shrunk arrangement of the 3α clusters along z-axis than the 3α linear-chain configuration realized in the C12(04+ state. All the excited states are shown to appear around the corresponding cluster-decay threshold, reflecting the threshold rule.

  10. IMPROVED LINE DATA FOR THE SWAN SYSTEM 12C13C ISOTOPOLOGUE

    International Nuclear Information System (INIS)

    Ram, Ram S.; Brooke, James S. A.; Bernath, Peter F.; Sneden, Christopher; Lucatello, Sara

    2014-01-01

    We present new, accurate predictions for rotational line positions, excitation energies, and transition probabilities of the 12 C 13 C isotopologue Swan d 3 Π-a 3 Π system 0-0, 0–1, 0–2, 1–0, 1–1, 1–2, 2–0, 2–1, and 2–2 vibrational bands. The line positions and energy levels were predicted through new analyses of published laboratory data for the 12 C 13 C lines. Transition probabilities were derived from recent computations of transition dipole moments and related quantities. The 12 C 13 C line data were combined with similar data for 12 C 2, reported in a companion paper, and applied to produce synthetic spectra of carbon-rich metal-poor stars that have strong C 2 Swan bands. The matches between synthesized and observed spectra were used to estimate band head positions for a few of the 12 C 13 C vibrational bands and to verify that the new computed line data match observed spectra. The much weaker C 2 lines of the bright red giant Arcturus were also synthesized in the band head regions

  11. Age at menarche in Polish University students born before, during and after World War II: Economic effects.

    Science.gov (United States)

    Liczbińska, Grażyna; Czapla, Zbigniew; Piontek, Janusz; Malina, Robert M

    2018-02-01

    Although the relationships between economic conditions and biological variables over the past two centuries in Poland are reasonably well-documented, the influence of economic and political disruptions, including nutritional privation, during the years immediately before, during and shortly after World War II (WWII) has received less attention. This paper considers the association between age at menarche and body size of university students born before, during and after WWII and father's level of education, a commonly used indicator of family economic status in Poland. Subjects were 518 university students surveyed between 1955 and 1972, birth years 1931 through 1951. The sample was divided into three birth cohorts: before (n=237), during (n=247) and after (n=34) WWII. Age at menarche was compared among birth cohorts, and by weight status and father's level of education. Age at menarche increased slightly but significantly among women born during WWII (14.4 yrs) compared to those born before (14.2 yrs) and after (13.9 yrs) the war. Controlling for year of birth and age of the student, age at menarche was significantly earlier in overweight (13.42±0.35 yrs) than in normal weight (14.33±0.06 yrs) and thin (14.54±0.21 yrs) women. Adjusted mean ages at menarche in small samples of overweight women did not differ by father's level of education, and were earlier than corresponding ages of thin and normal weight women. Adjusted mean ages at menarche did not differ between thin and normal weight women with fathers having primary or no education, but were slightly later in thin than in normal weight women with fathers having a vocational, secondary or higher education. Although age at menarche was associated with father's level of education, young adult weight status was a somewhat more important correlate. Copyright © 2017 Elsevier B.V. All rights reserved.

  12. Ethane's 12C/13C Ratio in Titan: Implications for Methane Replenishment

    Science.gov (United States)

    Jennings, Donald E.; Nixon, C. A.; Romani, P. N.; Bjoraker, G. L.; Sada, P. V.; Lunsford, A. W.; Boyle, R. J.; Hesman, B. E.; McCabe, G. H.

    2009-01-01

    As the .main destination of carbon in the destruction of methane in the atmosphere of Titan, ethane provides information about the carbon isotopic composition of the reservoir from which methane is replenished. If the amount of methane entering the atmosphere is presently equal to the amount converted to ethane, the 12C/13C ratio in ethane should be close to the ratio in the reservoir. We have measured the 12C/13C ratio in ethane both with Cassini CIRS(exp 1) and from the ground and find that it is very close to the telluric standard and outer planet values (89), consistent with a primordial origin for the methane reservoir. The lower 12C/13C ratio measured for methane by Huygens GCMS (82.3) can be explained if the conversion of CH4 to CH3 (and C2H6) favors 12C over 13C with a carbon kinetic isotope effect of 1.08. The time required for the atmospheric methane to reach equilibrium, i.e., for replenishment to equal destruction, is approximately 5 methane atmospheric lifetimes.

  13. Physical activity level of school children of age 10-13 years

    OpenAIRE

    Ronghe, Dr. Rashmi N; Gotmare, Dr. Neha A; Kawishwar, Dr. Shraddha

    2016-01-01

    Aim: To assess physical activity level of school children of age 10-13 years.Objectives: To assess and grade physical activity level in children of age 10-13 years using Physical Activity Questionnaire for Children (PAQ-C) classified into: Light Physical activity; Moderate Physical activity; Moderate to vigorous Physical activity and High Physical activity.Methodology: This is Questionnaire based survey study which was conducted on 100 school going children of 10-13 years who were present on ...

  14. Corrected Age for Preemies

    Science.gov (United States)

    ... Our Sponsors Ages & Stages Ages & Stages Ages and Stages Prenatal Baby (0-12 mos.) Toddler 1-3yrs. Preschool 3-5yrs Grade School 5-12yrs. Teen 12- ... the Word Shop AAP Find a Pediatrician Ages & Stages Prenatal Baby ... Gradeschool Teen Young Adult Healthy Children > Ages & Stages > ...

  15. Selected atherosclerosis risk factors in youth aged 13–15 years 

    Directory of Open Access Journals (Sweden)

    Agnieszka Michalska

    2012-09-01

    Full Text Available Introduction:The high frequency of cases of circulatory system conditions in Europe and other countries around the world requires scientific research to define risk factors of early atherosclerotic changes. The aim of the present study was to define which students are at danger of developing atherosclerosis by means of measuring cholesterol and triglyceride levels in blood as well as defining the correlation between atherosclerosis risk factors and arterial blood pressure, physical fitness and efficiency of the subjects.Material/Methods:The research covered 167 students of Public Junior High School ¹1 in Biala Podlaska aged 13–15 years. Accutrend GCT was employed to define the levels of total cholesterol and triglycerides in the screen test. Those students who were found to have increased values of biochemical parameters of capillary blood were subjected to additional blood tests aiming to define complete lipid profile of venous blood. The blood pressure in subjects was tested three times. The Moderate-to-Vigorous Physical Activity (MVPA test, suggested by American authors, was employed to define physical activity in subjects. EUROFIT was employed to define physical efficiency.Results:Among the 167 subjects there were found 42 students (25.1�20whose lipid level in capillary blood proved to be increased. Full lipid profile tests proved that 16 students (9.6�20had increased blood lipid levels; those subjects constituted the risk group. Subjects in the risk group were characterized by lower levels of physical activity and physical efficiency compared to subjects with normal blood lipid level. Moreover, the frequency of hypertension was greater in risk group subjects compared to subjects with normal blood lipid levels.Inferences:Students diagnosed with atherosclerosis risk factors require observation and early prophylactics by adopting habits of healthy physical activity.

  16. The Relation of Age, Gender, Ethnicity, and Risk Behaviors to Self-Esteem among Students in Nonmainstream Schools

    Science.gov (United States)

    Connor, Jennifer M.; Poyrazli, Senel; Ferrer-Wreder, Laura; Grahame, Kamini Maraj

    2004-01-01

    This cross-sectional study investigated self-esteem in relation to age, gender, ethnicity, and risk behaviors among a sample of nonmainstream students. Participants were 149 students in the 6th to 12th grades from two non-mainstream schools (one charter and one alternative school). Self-esteem and youth risk behaviors were determined by using a…

  17. The Perceived Impact of Playing Music while Studying: Age and Cultural Differences

    Science.gov (United States)

    Kotsopoulou, Anastasia; Hallam, Susan

    2010-01-01

    Rating scale questionnaires were administered to 600 students in three age groups, 12-13, 15-16 and 20-21 from Japan, the UK, Greece and the USA. The questionnaires explored the extent of playing music while studying, the kinds of tasks when music was played, the perceived effects of music on studying, the characteristics and types of music played…

  18. H12CN and H13CN excitation analysis in the circumstellar outflow of R Sculptoris

    Science.gov (United States)

    Saberi, M.; Maercker, M.; De Beck, E.; Vlemmings, W. H. T.; Olofsson, H.; Danilovich, T.

    2017-03-01

    Context. The 12CO/13CO isotopologue ratio in the circumstellar envelope (CSE) of asymptotic giant branch (AGB) stars has been extensively used as the tracer of the photospheric 12C/13C ratio. However, spatially-resolved ALMA observations of R Scl, a carbon rich AGB star, have shown that the 12CO/13CO ratio is not consistent over the entire CSE. Hence, it can not necessarily be used as a tracer of the 12C/13C ratio. The most likely hypothesis to explain the observed discrepancy between the 12CO/13CO and 12C/13C ratios is CO isotopologue selective photodissociation by UV radiation. Unlike the CO isotopologue ratio, the HCN isotopologue ratio is not affected by UV radiation. Therefore, HCN isotopologue ratios can be used as the tracer of the atomic C ratio in UV irradiated regions. Aims: We aim to present ALMA observations of H13CN(4-3) and APEX observations of H12CN(2-1), H13CN(2-1, 3-2) towards R Scl. These new data, combined with previously published observations, are used to determine abundances, ratio, and the sizes of line-emitting regions of the aforementioned HCN isotopologues. Methods: We have performed a detailed non-LTE excitation analysis of circumstellar H12CN(J = 1-0, 2-1, 3-2, 4-3) and H13CN(J = 2-1, 3-2, 4-3) line emission around R Scl using a radiative transfer code based on the accelerated lambda iteration (ALI) method. The spatial extent of the molecular distribution for both isotopologues is constrained based on the spatially resolved H13CN(4-3) ALMA observations. Results: We find fractional abundances of H12CN/H2 = (5.0 ± 2.0) × 10-5 and H13CN/H2 = (1.9 ± 0.4) × 10-6 in the inner wind (r ≤ (2.0 ± 0.25) ×1015 cm) of R Scl. The derived circumstellar isotopologue ratio of H12CN/H13CN = 26.3 ± 11.9 is consistent with the photospheric ratio of 12C/13C 19 ± 6. Conclusions: We show that the circumstellar H12CN/H13CN ratio traces the photospheric 12C/13C ratio. Hence, contrary to the 12CO/13CO ratio, the H12CN/H13CN ratio is not affected by UV

  19. Relation of Obesity and Menarche Age among

    Directory of Open Access Journals (Sweden)

    Shila Berenjy

    2008-12-01

    Full Text Available Objective: The aim of this study was to investigate the relation between overweight and obesity among adolescent students and age of menarche.Materials and Methods: In a cross-sectional study 399 urban adolescent girls aged 11-14 years old were selected from schools of Kermanshah city in Iran. Anthropometric examinations including, triceps skin fold (TSF, mid arm circumference (MAC, body fat percentage (BF %, were measured and information on age of menarch and student’s demographics were collected. Results: The results showed that age, body mass index (BMI and menarche age were:12.63+1.01 year, 17.71+2.94 kg/m2 and 12.16+1.18 year respectively. Prevalence of overweight in respondents was 23.2%, however; prevalence of obesity was 23.2% for 11 years old , 22.4% for12 years olds , 24% of 13 years old  and 23.5% of 14 years old. Conclusion: There was a reverse relation  between BMI and age of menarche, however; it was not significant (p>0.1. This study suggests a high prevalence of obesity and relation between BMI and anthropometric parameters in adolesent girls.

  20. 13C NMR and relaxation studies of the nanomagnet Mn12-acetate

    Science.gov (United States)

    Achey, Randall M.; Kuhns, Philip L.; Reyes, Arneil P.; Moulton, William G.; Dalal, Naresh S.

    2001-08-01

    The nanomagnet [Mn12O12(CH3COO)16(H2O)4].2CH3COOH.4H2O, also known as Mn12, has been synthesized with 13C labeling at the CH3 groups, and investigated by 13C NMR at fields up to 23 T. Using oriented samples, it is possible to resolve four distinct 13C peaks at room temperature, located on both sides of the unshifted Larmor frequency. These peaks were assigned to the four hyperfine-shifted, magnetically inequivalent sets of 13CH3 groups in the Mn12 lattice, based on a comparison with the crystal structure and point-dipole and spin-density calculations. These results establish that the unpaired electron spin density of the S=10 system in this cluster extends over the entire molecular framework, not just the core. These results are discussed in relationship to inelastic neutron scattering measurements. The temperature and field dependence of the 13C nuclear-spin-lattice-relaxation time T1 on the least shifted peak was measured. A single weakly field-dependent minimum at about 60 K is observed in the temperature dependence of the measured T1. The relaxation mechanism responsible for the T1 minimum is ascribed mainly to hindered rotation of the methyl group of the acetate ligand at higher temperature, and to electronic spin fluctuations at lower temperature.

  1. The good student is more than a listener - The 12+1 roles of the medical student.

    Science.gov (United States)

    Karakitsiou, D E; Markou, A; Kyriakou, P; Pieri, M; Abuaita, M; Bourousis, E; Hido, T; Tsatsaragkou, A; Boukali, A; de Burbure, C; Dimoliatis, I D K

    2012-01-01

    The process of medical education, particularly in the fast evolving new era of medical metaschools, is a broad and complex issue. Harden & Crosby claimed that a good teacher is more than a lecturer, and identified 12 roles that certify a good and capable teacher. However, this is only half the truth: the good student is more than a listener. Teaching-and-learning is not simply a one-way process, and, as medical students are not children, the relationship between teacher and students involves andragogy rather than pedagogy. We therefore propose the 12+1 roles of the student. SUMMARY OF WORK: The Harden & Crosby paper was distributed in a class of 90 third year Ioannina University medical students, who were asked to think about the student's roles. A small discussion group brainstormed ideas, which were then refined further by the authors. 12+1 roles of the good medical student were produced and grouped into six areas: information receiver, in lectures and clinical context; role model in learning, in class, with the added subarea of comparative choice of role models; teaching facilitator and teacher's mentor; teacher's assessor and curriculum evaluator; active participator and keeping-up with curriculum; resource consumer/co-creator and medical literature researcher. The ideal student should fulfil the majority if not all of these complementary roles. These 12+1 student's roles are complementary to the 12 roles of the teacher and help reshaping our understanding of today's medical education process.

  2. Does Year 12 French Improve Proficiency? Student Views and Student Performance.

    Science.gov (United States)

    Martin, Anne L.

    1994-01-01

    Discusses the attitudes of students concerning the benefit of Year 12 foreign language courses to the development of their oral and aural proficiency in the target language, i.e., French. While most students felt that their ability to speak and understand spoken French had improved as a result of the course, some expressed dissatisfaction with…

  3. Predictors of influenza vaccination in the U.S. among children 9-13years of age.

    Science.gov (United States)

    Imburgia, Teresa M; Hendrix, Kristin S; Donahue, Kelly L; Sturm, Lynne A; Zimet, Gregory D

    2017-04-25

    U.S. estimates of seasonal influenza (flu) vaccine uptake in 2014-2015 were 62% for 5-12year olds, dropping to 47% for 13-17year olds. The Healthy People 2020 goal for these age groups is 80%. It is important to understand factors associated with influenza vaccination, especially for those ages where rates begin to decline. The objective of this study was to identify factors associated with influenza vaccination acceptance in 9-13year old children. An online U.S. survey of mothers of children aged 9-13 assessed children's influenza vaccine uptake in the previous season, healthcare utilization, sociodemographics, and vaccine attitudes. Multivariable logistic regression identified independent predictors of influenza vaccine status. There were 2363 respondents (Mean age=38years old). Referent children were 57% female and 66% non-minority race/ethnicity with a mean age of 10.6years. By maternal report, 59% of children had received an influenza vaccine in the previous season. Predictors of influenza vaccine uptake included a recommendation or strong recommendation from a health care provider, seeing a health care provider in the past year, positive attitudes regarding the influenza vaccine, and being a minority race. Child gender, age, insurance coverage, and whether the child had a regular healthcare provider were not associated with influenza vaccine uptake (p=n.s.). This sample reported overall rates of influenza vaccine uptake similar to national surveillance data, but still lower than national goals. Provider recommendations along with health attitudes and seeing a health care provider were associated with vaccine uptake. Promising interventions may include more directive physician messaging for influenza vaccine uptake in youth, encouraging more regular well-child visits during the adolescent years, and promoting influenza vaccination at alternative sites. Copyright © 2017 Elsevier Ltd. All rights reserved.

  4. Liaison amid problem behavior and traumatic dental injury among children aged 12-15 years in Bhopal

    Directory of Open Access Journals (Sweden)

    Naveen S Yadav

    2015-01-01

    Full Text Available Introduction: Liaison amid problem behavior and traumatic dental injury among children aged 13-15 years are consequential due to multifactorial dental, orofacial skeletal, psycosocial behavior pattern. The probable etiology is been equated overjet; inadequate lip coverage is the major etiological factors accountable for traumatic dental injuries. Aims: The aim was to assess the relationship of problem behavior, type of lip coverage, and the size of overjet with the traumatic dental injury among children aged 12-15 years. Materials and Methods: A cross-sectional study was conducted among 200 children aged 12-15 years in Bhopal, India. Data were collected through clinical examinations in children and interviews with parents. Traumatic injuries were recorded according to Garcia-Goday′s classification. The informant - rated version of the strengths and difficulties questionnaire was used to identify problems behavior. Results: About 16.4% subjects had more than 5 mm overjet, and 20.4% subjects had inadequate lip coverage. The largest number of injuries were presented by 15-year-old children (43.90% followed by 14 and 13 years old children. The traumatic dental injury showed 6.8% association with problem behavior, age, sex, type of lip coverage, and the size of overjet. Conclusion: Problem behavior along with the type of lip coverage and the size of overjet plays a role in the occurrence of traumatic dental injury.

  5. WNT Stimulation Dissociates a Frizzled 4 Inactive-State Complex with Gα12/13.

    Science.gov (United States)

    Arthofer, Elisa; Hot, Belma; Petersen, Julian; Strakova, Katerina; Jäger, Stefan; Grundmann, Manuel; Kostenis, Evi; Gutkind, J Silvio; Schulte, Gunnar

    2016-10-01

    Frizzleds (FZDs) are unconventional G protein-coupled receptors that belong to the class Frizzled. They are bound and activated by the Wingless/Int-1 lipoglycoprotein (WNT) family of secreted lipoglycoproteins. To date, mechanisms of signal initiation and FZD-G protein coupling remain poorly understood. Previously, we showed that FZD6 assembles with Gαi1/Gαq (but not with Gαs, Gαo and Ga12/13), and that these inactive-state complexes are dissociated by WNTs and regulated by the phosphoprotein Dishevelled (DVL). Here, we investigated the inactive-state assembly of heterotrimeric G proteins with FZD4, a receptor important in retinal vascular development and frequently mutated in Norrie disease or familial exudative vitreoretinopathy. Live-cell imaging experiments using fluorescence recovery after photobleaching show that human FZD4 assembles-in a DVL-independent manner-with Gα12/13 but not representatives of other heterotrimeric G protein subfamilies, such as Gαi1, Gαo, Gαs, and Gαq The FZD4-G protein complex dissociates upon stimulation with WNT-3A, WNT-5A, WNT-7A, and WNT-10B. In addition, WNT-induced dynamic mass redistribution changes in untransfected and, even more so, in FZD4 green fluorescent protein-transfected cells depend on Gα12/13 Furthermore, expression of FZD4 and Gα12 or Gα13 in human embryonic kidney 293 cells induces WNT-dependent membrane recruitment of p115-RHOGEF (RHO guanine nucleotide exchange factor, molecular weight 115 kDa), a direct target of Gα12/13 signaling, underlining the functionality of an FZD4-Gα12/13-RHO signaling axis. In summary, Gα12/13-mediated WNT/FZD4 signaling through p115-RHOGEF offers an intriguing and previously unappreciated mechanistic link of FZD4 signaling to cytoskeletal rearrangements and RHO signaling with implications for the regulation of angiogenesis during embryonic and tumor development. Copyright © 2016 by The American Society for Pharmacology and Experimental Therapeutics.

  6. 7 CFR 318.13-12 - Movement by the U.S. Department of Agriculture.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Movement by the U.S. Department of Agriculture. 318.13-12 Section 318.13-12 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE STATE OF HAWAII AND TERRITORIES QUARANTINE...

  7. Isotopic effects in elastic and inelastic 12,13C + 16,18O scattering

    Directory of Open Access Journals (Sweden)

    A. T. Rudchik

    2010-09-01

    Full Text Available New angular-distribution data of 13С + 18О elastic and inelastic scattering at the energy Elab(18O = 105 MeV were obtained for the transitions to the ground and excited states 3.088 MeV(1/2+, 3.555 MeV (1/2-, 3.854 MeV (5/2+ of 13С and 1.982 MeV (2+, 3.555 MeV (4+, 3.921 MeV (2+, 4.456 MeV (1-, 5.098 MeV (3-, 5.260 MeV (2+ of 18O. These and the 13С + 18О elastic scattering data taken from the literature at the energies Elab(18O = 15, 20, 24, 31 MeV and Elab(13С = 24 MeV were analysed within the optical model and coupled-reaction-channels methods. Sets of 13С + 18О optical potential parameters and their energy dependence were obtained. Contributions of potential scattering and transfer reactions to the elastic and inelastic channels of 13С + 18О scattering were studied. Isotopic differences (effects in 12, 13С + 16, 18О optical potential parameters were investigated.

  8. Mixed Age Grouping for Gifted Students.

    Science.gov (United States)

    Bouchard, Lorraine L.

    1991-01-01

    The application of mixed-age grouping at Rainard School (Houston, Texas), a private school for gifted students, is described. Discussed are advantages (such as encouraging cooperation instead of competition), the optimum age spread, the differentiated and individualized curriculum, parent reactions, teacher reactions, and difficulties. (DB)

  9. The relation of age, gender, ethnicity, and risk behaviors to self-esteem among students in nonmainstream schools.

    Science.gov (United States)

    Connor, Jennifer M; Poyrazli, Senel; Ferrer-Wreder, Laura; Grahame, Kamini Maraj

    2004-01-01

    This cross-sectional study investigated self-esteem in relation to age, gender, ethnicity, and risk behaviors among a sample of nonmainstream students. Participants were 149 students in the 6th to 12th grades from two nonmainstream schools (one charter and one alternative school). Self-esteem and youth risk behaviors were determined by using a modified version of the Rosenberg Self-Esteem Scale (Rosenberg, 1965) and the National Alternative High School Youth Risk Behavior Survey (Grunbaum et al., 1999), respectively. Results indicated that nonmainstream students with high self-esteem were more likely to engage in their first sexual experience and to begin marijuana use later in life. African American students reported having their first sexual experience at an older age, but having more sexual partners than did Latino students. The implications of these findings are discussed.

  10. The 12C/ 13C isotopic ratio in Titan hydrocarbons from Cassini/CIRS infrared spectra

    Science.gov (United States)

    Nixon, C. A.; Achterberg, R. K.; Vinatier, S.; Bézard, B.; Coustenis, A.; Irwin, P. G. J.; Teanby, N. A.; de Kok, R.; Romani, P. N.; Jennings, D. E.; Bjoraker, G. L.; Flasar, F. M.

    2008-06-01

    We have analyzed infrared spectra of Titan recorded by the Cassini Composite Infrared Spectrometer (CIRS) to measure the isotopic ratio 12C/ 13C in each of three chemical species in Titan's stratosphere: CH 4, C 2H 2 and C 2H 6. This is the first measurement of 12C/ 13C in any C 2 molecule on Titan, and the first measurement of 12CH 4/ 13CH 4 (non-deuterated) on Titan by remote sensing. Our spectra cover five widely-spaced latitudes, 65° S to 71° N and we have searched for both latitude variability of 12C/ 13C within a given species, and also for differences between the 12C/ 13C in the three gases. For CH 4 alone, we find C12/C13=76.6±2.7 (1- σ), essentially in agreement with the 12CH 4/ 13CH 4 measured by the Huygens Gas Chromatograph/Mass Spectrometer instrument (GCMS) [Niemann, H.B., and 17 colleagues, 2005. Nature 438, 779-784]: 82.3±1.0, and also with measured values in H 13CN and 13CH 3D by CIRS at lower precision [Bézard, B., Nixon, C., Kleiner, I., Jennings, D., 2007. Icarus 191, 397-400; Vinatier, S., Bézard, B., Nixon, C., 2007. Icarus 191, 712-721]. For the C 2 species, we find C12/C13=84.8±3.2 in C 2H 2 and 89.8±7.3 in C 2H 6, a possible trend of increasingly value with molecular mass, although these values are both compatible with the Huygens GCMS value to within error bars. There are no convincing trends in latitude. Combining all fifteen measurements, we obtain a value of C12/C13=80.8±2.0, also compatible with GCMS. Therefore, the evidence is mounting that 12C/ 13C is some 8% lower on Titan than on the Earth (88.9, inorganic standard), and lower than typical for the outer planets ( 88±7 [Sada, P.V., McCabe, G.H., Bjoraker, G.L., Jennings, D.E., Reuter, D.C., 1996. Astrophys. J. 472, 903-907]). There is no current model for this enrichment, and we discuss several mechanisms that may be at work.

  11. Tobacco use and second-hand smoke exposure in young adolescents aged 12-15 years: data from 68 low-income and middle-income countries.

    Science.gov (United States)

    Xi, Bo; Liang, Yajun; Liu, Yunxia; Yan, Yinkun; Zhao, Min; Ma, Chuanwei; Bovet, Pascal

    2016-11-01

    Tobacco use is an important risk factor for non-communicable diseases worldwide. However, the global extent and prevalence of tobacco use in adolescents is poorly described. Using previously collected survey data, we aimed to assess tobacco use and second-hand smoke exposure in young adolescents aged 12-15 years in 68 low-income and middle-income countries. We used data from the Global School-based Student Health Survey (2006-13) and the China Global Tobacco Youth Survey (2013), which are school-based surveys of young adolescents aged 12-15 years that assess health behaviours using a standardised, anonymous, self-reported questionnaire. We calculated the prevalence of current tobacco use and exposure to second-hand smoke in young adolescents from 68 low-income and middle-income countries that collected these data in the surveys. We used a multilevel model to estimate the association between parental tobacco use, second-hand smoke, and adolescent tobacco use, adjusting for sex, age, school, school class, country's purchasing power parity, smoking initiation age, national prevalence of tobacco use among adults, year the WHO FCTC was ratified for each country, proxy of socioeconomic status, and survey year. The mean prevalence of current tobacco use was 13·6%, ranging from 2·8% in Tajikistan to 44·7% in Samoa. In most countries, the prevalence of tobacco use was higher for boys than girls, and higher for adolescents aged 14-15 years than for those aged 12-13 years. The overall prevalence of second-hand smoke exposure was 55·9%, ranging from 16·4% in Tajikistan to 85·4% in Indonesia. Parental tobacco use (as reported by the young adolescents), especially maternal use, was associated with tobacco use in young adolescents (odds ratio 2·06, 95% CI 1·93-2·19, for maternal and 1·29, 1·23-1·35 for paternal use). Second-hand smoke exposure was also a risk factor for young adolescents' tobacco use (2·56, 2·43-2·69). However, the prevalence of tobacco use was not

  12. Teacher-evaluated self-regulation is related to school achievement and influenced by parental education in schoolchildren aged 8-12 : A case-control study

    NARCIS (Netherlands)

    van Tetering, Marleen A.J.; de Groot, Renate H.M.; Jolles, Jelle

    2018-01-01

    There are major inter-individual differences in the school achievements of students aged 8-12. The determinants of these differences are not known. This paper investigates two possible factors: the self-regulation of the student and the educational levels obtained by their parents. The study first

  13. [A survey of HIV, HBV and HCV infections in children aged 1-13 years in Yi ethnic area, Sichuan province].

    Science.gov (United States)

    Yang, Y; Zhou, Y B; Cheng, W T; Pan, X; Song, X X; Jiang, Q W

    2017-09-10

    Objective: To investigate the prevalence of HIV, HBV and HCV infections in children aged 1-13 years in Yi ethnic area in Sichuan province. Methods: A cross-sectional study was conducted in the form of field survey in four townships selected from Yi ethnic area of Sichuan during 2014-2015. Participants were children aged 1-13 years by sample size of 900 and were screened for HIV antibody, HBV surface antigen and HCV antibody, and laboratory comfirmation was conducted. The area, age, gender and ethnic group specific infection rates were compared by using Fisher's exact test, and multiple comparisons were corrected by using Bonferroni correction. Results: A total of 677 children aged 1-13 years were surveyed. The infection rates of HIV, HBV and HCV were 1.03 % (7/677, 95 %CI : 0.42 % -1.12 % ), 6.65 % (45/677, 95 %CI : 4.89 % -8.79 % ) and 0.15 % (1/677, 95 %CI : 0 % -0.82 % ), respectively. The infection rates of HIV differed among townships ( P =0.000), the infection rate was higher in township D than in township B, the difference was significant ( P HBV and HCV infections were not significant among different townships, age, gender and ethnic groups. The difference in HBV viral load between age group 5-9 years and age groups 10-13 years was not significant ( U =115.000, P =0.967). Conclusions: The burden of HIV and HBV infections in children aged 1-13 years was heavy in rural area of Yi ethnic area in Sichuan. Therefore, it is necessary to take effective measures to block the vertical transmission of HIV and HBV as well as to increase the coverage of HBV vaccination.

  14. Regional assignment of seven loci to 12p 13. 2-pter by PCR analysis of somatic cell hybrids containing the der(12) or the der(X) chromosome from a mesothelioma showing t(X; 12)(q22; p13)

    Energy Technology Data Exchange (ETDEWEB)

    Aerssens, J.; Chaffanet, M.; Baens, M.; Matthijs, G.; Van Den Berche, H.; Cassiman, J.J.; Marynen, P. (Arthritis and Metabolic Bone Disease Research Unit, Leuven (Belgium))

    1994-03-01

    Two somatic cell hybrids containing the der(12) or the der(X) from a mesothelioma with a translocation t(X;12) (q22;p13) as the only chromosomal change were generated to characterize the region of 12p12 containing the translocation breakpoint. Fluorescence in situ hybridization analysis showed the breakpoint on chromosome 12 to occur between VWF and D12S158. On the linkage map developed by J. Weissenbach et al., the breakpoints were located between DXS1106 and DCS1001 on chromosome X. PCR analysis based on genomic sequences, with DNA from both somatic cell hybrids, enabled mapping of CACNL1A1, FGF6, D12S370, D12S38OE, D12S381E, and D12S382E distally to the 12p13 breakpoint and to VWF. 11 refs., 2 figs., 1 tab.

  15. The Relationship between Neighbourhood Green Space and Child Mental Wellbeing Depends upon Whom You Ask: Multilevel Evidence from 3083 Children Aged 12-13 Years.

    Science.gov (United States)

    Feng, Xiaoqi; Astell-Burt, Thomas

    2017-02-27

    Recent reviews of the rapidly growing scientific literature on neighbourhood green space and health show strong evidence for protective and restorative effects on mental wellbeing. However, multiple informants are common when reporting mental wellbeing in studies of children. Do different informants lead to different results? This study utilised nationally representative data on Goodman's 25-item Strengths and Difficulties Questionnaire reported by 3083 children (aged 12-13 years old), and their parents and teachers. Multilevel models were used to investigate whether similar associations between child mental wellbeing (as measured using the total difficulties score and the internalising and externalising subscales) and neighbourhood green space quantity and quality are obtained regardless of the informant. After adjustment for confounders, higher green space quantity and quality were associated with consistently more favourable child mental wellbeing on all three measures, regardless of the informant. However, associations with green space quantity were statistically significant ( p health should acknowledge when different informants of outcomes could lead to different conclusions.

  16. Socio-motivational moderators-two sides of the same coin? Testing the potential buffering role of socio-motivational relationships on achievement drive and test anxiety among German and Canadian secondary school students.

    Science.gov (United States)

    Hoferichter, Frances; Raufelder, Diana; Eid, Michael

    2015-01-01

    The current cross-national study investigates the potential buffering role of socio-motivational relationships for the association of achievement drive (AD) and test anxiety (TX) in secondary school students from Canada and Germany. One thousand and eighty-eight students (54% girls, M age = 13.71, SD = 0.53, age span 12-15 years) from the state of Brandenburg and 389 students from Quebéc (55.9% girls, M age = 13.43, SD = 0.82, age span 12-16 years) were asked about their socio-motivational relationships with their teachers and peers, their drive for achievement, and TX. Multigroup latent moderated structural equations were conducted to test for the moderator role of socio-motivational relationships that would buffer feelings of TX related to the drive for achievement. The analyses revealed the two-sided role socio-motivational relationships can have for students with different levels of AD; intensifying or mitigating feelings of TX. Thereby, the results of this study extend the buffering hypothesis by Cohen and Wills (1985). Cross-national differences between Canada and Germany were found concerning the studied moderators on the association of AD and TX: While for German students teacher-student relationships acted as moderator, for Canadian students student-student relationships and teachers acting as positive motivators displayed a moderator role.

  17. Renovation of the facades of buildings 11, 12, 13 and 14

    CERN Multimedia

    TS/FM Group

    2005-01-01

    Restoration work on the facades of Buildings 11, 12, 13 and 14 will begin on 6 June 2005 and is scheduled to be completed by the end of September. This work consists in replacing the windows of Building 14 and of the eastern facade of Building 13, and in repairing the windows of Buildings 11 and 12 and of the northern facade of Building 13. The concrete parts which have suffered carbonation damage will also be repaired. During this period, parking around these buildings will be restricted for safety reasons and for the requirements of the work site. All people working in these buildings or in their direct vicinity are kindly requested to comply with the signs in place. Thank you in advance for your understanding. TS/FM Group

  18. Renovation of the facades of buildings 11, 12, 13 and 14

    CERN Multimedia

    TS/FM group

    2005-01-01

    Restoration work on the facades of Buildings 11, 12, 13 and 14 will begin on 6 June 2005 and is scheduled to be completed by the end of September. This work consists in replacing the windows of Building 14 and of the eastern facade of Building 13, and in repairing the windows of Buildings 11 and 12 and of the northern facade of Building 13. The concrete parts which have suffered carbonation damage will also be repaired. During this period, parking around these buildings will be restricted for safety reasons and for the requirements of the work site. All people working in these buildings or in their direct vicinity are kindly requested to comply with the signs in place. Thank you in advance for your understanding. Group TS/FM

  19. Dietary patterns and cognitive ability among 12- to 13 year-old adolescents in Selangor, Malaysia.

    Science.gov (United States)

    Nurliyana, Abdul Razak; Mohd Nasir, Mohd Taib; Zalilah, Mohd Shariff; Rohani, Abdullah

    2015-02-01

    The present study aimed to identify dietary patterns and determine the relationship between dietary patterns and cognitive ability among 12- to 13 year-old Malay adolescents in the urban areas of Gombak district in Selangor, Malaysia. Data on sociodemographic background were obtained from parents. Height and weight were measured and BMI-for-age was determined. Adolescents were interviewed on their habitual dietary intakes using a semi-quantitative FFQ. Cognitive ability was assessed using the Wechsler Nonverbal Scale of Ability in a one-to-one manner. Dietary patterns were constructed using principal component analysis based on thirty-eight food groups of the semi-quantitative FFQ. Urban secondary public schools in the district of Gombak in Selangor, Malaysia. Malay adolescents aged 12 to 13 years (n 416). The mean general cognitive ability score was 101·8 (sd 12·4). Four major dietary patterns were identified and labelled as 'refined-grain pattern', 'snack-food pattern', 'plant-based food pattern' and 'high-energy food pattern'. These dietary patterns explained 39·1 % of the variance in the habitual dietary intakes of the adolescents. The refined-grain pattern was negatively associated with processing speed, which is a construct of general cognitive ability. The high-energy food pattern was negatively associated with general cognitive ability, perceptual reasoning and processing speed. Monthly household income and parents' educational attainment were positively associated with all of the cognitive measures. In multivariate analysis, only the high-energy food pattern was found to contribute significantly towards general cognitive ability after controlling for socio-economic status. Consumption of foods in the high-energy food pattern contributed towards general cognitive ability after controlling for socio-economic status. However, the contribution was small.

  20. Effect of cold-working and aging processes on the microstructure, mechanical properties and electrical conductivity of Cu–13.5%Mn–4%Ni–1.2%Ti alloy

    International Nuclear Information System (INIS)

    Ehsanian Mofrad, H.; Raygan, Sh.; Amin Forghani, B.; Hanaei, K.; Ahadi, F.K.

    2012-01-01

    Highlights: ► Mn 2 Ti 4 O precipitates observed in the microstructure of as-cast alloys. ► During aging at 400, 450 and 500 °C hardness reached the value of 139, 165 and 192 HV. ► β-Cu 3 Ti and Ni 3 Ti precipitates formed during over aging at temperatures of 500 °C. ► Electrical conductivity was 29.7% IACS in the 0% cold worked samples aged at 500 °C. ► Conductivity of 28% IACS, hardness of 250 HV obtained by 60% cold work + aging at 450 °C. -- Abstract: In this study, variations of hardness, electrical conductivity, strength, elongation and microstructure of the Cu–13.5%Mn–4%Ni–1.2%Ti alloy were investigated during aging, cold-working and subsequent aging. X-ray diffraction (XRD), transmission electron microscopy and scanning electron microscopy methods were used to evaluate the microstructure of the alloy. Tensile, hardness and electrical conductivity measurements were also used for investigating the effects of processing parameters on the characteristic of the alloy. Hardness value of 190 HV and strength of 644 MPa were obtained after aging the as-cast alloy for 4 h at the temperature of 500 °C. The maximum hardness and strength increased up to 253 HV and 816 MPa, respectively, after aging 60% cold-worked samples for 1 h at the temperature of 500 °C. The dominant strengthening mechanism during aging was attributed to the precipitation of Cu 4 Ti phase. Formation of the β-Cu 3 Ti phase during aging at the temperature of 500 °C was another reason of strengthening. As a result of aging, electrical conductivity of both as-cast and cold-worked alloys was improved. The maximum conductivity of 29.7% IACS was attained after aging the as-cast material at the temperature of 500 °C for 4 h.

  1. Use of social media is associated with short sleep duration in a dose-response manner in students aged 11 to 20 years.

    Science.gov (United States)

    Sampasa-Kanyinga, Hugues; Hamilton, Hayley A; Chaput, Jean-Philippe

    2018-04-01

    This study examined the association between social media and sleep duration among Canadian students aged 11-20. Data from 5242 students were obtained from the 2015 Ontario Student Drug Use and Health Survey, a province-wide, school-based survey that has been conducted every two years since 1977. We measured the respondents' sleep duration against the recommended ranges of 9-11 h per night at 11-13 years of age, 8-10 h at 14-17 and 7-9 h per night for those aged 18 years or more. Overall, 36.4% of students met or exceeded the recommended sleep duration and 63.6% slept less than recommended, with 73.4% of students reporting that they used social media for at least one hour per day. After adjusting for various covariates, the use of social media was associated with greater odds of short sleep duration in a dose-response manner (p for linear trend fashion among Canadian students aged 11-20. ©2018 Foundation Acta Paediatrica. Published by John Wiley & Sons Ltd.

  2. Enhancement of Palmarumycin C12 and C13 Production by the Endophytic Fungus Berkleasmium sp. Dzf12 in an Aqueous-Organic Solvent System.

    Science.gov (United States)

    Mou, Yan; Xu, Dan; Mao, Ziling; Dong, Xuejiao; Lin, Fengke; Wang, Ali; Lai, Daowan; Zhou, Ligang; Xie, Bingyan

    2015-11-12

    The endophytic fungus Berkleasmium sp. Dzf12, isolated from Dioscorea zingiberensis, was found to produce palmarumycins C12 and C13 which possess a great variety of biological activities. Seven biocompatible water-immiscible organic solvents including n-dodecane, n-hexadecane, 1-hexadecene, liquid paraffin, dibutyl phthalate, butyl oleate and oleic acid were evaluated to improve palmarumycins C12 and C13 production in suspension culture of Berkleasmium sp. Dzf12. Among the chosen solvents both butyl oleate and liquid paraffin were the most effective to improve palmarumycins C12 and C13 production. The addition of dibutyl phthalate, butyl oleate and oleic acid to the cultures of Berkleasmium sp. Dzf12 significantly enhanced palmarumycin C12 production by adsorbing palmarumycin C12 into the organic phase. When butyl oleate was fed at 5% (v/v) in medium at the beginning of fermentation (day 0), the highest palmarumycin C12 yield (191.6 mg/L) was achieved, about a 34.87-fold increase in comparison with the control (5.3 mg/L). n-Dodecane, 1-hexadecene and liquid paraffin had a great influence on the production of palmarumycin C13. When liquid paraffin was added at 10% (v/v) in medium on day 3 of fermentation, the palmarumycin C13 yield reached a maximum value (134.1 mg/L), which was 4.35-fold that of the control (30.8 mg/L). Application of the aqueous-organic solvent system should be a simple and efficient process strategy for enhancing palmarumycin C12 and C13 production in liquid cultures of the endophytic fungus Berkleasmium sp. Dzf12.

  3. Enhancement of Palmarumycin C12 and C13 Production by the Endophytic Fungus Berkleasmium sp. Dzf12 in an Aqueous-Organic Solvent System

    Directory of Open Access Journals (Sweden)

    Yan Mou

    2015-11-01

    Full Text Available The endophytic fungus Berkleasmium sp. Dzf12, isolated from Dioscorea zingiberensis, was found to produce palmarumycins C12 and C13 which possess a great variety of biological activities. Seven biocompatible water-immiscible organic solvents including n-dodecane, n-hexadecane, 1-hexadecene, liquid paraffin, dibutyl phthalate, butyl oleate and oleic acid were evaluated to improve palmarumycins C12 and C13 production in suspension culture of Berkleasmium sp. Dzf12. Among the chosen solvents both butyl oleate and liquid paraffin were the most effective to improve palmarumycins C12 and C13 production. The addition of dibutyl phthalate, butyl oleate and oleic acid to the cultures of Berkleasmium sp. Dzf12 significantly enhanced palmarumycin C12 production by adsorbing palmarumycin C12 into the organic phase. When butyl oleate was fed at 5% (v/v in medium at the beginning of fermentation (day 0, the highest palmarumycin C12 yield (191.6 mg/L was achieved, about a 34.87-fold increase in comparison with the control (5.3 mg/L. n-Dodecane, 1-hexadecene and liquid paraffin had a great influence on the production of palmarumycin C13. When liquid paraffin was added at 10% (v/v in medium on day 3 of fermentation, the palmarumycin C13 yield reached a maximum value (134.1 mg/L, which was 4.35-fold that of the control (30.8 mg/L. Application of the aqueous-organic solvent system should be a simple and efficient process strategy for enhancing palmarumycin C12 and C13 production in liquid cultures of the endophytic fungus Berkleasmium sp. Dzf12.

  4. THE J = 1-0 TRANSITIONS OF 12CH+, 13CH+, AND 12CD+

    International Nuclear Information System (INIS)

    Amano, T.

    2010-01-01

    A new set of laboratory experimental frequencies for the J = 1-0 rotational transition of 12 CH + , 13 CH + , and 12 CD + are obtained by using a liquid nitrogen cooled extended negative glow discharge in a gas mixture of CH 4 and He. These frequencies are found to be significantly different from those reported previously. The unexpectedly large Zeeman effect and the spin-rotation hyperfine interaction for a 1 Σ molecule are observed. The Zeeman effect and the hyperfine interaction appear to be distinctively different for each isotopic species. Theoretical considerations reveal the isotopic dependence of the magnitudes of these effects, and they also provide strong evidence for the identifications.

  5. 12C(d,p) 13C reaction at Esub(d) = 30 MeV to the positive-parity states in 13C

    International Nuclear Information System (INIS)

    Ohnuma, H.; Hoshino, N.; Mikoshiba, O.

    1985-07-01

    The 12 C(d, p) 13 C reaction has been studied at Esub(d) = 30 MeV. All the known positive-parity states of 13 C below 10 MeV in excitation energy, including the 7/2 + and 9/2 + states, are observed in this reaction. The angular distributions for these positive-parity bound and unbound states are analyzed in CCBA frame work. The 13 C wave functions, which reproduce the resonant and non-resonant scattering of neutrons from 12 C, also give good accounts of the experimentally observed angular distributions and energy spectra of outgoing protons in the 12 C(d, p) 13 C reaction. In most cases the cross section magnitude and the angular distribution shape are primarily determined by the 0 + x j component, even if it is only a small fraction of the total wave function. An exception is the 7/2 + state, where the main contribution comes from the 2 + x dsub(5/2) component. The inclusion of the 4 + state in 12 C and the gsub(9/2) and gsub(7/2) neutron components in the n + 12 C system has very small effects on the low-spin states, but is indispensable for a good fit to the 7/2 + and 9/2 + angular distributions. The transitions to the negative-parity states, 1/2 1 - , 3/2 1 - , 5/2 - , 7/2 - and 1/2 3 - , are also observed experimentally, and analyzed by DWBA. (author)

  6. Lifestyles and psychosomatic symptoms among elementary school students and junior high school students.

    Science.gov (United States)

    Isshiki, Yuriko; Morimoto, Kanehisa

    2004-05-01

    To examine the relationship between lifestyles and psychosomatic symptoms in children, we conducted a self-administered questionnaire survey of elementary school students and junior high school students in Japan. We designed an original questionnaire to investigate the lifestyles and psychosomatic symptoms of children. In 1997, responses to the questionnaires were elicited from public elementary school fourth grade students (then aged 9-10) and public junior high school seventh grade students (then aged 12-13). The survey was repeated annually for three years as the students advanced through school. For both boys and girls, each cross-sectional analysis revealed a strong relationship between lifestyle behaviors and psychosomatic symptoms. Psychosomatic, symptoms scores varied according to daily hours of sleep, eating of breakfast, having strong likes and dislikes of food, bowel habits, and daily hours of television watching. Both boys and girls with "good" lifestyle, behaviors evaluated by the HPI (Health Practice Index) showed lower scores for psychosomatic symptoms. These findings show that the lifestyle behaviors of children are significantly associated with psychosomatic symptoms and suggest that poor lifestyle behaviors are likely to increase physical and psychological health risks.

  7. The 12C/13C Isotopic Ratio in Planetary Nebulae as Deduced from IUE Data

    Science.gov (United States)

    Miskey, C. L.; Feibelman, W. A.; Bruhweiler, F. C.

    2000-05-01

    The relative abundances of C, N, and O and the isotopic ratio of 12C/13C represent tracers of nucleosynthesis in intermediate stars with main-sequence masses between 0.6 and 8.0 solar masses in our Galaxy. Determining these abundances and the isotopic 12C/13C ratio in planetary nebulae (PNe) represent perhaps the best means to discern exactly how the ISM is enriched by CNO stellar nucleosynthesis. Walsh et al. (1996) and Clegg et al. (1997), using the Hubble Space Telescope, have derived the isotopic 12C/13C abundance ratio in the galactic carbon-rich PN, NGC 3918, and placed marginal constraints on it for the Magellanic PNe, N2 (SMC) and N122 (LMC). This was done using the well-known 12C 3P-1S (J=1-0 and J=2-0) transitions of C+2 at 1906.68 Angstroms and 1908.77 Angstroms and a J=0-0 transition at 1909.6 Angstroms, which is strictly forbidden in 12C. The finite nuclear spin of 13C (I=1/2) permits a corresponding F=1/2-1/2 electric dipole transition not seen in 12C. Since the 1909.6 Angstroms line is well separated from the other two 12C transitions, it provides an important means of determining 12C/13C in planetary nebulae. We have just completed a search of archival International Ultraviolet Explorer (IUE) high-dispersion spectra of approximately three dozen PNe, and derived 12C/13C ratios of 39 and 23 for the galactic PNe, NGC 2440 and NGC 6302, respectively. These are values much lower than the solar value of 89. In the other objects, the limited S/N of the IUE data indicate 12C/13C ratio upper limits much higher than 50. The implications of these results and their pertinence to stellar evolution are discussed.

  8. Comparison of the quench experiments CORA-12, CORA-13, CORA-17

    International Nuclear Information System (INIS)

    Hagen, S.; Hofmann, P.; Noack, V.; Sepold, L.; Schanz, G.; Schumacher, G.

    1996-08-01

    The CORA quench experiments 12, 13 (PWR) und 17 (BWR) are in agreement with the inpile tests LOFT LP-FP-2 and PBF SFD-ST and the TMI accident: Flooding of hot Zircaloy clad fuel rods does not result in an immediate cooldown of the bundle, but produces a remarkable temporary temperature increase connected to a strong peak in hydrogen production. For the preparation of new quench bundle tests, necessary for the understanding of the mechanisms governing the quench process and support for validation of future quench models in SFD codes the three tests are compared to each other and to the relevant non-quench tests CORA-29 (PWR) and CORA-16 (BWR). The PWR tests CORA-12 and CORA-13 are of the same geometrical arrangement and test conduct. An exception is the shorter time between power shutdown and quench initiation for CORA 13, resulting in a higher temperature of the bundle at start of quenching. The BWR test CORA-17 used B 4 C absorber and Zircaloy channel box walls, but was in respect to the delay time between power shutdown and start of quenching similar to test CORA-12. (orig./GL) [de

  9. Caries risk assessment among 12-13 year old school-going children of government and private schools of Tirupur district, Tamil Nadu.

    Science.gov (United States)

    Mitha, Madhu M; Nijesh, J E; Chaly, Preetha Elizabeth; Priyadharshini, Indra; Junaid, Mohammed; Vaishnavi, S

    2016-01-01

    Dental caries is as ancient as humankind and has the longest association with the dental profession, an association that is punctuated with agony and ecstasy. The agonizing fact is that despite several efforts toward total eradication, this disease is still prevalent. Nevertheless, an ecstatic success of the profession is the global decline in the incidence compared to the yesteryears' epidemics. Hence, predicting dental caries earlier is a boon. One such model to predict is cariogram developed by Bratthall in 1996. The aim of this study was to assess the caries risk among 12-13 year old school-going children of government and private schools of Tirupur district in Tamil Nadu using cariogram computer model. A cross-sectional survey was carried out among 136 study subjects of 12-13 year of age, who fulfilled the inclusion and exclusion criteria. Data were collected using a predesigned questionnaire and scored according to a standardized protocol. The Chi-square test was used to find differences between caries-related factors and cariogram group. The correlation was acquired using Spearman's correlation. Government school study subjects had 56% of chance of avoiding caries whereas the private school study subjects had 66% of chance of avoiding caries in future and the differences were statistically significant (P = 0.001). A negative correlation was observed between the chance to avoid dental caries and cariogram sectors. The majority of the study subjects from government school belonged to medium-risk category and private school subjects belonged to low-risk category which inferred that private school students have high chance to avoid dental caries compared to government study subjects.

  10. 13 CFR 123.12 - Are books and records required?

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Are books and records required... PROGRAM Overview § 123.12 Are books and records required? You must retain complete records of all... disaster business or economic injury loan, you must also maintain current and accurate books of account...

  11. Chemical synthesis and biological evaluation of cis- and trans-12,13-cyclopropyl and 12,13-cyclobutyl epothilones and related pyridine side chain analogues

    DEFF Research Database (Denmark)

    Nicolaou, K C; Namoto, K; Ritzén, A

    2001-01-01

    -activity relationships, including the conclusion that neither the epoxide nor the stereochemistry at C12 are essential, while the stereochemistry at both C13 and C15 are crucial for biological activity. These studies also confirmed the importance of both the cyclopropyl and 5-methylpyridine moieties in conferring potent...

  12. Cardiopulmonary Resuscitation Training in Schools: A Comparison of Trainee Satisfaction among Different Age Groups.

    Science.gov (United States)

    Hori, Shingo; Suzuki, Masaru; Yamazaki, Motoyasu; Aikawa, Naoki; Yamazaki, Hajime

    2016-09-25

    Cardiopulmonary resuscitation (CPR) has recently been added to the school curriculum worldwide and is currently taught to students between the ages of 10 and 16 years. The effect of the age of trainees on their satisfaction with CPR training has yet been elucidated. The aim of this study was to compare the satisfaction of trainees of different ages who participated in CPR training in schools in Japan. In total, 392 primary school students (10-11 years old), 1798 junior high school students (12-13 years old), and 4162 high schools students (15-16 years old) underwent the same 3-h course of CPR training, according to the guidelines of 2000 for Emergency Cardiovascular Care and CPR. The course was evaluated by a questionnaire completed by the participants. Primary school students responded most positively to all questions, including those reflecting enjoyment and the confidence of participants to apply CPR (Jonckheere-Terpstra test: P CPR training was strongly related to their age. Primary school students enjoyed CPR training more and were more confident in their ability to perform CPR than junior high and high school students were. Therefore, children aged 10-11 years may be the most appropriate candidates for the introduction of CPR training in schools.

  13. The Relationship between Neighbourhood Green Space and Child Mental Wellbeing Depends upon Whom You Ask: Multilevel Evidence from 3083 Children Aged 1213 Years

    Science.gov (United States)

    Feng, Xiaoqi; Astell-Burt, Thomas

    2017-01-01

    Recent reviews of the rapidly growing scientific literature on neighbourhood green space and health show strong evidence for protective and restorative effects on mental wellbeing. However, multiple informants are common when reporting mental wellbeing in studies of children. Do different informants lead to different results? This study utilised nationally representative data on Goodman’s 25-item Strengths and Difficulties Questionnaire reported by 3083 children (aged 1213 years old), and their parents and teachers. Multilevel models were used to investigate whether similar associations between child mental wellbeing (as measured using the total difficulties score and the internalising and externalising subscales) and neighbourhood green space quantity and quality are obtained regardless of the informant. After adjustment for confounders, higher green space quantity and quality were associated with consistently more favourable child mental wellbeing on all three measures, regardless of the informant. However, associations with green space quantity were statistically significant (p health should acknowledge when different informants of outcomes could lead to different conclusions. PMID:28264461

  14. Evaluation of some physical fitness characteristics in 11-13 years old

    Directory of Open Access Journals (Sweden)

    Ileana Monica Popovici

    2017-01-01

    Full Text Available Abstract Many studies indicate that a physical fitness characteristic is an important marker for healthy body and healthy mind. The major purpose of this study is to explore the levels of physical fitness of the students between 11 and 13 years of age. The participants of this study are 251 volunteer students including 95 boys and 156 girls between the ages 11 and 13 who participated at physical education lessons two times a week. The students were assessed for six anthropometric characteristics and five physical tests. Mean, standard deviation, and multiple comparisons were used for statistical analyses to find out differences between sexes with ANOVA, and Bonferoni Tests for differences between ages. Anthropometric measurements were reported as body mass index, height, weight, arm span, waist and hip and physical fitness traits such as agility, balance and strength. The findings suggest some differences between female and male students and between ages; male participants obtained higher results as means compared to female participants. Keywords: anthropometrics, agility, balances, strength, students

  15. Corporal and testicular biometry in wild boar from birth to 12 months of age

    Directory of Open Access Journals (Sweden)

    Danillo Velloso Ferreira Murta

    2013-02-01

    Full Text Available The aim of this tudy was to evaluate corporal and testicular development in wild boars (Sus scrofa scrofa from birth to 12 months of age, evaluating body weight, biometric testicular parameters, and gonadosomatic index. Thirty-nine male wild boars from a commercial farm licensed by IBAMA were used in the study. The animals were weighed and assigned to 13 experimental groups. The testes were recovered through unilateral orchiectomy, weighed on an analytical balance and measured for length, width and thickness. Body weight and testicular measures increased with the age, up to 12 months, and were more accelerated in the first and ninth months. Initially the testicular growth pattern, between zero and nine months, followed the body growth, and the gonadosomatic index varied from 0.07 to 0.09%. Between 9 and 11 months, the testicular growth was superior to the body growth, and the gonadosomatic index varied from 0.09 to 0.16%. Finally, after 11 months of age, testicular and body growth had a similar behavior. In conclusion, body weight, testicular biometry, and gonadosomatic index development accelerated in the ninth month.

  16. Relationship between dental caries and metabolic syndrome among 13 998 middle-aged urban Chinese.

    Science.gov (United States)

    Cao, Xia; Wang, Dongliang; Zhou, Jiansong; Yuan, Hong; Chen, Zhiheng

    2017-04-01

    The association between dental caries and metabolic syndrome (MetS) is inconsistent. The aim of the present study was to assess the relationship between dental caries and MetS and its components in a middle-aged Chinese population. A cross-sectional analysis was performed of 13 998 participants aged 45-65 years undergoing a health check during 2013-14. An index variable of decayed, missing, and filled teeth (DMFT) was calculated. Logistic regression was used to estimate odds ratios (ORs) and 95 % confidence intervals (CIs) after adjustment for sex, age, education level, dietary habits, alcohol use, smoking, physical activity, and periodontitis. Of the 13 998 participants, 6164 had dental caries and 7834 did not; 3571 had MetS, whereas 10 427 did not. Participants with severe caries showed a higher prevalence of MetS, abdominal obesity, elevated blood pressure, dyslipidemia, and hyperglycemia than those with mild or no caries (all P dental caries and those with two or more DMFT were 1.12 (95 % CI 1.14-1.74) and 1.09 (95 % CI, 0.89-1.21), respectively (P trend  caries were associated with MetS among subjects with hyperglycemia (OR 1.14 [95%CI, 0.98-1.34]; P caries and abdominal obesity, hypertriglyceridemia, low high-density lipoprotein cholesterol, and elevated blood pressure (adjusted ORs [95 % CIs] 0.98 [0.82-1.16], 1.01 [0.85-1.19], 0.84 [0.70-1.00], and 0.96 [0.86-1.13], respectively; all P > 0.05). Dental caries were associated with MetS among middle-aged Chinese in the present study. © 2016 Ruijin Hospital, Shanghai Jiaotong University School of Medicine and John Wiley & Sons Australia, Ltd.

  17. Evaluation of oral and dental health of 6-12 year-old students in Kermanshah city

    Directory of Open Access Journals (Sweden)

    Mohammad Reza Nokhostin

    2013-09-01

    Full Text Available Background: Oral and dental health are among the most important aspects of individual health. Thus, it is necessary to determine community’s oral health status. Various epidemiological studies are required at different levels to assess the efficacy of preventive, oral and dental health control programs in a society. Complications such as nutritional adverse effects, periodontal diseases and adverse psychological effects of dental caries and etc. could be prevented by in-time diagnosis and treatment. This study aimed to assess DMF, dmf index and periodontal status in 6-12 year-old students in Kermanshah City in 2009. Material and Methods: This was a descriptive cross-sectional study. Data were collected through interview and dental clinical examination using disposable dental explorer, dental mirror, periodontal probe, a flash light and a marker. Data were entered into a questionnaire containing demographic characteristics and oral and dental health status of subjects (WHO oral health assessments form. A total of 1050 students aged 6 to 12 years were evaluated for their oral health status in Kermanshah City. Data were analyzed using SPSS version 14 software. T-test and chi square test were also used for analysis. Results: A total of 50% of boys and 52% of girls were susceptible to dent facial problems due to caries, extraction, premature loss of deciduous teeth, and congenital or acquired maxillofacial problems following conditions like mouth breathing due to adenoid and etc. Overall, 18.3% of 6 year old students were caries free. Among middle school students, DMFT was 1.65±1.82 and 3.88±2.72 among female and male 12 year old students, respectively. In general, 19.8% of elementary and 16.8% of 12 year old students had clinically healthy gingiva 21.6% of 6 to 12 year old students did not brush their teeth. A significant correlation was found between the frequency of tooth brushing per day and mean dmft, mean DMFT and gingival health (P<0

  18. Metacognitive awareness and math anxiety in gifted students

    Directory of Open Access Journals (Sweden)

    Hakan Sarıcam

    2015-12-01

    Full Text Available The basic purpose of this study has been to examine the relationships between metacognitive awareness and maths anxiety in gifted students. The second aim was to compare with gifted and non-gifted students’ metacognitive awareness and maths anxiety levels. The participants were 300 (150 gifted, 150 non-gifted volunteer secondary school students in Turkey. The mean age of the participants was 12.56 years ranging from 12 to 13 years. For gathering data, the Maths Anxiety Scale for Elementary School Students and The Metacognitive Awareness Inventory for Children were used. For analysing the data, Spearman correlation analysis, the Mann Whitney U test, and linear regression analysis were used. According to the findings: firstly, gifted students’ metacognitive awareness scores were higher than those of non-gifted students. On the other hand, non-gifted students’ maths anxiety levels were higher than those of gifted students. Secondly, there was negative correlation between metacognitive awareness and math anxiety. Finally, the findings of linear regression analysis indicated that metacognitive awareness is explained by 48% total variance of maths anxiety in gifted students.

  19. The cold-induced lipokine 12,13-diHOME promotes fatty acid transport into brown adipose tissue

    DEFF Research Database (Denmark)

    Lynes, Matthew D; Leiria, Luiz O; Lundh, Morten

    2017-01-01

    and glucose tolerance; as a class, these lipids are referred to as 'lipokines'. Because BAT is a specialized metabolic tissue that takes up and burns lipids and is linked to systemic metabolic homeostasis, we hypothesized that there might be thermogenic lipokines that activate BAT in response to cold. Here we...... show that the lipid 12,13-dihydroxy-9Z-octadecenoic acid (12,13-diHOME) is a stimulator of BAT activity, and that its levels are negatively correlated with body-mass index and insulin sensitivity. Using a global lipidomic analysis, we found that 12,13-diHOME was increased in the circulation of humans...... and mice exposed to cold. Furthermore, we found that the enzymes that produce 12,13-diHOME were uniquely induced in BAT by cold stimulation. The injection of 12,13-diHOME acutely activated BAT fuel uptake and enhanced cold tolerance, which resulted in decreased levels of serum triglycerides...

  20. Is 8:30 a.m. Still Too Early to Start School? A 10:00 a.m. School Start Time Improves Health and Performance of Students Aged 13–16

    Directory of Open Access Journals (Sweden)

    Paul Kelley

    2017-12-01

    Full Text Available While many studies have shown the benefits of later school starts, including better student attendance, higher test scores, and improved sleep duration, few have used starting times later than 9:00 a.m. Here we report on the implementation and impact of a 10 a.m. school start time for 13 to 16-year-old students. A 4-year observational study using a before-after-before (A-B-A design was carried out in an English state-funded high school. School start times were changed from 8:50 a.m. in study year 0, to 10 a.m. in years 1–2, and then back to 8:50 a.m. in year 3. Measures of student health (absence due to illness and academic performance (national examination results were used for all students. Implementing a 10 a.m. start saw a decrease in student illness after 2 years of over 50% (p < 0.0005 and effect size: Cohen's d = 1.07, and reverting to an 8:50 a.m. start reversed this improvement, leading to an increase of 30% in student illness (p < 0.0005 and Cohen's d = 0.47. The 10:00 a.m. start was associated with a 12% increase in the value-added number of students making good academic progress (in standard national examinations that was significant (<0.0005 and equivalent to 20% of the national benchmark. These results show that changing to a 10:00 a.m. high school start time can greatly reduce illness and improve academic performance. Implementing school start times later than 8:30 a.m., which may address the circadian delay in adolescents' sleep rhythms more effectively for evening chronotypes, appears to have few costs and substantial benefits.

  1. Effects of combat training on visuomotor performance in children aged 9 to 12 years - an eye-tracking study.

    Science.gov (United States)

    Ju, Yan-Ying; Liu, Yen-Hsiu; Cheng, Chih-Hsiu; Lee, Yu-Lung; Chang, Shih-Tsung; Sun, Chi-Chin; Cheng, Hsin-Yi Kathy

    2018-02-07

    Data on visuomotor performance in combat training and the effects of combat training on visuomotor performance are limited. This study aimed to investigate the effects of a specially designed combat sports (CS) training program on the visuomotor performance levels of children. A pre-post comparative design was implemented. A total of 26 students aged 9-12 years underwent 40-min CS training sessions twice a week for 8 weeks during their physical education classes. The CS training program was designed by a karate coach and a motor control specialist. The other 30 students continued their regular activities and were considered as a control group. Each student's eye movement was monitored using an eye tracker, whereas the motor performance was measured using a target hitting system with a program-controlled microprocessor. The measurements were taken 8 weeks before (baseline), 1 day before (pretest), and 1 week after (posttest) the designated training program. The task used for evaluating these students was hitting or tracking random illuminated targets as rapidly as possible. A two-way analysis of variance [group(2) × time(3)] with repeated measures of time was performed for statistical analysis. For the children who received combat training, although the eye response improvement was not significant, both the primary and secondary saccade onset latencies were significantly earlier compared to the children without combat training. Both groups of students exhibited improvement in their hit response times during the target hitting tasks. The current finding supported the notion that sports training efforts essentially enhance visuomotor function in children aged 9-12 years, and combat training facilitates an earlier secondary saccade onset.

  2. The 12C/13C ratio in stellar atmospheres. VI. Five luminous cool stars

    International Nuclear Information System (INIS)

    Hinkle, K.H.; Lambert, D.L.; Snell, R.L.

    1976-01-01

    The isotopic abundance ratio, 12 C/ 13 C, is derived from the CO vibration rotation lines at 1.6 and 2.3 μ for five cool luminous stars by a simple curve-of-growth technique. A new analysis of CN lines at 8000 A is also described for α Sco and α Ori. Results derived independently from CO and CN are in agreement. Final results are 12 C/ 13 C=7 +- 2(α Ori), 12 +- 3(α Sco), 7 +- 3(β Peg), 25 +- 7(chi Cyg), 17 +- 4(α Her), and 7 +- 1.5(α Boo). The α Boo analysis provides a check on the CO curve-of-growth technique; the 12 C/ 13 C ratio from the 2.3 μ CO lines is in good agreement with the previously determined ratio from CN and CH lines

  3. Enhancement of Palmarumycin C12 and C13 Production by the Endophytic Fungus Berkleasmium sp. Dzf12 in an Aqueous-Organic Solvent System

    OpenAIRE

    Mou, Yan; Xu, Dan; Mao, Ziling; Dong, Xuejiao; Lin, Fengke; Wang, Ali; Lai, Daowan; Zhou, Ligang; Xie, Bingyan

    2015-01-01

    The endophytic fungus Berkleasmium sp. Dzf12, isolated from Dioscorea zingiberensis, was found to produce palmarumycins C12 and C13 which possess a great variety of biological activities. Seven biocompatible water-immiscible organic solvents including n-dodecane, n-hexadecane, 1-hexadecene, liquid paraffin, dibutyl phthalate, butyl oleate and oleic acid were evaluated to improve palmarumycins C12 and C13 production in suspension culture of Berkleasmium sp. Dzf12. Among the chosen solvents bot...

  4. Project BioEYES: Accessible Student-Driven Science for K-12 Students and Teachers.

    Science.gov (United States)

    Shuda, Jamie R; Butler, Valerie G; Vary, Robert; Farber, Steven A

    2016-11-01

    BioEYES, a nonprofit outreach program using zebrafish to excite and educate K-12 students about science and how to think and act like scientists, has been integrated into hundreds of under-resourced schools since 2002. During the week-long experiments, students raise zebrafish embryos to learn principles of development and genetics. We have analyzed 19,463 participating students' pre- and post-tests within the program to examine their learning growth and attitude changes towards science. We found that at all grade levels, BioEYES effectively increased students' content knowledge and produced favorable shifts in students' attitudes about science. These outcomes were especially pronounced in younger students. Having served over 100,000 students, we find that our method for providing student-centered experiences and developing long-term partnerships with teachers is essential for the growth and sustainability of outreach and school collaborations.

  5. Prevalence and severity of dental caries in school students aged 6-12 years in Mafraq governorate: Northeast of Jordan

    Directory of Open Access Journals (Sweden)

    Leena Smadi

    2017-01-01

    CONCLUSION: The caries prevalence in this age group in Mafraq was very high. One-third of the examined students had very high deft and DMFT scores, which reflected negligence of children oral health. Untreated dental caries was the main component of DMFT scores among the examined population, indicating lack of dental care services for those children, especially for refugees.

  6. Social anxiety and attitude towards conspicuous consumption in sixth and seventh grade primary school students

    Directory of Open Access Journals (Sweden)

    Vukičević Leposava

    2011-01-01

    Full Text Available Our previous research was aimed at psychological underpinnings of the attitude towards conspicuous consumption (displayed through use of designer clothes in high school and university students, aged 17 to 25. This study examined the relationship between the attitude towards designer clothes and social anxiety in 205 sixth and seventh grade primary school children, aged 12 to 13. Their attitude towards designer clothes was assessed by an abridged version of our standard questionnaire (CC - 28. Social anxiety was evaluated by a psychometric scale SA - 34 that was modeled after the social anxiety scale SA - 32 (Tovilović, 2004 in order to comply with our respondents' age and vocabulary. The data indicated that social anxiety at age 12 -13 is primarily manifested as shyness and the importance placed on the impression that one makes on his/her social environment. Both factors were positively correlated with the positive attitude towards designer clothes indicating that among 12 to 13 year old Serbian children wearing designer clothes enhances personal esteem and attractiveness in the eyes of other group members. At this age, the attitude towards designer clothes can be, at least partially, explained by a belief that conspicuous consumption contributes to increased social acceptance and the feelings of personal respect and safety.

  7. The C-12/C-13 abundance ratio in Comet Halley

    International Nuclear Information System (INIS)

    Wyckoff, S.; Lindholm, E.; Wehinger, P.A.; Peterson, B.A.; Zucconi, J.M.

    1989-01-01

    The individual (C-13)N rotational lines in Comet Halley are resolved using high-resolution spectra of the CN B2Sigma(+)-X2Sigma(+) (0,0) band. The observe C-12/C-13 abundance ratio excludes a site of origin for the comet near Uranus and Neptune and suggests a condensation environment quite distinct from other solar system bodies. Two theories are presented for the origin of Comet Halley. One theory suggest that the comet originated 4.5 Gyr ago in an inner Oort cloud at a heliocentric distance greater than 100 AU where chemical fractionation led to the C-13 enrichment in the CN parent molecule prior to condensation of the comet nucleus. According to the other, more plausible theory, the comet nucleus condensed relatively recently from the interstellar medium which has become enriches in C-13 and was subsequently gravitationally captured by the solar system. 107 refs

  8. Structure of the unbound systems: 10,12Li and 13Be

    International Nuclear Information System (INIS)

    Randisi, G.

    2011-12-01

    The unbound systems 10;12 Li and 13 Be have been studied via nucleon removal from a 14 B beam of 35 MeV/nucleon. The invariant mass (decay energy) spectra were reconstructed from the measured 9;11 Li-n and 12 Be-n coincidences. Simulations, taking into account the effects of the experimental setup and the reaction, were developed. The reconstructed decay energy spectra were interpreted using theoretical lineshapes folded with the experimental response, as well as uncorrelated distributions obtained from the data by event mixing. In the case of 10 Li, the data were reproduced with an s-wave virtual state of scattering length a s = [-10 -3 +1 (stat) ±3 (syst)] fm and l = 1 resonance with energy E r = [0.55 ± 0.02 (stat) ± 0.05 (syst)] MeV and with Γ 0 = [0.35 ± 0.05 (stat) ± 0.15 (syst)] MeV confirming the ν1p 1/2 - ν2s 1/2 inversion. For 12 Li, evidence was found for excited states between 0.2 and 0.8 MeV above the threshold. In the case of 13 Be, the decay energy, as well as the other observables, were reproduced assuming an l = 0 resonance with E r = [0.70 ± 0.05 (stat) ± 0.07 (syst)] MeV and Γ 0 = [1.7 ± 0.1 (stat) ± 0.1 (syst)] MeV and l = 2 resonance with E r = [2.4 ± 0.1(stat) ± 0.1 (syst)] MeV and Γ 0 = [0.6 ± 0.2 (stat) ± 0.1 (syst)] MeV. This hypothesis is supported by the selectivity of proton knockout, whereby the neutron configuration of the states populated in 13 Be should directly reflect that of 14 B. (author)

  9. High technology at 'General Turbo', DH 12/13 balance-over speed testing stand

    International Nuclear Information System (INIS)

    Nuta, Florian Nicolae; Vasiliu, Dinu; Mauna, Traian

    2005-01-01

    'General Turbo' activity started in 1970 including building the balancing and over speed stand. DH 12/13 is the latest up-to-date facility of this type, the best one of the five in Europe, and was commissioned in 2004. The facility was especially built to be used for Romanian Nuclear Power Plant rotor testing and also for thermal very big rotors. The paper underlines the main attributes and the components of the facility DH 12/13 based on the Schenck technology. (authors)

  10. [Acceptance of a total smoking ban in schools: students' attitudes].

    Science.gov (United States)

    Morgenstern, M; Wiborg, G; Hanewinkel, R

    2008-06-01

    The purpose of this study was to measure students' attitudes towards a total smoking ban in schools and towards impositions in cases of violation. Cross-sectional survey of 1 738 students of 12 public schools in Schleswig-Holstein (grades 7-13, age 11-20 years). Data were collected by means of written questionnaires administered during class time. The following variables were assessed: attitude towards smoking ban, attitude towards impositions, age, sex, citizenship, perceived school climate, current smoking, lifetime smoking; for smokers, and additionally, the "Heaviness of Smoking Index". 76.5% of all students agreed with a total smoking ban, 66.4% agreed with the punishment of violations. Higher acceptance rates were found among girls, young students (11-15 years of age), for never-smokers, and for students who feel comfortable at school. Acceptance of the smoking ban is closely related to current smoking status: 93% of the non-smoking students, but only 14% of the daily smoking students agreed with the regulations. Refusal of the ban increased with increasing physical dependence. The intensification of the smoking ban in public schools meets approval by the majority of students. Smoking students should be more strongly involved in the implementation process, e.g., by supplemental cessation programmes.

  11. Prader-Willi syndrome due to an unbalanced de novo translocation [t(15;19)(q12;p13.3)

    Science.gov (United States)

    Dang, Vy; Surampalli, Abhilasha; Manzardo, Ann M; Youn, Stephanie; Butler, Merlin G; Gold, June-Anne; Kimonis, Virginia

    2018-01-01

    Background and Aims Prader-Willi syndrome (PWS) is a complex, multisystem genetic disorder characterized by endocrine, neurologic and behavioral abnormalities. We report the first case of an unbalanced de-novo reciprocal translocation of chromosome 15 and 19: 45,XY,-15, der (19)t(15;19)(q12;p13.3) resulting in monosomy for the PWS chromosome critical region. We performed high resolution SNP microarray to characterize the breakpoints. Case report Our patient had several typical features for PWS including infantile hypotonia, a poor suck and feeding difficulties, tantrums, skin picking, compulsions, small hands and feet and food seeking but not hypopigmentation, a micropenis, cryptorchidism or obesity as common findings seen in PWS at the time of examination at 6 years of age. He had seizures noted from 1 to 3 years of age and marked cognitive delay. Results High resolution SNP microarray analysis identified an atypical PWS Type I deletion of chromosome 15 involving proximal breakpoint BP1. The deletion extended beyond the GABRB3 gene but was proximal to the usual distal breakpoint (BP3) within the 15q11-q13 region and GABRA5, GABRG3 and OCA2 genes were intact. Conclusion We report a case with atypical features for PWS associated with an unbalanced de-novo reciprocal translocation resulting in monosomy for the 15q11.1–15q12 with intact GABRA5, GABRG3 and OCA2 genes. No deletion of 19p13.3 band was detected therefore the patient was not at an increased risk of tumors from Peutz-Jeghers syndrome associated with a deletion of the STK11 gene. PMID:27894106

  12. A new, high energy rechargeable lithium ion battery with a surface-treated Li1.2Mn0.54Ni0.13Co0.13O2 cathode and a nano-structured Li4Ti5O12 anode

    International Nuclear Information System (INIS)

    Liu, Xiaoyu; Huang, Tao; Yu, Aishui

    2015-01-01

    Through elaborate design, a new rechargeable lithium ion battery has been developed by comprising a surface-treated Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode and a nano-structured Li 4 Ti 5 O 12 anode. After precondition Na 2 S 2 O 8 treatment, the initial coulombic efficiency of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode has been significantly increased and can be compatible with that of the nano-structured Li 4 Ti 5 O 12 anode. The optimization of structure and morphology for both active electrode materials result in their remarkable electrochemical performances in respective lithium half-cells. Ultimately, the rechargeable lithium ion full battery consisting of both electrodes delivers a specific capacity of 99.0 mAh g −1 and a practical energy density of 201 Wh kg −1 , based on the total weight of both active electrode materials. Furthermore, as a promising candidate in the lithium ion battery field, this full battery also achieves highly attractive electrochemical performance with high coulombic efficiency, excellent cycling stability and outstanding rate capability. Thus the proposed battery displays broad practical application prospects for next generation of high-energy lithium ion battery. - Highlights: • The Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode is surface-treated by Na 2 S 2 O 8 . • The nano-sized Li 4 Ti 5 O 12 anode is obtained by a solid-state method. • A new Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 /Li 4 Ti 5 O 12 lithium ion battery is developed. • The battery shows high coulombic efficiency, specific capacity and energy density. • The battery shows high capacity retention rate and good high-rate capability

  13. Students' science attitudes, beliefs, and context: associations with science and chemistry aspirations

    Science.gov (United States)

    Mujtaba, Tamjid; Sheldrake, Richard; Reiss, Michael J.; Simon, Shirley

    2018-04-01

    There is a widespread concern that relatively few students, especially those from disadvantaged backgrounds, continue to study chemistry and other science subjects after compulsory education. Yet it remains unclear how different aspects of students' background and home context, their own attitudes and beliefs, and their experiences of particular teaching approaches in school might limit or facilitate their studying aspirations; concurrently, less research has specifically focused on and surveyed disadvantaged students. In order to gain more insight, 4780 students were surveyed, covering those in Year 7 (age 11-12 years) and in Year 8 (age 12-13) from schools in England with high proportions of those from disadvantaged backgrounds. Predictive modelling highlighted that the students' aspirations to study non-compulsory science in the future, and to study the particular subject of chemistry, were strongly associated with their extrinsic motivation towards science (their perceived utility of science, considered as a means to gain particular careers or skills), their intrinsic interest in science, and their engagement in extra-curricular activities. Additionally, their self-concept beliefs (their confidence in their own abilities in science), some teaching approaches, and encouragement from teachers and family alongside family science capital had smaller but still relevant associations.

  14. 12/13 signaling promotes cervical cancer invasion through the RhoA/ROCK-JNK signaling axis

    International Nuclear Information System (INIS)

    Yuan, Bo; Cui, Jinquan; Wang, Wuliang; Deng, Kehong

    2016-01-01

    Several reports have indicated a role for the members of the G12 family of heterotrimeric G proteins (Gα12 and Gα13) in oncogenesis and tumor cell growth. The aims of the present study were to evaluate the role of G12 signaling in cervical cancer. We demonstrated that expression of the G12 proteins was highly upregulated in cervical cancer cells. Additionally, expression of the activated forms of Gα12/Gα13 but not expression of activated Gαq induced cell invasion through the activation of the RhoA family of G proteins, but had no effect on cell proliferation in the cervical cancer cells. Inhibition of G12 signaling by expression of the RGS domain of the p115-Rho-specific guanine nucleotide exchange factor (p115-RGS) blocked thrombin-stimulated cell invasion, but did not inhibit cell proliferation in cervical cells, whereas the inhibition of Gαq (RGS2) had no effect. Furthermore, G12 signaling was able to activate Rho proteins, and this stimulation was inhibited by p115-RGS, and Gα12-induced invasion was blocked by an inhibitor of RhoA/B/C (C3 toxin). Pharmacological inhibition of JNK remarkably decreased G12-induced JNK activation. Both a JNK inhibitor (SP600125) and a ROCK inhibitor (Y27632) reduced G12-induced JNK and c-Jun activation, and markedly inhibited G12-induced cellular invasion. Collectively, these findings demonstrate that stimulation of G12 proteins is capable of promoting invasion through RhoA/ROCK-JNK activation. -- Highlights: •Gα12/Gα13 is upregulated in cervical cancer cell lines. •Gα12/Gα13 is not involved in cervical cancer cell proliferation. •Gα12/Gα13 promotes cervical cancer cell invasion. •The role of Rho G proteins in G12-promoted cervical cancer cell invasion. •G12 promotes cell invasion through activation of the ROCK-JNK signaling axis.

  15. Age patterns of smoking initiation among Kuwait university male students.

    Science.gov (United States)

    Sugathan, T N; Moody, P M; Bustan, M A; Elgerges, N S

    1998-12-01

    The present study is a detailed evaluation of age at smoking initiation among university male students in Kuwait based on a random sample of 664 students selected from all students during 1993. The Acturial Life Table analysis revealed that almost one tenth of the students initiated cigarette smoking between ages 16 and 17 with the rate of initiation increasing rapidly thereafter and reaching 30% by age 20 and almost 50% by the time they celebrate their 24th birthday. The most important environmental risk factor positively associated for smoking initiation was observed to be the history of smoking among siblings with a relative risk of 1.4. Compared to students of medicine and engineering, the students of other faculties revealed a higher risk in smoking initiation with an RR = 1.77 for sciences and commerce and 1.61 for other faculties (arts, law, education and Islamic studies). The analysis revealed a rising generation trend in cigarette smoking. There is a need for reduction of this trend among young adults in Kuwait and throughout other countries in the region.

  16. Attitudes of early adolescent age students towards physical education

    Directory of Open Access Journals (Sweden)

    Lazarević Dušanka

    2015-01-01

    Full Text Available Studies have shown that a positive attitude towards physical education (PE is in connection with students' engagement in PE classes and with the development of an active lifestyle. The objective of this study was to examine attitudes of early adolescent age students towards physical education, as well as to examine whether such attitudes vary with regard to gender, grade they attend and students' engagement in sport and physical exercises in extracurricular activities. The research was conducted on the sample of 531 students from 6th to 8th grade. The instrument Student's Attitudes toward Physical Education - SATPE was used to measure student's attitude towards PE. A special questionnaire was used to collect data on gender, grade and engagement in sport and physical exercising outside school. The results have shown that students have positive attitudes of moderate intensity towards physical education. MANOVA has shown that male students have more positive attitudes than female students, as well as that positivity of attitudes declines with age. Likewise, it was shown that students with more positive attitudes towards PE are more often engaged in physical exercises outside school. The connection between the attitude towards PE and involvement in organized sport was not confirmed. The paper presents suggestions for further research of students' attitude towards PE and its connection with physical activity of students.

  17. CARD15 single nucleotide polymorphisms 8, 12 and 13 are not increased in ethnic Danes with sarcoidosis

    DEFF Research Database (Denmark)

    Milman, Nils; Nielsen, Ole Haagen; Hviid, Thomas Vauvert F

    2007-01-01

    and SNP13, respectively, were performed by capillary electrophoresis single-strand confirmation polymorphism in 53 patients with histologically verified sarcoidosis and in 103 healthy controls. RESULTS: The frequencies of CARD15 mutations in sarcoidosis patients were: SNP8, 4/106 chromosomes (3.8%); SNP12...... with Crohn's disease. OBJECTIVES: To evaluate whether ethnic Danes with sarcoidosis have an increased frequency of CARD15 mutations compared to healthy control subjects. METHODS: Genotyping for CARD15 mutations R702W, G908R, and L1007fsinsC, also designated single nucleotide polymorphism (SNP) SNP8, SNP12......, 2/106 chromosomes (1.9%); SNP13, 2/106 chromosomes (1.9%); SNP8+SNP12+SNP13, 8/106 chromosomes (7.6%). All 8 patients were heterozygous. The frequencies in controls were: SNP8, 9/206 chromosomes (4.4%); SNP12, 2/206 chromosomes (1.0%); SNP13, 4/206 chromosomes (1.9%); SNP8+SNP12+SNP13, 15...

  18. O{sub 2} adsorption and dissociation on the Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) tri-metallic nanoparticles: A DFT study

    Energy Technology Data Exchange (ETDEWEB)

    Li, Sha; Yang, Yongpeng; Huang, Shiping, E-mail: huangsp@mail.buct.edu.cn

    2017-07-15

    Highlights: • O{sub 2} adsorption and dissociation on Pd{sub 13-n}Ni{sub n}@Pt{sub 42} NPs are performed by DFT. • Adsorption energies of O{sub 2} and O are strongly affected by the coordination number. • Adsorption energy and d-band center displays the opposite change tendency. • Ni{sub 13}@Pt{sub 42} is the most active catalyst among Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) NPs. - Abstract: Density functional theory calculations are performed to investigate O{sub 2} adsorption and dissociation on the icosahedral Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) tri-metallic nanoparticles. The parallel adsorption of O{sub 2} on Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) is stronger than the vertical adsorption. The adsorption of O{sub 2} on the bridge site (B1) is favorable in the Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) nanoparticles, while the adsorption of O atom on the hollow site (H1) is preferred. The adsorption energies of O{sub 2} and O are strongly affected by the coordination number. Low coordination site shows strong adsorption of O{sub 2} and O on the Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) nanoparticles. The adsorption energies of O{sub 2} and O atoms are found to be correlated well with the d-band center of surface Pt. For the Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and13) nanoparticles catalysts, the ORR activity follows the order of Ni{sub 13}@Pt{sub 42} > Pd{sub 13}@Pt{sub 42} > Pd{sub 12}Ni{sub 1}@Pt{sub 42} > Pd{sub 1}Ni{sub 12}@Pt{sub 42}, illustrating that the Ni{sub 13}@Pt{sub 42} is the strongest ORR activity among the Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and13) nanoparticles catalysts. Our results have important significance to understand the mechanism of O{sub 2} dissociation on the Pd{sub 13-n}Ni{sub n}@Pt{sub 42} (n = 0, 1, 12, and 13) tri-metallic nanoparticles.

  19. Evaluation of Oral and Dental Health among 12 Year-Old Students in Jolfa, East Azerbaijan

    Directory of Open Access Journals (Sweden)

    Safooreh Esmaeilzadeh

    2017-02-01

    Full Text Available Background and Objectives: Twelve year-old is selected as the global indicator of age group to compare and monitor oral diseases at the international level. The aim of this study was to assess the state of oral health in the 12 year-old students to determine their needs and design oral health prevention programs in Jolfa. Material and Methods: This cross-sectional descriptive-analytic study was done on 146 students, with 12 years of age that were selected on a multistage cluster sampling method through the seven health centers which provided health services to schools in 2014 academic year in Jolfa city. Data were collected through interview and dental clinical examination using World Health Organization Oral Health Assessment Form for Children, 2013 questionnaire that consists of two parts: 1 demographic information and 2 the mouth status, including: dentition status, periodontal status, dental erosion, dental trauma, oral mucosa. Data were analyzed using SPSS version 16 software and applying descriptive statistics (Mean and Frequency, chi-square tests and logistic regression. Results: The mean of DMFT in the studied population was 4.30 ± 2.93 with 4.38 ± 2.26 for the boys and 4.21 ± 3.60 for the girls. According to the results, 92.5% of the students had at least one decayed tooth and 85.6% of those surveyed had at least one of the first permanent molar. Also, a significant association was observed between male gender and  tooth decay (P value Conclusion: The results of this study showed poor oral health status in the students of Jolfa and needs to serious attention to community-based health programs in education and implementation of preventive dentistry.

  20. Dielectron spectroscopy at 1-2 AGeV with HADES

    International Nuclear Information System (INIS)

    Spataro, S.; Agakishiev, G.; Destefanis, M.; Gilardi, C.; Kirschner, D.; Kuehn, W.; Lange, J.S.; Metag, V.; Mishra, D.; Novotny, R.; Pechenov, V.; Pechenova, O.; Perez Cavalcanti, T.; Spruck, B.; Wen, H.; Agodi, C.; Bellia, G.; Finocchiaro, P.; Balanda, A.; Dybczak, A.; Kozuch, A.; Michalska, B.; Otwinowski, J.; Przygoda, W.; Salabura, P.; Trebacz, R.; Wisniowski, M.; Wojcik, T.; Belver, D.; Cabanelas, P.; Castro, E.; Garzon, J.A.; Lamas-Valverde, J.; Marin, J.; Belyaev, A.; Chernenko, S.; Fateev, O.; Ierusalimov, A.; Zanevsky, Y.; Blanco, A.; Fonte, P.; Lopes, L.; Mangiarotti, A.; Boehmer, M.; Christ, T.; Eberl, T.; Fabbietti, L.; Friese, J.; Gernhaeuser, R.; Jurkovic, M.; Kruecken, R.; Maier, L.; Sailer, B.; Boyard, J.L.; Hennino, T.; Moriniere, E.; Ramstein, B.; Roy-Stephan, M.; Braun-Munzinger, P.; Galatyuk, T.; Gonzalez-Diaz, D.; Holzmann, R.; Koenig, I.; Koenig, W.; Kolb, B.W.; Lang, S.; Palka, M.; Pietraszko, J.; Rustamov, A.; Schmah, A.; Simon, R.; Sudol, M.; Traxler, M.; Yurevich, S.; Zumbruch, P.; Diaz, J.; Gil, A.; Dohrmann, F.; Grosse, E.; Kaempfer, B.; Kanaki, K.; Kotte, R.; Naumann, L.; Wuestenfeld, J.; Zhou, P.; Froehlich, I.; Heilmann, M.; Lorenz, M.; Markert, J.; Micel, J.; Muentz, C.; Pachmayer, Y.C.; Stroebele, H.; Sturm, C.; Tarantola, A.; Teilab, K.; Golubeva, M.; Guber, F.; Ivashkin, A.; Karavicheva, T.; Kurepin, A.; Lapidus, K.; Reshetin, A.; Sadovsky, A.; Veretenkin, I.; Iori, I.; Krasa, A.; Krizek, F.; Kugler, A.; Sobolev, Yu.G.; Tlusty, P.; Wagner, V.; Mousa, J.; Parpottas, Y.; Tsertos, H.; Stroth, J.

    2008-01-01

    The HADES spectrometer at GSI (Darmstadt) is investigating the e + e - pair production in p+p, p+A and A+A collisions. In this contribution we would like to highlight the physics motivations and the experiments performed so far, focusing mainly on the first results coming from 12 C+ 12 C collisions at 1 and 2 AGeV, and on preliminary results from p+p/d+p collisions at 1.25 AGeV. (orig.)

  1. Asthma prevalence among high school students in East Jakarta, 2001, based on ISAAC questionnaire

    Directory of Open Access Journals (Sweden)

    Faisal Yunus

    2003-09-01

    Full Text Available The aim of this study was to assess asthma prevalence in children between 13-14 years of age in East Jakarta. This study is a cross sectional study which surveyed 2234 high school students between the ages of 13 and 14 years in East Jakarta in 2001 using the ISAAC questionnaire. Bronchial challenge test was applied by using methacholine substance to 186 students. Reports based on the ISAAC questionnaire indicate that 7.2% of teenage have had wheezing experience, 4.1% have wheezing within the last 12 months, 1.8% have ever suffered severe asthma attack within the last 12 months, 3.3% have suffered wheezing after exercise, and 6.3% have got night cough while they were not suffering from cold. Prevalence of atopy diseases such as rhinitis and eczema were 14.2% and 3.9%, meanwhile rhinitis and eczema prevalence within the last 12 months according to this study were 10.6% and 2.9% respectively. Statistically, there is a significant correlation between wheezing symptom and atopy (p < 0.05. From indepth questionnaire, a significant value of kappa 0.84 related with wheezing within the last 12 months was found. Bronchial challenge test results indicate that sensitivity was 90%, specificity 83.58%, positive predictive value 68.12% and negative predictive value was 95.73%. Asthma prevalence in East Jakarta at 2001 based on ISAAC questionnaire was 8.9%, and cumulative prevalence 11.5%. The ISAAC questionnaire can be used to study asthma prevalence in children at multicenter in Indonesia. (Med J Indones 2003; 12: 178-86Keywords: bronchial challenge, high school student, ISAAC questionnaire, East Jakarta, asthma prevalence

  2. BMI, waist circumference at 8 and 12 years of age and FVC and FEV1 at 12 years of age; the PIAMA birth cohort study

    NARCIS (Netherlands)

    Bekkers, Marga B; Wijga, Alet H; Gehring, Ulrike; Koppelman, Gerard H; de Jongste, Johan C; Smit, Henriette A; Brunekreef, Bert

    2015-01-01

    BACKGROUND: In adults, overweight is associated with reduced lung function, in children evidence on this association is conflicting. We examined the association of body mass index (BMI) and waist circumference (WC) at age 12, and of persistently (at ages 8 and 12 years) high BMI and large WC, with

  3. 13 CFR 125.12 - May an SDVO SBC have affiliates?

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false May an SDVO SBC have affiliates... CONTRACTING PROGRAMS Eligibility Requirements for the SDVO SBC Program § 125.12 May an SDVO SBC have affiliates? A concern may have affiliates provided that the aggregate size of the concern and all its...

  4. Professor Age and Gender Affect Student Perceptions and Grades

    Science.gov (United States)

    Joye, Shauna W.; Wilson, Janie H.

    2015-01-01

    Student evaluations provide rich information about teaching performance, but a number of factors beyond teacher effectiveness influence student evaluations. In this study we examined the effects of professor gender and perceived age on ratings of effectiveness and rapport as well as academic performance. We also asked students to rate professor…

  5. 12/15 Lipoxygenase regulation of colorectal tumorigenesis is determined by the relative tumor levels of its metabolite 12-HETE and 13-HODE in animal models.

    Science.gov (United States)

    Chang, Jian; Jiang, Li; Wang, Yinqiu; Yao, Bing; Yang, Shilin; Zhang, Bixiang; Zhang, Ming-Zhi

    2015-02-20

    Colorectal cancer (CRC) continues to be a major cause of morbidity and mortality. The arachidonic acid (AA) pathway and linoleic acid (LA) pathway have been implicated as important contributors to CRC development and growth. Human 15-lipoxygenase 1 (15-LOX-1) converts LA to anti-tumor 13-S-hydroxyoctadecadienoic acid (13-HODE)and 15-LOX-2 converts AA to 15-hydroxyeicosatetraenoic acid (15-HETE). In addition, human 12-LOX metabolizes AA to pro-tumor 12-HETE. In rodents, the function of 12-LOX and 15-LOX-1 and 15-LOX-2 is carried out by a single enzyme, 12/15-LOX. As a result, conflicting conclusions concerning the role of 12-LOX and 15-LOX have been obtained in animal studies. In the present studies, we determined that PD146176, a selective 15-LOX-1 inhibitor, markedly suppressed 13-HODE generation in human colon cancer HCA-7 cells and HCA-7 tumors, in association with increased tumor growth. In contrast, PD146176 treatment led to decreases in 12-HETE generation in mouse colon cancer MC38 cells and MC38 tumors, in association with tumor inhibition. Surprisingly, deletion of host 12/15-LOX alone led to increased MC38 tumor growth, in association with decreased tumor 13-HODE levels, possibly due to inhibition of 12/15-LOX activity in stroma. Therefore, the effect of 12/15-LOX on colorectal tumorigenesis in mouse models could be affected by tumor cell type (human or mouse), relative 12/15 LOX activity in tumor cells and stroma as well as the relative tumor 13-HODE and 12-HETE levels.

  6. Dielectron spectroscopy at 1-2 AGeV with HADES

    Energy Technology Data Exchange (ETDEWEB)

    Spataro, S. [Istituto Nazionale di Fisica Nucleare, Lab. Nazionali del Sud, Catania (Italy)]|[Justus Liebig Univ. Giessen, II.Physikalisches Institut, Giessen (Germany); Agakishiev, G.; Destefanis, M.; Gilardi, C.; Kirschner, D.; Kuehn, W.; Lange, J.S.; Metag, V.; Mishra, D.; Novotny, R.; Pechenov, V.; Pechenova, O.; Perez Cavalcanti, T.; Spruck, B.; Wen, H. [Justus Liebig Univ. Giessen, II.Physikalisches Inst., Giessen (Germany); Agodi, C.; Bellia, G.; Finocchiaro, P. [Istituto Nazionale di Fisica Nucleare, Lab. Nazionali del Sud, Catania (Italy); Balanda, A.; Dybczak, A.; Kozuch, A.; Michalska, B.; Otwinowski, J.; Przygoda, W.; Salabura, P.; Trebacz, R.; Wisniowski, M.; Wojcik, T. [Jagiellonian Univ. of Cracow, Smoluchowski Inst. of Physics, Krakow (Poland); Belver, D.; Cabanelas, P.; Castro, E.; Garzon, J.A.; Lamas-Valverde, J.; Marin, J. [Univ. of Santiago de Compostela, Dept. de Fisica de Particulas, Santiago de Compostela (Spain); Belyaev, A.; Chernenko, S.; Fateev, O.; Ierusalimov, A.; Zanevsky, Y. [Joint Inst. of Nuclear Research, Dubna (Russian Federation); Blanco, A.; Fonte, P.; Lopes, L.; Mangiarotti, A. [LIP-Lab. de Instrumentacao e Fisica Experimental de Particulas, Coimbra (Portugal); Boehmer, M.; Christ, T.; Eberl, T.; Fabbietti, L.; Friese, J.; Gernhaeuser, R.; Jurkovic, M.; Kruecken, R.; Maier, L.; Sailer, B. [Technische Univ. Muenchen, Physik Department E12, Muenchen (Germany); Boyard, J.L.; Hennino, T.; Moriniere, E.; Ramstein, B.; Roy-Stephan, M. [Univ. Paris Sud, Inst. de Physique Nucleaire (UMR 8608), CNRS/IN2P3, Orsay Cedex (France); Braun-Munzinger, P.; Galatyuk, T.; Gonzalez-Diaz, D.; Holzmann, R.; Koenig, I.; Koenig, W.; Kolb, B.W.; Lang, S.; Palka, M.; Pietraszko, J.; Rustamov, A.; Schmah, A.; Simon, R.; Sudol, M.; Traxler, M.; Yurevich, S.; Zumbruch, P. [Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany); Diaz, J.; Gil, A. [Univ. de Valencia-CSIC, Inst. de Fisica Corpuscular, Valencia (Spain)] [and others

    2008-11-15

    The HADES spectrometer at GSI (Darmstadt) is investigating the e {sup +}e{sup -} pair production in p+p, p+A and A+A collisions. In this contribution we would like to highlight the physics motivations and the experiments performed so far, focusing mainly on the first results coming from {sup 12}C+{sup 12}C collisions at 1 and 2 AGeV, and on preliminary results from p+p/d+p collisions at 1.25 AGeV. (orig.)

  7. A partial preterist understanding of Revelation 12-13 within an ...

    African Journals Online (AJOL)

    To solve these conflicting opinions, intertextual views are applied to Rev. 12-13. We have observed that two main intertextual tensions arise. These are the conflict between John's intertextuality and that of his audiences on the one hand, and on the other hand, the different views held by the Jewish Christians and the Gentile ...

  8. C-12/C-13 Ratio in Ethane on Titan and Implications for Methane's Replenishment

    Science.gov (United States)

    Jennings, Donald E.; Romani, Paul N.; Bjoraker, Gordon L.; Sada, Pedro V.; Nixon, Conor A.; Lunsford, Allen W.; Boyle, Robert J.; Hesman, Brigette E.; McCabe, George H.

    2009-01-01

    The C-12/C-13 abundance ratio in ethane in the atmosphere of Titan has been measured at 822 cm(sup -1) from high spectral resolution ground-based observations. The value 89(8), coincides with the telluric standard and also agrees with the ratio seen in the outer planets. It is almost identical to the result for ethane on Titan found by the composite infrared spectrometer (CIRS) on Cassini. The C-12/C-13 ratio for ethane is higher than the ratio measured in atmospheric methane by Cassini/Huygens GCMS, 82.3(l), representing an enrichment of C-12 in the ethane that might be explained by a kinetic isotope effect of approximately 1.1 in the formation of methyl radicals. If methane is being continuously resupplied to balance photochemical destruction, then we expect the isotopic composition in the ethane product to equilibrate at close to the same C-12/C-13 ratio as that in the supply. The telluric value of the ratio in ethane then implies that the methane reservoir is primordial.

  9. Association between Sleep Duration and Overweight/Obesity at Age 7–18 in Shenyang, China in 2010 and 2014

    Directory of Open Access Journals (Sweden)

    Qi Sun

    2018-04-01

    Full Text Available This study was designed to examine the association between sleep duration and being overweight/obese in primary, middle, and high school students. This was a multiple cross-sectional study using data from the 2010 and 2014 National Survey on Students’ Constitution and Health (CNSSCH. A total of 23,602 students aged 7–18 years were enrolled in this study. The prevalence of being overweight and obese—stratified by age, gender, and sleep duration—in 2010 and 2014 were compared. Sleep duration was categorized as <7 h, ≥7 to 8 h, ≥8 to 9 h, and ≥9 h. Overweight and obesity were defined according to the cut-point criteria in China. Multivariable logistic regression results in 2010 and 2014 revealed that students sleeping <7 h and aged 7–12 years had an increased risk of becoming overweight/obese. In 2010, the adjusted prevalence ratios of overweight for 7–12-year-old students sleeping <9 h was 1.196 (95%CI: 1.004–1.424 and 13–15-year-old students sleeping <8 h was 1.265 (95%CI: 1.023–1.565. In 2014, the adjusted prevalence ratios of overweight and obesity for 7–12-year-old students sleeping <9 h were 1.295 (95%CI: 1.091–1.537 and 1.231 (95%CI: 1.045–1.449; 16–18-year-old students sleeping <7 h were 1.530 (95%CI: 1.239–1.888 and 1.585 (95%CI: 1.270–2.081. Our study revealed that different levels of sleep curtailment increased the risk of becoming overweight/obesity in different age groups of students.

  10. Stigmatised Learners: Mature-Age Students Negotiating University Culture

    Science.gov (United States)

    Mallman, Mark; Lee, Helen

    2016-01-01

    Research on the socially-situated nature of learning shows how practices and identities are affected by participation in communities, but very little is known about how mature-age students experience the relational dynamics of university. Based on data from a qualitative study of first-year students, we consider written accounts by older learners…

  11. Raman spectroscopy of isotopically pure ({sup 12}C, {sup 13}C) and isotopically mixed ({sup 12.5}C) diamond single crystals at ultrahigh pressures

    Energy Technology Data Exchange (ETDEWEB)

    Enkovich, P. V., E-mail: enkovich@hppi.troitsk.ru; Brazhkin, V. V.; Lyapin, S. G.; Novikov, A. P. [Russian Academy of Sciences, Troitsk, Institute for High-Pressure Physics (Russian Federation); Kanda, H. [National Institute for Materials Science (Japan); Stishov, S. M. [Russian Academy of Sciences, Troitsk, Institute for High-Pressure Physics (Russian Federation)

    2016-09-15

    The Raman scattering by isotopically pure {sup 12}C and {sup 13}C diamond single crystals and by isotopically mixed {sup 12.5}C diamond single crystals is studied at a high accuracy. The studies are performed over a wide pressure range up to 73 GPa using helium as a hydrostatic pressure-transferring medium. It is found that the quantum effects, which determine the difference between the ratio of the Raman scattering frequencies in the {sup 12}C and {sup 13}C diamonds and the classical ratio (1.0408), increase to 30 GPa and then decrease. Thus, inversion in the sign of the quantum contribution to the physical properties of diamond during compression is detected. Our data suggest that the maximum possible difference between the bulk moduli of the {sup 12}C and {sup 13}C diamonds is 0.15%. The investigation of the isotopically mixed {sup 12.5}C diamond shows that the effective mass, which determines the Raman frequency, decreases during compression from 12.38 au at normal pressure to 12.33 au at 73 GPa.

  12. [Suicidal behavior prevention for children under age 13: A systematic review].

    Science.gov (United States)

    Baux-Cazal, L; Gokalsing, E; Amadeo, S; Messiah, A

    2017-05-01

    Our objective was to review international literature on suicidal behavior prevention for children under age 13. We gathered all relevant articles on suicide prevention for children under 13. We researched all publications in the French and English languages in PubMed (MEDLINE), PsychINFO and SUDOC databases published until February 2014, with the keywords "child", "child preschool", "prevention and control", "suicide", and "suicide attempted". Publications were included if they described suicidal behavior prevention programs (suicide prevention programs, attempted-suicide prevention programs, suicidal ideation screening programs), and if the studies concerned children under age 13. We also included references cited in the articles if they were not already present in our searches but met inclusion criteria. Studies were excluded if they analyzed populations of children and adolescents without sub-analysis for children under age 13. A total of 350 potentially relevant articles were identified, 33 of which met the inclusion criteria, including 4 retrieved from articles' bibliography. Preventive measures against suicidal behavior for children under 13 exist and include: social programs, maltreatment prevention, curriculum-based suicide prevention programs, suicide screening in schools, gatekeepers, reduction of access of lethal means of suicide, suicide screening by primary care, and post-suicide intervention programs. Overall, the evidence was limited by methodological concerns, particularly a lack of RCTs. However, positive effects were found: school-based suicide prevention programs and gatekeepers increased knowledge about suicide and how to seek help, post-suicide programs helped to reduce psychological distress in the short term. One study showed a decreased risk of attempted-suicide after entry into the child welfare system. There are promising interventions but there is not enough scientific evidence to support any efficient preventive measure against

  13. Animal products and K-ras codon 12 and 13 mutations in colon carcinomas

    NARCIS (Netherlands)

    Kampman, E.; Voskuil, D.W.; Kraats, A.A. van; Balder, H.F.; Muijen, G.N.P. van; Goldbohm, R.A.; Veer, P. van 't

    2000-01-01

    K-ras gene mutations (codons 12 and 13) were determined by PCR-based mutant allele-specific amplification (MASA) in tumour tissue of 185 colon cancer patients: 36% harboured mutations, of which 82% were located in codon 12. High intakes of animal protein, calcium and poultry were differently

  14. Anti-ageing effects of a new synthetic sphingolipid (K6EAA-L12) on aged murine skin.

    Science.gov (United States)

    Jung, Minyoung; Lee, Sanghoon; Park, Hwa-young; Youm, Jong-Kyung; Jeong, Sekyoo; Bae, Jonghwan; Kwon, Mi Jung; Park, Byeong Deog; Lee, Seung Hun; Choi, Eung Ho

    2011-04-01

    Recently, we reported on the anti-ageing effects of K6PC-5. This compound induced keratinocyte differentiation and fibroblast proliferation by increasing sphingosine-1 phosphate synthesis. We performed this study to confirm the anti-ageing effects of new synthetic products (the K6EAA series) derived from K6PC-5 through an amino group induction. Cellular responses such as differentiation, proliferation and calcium mobilization were investigated using cultured human keratinocytes and fibroblasts. Also, we measured the expressions of collagen mRNA and protein using real time RT-PCR and ELISA, respectively. The K6EAA-L12 product, selected by in vitro screening, was evaluated for anti-ageing effects on intrinsically and extrinsically (photo) aged models of hairless mice. In the intrinsically aged murine skin, K6EAA-L12 showed anti-ageing effects by activating collagen synthesis, eventually causing dermal thickening. Also, in the photo-aged skin, the dermal collagen density and dermal thickness were increased. In photo-aged murine skin, K6EAA-L12 increased stratum corneum integrity by increasing corneodesmosome density and improved the barrier recovery rate. However, there were no changes in the expressions of epidermal differentiation maker proteins. In conclusion, topical K6EAA-L12, a new synthetic K6PC-5 derivative, improves intrinsically and extrinsically (photo) aged skin by increasing the collagen density and improving the skin barrier function. © 2011 John Wiley & Sons A/S.

  15. Prader-Willi Syndrome due to an Unbalanced de novo Translocation t(15;19)(q12;p13.3).

    Science.gov (United States)

    Dang, Vy; Surampalli, Abhilasha; Manzardo, Ann M; Youn, Stephanie; Butler, Merlin G; Gold, June-Anne; Kimonis, Virginia E

    2016-01-01

    Prader-Willi syndrome (PWS) is a complex, multisystem genetic disorder characterized by endocrine, neurologic, and behavioral abnormalities. We report the first case of an unbalanced de novo reciprocal translocation of chromosomes 15 and 19, 45,XY,-15,der(19)t(15;19)(q12;p13.3), resulting in monosomy for the PWS critical chromosome region. Our patient had several typical features of PWS including infantile hypotonia, a poor suck and feeding difficulties, tantrums, skin picking, compulsions, small hands and feet, and food seeking, but not hypopigmentation, a micropenis, cryptorchidism or obesity as common findings seen in PWS at the time of examination at 6 years of age. He had seizures noted from 1 to 3 years of age and marked cognitive delay. High-resolution SNP microarray analysis identified an atypical PWS type I deletion in chromosome 15 involving the proximal breakpoint BP1. The deletion extended beyond the GABRB3 gene but was proximal to the usual distal breakpoint (BP3) within the 15q11q13 region, and GABRA5, GABRG3, and OCA2 genes were intact. No deletion of band 19p13.3 was detected; therefore, the patient was not at an increased risk of tumors from the Peutz-Jeghers syndrome associated with a deletion of the STK11 gene. © 2016 S. Karger AG, Basel.

  16. Biomotor status and kinesiological education of girls aged 10 to 12 years--example: volleyball.

    Science.gov (United States)

    Milić, Mirjana; Grgantov, Zoran; Katić, Ratko

    2012-09-01

    The aim of this study was to define processes of orientation and/or selection towards sports game of volleyball in schoolgirls of Kastela, aged 10-12, by examining the relations between regular classes of physical education (PE) and extracurricular sport activities. For this purpose, two morphological measures were used (body height and body mass) and a set of 11 motor tests (6 basic motor abilities tests and 5 motor achievement tests) on a sample of 242 girls aged 10-12 was used, divided into a subsample of 42 girls participating in volleyball training (Volleyball players) and a subsample of 200 girls who do not participate in volleyball training (volleyball non-players). Based on the comparison of test results of schoolgirls from Kastela and Croatian norms, factor analysis of applied variables and discriminant analysis of these variables between volleyball players and non-players, processes and/or phases of selection in forming quality volleyball players were defined. Selection processes are preceded by orientation processes in physical education classes, i.e. choosing those sport activities which are in accordance with the biomotor status of students. Results have shown that orientation and initial selection in female volleyball needs to be executed based on the motor set of psychomotor speed, repetitive strength of the trunk and flexibility (muscle tone regulation), and body height. Volleyball training has affected the muscle mass development and the development of strength factors, so that explosive strength of jumping and/or takeoff along with body height, has predominantly differentiated female volleyball players from non-players, aged 10 to 12, and serve and spike quality will have dominant influence on the match outcome.

  17. Coating effect of LiFePO4 and Al2O3 on Li1.2Mn0.54Ni0.13Co0.13O2 cathode surface for lithium ion batteries

    Science.gov (United States)

    Seteni, Bonani; Rapulenyane, Nomasonto; Ngila, Jane Catherine; Mpelane, Siyasanga; Luo, Hongze

    2017-06-01

    Lithium-manganese-rich cathode material Li1.2Mn0.54Ni0.13Co0.13O2 is prepared by combustion method, and then coated with nano-sized LiFePO4 and nano-sized Al2O3 particles via a wet chemical process. The as-prepared Li1.2Mn0.54Ni0.13Co0.13O2, LiFePO4-coated Li1.2Mn0.54Ni0.13Co0.13O2 and Al2O3-coated Li1.2Mn0.54Ni0.13Co0.13O2 are characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The scanning electron microscopy shows the agglomeration of the materials and their nanoparticle size ∼100 nm. The transmission electron microscopy confirms that LiFePO4 forms a rough mat-like surface and Al2O3 remain as islandic particles on the surface of the Li1.2Mn0.54Ni0.13Co0.13O2 material. The Li1.2Mn0.54Ni0.13Co0.13O2 coated with LiFePO4 and Li1.2Mn0.54Ni0.13Co0.13O2 coated with Al2O3 exhibits improved electrochemical performance. The initial discharge capacity is enhanced to 267 mAhg-1 after the LiFePO4 coating and 285 mAhg-1 after the Al2O3 coating compared to the as-prepared Li1.2Mn0.54Ni0.13Co0.13O2 material that has an initial discharge capacity of 243 mAhg-1. Galvanostatic charge-discharge tests at C/10 display longer activation of Li2MnO3 phase and higher capacity retention of 88% after 20 cycles for Li1.2Mn0.54Ni0.13Co0.13O2-LiFePO4 compared to Li1.2Mn0.54Ni0.13Co0.13O2-Al2O3 of 80% after 20 cycles and LMNC of 80% after 20 cycles. Meanwhile Li1.2Mn0.54Ni0.13Co0.13O2-LiFePO4 also shows higher rate capability compared to Li1.2Mn0.54Ni0.13Co0.13O2-Al2O3.

  18. PTF12os and iPTF13bvn: Two stripped-envelope supernovae from low-mass progenitors in NGC 5806

    International Nuclear Information System (INIS)

    Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Fraser, M.

    2016-01-01

    Context. In this paper, we investigate two stripped-envelope supernovae (SNe) discovered in the nearby galaxy NGC 5806 by the (intermediate) Palomar Transient Factory [(i)PTF]. These SNe, designated PTF12os/SN 2012P and iPTF13bvn, exploded within ~520 days of one another at a similar distance from the host-galaxy center. We classify PTF12os as a Type IIb SN based on our spectral sequence; iPTF13bvn has previously been classified as Type Ib having a likely progenitor with zero age main sequence (ZAMS) mass below ~17 M ⊙ . Because of the shared and nearby host, we are presented with a unique opportunity to compare these two SNe. Aims. Our main objective is to constrain the explosion parameters of iPTF12os and iPTF13bvn, and to put constraints on the SN progenitors. We also aim to spatially map the metallicity in the host galaxy, and to investigate the presence of hydrogen in early-time spectra of both SNe. Methods. We present comprehensive datasets collected on PTF12os and iPTF13bvn, and introduce a new automatic reference-subtraction photometry pipeline (FPipe) currently in use by the iPTF. We perform a detailed study of the light curves (LCs) and spectral evolution of the SNe. The bolometric LCs are modeled using the hydrodynamical code hyde. We analyze early spectra of both SNe to investigate the presence of hydrogen; for iPTF13bvn we also investigate the regions of the Paschen lines in infrared spectra. We perform spectral line analysis of helium and iron lines to map the ejecta structure of both SNe. We use nebular models and late-time spectroscopy to constrain the ZAMS mass of the progenitors. We also perform image registration of ground-based images of PTF12os to archival HST images of NGC 5806 to identify a potential progenitor candidate. Results. We find that our nebular spectroscopy of iPTF13bvn remains consistent with a low-mass progenitor, likely having a ZAMS mass of ~12M ⊙ . Our late-time spectroscopy of PTF12os is consistent with a ZAMS mass of ~15

  19. Prevalence of molar incisor hypomineralization in school children aged 8-12 years in Chennai

    Directory of Open Access Journals (Sweden)

    Savitha Deepthi Yannam

    2016-01-01

    Full Text Available Objective: To investigate the prevalence and severity of molar incisor hypomineralization (MIH. Materials and Methods: A sample of 2,864 students aged 8-12 years were selected from government and private schools in Chennai. MIH was diagnosed clinically based on the diagnostic criteria established by the European Academy of Pediatric Dentistry (EAPD 2003. Results: A total of 277 children (9.7% had MIH. There was statistically significant difference in prevalence related to age but there was no statistical difference in prevalence with respect to gender. Conclusion: Prevalence of MIH was 9.7% in the child population residing in Chennai. Males and females were equally affected. The rate of occurrence and severity of MIH are more in the right mandibular first molar. The severity of MIH is more in molars compared to incisors (P < 0.001 and is more in government schools compared to private schools (P = 0.002.

  20. Mechanisms responsible for two possible electrochemical reactions in Li1.2Ni0.13Mn0.54Co0.13O2 used for lithium ion batteries

    Science.gov (United States)

    Konishi, Hiroaki; Hirano, Tatsumi; Takamatsu, Daiko; Gunji, Akira; Feng, Xiaoliang; Furutsuki, Sho; Okumura, Takefumi; Terada, Shohei; Tamura, Kazuhisa

    2018-02-01

    Two electrochemical reactions are possible in regard to Li1.2Ni0.13Mn0.54Co0.13O2 (0.5Li2MnO3-0.5LiNi0.33Mn0.33Co0.33O2), viz, Li2MnO3-like and LiNi0.33Mn0.33Co0.33O2-like reactions. The open circuit potential (OCP) and changes in crystal structure during the charge-discharge process of Li1.2Ni0.13Mn0.54Co0.13O2 were investigated to clarify the mechanism responsible for the two reactions. Li2MnO3 and LiNi0.33Mn0.33Co0.33O2 were separately prepared for the investigation, and the OCPs and crystal structures in these cathodes were measured and then compared with those for Li1.2Ni0.13Mn0.54Co0.13O2. The results obtained using X-ray diffraction (XRD) indicated that two phases existed in Li1.2Ni0.13Mn0.54Co0.13O2. The changes in crystal structure of the two phases during the charge-discharge process were similar to those in Li2MnO3 and LiNi0.33Mn0.33Co0.33O2. This indicated that two phases, viz, Li2MnO3-like and LiNi0.33Mn0.33Co0.33O2-like, existed in Li1.2Ni0.13Mn0.54Co0.13O2. Li2MnO3-like, LiNi0.33Mn0.33Co0.33O2-like, and Li2MnO3-like phases were found to contribute mainly to electrochemical reactions in the low, middle, and high state of charge (SOC) ranges during the charge process from the results obtained using XRD and electrochemical measurements carried out on Li1.2Ni0.13Mn0.54Co0.13O2. In contrast, the Li2MnO3-like and LiNi0.33Mn0.33Co0.33O2-like phases mainly contributed to electrochemical reactions in the low and high SOC ranges during the discharge process. Furthermore, the high polarization and potential decay during the charge-discharge cycling of Li1.2Ni0.13Mn0.54Co0.13O2 were mainly attributed to the Li2MnO3-like phase.

  1. Effect of the PREPARE intervention on sexual initiation and condom use among adolescents aged 12–14: a cluster randomised controlled trial in Dar es Salaam, Tanzania

    Directory of Open Access Journals (Sweden)

    Elia John Mmbaga

    2017-04-01

    Full Text Available Abstract Background Unsafe sexual practices continue to put adolescents at risk for a number of negative health outcomes in Tanzania. While there are some effective theory-based intervention packages with positive impact on important mediators of sexual behaviours, a context specific and tested intervention is urgently needed in Tanzania. Purpose To develop and evaluate an intervention that will have a significant effect in reducing sexual initiation and promoting condom use among adolescents aged 12–14 in Dar es Salaam, Tanzania. Design A school-based Cluster Randomised Controlled Trial was conducted during 2011–2014 in Kinondoni Municipality. Methods A total of 38 public primary schools were randomly selected, of which half were assigned to the intervention and half to the control group based on their size and geographic location. Participants were interviewed using a self-administered questionnaire at baseline before the PREPARE intervention and then, 6 and 12 months following intervention. The primary outcomes were self-reported sex initiation and condom use during the past 6 months. Data analysis was done using Generalized Estimating Equation (GEE modelling controlling for repeated measures and clustering of students within schools. Results A total of 5091 students were recruited at baseline, and interviewed again at 6 (n = 4783 and 12 months (n = 4370. Mean age of participants at baseline was 12.4 years. Baseline sociodemographic, psychometric and behavioural characteristics did not significantly differ between the two study arms. The GEE analysis indicated that the intervention had a significant effect on sexual initiation in both sexes after controlling for clustering and correlated repeated measures. A significantly higher level of action planning to use condoms was reported among female adolescent in the intervention arm than those in the control arm (p = 0.042. An effect on condom use behaviour was observed among male

  2. Facebook Age Display and Alcohol Use among College Students

    Science.gov (United States)

    Wilner, Molly; Kerr, Bradley; Moreno, Megan

    2018-01-01

    Background: This study aimed to investigate the relationship between Facebook age presentation, Facebook alcohol displays, and alcohol related risk factors among college students. Methods: Students from two universities in the United States enrolled and accepted a researcher's Facebook friend request. Participant's Facebook profiles were evaluated…

  3. Socio-motivational moderators—two sides of the same coin? Testing the potential buffering role of socio-motivational relationships on achievement drive and test anxiety among German and Canadian secondary school students

    Science.gov (United States)

    Hoferichter, Frances; Raufelder, Diana; Eid, Michael

    2015-01-01

    The current cross-national study investigates the potential buffering role of socio-motivational relationships for the association of achievement drive (AD) and test anxiety (TX) in secondary school students from Canada and Germany. One thousand and eighty-eight students (54% girls, Mage = 13.71, SD = 0.53, age span 12–15 years) from the state of Brandenburg and 389 students from Quebéc (55.9% girls, Mage = 13.43, SD = 0.82, age span 12–16 years) were asked about their socio-motivational relationships with their teachers and peers, their drive for achievement, and TX. Multigroup latent moderated structural equations were conducted to test for the moderator role of socio-motivational relationships that would buffer feelings of TX related to the drive for achievement. The analyses revealed the two-sided role socio-motivational relationships can have for students with different levels of AD; intensifying or mitigating feelings of TX. Thereby, the results of this study extend the buffering hypothesis by Cohen and Wills (1985). Cross-national differences between Canada and Germany were found concerning the studied moderators on the association of AD and TX: While for German students teacher–student relationships acted as moderator, for Canadian students student–student relationships and teachers acting as positive motivators displayed a moderator role. PMID:26583000

  4. Serological Evidence of Exposure to Leptospira spp. in Veterinary Students and Other University Students in Trinidad and Tobago

    Directory of Open Access Journals (Sweden)

    Ambrose James

    2013-01-01

    Full Text Available The study compared the serological evidence of leptospirosis in 212 students in four schools (veterinary, dental, advanced nursing education and pharmacy of the University of the West Indies (UWI, by testing for IgG immunoglobulins to Leptospira spp. using the enzyme-linked immunosorbent assay (ELISA and the microscopic agglutination test (MAT. Overall, of 212 students tested by the ELISA, 12 (5.7% and 31 (14.6% were positive and borderline, respectively. Amongst the 113 veterinary students 11 (9.7% and 19 (16.8% were seropositive and borderline respectively compared with nonveterinary students with corresponding values of 1 (1.0% and 12 (12.1%. The frequency of serological evidence of leptospirosis by the ELISA was statistically significantly (; higher in veterinary students, 26.5% (30 of 113 than in nonveterinary students, 13.1% (13 of 99. By the MAT, the seropositivity for leptospirosis was similar for veterinary students, 7.1% (8 of 113 and nonveterinary students, 7.1% (7 of 99. For veterinary students, the prevalent infecting serovar was Icterohaemorrhagiae Copenhageni while amongst nonveterinary students, the prevalent serovar was Australis Rachmati. Being a veterinary student was the only risk factor that was significantly associated with Leptospira infection indicating that veterinary students need to be cognizant and to practise preventive measures for leptospirosis.

  5. Promoting Oral Health in 6-12 Year-Old Students: A Systematic Review

    Directory of Open Access Journals (Sweden)

    Seyed Mohammad Mehdi Hazavehei

    2015-03-01

    Full Text Available Background and Objectives: The group of 6-12 year-old students are the main target of oral health programs due to the high prevalence of dental caries and the formation of permanent teeth during this age and the lifestyle-shaping nature of the period. Schools provide the easiest and most effective means of accessing this group. The present study was conducted to examine the impact of school-based interventions on improved oral health in 6-12 year-old students. Materials and Methods: The present systematic review searched for its English and Persian keywords in databases such as the Scopus, Proquest, Science Direct, Pubmed, Springer, Biomed Central, Google Scholar, IranMedex and SID and examined studies published between January 2004 and September 2014 about educational interventions aiming to prevent oral diseases and promote associated health behaviors in students. Results: The 17 studies selected for examination were divided into two categories: first, assessing an education based on self-care behaviors and preventive services second, assessing an education based on self-care behaviors only. Those interventions that were consistent in nature, involved the parents and the school personnel, used behavior change models, used a combination of several training methods, used practical experiences and provided preventive services were more effective in promoting knowledge and health behaviors and reducing dental caries and plaque in this group of children. Conclusion: Providing consistent community-based education, using a combination of several organized educational programs, following up on the children's progress, using behavior change theories and models and providing prevention services are the most effective measures for achieving the desired goals.

  6. CERN Shop - Christmas Sale on 12 and 13 December

    CERN Document Server

    2007-01-01

    Looking for Christmas present ideas? As every year, we will be running a CERN Shop stand in the Main Building, ground floor, on Wednesday 12 and Thursday 13 December from 10.30 to 16.30. Some new items will be on sale, such as cool fridge magnets and fleeces. The 2008 CERN calendar will be also available at the price of 10 CHF. Some items will have special reductions. Come and visit the CERN Shop stand and find your Christmas presents. DSU-CO group

  7. Age differences in outcomes among patients in the "Stimulant Abuser Groups to Engage in 12-Step" (STAGE-12) intervention.

    Science.gov (United States)

    Garrett, Sharon B; Doyle, Suzanne R; Peavy, K Michelle; Wells, Elizabeth A; Owens, Mandy D; Shores-Wilson, Kathy; DiCenzo, Jessica; Donovan, Dennis M

    2018-01-01

    Emerging adults (roughly 18-29years) with substance use disorders can benefit from participation in twelve-step mutual-help organizations (TSMHO), however their attendance and participation in such groups is relatively low. Twelve-step facilitation therapies, such as the Stimulant Abuser Groups to Engage in 12-Step (STAGE-12), may increase attendance and involvement, and lead to decreased substance use. Analyses examined whether age moderated the STAGE-12 effects on substance use and TSMHO meeting attendance and participation. We utilized data from a multisite randomized controlled trial, with assessments at baseline, mid-treatment (week 4), end-of-treatment (week 8), and 3- and 6- months post-randomization. Participants were adults with DSM-IV diagnosed stimulant abuse or dependence (N=450) enrolling in 10 intensive outpatient substance use treatment programs across the U.S. A zero-inflated negative binomial random-effects regression model was utilized to examine age-by-treatment interactions on substance use and meeting attendance and involvement. Younger age was associated with larger treatment effects for stimulant use. Specifically, younger age was associated with greater odds of remaining abstinent from stimulants in STAGE-12 versus Treatment-as-Usual; however, among those who were not abstinent during treatment, younger age was related to greater rates of stimulant use at follow-up for those in STAGE-12 compared to TAU. There was no main effect of age on stimulant use. Younger age was also related to somewhat greater active involvement in different types of TSMHO activities among those in STAGE-12 versus TAU. There were no age-by-treatment interactions for other types of substance use or for treatment attendance, however, in contrast to stimulant use; younger age was associated with lower odds of abstinence from non-stimulant drugs at follow-up, regardless of treatment condition. These results suggest that STAGE-12 can be beneficial for some emerging adults

  8. Teaching Problem Solving Skills to Elementary Age Students with Autism

    Science.gov (United States)

    Cote, Debra L.; Jones, Vita L.; Barnett, Crystal; Pavelek, Karin; Nguyen, Hoang; Sparks, Shannon L.

    2014-01-01

    Students with disabilities need problem-solving skills to promote their success in solving the problems of daily life. The research into problem-solving instruction has been limited for students with autism. Using a problem-solving intervention and the Self Determined Learning Model of Instruction, three elementary age students with autism were…

  9. CACA-TOCSY with alternate 13C-12C labeling: a 13Cα direct detection experiment for mainchain resonance assignment, dihedral angle information, and amino acid type identification

    International Nuclear Information System (INIS)

    Takeuchi, Koh; Frueh, Dominique P.; Sun, Zhen-Yu J.; Hiller, Sebastian; Wagner, Gerhard

    2010-01-01

    We present a 13 C direct detection CACA-TOCSY experiment for samples with alternate 13 C- 12 C labeling. It provides inter-residue correlations between 13 C α resonances of residue i and adjacent C α s at positions i - 1 and i + 1. Furthermore, longer mixing times yield correlations to C α nuclei separated by more than one residue. The experiment also provides C α -to-sidechain correlations, some amino acid type identifications and estimates for ψ dihedral angles. The power of the experiment derives from the alternate 13 C- 12 C labeling with [1,3- 13 C] glycerol or [2- 13 C] glycerol, which allows utilizing the small scalar 3 J CC couplings that are masked by strong 1 J CC couplings in uniformly 13 C labeled samples.

  10. CACA-TOCSY with alternate 13C–12C labeling: a 13Cα direct detection experiment for mainchain resonance assignment, dihedral angle information, and amino acid type identification

    Science.gov (United States)

    Takeuchi, Koh; Frueh, Dominique P.; Sun, Zhen-Yu J.; Hiller, Sebastian

    2010-01-01

    We present a 13C direct detection CACA-TOCSY experiment for samples with alternate 13C–12C labeling. It provides inter-residue correlations between 13Cα resonances of residue i and adjacent Cαs at positions i − 1 and i + 1. Furthermore, longer mixing times yield correlations to Cα nuclei separated by more than one residue. The experiment also provides Cα-to-sidechain correlations, some amino acid type identifications and estimates for ψ dihedral angles. The power of the experiment derives from the alternate 13C–12C labeling with [1,3-13C] glycerol or [2-13C] glycerol, which allows utilizing the small scalar 3JCC couplings that are masked by strong 1JCC couplings in uniformly 13C labeled samples. PMID:20383561

  11. Energy Retrofit for Aging K-12 Schools.

    Science.gov (United States)

    3D/International, Houston, TX.

    Successfully retrofitting aging K-12 schools using energy conservation measures (ECM) that can improve the physical plant and reduce energy consumption are explored. Topics explore how certain ECM measures can benefit educational facilities, why retrofitting begun sooner rather than later is important, how to finance the retrofit program, and the…

  12. Bismarck in the Bush: Year 12 Write Zambia's History for Zambian Students

    Science.gov (United States)

    Gray, Peter

    2011-01-01

    Peter Gray explains how his Year 12 students came to research and write a resource on the history of Zambia, for history teachers "in" Zambia. The construction of the resource stretched the Year 12 students in new ways: the Internet was useless and there were no easy digests in A-Level textbooks to get them started. They would have to…

  13. Age dynamic of physical condition changes in pre-school age girls, schoolgirls and students, living in conditions of Eastern Siberia

    Directory of Open Access Journals (Sweden)

    V.Y. Lebedinskiy

    2017-12-01

    Full Text Available Purpose: to analyze dynamic of physical condition, considering sex (females and age of the tested, living in region with unfavorable ecology. Material: we studied pre school age girls (n=1580, age 4-7 years. In the research we did not include children with chronic diseases, who were under observation. We tested schoolgirls (n=3211, age 7-17 years and girl students (n=5827, age 17-21 years, 1-4 years of study. Girl students were divided into five age groups: from 17 to 21 years. All participants lived in conditions of Eastern Siberia (Irkutsk. This region is characterized by unfavorable ecology and climate geographic characteristics. Results: in dynamic of physical condition of pre-school girls, schoolgirls and students we marked out three substantial periods of it characteristics' changes. Age 7-8 years is critical (transition from 1st to 2nd stage. The least values of these characteristics are found in older (after 17-18 years ages. In students we observed relative stabilization of these indicators. Conclusions: the received results shall be considered in building physical education training process in pre-school educational establishments, secondary comprehensive schools and higher educational establishments.

  14. 2011-12 National Postsecondary Student Aid Study (NPSAS:12). Price Estimates for Attending Postsecondary Education Institutions. First Look. NCES 2014-166

    Science.gov (United States)

    Simone, Sean; Radwin, David; Wine, Jennifer; Siegel, Peter; Bryan, Michael

    2013-01-01

    This First Look publication provides price estimates for attending postsecondary education institutions using data from the 2011-12 National Postsecondary Student Aid Study (NPSAS:12), the most comprehensive, nationally representative survey of student financing of postsecondary education in the United States. The survey includes about 95,000…

  15. Evaluation of DMFT Index in the 8-12 Years old Students of Zahedan City, Iran

    Directory of Open Access Journals (Sweden)

    Foroogh Amirabadi

    2015-05-01

    Full Text Available Background and purpose: Dental caries or tooth decay is one of the most important health problems in human life. In addition, tooth decay is an infectious disease that affects all populations Worldwide. The purpose of this study was to determine the decayed, missing and filled teeth (DMFT index among a representative sample of 8-12 years old school children in Zahedan City, Iran. Materials and Methods: This descriptive and cross-sectional study was performed in 2012-2013 on 1500 (774 girls and 726 boys 8-12 years old students were randomly selected in Zahedan City (South East of Iran to assess the DMFT index. The DMFT index was determined using the standard method suggested by World Health Organization (WHO and data were analyzed using SPSS software (version 18.0 and presented as mean ± standard deviation (SD. Results: It was observed that 43.6% of the individuals had at least one teeth lesion. The mean and SD of DMFT value for all ages was 1.02 ± 1.36. Male children had higher mean DMFT score of 1.01 ± 1.41 compared with 1.00 ± 1.41 for females (P > 0.05. Also, maximum DMFT (1.38 ± 1.62 was observed among students that never seen a dentist per year. Analysis of variance analysis showed that there is not a significant correlation between DMFT index and brushing times. Conclusion: According to the results of this study, the mean DMFT scores in 8-12 years old students are lower than the global standards suggested by WHO.

  16. 13th International Congress on Polymers in Concrete

    OpenAIRE

    Aguiar, J. L. Barroso de, ed. lit.; Jalali, Said, ed. lit.; Camões, Aires, ed. lit; Ferreira, Rui Miguel, ed. lit.; International Congress on Polymers in Concrete, 13, Madeira, 2010

    2010-01-01

    The 13th International Congress on Polymers in Concrete 2010 (13th ICPIC 2010) follows a series of 12 earlier successful congresses, which has been started in London in 1975. These congresses, being held every three years, played a key role in disseminating R&D findings between researchers, academics, industrials and students. The 13th ICPIC was again a forum to exchange knowledge and most recent research findings among participants. It represented a contribution to the development of this im...

  17. [Factors for sexual abuse during childhood and adolescence in students of Morelos, Mexico].

    Science.gov (United States)

    Chavez Ayala, Ruben; Rivera-Rivera, Leonor; Angeles-Llerenas, Angélica; Díaz-Cerón, Eva; Allen-Leigh, Betania; Ponce, Eduardo Lazcano

    2009-06-01

    To estimate the prevalence and factors associated with sexual abuse in childhood and adolescence. Study conducted in a sample of students in the state of Morelos, Mexico, in 2004-2005. Participants (n=1730) were drawn from a cohort of 13,293 students aged 12 to 24 years. Data were collected by means of a questionnaire comprising parts of validated scales. The variables studied were: sociodemographic (gender, living area, socioeconomic status), family (parental education, parental addictions, violence between parents), individual psychological factors (self-esteem assessed using the Coopersmith Self-Esteem Inventory, depression, alcohol consumption), intrafamily violence (assessed through Strauss Scale) and sexual abuse. Multiple logistic regression assessed the risk factors associated. Odds ratios (OR) with 95% confidence intervals were estimated. Of all students studied, 4.7% (n=80) reported attempted sexual abuse and 2.9% (n=50) were victims of consummated sexual abuse. Women had higher prevalence of attempted (6.1%) abuse; 3.6% of females and 1.9% of men were sexually abused. Main perpetrators were boyfriends in women and a stranger in men. Mean age was 12.02 years old among females and 11.71 years old among men. Factors found to be associated with abuse: high parental alcohol consumption (OR = 3.37, 95% CI 1.40;8.07), violence toward the mother (OR = 4.49, 95% CI 1.54;13.10), female gender (OR = 2.47, 95% CI 1.17;5.24), being a victim of great domestic violence (OR = 3.58, 95% CI 1.32;9.67). High self-esteem was a protective factor (OR = 0.27, 95% CI 0.09;0.75). Overall sexual abuse occurs at the age of 12 in both males and females, and it is more frequent among females. Most victims do not report abuse.

  18. Substance Abuse Treatment Admissions Aged 12 to 14. The TEDS Report

    Science.gov (United States)

    Substance Abuse and Mental Health Services Administration, 2011

    2011-01-01

    This report uses data from the Treatment Episode Data Set (TEDS) for 2008 to provide information on the characteristics of youths aged 12 to 14 admitted to substance abuse treatment. In 2008, approximately 23,770 substance abuse treatment admissions were adolescents aged 12 to 14. The two most frequently reported primary substances of abuse among…

  19. Sexual risk attitudes and intentions of youth aged 12-14 years: survey comparisons of parent-teen prevention and control groups.

    Science.gov (United States)

    Lederman, Regina P; Chan, Wenyaw; Roberts-Gray, Cynthia

    2004-01-01

    In this study, the authors compared differences in sexual risk attitudes and intentions for three groups of youth (experimental program, n = 90; attention control, n = 80; and nonparticipant control, n = 634) aged 12-14 years. Two student groups participated with their parents in programs focused on strengthening family interaction and prevention of sexual risks, HIV, and adolescent pregnancy. Surveys assessed students' attitudes and intentions regarding early sexual and other health-risk behaviors, family interactions, and perceived parental disapproval of risk behaviors. The authors used general linear modeling to compare results. The experimental prevention program differentiated the total scores of the 3 groups (p < .05). A similar result was obtained for student intentions to avoid sex (p < .01). Pairwise comparisons showed the experimental program group scored higher than the nonparticipant group on total scores (p < .01) and on students' intention to avoid sex (p < .01). The results suggest this novel educational program involving both parents and students offers a promising approach to HIV and teen pregnancy prevention.

  20. The Effect of Foreclosure on Boston Public School Student Academic Performance. Working Paper No. 13-12

    Science.gov (United States)

    Bradbury, Katharine; Burke, Mary A.; Triest, Robert K.

    2013-01-01

    Although the recent wave of mortgage foreclosures has clearly been accompanied by economic hardship, relatively little research has examined how foreclosures affect the academic performance of students. This paper investigates the relationship between mortgage foreclosures and the academic performance of students using a unique dataset that…

  1. [Knowledge of Human Papillomavirus Infection and the Possibilities for Prevention among 13- to 21-Year-Old Students from Fulda, Hessen].

    Science.gov (United States)

    Stumm, C; Hahn, D; Heberlein, I; Doherr, F; Hofmann, W

    2017-05-01

    Study Aim: The aim of this investigation was to assess awareness and knowledge of HPV and HPV vaccination in a sample of female and male students from Fulda. Further vaccination uptake was investigated. Methods: In 2011 a regional cross-sectional survey of 13- to 21-year-old students (n=1 515) was conducted by using a standardised questionnaire. Results: Overall, the awareness and knowledge of human papillomavirus (HPV) was poor. 29% of the sample had heard of HPV. Multivariate analyses demonstrate that females as well as Christians knew HPV better than males and Muslims. Mean HPV knowledge score was 7.8 of 21 (SD=3.3). None of the tested sociodemographic variables was a predictor for better HPV knowledge. 77% of the sample was aware of the HPV vaccination. Females, persons without migration background as well as persons with middle or higher education knew HPV vaccination better than males, persons with migration background and lower educational level. Mean HPV vaccination knowledge score of the female students was 2.9 of 5 (SD=1.3). Older female students had a better level of knowledge than younger ones. 30% of the females had received at least one dose. Higher age, no migration background and middle or higher education status were tested as significant predictors of vaccine uptake. Conclusion: School lessons and consultations would be appropriate places to transfer knowledge in order to prevent health inequalities caused by social determinants. © Georg Thieme Verlag KG Stuttgart · New York.

  2. CACA-TOCSY with alternate 13C-12C labeling: a 13Calpha direct detection experiment for mainchain resonance assignment, dihedral angle information, and amino acid type identification.

    Science.gov (United States)

    Takeuchi, Koh; Frueh, Dominique P; Sun, Zhen-Yu J; Hiller, Sebastian; Wagner, Gerhard

    2010-05-01

    We present a (13)C direct detection CACA-TOCSY experiment for samples with alternate (13)C-(12)C labeling. It provides inter-residue correlations between (13)C(alpha) resonances of residue i and adjacent C(alpha)s at positions i - 1 and i + 1. Furthermore, longer mixing times yield correlations to C(alpha) nuclei separated by more than one residue. The experiment also provides C(alpha)-to-sidechain correlations, some amino acid type identifications and estimates for psi dihedral angles. The power of the experiment derives from the alternate (13)C-(12)C labeling with [1,3-(13)C] glycerol or [2-(13)C] glycerol, which allows utilizing the small scalar (3)J(CC) couplings that are masked by strong (1)J(CC) couplings in uniformly (13)C labeled samples.

  3. Wildlife inventory of oil sand leases 12, 13 and 34

    International Nuclear Information System (INIS)

    Skinner, D.L.

    1996-01-01

    Results of a preliminary study to assess wildlife abundance and distribution on Syncrude's proposed oil sand leases 12, 13 and 34 were presented. The objective of the study was to determine the relative abundance and habitat preferences of different wildlife species. Aerial and track count surveys were conducted in winter. The abundance of hooved animals was determined using an aerial survey of the entire Syncrude area which is composed of conifer-dominated lowlands. Results of the surveys showed that wildlife abundance in the study area was typical of the Fort McMurray region. Thirteen habitat types were identified, including 2 types of upland deciduous forest, mixed wood forest, 4 types of coniferous forest, 2 types of wetland community, 3 types of riparian community and cleared peatland. The distribution of mammals in the study area was presented. This included distribution of hooved animals, small herbivores, large carnivores, small carnivores, and other furbearers. The habitat utilization of each wildlife species was discussed. Several habitat types were preferred by at least one species. Very few species were associated with deciduous and mixed wood forest. It was noted that winter track counts may not be indicative of habitat preferences and distribution during other important periods such as breeding and natal seasons. 69 refs., 12 tabs., 13 figs

  4. Associations between overweight, peer problems, and mental health in 12-13-year-old Norwegian children.

    Science.gov (United States)

    Hestetun, Ingebjørg; Svendsen, Martin Veel; Oellingrath, Inger Margaret

    2015-03-01

    Overweight and mental health problems represent two major challenges related to child and adolescent health. More knowledge of a possible relationship between the two problems and the influence of peer problems on the mental health of overweight children is needed. It has previously been hypothesized that peer problems may be an underlying factor in the association between overweight and mental health problems. The purpose of the present study was to investigate the associations between overweight, peer problems, and indications of mental health problems in a sample of 12-13-year-old Norwegian schoolchildren. Children aged 12-13 years were recruited from the seventh grade of primary schools in Telemark County, Norway. Parents gave information about mental health and peer problems by completing the extended version of the Strength and Difficulties Questionnaire (SDQ). Height and weight were objectively measured. Complete data were obtained for 744 children. Fisher's exact probability test and multiple logistic regressions were used. Most children had normal good mental health. Multiple logistic regression analysis showed that overweight children were more likely to have indications of psychiatric disorders (adjusted OR: 1.8, CI: 1.0-3.2) and peer problems (adjusted OR: 2.6, CI: 1.6-4.2) than normal-weight children, when adjusted for relevant background variables. When adjusted for peer problems, the association between overweight and indications of any psychiatric disorder was no longer significant. The results support the hypothesis that peer problems may be an important underlying factor for mental health problems in overweight children.

  5. Coping Strategies at the Ages 8, 10 and 12

    Science.gov (United States)

    Zsolnai, Aniko; Kasik, Laszlo; Braunitzer, Gabor

    2015-01-01

    The aim of the cross-sectional study was to reveal what coping strategies 8, 10- and 12-year-old Hungarian students (N?=?167) use in situations that are frustrating, either for themselves or their peers. The coping strategies in school situations were assessed by our own questionnaires. The instrument enables the investigation of the following…

  6. 12/15 lipoxygenase regulation of colorectal tumorigenesis is determined by the relative tumor levels of its metabolite 12-HETE and 13-HODE in animal models

    OpenAIRE

    Chang, Jian; Jiang, Li; Wang, Yinqiu; Yao, Bing; Yang, Shilin; Zhang, Bixiang; Zhang, Ming-Zhi

    2014-01-01

    Colorectal cancer (CRC) continues to be a major cause of morbidity and mortality. The arachidonic acid (AA) pathway and linoleic acid (LA) pathway have been implicated as important contributors to CRC development and growth. Human 15-lipoxygenase 1 (15-LOX-1) converts LA to anti-tumor 13-S-hydroxyoctadecadienoic acid (13-HODE)and 15-LOX-2 converts AA to 15-hydroxyeicosatetraenoic acid (15-HETE). In addition, human 12-LOX metabolizes AA to pro-tumor 12-HETE. In rodents, the function of 12-LOX ...

  7. Is age of menarche among school girls related to academic performance?

    Science.gov (United States)

    Al-Mathkoori, Radhia; Nur, Ula; Al-Taiar, Abdullah

    2017-06-17

    Background There is strong evidence that the mean age of menarche has declined over the last few decades in developed and developing countries. This is of a major concern because of its enormous public health implications. This study aimed to estimate the age of menarche in Kuwait and investigate the association between menarcheal age and academic performance among high school girls in Kuwait. Methods A cross-sectional study was conducted on randomly selected female high school students from private and public high schools in all governorates in Kuwait. Data on the age of menarche were collected by self-administered questionnaire from the students, while data on academic performance were extracted from the students' academic records. Results Of the 907 students we selected, 800 (88.2%) responded. The mean age of menarche was 12.33 [95% confidence interval (CI) 12.18-12.49] years. There was no evidence for significant association between age of menarche and students' academic performance before or after adjusting for potential confounders. Conclusion The calculated age of menarche among contemporary girls in Kuwait is similar to that of the girls in industrialized countries. Early menarcheal age is unlikely to lead to adverse behavior that may affect academic performance in our setting.

  8. Oral cleanliness of 12-13-year-old and 15-year-old school children of Sunsari District, Nepal

    Directory of Open Access Journals (Sweden)

    Yee R

    2006-09-01

    Full Text Available The aim of the study was to evaluate the oral cleanliness of school children in the District of Sunsari, Nepal. A multi-stage random sampling oral epidemiological survey was conducted in private and government, urban, rural town and rural village schools in 15 illakas of Sunsari District, Eastern Nepal. A total of 600, 12-13-year-old and 600 15-year-old school children were examined by trained examiners using the simplified oral hygiene index (OHI-S. The average age-group, debris and calculus index scores were combined to obtain the simplified oral hygiene index (OHI-S. The mean OHI-S scores were compared and evaluated using the parametric t-test for two independent samples. The mean OHI-S for urban 12-13-year-old school children was 0.98 compared to 1.34 for school children of rural towns and 1.44 for school children of rural villages and these differences in mean OHI-S were statistically significant ( P < 0.005. In the 15-year-old age group, urban school children had a mean OHI-S score of 1.00 compared to 1.37 for rural towns and 1.43 for rural villages. The variance in the mean OHI-S scores were statistically significant ( P < 0.005. The overall level of cleanliness in the school children surveyed was good. Children of urban schools had the lowest scores followed by school children from rural towns and then rural villages. When the mean OHI-S scores were compared with the DMFT scores, there was an inverse relationship between oral cleanliness and dental caries. Frequency of sugar consumption and the availability and affordability of fluoridated toothpaste may be important factors in the development of dental caries than oral cleanliness.

  9. Nutritional knowledge and habits of adolescents aged 9 to 13 years in Sharjah, United Arab Emirates: a crosssectional study.

    Science.gov (United States)

    Al-Yateem, Nabeel; Rossiter, Rachel

    2017-10-30

    Good nutritional knowledge and behaviour among adolescents is important to avoid health problems that can continue into adulthood. This cross-sectional study aimed to provide baseline data on nutritional knowledge and eating habits of adolescents in Sharjah. Data were collected from 300 adolescents aged 9-13 years attending 4 private schools using a validated self-administered questionnaire. Most students (86%) had poor nutritional knowledge, especially in key areas: nutritional terms, what constitutes healthy snacks and foods, daily nutritional requirements and components of food (e.g. fibre, fat, sugar). Only 34% of the students had healthy eating behaviour: 33% had eaten none or 1 vegetable only in the previous week, 25% had eaten unhealthy snacks 3 or more times, 19% had eaten frequently or daily at fast food outlets, and 36% had skipped breakfast frequently or daily. Culturally-specific, school-based educational interventions are warranted to build sound nutritional knowledge among adolescents and motivate the diet and behaviour changes needed to promote health throughout the lifespan.

  10. Isolated Learners: Young Mature-Age Students, University Culture, and Desire for Academic Sociality

    Science.gov (United States)

    Mallman, Mark; Lee, Helen

    2017-01-01

    The differentiated experiences of "young" mature-age students are under-researched and often unacknowledged in higher education literature and university policy. This article contends that, due to their age (early 20s to early 30s), many younger mature-age students feel "out of the loop" and "alienated" from…

  11. A Descriptive Study of Multicultural Elementary Student Playground Behaviors and Their Relationship to Gender, Age, Race and Socioeconomic Status.

    Science.gov (United States)

    Dahmes, Victoria M.

    This paper examines the observable play behaviors of elementary school students to determine how children interact within and among cultural groups. Observations were conducted during the recess period at an urban elementary school attended by 623 boys and girls age 6 through 12. Recess periods and play areas were segregated by grade and sex. Data…

  12. 13 CFR 143.12 - Special grant or subgrant conditions for “high-risk” grantees.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Special grant or subgrant conditions for âhigh-riskâ grantees. 143.12 Section 143.12 Business Credit and Assistance SMALL BUSINESS... or subgrantee: (1) Has a history of unsatisfactory performance, or (2) Is not financially stable, or...

  13. Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries

    Directory of Open Access Journals (Sweden)

    Lei Ming

    2018-04-01

    Full Text Available The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x (x = 0, 0.01, 0.03, 0.05 is prepared by traditional solid-phase method, and the Nb and F ions are successfully doped into Mn and O sites of layered materials Li1.2Mn0.54Co0.13Ni0.13O2, respectively. The incorporating Nb ion in Mn site can effectively restrain the migration of transition metal ions during long-term cycling, and keep the stability of the crystal structure. The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x shows suppressed voltage fade and higher capacity retention of 98.1% after 200 cycles at rate of 1 C. The replacement of O2− by the strongly electronegative F− is beneficial for suppressed the structure change of Li2MnO3 from the eliminating of oxygen in initial charge process. Therefore, the initial coulombic efficiency of doped Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x gets improved, which is higher than that of pure Li1.2Mn0.54Co0.13Ni0.13O2. In addition, the Nb and F co-doping can effectively enhance the transfer of lithium-ion and electrons, and thus improving rate performance.

  14. Socio-motivational moderators – Two sides of the same coin?Testing the potential buffering role of socio-motivational relationships on achievement drive and test anxiety among German and Canadian secondary school students

    Directory of Open Access Journals (Sweden)

    Frances eHoferichter

    2015-10-01

    Full Text Available The current cross-national study investigates the potential buffering role of socio-motivational relationships for the association of achievement drive and test anxiety in secondary school students from Canada and Germany. One thousand eighty-eight students (54% girls, Mage = 13.71, SD = .53, age span 12–15 years from the state of Brandenburg and 389 students from Quebéc (55.9% girls, Mage = 13.43, SD = .82, age span 12–16 years were asked about their socio-motivational relationships with their teachers and peers, their drive for achievement, and test anxiety. Multigroup latent moderated structural equations (MGLMS were conducted to test for the moderator role of socio-motivational relationships that would buffer feelings of test anxiety related to the drive for achievement. The analyses revealed the two-sided role socio-motivational relationships can have for students with different levels of achievement drive; intensifying or mitigating feelings of test anxiety. Thereby, the results of this study extend the buffering hypothesis by Cohen and Wills (1985. Cross-national differences between Canada and Germany were found concerning the studied moderators on the association of achievement drive and test anxiety: While for German students teacher-student relationships acted as moderator, for Canadian students student-student relationships and teachers acting as positive motivators displayed a moderator role.

  15. Postural reactions of girls and boys aged 12–15 years evaluated using the Romberg test

    Directory of Open Access Journals (Sweden)

    Jacek Wilczyński

    2016-07-01

    Full Text Available Introduction : The complex system controlling human posture includes a gaze stabilisation system, which comprises the control of direction and visual acuity during head and body movements, and a posture stabilisation system, keeping the body in balance at rest and in movement. Aim of the research: To analyse the postural reaction of SOX and SOY using the Romberg test with eyes open (EO and closed (CE in girls and boys aged 12–15 years. Material and methods : The study included 503 students of Primary School No. 13 and School No. 4 in Starachowice. Postural reactions were tested on a Cosmogamma platform by Emildue R50300. Postural reactions were analysed, and mean sway X (MSX and mean sway Y (MSY were calculated. Results: Analysis of variance showed significant differences of MSX only between girls and boys (p < 0.036. MSX was significantly lower in girls in both tests with EO and CE. Although there was no apparent significant difference of MSX between the Romberg test with EO and CE, a slight progression was observed in the test with CE. Analysis of variance of MSY with a single classification showed a significant effect of study options (p < 0.048, a significant interaction of gender and options of the study (p < 0.048, and a significant interaction of age and options of the study (p < 0.026. Analysis of variance of MSY showed a significant progression of MSY in the test with CE. Conclusions : Our research showed that balance with CE does not worsen, so it can be assumed that children have limited skills of using vision to maintain balance because there is a lack of appropriate coordination between vision and motor abilities, which in children are in development.

  16. Enhancement of Palmarumycins C(12) and C(13) production in liquid culture of endophytic fungus Berkleasmium sp. Dzf12 after treatments with metal ions.

    Science.gov (United States)

    Mou, Yan; Luo, Haiyu; Mao, Ziling; Shan, Tijiang; Sun, Weibo; Zhou, Kaiyi; Zhou, Ligang

    2013-01-07

    The influences of eight metal ions (i.e., Na+, Ca2+, Ag+, Co2+, Cu2+, Al3+, Zn2+, and Mn4+) on mycelia growth and palmarumycins C(12) and C(13) production in liquid culture of the endophytic fungus Berkleasmium sp. Dzf12 were investigated. Three metal ions, Ca2+, Cu2+ and Al3+ were exhibited as the most effective to enhance mycelia growth and palmarumycin production. When calcium ion (Ca2+) was applied to the medium at 10.0 mmol/L on day 3, copper ion (Cu2+) to the medium at 1.0 mmol/L on day 3, aluminum ion (Al3+) to the medium at 2.0 mmol/L on day 6, the maximal yields of palmarumycins C(12) plus C(13) were obtained as 137.57 mg/L, 146.28 mg/L and 156.77 mg/L, which were 3.94-fold, 4.19-fold and 4.49-fold in comparison with that (34.91 mg/L) of the control, respectively. Al3+ favored palmarumycin C(12) production when its concentration was higher than 4 mmol/L. Ca2+ had an improving effect on mycelia growth of Berkleasmium sp. Dzf12. The combination effects of Ca2+, Cu2+ and Al3+ on palmarumycin C(13) production were further studied by employing a statistical method based on the central composite design (CCD) and response surface methodology (RSM). By solving the quadratic regression equation between palmarumycin C(13) and three metal ions, the optimal concentrations of Ca2+, Cu2+ and Al3+ in medium for palmarumycin C(13) production were determined as 7.58, 1.36 and 2.05 mmol/L, respectively. Under the optimum conditions, the predicted maximum palmarumycin C(13) yield reached 208.49 mg/L. By optimizing the combination of Ca2+, Cu2+ and Al3+ in medium, palmarumycin C(13) yield was increased to 203.85 mg/L, which was 6.00-fold in comparison with that (33.98 mg/L) in the original basal medium. The results indicate that appropriate metal ions (i.e., Ca2+, Cu2+ and Al3+) could enhance palmarumycin production. Application of the metal ions should be an effective strategy for palmarumycin production in liquid culture of the endophytic fungus Berkleasmium sp. Dzf12.

  17. RESEARCH OF THE METABOLIC AGE AND BODY MASS INDEX FOR FEMALE STUDENTS

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    Galina Petrova Dyakova

    2011-09-01

    Full Text Available Metabolic age - this feature takes into account, the basic metabolism and all the basic physical parameters and the determining of age, which corresponds to this type of metabolism. The aim of the research is to establish a metabolic age and the index of the body mass (Body Mass Index for students. Anthropometric measurement was applied. The analyzer was used for the composition of body weight (body composition analyzer, BC-420MA “Tanita” for determining the metabolic age and body mass index. The conducted monitoring of the metabolic age reveals opportunities to improve students' motivation for healthy lifestyle.

  18. `Hard science': a career option for socially and societally interested students? Grade 12 students' vocational interest gap explored

    Science.gov (United States)

    Struyf, Annemie; Boeve-de Pauw, Jelle; Van Petegem, Peter

    2017-11-01

    A key theme in science education research concerns the decline in young peoples' interest in science and the need for professionals in hard science. Goal Congruity Theory posits that an important aspect of the decision whether to pursue hard science for study or as a career is the perception that hard science careers do not fulfil social (working with people) and societal (serving or helping others) interests. In this qualitative study, we explore grade 12 students' perceptions about the social and societal orientation of hard science careers. Furthermore, we investigate the variation in students' social and societal interests. Six focus groups were conducted with 58 grade 12 students in Flanders. Our results indicate that a number of students hold stereotypical views about hard science careers' social orientation, while others believe cooperation with others is an important aspect of hard science careers nowadays. Furthermore, our results show that students believe hard science careers can be societally oriented in the sense that they often associate them with innovation or societal progress. Finally, our results indicate that students may differentiate direct versus indirect societal orientation. These findings contribute to literature regarding social and societal interests and students' perceptions of hard science careers.

  19. Tequila authenticity assessment by headspace SPME-HRGC-IRMS analysis of 13C/12C and 18O/16O ratios of ethanol.

    Science.gov (United States)

    Aguilar-Cisneros, Blanca O; López, Mercedes G; Richling, Elke; Heckel, Frank; Schreier, Peter

    2002-12-18

    By use of headspace SPME sampling and a PLOT column, on-line capillary gas chromatography-isotope ratio mass spectrometry was employed in the combustion (C) and the pyrolysis (P) modes (HRGC-C/P-IRMS) to determine the delta(13)C(VPDB) and delta(18)O(VSMOW) values of ethanol in authentic (n = 14) and commercial tequila samples (n = 15) as well as a number of other spirits (n = 23). Whereas with delta(13)C(VPDB) values ranging from -12.1 to -13.2 per thousand and from -12.5 to -14.8 per thousand similar variations were found for 100% agave and mixed tequilas, respectively, the delta(18)O(VSMOW) data differed slightly within these categories: ranges from +22.1 to +22.8 per thousand and +20.8 to +21.7 per thousand were determined for both the authentic 100% agave and mixed products, respectively. The data recorded for commercial tequilas were less homogeneous; delta(13)C(VPDB) data from -10.6 to -13.9 per thousand and delta(18)O(VSMOW) values from +15.5 to +22.7 per thousand were determined in tequilas of both categories. Owing to overlapping data, attempts to differentiate between white, rested, and aged tequilas within each of the two categories failed. In addition, discrimination of tequila samples from other spirits by means of delta(13)C(VPDB) and delta(18)O(VSMOW) data of ethanol was restricted to the products originating from C(3) as well as C(4)/CAM raw materials.

  20. The prevalence of obesity among school-aged children and youth aged 6-18 years in Iran: A systematic review and meta-analysis study

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    Salman Khazaei

    2017-03-01

    Full Text Available BACKGROUND: Obesity is considered as a major health problem of children and adolescents. The present meta-analysis was conducted by extensive search of studies on the prevalence of obesity among school-aged children and youth aged 6-18 years in Iran. METHODS: All conducted cross-sectional studies on the prevalence of obesity in Iranian students in all grades were extracted, without applying any restriction on time in national and international databases including Magiran, Iranmedex, SID, Scopus, Google Scholar, and PubMed. Statistical software Stata 12 was used to analyze the data and to obtain the prevalence of obesity among Iranian students. The heterogeneity between the results was determined using statistical test I2. RESULTS: In this meta-analysis, 51 papers met our inclusion criteria and were therefore considered for the analysis. The prevalence of obesity was equal to 5.82% [95% confidence interval (CI: 5-6.66] in Iranian students. The prevalence of obesity was higher in boys than in girls (6.85% compared to 5.13% (P = 0.300. The highest prevalence of obesity was related to students living in the North and Northwest areas with 7.07% (95% CI: 4.35-9.78. CONCLUSION: The prevalence of obesity among Iranian students is not high when compared to Western countries. However, due to lifestyle changes in recent years, it is necessary to plan intervention programs within families and schools to improve dietary patterns and physical activity of this age group.  Normal 0 false false false EN-US X-NONE FA

  1. Encountering aged care: a mixed methods investigation of medical students' clinical placement experiences.

    Science.gov (United States)

    Annear, Michael J; Lea, Emma; Lo, Amanda; Tierney, Laura; Robinson, Andrew

    2016-02-04

    Residential aged care is an increasingly important health setting due to population ageing and the increase in age-related conditions, such as dementia. However, medical education has limited engagement with this fast-growing sector and undergraduate training remains primarily focussed on acute presentations in hospital settings. Additionally, concerns have been raised about the adequacy of dementia-related content in undergraduate medical curricula, while research has found mixed attitudes among students towards the care of older people. This study explores how medical students engage with the learning experiences accessible in clinical placements in residential aged care facilities (RACFs), particularly exposure to multiple comorbidity, cognitive impairment, and palliative care. Fifth-year medical students (N = 61) completed five-day clinical placements at two Australian aged care facilities in 2013 and 2014. The placements were supported by an iterative yet structured program and academic teaching staff to ensure appropriate educational experiences and oversight. Mixed methods data were collected before and after the clinical placement. Quantitative data included surveys of dementia knowledge and questions about attitudes to the aged care sector and working with older adults. Qualitative data were collected from focus group discussions concerning medical student expectations, learning opportunities, and challenges to engagement. Pre-placement surveys identified good dementia knowledge, but poor attitudes towards aged care and older adults. Negative placement experiences were associated with a struggle to discern case complexity and a perception of an aged care placement as an opportunity cost associated with reduced hospital training time. Irrespective of negative sentiment, post-placement survey data showed significant improvements in attitudes to working with older people and dementia knowledge. Positive student experiences were explained by in

  2. Prevalence and impact of headache and migraine among secondary school students in Nigeria.

    Science.gov (United States)

    Ofovwe, Gabriel E; Ofili, Antoinette N

    2010-11-01

    A cross-sectional descriptive study to determine the overall, age and gender specific prevalence, trigger factors and impact of headache and migraine on quality of life of students attending secondary schools in Benin City, Nigeria. Six secondary schools were randomly selected from which students were randomly selected. A self-administered questionnaire was used to screen those with frequent headache, defined as at least 2 episodes of headache unrelated to fever or any underlying disease within the last 12 months or at least 1 episode in the last 6 months preceding the date questionnaire was administered. Another questionnaire based on the ICHD-2 criteria for diagnosis of migraine was then administered to those with frequent headaches. Data analysis was with SPSS 13.0 for Windows. One thousand six hundred and seventy-nine students aged 11-18 years were recruited. The overall prevalence of headache was 19.5%. The prevalence of migraine was 13.5%. Migraine was more common in girls than in boys at all ages. The most common trigger factors included emotional stress, sunlight or bright light, sleep deprivation, and hunger. Inability to participate in outdoor activities, household chores, and school absenteeism were the common impacts on the quality of life of among 76.8% of the migraineurs. Migraine is common and underdiagnosed among secondary school students in Benin City, Nigeria, and negatively impacts on the quality of life including school absenteeism. © 2010 American Headache Society.

  3. CO2 and 12C:13C Isotopic Ratios on Phoebe and Iapetus

    Science.gov (United States)

    Clark, R. N.; Brown, R. H.; Cruikshank, D. P.

    2016-12-01

    Cassini VIMS has obtained spatially resolved 0.35 to 5.1 micron reflectance spectra of Saturn's satellites beginning with the Phoebe fly-by in 2004 and a close fly-by of Iapetus in 2007. Both surfaces contain relatively abundant CO2. The new (2016 RC19) calibration of VIMS has provided a significant increase in the data quality, such that isotopic absorption bands in CO2 are now well defined. CO2 on Saturn's icy satellites is trapped (Cruikshank et al., 2010, Icarus v206 p561; Pinilla-Alonso et al. 2011, Icarus v211, p75i), predominantly in the dark material (Clark et al. 2012, Icarus v218 p831). Clark et al. modeled the CO2 abundance as 2.8% on Iapetus and 3.7% on Phoebe. The main 12CO2 band in VIMS spectra on Iapetus occurs at 4.253 microns and Phoebe at 4.266 microns. The 13CO2 absorption is strong on Phoebe at 4.367 microns and weak on Iapetus at 4.387 microns. Converting the Phoebe, Iapetus, and a lab reflectance spectrum (of trace H2O-CO2 mixture on a diffuse substrate), we derive preliminary values for the ratio of the equivalent widths of the 12C and 13C absorptions as 19±2 on Phoebe, 82±8 on Iapetus, and 98±10 for the laboratory spectrum. These ratios are related to the 12C/13C ratio, but there may be effects due to intra-molecular and inter-molecular coupling that will contribute to systematic errors in the isotopic abundances derived using equivalent-width measurements that we've yet to quantify. We Believe the effects are small, and will be attempting to quantify them in the future. For comparison, the terrestrial value of the 12C/13C ratio is 90.17, and vibrational coupling may explain the slightly high lab mixture result. The local interstellar medium is 69±15 (Boogert et al., 2000, A&A). Because the CO2 bands on Phoebe and Iapetus dark material have different positions, and because the observed 13C absorption strengths are so different, the surface evolutions must be different. The large enrichment in 13C on Phoebe argues for significant

  4. A lower limit on the surface C-12/C-13 ratio in Alpha Orionis

    Science.gov (United States)

    Gautier, T. N., III; Fink, U.; Larson, H. P.; Thompson, R. I.

    1976-01-01

    The second overtone CO bands near 1.6 microns were analyzed in Alpha Ori using synthetic spectra. No firm identification of (C-13)O was made, which allowed a lower limit of 20 to be set on the C-12/C-13 ratio. A rather low microturbulent velocity of 2 km/s was found to match the spectrum of Alpha Ori best.

  5. Negative ageing stereotypes in students and faculty members from three health science schools.

    Science.gov (United States)

    León, Soraya; Correa-Beltrán, Gloria; Giacaman, Rodrigo A

    2015-06-01

    To explore the ageing stereotypes held by health students and faculty members in three health science schools in Chile. This cross-sectional study surveyed 284 students and faculty members from the dental, physical therapy and speech therapy schools of the University of Talca, Chile. A validated 15-question questionnaire about negative stereotypes was used (CENVE). The questions were divided into three categories: (i) health, (ii) social factors and motivation and (iii) character and personality. The scores for each category were grouped into the following categories: (i) positive, (ii) neutral and (iii) negative. Negative stereotypes were compared across genders, socio-economic status levels, classes, positions (student or faculty member) and schools. The majority of the participants held neutral stereotypes towards ageing, followed by positive perceptions. No differences were detected between the genders, schools or classes. While most of the students had neutral perceptions about ageing, the faculty's perceptions were rather positive (p = 0.0182). In addition, people of lower-middle socio-economic status held more positive stereotypes about ageing than the participants of high and middle status (p = 0.0496). Stereotypes about ageing held by health-related students and faculty members appear to be rather neutral. The stereotypes seem to be better among students with some clinical experience, students of lower socio-economic status and faculty members. © 2013 John Wiley & Sons A/S and The Gerodontology Society. Published by John Wiley & Sons Ltd.

  6. Crystal structure of 5,7,12,14-tetrahydro-5,14:7,12-bis([1,2]benzenopentacene-6,13-dione

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    Mohammad Nozari

    2016-12-01

    Full Text Available The lattice of 5,7,12,14-tetrahydro-5,14:7,12-bis([1,2]benzenopentacene-6,13-dione, C34H20O2, at 173 K has triclinic (P-1 symmetry and crystallizes with four independent half-molecules in the asymmetric unit. Each molecule is generated from a C17H10O substructure through an inversion center at the centroid of the central quinone ring, generating a wide H-shaped molecule, with a dihedral angle between the mean planes of the terminal benzene rings in each of the two symmetry-related pairs over the four molecules of 68.6 (1 (A, 65.5 (4 (B, 62.3 (9 (C, and 65.8 (8° (D, an average of 65.6 (1°. This compound has applications in gas-separation membranes constructed from polymers of intrinsic microporosity (PIM. The title compound is a product of a double Diels–Alder reaction between anthracene and p-benzoquinone followed by dehydrogenation. It has also been characterized by cyclic voltammetry and rotating disc electrode polarography, FT–IR, high resolution mass spectrometry, elemental analysis, and 1H NMR.

  7. The Halitosis Parameter Change After Using Siwak (Salvadora Persica At 11-13 Year Old Students in Tapak Sunan Boarding School

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    Arum Wijayanti

    2012-12-01

    Full Text Available Introduction: Siwak (Salvadora persica, an oral cleansing tool which came from ancient Arab has Islamic cultural values. Many researches concluded that siwak contains antibacterial agent which has function to kill bacteria causing oral malodor (halitosis. Objective: The purpose of this study was to analyze halitosis parameters change which consisted of Volatile Sulfur Compounds (VSC, Bleeding on Probing (BOP and tongue coating after using siwak at 11-13 year old students in Tapak Sunan Boarding School. Materials and methods: This study used experimental research method and 25 students in the age group of 11-13 year old became subjects of this study. Halitosis parameters measurements were taken before and after using 10 days siwak usage and through dental health education. OralChroma and organoleptic score were used to measure the VSC. Probing on six sites of gingival sulculs of each tooth was used to measured BOP. Classification of tounge coating was performed by observing the presence of white coating on the tongue surface. Statistical analysis was performed using Paired-t Test with p<0.05 as the level of significance. Results: Approximately 75% reduction of total VSC concentration was observed after siwak usage. Number of subjects with score 1 in organoleptic assessment for halitosis was also increased by 36%. Followed by reduction of BOP and tongue coating score by 57.7% and 26% respectively. Statistical analysis of those parameters showed significant differences before and after siwak usage. Conclusion: Siwak usage sucessfully decreased all halitosis parameters of the 11-13 years old students in Tapak Sunan Boarding School.DOI: 10.14693/jdi.v17i2.45

  8. Growth, maturation, functional capacities and sport-specific skills in 12-13 year-old- basketball players.

    Science.gov (United States)

    Coelho E Silva, M J; Moreira Carvalho, H; Gonçalves, C E; Figueiredo, A J; Elferink-Gemser, M T; Philippaerts, R M; Malina, R M

    2010-06-01

    The influence of maturity status on body size, functional capacities and basketball-specific skills was evaluated and multivariate relationships between domains of variables were examined in 80 male basketball players 12.0-13.9 years. Height, body mass and two skinfolds were measured. Stage of pubic hair (PH) was assessed clinically. Functional capacity was assessed with the vertical jump (squat jump, countermovement jump), 2-kg medicine ball throw, hand grip strength, 60-second sit-ups and endurance shuttle run. Performances on four basketball skills were tested: shooting, passing, dribbling and defensive movements. Analysis of covariance with age as the covariate was used to test differences among players by stage of puberty. Associations among body size, adiposity, functional capacities and skills were evaluated with canonical correlation analysis. Maturity status explained a significant portion of variance in body size (F=50.13, Pjumps and upper limb strength, but not for sit-ups or aerobic endurance. Canonical correlations showed an inverse relationship of height and adiposity with skill tests, and a positive relationship between skills and a combination of abdominal muscular strength (sit-ups) and aerobic endurance. Skill appeared to be independent of pubertal status and the tallest group of basketball players did not attain better scores in basketball-specific skill tests.

  9. Utilizing Lesson Study in Improving Year 12 Students' Learning and Performance in Mathematics

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    Jessie Siew Yin Chong

    2017-02-01

    Full Text Available This study investigated the use of Lesson Study to improve Year 12 students' performance in conditional probability through Inquiry-Based Learning (IBL lessons. In total, 66 students comprised of three Year 12 classes of similar abilities, and their three respective teachers from a government junior college participated in the study. The instruments used to collect the relevant data in this study were teachers' reflective journals and students' achievement tests. The collected data were then analyzed and interpreted quantitatively using the SPSS. The analysis of the students' pre- and post-tests concluded that as the lesson plans were gradually refined and enhanced, their performance in solving conditional probability questions steadily improved.

  10. Effects of Boreal Lake Wetlands on Atmospheric 13CH3D and 12CH2D2

    Science.gov (United States)

    Haghnegahdar, M. A.; Kohl, I. E.; Schauble, E. A.; Walter Anthony, K. M.; Young, E. D.

    2017-12-01

    Recently, we developed a theoretical model to investigate the potential use of 13CH3D and 12CH2D2 as tools for tracking atmospheric methane budget. We used electronic structure methods to estimate kinetic isotope fractionations associated with the major sink reactions of CH4 in air (reactions with •OH and Cl•), and literature data with reconnaissance measurements of the relative abundances of 13CH3D and 12CH2D2 to estimate the compositions of the largest atmospheric sources. Here we present new methane rare isotopologue data from boreal wetlands, comprising one of the most important sources, in order to evaluate the robustness of the model. Boreal wetlands (>55° N) account for more than half of the wetland area in the Northern hemisphere. We analyzed methane samples from high latitude lakes representing different geographical regions, geological and ecological contexts, methane fluxes, and isotopic signatures. Using clumped isotopes of CH4 we are able to determine the likely production mechanism for natural CH4 samples. So far, all of our analyzed samples except one plot in the microbial pure-culture methanogenesis field (Young et al. 2017) with ranges of -0.2‰ to +1.2‰ for Δ13CH3D, and -29.6‰ to -18.2‰ for Δ12CH2D2. These compositions are far from equilibrium. The one exception, from Lake Doughnut, Alaska, exhibits Δ13CH3D and Δ12CH2D2 values of +5.2‰ and +18.7‰, respectively, which fall near ambient thermodynamic equilibrium values. This may be an effect of methanotrophy. Mean Δ13CH3D and Δ12CH2D2 for all lake samples are +1.7‰ and -15.4‰ respectively, compared to our original estimate of +6.1‰ and +21.2‰ for the wetland methane source based on an assumption of equilibrium. If we assume that these samples are representative of the overall wetland source, Δ13CH3D decreases by 0.8‰ and Δ12CH2D2 decreases by 0.6‰ in our model of bulk atmospheric methane. Δ13CH3D and Δ12CH2D2 values of air (including •OH and Cl• sink

  11. The Effects of the Type of Skill Test, Choice, and Gender on the Situational Motivation of Physical Education Students

    Science.gov (United States)

    Johnson, Tyler G.; Prusak, Keven A.; Pennington, Todd; Wilkinson, Carol

    2011-01-01

    The purpose of this study was to examine the effects of (a) skill test type, (b) choices, and (c) gender on the situational motivation profiles of adolescents during skill testing in physical education. Participants were 507 students (53% male) aged 12-16 years (M = 13.87; SD = 0.94) attending a suburban junior high school in a western state in…

  12. Prevalence and factors of addictive Internet use among adolescents in Wuhan, China: interactions of parental relationship with age and hyperactivity-impulsivity.

    Science.gov (United States)

    Wu, Xianhua; Chen, Xinguang; Han, Juan; Meng, Heng; Luo, Jianghong; Nydegger, Liesl; Wu, Hanrong

    2013-01-01

    This study examined the prevalence of addictive Internet use and analyzed the role of parental relationship in affecting this behavior among a random sample of adolescents in Wuhan, China. Students (n = 1,101) were randomly selected from four schools, including 638 boys and 463 girls with a mean age of 13.8 (standard deviation = 1.2) years. Addictive Internet use, parental relationship, hyperactivity-impulsivity were measured by validated instruments. Prevalence rate, ANOVA and multiple linear regression method were used to analyze the level of Internet addiction and its association with parental relationship, hyperactivity-impulsivity, as well as the interaction of parental relationship with chronological age and hyperactivity-impulsivity. The prevalence rate of Internet addiction was 13.5% (16.5% for boys and 9.5% for girls, paddictive users, addictive Internet users were scored significantly lower on parental relationships and significantly higher on hyperactivity-impulsivity. Interaction analysis indicated that better parental relationship was associated with more reductions in risk of addictive Internet use for younger students than for older students, and with more risk of Internet addiction among higher than among lower hyperactivity-impulsivity students. Findings of this study indicate that adolescent addictive Internet use is a significant public health threat in China. Prevention interventions targeting parental relationship must consider adolescent's age and hyperactivity-impulsivity tendency.

  13. Prevalence and Factors of Addictive Internet Use among Adolescents in Wuhan, China: Interactions of Parental Relationship with Age and Hyperactivity-Impulsivity

    Science.gov (United States)

    Wu, Xianhua; Chen, Xinguang; Han, Juan; Meng, Heng; Luo, Jianghong; Nydegger, Liesl; Wu, Hanrong

    2013-01-01

    Purposes This study examined the prevalence of addictive Internet use and analyzed the role of parental relationship in affecting this behavior among a random sample of adolescents in Wuhan, China. Methods Students (n = 1,101) were randomly selected from four schools, including 638 boys and 463 girls with a mean age of 13.8 (standard deviation = 1.2) years. Addictive Internet use, parental relationship, hyperactivity-impulsivity were measured by validated instruments. Prevalence rate, ANOVA and multiple linear regression method were used to analyze the level of Internet addiction and its association with parental relationship, hyperactivity-impulsivity, as well as the interaction of parental relationship with chronological age and hyperactivity-impulsivity. Results The prevalence rate of Internet addiction was 13.5% (16.5% for boys and 9.5% for girls, paddictive users, addictive Internet users were scored significantly lower on parental relationships and significantly higher on hyperactivity-impulsivity. Interaction analysis indicated that better parental relationship was associated with more reductions in risk of addictive Internet use for younger students than for older students, and with more risk of Internet addiction among higher than among lower hyperactivity-impulsivity students. Conclusions Findings of this study indicate that adolescent addictive Internet use is a significant public health threat in China. Prevention interventions targeting parental relationship must consider adolescent’s age and hyperactivity-impulsivity tendency. PMID:23596525

  14. Evaluation of Some Physical Fitness Characteristics in 11-13 Years Old

    Science.gov (United States)

    Popovici, Ileana Monica; Popescu, Lucian; Radu, Liliana-Elisabeta

    2017-01-01

    Many studies indicate that a physical fitness characteristic is an important marker for healthy body and healthy mind. The major purpose of this study is to explore the levels of physical fitness of the students between 11 and 13 years of age. The participants of this study are 251 volunteer students including 95 boys and 156 girls between the…

  15. 7 CFR 210.12 - Student, parent and community involvement.

    Science.gov (United States)

    2010-01-01

    ... SERVICE, DEPARTMENT OF AGRICULTURE CHILD NUTRITION PROGRAMS NATIONAL SCHOOL LUNCH PROGRAM Requirements for School Food Authority Participation § 210.12 Student, parent and community involvement. (a) General... general community in activities to enhance the Program. (b) Food service management companies. School food...

  16. Medical and Psychology Students' Knowledge and Attitudes regarding Aging and Sexuality

    Science.gov (United States)

    Snyder, Rachel J.; Zweig, Richard A.

    2010-01-01

    The current study surveys medical and doctoral psychology students (N = 100) from an urban northeastern university regarding knowledge and attitudes toward elderly sexuality and aging using the Facts on Aging Quiz, the Aging Sexuality Knowledge and Attitudes Scale, and measures of interest in gerontology, academic/clinical exposure to aging and…

  17. Causes of vision impairment and assessment of need for low vision services for students of blind schools in Nepal.

    Science.gov (United States)

    Kansakar, I; Thapa, H B; Salma, K C; Ganguly, S; Kandel, R P; Rajasekaran, S

    The present study is first of its kind to evaluate causes of visual impairment of blind students in Nepal and assess their need for low vision rehabilitation services. To evaluate causes of vision impairment of students enrolled in blind schools in Nepal and assess the need for low vision rehabilitation services in these students. A survey was conducted in 12 blind schools in Nepal, which were registered with Nepal Association for Welfare of Blindness (NAWB).It was conducted by a team of an ophthalmologist and an optometrist, by using standard eye examination protocols of the World Health Organization Prevention of Blindness Program (WHO/PBL). Of the 345 students enrolled in 12 schools, 285 students were examined (response rate of 82.61%). The students were in the 5 - 29 years age group. Nearly three-fourth of the children had become blind within one year of age and 52.3% visually impaired at birth and 20.7% developed vision impairment within one year of age. After refraction, 26 students (9.12%) had mild visual impairment, 21 students (7.37%) had severe visual impairment and 238 students (83.51%) were blind. The main cause of vision impairment was found to be corneal 35.79% and retina diseases, mainly dystrophy, 20.35% followed by problems with the whole globe, lens and optic nerve, accounting for 13.33%, 12.63% and 12.98% respectively. The major etiological factors were those of childhood such as Vitamin A deficiency, measles and similar causes (42.11%) followed by hereditary causes (25.26%). Of the total students examined, 48.07% were visually impaired due to preventable causes and 16.14% treatable aggregating to 64.21% of avoidable blindness. Fifty seven (28.22%) students could read smaller than 2 M print size after low vision assessment for near and 33(15.78%) students benefited with telescopic trial for distance low vision. In Nepal, renewed focus on providing best possible quality of life for visually impaired children by proper low vision assessment and eye

  18. [1-13C]Glucose entry in neuronal and astrocytic intermediary metabolism of aged rats. A study of the effects of nicergoline treatment by 13C NMR spectroscopy.

    Science.gov (United States)

    Miccheli, Alfredo; Puccetti, Caterina; Capuani, Giorgio; Di Cocco, Maria Enrica; Giardino, Luciana; Calzà, Laura; Battaglia, Angelo; Battistin, Leontino; Conti, Filippo

    2003-03-14

    Age-related changes in glucose utilization through the TCA cycle were studied using [1-13C]glucose and 13C, 1H NMR spectroscopy on rat brain extracts. Significant increases in lactate levels, as well as in creatine/phosphocreatine ratios (Cr/PCr), and a decrease in N-acetyl-aspartate (NAA) and aspartate levels were observed in aged rat brains as compared to adult animals following glucose administration. The total amount of 13C from [1-13C]glucose incorporated in glutamate, glutamine, aspartate and GABA was significantly decreased in control aged rat brains as compared to adult brains. The results showed a decrease in oxidative glucose utilization of control aged rat brains. The long-term nicergoline treatment increased NAA and glutamate levels, and decreased the lactate levels as well as the Cr/PCr ratios in aged rat brains as compared to adult rats. The total amount of 13C incorporated in glutamate, glutamine, aspartate, NAA and GABA was increased by nicergoline treatment, showing an improvement in oxidative glucose metabolism in aged brains. A significant increase in pyruvate carboxylase/pyruvate dehydrogenase activity (PC/PDH) in the synthesis of glutamate in nicergoline-treated aged rats is consistent with an increase in the transport of glutamine from glia to neurons for conversion into glutamate. In adult rat brains, no effect of nicergoline on glutamate PC/PDH activity was observed, although an increase in PC/PDH activity in glutamine was, suggesting that nicergoline affects the glutamate/glutamine cycle between neurons and glia in different ways depending on the age of animals. These results provide new insights into the effects of nicergoline on the CNS.

  19. Age at Menarche and its Related Factors among School Girls, in Zanjan, Iran

    Directory of Open Access Journals (Sweden)

    Parisa Khoshnevisasl

    2017-04-01

    Full Text Available BackgroundThere are differences in the age at menarche in different countries and it seems that in recent decades gradually the age of puberty is declining. The aim of the present study was to determine the age at menarche and its related factors in school girls in Zanjan city, Iran.Materials and MethodsThis cross-sectional study was conducted on 1,500 healthy school girls between 6-17 years old who were selected on the basis of a multistage probability sampling. Age at menarche, birth weight, family size, Body Mass Index (BMI, fast food consumption, and physical activity, were recorded. Data were analyzed using SPSS version 16.0.ResultsOut of 1,500 students, 273 girls (18.2% had experienced menarche with a mean age of 12.6±1.6 (95% confidence interval [C]: 12.4-12.8, and a median age of 13 years. The prevalence of early menarche, was 10.3%, (95% CI: 6.6%-14.1%. A significant association between menarche and BMI, frequency of fast food consumption and birth rank was observed; however, we didn’t find a significant association between physical activity (P>0.05 and birth weight (P>0.05 with menarche. ConclusionThe mean age of menarche in our study was 12.6±1.6 years old, similar to other studies in Iran, and it was significantly associated with higher BMI.

  20. Evaluation oral hygiene index in the 12-years-old students

    Directory of Open Access Journals (Sweden)

    Masoomeh Shirzai

    2011-10-01

    Full Text Available Background: Periodontal disease and dental caries are one of the most important factors of tooth loss and the most common oral health problem, therefore the present study was performed to assess oral hygiene index in the 12-years-old students in Zahedan city.Material and Method: In this descriptive-analytical study, Zahedan city (2009 was divided based on socio-economical situation in to two areas and 10 school (boys & girls school from each area, and 47 students from each school, were selected randomly. Oral hygiene status of 942 12-years-old male and female students was assessed with OHI-S index. Data were analyzed by SPSS software version-15 (t-test and chi-square. Results: The mean OHI-S was 1.43±0.72 and 44.7% persons had well OHI-S, 50.3% had medium OHI-S and 5% had poor OHI-S. The mean OHI-S was 1.42 in boys and 1.44 in girls. Correlation between OHI-S with father occupation (p=0.03 and sequences of tooth brushing (p=0.001 was significant. Conclusion: Oral hygiene status of studied students was in the middle and people who brushes their teeth more time, had higher OHI-S indices

  1. Cannabis use among middle and high school students in Ontario: a school-based cross-sectional study

    Science.gov (United States)

    Sampasa-Kanyinga, Hugues; Hamilton, Hayley A.; LeBlanc, Allana G.; Chaput, Jean-Philippe

    2018-01-01

    Background: Cannabis use can have serious detrimental effects in children and adolescents. It is therefore important to continually assess the use of cannabis among young people in order to inform prevention efforts. We assessed the prevalence of cannabis use among middle and high school students in Ontario and examined its association with demographic and behavioural factors. Methods: Data were obtained from the 2015 Ontario Student Drug Use and Health Survey, a province-wide school-based survey of students in grades 7 through 12. Analyses included a representative sample of 9920 middle and high school students. Bivariate cross-tabulations and logistic regression analyses were used to investigate the factors associated with cannabis use. Results: Overall, 21.5% and 13.9% of students reported using cannabis in the previous year and previous month, respectively. The conditional probability that an adolescent who reported cannabis use in the previous year would report daily use was 12.5%. There was a significant dose-response gradient with age, with older students being more likely to use cannabis than younger students. In multivariable analyses, being in grades 10 through 12 (odds ratios [ORs] ranged from 3.71 to 3.85), being black (OR 2.67 [95% confidence interval (CI) 1.76-4.05]), using tobacco cigarettes (OR 10.10 [95% CI 8.68-13.92]) and being an occasional (OR 5.35 [95% CI 4.01-7.13]) or regular (OR 14.6 [95% CI 10.8-19.89]) alcohol user were associated with greater odds of cannabis use. Being an immigrant was associated with lower odds of cannabis use (OR 0.55 [95% CI 0.39-0.78]). Interpretation: The findings suggest that cannabis use is prevalent among middle and high school students in Ontario and is strongly associated with tobacco cigarette smoking and alcohol consumption. Future research should document trends in cannabis use over time, including its risks, especially when the legalization of recreational cannabis comes into effect. PMID:29367264

  2. 12 CFR 906.13 - How does the Finance Board oversee and monitor the outreach program?

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false How does the Finance Board oversee and monitor the outreach program? 906.13 Section 906.13 Banks and Banking FEDERAL HOUSING FINANCE BOARD FEDERAL HOUSING FINANCE BOARD ORGANIZATION AND OPERATIONS OPERATIONS Contractor Outreach Program for Businesses Owned by Minorities, Women, or Individuals...

  3. Do self-reported data reflect the real burden of lifetime exposure to sexual violence among females aged 13-24 years in Malawi?

    Science.gov (United States)

    Fan, Amy Z; Kress, Howard; Gupta, Sundeep; Wadonda-Kabondo, Nellie; Shawa, Mary; Mercy, James

    2016-08-01

    Under most circumstances, the lifetime experience of sexual violence (SV) among girls and young women would likely increase with age. However, the empirical data from a retrospective study may not necessarily conform to this belief. Data from a nationally representative sample of females aged 13-24 years in Malawi in 2013 (n=1029) were analyzed. SV was defined as unwanted touching or attempted, pressured, or physically forced sex. The distribution of four types of SV among victims was compared between younger (13-18 years) and older (19-24 years) age groups. The strength of association between SV exposure and health outcomes was examined by age group. The risk of experiencing SV during their lifetime was three times greater for younger than that for older age females (Hazard ratio=3.32). Among females who had experienced SV, older age females were more likely to report forced or pressured sex (41.2%) as their initial SV experience than younger age females (17.8%). The strength of association between the SV exposure and health outcomes did not differ by age group. The self-report lifetime and childhood victimization to sexual violence may not necessarily higher among older than that among younger females. The current risk of exposure to sexual violence seems to influence the recall of lifetime and childhood victimization to a great extent. In order to make the field aware of this phenomenon, prevalence estimates from all three time frames (lifetime, childhood, and during the past 12 months) should be reported separately by age group. Copyright © 2016. Published by Elsevier Ltd.

  4. Measurement of the natural variation of 13C/12C isotope ratio in organic samples

    International Nuclear Information System (INIS)

    Ducatti, C.

    1977-01-01

    The isotopic ratio analysis for 13 C/ 12 C by mass spectrometry using a 'Working standard' allows the study of 13 C natural variation in organic material, with a total analytical error of less than 0,2%. Equations were derived in order to determine 13 C/ 12 C and 18 O/ 16 O ratios related to the 'working standard' CENA-std and to the international standard PDB. Isotope ratio values obtained with samples prepared in two different combustion apparatus were compared; also the values obtained preparing samples by acid decomposition of carbonaceous materials were compared with the values obtained in different international laboratories. Utilizing the methodology proposed, several leaves collected at different heights of different vegetal species, found 'inside' and 'outside' of the Ducke Forest Reserve, located in the Amazon region, are analysed. It is found that the 13 C natural variation depends upon metabolic process and environmental factors, both being factors which may be qualified as parcial influences on the CO 2 cycle in the forest. (author) [pt

  5. The MEDIATOR genes MED12 and MED13 control Arabidopsis root system configuration influencing sugar and auxin responses.

    Science.gov (United States)

    Raya-González, Javier; López-Bucio, Jesús Salvador; Prado-Rodríguez, José Carlos; Ruiz-Herrera, León Francisco; Guevara-García, Ángel Arturo; López-Bucio, José

    2017-09-01

    Arabidopsis med12 and med13 mutants exhibit shoot and root phenotypes related to an altered auxin homeostasis. Sucrose supplementation reactivates both cell division and elongation in primary roots as well as auxin-responsive and stem cell niche gene expression in these mutants. An analysis of primary root growth of WT, med12, aux1-7 and med12 aux1 single and double mutants in response to sucrose and/or N-1-naphthylphthalamic acid (NPA) placed MED12 upstream of auxin transport for the sugar modulation of root growth. The MEDIATOR (MED) complex plays diverse functions in plant development, hormone signaling and biotic and abiotic stress tolerance through coordination of transcription. Here, we performed genetic, developmental, molecular and pharmacological analyses to characterize the role of MED12 and MED13 on the configuration of root architecture and its relationship with auxin and sugar responses. Arabidopsis med12 and med13 single mutants exhibit shoot and root phenotypes consistent with altered auxin homeostasis including altered primary root growth, lateral root development, and root hair elongation. MED12 and MED13 were required for activation of cell division and elongation in primary roots, as well as auxin-responsive and stem cell niche gene expression. Remarkably, most of these mutant phenotypes were rescued by supplying sucrose to the growth medium. The growth response of primary roots of WT, med12, aux1-7 and med12 aux1 single and double mutants to sucrose and application of auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) revealed the correlation of med12 phenotype with the activity of the auxin intake permease and suggests that MED12 acts upstream of AUX1 in the root growth response to sugar. These data provide compelling evidence that MEDIATOR links sugar sensing to auxin transport and distribution during root morphogenesis.

  6. A Comparative Study of Undergraduates' Attitudes Toward Aging in Taiwan and the United States Through Student Drawings.

    Science.gov (United States)

    Liou, Chih-Ling

    2017-09-01

    The purpose of this study is to compare similarities and differences in the attitudes toward aging among college students from Taiwan and the United States; 128 Taiwanese students and 124 U.S. students participated in this study. The findings indicate that the majority of students from both countries viewed aging as consisting primarily of physical changes. The differences are the U.S. students' drawings showing physical decline along with hospitals, nursing homes, or death, whereas Taiwanese students presenting physical decline as getting wrinkles, wearing glasses, or needing aid devices. U.S. students associated aging with grandparents-grandchildren relationships, whereas more Taiwanese students thought aging related to spousal relationships. This study adds to the existing literature that demonstrates the strong influence of different cultures on students' attitudes toward aging. Further, knowledge derived from this study can be used in gerontology courses for both students and professors to lessen or correct ageist stereotypes over time.

  7. Reassessment of the C-13/C-12 and C-14/C-12 isotopic fractionation ratio and its impact on high-precision radiocarbon dating

    NARCIS (Netherlands)

    Fahrni, Simon M.; Southon, John R.; Santos, Guaciara M.; Palstra, Sanne W. L.; Meijer, Harro A. J.; Xu, Xiaomei

    2017-01-01

    The vast majority of radiocarbon measurement results (C-14/C-12 isotopic ratios or sample activities) are corrected for isotopic fractionation processes (measured as C-13/C-12 isotopic ratios) that occur in nature, in sample preparation and measurement. In 1954 Harmon Craig suggested a value of 2.0

  8. Differences in Chemical Engineering Student-Faculty Interactions by Student Age and Experience at a Large, Public, Research University

    Science.gov (United States)

    Ciston, Shannon; Sehgal, Sanya; Mikel, Tressa; Carnasciali, Maria-Isabel

    2018-01-01

    Adult undergraduate students aged 25+ in engineering disciplines are an important demographic bringing a wealth of life experience to the classroom. This study uses qualitative data drawn from semi-structured interviews with two groups of undergraduate chemical engineering students at a large, public research university: adult students with…

  9. Static Recrystallization Behavior of Z12CN13 Martensite Stainless Steel

    Science.gov (United States)

    Luo, Min; Zhou, Bing; Li, Rong-bin; Xu, Chun; Guo, Yan-hui

    2017-09-01

    In order to increase the hot workability and provide proper hot forming parameters of forging Z12CN13 martensite stainless steel for the simulation and production, the static recrystallization behavior has been studied by double-pass hot compression tests. The effects of deformation temperature, strain rate and inter-pass time on the static recrystallization fraction by the 2% offset method are extensively studied. The results indicate that increasing the inter-pass time and the deformation temperature as well as strain rate appropriately can increase the fraction of static recrystallization. At the temperature of 1050-1150 °C, inter-pass time of 30-100 s and strain rate of 0.1-5 s-1, the static recrystallization behavior is obvious. In addition, the kinetics of static recrystallization behavior of Z12CN13 steel has been established and the activation energy of static recrystallization is 173.030 kJ/mol. The substructure and precipitates have been studied by TEM. The results reveal that the nucleation mode is bulging at grain boundary. Undissolved precipitates such as MoNi3 and Fe3C have a retarding effect on the recrystallization kinetics. The effect is weaker than the accelerating effect of deformation temperature.

  10. In vivo imaging of matrix metalloprotease 12 and matrix metalloprotease 13 activities in the mouse model of collagen-induced arthritis

    DEFF Research Database (Denmark)

    Lim, Ngee Han; Meinjohanns, Ernst; Bou-Gharios, George

    2014-01-01

    inhibitor GM6001 and specific synthetic inhibitors of MMP-12 and MMP-13. The probes were used to follow these enzyme activities in the collagen-induced arthritis (CIA) model in vivo. Results. The MMP-12- and MMP-13-activity probes (MMP12ap and MMP13ap, respectively) discriminated between the two enzymatic...... activities. The in vivo activation of these probes was inhibited by GM6001 and by their respective specific inhibitors. In the CIA model, MMP12ap activation peaked 5 days after disease onset and showed strong correlation with disease severity during this time (r = 0.85; p...

  11. Developmental continuity of oppositional defiant disorder subdimensions at ages 8, 10, and 13 years and their distinct psychiatric outcomes at age 16 years.

    Science.gov (United States)

    Whelan, Yvonne M; Stringaris, Argyris; Maughan, Barbara; Barker, Edward D

    2013-09-01

    To test the developmental continuity, interrelationships, and predictive associations of the oppositional defiant disorder (ODD) subdimensions of irritable, headstrong, and hurtful. Data were collected from 6,328 mother-child pairs participating in the Avon Longitudinal Study of Parents and Children (United Kingdom). Developmental continuity for each subdimension was strong and interrelationships indicated that headstrong was associated mainly with irritable, whereas irritable did not cross associate with other ODD subdimensions; and hurtful was associated with lower levels of headstrong. With regard to associations at age 16 years, irritable at age 13 years was associated with depression, whereas headstrong at 13 was associated with delinquency and callous attitude; at age 13, hurtful failed to associate with any of the 3 age 16 outcomes. The results suggest that the ODD headstrong and irritable subdimensions are developmentally distinct, with small cross-over (i.e., headstrong to irritable), and are associated with unique outcomes. Hurtful does not appear to be associated with future maladjustment in children. Copyright © 2013 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.

  12. Burnout syndrome among dental students: a short version of the "Burnout Clinical Subtype Questionnaire" adapted for students (BCSQ-12-SS).

    Science.gov (United States)

    Montero-Marin, Jesus; Monticelli, Francesca; Casas, Marina; Roman, Amparo; Tomas, Inmaculada; Gili, Margarita; Garcia-Campayo, Javier

    2011-12-12

    Burnout has been traditionally defined in relation to the dimensions of "exhaustion", "cynicism", and "inefficiency". More recently, the Burnout Clinical Subtype Questionnaire (BCSQ-12) further established three different subtypes of burnout: the "frenetic" subtype (related to "overload"), the "under-challenged" subtype (related to "lack of development"), and the "worn-out" subtype (related to "neglect"). However, to date, these definitions have not been applied to students. The aims of this research were (1) to adapt a Spanish version of the BCSQ-12 for use with students, (2) to test its factorial validity, internal consistency, convergent and discriminant validity, and (3) to assess potential socio-demographic and occupational risk factors associated with the development of the subtypes. We used a cross-sectional design on a sample of dental students (n = 314) from Santiago and Huesca universities (Spain). Participants completed the Burnout Clinical Subtype Questionnaire Student Survey (BCSQ-12-SS), the Maslach Burnout Inventory Student Survey (MBI-SS), and a series of socio-demographic and occupational questions formulated for the specific purpose of this study. Data were subjected to exploratory factor analysis (EFA) using the principal component method with varimax orthogonal rotation. To assess the relations with the criterion, we calculated the Pearson correlation coefficient (r), multiple correlation coefficient (R(y.123)), and the coefficient of determination (R(2)(y.123)). To assess the association between the subtypes and the socio-demographic variables, we examined the adjusted odds ratio (OR) obtained from multivariate logistic regression models. Factorial analyses supported the theoretical proposition of the BCSQ-12-SS, with α-values exceeding 0.80 for all dimensions. The "overload-exhaustion" relation was r = 0.59 (p burnout as established by the BCSQ-12-SS. As such, the BCSQ-12-SS can be used for the recognition of clinical profiles and for the

  13. Addressing the Nets for Students through Constructivist Technology Use in K-12 Classrooms

    Science.gov (United States)

    Niederhauser, Dale S.; Lindstrom, Denise L.

    2006-01-01

    The National Educational Technology Standards for Students promote constructivist technology use for K-12 students in U.S. schools. In this study, researchers reported on 716 cases in which teachers described technology-based activities they conducted with their students. Narrative analysis was used to examine case transcripts relative to the…

  14. Evaluating the Superpave Option in Unified Facilities Guide Specification 32-12-15.13, Hot Mix Asphalt Airfield Paving

    Science.gov (United States)

    2014-06-01

    M249 5.47 2.291 2.381 3.8 12.8 70.6 5,132 18 M250 5.47 2.283 2.381 4.1 13.2 68.7 5,678 19 M251 5.47 2.287 2.381 4.0 13.0 69.4 5,534 16 M252 5.47...71 143.0 M250 5.47 1179.60 664.10 1180.7 0 516.60 2.28 2.38 4.12 13.15 68.70 142.48 M251 5.47 1158.4 652.3 1158.9 506.6 2.287 2.381 4.0 13.0 69

  15. Frequency of temporomandibular joint dysfunction with clicking symptom due to primary molar premature loss in children aged 6-12 years old

    Directory of Open Access Journals (Sweden)

    Riana Hestu Laksitowati

    2009-03-01

    Full Text Available Temporomandibular joint dysfunction with clicking symptom is sound “click” when open and close the mouth. The purpose of this study was to obtain the description of the frequency of temporomandibular joint dysfunction with clicking symptom caused by premature loss of primary molar teeth in children aged 6-12 years old at SDIT Imam Bukhari. The study was a descriptive survey, 136 students as samples were taken by purposive sampling technique. Premature loss of primary molar teeth examined by checking up the first and second primary molars upper and lower jaw using the hand mirror and explorer. Temporomandibular joint dysfunction examined by palpation and using a stethoscope. The result of this study showed that from 136 students having premature loss there are 49 students (36,03% had temporomandibular joint dysfunction with clicking symptom. The conclusion of this study indicates that more than one-fourth students at SDIT Imam Bukhari with premature loss of primary molar teeth had temporomandibular joint dysfunction with clicking symptom.

  16. Homocysteine and vitamin B 12 status and iron deficiency anemia in female university students from Gaza Strip, Palestine

    Directory of Open Access Journals (Sweden)

    Mahmoud Mohammed Sirdah

    2014-06-01

    Full Text Available OBJECTIVE: Nutritional deficiencies are very significant to the overall health of humans at all ages and for both genders, yet in infants, children and women of childbearing age these deficiencies can seriously affect growth and development. The present work is aimed to assess homocysteine and vitamin B12 status in females with iron deficiency anemia from the Gaza Strip.METHODS: Venous blood samples were randomly collected from 240 female university students (18-22 years old and parameters of the complete blood count, serum ferritin, homocysteine and vitamin B12 were measured. Statistical analysis included the t-test and analysis of variance (ANOVA using the IBM SPSS software (version 18. Statistical significance was set for p-values <0.05.RESULTS: The results revealed that 20.4% of the students have iron deficiency anemia. The mean serum vitamin B12 level in females with iron deficiency anemia (212.9 ± 62.8 pg/mL was significantly lower than in normal controls (286.9 ± 57.1 pg/mL and subjects with microcytic anemia and normal ferritin (256.7 ± 71.1 pg/mL. Significantly higher serum homocysteine levels were reported in the iron deficiency anemia group (27.0 ± 4.6 µmol/L compared to normal controls (15.5 ± 2.9 µmol/L and in subjects with microcytic anemia and normal ferritin (18.1 ± 2.7 µmol/L. Statistically significant negative correlations were reported for serum homocysteine with serum ferritin, vitamin B12, hemoglobin, and hematocrit levels.CONCLUSION: Important associations were found between serum homocysteine and markers of iron deficiency. Monitoring homocysteine levels might be essential to understand the development of different clinical conditions including anemia. It seems necessary to conduct prospective trials to determine whether treating anemia ameliorates homocysteine levels.

  17. Smoothed Body Composition Percentiles Curves for Mexican Children Aged 6 to 12 Years

    Directory of Open Access Journals (Sweden)

    Melchor Alpizar

    2017-12-01

    Full Text Available Overweight children and childhood obesity are a public health problem in Mexico. Obesity is traditionally assessed using body mass index (BMI, but an excess of adiposity does not necessarily reflect a high BMI. Thus, body composition indexes are a better alternative. Our objective was to generate body composition percentile curves in children from Mexico City. A total of 2026 boys and 1488 girls aged 6 to 12 years old were studied in Mexico City. Body weight, height, and BMI calculation were measured. Total body fat percentage (TBFP was derived from the skinfold thicknesses, and fat mass (FMI and free fat mass indexes (FFMI were calculated. Finally, age- and gender-specifıc smoothed percentile curves were generated with Cole’s Lambda, Mu, and Sigma (LMS method. In general, height, weight, waist circumference (WC, and TBFP were higher in boys, but FFM was higher in girls. TBFP appeared to increase significantly between ages 8 and 9 in boys (+2.9% and between ages 10 and 11 in girls (+1.2%. In contrast, FFM% decreased noticeably between ages 8 and 9 until 12 years old in boys and girls. FMI values peaked in boys at age 12 (P97 = 14.1 kg/m2 and in girls at age 11 (P97 = 8.8 kg/m2. FFMI percentiles increase at a steady state reaching a peak at age 12 in boys and girls. Smoothed body composition percentiles showed a different pattern in boys and girls. The use of TBFP, FMI, and FFMI along with BMI provides valuable information in epidemiological, nutritional, and clinical research.

  18. Influence of having breakfast on cognitive performance and mood in 13- to 20-year-old high school students: results of a crossover trial.

    Science.gov (United States)

    Widenhorn-Müller, Katharina; Hille, Katrin; Klenk, Jochen; Weiland, Ulrike

    2008-08-01

    The goal was to determine whether breakfast had effects on the cognitive performance and mood of high school students. A crossover trial was performed in boarding schools, involving 104 students between 13 and 20 years of age. The participants were randomly assigned to 2 equal-size groups on the morning of the first testing day. One half of the total sample received a standardized breakfast, whereas the other half received no breakfast. Seven days later, the treatment order was reversed. Measurements of cognitive function included standardized tests of attention and concentration, as well as tests of verbal and spatial memory. In addition, mood was rated with a self-administered questionnaire covering the dimensions of positive and negative affect, information uptake, arousal, and alertness. Statistical analysis consisted of repeated-measures analysis of variance. Breakfast had no effect on sustained attention among high school students. Visuospatial memory was improved in male students. Self-reported alertness improved significantly in the entire study population. Male students reported feeling more positive after consuming breakfast, compared with the fasting condition. This crossover trial demonstrated positive short-term effects of breakfast on cognitive functioning and self-reported alertness in high school students.

  19. Students' Changing Attitudes and Aspirations Towards Physics During Secondary School

    Science.gov (United States)

    Sheldrake, Richard; Mujtaba, Tamjid; Reiss, Michael J.

    2017-11-01

    Many countries desire more students to study science subjects, although relatively few students decide to study non-compulsory physics at upper-secondary school and at university. To gain insight into students' intentions to study non-compulsory physics, a longitudinal sample (covering 2258 students across 88 secondary schools in England) was surveyed in year 8 (age 12/13) and again in year 10 (age 14/15). Predictive modelling highlighted that perceived advice, perceived utility of physics, interest in physics, self-concept beliefs (students' subjective beliefs of their current abilities and performance) and home support specifically orientated to physics were key predictors of students' intentions. Latent-transition analysis via Markov models revealed clusters of students, given these factors at years 8 and 10. Students' intentions varied across the clusters, and at year 10 even varied when accounting for the students' underlying attitudes and beliefs, highlighting that considering clusters offered additional explanatory power and insight. Regardless of whether three-cluster, four-cluster, or five-cluster models were considered, the majority of students remained in the same cluster over time; for those who transitioned clusters, more students changed clusters reflecting an increase in attitudes than changed clusters reflecting a decrease. Students in the cluster with the most positive attitudes were most likely to remain within that cluster, while students in clusters with less positive attitudes were more likely to change clusters. Overall, the cluster profiles highlighted that students' attitudes and beliefs may be more closely related than previously assumed, but that changes in their attitudes and beliefs were indeed possible.

  20. Electrochemical reaction mechanisms under various charge-discharge operating conditions for Li1.2Ni0.13Mn0.54Co0.13O2 in a lithium-ion battery

    Science.gov (United States)

    Konishi, Hiroaki; Hirano, Tatsumi; Takamatsu, Daiko; Gunji, Akira; Feng, Xiaoliang; Furutsuki, Sho; Okumura, Takefumi; Terada, Shohei; Tamura, Kazuhisa

    2018-06-01

    The potential in each state of charge (SOC) during charging of Li1.2Ni0.13Mn0.54Co0.13O2 is higher than that during discharging. In other words, the potential hysteresis occurs between charging and discharging. Furthermore, the potential in each SOC changes according to the charge-discharge operating conditions, indicating that the charge-discharge reaction mechanism is also affected. To clarify the effect of charge-discharge operating conditions on the electrochemical reaction, Li1.2Ni0.13Mn0.54Co0.13O2 was charged and discharged under various charge-discharge operating ranges, and open-circuit potential (OCP), crystal structure, and oxidation states of the transition metals were evaluated by electrochemical measurement, X-ray diffraction (XRD), and X-ray absorption fine structure (XAFS). These results indicate that OCP, lattice parameters, and oxidation states of the transition metals of Li1.2Ni0.13Mn0.54Co0.13O2 in each SOC are not constant. The XRD results indicate that two phases, namely, LiNi0.33Mn0.33Co0.33O2-like and Li2MnO3-like, exist in Li1.2Ni0.13Mn0.54Co0.13O2. For the LiNi0.33Mn0.33Co0.33O2-like phase, the relationship between OCP, lattice parameters, and oxidation states of the transition metals in each SOC is not affected by the charge-discharge operating conditions, indicating that extraction and insertion of lithium ions for the LiNi0.33Mn0.33Co0.33O2-like phase progresses at almost the same potential. Although the extraction and insertion of lithium ions for the Li2MnO3-like phase progresses at almost the same potential in the low-SOC region, the OCP and lattice parameter in each SOC in the high-SOC region are not constant. Therefore, the extraction of lithium ions from the Li2MnO3-like phase in the high-SOC region causes the potential hysteresis of Li1.2Ni0.13Mn0.54Co0.13O2.

  1. Co-existence of t(6;13)(p21;q14.1) and trisomy 12 in chronic lymphocytic leukemia.

    Science.gov (United States)

    de Oliveira, Fábio Morato; de Figueiredo Pontes, Lorena Lobo; Bassi, Sarah Cristina; Dalmazzo, Leandro Felipe Figueiredo; Falcão, Roberto Passetto

    2012-06-01

    We report a case of a 57-year-old man diagnosed with chronic lymphocytic leukemia (CLL) and presence of a rare t(6;13)(p21;q14.1) in association with an extra copy of chromosome 12. Classical cytogenetic analysis using the immunostimulatory combination of DSP30 and IL-2 showed the karyotype 47,XY,t(6;13)(p21;q14.1), +12 in 75% of the metaphase cells. Spectral karyotype analysis (SKY) confirmed the abnormality previously seen by G-banding. Additionally, interphase fluorescence in situ hybridization using an LSI CEP 12 probe performed on peripheral blood cells without any stimulant agent showed trisomy of chromosome 12 in 67% of analyzed cells (134/200). To the best of our knowledge, the association of t(6;13)(p21;q14.1) and +12 in CLL has never been described. The prognostic significance of these new findings in CLL remains to be elucidated. However, the patient has been followed up since 2009 without any therapeutic intervention and has so far remained stable.

  2. A histone map of human chromosome 20q13.12.

    Directory of Open Access Journals (Sweden)

    Pelin Akan

    Full Text Available We present a systematic search for regulatory elements in a 3.5 Mb region on human chromosome 20q13.12, a region associated with a number of medical conditions such as type II diabetes and obesity.We profiled six histone modifications alongside RNA polymerase II (PolII and CTCF in two cell lines, HeLa S3 and NTERA-2 clone D1 (NT2/D1, by chromatin immunoprecipitation using an in-house spotted DNA array, constructed with 1.8 kb overlapping plasmid clones. In both cells, more than 90% of transcription start sites (TSSs of expressed genes showed enrichments with PolII, di-methylated lysine 4 of histone H3 (H3K4me2, tri-methylated lysine 4 of histone H3 (H3K4me3 or acetylated H3 (H3Ac, whereas mono-methylated lysine 4 of histone H3 (H3K4me1 signals did not correlate with expression. No TSSs were enriched with tri-methylated lysine 27 of histone H3 (H3K27me3 in HeLa S3, while eight TSSs (4 expressed showed enrichments in NT2/D1. We have also located several CTCF binding sites that are potential insulator elements.In summary, we annotated a number of putative regulatory elements in 20q13.12 and went on to verify experimentally a subset of them using dual luciferase reporter assays. Correlating this data to sequence variation can aid identification of disease causing variants.

  3. Long-Term Follow-up of Acoustic Schwannoma Radiosurgery With Marginal Tumor Doses of 12 to 13 Gy

    International Nuclear Information System (INIS)

    Chopra, Rahul; Kondziolka, Douglas; Niranjan, Ajay; Lunsford, L. Dade; Flickinger, John C.

    2007-01-01

    Purpose: To define long-term tumor control and clinical outcomes of radiosurgery with marginal tumor doses of 12 to 13 Gy for unilateral acoustic schwannoma. Methods and Materials: A total of 216 patients with previously untreated unilateral acoustic schwannoma underwent Gamma Knife radiosurgery between 1992 and 2000 with marginal tumor doses of 12 to 13 Gy (median, 13 Gy). Median follow-up was 5.7 years (maximum, 12 years; 41 patients with >8 years). Treatment volumes were 0.08-37.5 cm 3 (median, 1.3 cm 3 ). Results: The 10-year actuarial resection-free control rate was 98.3% ± 1.0%. Three patients required tumor resection: 2 for tumor growth and 1 partial resection for an enlarging adjacent subarachnoid cyst. Among 121 hearing patients with >3 years of follow-up, crude hearing preservation rates were 71% for keeping the same Gardner-Robertson hearing level, 74% for serviceable hearing, and 95% for any testable hearing. For 25 of these patients with intracanalicular tumors, the respective rates for preserving the same Gardner-Robertson level, serviceable hearing, and testable hearing were 80%, 88%, and 96%. Ten-year actuarial rates for preserving the same Gardner-Robertson hearing levels, serviceable hearing, any testable hearing, and unchanged facial and trigeminal nerve function were 44.0% ± 11.7%, 44.5% ± 10.5%, 85.3% ± 6.2%, 100%, and 94.9% ± 1.8%, respectively. Conclusions: Acoustic schwannoma radiosurgery with 12 to 13 Gy provides high rates of long-term tumor control and cranial nerve preservation after long-term follow-up

  4. Academic Achievement, Employment, Age and Gender and Students' Experience of Alternative School

    Science.gov (United States)

    Poyrazli, Senel; Ferrer-Wreder, Laura; Meister, Denise G.; Forthun, Larry; Coatsworth, J. Doug; Grahame, Kamini Maraj

    2008-01-01

    The purpose of this cross-sectional study was to explore associations between academic achievement, employment, gender, and age in relation to students' sense of school membership and perception of adults in school. The sample consisted of 102 secondary, alternative school students. Results indicated that students with a more positive perception…

  5. Influence of age, sexual maturation, anthropometric variables and body composition on flexibility DOI:10.5007/1980-0037.2010v12n3p151

    Directory of Open Access Journals (Sweden)

    Giseli Minatto

    2010-01-01

    Full Text Available Since flexibility is an important component of health-related physical fitness at all ages, this parameter should be evaluated in children and adolescents because the ability to acquire and maintain levels of flexibility is greater in this age group. Thus, the objective of this study was to evaluate body weight, height, BMI and flexibility according to chronological age and sexual maturation and to determine the influence of these variables on flexibility in students from public and private schools. A cross-sectional descriptive and analytical study was conducted. The sample consisted of 2604 girls aged 8 to 17 years. Body weight, height, BMI, sexual maturation, and flexibility were evaluated. The data were analyzed descriptively using the following inferential tests: two-way analysis of variance (ANOVA followed by the Tukey post-hoc test, Pearson’s and Spearman’s simple correlation coefficients, and stepwise multiple regression analysis. The SPSS® 13.0 program was used for all statistical analyses, with a level of significance of p< 0.05. Significant differences with increasing age and maturation stage were observed for the variables body weight, height and BMI when compared to the subsequent year. In conclusion, body wei-ght and height increased with increasing age, especially between 8 and 13 years, and flexibility remained stable throughout childhood and adolescence.

  6. Argumentation Quality of Socio-scientific Issue between High School Students and Postgraduate Students about Cancer

    Science.gov (United States)

    Anisa, A.; Widodo, A.; Riandi, R.

    2017-09-01

    Argumentation is one factor that can help improve critical thinking skills. Arguing means to defend statements with the various data, denials, evidence, and reinforcement that support the statement. The research aimed to capture the quality of argument skills by students in grade 12 high school students and in postgraduate student on social-scientific issues of cancer. Both group subjects are not in the same school or institution, chosen purposively with the subject of 39 high school students of grade 12 in one district of West Java and 13 students of Biology education postgraduate in one of University in West Java - Indonesia. The results of the quality structure of arguments in both subject groups show the same pattern, which is claim - warrant - and ground, with the quality of counterclaim aspects on the postgraduate students look better than grade 12 students. This provides an illustration that the ability in argumentation between students and teachers in the socio-scientific issue of cancer should be evaluate so that the learning process would be more refined in schools.

  7. B12 deficiency increases with age in hospitalized patients: a study on 14,904 samples.

    Science.gov (United States)

    Mézière, Anthony; Audureau, Etienne; Vairelles, Stéphane; Krypciak, Sébastien; Dicko, Michèle; Monié, Marguerite; Giraudier, Stéphane

    2014-12-01

    Cobalamin deficiency is responsible for hematological, neurological, neurocognitive, and neuropsychiatric impairments and is a risk factor for cardiovascular diseases, particularly in the elderly people. In order to determine B12 status in old inpatients, a total number of 14,904 hospitalized patients in whom B12 measurements were performed in five hospitals in the Paris metropolitan area were included from January 1, 2011 to December 31, 2011. The aims of the study were to determine whether age had an impact on B12 and folate deficiencies and to evaluate correlations between B12 and biological parameters-folate, hemoglobin, mean cell volume, homocystein (tHcy)-and age. Patients were aged 70.3±19.5 years. Low B12 concentration ( 17 µmol/L), 20.4% had low folate concentration (folate 17 µmol/L), and 4.7% of patients were both functional B12 and folate deficient. The B12 or folate deficient patients had lower mean cell volume level than nondeficient patients. Increase in mean cell volume and tHcy concentrations with age and decrease in B12, folate, and hemoglobin levels with age were observed. Frequency of functional B12 deficiency was 9.6% in patients aged 30-60 years and 14.2% in patients over 90 years. Frequency of functional folate deficiency was 9.5% in 30-60 years and 12.1% in >90 years. In inpatients, functional B12 deficiency and functional folate deficiency increase with age and are not associated with anemia or macrocytosis. False vitamin B deficiencies are frequent. © The Author 2014. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  8. Is Article 13 of “ Educational Directive for Gifted and Talented Students in Universities” a valid rule?

    Directory of Open Access Journals (Sweden)

    Oveisgharan Sh

    2003-07-01

    Full Text Available Background: Iranian talented university students who take semester averages below 17 for at most two times can't use facilities provided for Gifted and Talented students in Universities through Ministry of Health (MOH directive regarding gifted and talented student. Purpose: To examine the validity of article 13 of this directive. Methods: Renzulli's three ring concept of giftedness was chosen as giftedness definition. Obtaining Grade Point Averages equal or more than 15 was regarded as "above average ability". A questionnaire, based on “Scales for Rating the Behavioural Characteristics of Superior Students” was designed for "creativity" and "task commitment" evaluation. Score 3.00 or more in "creativity" and "task commitment" evaluation was regarded to be sufficient to keep the student in the program. Students who were admitted in Isfahan University of Medical Sciences during 1997-1999 and recognized as gifted initially by MOH were included in our study. Results: 147 students were included in this study, of which 50% were female. From the study group, 20 student reports, done by 39 students were evaluated. Of these 39 students, 31 would have been left out based on article. Out of 31 students, 18 met all three criteria of Renzulli's definition. Conclusion: There may be gifted student who are denied the opportunity of using the facilities provided for gifted student based on enforcement of article 13 of IGCT directive. Further study to devise better measure for identification of gifted student seems to be warranted. Keywords: GIFTED, IDENTIFICATION, ISFAHAN UNIVERSITY OF MEDICAL SCIENCES

  9. Preschool Gender-Typed Play Behavior at Age 3.5 Years Predicts Physical Aggression at Age 13 Years.

    Science.gov (United States)

    Kung, Karson T F; Li, Gu; Golding, Jean; Hines, Melissa

    2018-05-01

    Gender differences in play behavior and physical aggression have been consistently reported. Theoretical perspectives concerning evolutionary, social, and social-cognitive mechanisms suggest that male-typical play behavior during childhood increases subsequent physical aggression. The evidence supporting these connections is limited, however. The present study investigated the association between gender-typed play behavior in early childhood and physical aggression in early adolescence using a sample drawn from a longitudinal, population study, the Avon Longitudinal Study of Parents and Children. Based on gender-typed play behavior as measured by the Pre-School Activities Inventory at age 3.5 years, samples of masculine (64 boys, 60 girls), feminine (80 boys, 66 girls), and randomly selected control children (55 boys, 67 girls) were recruited at age 13 years and administered the Reinisch Aggression Inventory. After controlling for a range of sociodemographic variables, maternal characteristics, and behavioral problems, including hyperactivity and conduct problems at age 3.5, significant group differences in physical aggression at age 13 were found among children classified as masculine, control, and feminine at age 3.5. Masculine children exhibited significantly more physical aggression than control children or feminine children, and control children exhibited significantly more physical aggression than feminine children. The association between gender-typed play behavior and physical aggression was not moderated by sex. These results suggest that the degree of childhood gender-typed play behavior independently predicts the degree of physical aggression at adolescence in boys and in girls.

  10. A new approach to age-period-cohort analysis using partial least squares regression: the trend in blood pressure in the Glasgow Alumni cohort.

    Directory of Open Access Journals (Sweden)

    Yu-Kang Tu

    2011-04-01

    Full Text Available Due to a problem of identification, how to estimate the distinct effects of age, time period and cohort has been a controversial issue in the analysis of trends in health outcomes in epidemiology. In this study, we propose a novel approach, partial least squares (PLS analysis, to separate the effects of age, period, and cohort. Our example for illustration is taken from the Glasgow Alumni cohort. A total of 15,322 students (11,755 men and 3,567 women received medical screening at the Glasgow University between 1948 and 1968. The aim is to investigate the secular trends in blood pressure over 1925 and 1950 while taking into account the year of examination and age at examination. We excluded students born before 1925 or aged over 25 years at examination and those with missing values in confounders from the analyses, resulting in 12,546 and 12,516 students for analysis of systolic and diastolic blood pressure, respectively. PLS analysis shows that both systolic and diastolic blood pressure increased with students' age, and students born later had on average lower blood pressure (SBP: -0.17 mmHg/per year [95% confidence intervals: -0.19 to -0.15] for men and -0.25 [-0.28 to -0.22] for women; DBP: -0.14 [-0.15 to -0.13] for men; -0.09 [-0.11 to -0.07] for women. PLS also shows a decreasing trend in blood pressure over the examination period. As identification is not a problem for PLS, it provides a flexible modelling strategy for age-period-cohort analysis. More emphasis is then required to clarify the substantive and conceptual issues surrounding the definitions and interpretations of age, period and cohort effects.

  11. Genotyping of K-ras codons 12 and 13 mutations in colorectal cancer by capillary electrophoresis.

    Science.gov (United States)

    Chen, Yen-Ling; Chang, Ya-Sian; Chang, Jan-Gowth; Wu, Shou-Mei

    2009-06-26

    Point mutations of the K-ras gene located in codons 12 and 13 cause poor responses to the anti-epidermal growth factor receptor (anti-EGFR) therapy of colorectal cancer (CRC) patients. Besides, mutations of K-ras gene have also been proven to play an important role in human tumor progression. We established a simple and effective capillary electrophoresis (CE) method for simultaneous point mutation detection in codons 12 and 13 of K-ras gene. We combined one universal fluorescence-based nonhuman-sequence primer and two fragment-oriented primers in one tube, and performed this two-in-one polymerase chain reaction (PCR). PCR fragments included wild type and seven point mutations at codons 12 and 13 of K-ras gene. The amplicons were analyzed by single-strand conformation polymorphism (SSCP)-CE method. The CE analysis was performed by using a 1x Tris-borate-EDTA (TBE) buffer containing 1.5% (w/v) hydroxyethylcellulose (HEC) (MW 250,000) under reverse polarity with 15 degrees C and 30 degrees C. Ninety colorectal cancer patients were blindly genotyped using this developed method. The results showed good agreement with those of DNA sequencing method. The SSCP-CE was feasible for mutation screening of K-ras gene in populations.

  12. Proposition of decision limits for serum lipids in Brazilian children aged one to 13 years.

    Science.gov (United States)

    Slhessarenko, Natasha; Fontes, Cor J F; Slhessarenko, Maria Eduarda; Azevedo, Raymundo S; Andriolo, Adagmar

    2018-03-09

    To determine decision limits for total cholesterol, LDL-cholesterol, non-HDL cholesterol, HDL-cholesterol, and triglycerides in healthy children and adolescents from Cuiabá, Brazil. This was a cross-sectional study of 1866 healthy children and adolescents randomly selected from daycare centers and public schools in Cuiabá. The desirable levels of serum lipids were defined using the classic criteria, i.e., total cholesterol, LDL-cholesterol, non-HDL cholesterol, and triglycerides levels below the P75 percentile, and HDL-c above the P10 percentile. For CT, P75 was: 160mg/dL for the age range of 1 to <3 years, 170mg/dL for ≥3 to <9 years, and 176mg/dL for ≥9 to <13 years. For non-HDL cholesterol, it was 122mg/dL for the age range of 1 to <13 years. For LDL-c, it was 104mg/dL at the age range of 1 to <9 years and 106mg/dL from ≥9 to <13 years. For TG, it was 127mg/dL from 1 to <2 years; 98mg/dL from ≥2 to <6 years; and 92mg/dL from ≥6 to <13 years. As for HDL-cholesterol, P10 was 24mg/dL, 28mg/dL, 32mg/dL, and 36mg/dL, for the age ranges of 1 to <2 years, ≥2 to <3 years, ≥3 to <4 years, and ≥4 to <13 years, respectively. The decision limits for the serum lipid levels defined in this study differed from those observed in the current Brazilian and North-American guidelines, especially because it differentiates between the age ranges. Using these decision limits in clinical practice will certainly contribute to improve the diagnostic accuracy for dyslipidemia in this population group. Copyright © 2018 Sociedade Brasileira de Pediatria. Published by Elsevier Editora Ltda. All rights reserved.

  13. Gas swelling behaviour at different stages in Li4Ti5O12/LiNi1/3Co1/3Mn1/3O2 pouch cells

    Science.gov (United States)

    Liu, Wei; Liu, Haohan; Wang, Qian; Zhang, Jian; Xia, Baojia; Min, Guoquan

    2017-11-01

    Gas swelling behaviour is a major drawback of batteries that are based on Li4Ti5O12 anode materials and hinders their application. In this article, the morphology and electronic structure changes of Li4Ti5O12 electrodes at ageing and cycling stages are investigated using scanning electron microscopy, X-ray absorption near-edge structure and X-ray photoelectron spectroscopy. A simple method that uses an air bag to collect the generated gases was conducted and the gases were then characterised by gas chromatography/mass spectrometry. The results indicate that the charge transformation of Ti ions would aggravate the gas swelling behaviour. The solid electrolyte interphase (SEI) films form on the surface of the Li4Ti5O12 particles and become thicker with increasing charge state. The gas components change significantly during the ageing and cycling, indicating the complexity of the gas swelling mechanism.

  14. Parenting clinically anxious versus healthy control children aged 4-12 years

    NARCIS (Netherlands)

    van der Sluis, C.M.; van Steensel, F.J.A.; Bögels, S.M.

    2015-01-01

    This study investigated whether parenting behaviors differed between parents of 68 clinically anxious children and 106 healthy control children aged 4-12 years. The effects of parent gender, child gender and child age on parenting were explored. Mothers and fathers completed a questionnaire to

  15. 19q12q13.2 duplication syndrome: neuropsychiatric long-term follow-up of a new case and literature update

    Directory of Open Access Journals (Sweden)

    Nacinovich R

    2017-10-01

    Full Text Available Renata Nacinovich,1,2 Nicoletta Villa,3 Fiorenza Broggi,1,2 Cristina Tavaniello,1 Monica Bomba,1 Donatella Conconi,2 Serena Redaelli,2 Elena Sala,3 Marialuisa Lavitrano,2 Francesca Neri1,2 1Childhood and Adolescence Neuropsychiatric Unit, San Gerardo Hospital, 2School of Medicine and Surgery, University of Milano Bicocca, 3Medical Genetics Laboratory, Clinical Pathology Department, San Gerardo Hospital, Monza, Italy Abstract: Genetic syndromes are well characterized by the phenotypic point of view, but little is known about their progression and patients’ quality of life. We report a 10-year neuropsychiatric follow-up of a boy with duplication of chromosome 19. Cytogenetic investigation was requested at the age of 5 years for psychomotor and speech delay. The genomic study identified an 8.17 Mb duplication on chromosome 19q12q13.2. We propose that the long-term follow-up of our patient would help to delineate the neuropsychiatric phenotype associated with 19q duplication. This study could be a model for further long-term research in the neuropsychiatric follow-up of patients with 19q duplication syndrome. Keywords: 19q duplication, neuropsychiatric follow-up, array-CGH

  16. Implementation of the Social Decision-Making Skills Curriculum on Primary Students (Grades 1-3) in Lebanon

    Science.gov (United States)

    El Hassan, Karma; Mouganie, Zeina

    2014-01-01

    This study investigated the effect of the Social Decision-Making Skills Curriculum (SDSC) on the emotional intelligence and the prosocial behaviors of primary students in Grades 1-3, in a private school in Lebanon. Students were trained in social problem-solving and social decision-making skills through the implementation of the SDSC. Participants…

  17. California K-12 Schools and Communities Collaborate to Support Student Mental Health

    Science.gov (United States)

    Woodbridge, Michelle W.; Goldweber, Asha; Yu, Jennifer; Golan, Shari; Stein, Bradley D.

    2013-01-01

    Across the education, public health, and human and social services areas, there is renewed interest in bringing agency representatives together to work on the promotion of student mental health and wellness. One of the aims of California's Prevention and Early Intervention (PEI) K-12 Student Mental Health (SMH) initiative funded under Proposition…

  18. Nursing Students' Attitudes Toward the Aged as a Function of Death Anxiety.

    Science.gov (United States)

    Blackie, Norman K.

    A 139-item questionnaire was constructed to account for additional variance in the attitudes and behaviors of student nurses toward the aged. This study was conducted to examine the effects of death anxiety on the attitudes and behaviors of student nurses toward old persons. To this end, 150 student nurses were surveyed. Eight scales were…

  19. Coating effect of LiFePO4 and Al2O3 on Li1.2Mn0.54Ni0.13Co0.13O2 cathode surface for lithium ion batteries

    CSIR Research Space (South Africa)

    Seteni, Bonani

    2017-06-01

    Full Text Available Lithium-manganese-rich cathode material Li1.2Mn0.54Ni0.13Co0.13O2 is prepared by combustion method, and then coated with nano-sized LiFePO4 and nano-sized Al2O3 particles via a wet chemical process. The as-prepared Li1.2Mn0.54Ni0.13Co0.13O2, LiFePO4...

  20. Peer Mentoring and Peer Tutoring among K-12 Students: A Literature Review

    Science.gov (United States)

    Goodrich, Andrew

    2018-01-01

    The purpose of this literature review is to examine research on peer mentoring among K-12 students to assist practitioners with how to incorporate these instructional techniques into their own music programs. Primary themes across the music education literature of peer mentoring include the role of music teachers, the role of students as they…

  1. [Current situation of sleeping duration in Chinese Han students in 2010].

    Science.gov (United States)

    Song, Yi; Zhang, Bing; Hu, Peijin; Ma, Jun

    2014-07-01

    To analyze the characteristics of sleep duration in Chinese primary and middle school students. The data was collected from 30 provinces (Autonomous regions, Municipalities) in 165 363 Han Primary school students above 4 grade, the junior and senior high school students who participated in 2010 National Physical Fitness and Health Surveillance by using stratified random cluster sampling method, and the questionnaire of sleep duration, insufficient sleep and commuting way from school was conducted at the same time.χ² test and χ² linear-by-linear test were used to analyze the difference between the different groups, and logistic regression was used to analyze the factors of insufficient sleep. Nationwide in 2010, 39.09% (64 646/165 363) of students reported they had more than 8 hours sleep duration per day, the prevalence was lower among urban (37.06% (30 767/83 027)) than rural (41.15% (33 879/82 336)) students (χ² = 290.53, P sleep duration per day in 9-12 years group, 13-15 years group and 16-18 years group was 70.24% (43 934/62 549), 31.31% (16 166/51 652) and 8.89% (546/51 162), respectively, and decreased with the age increasing (χ² linear-by-linear = 50 617.75, P sleep was 93.64% (154 838/165 363) in total students, the prevalence was higher among urban (94.94% (78 829/83 027)) than rural students (92.32% (76 009/82 336)) (χ² = 479.14, P sleep in 9-12 years group, 13-15 years group and 16-18 years group was 96.42% (60 310/62 549), 92.76% (47 912/51 562) and 91.11% (46 616/51 162), respectively. A multivariate logistic regression analysis (OR (95% CI)) revealed that the insufficient sleep was significantly associated with being urban (1.58 (1.51-1.65)), being girls (1.39 (1.34-1.45)), being 9-12 years group (2.77 (2.62-2.93)), living in the middle (1.19 (1.13-1.25)) or western (1.08 (1.03-1.13)) of China, and commuting from school by bicycle (1.21 (1.14-1.28)), bus/car (1.09 (1.03-1.15)), or in a boarding school (1.17 (1.10-1.24)). The sleep duration

  2. The importance of age composition of 12-step meetings as a moderating factor in the relation between young adults' 12-step participation and abstinence.

    Science.gov (United States)

    Labbe, Allison K; Greene, Claire; Bergman, Brandon G; Hoeppner, Bettina; Kelly, John F

    2013-12-01

    Participation in 12-step mutual help organizations (MHO) is a common continuing care recommendation for adults; however, little is known about the effects of MHO participation among young adults (i.e., ages 18-25 years) for whom the typically older age composition at meetings may serve as a barrier to engagement and benefits. This study examined whether the age composition of 12-step meetings moderated the recovery benefits derived from attending MHOs. Young adults (n=302; 18-24 years; 26% female; 94% White) enrolled in a naturalistic study of residential treatment effectiveness were assessed at intake, and 3, 6, and 12 months later on 12-step attendance, age composition of attended 12-step groups, and treatment outcome (Percent Days Abstinent [PDA]). Hierarchical linear models (HLM) tested the moderating effect of age composition on PDA concurrently and in lagged models controlling for confounds. A significant three-way interaction between attendance, age composition, and time was detected in the concurrent (p=0.002), but not lagged, model (b=0.38, p=0.46). Specifically, a similar age composition was helpful early post-treatment among low 12-step attendees, but became detrimental over time. Treatment and other referral agencies might enhance the likelihood of successful remission and recovery among young adults by locating and initially linking such individuals to age appropriate groups. Once engaged, however, it may be prudent to encourage gradual integration into the broader mixed-age range of 12-step meetings, wherein it is possible that older members may provide the depth and length of sober experience needed to carry young adults forward into long-term recovery. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  3. Magnetocaloric effect, thermal conductivity, and magnetostriction of epoxy-bonded La(Fe0.88Si0.12)13 hydrides

    Science.gov (United States)

    Matsumoto, K.; Murayama, D.; Takeshita, M.; Ura, Y.; Abe, S.; Numazawa, T.; Takata, H.; Matsumoto, Y.; Kuriiwa, T.

    2017-09-01

    Magnetic materials with large magnetocaloric effect are significantly important for magnetic refrigeration. La(Fe0.88Si0.12)13 compounds are one of the promising magnetocaloric materials that have a first order magnetic phase transition. Transition temperature of hydrogenated La(Fe0.88Si0.12)13 increased up to room temperature region while keeping metamagnetic transition properties. From view point of practical usage, bonded composite are very attractive and their properties are important. We made epoxy bonded La(Fe0.88Si0.12)13 hydrides. Magnetocaloric effect was studied by measuring specific heat, magnetization, and temperature change in adiabatic demagnetization. The composite had about 20% smaller entropy change from the hydrogenated La(Fe0.88Si0.12)13 powder in 2 T. Thermal conductivity of the composite was several times smaller than La(Fe,Si)13. The small thermal conductivity was explained due to the small thermal conductivity of epoxy. Thermal conductivity was observed to be insensitive to magnetic field in 2 T. Thermal expansion and magnetostriction of the composite material were measured. The composite expanded about 0.25% when it entered into ferromagnetic phase. Magnetostriction of the composite in ferromagnetic phase was about 0.2% in 5 T and much larger than that in paramagnetic phase. The composite didn’t break after about 100 times magnetic field changes in adiabatic demagnetization experiment even though it has magnetostriction.

  4. The prevalence of dental erosion and associated risk factors in 12-13-year-old school children in Southern China.

    Science.gov (United States)

    Wang, Ping; Lin, Huan Cai; Chen, Jian Hong; Liang, Huan You

    2010-08-12

    Dental erosion has been investigated in developed and developing countries and the prevalence varies considerably in different countries, geographic locations, and age groups. With the lifestyle of the Chinese people changing significantly over the decades, dental erosion has begun to receive more attention. However, the information about dental erosion in China is scarce. The purpose of this study was to explore the prevalence of dental erosion and associated risk factors in 12-13-year-old school children in Guangzhou, Southern China. This cross-sectional survey was performed by two trained, calibrated examiners. A stratified random sample of 12-13-year-old children (774 boys and 725 girls) from 10 schools was examined for dental erosion using the diagnostic criteria of Eccles and the index of O'Sullivan was applied to record the distribution, severity, and amount of the lesions. Data on the socio-economic status, health behaviours, and general health involved in the etiology of dental erosion were obtained from a self-completed questionnaire. The analyses were performed using SPSS software. At least one tooth surface with signs of erosion was found in 416 children (27.3%). The most frequently affected teeth were the central incisors (upper central incisors, 16.3% and 15.9%; lower central incisors, 17.4% and 14.8%). The most frequently affected surface was the incisal or occlusal edge (43.2%). The loss of enamel contour was present in 54.6% of the tooth surfaces with erosion. Of the affected tooth surfaces, 69.3% had greater than one-half of the tooth surface was affected. The results from logistic regression analysis demonstrated that the children who were female, consumed carbonated drinks once a week or more, and those whose mothers were educated to the primary level tended to have more dental erosion. Dental erosion in 12-13-year-old Chinese school children is becoming a significant problem. A strategy of offering preventive care, including more campaigns

  5. Smoking Prevalence and Related Factors Among Secondary and High School Students in Tokat Province

    Directory of Open Access Journals (Sweden)

    Gizem Emekdar

    2017-03-01

    Full Text Available Smoking Prevalence and Related Factors Among Secondary and High School Students in Tokat Province Objective: The tobacco epidemic is one of the biggest public health threats in the world. The majority of smokers in the adolescent group has started smoking at early ages. Smoking prevalence among adolescents are reported to be approximately 10%. This study was aimed to determine the prevalence of smoking and related factors among secondary and high school students in Tokat province. Method: Population of this cross-sectional study consists of secondary and high school students in Tokat. Sample size was calculated as 1072 by using proportional stratified cluster sampling method according to type of school, gender and age. The study has been completed with 1069 students (secondary school: 557, high school: 512. Sociodemographic characteristics and the smoking habits of students were determined through questionaries. The students who smoking at least one cigarette in a day were accepted as smokers. Results: 50.9% of secondary school students were male, mean age was 12.1±1.3, 74.5% lived in city, prevalence of smoking was 10.8% (male:17.3%, female:4% and it was higher for students with <70 (16.3% average school grades than those with ≥70 (6.8% (p<0.05. 52.3% of high school students were female, mean age was 16.2±1.3, 80.7% lived in city, prevalence of smoking was 18% (male:29.9%, female:7.1% and it was higher for students which have secondary or above maternal education level (23.8% than those students which have lower maternal education level (15.7%; higher in those whom parents live seperate or have died (42.3% than those whom parents live together (16.7%; higher in those that have average school grades <70 (23.8% than those with ≥70 (11.3% (p<0.05. Place of residence, income level and profession of parents were not significant effect on smoking prevalence. The most common cause of start smoking was curiosity (42.4%. Conclusions: Nearly one in

  6. DAMPAK DEFISIENSI IODIUM MATERNAL PADA PERSISTENSI DISFUNGSI NEUROPSIKOLOGIS ANAK USIA 12 TAHUN (EFFECT OF MATERNAL IODINE DEFICIENCY ON THE PERSISTENCE OF NEUROLOGICAL DYSFUNCTIONS IN CHILDREN AGED 12 YEARS

    Directory of Open Access Journals (Sweden)

    Basuki Budiman

    2012-06-01

    Full Text Available ABSTRACT Study on the last effect of neuropsychologic dysfunction due to iodine deficiency during gestation is still scarce. This study is to confirm the persistence of neuropsychological dysfunctions at 12-year-old of children born from pregnant mothers with iodine deficiency in endemic iodine deficient area. The study is 13-year-cohort design. Iodine status (Total T4, TSH and UIE of pregnant mothers at initial study, neonatal (TSH and 12 year-old iodine status (fT4, TSH are performed. Neurological dysfunction of infants is examined every 6 weeks until the child age is 24 months. Neuropsychological dysfunction of children 12 years of age such as minimal brain dysfunction and psychological battery of Wechsler Intelligence Scale for Children (WISC are also administered. A screening to determine case and reference using is done using mini mental status examination (MMSE. Score MMSE of 28 or less are implemented as cases while others as reference. The relationship of neurological and cognitive dysfunction with both maternal iodine status and neurological dysfunction at 2 months of neonates age are elaborated. The persistency risk of neurological dysfunction at 12 years of age is 8% (95%ci: 1-15%. Maternal and neonatal iodine status (as indicated by TSH, T4 are the risk factors for the persistency at 12-years. However, delays of neurological development in two-month old infants are found as directly risk factors. Median Total IQ score for all participants are far lower than the lowest limit of normal range. A very significant difference (p=0.000 are found in Total IQ score between cases and references. Discrepancy analysis of IQV-IQP indicates brain lesions in subtle form, such as diadokhokinesis, praxis, memory, distractibility and lowered IQ score. Neuropsychological dysfunctions due maternal iodine deficiency are still persistence at 12 years. Maternal T4 during gestation is not only influences on the persistency but also impaires directly on the

  7. Oral hygiene KAP assessment and DMFT scoring among children aged 11-12 years in an urban school of Karachi.

    Science.gov (United States)

    Vakani, Farhan; Basaria, Nadia; Katpar, Shahjahan

    2011-04-01

    To assess the oral hygiene knowledge, attitude and practices among school children and evaluate their DMFT (Decayed/Missing/Filled Teeth) scores. Cross-sectional study. A private school of Karachi from March to April 2008. Convenient sample comprising 300 students of grade 6 within the age group of 11-12 years was selected. A knowledge, attitude and practices survey questionnaire based on quantitative indicators was filled by the students. Clinical examination was done for DMFT. Data analysis was done by using SPSS version 11. Associations were assessed using chi-square test and a p-value of importance of a dentist's role in maintaining their dental health. Only a few students (11.3%) had familiarity with dental floss. A statistically significant association was found between frequency of brushing and children's knowledge of the problems related to irregular tooth brushing (p < 0.001). The attitude of school children towards dental health and dental service utilization is determined by certain social and cultural factors. The mean DMFT of 1.27 showed that there must have been some poor oral practices that are contributing towards a higher mean.

  8. REPETITIVE STRENGTH AMONG STUDENTS OF AGE 14

    Directory of Open Access Journals (Sweden)

    Besim Halilaj

    2014-06-01

    Full Text Available The study involved 82 male students of the primary school “Qamil Ilazi” in Kaçanik-Kosovo.Four movement tests, which test the repetitive strength, were conducted: 1. Pull-up, 2. Sit-Up, 3. Back extension, 4. Push-up.The main goal of this study was to verify the actual motor status, respectively the component of the repetitive strength among students of age 14 of masculine gender. In addition to verifying the actual motor status, another objective was to verify the relationship between the variables employed.Basic statistical parameters show a distribution which is not significantly different from the normal distribution, yielded highly correlative values among the repetitive strength tests. Space factorization resulted in extracting two latent squares defined as repetitive strength of arms factor, and repetitive strength of body factor.

  9. Electronic structure of the boron fullerene B14 and its silicon derivatives B13Si(+), B13Si(-) and B12Si2: a rationalization using a cylinder model.

    Science.gov (United States)

    Van Duong, Long; Nguyen, Minh Tho

    2016-06-29

    Geometric and electronic structures of the boron cluster B14 and its silicon derivatives B13Si(+), B13Si(-), and B12Si2 were determined using DFT calculations (TPSSh/6-311+G(d)). The B12Si2 fullerene, which is formed by substituting two B atoms at two apex positions of the B14 fullerene by two Si atoms, was also found as the global minimum structure. We demonstrated that the electronic structure and orbital configuration of these small fullerenes can be predicted by the wavefunctions of a particle on a cylinder. The early appearance of high angular node MOs in B14 and B12Si2 can be understood by this simple model. Replacement of one B atom at a top position of B14 by one Si atom, followed by the addition or removal of one electron does not lead to a global minimum fullerene structure for the anion B13Si(-) and cation B13Si(+). The early appearance of the 5σ1 orbital in B13Si(+) causes a lower stability for the fullerene-type structure.

  10. Mental health status among Japanese medical students: a cross-sectional survey of 20 universities.

    Science.gov (United States)

    Ohtsu, Tadahiro; Kaneita, Yoshitaka; Osaki, Yoneatsu; Kokaze, Akatsuki; Ochiai, Hirotaka; Shirasawa, Takako; Nanri, Hinako; Ohida, Takashi

    2014-12-01

    The purposes of this study were to evaluate the mental health status of Japanese medical students and to examine differences based on gender, as well as on university type and location, using the results of a nationwide survey. Between December 2006 and March 2007, we conducted a questionnaire survey among fourth-year medical students at 20 randomly selected medical schools in Japan. The data from 1,619 students (response rate: 90.6%; male: 1,074; female: 545) were analyzed. We used the Japanese version of the 12-item General Health Questionnaire (GHQ-12) to measure mental health status. Poor mental health status (GHQ-12 score of 4 points or higher) was observed in 36.6% and 48.8% of the male and female medical students, respectively. The ratio of the age-adjusted prevalence of poor mental health status in female versus male medical students was 1.33 (95% confidence interval: 1.10-1.62). The universities were categorized into two groups based on the university type (national/public: 15 vs. private: 5) or location (in a large city: 7 vs. in a local city: 13 cities). The prevalence of poor mental health status in both men and women differed between these groups, although not significantly. The GHQ-12 scores in men significantly differed between the categorized groups of universities. These results suggest that adequate attention must be paid to the mental health of medical students, especially females, and that a system for providing mental health care for medical students must be established in the context of actual conditions at each university.

  11. Beta Testing an Oral Health Edutainment Card Game Among 12-13-Year-Old Children in Bangalore, India.

    Science.gov (United States)

    Harikiran, Arkalgud Govindraju; Vadavi, Deepti; Shruti, Tulika

    2017-12-01

    Card games are easy, cost effective, culturally acceptable, as well as sustainable and require minimal infrastructure over other edutainment approaches in achieving health and oral health promotion goals. Therefore, we wanted to conceptualize, develop, and beta test an innovative oral health edutainment card game for preadolescent children in Bangalore, India. An innovative oral health card game, titled "32 warriors" was conceptualized and developed to incorporate age appropriate, medically accurate oral health information. The card game aimed at empowering children to take appropriate care of their oral health. The card game was beta tested on 45 children, aged between 12 and 13 years. Using prepost design, a 32-itemed, closed-ended questionnaire assessed children's oral health knowledge, attitude, and feedback on the game. Change in mean scores for knowledge and attitude was assessed using "Wilcoxon Sign Rank test" at P game and learned new things about oral health. The card game is appealing to children and improves their oral health knowledge and attitude as evidenced by beta test results. We need to further explore the demand, feasibility, and cost effectiveness of introducing this game in formal settings (school based)/informal settings (family and other social settings).

  12. A new, high energy rechargeable lithium ion battery with a surface-treated Li{sub 1.2}Mn{sub 0.54}Ni{sub 0.13}Co{sub 0.13}O{sub 2} cathode and a nano-structured Li{sub 4}Ti{sub 5}O{sub 12} anode

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Xiaoyu; Huang, Tao; Yu, Aishui, E-mail: asyu@fudan.edu.cn

    2015-11-05

    Through elaborate design, a new rechargeable lithium ion battery has been developed by comprising a surface-treated Li{sub 1.2}Mn{sub 0.54}Ni{sub 0.13}Co{sub 0.13}O{sub 2} cathode and a nano-structured Li{sub 4}Ti{sub 5}O{sub 12} anode. After precondition Na{sub 2}S{sub 2}O{sub 8} treatment, the initial coulombic efficiency of Li{sub 1.2}Mn{sub 0.54}Ni{sub 0.13}Co{sub 0.13}O{sub 2} cathode has been significantly increased and can be compatible with that of the nano-structured Li{sub 4}Ti{sub 5}O{sub 12} anode. The optimization of structure and morphology for both active electrode materials result in their remarkable electrochemical performances in respective lithium half-cells. Ultimately, the rechargeable lithium ion full battery consisting of both electrodes delivers a specific capacity of 99.0 mAh g{sup −1} and a practical energy density of 201 Wh kg{sup −1}, based on the total weight of both active electrode materials. Furthermore, as a promising candidate in the lithium ion battery field, this full battery also achieves highly attractive electrochemical performance with high coulombic efficiency, excellent cycling stability and outstanding rate capability. Thus the proposed battery displays broad practical application prospects for next generation of high-energy lithium ion battery. - Highlights: • The Li{sub 1.2}Mn{sub 0.54}Ni{sub 0.13}Co{sub 0.13}O{sub 2} cathode is surface-treated by Na{sub 2}S{sub 2}O{sub 8}. • The nano-sized Li{sub 4}Ti{sub 5}O{sub 12} anode is obtained by a solid-state method. • A new Li{sub 1.2}Mn{sub 0.54}Ni{sub 0.13}Co{sub 0.13}O{sub 2}/Li{sub 4}Ti{sub 5}O{sub 12} lithium ion battery is developed. • The battery shows high coulombic efficiency, specific capacity and energy density. • The battery shows high capacity retention rate and good high-rate capability.

  13. Cognitive Functions in Elite and Sub-Elite Youth Soccer Players Aged 13 to 17 Years.

    Directory of Open Access Journals (Sweden)

    Barbara C H Huijgen

    Full Text Available Soccer players are required to anticipate and react continuously in a changing, relatively unpredictable situation in the field. Cognitive functions might be important to be successful in soccer. The current study investigated the relationship between cognitive functions and performance level in elite and sub-elite youth soccer players aged 13-17 years. A total of 47 elite youth soccer players (mean age 15.5 years, SD = 0.9 and 41 sub-elite youth soccer players (mean age 15.2 years, SD = 1.2 performed tasks for "higher-level" cognitive functions measuring working memory (i.e., Visual Memory Span, inhibitory control (i.e., Stop-Signal Task, cognitive flexibility (i.e., Trail Making Test, and metacognition (i.e., Delis-Kaplan Executive Function System Design Fluency Test. "Lower-level" cognitive processes, i.e., reaction time and visuo-perceptual abilities, were also measured with the previous tasks. ANOVA's showed that elite players outscored sub-elite players at the "higher-level" cognitive tasks only, especially on metacognition (p .05. In conclusion, elite youth soccer players have better inhibitory control, cognitive flexibility, and especially metacognition than their sub-elite counterparts. However, when training hours are taken into account, differences between elite and sub-elite youth soccer players remain apparent on inhibitory control and cognitive flexibility in contrast to metacognition. This highlights the need for longitudinal studies to further investigate the importance of "higher-level" cognitive functions for talent identification, talent development and performance in soccer.

  14. Cognitive Functions in Elite and Sub-Elite Youth Soccer Players Aged 13 to 17 Years

    Science.gov (United States)

    Huijgen, Barbara C. H.; Leemhuis, Sander; Kok, Niels M.; Verburgh, Lot; Oosterlaan, Jaap; Elferink-Gemser, Marije T.; Visscher, Chris

    2015-01-01

    Soccer players are required to anticipate and react continuously in a changing, relatively unpredictable situation in the field. Cognitive functions might be important to be successful in soccer. The current study investigated the relationship between cognitive functions and performance level in elite and sub-elite youth soccer players aged 13–17 years. A total of 47 elite youth soccer players (mean age 15.5 years, SD = 0.9) and 41 sub-elite youth soccer players (mean age 15.2 years, SD = 1.2) performed tasks for “higher-level” cognitive functions measuring working memory (i.e., Visual Memory Span), inhibitory control (i.e., Stop-Signal Task), cognitive flexibility (i.e., Trail Making Test), and metacognition (i.e., Delis-Kaplan Executive Function System Design Fluency Test). “Lower-level” cognitive processes, i.e., reaction time and visuo-perceptual abilities, were also measured with the previous tasks. ANOVA’s showed that elite players outscored sub-elite players at the “higher-level” cognitive tasks only, especially on metacognition (p .05). In conclusion, elite youth soccer players have better inhibitory control, cognitive flexibility, and especially metacognition than their sub-elite counterparts. However, when training hours are taken into account, differences between elite and sub-elite youth soccer players remain apparent on inhibitory control and cognitive flexibility in contrast to metacognition. This highlights the need for longitudinal studies to further investigate the importance of “higher-level” cognitive functions for talent identification, talent development and performance in soccer. PMID:26657073

  15. Isotopic signatures (13C/12C; 15N/14N) of blue penguin burrow soil invertebrates : carbon sources and trophic relationships

    International Nuclear Information System (INIS)

    Hawke, D.J.; Clark, J.M.

    2010-01-01

    Seabird burrows provide a soil environment for processing discards such as feathers and guano, hence constituting a primary interface between the sea and the land. This study involved collection and culturing of soil invertebrates from three blue penguin (Eudyptula minor) burrows, and examined their 13 C/ 12 C and 15 N/ 14 N isotopic composition in relation to potential burrow resources (terrestrial plant litter, burrow soil, guano, blue penguin feathers). Two taxa (cerylonid beetles and small tineid moth larvae) had a depleted 13 C/ 12 C indicative of a level of dependence on C from terrestrial soil. Tineid moth larvae (Monopis crocicapitella and (or) M. ethelella) substantially increased their 13 C/ 12 C enrichment during development, implying increasing dependence on marine C. Remaining taxa, both decomposers and predators, had 13 C/ 12 C intermediate between guano and feathers. Larval and emergent fleas had the most enriched 13 C/ 12 C , indicative of a greater dependence on feather C and the likelihood of co-processing with guano. Pseudoscorpions and histerid beetles had overlapping isotopic enrichments implying competition for prey, but were spatially separated in burrow soil. With their highly enriched 15 N/ 14 N and marine 13 C/ 12 C, larvae and protonymphs of the histiostomatid mite Myianoetus antipodus stood alone. Blue penguin burrows therefore support a diverse invertebrate fauna that incorporates terrestrial soil as well as varying proportions of the various blue penguin discards. (author). 45 refs., 1 fig., 1 tab.

  16. Role of Age, Siblings Verbal and Nonverbal Ability in Development of the Theory of Mind in Intellectually Disabled Students

    Directory of Open Access Journals (Sweden)

    Abbas Ali Yazdani

    2014-09-01

    Full Text Available Background: The purpose of this study is to investigate theory of mind development (TOM with regard to mental retarded students (MRS and its relationship with verbal and non-verbal abilities, and number of siblings. Materials and Methods: This study is a cross-sectional, for all male mental retarded students, age of 8 to 14 years (about 59 individuals which were from the city Torbat-e Heidarieh, Iran. Unexpected-content task (UCT and 38-items test were used for measuring TOM. Also, the Wechsler Intelligence Scale for children Revised (WISC-R was used to examine the verbal and non-verbal abilities. Information of siblings was established in an interview with the parents, also by looking at the students’ ID cards. In order to analyze data, ANOVA, Scheffe, Pearson correlation coefficient and chi- square were carried out. Results: First and second level theory of mind development with regard to intellectually disable students were ascending to 12 years age (p0.05. Conclusion: Altogether, the things “theory theory” and “modular” approaches state might be acceptable. Those theories which are based on sociocultural approaches expressing experiment of communication underlies mind understanding development must be more examined.

  17. Changes in vegetation phenology are not reflected in atmospheric CO2 and 13 C/12 C seasonality.

    Science.gov (United States)

    Gonsamo, Alemu; D'Odorico, Petra; Chen, Jing M; Wu, Chaoyang; Buchmann, Nina

    2017-10-01

    Northern terrestrial ecosystems have shown global warming-induced advances in start, delays in end, and thus increased lengths of growing season and gross photosynthesis in recent decades. The tradeoffs between seasonal dynamics of two opposing fluxes, CO 2 uptake through photosynthesis and release through respiration, determine the influence of the terrestrial ecosystem on the atmospheric CO 2 and 13 C/ 12 C seasonality. Here, we use four CO 2 observation stations in the Northern Hemisphere, namely Alert, La Jolla, Point Barrow, and Mauna Loa Observatory, to determine how changes in vegetation productivity and phenology, respiration, and air temperature affect both the atmospheric CO 2 and 13 C/ 12 C seasonality. Since the 1960s, the only significant long-term trend of CO 2 and 13 C/ 12 C seasonality was observed at the northern most station, Alert, where the spring CO 2 drawdown dates advanced by 0.65 ± 0.55 days yr -1 , contributing to a nonsignificant increase in length of the CO 2 uptake period (0.74 ± 0.67 days yr -1 ). For Point Barrow station, vegetation phenology changes in well-watered ecosystems such as the Canadian and western Siberian wetlands contributed the most to 13 C/ 12 C seasonality while the CO 2 seasonality was primarily linked to nontree vegetation. Our results indicate significant increase in the Northern Hemisphere soil respiration. This means, increased respiration of 13 C depleted plant materials cancels out the 12 C gain from enhanced vegetation activities during the start and end of growing season. These findings suggest therefore that parallel warming-induced increases both in photosynthesis and respiration contribute to the long-term stability of CO 2 and 13 C/ 12 C seasonality under changing climate and vegetation activity. The summer photosynthesis and the soil respiration in the dormant seasons have become more vigorous which lead to increased peak-to-through CO 2 amplitude. As the relative magnitude of the increased

  18. Prevalence and characteristics of overweight and obesity among Chinese youth aged 12-18 years: a multistage nationwide survey.

    Science.gov (United States)

    Tan, Y; Xin, X; Ming, Q

    2018-02-01

    The aims of the current study were to assess the prevalence of overweight and obesity by four different references and to explore the characteristics of adolescent overweight and obesity in Chinese secondary school students aged 12-18 years. A cross-sectional study was conducted in this study. Using stratified random cluster sampling, 8999 secondary school students were enrolled. The references developed by Must and Dallal and Dietz, the Childhood Obesity Working Group of the International Obesity Task Force, the US Centers for Disease Control and Prevention, and the Group of China Obesity Task Force (GCOTF reference) were used to identify overweight and obese students. The prevalence of adolescent overweight and obesity vary substantially based on the four references. The prevalence of adolescent overweight and obesity based on GCOTF reference are 8.4% and 4.1%, respectively, which is significantly lower than the prevalence of overweight and obesity in their peers in 2000 (χ 2  = 24.03, P obesity in boys are 12.0% and 5.7%, which are higher than those in girls, 4.6% and 5.7% (χ 2  = 240.68, P obesity in singletons are higher than those in non-singletons (χ 2  = 40.25, P obesity in students with lower school community ladder of subjective social status are higher than those from higher ones (χ 2  = 21.61, P obesity in Chinese adolescents. The current prevalence rates of adolescent overweight and obesity decreased, and girls made a tremendous contribution to this decreasing trend. Singletons and adolescents in lower school community ladder of subjective socio-economic status may be at higher risk of getting overweight and obesity. More effective strategies with full consideration to the characteristics above should be developed to control and prevent adolescent overweight and obesity. Copyright © 2017. Published by Elsevier Ltd.

  19. Measured performance of 12 demonstation projects - IEA Task 13 "advanced solar low energy buildings"

    DEFF Research Database (Denmark)

    Thomsen, Kirsten Engelund; Schultz, Jørgen Munthe; Poel, Bart

    2005-01-01

    This paper presents the results obtained from measurements and experiences gained from interviews on 12 advanced solar low energy houses designed and built as part of the IEA Solar Heating and Cooling Programme – Task 13. Three years after the IEA Task 13 formally ended, the results were collected...... climate conditions are compared and differences explained. Special innovative installations and systems are de-scribed and evaluated. In general the measured energy consumption was higher than the expected values due to user influence and unforeseen technical problems but still an energy saving of 60...

  20. Clinical Features of Human Metapneumovirus Infection in Ambulatory Children Aged 5-13 Years.

    Science.gov (United States)

    Howard, Leigh M; Edwards, Kathryn M; Zhu, Yuwei; Griffin, Marie R; Weinberg, Geoffrey A; Szilagyi, Peter G; Staat, Mary A; Payne, Daniel C; Williams, John V

    2018-05-15

    We detected human metapneumovirus (HMPV) in 54 (5%) of 1055 children aged 5 to 13 years with acute respiratory illness (ARI) identified by outpatient and emergency department surveillance between November and May 2003-2009. Its clinical features were similar to those of HMPV-negative ARI, except a diagnosis of pneumonia was more likely (13% vs 4%, respectively; P = .005) and a diagnosis of pharyngitis (7% vs 24%, respectively; P = .005) was less likely in patients with HMPV- positive ARI than those with HMPV-negative ARI.

  1. BMI, waist circumference at 8 and 12 years of age and FVC and FEV

    NARCIS (Netherlands)

    M.B.M. Bekkers (Marga); A.H. Wijga (Alet); U. Gehring (Ulrike); G.H. Koppelman (Gerard); J.C. de Jongste (Johan); H.A. Smit (Henriëtte); B. Brunekreef (Bert)

    2015-01-01

    textabstractBackground: In adults, overweight is associated with reduced lung function, in children evidence on this association is conflicting. We examined the association of body mass index (BMI) and waist circumference (WC) at age 12, and of persistently (at ages 8 and 12 years) high BMI and

  2. Eating patterns and mental health problems in early adolescence--a cross-sectional study of 12-13-year-old Norwegian schoolchildren.

    Science.gov (United States)

    Oellingrath, Inger M; Svendsen, Martin V; Hestetun, Ingebjørg

    2014-11-01

    To investigate the association between eating patterns and mental health problems in young Norwegian adolescents (12-13 years of age). Cross-sectional study. Dietary information was reported by parents using a retrospective FFQ. Eating patterns were identified using principal component analysis. The Strengths and Difficulties Questionnaire was used to measure mental health problems. The association between eating patterns and mental health problems was examined using multiple logistic regression analysis. Primary schools, Telemark County, Norway. Children (n 1095) aged 12-13 years and their parents. Children with high scores on a 'varied Norwegian' eating pattern were less likely to have indications of any psychiatric disorders (adjusted OR = 0·5; 95 % CI 0·3, 1·0) and hyperactivity-inattention disorders (adjusted OR = 0·4; 95 % CI 0·2, 0·8) than children with low scores on this pattern. Children with high scores on a 'junk/convenient' eating pattern were more likely to have indications of hyperactivity-inattention disorders (adjusted OR = 3·4; 95 % CI 1·3, 8·6) than children with low scores on this pattern. Children with high scores on a 'snacking' eating pattern were more likely to have indications of conduct/oppositional disorders (adjusted OR = 3·8; 95 % CI 1·2, 11·5) than those with low scores on this eating pattern. We identified a significant association between eating patterns and mental health problems in young adolescents, independently of physical activity, sedentary activity and background variables. A diverse diet rich in unrefined plant foods, fish and regular meals was associated with better mental health, while energy-dense, nutrient-poor diets and irregular meals were associated with poorer mental health.

  3. Investigating Student Use of Technology for Engaged Citizenship in A Global Age

    Directory of Open Access Journals (Sweden)

    Brad M. Maguth

    2012-05-01

    Full Text Available This study undertook a five month qualitative investigation into technology use amongst twelve high school social studies students in two different sites in the Midwestern United States. This study examined students’ use of technology and its relationship to three dimensions of citizenship in a global age: understand global events, issues, and perspectives, participate in global networks to communicate and collaborate with global audiences, and advocate on global problems and issues to think and act globally. Collecting data through semi-structured student interviews, online-threaded discussions and document analysis, I triangulated findings, and employed a qualitative approach. The study finds a relationship between student participants’ use of technology and their serving as engaged citizenship in a global age. In using technology, students accessed international news and information, joined global networks to communicate and collaborate with global audiences, and produced digital content for international audiences.

  4. The {sup 12}C/{sup 13}C Ratio in Sgr B2(N): Constraints for Galactic Chemical Evolution and Isotopic Chemistry

    Energy Technology Data Exchange (ETDEWEB)

    Halfen, D. T.; Ziurys, L. M. [Department of Chemistry and Biochemistry, University of Arizona, 1305 E. 4th Street, Tucson, AZ 85719 (United States); Woolf, N. J., E-mail: halfend@email.arizona.edu [Department of Astronomy, Arizona Radio Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

    2017-08-20

    A study has been conducted of {sup 12}C/{sup 13}C ratios in five complex molecules in the Galactic center. H{sub 2}CS, CH{sub 3}CCH, NH{sub 2}CHO, CH{sub 2}CHCN, and CH{sub 3}CH{sub 2}CN and their {sup 13}C-substituted species have been observed in numerous transitions at 1, 2, and 3 mm, acquired in a spectral-line survey of Sgr B2(N), conducted with the telescopes of the Arizona Radio Observatory (ARO). Between 22 and 54 individual, unblended lines for the {sup 12}C species and 2–54 for {sup 13}C-substituted analogs were modeled in a global radiative transfer analysis. All five molecules were found to consistently exhibit two velocity components near V {sub LSR} ∼ 64 and 73 km s{sup −1}, with column densities ranging from N {sub tot} ∼ 3 × 10{sup 14} − 4 × 10{sup 17} cm{sup −2} and ∼2 × 10{sup 13} − 1 × 10{sup 17} cm{sup −2} for the {sup 12}C and {sup 13}C species, respectively. Based on 14 different isotopic combinations, ratios were obtained in the range {sup 12}C/{sup 13}C = 15 ± 5 to 33 ± 13, with an average value of 24 ± 7, based on comparison of column densities. These measurements better anchor the {sup 12}C/{sup 13}C ratio at the Galactic center, and suggest a slightly revised isotope gradient of {sup 12}C/{sup 13}C = 5.21(0.52) D {sub GC} + 22.6(3.3). As indicated by the column densities, no preferential {sup 13}C enrichment was found on the differing carbon sites of CH{sub 3}CCH, CH{sub 2}CHCN, and CH{sub 3}CH{sub 2}CN. Because of the elevated temperatures in Sgr B2(N), {sup 13}C isotopic substitution is effectively “scrambled,” diminishing chemical fractionation effects. The resulting ratios thus reflect stellar nucleosynthesis and Galactic chemical evolution, as is likely the case for most warm clouds.

  5. Implementation of a Novel Laser System for Simultaneous Measurement of 13C/12C and D/H to Food Provenance

    Science.gov (United States)

    Saad, N.; Hoffnagle, J.

    2012-04-01

    Olive oil samples were analyzed using the world's first simultaneous δ13C + δD instrument, the 13C+D Combustion Module-Cavity Ringdown Spectroscopy (CM-CRDS) Isotope Analyzer. Simultaneous measurements of δ13C and δD of the whole oil have been performed on commercially available olive oils produced in Greece, Spain, Italy, California, Lebanon, Israel, Australia and Turkey. Together, the measurements of isotopic ratios of carbon (13C/12C) and hydrogen (D/H) produce statistically significant differentiation between olive oils from different locations around the globe. Stable isotope ratios are exquisitely sensitive to the biochemistry of plant species and the nutrients available to them in a particular geographical location. Isotope ratios provide detailed knowledge useful for forensic applications through a combination of stable-isotope measurements of carbon (13C/12C) and hydrogen (D/H) isotopes of organic matter and can help the associations among specific geographic areas through the measurement of these dual isotopes. We report here on the development of a novel laser spectroscopy based system for the simultaneous analysis of the stable isotope ratios of carbon (13C/12C) and hydrogen (D/H) that is robust, easy-to-use, and is the first stable isotope ratio analysis system to combine the measurement of 13C/12C and D/H in one simple analysis from a bulk organic sample. The system comprises a combustion module to convert the organic sample into CO2 and H2O and a Cavity Ring-Down Spectrometer (CRDS) that analyzes the combustion species inside an optical cavity based on the molecular absorption of individual isotopomers. The CRDS uses dual lasers to target the four isotpomers of interest: 12CO2, 13CO2, H2O and HDO. The system delivers a typical precision of 0.1permil for δ13C and 1.5 permil for δD that parallels that achieved by IRMS, but with an unprecedented simplicity that allows scientists to leverage the science and map out the provenance of the analyzed

  6. Secular trends in age at menarche among Chinese girls from 24 ethnic minorities, 1985 to 2010.

    Science.gov (United States)

    Song, Yi; Ma, Jun; Agardh, Anette; Lau, Patrick W C; Hu, Peijin; Zhang, Bing

    2015-01-01

    Declining age at menarche has been observed in many countries. In China, a decrease of 4.5 months per decade in the average age at menarche among the majority Han girls has recently been reported. However, the trends in age at menarche among ethnic minority girls over the past 25 years remain unknown. To compare the differences in median age at menarche among girls aged 9-18 years across 24 ethnic minorities in 2010 and to estimate the trends in age at menarche in different ethnic minorities from 1985 to 2010. We used data from six cross-sectional Chinese National Surveys on Students' Constitution and Health (1985, 1991, 1995, 2000, 2005, and 2010). The median age at menarche was estimated by using probit analysis. In 2010, the ethnic minorities with the earliest age at menarche were the Koreans (11.79 years), Mongolians (12.44 years), and Zhuang (12.52 years). The three ethnic minorities with the latest age at menarche were the Sala (14.32 years), Yi (13.74 years), and Uighurs (13.67 years). From 1985 to 2010, the age at menarche declined in all 24 minority groups. The Lisu, Kazakh, and Korean minorities showed the largest reductions in age at menarche by 1.79 (pminorities showed the smallest reductions, with age at menarche declining by only 0.06 (p>0.05), 0.15 (p>0.05), and 0.15 (p>0.05) years, respectively, in the same period. A large variation in age at menarche was observed among different ethnic minorities, with the earliest age at menarche found among Korean girls. A reduction in the average age at menarche appeared among most of the ethnic minorities over time, and the largest decrease was observed in Lisu, Kazakh, and Korean girls. Thus, health education should focus on targeting the specific needs of each ethnic minority group.

  7. Integration of Geospatial Technologies into K-12 Curriculum: An Investigation of Teacher and Student Perceptions and Student Academic Achievement

    Science.gov (United States)

    Goldstein, Donna L.

    2010-01-01

    The purpose of this study was to explore outcomes of a GIS/GPS integration process: to (a) examine student responses to GIS and GPS inclusion in their curriculum, (b) determine whether a relationship exists between inclusion of GIS into existing K-12 curriculum and student achievement, (c) examine the effectiveness of GIS professional development…

  8. Integrating local environmental research into K-12 science classrooms and the value of graduate student-educator partnerships

    Science.gov (United States)

    Ward, N. D.; Petrik-Finley, R.

    2015-12-01

    Collaboration between researchers and K-12 educators enables an invaluable exchange of teaching philosophies and educational tools. Programs that partner graduate students with K-12 educators serve the dual purpose of training future educators and providing K-12 students with unique opportunities and perspectives. The benefits of this type of partnership include providing students with enhanced educational experiences and positive student-mentor relationships, training STEM graduate students in effective teaching strategies, and providing teachers with a firsthand resource for scientific information and novel educational materials. Many high school students have had little exposure to science beyond the classroom. Frequent interactions with "real-life" scientists can help make science more approachable and is an effective strategy for promoting science as a career. Here I describe my experiences and several lessons designed as a NSK GK-12 fellow. For example, a month-long unit on biogeochemical principles was framed as a crime scene investigation of a fish kill event in Hood Canal, Washington, in which students were given additional pieces of evidence to solve the mystery as they satisfied checkpoints in their understanding of key concepts. The evidence pieces included scientific plots, maps, datasets, and laboratory exercises. A clear benefit of this investigation-style unit is that students were able to learn the material at their individual pace. This structure allowed for a streamlined integration of differentiated materials such as simplified background readings or visual learning aids for struggling students or more detailed news articles and primary literature for more advanced students. Although the NSF GK-12 program has been archived, educators and researchers should pursue new partnerships, leveraging local and state-level STEM outreach programs with the goal of increasing national exposure of the societal benefits of such synergistic activities.

  9. Education of Social Skills among Senior High School Age Students in Physical Education Classes

    Science.gov (United States)

    Akelaitis, Arturas V.; Malinauskas, Romualdas K.

    2016-01-01

    Research aim was to reveal peculiarities of the education of social skills among senior high school age students in physical education classes. We hypothesized that after the end of the educational experiment the senior high school age students will have more developed social skills in physical education classes. Participants in the study were 51…

  10. In-season and out-of-season variation of rotavirus genotype distribution and age of infection across 12 European countries before the introduction of routine vaccination, 2007/08 to 2012/13

    DEFF Research Database (Denmark)

    Hungerford, Daniel; Vivancos, Roberto; Read, Jonathan M

    2016-01-01

    distribution and age distribution of rotavirus gastroenteritis (RVGE) cases in and out of peak season in 12 countries which were yet to implement routine rotavirus vaccination. In multinomial multivariate logistic regression, adjusting for year, country and age, the odds of infection caused by genotype...

  11. BMI, waist circumference at 8 and 12 years of age and FVC and FEV

    NARCIS (Netherlands)

    Bekkers, Marga B.; Wijga, Alet H.; Gehring, Ulrike; Koppelman, Gerard H.; de Jongste, Johan C.; Smit, Henriette A.; Brunekreef, Bert

    2015-01-01

    Background: In adults, overweight is associated with reduced lung function, in children evidence on this association is conflicting. We examined the association of body mass index (BMI) and waist circumference (WC) at age 12, and of persistently (at ages 8 and 12 years) high BMI and large WC, with

  12. Psychometric properties of the Social Skills Questionnaire: Portuguese adaptation of the student form (grades 7 to 12).

    Science.gov (United States)

    Mota, Catarina Pinheiro; Matos, Paula Mena; Lemos, Marina Serra

    2011-05-01

    The present study aims to analyze the psychometric properties of the student form (Grades 7 to 12) of the Social Skills Questionnaire authored by Gresham and Elliott (1990), on a sample of Portuguese adolescents. Participants included 573 students, both female and male, aged 14 to 19. Reliability was assessed through Cronbach's alpha and was .87 for the total scale, ranging from.58 to .72 for the subscales. A confirmatory factor analysis revealed that the main adjustment indices presented unexpected values. A principal components analysis indicated that several items of the cooperation subscale correlated with other factors. Adequate adjustment indices were found when cooperation was removed from the model. Semantic dualities due to cultural factors and difficulties assuming the cooperation dimension as an independent dimension might explain the results observed. The reorganization of the SSQ offers a reliable and valid instrument for research within the Portuguese population.

  13. Can children aged 12 years or more refuse life-saving treatment ...

    African Journals Online (AJOL)

    National Health Act[3] (section 6(1)(d)) and the common law. Constitutional ... the right to bodily and psychological integrity (section 12(2)) and the right to privacy ... development; (iii) any disability that the child may have; and (iv) any chronic ... healthcare provider in deciding whether a child of 12 years of age or more is 'of ...

  14. Validity and psychometric properties of the General Health Questionnaire-12 in young Australian adolescents.

    Science.gov (United States)

    Tait, Robert J; French, Davina J; Hulse, Gary K

    2003-06-01

    The General Health Questionnaire (GHQ) is a measure of current mental wellbeing that has been extensively validated with adults. The instrument has also been used with adolescents. (i) To assess the psychometric properties of the GHQ-12 among school students in grades 7-10; (ii) to validate it against other psychological tests; and (iii) to suggest a threshold score. The survey was conducted in single sex and mixed schools from the state and private system in Perth, Western Australia. The survey contained the GHQ-12 and measures of anxiety, depression, self-esteem, stress, generalized self-efficacy, social desirability and negative affectivity. There were 336 students (female 55%) with an age range of 11-15 years (median 13). The GHQ showed good internal consistency (alpha 0.88). Girls had higher mean GHQ-12 scores than boys (F (1,326) 15.0, p school grade (F (3,326) 4.2, p < 0.01). Multiple linear regression showed that depression, anxiety, self-esteem and stress were significant independent predictors of GHQ scores. The model accounted for 68% of the variance (adjusted R 2). Screening indices were calculated by comparison with a combined depression and/or anxiety category. Threshold scores of 13/14 for males and 18/19 for females appeared optimal. General Health Questionnaire scores were compared with two criterion groups: adolescents in hospital with alcohol or drug (AOD) related problems and those with problems not related to AOD use. Only the former group had significantly higher total scores. The GHQ-12 showed good structural characteristics and was appropriately correlated with other measures of related traits. Overall, the GHQ-12 appears to be a valid index of psychological wellbeing in this population and was considerably shorter than some of the other instruments.

  15. Association between parental motives for food choice and eating patterns of 12- to 13-year-old Norwegian children.

    Science.gov (United States)

    Oellingrath, Inger M; Hersleth, Margrethe; Svendsen, Martin V

    2013-11-01

    To determine (i) the importance of parents’ motives for everyday family food choices; and (ii) the relationship between parental food choice motives and eating patterns of 12- to 13-year-old children. Cross-sectional study. A modified version of the Food Choice Questionnaire was used to determine parental motives for food choices. The children’s food and drink intake was reported by their parents using a retrospective FFQ. Eating patterns were derived using principal component analysis. The association between food choice motives and eating patterns was examined using multiple linear regression analysis. Primary schools, Telemark County, Norway. In total, 1095 children aged 1213 years and their parents. The parental motive ‘sensory appeal’ was the most important for food choice, followed by ‘health’, ‘convenience’, ‘natural content’ and ‘weight control’. The food choice motives were associated with the eating patterns of the children, independent of background variables. The motive ‘health’ was most strongly associated with a ‘varied Norwegian’ eating pattern, representing a diverse diet and regular meals, while the motive ‘convenience’ appeared to be the most important barrier to this eating pattern. ‘Weight control’ was not associated with the ‘varied Norwegian’ eating pattern. To encourage parents to make healthy food choices for their children, health promotion activities should focus on the health benefits of a diverse diet and regular meals, rather than weight control. Recommended food products should be made more convenient and easily available for families with children.

  16. Phase equilibrium properties of binary aqueous solutions containing ethanediamine, 1,2-diaminopropane, 1,3-diaminopropane, or 1,4-diaminobutane at several temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Ahmed, Nouria Chiali-Baba [LATA2M, Laboratoire de Thermodynamique Appliquee et Modelisation Moleculaire, University AbouBekr Belkaid of Tlemcen, P.O. Box 119, Tlemcen 13000 (Algeria); Negadi, Latifa, E-mail: l_negadi@mail.univ-tlemcen.d [LATA2M, Laboratoire de Thermodynamique Appliquee et Modelisation Moleculaire, University AbouBekr Belkaid of Tlemcen, P.O. Box 119, Tlemcen 13000 (Algeria); Mokbel, Ilham; Jose, Jacques [LSA, Laboratoire des Sciences Analytiques, CNRS-UMR 5180, Universite Claude Bernard - Lyon I. 43, Bd du 11 Novembre 1918, Villeurbanne Cedex 69622 (France)

    2011-05-15

    Research highlights: Vapour pressures of ethanediamine (EDA), 1,2-diaminopropane, 1,3-diaminopropane (1,3-DAP), or 1,4-diaminobutane (1,4-DAB) aqueous solutions are reported between (293 and 363) K. The two first mixtures show negative azeotropic behaviour. The aqueous solutions of EDA, 1,2-DAP, or 1,3-DAP exhibit negative G{sup E} whereas the one containing 1,4-DAB shows either negative G{sup E} or sinusoidal shape for G{sup E}. - Abstract: The vapour pressures of {l_brace}ethanediamine (EDA) + water{r_brace}, {l_brace}1,2-diaminopropane (1,2-DAP) + water{r_brace}, {l_brace}1,3-diaminopropane (1,3-DAP) + water{r_brace} or {l_brace}1,4-diaminobutane (1,4-DAB) + water{r_brace} binary mixtures, and of pure EDA, 1,2-DAP, 1,3-DAP, 1,4-DAB, and water components were measured by means of two static devices at temperatures between (293 and 363) K. The data were correlated with the Antoine equation. From these data, the excess Gibbs function (G{sup E}) was calculated for several constant temperatures and fitted to a fourth-order Redlich-Kister equation using the Barker's method. The {l_brace}ethanediamine (EDA) + water{r_brace}, and {l_brace}1,2-diaminopropane (1,2-DAP) + water{r_brace} binary systems show negative azeotropic behaviour. The aqueous solutions of EDA, 1,2-DAP, or 1,3-DAP exhibit negative deviations in G{sup E} for all investigated temperatures over the whole composition range whereas the (1,4-DAB + water) binary mixture shows negative G{sup E} for temperatures (293.15 < T/K < 353.15) and a sinusoidal shape for G{sup E} at T = 363.15 K.

  17. Burnout syndrome among dental students: a short version of the "Burnout Clinical Subtype Questionnaire" adapted for students (BCSQ-12-SS

    Directory of Open Access Journals (Sweden)

    Montero-Marin Jesus

    2011-12-01

    Full Text Available Abstract Background Burnout has been traditionally defined in relation to the dimensions of "exhaustion", "cynicism", and "inefficiency". More recently, the Burnout Clinical Subtype Questionnaire (BCSQ-12 further established three different subtypes of burnout: the "frenetic" subtype (related to "overload", the "under-challenged" subtype (related to "lack of development", and the "worn-out" subtype (related to "neglect". However, to date, these definitions have not been applied to students. The aims of this research were (1 to adapt a Spanish version of the BCSQ-12 for use with students, (2 to test its factorial validity, internal consistency, convergent and discriminant validity, and (3 to assess potential socio-demographic and occupational risk factors associated with the development of the subtypes. Method We used a cross-sectional design on a sample of dental students (n = 314 from Santiago and Huesca universities (Spain. Participants completed the Burnout Clinical Subtype Questionnaire Student Survey (BCSQ-12-SS, the Maslach Burnout Inventory Student Survey (MBI-SS, and a series of socio-demographic and occupational questions formulated for the specific purpose of this study. Data were subjected to exploratory factor analysis (EFA using the principal component method with varimax orthogonal rotation. To assess the relations with the criterion, we calculated the Pearson correlation coefficient (r, multiple correlation coefficient (Ry.123, and the coefficient of determination (R2y.123. To assess the association between the subtypes and the socio-demographic variables, we examined the adjusted odds ratio (OR obtained from multivariate logistic regression models. Results Factorial analyses supported the theoretical proposition of the BCSQ-12-SS, with α-values exceeding 0.80 for all dimensions. The "overload-exhaustion" relation was r = 0.59 (p y.123 = 0.62, 30.25% in "cynicism" (Ry.123 = 0.55, and 26.01% in "inefficiency" (Ry.123 = 0

  18. Teacher-Evaluated Self-Regulation Is Related to School Achievement and Influenced by Parental Education in Schoolchildren Aged 8-12: A Case-Control Study.

    Science.gov (United States)

    van Tetering, Marleen A J; de Groot, Renate H M; Jolles, Jelle

    2018-01-01

    There are major inter-individual differences in the school achievements of students aged 8-12. The determinants of these differences are not known. This paper investigates two possible factors: the self-regulation of the student and the educational levels obtained by their parents. The study first investigates whether children with high and low academic achievement differ in their self-regulation. It then evaluates whether there are differences in the self-regulation of children with high and moderate-to-low level of parental education (LPE). The focus was on the self-regulation of students as judged by their teacher. Teacher evaluations were assessed using an observer questionnaire: the Amsterdam Executive Functioning Inventory. Results showed that students with low school achievement had substantially lower teacher-perceived self-regulation than children with high school achievement. Furthermore, teacher-perceived self-regulation was lower for children with moderate-to-low LPE than for children with high LPE. The findings suggest that interventions on the domain of self-regulation skills should be developed and used, particularly in students at risk of poor school achievement.

  19. 12 Merken, 13 Ongelukken

    NARCIS (Netherlands)

    Alsem, Karel Jan; Klein Koerkamp, Robbert

    2011-01-01

    Merken oefenen bewust en onbewust veel invloed op ons uit. Veel boeken beschrijven vooral succes stories van merken. Dit boek beschrijft van 12 merken de fouten die ze maakten in hun merk- en communicatiebeslissingen, zoals het op de markt brengen van merkextensies die ver af liggen van de

  20. Examining 12-14 Age Secondary School Students’ Tendency to Violence doing Active Sport or not

    Directory of Open Access Journals (Sweden)

    Pelin Aydın

    2015-04-01

    Full Text Available The aim of this study was to investigate secondary school students’ tendency to violence, doing active sport or not. The sampling group of the study was consisted of 101 girls and 99 boys in the total 200 secondary school students in Kütahya city center of whose ages differs between of 12-14. In the study tendency to violence scale, developed by Göka and colleagues, was used as data gathering tool. In the evaluation of the data SPSS package program for Windows was used and after reliability of the scale was assessed One Sample Kolmogorov-Smirnov test was applied for if the obtained data was showing normal distribution and also as hypotheses tests Independent Samples t Test was applied for pairwise comparisons and One Way ANOVA test was applied for triple or more comparisons. As a result of the study there were no significant differences between students’ tendency to violence according to their ages and sport participation situations, on the other hand there were significant differences according to their class and perceived success in class. This study showed that class and perceived success in class are predictors of tendency to violence.

  1. Experimental study of radiative pion capture on 13C, 20Ne, 90Zr, 19F and 12C

    International Nuclear Information System (INIS)

    Martoff, C.J.

    1980-11-01

    Photon spectra for 50 13 C, 19 F, 20 Ne, and 90 Zr. The e + e - pair spectrometer system used has resolution 850 keV fwhm and photon detection efficiency 5 x 10 -6 . The total radiative capture branching ratios measured are 13 C (1.66 +- 0.25)%, 19 F (2.40 +- 0.48)%, 20 Ne (1.60 +- 0.24)%, and 90 Zr (2.1 +- 0.5)%. The partial radiative capture branching ratios to four bound states and two resonances in 20 F, and two bound states and three resonances in 13 B have also been measured. The branching ratio for 13 C(π - ,γ) 13 B g.s. is (6.1 +- 1.2) x 10 -4 . Comparison of this result with the beta decay rate of 13 B shows that (84 +- 16)% of the pion capture amplitude is accounted for by the Gamow-Teller matrix element. Further analysis suggests that much of the remaining strength is E2. The measured branching ratios to resonant states in 13 C(π - ,γ) 13 B are shown to be in agreement with detailed shell model calculations. The total single-particle strength in these transitions is shown to be approximately half as large as that of the T = 3/2 part of the E1 photoresonance (the Giant Dipole Resonance) in 13 C. The branching ratio for 20 Ne(π - ,γ) 20 F (T = 1, J/sup π/ = 1 + , E/sub x/ = 1.06 MeV) is 0.91 +- 0.52).10 -4 . Comparison with the electroexcitation of the analog giant M1 state in 20 Ne (11.24 MeV) shows that the M1 transition amplitude is less than (46 +- 14)% Gamow-Teller. This result is in agreement with detailed shell model calculations of the M1 transition. The photon spectrum for radiative pion capture from flight (reaction 12 C(π + T = 44 MeV, γ at 90 0 )) has been measured. 13 figures, 12 tables

  2. 1.2 million kids and counting-Mobile science laboratories drive student interest in STEM.

    Science.gov (United States)

    Jones, Amanda L; Stapleton, Mary K

    2017-05-01

    In today's increasingly technological society, a workforce proficient in science, technology, engineering, and mathematics (STEM) skills is essential. Research has shown that active engagement by K-12 students in hands-on science activities that use authentic science tools promotes student learning and retention. Mobile laboratory programs provide this type of learning in schools and communities across the United States and internationally. Many programs are members of the Mobile Lab Coalition (MLC), a nonprofit organization of mobile and other laboratory-based education programs built on scientist and educator collaborations. A recent survey of the member programs revealed that they provide an impressive variety of programming and have collectively served over 1.2 million students across the US.

  3. Vitamin B12 absorption capacity in healthy children

    International Nuclear Information System (INIS)

    Hjelt, K.; Krasilnikoff, P.A.

    1986-01-01

    B12 absorption was investigated in 47 healthy children aged 7 months to 15.8 years (median 4.9 years). The patients had either recovered from giardiasis, the post-gastroenteritis syndrome, or had celiac disease in remission (treated with a gluten-free diet). The B12 absorption was measured by a double-isotope technique using 57 CoB12 and 51 CrCl 3 , the latter being the inabsorbable marker. The radiation dose was minimal. The results were presented as fractional absorption of B12 (FAB12). Within the different age groups, the absorption test was performed by means of the following oral amounts of B12: 0- less than 1 year, 0.5 microgram; 1-3 years: 1.7 micrograms, 4-6 years, 2.5 micrograms; 7-10 years; 3.3 micrograms; and 11-15 years, 4.5 micrograms. When using these oral amounts of B12, the medians (and ranges) of FAB12 were found to be: 1-3 years (n = 18), 37% (16-80%); 4-6 years (n = 10), 27% (19-40%); 7-10 years (n = 9), 32% (21-44%); and 11-15 years (n = 8), 27% (19-59%). The FAB12 in two children aged 7 and 11 months was 31% and 32%, respectively. These results may be interpretated as reference values for B12 absorption in children. Further absorption tests were performed in seven children representing the four age groups from 1 to 15 years. When a high oral amount of B12 was given (i.e., three times the saturation dose), the FAB12 ranged from 0 to 20% (median 9%), whereas a low amount (i.e., one-ninth of the saturation dose) produced fractional absorptions from 65 to 82% (median 74%)

  4. Vitamin B12 absorption capacity in healthy children

    Energy Technology Data Exchange (ETDEWEB)

    Hjelt, K.; Krasilnikoff, P.A.

    1986-03-01

    B12 absorption was investigated in 47 healthy children aged 7 months to 15.8 years (median 4.9 years). The patients had either recovered from giardiasis, the post-gastroenteritis syndrome, or had celiac disease in remission (treated with a gluten-free diet). The B12 absorption was measured by a double-isotope technique using /sup 57/CoB12 and /sup 51/CrCl/sub 3/, the latter being the inabsorbable marker. The radiation dose was minimal. The results were presented as fractional absorption of B12 (FAB12). Within the different age groups, the absorption test was performed by means of the following oral amounts of B12: 0- less than 1 year, 0.5 microgram; 1-3 years: 1.7 micrograms, 4-6 years, 2.5 micrograms; 7-10 years; 3.3 micrograms; and 11-15 years, 4.5 micrograms. When using these oral amounts of B12, the medians (and ranges) of FAB12 were found to be: 1-3 years (n = 18), 37% (16-80%); 4-6 years (n = 10), 27% (19-40%); 7-10 years (n = 9), 32% (21-44%); and 11-15 years (n = 8), 27% (19-59%). The FAB12 in two children aged 7 and 11 months was 31% and 32%, respectively. These results may be interpretated as reference values for B12 absorption in children. Further absorption tests were performed in seven children representing the four age groups from 1 to 15 years. When a high oral amount of B12 was given (i.e., three times the saturation dose), the FAB12 ranged from 0 to 20% (median 9%), whereas a low amount (i.e., one-ninth of the saturation dose) produced fractional absorptions from 65 to 82% (median 74%).

  5. K-12 Students' Perceptions of Scientists: Finding a valid measurement and exploring whether exposure to scientists makes an impact

    Science.gov (United States)

    Hillman, Susan J.; Bloodsworth, Kylie H.; Tilburg, Charles E.; Zeeman, Stephan I.; List, Henrietta E.

    2014-10-01

    This study was launched from a National Science Foundation GK-12 grant in which graduate fellows in Science, Technology, Engineering, and Mathematics (STEM) are placed in classrooms to engage K-12 students in STEM activities. The investigation explored whether the STEM Fellows' presence impacted the K-12 students' stereotypical image of a scientist. Since finding a valid instrument is critical, the study involved (1) determining the validity of the commonly administered Draw-A-Scientist Test (DAST) against a newly designed six-question survey and (2) using a combination of both instruments to determine what stereotypes are currently held by children. A pretest-posttest design was used on 485 students, grades 3-11, attending 6 different schools in suburban and rural Maine communities. A significant but low positive correlation was found between the DAST and the survey; therefore, it is imperative that the DAST not be used alone, but corroboration with interviews or survey questions should occur. Pretest results revealed that the children held common stereotypes of scientists, but these stereotypes were neither as extensive nor did they increase with the grade level as past research has indicated, suggesting that a shift has occurred with children having a broader concept of who a scientist can be. Finally, the presence of an STEM Fellow corresponded with decreased stereotypes in middle school and high school, but no change in elementary age children. More research is needed to determine whether this reflects resiliency in elementary children's perceptions or limitations in either drawing or in writing out their responses.

  6. CACA-TOCSY with alternate {sup 13}C-{sup 12}C labeling: a {sup 13}C{sup {alpha}} direct detection experiment for mainchain resonance assignment, dihedral angle information, and amino acid type identification

    Energy Technology Data Exchange (ETDEWEB)

    Takeuchi, Koh [National Institute of Advanced Industrial Science and Technology (AIST), Biomedicinal Information Research Center (BIRC) (Japan); Frueh, Dominique P.; Sun, Zhen-Yu J.; Hiller, Sebastian; Wagner, Gerhard, E-mail: gerhard_wagner@hms.harvard.ed [Harvard Medical School, Department of Biological Chemistry and Molecular Pharmacology (United States)

    2010-05-15

    We present a {sup 13}C direct detection CACA-TOCSY experiment for samples with alternate {sup 13}C-{sup 12}C labeling. It provides inter-residue correlations between {sup 13}C{sup {alpha}} resonances of residue i and adjacent C{sup {alpha}s} at positions i - 1 and i + 1. Furthermore, longer mixing times yield correlations to C{sup {alpha}} nuclei separated by more than one residue. The experiment also provides C{sup {alpha}}-to-side chain correlations, some amino acid type identifications and estimates for {psi} dihedral angles. The power of the experiment derives from the alternate {sup 13}C-{sup 12}C labeling with [1,3-{sup 13}C] glycerol or [2-{sup 13}C] glycerol, which allows utilizing the small scalar {sup 3}J{sub CC} couplings that are masked by strong {sup 1}J{sub CC} couplings in uniformly {sup 13}C labeled samples.

  7. To Evaluate the Relationship between Mandibular Canine Calcification Stages and Skeletal Age.

    Science.gov (United States)

    Malik, Pooja; Rana, Vivek; Rehani, Usha

    2012-01-01

    The purpose of this study was to assess skeletal age and establish relationship between mandibular canine calcification and skeletal age. The study included 147 females aged 10 to 13 years. The subjects were divided into three groups: Group I-comprising of 10 to 11 years old female; Group II-comprising of 11 to 12 years old female; Group III-12 to 13 years female. OPG and hand and wrist radiographs of left side for each subject were taken with prior consent of their parents. The calcification status of canine was evaluated from orthopantomograms according to scores given in Demirjian's method. The stages of ossification of various carpal bones were evaluated using radiographic atlas of Greulich-Pyle and skeletal age was calculated. Data collected was statistically analyzed. The results drawn from this study showed that a strong correlation was observed for canine calcification stage F for 10 to 11 years and for stage G in 11 to 12 years and 12 to 13 years respectively. How to cite this article: Malik P, Rana V, Rehani U. To Evaluate the Relationship between Mandibular Canine Calcification Stages and Skeletal Age. Int J Clin Pediatr Dent 2012;5(1): 14-19.

  8. Needle-Age Related Variability in Nitrogen, Mobile Carbohydrates, and δ13C within Pinus koraiensis Tree Crowns

    Science.gov (United States)

    Yan, Cai-Feng; Han, Shi-Jie; Zhou, Yu-Mei; Wang, Cun-Guo; Dai, Guan-Hua; Xiao, Wen-Fa; Li, Mai-He

    2012-01-01

    For both ecologists and physiologists, foliar physioecology as a function of spatially and temporally variable environmental factors such as sunlight exposure within a tree crown is important for understanding whole tree physiology and for predicting ecosystem carbon balance and productivity. Hence, we studied concentrations of nitrogen (N), non-structural carbohydrates (NSC = soluble sugars + starch), and δ13C in different-aged needles within Pinus koraiensis tree crowns, to understand the needle age- and crown position-related physiology, in order to test the hypothesis that concentrations of N, NSC, and δ13C are needle-age and crown position dependent (more light, more photosynthesis affecting N, NSC, and δ13C), and to develop an accurate sampling strategy. The present study indicated that the 1-yr-old needles had significantly higher concentration levels of mobile carbohydrates (both on a mass and an area basis) and Narea (on an area basis), as well as NSC-N ratios, but significantly lower levels of Nmass (on a mass basis) concentration and specific leaf area (SLA), compared to the current-year needles. Azimuthal (south-facing vs. north-facing crown side) effects were found to be significant on starch [both on a mass (STmass) and an area basis (STarea)], δ13C values, and Narea, with higher levels in needles on the S-facing crown side than the N-facing crown side. Needle Nmass concentrations significantly decreased but needle STmass, STarea, and δ13C values significantly increased with increasing vertical crown levels. Our results suggest that the sun-exposed crown position related to photosynthetic activity and water availability affects starch accumulation and carbon isotope discrimination. Needle age associated with physiological activity plays an important role in determining carbon and nitrogen physiology. The present study indicates that across-scale sampling needs to carefully select tissue samples with equal age from a comparable crown position

  9. Summer Students

    CERN Multimedia

    2005-01-01

    SUMMER STUDENT LECTURE PROGRAMME Main Auditorium, bldg. 500 DATE TIME LECTURER TITLE Wednesday 6 July 09:15 - 10:00 F. CERUTTI (CERN) Presentation of the Summer Student Programme D. Heagerty (CERN) Computer rules O. ULLALAND (CERN) Workshops presentation 10:15 - 11:00 D. SCHLATTER (CERN) Introduction to CERN 11:15 Film on CERN Thursday 7 July 09:15 - 11:00 L. Di Lella (CERN) Introduction to Particle Physics (1-2/4) 11:15 - 12:00 P. Chomaz (GANIL / CERN) Introduction to Nuclear Physics (1/3) 12:00 Discussion Session 14:00 - 14:45 M. Lindroos (CERN) ISOLDE Facility 15:00 M. Lindroos (CERN) ISOLDE Visit Friday 8 July 09:15 - 10:00 L. Di Lella (CERN) Introduction to Particle Physics (3/4) 10:15 - 11:00 P. Chomaz (GANIL / CERN) Introduction to Nuclear Physics (2/3) 11:15 - 12:00 G. ROLANDI (CERN) How an experiment is designed (1/2) 12:00 Discussion Session Monday 11 July 09:15 - 10:00 L. Di Lella (CERN) Introduction to Particle Physi...

  10. Short Sleep Duration Among Middle School and High School Students - United States, 2015.

    Science.gov (United States)

    Wheaton, Anne G; Jones, Sherry Everett; Cooper, Adina C; Croft, Janet B

    2018-01-26

    Insufficient sleep among children and adolescents is associated with increased risk for obesity, diabetes, injuries, poor mental health, attention and behavior problems, and poor academic performance (1-4). The American Academy of Sleep Medicine has recommended that, for optimal health, children aged 6-12 years should regularly sleep 9-12 hours per 24 hours and teens aged 13-18 years should sleep 8-10 hours per 24 hours (1). CDC analyzed data from the 2015 national, state, and large urban school district Youth Risk Behavior Surveys (YRBSs) to determine the prevalence of short sleep duration (school nights among middle school and high school students in the United States. In nine states that conducted the middle school YRBS and included a question about sleep duration in their questionnaire, the prevalence of short sleep duration among middle school students was 57.8%, with state-level estimates ranging from 50.2% (New Mexico) to 64.7% (Kentucky). The prevalence of short sleep duration among high school students in the national YRBS was 72.7%. State-level estimates of short sleep duration for the 30 states that conducted the high school YRBS and included a question about sleep duration in their questionnaire ranged from 61.8% (South Dakota) to 82.5% (West Virginia). The large percentage of middle school and high school students who do not get enough sleep on school nights suggests a need for promoting sleep health in schools and at home and delaying school start times to permit students adequate time for sleep.

  11. Retinal nerve fiber layer thickness measured by optical coherence tomography in Chinese teenagers aged from 13 years old to 18 years old

    Directory of Open Access Journals (Sweden)

    Yu-Ming Zhang

    2014-04-01

    Full Text Available AIM: To establish a reference range of retinal nerve fiber layer(RNFLthickness by optical coherence tomography(OCTin Chinese teenagers aged from 13 to 18 years old, and investigate its relationship with age, eye side, gender, and ethnic group.METHODS: A total of 402 eyes from 201 normal Chinese aged from 13 to 18 years old were recruited for this study. Optic disk with 3.4mm diameter circle in different global average, quadrant and part-time bit retinal nerve fiber layer thickness(RNFLTwas measured by RNFL thickness average analysis program. Their RNFLT at different part-time bit, quadrant and global average RNFLT around the disc were measured by OCT with 3.4mm diameter circle, using the RNFL thickness average analysis program. The data was analyzed with SPSS statistical 19.0. The influences of several factors(such as age, eye side, gender, and ethnic groupon RNFLT were also analyzed.RESULTS: The global average RNFLT at 13, 14, 15, 16, 17, 18 years old was 108.32±9.42μm, 109.23±9.67μm, 110.36±11.14μm, 111.27±10.21μm, 109.23±9.67μm, 112.11±8.83μm respectively. RNFLT of right eyes was 109.82±8.93μm and of left eyes was 110.33±9.89μm. All of the male's average RNFLT was 110.14±10.02μm, and all of the female's average RNFLT was 109.96±11.22μm. The average RNFLT of Han nationality was 110.22±9.31μm and of non-Han nationality was 109.87±8.65μm. The average RNFLT of all was 110.02±9.87μm, the RNFLT at the superior, nasal, inferior and temporal quadrant was 146.56 ±18.88μm, 76.49±13.28μm, 136.64±16.29μm, 82.01±12.55μm respectively. There was no significant difference in gender, eye side, and ethnic group(all PCONCLUSION: This study has established a normal standard reference of RNFLT and its related indexes by OCT in Chinese teenagers aged 13-18 years old. Gender, age, eye side, and ethnic group have no effect on their RNFLT, which has significant difference with adult's data. And for the diagnosis and follow-up of

  12. Students Perceptions on the quality of clinical supervision among the 12 affiliated hospital of Medical Faculty of UNISSULA

    Directory of Open Access Journals (Sweden)

    Dian Apriliana Rahmawatie

    2011-12-01

    Design and Methods: This study involved 181 students of clinical internship of the year 2003, 2004 and 2005 of medical faculty of Islamic Sultan Agung University having the clinical rotation at the stage of surgery, obsgyn, pediatrics, internal medicine, ENT, neurology, dermatology and venerology, psychiatry, across the affiliated hospitals. The subject were divided into groups based on the hospital they were placed. Clinical Teaching Effectiveness Instrument (CTEI adapted in bahasa Indonesia was used. The Descriptive and Kruskal-Wallis test were applied for the data analysis. Results: Means of the effectiveness of clinical supervision for 12 affiliated hospitals ranged from 3.25 to 4.02. Kruskal-Wallis test resulted in the value of Chi-S=13.32 and p=0.27. Conclusion: Over all the clinical supervision for the 12 affiliated hospitals is perceived good and shows no significant difference. However the practice of clinical supervision varies among the hospitals (Sains Medika, 3(2:135-149.

  13. 12 CFR 13.1 - Scope.

    Science.gov (United States)

    2010-01-01

    ... COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY GOVERNMENT SECURITIES SALES PRACTICES § 13.1 Scope. This part applies to national banks that have filed notice as, or are required to file notice as.... 78o-5) and Department of the Treasury rules under section 15C (17 CFR 400.1(d) and part 401). ...

  14. Nuclear critical opalescence and the M1 form factors of 12C and 13C

    International Nuclear Information System (INIS)

    Delorme, J.; Figureau, A.; Guichon, P.

    1981-01-01

    It is shown that core polarization by the nuclear pion field has opposite effects on the M1 form factors of 12 C(15.11 MeV) and 13 C(g.s.). New data on 13 C are found to agree with this prediction and a common interpretation of the experiments is shown to be possible for the two nuclei in terms of critical opalescence. Discrimination from alternative explanations of the observed anomalies should await further experiments, especially photopion reactions. (orig.)

  15. C-12/C-13 isotope ratio of the interstellar medium in the neighborhood of the sun

    International Nuclear Information System (INIS)

    Hawkins, I.; Jura, M.

    1987-01-01

    Data from observations of Xi Per, P Cyg, 20 Tau, and 23 Tau, obtained at 4232 and 3957 A using a coude spectrograph and a 1872-element reticon on the 3-m Shane telescope at Lick Observatory during 1984-1985, are combined with data on Zeta Oph (Hawkins et al., 1985) and used to estimate the C isotope ratio of the ISM near the sun. The results are presented in extensive tables and graphs and characterized in detail. The (C-12)H(+)/(C-13)H(+) abundance ratios toward the five stars are found to agree to within 12 percent and shown to be representative of the C-12/C-13 ratios in the gas, strongly indicating that the local ISM is homogeneous. The difference between the ISM ratio (43 + or - 4) and the solar-system value (89) is attributed to the chemical evolution of the ISM in the 4.9 Gyr since the formation of the sun. 78 references

  16. Neutron yield of thick {sup 12}C and {sup 13}C targets with 20 and 30 MeV deuterons

    Energy Technology Data Exchange (ETDEWEB)

    Lhersonneau, G.; Fadil, M. [GANIL, Caen (France); Malkiewicz, T. [CSC - IT Center for Science Ltd., Espoo (Finland); Gorelov, D.; Sorri, J.; Trzaska, W.H. [University of Jyvaskyla, Department of Physics, Jyvaskyla (Finland); Jones, P.; Ngcobo, P.Z. [iThemba Laboratory for Accelerator Based Science, Western Cape (South Africa)

    2016-12-15

    The neutron yield of thick targets of carbon, natural and enriched in {sup 13}C, bombarded by deuterons of 20 and 30 MeV has been measured by the activation method. The gain with respect to a {sup 12}C target is the same as with protons beams. The yield ratio is about 1.2 only and hardly can justify the use of a {sup 13}C target with deuteron beams. The data, apart from being of interest for the design of facilities where secondary neutron beams are used, provide a test case for calculations where both beam and target have a weakly bound neutron. The MCNPx code version 2.6.0, despite failing to reproduce some details of the experimental distributions, describes their global properties fairly well, especially the relative yields of the {sup 12}C and {sup 13}C targets. (orig.)

  17. Parenting clinically anxious versus healthy control children aged 4-12 years.

    Science.gov (United States)

    van der Sluis, C M; van Steensel, F J A; Bögels, S M

    2015-05-01

    This study investigated whether parenting behaviors differed between parents of 68 clinically anxious children and 106 healthy control children aged 4-12 years. The effects of parent gender, child gender and child age on parenting were explored. Mothers and fathers completed a questionnaire to assess parenting behaviors in for children hypothetically anxious situations. Results showed that parents of clinically anxious children reported more anxiety-enhancing parenting (reinforcement of dependency and punishment) as well as more positive parenting (positive reinforcement). For the clinical sample, fathers reported using more modeling/reassurance than mothers, and parents reported using more force with their 4-7-year-olds than with their 8-12-year-olds. No interaction effects were found for child gender with child anxiety status on parenting. Results indicate that for intervention, it is important to measure parenting behaviors, and to take into account father and mother differences and the age of the child. Copyright © 2015 Elsevier Ltd. All rights reserved.

  18. Leisure Time Physical Inactivity and Sedentary Behaviour and Lifestyle Correlates among Students Aged 13-15 in the Association of Southeast Asian Nations (ASEAN) Member States, 2007-2013.

    Science.gov (United States)

    Peltzer, Karl; Pengpid, Supa

    2016-02-15

    The aim of this study was to examine the relationship between self-reported leisure time physical inactivity frequency and sedentary behaviour and lifestyle correlates among school children in the Association of Southeast Asian Nations (ASEAN) region. The analysis included 30,284 school children aged 13-15 years from seven ASEAN countries that participated in the Global School-based Student Health Survey (GSHS) between 2007 and 2013. The measure asked about overall physical activity, walking or biking to school, and on time spent sitting. Overall, the prevalence of physical inactivity was 80.4%, ranging from 74.8% in Myanmar to 90.7% in Cambodia and sedentary behaviour 33.0%, ranging from 10.5% in Cambodia and Myanmar to 42.7% in Malaysia. In multivariate logistic regression, not walking or biking to school, not attending physical education classes, inadequate vegetable consumption and lack of protective factors (peer and parental or guardian support) were associated with physical inactivity, and older age (14 and 15 years old), coming from an upper middle income country, being overweight or obese, attending physical education classes, alcohol use, loneliness, peer support and lack of parental or guardian supervision were associated with sedentary behaviour. In boys, lower socioeconomic status (in the form of having experienced hunger) and coming from a low income or lower middle income country were additionally associated with physical inactivity, and in girls, higher socioeconomic status, not walking or biking to school and being bullied were additionally associated with sedentary behaviour. In conclusion, a very high prevalence of leisure physical inactivity and sedentary behaviour among school going adolescents in ASEAN was found and several factors identified that may inform physical activity promotion programmes in school-going adolescents in ASEAN.

  19. [Study on feeding behavior in school children aged 11-13 years from Barcelona].

    Science.gov (United States)

    Castells Cuixart, M; Capdevila Prim, C; Girbau Solà, T; Rodríguez Caba, C

    2006-01-01

    To know the family environment, living habits and social characteristics in 11-13 years-old school children. A descriptive transversal study performed in 65 schools of Barcelona during the second three-month, involving 2354 school children aged 11-13 interviewed by 73 pharmacists. The questionnaire has thirty-nine questions referring to family structure, eating and drinking habits, preferences, life style parameters such as physical activity and television viewing. The survey revealed a family unit of two children and their parents was the most common. Only a 12% of the children surveyed lived with their grandparents. Furthermore, the findings revealed a low family presence during the three main meals on the working days, which increased on weekends, 26% on breakfast, 44% on lunch and 11% on dinner. A 24% had breakfast alone and the 46% ate what they wanted. About the afternoon snack, the 25% alone and the 55% what they wanted. A 60% never or practically never participated in decision making, when buying food. A 70% reported they did other activities while eating. Concretely, a 40, 39 and 59% of the children reported they had breakfast, lunch and dinner while watching television. The consumption frequency of trinkets, soft drinks and television viewing were lower for the children from private compared to public schools. This study show that food choice at shopping was mainly done by the parents, however, children had an important role in making decisions of what food they eat and the activities they do while eating. Therefore, pharmacists could have a potential role to intervene in the nutritional education to parents and children.

  20. Effect of short-term research training programs on medical students' attitudes toward aging.

    Science.gov (United States)

    Jeste, Dilip V; Avanzino, Julie; Depp, Colin A; Gawronska, Maja; Tu, Xin; Sewell, Daniel D; Huege, Steven F

    2018-01-01

    Strategies to build a larger workforce of physicians dedicated to research on aging are needed. One method to address this shortage of physician scientists in geriatrics is short-term training in aging research for early-stage medical students. The authors examined the effects of two summer research training programs, funded by the National Institutes of Health, on medical students' attitudes toward aging, using the Carolina Opinions on Care of Older Adults (COCOA). The programs combined mentored research, didactics, and some clinical exposure. In a sample of 134 participants, COCOA scores improved significantly after completion of the research training program. There was a significant interaction of gender, such that female students had higher baseline scores than males, but this gender difference in COCOA scores was attenuated following the program. Four of the six COCOA subscales showed significant improvement from baseline: early interest in geriatrics, empathy/compassion, attitudes toward geriatrics careers, and ageism.

  1. Attitude toward Christianity and paranormal belief among 13- to 16-yr.-old students.

    Science.gov (United States)

    Williams, Emyr; Francis, Leslie J; Robbins, Mandy

    2006-08-01

    A small but statistically significant positive correlation (r = .17) was found in a sample of 279 13- to 16-yr.-old students in Wales between scores on the Francis Scale of Attitude toward Christianity and on a new Index of Paranormal Belief. These data suggest that there is little common variance between attitude toward Christianity and belief in the paranormal.

  2. A Self-Instructional Course in Student Financial Aid Administration. Module 13: Verification. Second Edition.

    Science.gov (United States)

    Washington Consulting Group, Inc., Washington, DC.

    Module 13 of the 17-module self-instructional course on student financial aid administration (designed for novice financial aid administrators and other institutional personnel) focuses on the verification procedure for checking the accuracy of applicant data used in making financial aid awards. The full course provides an introduction to the…

  3. Impact of exposure to conflict, tsunami and mental disorders on school absenteeism: findings from a national sample of Sri Lankan children aged 12-17 years.

    Science.gov (United States)

    Siriwardhana, Chesmal; Pannala, Gayani; Siribaddana, Sisira; Sumathipala, Athula; Stewart, Robert

    2013-06-08

    Armed conflicts and natural disasters are common. Millions of people, including children are killed, injured, disabled and displaced as a result. The effects of conflict and natural disaster on mental health, especially of children are well established but effects on education have received less attention. This study investigated associations between conflict and/or tsunami exposure in Sri Lanka and their associations with absenteeism in a national sample of school children. A cross-sectional survey was conducted in 2006-7 among 1,505 randomly selected school children aged 12-17 years attending government schools in 17 districts. The hypotheses were that absenteeism would be more common in children previously affected by conflict or the 2004 tsunami and that at least part of this effect would be accounted for by mental disorders. Survey information included socio-demographic, conflict and tsunami exposure, mental health status (Strengths and Difficulties Questionnaire) and information on absenteeism (defined as 20% or greater non-attendance over one year). The total sample of consisted of 1,505 students aged 12-17 years with a mean age of 13.7 years. 120 children reported at least one conflict exposure and 65 reported at least one tsunami exposure while only 15 reported exposure to both conflict and tsunami. Prevalence of emotional disorder caseness was 2.7%, conduct disorder caseness 5.8%, hyperactivity disorder caseness 0.6%, and 8.5% were identified as having any psychiatric disorder. Absenteeism was present in 26.8%. Overall, previous exposure to tsunami (OR 2.29 95% CI 1.36-3.84) was significantly associated with absenteeism whereas exposure to conflict was not (OR 1.32 95% CI 0.88-1.97), although some specific conflict-related exposures were significant risk factors. Mental disorder was strongly associated with absenteeism but did not account for its association with tsunami or conflict exposure. Exposure to traumatic events may have a detrimental effect on

  4. Age of onset, nutritional determinants, and seasonal variations in menarche in rural Bangladesh.

    Science.gov (United States)

    Rah, Jee H; Shamim, Abu Ahmed; Arju, Ummeh T; Labrique, Alain B; Rashid, Mahbubur; Christian, Parul

    2009-12-01

    Menarche is an important milestone in the development of female adolescents. The study assessed the age at menarche using recall, its seasonality, and association with marital and nutritional status (using mid-upper arm circumference [MUAC]) among 3,923 female adolescents aged 12-19 years in a rural area of Bangladesh. At the time of assessment, most (88%) adolescents had attained menarche at the mean (standard deviation [SD]) age of 12.8 (1.4) years. Age of onset of menarche among married adolescents (13%) occurred earlier than in those who were unmarried (12.6 +/- 1.3 years vs 12.9 +/- 1.4 years, p < 0.01). Age at menarche was negatively associated with MUAC after adjusting for age and marital status (beta = -0.10, p < 0.01). More than 50% of the adolescents had an onset of menarche during winter (chi2 = 634.97; p < 0.001), with peaks in December and January. In this rural population, the current age at menarche was found to be slightly lower than the previous estimates of 13.0 years in Bangladesh. An early onset of menarche was associated with season and better nutritional status of the female adolescents and may be associated with early marriage.

  5. Identification of diacylglycerol and triacylglycerol containing 11,12,13-trihydroxy-9,14-octadecadienoic acid in castor oil.

    Science.gov (United States)

    Lin, Jiann-Tsyh; Chen, Grace Q

    2011-02-28

    Castor oil has many industrial uses. Molecular species of acylglycerols containing monohydroxy, dihydroxy and trihydroxy fatty acids in castor oil have been reported. We report here the identification of acylglycerols containing a triOH18:2 fatty acid in castor oil. The structure of this novel fatty acid was proposed as 11,12,13-trihydroxy-9,14-octadecadienoic acid by the mass spectrometry of the lithiated adducts of acylglycerols in the HPLC fractions of castor oil. The fragmentation pathways of the lithiated adduct of 11,12,13-trihydroxy-9,14-octadecadienoic acid were proposed. We also proposed the biosynthetic pathways of polyhydroxy fatty acids in castor. Published by Elsevier B.V.

  6. Cyberstalking and College-Age Students: A Bibliometric Analysis across Scholarly Databases

    Science.gov (United States)

    Piotrowski, Chris; Lathrop, Peter J.

    2012-01-01

    Research on the topic of cyberbullying has proliferated over the past decade, particularly on its impact on school-aged children (see Piotrowski, 2011). However, there is limited research on the incidence and impact of cyberstalking, a related type of cyber-abuse, on college-age students. Thus, it would be of interest to examine the extent of…

  7. Beliefs in the paranormal: age and sex differences among elderly persons and undergraduate students.

    Science.gov (United States)

    Vitulli, W F; Tipton, S M; Rowe, J L

    1999-12-01

    Beliefs in the paranormal were rated stronger in younger as compared to elderly adults by Emmons and Sobal in 1981, and sex correlates of paranormal beliefs appeared to be stronger in women than in men by Irwin in 1994. This research studied possible linkages between age and sex with a comparative analysis between results of Vitulli and Luper's 1998 survey among undergraduate students and data from elderly men (M = 72 yr., SD = 9.2, n = 21) and women (M = 69.3 yr., SD = 7.7, n = 55). Crawford and Christensen's 1995 12-item Extrasensory Perception Survey was administered to elderly persons living in apartment complexes and private homes, participating in activities in a recreation center, or attending a continuing-education seminar. A 2 x 2 multivariate analysis of variance from responses on the 12-item survey showed that undergraduate men and elderly women had the highest ratings on paranormal beliefs. The self-selecting characteristics of a segment of the elderly sample led to a post hoc univariate analysis of variance by partitioning that sample into those who were attending a continuing-education seminar versus all other elderly persons. Summated ratings (total scores) for this survey showed main effects for these subsamples and for sex. Sex and age differences were discussed in the context of the hypothesis of social marginality.

  8. The prevalence of Non-suicidal Self-Injury (NSSI) among high school students in relation to age and sex.

    Science.gov (United States)

    Kądziela-Olech, Halina; Zak, Gabriel; Kalinowska, Barbara; Wągrocka, Anna; Perestret, Grzegorz; Bielawski, Michał

    2015-01-01

    The undertaken research aimed at determining the frequency of deliberate self-injurious behaviour (D-SIB) among the students of secondary schools and also the analysis of the frequency of repeated Non-Suicidal Self-Injury (NSSI) occurrences in accordance with DSM-5 criteria in reference to the age and sex in the studied population. The data was collected via survey method according to the questionnaire prepared in compliance with the criteria DSM-5 and Self-Harm Inventory. The study included randomly selected students: 1193 boys and 1027 girls in Bialystok aged 12 and 19 (average age ± SD:16.8 ± 1.65). Statistical analysis of the data was carried out using the application Statistica 10.0 PL, StatSoft. These results indicate that D-SIB and NSSI affect both sexes. In the studied group 8.3 % of students engage in deliberate self-injurious behaviour. The percentage of NSSI was 4.8% (6.3% in the group of boys, 3.2 % among girls; p(Chi2)=0.01). Self-cutting was most common among 15-year-old pupils ((D-SIB:14.75%; NNSI:8.1%). The majority of respondents (82% of girls and 74% of boys) revealed that as a result of self-injury behaviour they experience relief. Conducting further research in the area of NSSI seems to be crucial due to chronicity and prevalence as well as the fact that numerous repeated self-injuries bringing relief or causing positive state of mind might indicate a mechanism similar to an addiction syndrome in adolescence.

  9. The description and symbolic value of the unicorn in French literature of the 12th and 13th centuries

    Directory of Open Access Journals (Sweden)

    Marija Panić

    2016-02-01

    Full Text Available The paper considers naturalist and symbolic traits attributed to the unicorn in French 12th and 13th century literature. The corpus encompasses the bestiaries comprised by Philippe de Thaon, Gervaise, Guillaume de Normandy, Pierre de Beauvais, Richard de Fournival and pseudo-Pierre de Beauveis, which belong to the tradition of the Physiologoi, as well as other encyclopedic and other works which contain the bookish zoological and geographic knowledge of the middle ages: Mappemonde by Pierre de Beauvais, The letter of presbyter John, and the Mappemonde by Gossouin de Metz. In this corpus where the description of the animals comes mainly from the same written sources (from antiquity and late antiquity and the Bible, we consider how this nonexistent animal is described and to what extent a symbolic interpretation is present.

  10. Curiosity killed the cat: no evidence of an association between cat ownership and psychotic symptoms at ages 13 and 18 years in a UK general population cohort.

    Science.gov (United States)

    Solmi, F; Hayes, J F; Lewis, G; Kirkbride, J B

    2017-07-01

    Congenital or early life infection with Toxoplasma gondii has been implicated in schizophrenia aetiology. Childhood cat ownership has been hypothesized as an intermediary marker of T. gondii infection and, by proxy, as a risk factor for later psychosis. Evidence supporting this hypothesis is, however, limited. We used birth cohort data from the Avon Longitudinal Study of Parents and Children (ALSPAC) to investigate whether cat ownership in pregnancy and childhood (ages 4 and 10 years) was associated with psychotic experiences (PEs) in early (age 13, N = 6705) and late (age 18, N = 4676) adolescence, rated from semi-structured interviews. We used logistic regression to examine associations between cat ownership and PEs, adjusting for several sociodemographic and socioeconomic factors, household characteristics and dog ownership. Missing data were handled via multiple imputation. Cat ownership during pregnancy was not associated with PEs at age 13 years [adjusted odds ratio (OR) 1.15, 95% confidence interval (CI) 0.97-1.35] or 18 years (OR 1.08, 95% CI 0.86-1.35). Initial univariable evidence that cat ownership at ages 4 and 10 years was associated with PEs at age 13 years did not persist after multivariable adjustment (4 years: OR 1.18, 95% CI 0.94-1.48; 10 years: OR 1.12, 95% CI 0.92-1.36). There was no evidence that childhood cat ownership was associated with PEs at age 18 years. While pregnant women should continue to avoid handling soiled cat litter, given possible T. gondii exposure, our study strongly indicates that cat ownership in pregnancy or early childhood does not confer an increased risk of later adolescent PEs.

  11. Experiencing aging or demystifying myths? - impact of different "geriatrics and gerontology" teaching strategies in first year medical students.

    Science.gov (United States)

    Lucchetti, Alessandra Lamas Granero; Lucchetti, Giancarlo; de Oliveira, Isabella Noceli; Moreira-Almeida, Alexander; da Silva Ezequiel, Oscarina

    2017-02-08

    With the aging of the population comes a greater need for geriatric and gerontology teaching. However, there is currently a dearth of investigations on the impact of different educational methodologies for teaching in this area early in medical courses. The present study aims to determine the impact of two educational strategies on the topic "Geriatrics and Gerontology" ("experiencing aging" and "myths of aging") as compared to a control group (no intervention) on the attitudes, empathy and knowledge of first year medical students. An intervention-based study in education was conducted at the beginning of the first year of a medical course. Students submitted to educational strategies were compared against students with no intervention. The two strategies were: "Experiencing Aging" - also known as the "aging game" (simulation of the disabilities and physiological changes of aging), and "Myths of Aging" - a knowledge discussion based on a "quiz show", questioning common myths about aging. All students were assessed on their attitudes towards older persons (Maxwell-Sullivan, UCLA attitudes), empathy (Maxwell-Sullivan), knowledge on facts and positive view about aging (Palmore), and cognitive knowledge. Data were analysed using Student's t, Chi-squared or ANOVA tests. A total of 230 students were assessed. The "experiencing aging" intervention was associated with improvement in empathy but worsening of attitude. The "myths of aging" intervention was associated with an improved attitude overall and positive view about aging but with no change in empathy towards older persons. Educational strategies can influence the attitudes and empathy of students, leading to different outcomes. These data highlight the importance of assessing the outcomes of educational strategies in medical teaching to ascertain in what manner (how), situations (when) and settings (where) these activities should be introduced.

  12. Relative Age Effect in Physical Fitness Among Elementary and Junior High School Students.

    Science.gov (United States)

    Nakata, Hiroki; Akido, Miki; Naruse, Kumi; Fujiwara, Motoko

    2017-10-01

    The present study investigated characteristics of the relative age effect (RAE) among a general sample of Japanese elementary and junior high school students. Japan applies a unique annual age-grouping by birthdates between April 1 and March 31 of the following year for sport and education. Anthropometric and physical fitness data were obtained from 3,610 Japanese students, including height, weight, the 50-m sprint, standing long jump, grip strength, bent-leg sit-ups, sit and reach, side steps, 20-m shuttle run, and ball throw. We examined RAE-related differences in these data using a one-way analysis of variance by comparing students with birthdates in the first (April-September) versus second (October-March of the following year) semesters. We observed a significant RAE for boys aged 7 to 15 years on both anthropometric and fitness data, but a significant RAE for girls was only evident for physical fitness tests among elementary school and not junior high school students. Thus, a significant RAE in anthropometry and physical fitness was evident in a general sample of school children, and there were RAE gender differences among adolescents.

  13. [Role of the ordinary surgeon Yvan beside Napoleon I on the night of April 12 to 13, 1814].

    Science.gov (United States)

    Goldcher, Alain

    2014-01-01

    Alexandre-Urbain Yvan was born on April 28th, 1765 in Toulon, where he entered the military hospital as a student at 14. He got acquainted with Napoleon Bonaparte during the campaigns of Italy. On May 6th, 1800 the Secretary of the war appointed him to the care of the First Consul. He became a close friend of the Bonaparte family and obtained the post of ordinary surgeon of the Emperor. He was going to follow his illustrious patient as his shadow until April 1814. Several arguments evoke Napoleon Ist's suicide attempt, during the night from 12 to 13 April, in Fontainebleau, after the abdication. He absorbed a poison with opium but his menservants thwarted his plan, especially Caulaincourt. Baron Yvan was called at the bedside of the dying sovereign and managed to save him by making him vomit. For fear of being accused of murder, or for some other reason, the surgeon ran away without telling the Emperor. This episode ended definitively the relation between Napoleon and Yvan.

  14. The prevalence of dental erosion and associated risk factors in 12-13-year-old school children in Southern China

    Directory of Open Access Journals (Sweden)

    Wang Ping

    2010-08-01

    Full Text Available Abstract Background Dental erosion has been investigated in developed and developing countries and the prevalence varies considerably in different countries, geographic locations, and age groups. With the lifestyle of the Chinese people changing significantly over the decades, dental erosion has begun to receive more attention. However, the information about dental erosion in China is scarce. The purpose of this study was to explore the prevalence of dental erosion and associated risk factors in 12-13-year-old school children in Guangzhou, Southern China. Methods This cross-sectional survey was performed by two trained, calibrated examiners. A stratified random sample of 12-13-year-old children (774 boys and 725 girls from 10 schools was examined for dental erosion using the diagnostic criteria of Eccles and the index of O'Sullivan was applied to record the distribution, severity, and amount of the lesions. Data on the socio-economic status, health behaviours, and general health involved in the etiology of dental erosion were obtained from a self-completed questionnaire. The analyses were performed using SPSS software. Results At least one tooth surface with signs of erosion was found in 416 children (27.3%. The most frequently affected teeth were the central incisors (upper central incisors, 16.3% and 15.9%; lower central incisors, 17.4% and 14.8%. The most frequently affected surface was the incisal or occlusal edge (43.2%. The loss of enamel contour was present in 54.6% of the tooth surfaces with erosion. Of the affected tooth surfaces, 69.3% had greater than one-half of the tooth surface was affected. The results from logistic regression analysis demonstrated that the children who were female, consumed carbonated drinks once a week or more, and those whose mothers were educated to the primary level tended to have more dental erosion. Conclusions Dental erosion in 12-13-year-old Chinese school children is becoming a significant problem. A

  15. The relationship of gross upper and lower limb motor competence to measures of health and fitness in adolescents aged 13-14 years.

    Science.gov (United States)

    Weedon, Benjamin David; Liu, Francesca; Mahmoud, Wala; Metz, Renske; Beunder, Kyle; Delextrat, Anne; Morris, Martyn G; Esser, Patrick; Collett, Johnny; Meaney, Andy; Howells, Ken; Dawes, Helen

    2018-01-01

    Motor competence (MC) is an important factor in the development of health and fitness in adolescence. This cross-sectional study aims to explore the distribution of MC across school students aged 13-14 years old and the extent of the relationship of MC to measures of health and fitness across genders. A total of 718 participants were tested from three different schools in the UK, 311 girls and 407 boys (aged 13-14 years), pairwise deletion for correlation variables reduced this to 555 (245 girls, 310 boys). Assessments consisted of body mass index, aerobic capacity, anaerobic power, and upper limb and lower limb MC. The distribution of MC and the strength of the relationships between MC and health/fitness measures were explored. Girls performed lower for MC and health/fitness measures compared with boys. Both measures of MC showed a normal distribution and a significant linear relationship of MC to all health and fitness measures for boys, girls and combined genders. A stronger relationship was reported for upper limb MC and aerobic capacity when compared with lower limb MC and aerobic capacity in boys (t=-2.21, degrees of freedom=307, P=0.03, 95% CI -0.253 to -0.011). Normally distributed measures of upper and lower limb MC are linearly related to health and fitness measures in adolescents in a UK sample. NCT02517333.

  16. Diagnostic Appraisal of Grade 12 Students' Understanding of Reaction Kinetics

    Science.gov (United States)

    Yan, Yaw Kai; Subramaniam, R.

    2016-01-01

    The study explored grade 12 students' understanding of reaction kinetics, a topic which has not been extensively explored in the chemistry education literature at this level. A 3-tier diagnostic instrument with 11 questions was developed--this format is of very recent origin and has been the subject of only a handful of studies. The findings…

  17. Differences and similarities in sexual and contraceptive knowledge, attitudes, and behavior among Latino male adolescent students in California, United States and Lima, Peru

    Directory of Open Access Journals (Sweden)

    Chirinos Jesús L.

    2001-01-01

    Full Text Available To identify the differences and similarities in sexual and contraceptive knowledge, attitudes, and behavior among Latino male adolescent students living in California and Lima. Self-administered, anonymous surveys were completed by Latino male students aged 12-19 participating in California, and by male adolescent students in four high schools in Lima. Both surveys contained similar questions allowing for comparisons regarding sexual activity and contraceptive behavior. The mean age of male students were 16 and 15 years, respectively. More California males reported having engaged in sexual intercourse (69% vs 43%. The sexual debut was 13 years in both samples. More students in California were aware of their risk of pregnancy at first sexual intercourse than in Lima (82% vs 50%. One-third of the California males reported communicating with their partner about sex and contraception to be "easy" as compared to 53% of males in Lima. More students in California reported knowing a place to obtain contraceptives if they need them (85% vs 63%, having ever gotten someone pregnant (29% vs 7%, and having fathered a child (67% vs 16%.

  18. Initiating New Science Partnerships in Rural Education: STEM Graduate Students Bring Current Research into 7th-12th Grade Science Classrooms

    Science.gov (United States)

    Radencic, S.; Dawkins, K. S.; Jackson, B. S.; Walker, R. M.; Schmitz, D.; Pierce, D.; Funderburk, W. K.; McNeal, K.

    2014-12-01

    Initiating New Science Partnerships in Rural Education (INSPIRE), a NSF Graduate K-12 (GK-12) program at Mississippi State University, pairs STEM graduate students with local K-12 teachers to bring new inquiry and technology experiences to the classroom (www.gk12.msstate.edu). The graduate fellows prepare lessons for the students incorporating different facets of their research. The lessons vary in degree of difficulty according to the content covered in the classroom and the grade level of the students. The focus of each lesson is directed toward the individual research of the STEM graduate student using inquiry based designed activities. Scientific instruments that are used in STEM research (e.g. SkyMaster weather stations, GPS, portable SEM, Inclinometer, Soil Moisture Probe, Google Earth, ArcGIS Explorer) are also utilized by K-12 students in the activities developed by the graduate students. Creativity and problem solving skills are sparked by curiosity which leads to the discovery of new information. The graduate students work to enhance their ability to effectively communicate their research to members of society through the creation of research linked classroom activities, enabling the 7-12th grade students to connect basic processes used in STEM research with the required state and national science standards. The graduate students become respected role models for the high school students because of their STEM knowledge base and their passion for their research. Sharing enthusiasm for their chosen STEM field, as well as the application techniques to discover new ideas, the graduate students stimulate the interests of the classroom students and model authentic science process skills while highlighting the relevance of STEM research to K-12 student lives. The measurement of the student attitudes about science is gathered from pre and post interest surveys for the past four years. This partnership allows students, teachers, graduate students, and the public to

  19. Helping Students Cope in an Age of Terrorism: Strategies for School Counselors

    Science.gov (United States)

    Chibbaro, Julia S.; Jackson, C. Marie

    2006-01-01

    School counselors experience unique challenges as they struggle to provide students with coping skills geared to the outside world including acts of terrorism. School-aged students in the United States are one of the most vulnerable populations in the event of a terrorist act. This article offers a review of the current and most relevant…

  20. Growth, maturation, functional capacities and sport-specific skills in 12-13 year-old- basketball players

    NARCIS (Netherlands)

    Coelho e Silva, M. J.; Moreira Carvalho, H.; Goncalves, C. E.; Figueiredo, A. J.; Elferink-Gemser, M. T.; Philippaerts, R. M.; Malina, R. M.

    Aim. The influence of maturity status on body size, functional capacities and basketball-specific skills was evaluated and multivariate relationships between domains of variables were examined in 80 male basketball players 12.0-13.9 years. Methods. Height, body mass and two skinfolds were measured.

  1. Going up in Dreams and Esteem: Cross-Age Mentoring to Promote Leadership Skills in High School-Age Gifted Students

    Science.gov (United States)

    Besnoy, Kevin D.; McDaniel, Sara C.

    2016-01-01

    Mentoring programs are an effective way to offer gifted students authentic learning opportunities. Although there are many mentoring models, the fundamental relationship between mentor and mentee has remained consistent throughout the ages. One mentoring model that has recently grown in popularity is the cross-age mentoring model. In this model,…

  2. Investigating Years 7 to 12 students' knowledge of linear relationships through different contexts and representations

    Science.gov (United States)

    Wilkie, Karina J.; Ayalon, Michal

    2018-02-01

    A foundational component of developing algebraic thinking for meaningful calculus learning is the idea of "function" that focuses on the relationship between varying quantities. Students have demonstrated widespread difficulties in learning calculus, particularly interpreting and modeling dynamic events, when they have a poor understanding of relationships between variables. Yet, there are differing views on how to develop students' functional thinking over time. In the Australian curriculum context, linear relationships are introduced to lower secondary students with content that reflects a hybrid of traditional and reform algebra pedagogy. This article discusses an investigation into Australian secondary students' understanding of linear functional relationships from Years 7 to 12 (approximately 12 to 18 years old; n = 215) in their approaches to three tasks (finding rate of change, pattern generalisation and interpretation of gradient) involving four different representations (table, geometric growing pattern, equation and graph). From the findings, it appears that these students' knowledge of linear functions remains context-specific rather than becoming connected over time.

  3. Differential Signatures of Second Language Syntactic Performance and Age on the Structural Properties of the Left Dorsal Pathway

    Directory of Open Access Journals (Sweden)

    Kayako Yamamoto

    2017-05-01

    Full Text Available In adult second language (L2 acquisition, individual differences are considerably large even among people with similar experiences. The neural mechanisms underlying this variability would include structural plasticity of language-related pathways. To elucidate such neuroplasticity, we focused on the transitional period of adolescence, which is associated with certain plasticity toward maturation following the sensitive period of language acquisition (≤12 years old. The adolescent brain would thus be influenced by age-dependent factors, as well as performances in L2. Here, we examined individual differences in L2 performances controlling the duration of experience to reveal the differential signatures of performances and age on the plasticity of structural properties in major language-related pathways. We recruited Japanese students at two ages, i.e., junior (age: 13–14 and senior (age: 16–17 high-school students, all of whom started to expose to English at age 12 or 13. We divided them into subgroups, so that either L2 performance [Junior (High/Senior (Low] or age [Senior (Low/Senior (High] was matched in group comparisons; the duration of L2 experience was also controlled between the Senior (Low and Senior (High groups. We then examined the thickness and fractional anisotropy (FA of the dorsal and ventral pathways, i.e., the arcuate fasciculus (Arcuate and inferior fronto-occipital fasciculus (IFOF, respectively, using semi-automatic methods for selecting regions without branches. Regarding FA in the left Arcuate, the Senior (High group showed significantly higher FA than the other two groups, indicating performance-related group differences. Further, FA in the left Arcuate was selectively correlated with the accuracy of a syntactic task. Regarding the thickness of the left Arcuate, the Senior (High and Senior (Low groups showed significantly larger thickness than the Junior (High group, indicating age-related group differences. These

  4. Comparison of menarche age between two generations (tehran lipid and glucose study)

    International Nuclear Information System (INIS)

    Ainy, E.; Aziz, F.

    2007-01-01

    Menarcheal age is considered to be an indicator of puberty. There is a lack of information on menarcheal age in Tehranian girls, in comparison to that of their mothers. This cross-sectional study was aimed at comparing the age of menarches between two generations. The subjects were 812 (406 daughters and 406 mothers) chosen from among 15005 participants of the longitudinal Tehran Lipid and Glucose Study. Demographic information and the age of menarche were recorded in a questionnaire. We have considered a minimal of 25 years duration to be one generation. Distribution of the menarcheal age and linear regression were performed. The mean age of menarche in daughters and their mothers were 13.2+-1.4 and 13.6+-1.5 years, respectively. There was significant correlation between the mother and daughter menarcheal age (r=0.25, P<0.002). 25th, 50th and 75th percentiles for menarcheal ages in daughters and their mothers were 12.2, 13.1, 14.1 and 12.7, 13.5, 14.5 years respectively. Minimum and maximum ages of menarche were the same (10 and 18 years) in the two groups. We found a decrease in the average menarcheal age during 25 years (one generation) similar to the results of other studies. (author)

  5. Reciprocal Education Experiences In Two GK-12 Programs: Teachers Learning And Students Teaching In Diverse Settings

    Science.gov (United States)

    Mayo, M.; Williams, C.; Rodriguez, T.; Greely, T.; Pyrtle, A. J.; Rivera-Rentas, A. L.; Vilches, M.

    2004-12-01

    The National Science Foundation's Graduate Teaching Fellows in K-12 Education (GK-12) Program has enabled science, technology, engineering and mathematics (STEM) graduate schools across the country to become more active in local area K-12 schools. An overview of a graduate student's experiences, insights gained and lessons learned as a Fellow in the 2003-2004 Universidad Metropolitana's (UMET) environmental science and the 2004-2005 University of South Florida's (USF) ocean science GK-12 Programs is presented. The major goals of the 2003-2004 UMET GK-12 Program were 1) to enrich environmental science teaching and learning via a thematic approach in eight local public schools and 2) to provide UMET graduate students with exposure to teaching methodologies and practical teaching experience. Utilizing examples from local environments in and nearby Carolina, Puerto Rico to teach key science principles at Escuela de la Comunidad Juana Rodriguez Mundo provided numerous opportunities to relate science topics to students' daily life experiences. By 2004, the UMET GK-12 Program had successfully engaged the entire student body (primarily comprised of bilingual minority kindergarten to sixth graders), teachers and school administrators in environment-focused teaching and learning activities. Examples of such activities include tree planting projects to minimize local erosion, conducting a science fair for the first time in many years, and numerous opportunities to experience what "real scientists do" while conducting environmental science investigations. During the 2004-2005 academic year, skills, insights and lessons learned as a UMET GK-12 Fellow are being further enhanced through participation in the USF GK-12 OCEANS Program. The overall objectives of the 2004-2005 USF GK-12 OCEANS assignment at Madeira Beach Elementary School in Saint Petersburg, Florida are to 1) engage students from various ethnic backgrounds and cultures in hands-on science activities, 2) enhance the

  6. Beverage Consumption Patterns at Age 13 to 17 Years Are Associated with Weight, Height, and Body Mass Index at Age 17 Years.

    Science.gov (United States)

    Marshall, Teresa A; Van Buren, John M; Warren, John J; Cavanaugh, Joseph E; Levy, Steven M

    2017-05-01

    Sugar-sweetened beverages (SSBs) have been associated with obesity in children and adults; however, associations between beverage patterns and obesity are not understood. Our aim was to describe beverage patterns during adolescence and associations between adolescent beverage patterns and anthropometric measures at age 17 years. We conducted a cross-sectional analyses of longitudinally collected data. Data from participants in the longitudinal Iowa Fluoride Study having at least one beverage questionnaire completed between ages 13.0 and 14.0 years, having a second questionnaire completed between 16.0 and 17.0 years, and attending clinic examination for weight and height measurements at age 17 years (n=369) were included. Beverages were collapsed into four categories (ie, 100% juice, milk, water and other sugar-free beverages, and SSBs) for the purpose of clustering. Five beverage clusters were identified from standardized age 13 to 17 years mean daily beverage intakes and named by the authors for the dominant beverage: juice, milk, water/sugar-free beverages, neutral, and SSB. Weight, height, and body mass index (BMI; calculated as kg/m 2 ) at age 17 years were analyzed. We used Ward's method for clustering of beverage variables, one-way analysis of variance and χ 2 tests for bivariable associations, and γ-regression for associations of weight or BMI (outcomes) with beverage clusters and demographic variables. Linear regression was used for associations of height (outcome) with beverage clusters and demographic variables. Participants with family incomes beverage cluster membership. For example, on average, male and female members of the neutral cluster were 4.5 cm (P=0.010) and 4.2 cm (P=0.034) shorter, respectively, than members of the milk cluster. For members of the juice cluster, mean BMI was lower than for members of the milk cluster (by 2.4 units), water/sugar-free beverage cluster (3.5 units), neutral cluster (2.2 units), and SSB cluster (3.2 units) (all

  7. The maternal age-related first trimester risks for trisomy 21, 18 and 13 based on Danish first trimester data from 2005 to 2014

    DEFF Research Database (Denmark)

    Hartwig, Tanja Schlaikjær; Sørensen, Steen; Jørgensen, Finn Stener

    2016-01-01

    OBJECTIVES: Most currently used age-related risks of T21, T18 and T13 are based on estimates of the live-birth prevalence, and describe an exponential increase of risk by increased maternal age. We investigated the first trimester prevalence of T21, T18 and T13 in a large population of Danish women......) / slope)) was found to best describe the age-related risk of T21, T18 and T13. CONCLUSION: We found that the age-related risks are better described by sigmoidal functions, contrary to the widely assumed exponential functions. Our results indicate a lower age-related a priori risk of T21, T18 and T13...

  8. Earth system science K-12 scientist-student partnerships using paleontological materials

    Science.gov (United States)

    Harnik, P. G.; Ross, R. M.; Chiment, J. J.; Sherpa, J. M.

    2001-05-01

    Reducing the discrepancy between the dynamic science that researchers experience and the static fact-driven science education in which k-12 students participate at school is an important component to national science education reform. Scientist-student partnerships (SSPs) involving whole classes in Earth systems research provide a solution to this problem, but existing models have often lacked rigorous scientific data quality control and/or evaluation of pedagogical effectiveness. The Paleontological Research Institution has been prototyping two SSPs with an eye toward establishing protocols to insure both scientific and educational quality of the partnership. Data quality analysis involves making statistical estimates of data accuracy and employing robust statistical techniques for answering essential questions with noisy data. Educational evaluation takes into account affective variables, such as student motivation and interest, and compares the relative pedagogical effectiveness of SSPs with more traditional hands-on activities. Paleontology is a natural subject for scientist-student partnerships because of its intrinsic appeal to the general public, and because its interdisciplinary content serves as a springboard for meeting science education standards across the physical and life sciences. The "Devonian Seas" SSP involves classes in identifying fossil taxa and assessing taphonomic characteristics from Devonian-aged Hamilton Group shales in Central New York. The scientific purpose of the project is to establish at high stratigraphic resolution the sequence of dysoxic biofacies composition, which will shed light on the sensitivity of epeiric sea communities to environmental (e.g., sea level) changes. The project is undertaken in upper elementary school and secondary school Earth science classes, and in some cases has involved field-based teacher training and collection of samples. Students in small teams collaborate to identify taxa within the samples, then

  9. Sleep behaviors in traditional-age college students: A state of the science review with implications for practice.

    Science.gov (United States)

    Owens, Heather; Christian, Becky; Polivka, Barbara

    2017-11-01

    The purpose of this systematic review was to examine influences affecting sleep behavior in traditional-age college students and to advocate for improved sleep behavior assessments. A literature search of CINAHL, MEDLINE, and PubMed databases was performed using the search terms "college students" and "sleep" in the title that were published in English from 1978 to 2016. The circadian clock is reset in traditional-age college students leading to delayed sleep times. Newly realized autonomy and increased use of technology also prevent traditional-age college students from obtaining sufficient sleep. Insufficient sleep experienced by these students has been linked to insulin resistance, hypertension, diabetes, weight gain, and stress. Sleep insufficiency increases the risk for pedestrian, motor vehicle, and domestic and occupational injuries. Insufficient sleep may result in poor academic performance influencing subsequent health outcomes. Evidence supports the need for nurse practitioners and other healthcare providers to incorporate systematic sleep behavior assessments to improve health outcomes among traditional-age college students. ©2017 American Association of Nurse Practitioners.

  10. Drug use in college students: a 13-year trend Uso de drogas entre alumnos universitarios: tendencias en 13 años Uso de drogas entre alunos universitários: tendências em 13 anos

    Directory of Open Access Journals (Sweden)

    Gabriela Arantes Wagner

    2012-06-01

    Full Text Available OBJECTIVE: To analyze drug use trends among college students in 1996, 2001 and 2009. METHODS: A cross-sectional epidemiological study with a multistage stratified cluster sample with 9,974 college students was conducted in the city of São Paulo, southeastern Brazil. An anonymous self-administered questionnaire was used to collect information on drug use assessed in lifetime, the preceding 12 months and the preceding 30 days. The Bonferroni correction was used for multiple comparisons of drug use rates between surveys. RESULTS: There were changes in the lifetime use of tobacco and some other drugs (hallucinogens [6.1% to 8.8%], amphetamines [4.6% to 8.7%], and tranquilizers [5.7% to 8.2%] from 1996 to 2009. Differences in the use of other drugs over the 12 months preceding the survey were also seen: reduced use of inhalants [9.0% to 4.8%] and increased use of amphetamines [2.4% to 4.8%]. There was a reduction in alcohol [72.9% to 62.1%], tobacco [21.3% to 17.2%] and marijuana [15.0% to 11.5%] use and an increase in amphetamine use [1.9% to 3.3%] in the preceeding 30 days. CONCLUSIONS: Over the 13-year study period, there was an increase in lifetime use of tobacco, hallucinogens, amphetamines, and tranquilizers. There was an increase in amphetamine use and a reduction in alcohol use during the preceding 12 months. There was an increase in amphetamine use during the preceding 30 days.OBJETIVO: Analizar la tendencia del uso de drogas entre universitarios en 1996, 2001 y 2009. MÉTODOS: estudio epidemiológico transversal con 9.974 universitarios del municipio de Sao Paulo, Sureste de Brasil, cuya muestra fue seleccionada por estratificación y conglomerados. Se adoptó instrumento de investigación de auto llenado, anónimo, que caracterizó el uso de drogas por tres medidas: uso en la vida, en los últimos 12 meses y en los últimos 30 días. Para comparar las frecuencias de uso de drogas entre las investigaciones, se utilizó la metodología de

  11. Hierarchically porous micro-rod lithium-rich cathode material Li1.2Ni0.13Mn0.54Co0.13O2 for high performance lithium-ion batteries

    International Nuclear Information System (INIS)

    Zhang, Linjing; Borong, Wu.; Ning, Li.; Feng, Wu.

    2014-01-01

    Graphical abstract: - Highlights: • The hierarchically porous micro-rod Li 1.2 Ni 0.13 Mn 0.54 Co 0.13 O 2 material is prepared by a facile hydrothermal method. • This material exhibits good cycling performance. • It delivers discharge capacities of 280.7, 254.8, 232.3, 225.6, 201.7 and 172.7 mAh g −1 at 0.1 C, 0.2 C, 0.5 C, 1 C, 2 C and 5 C rates, respectively. • Excellent rate capability and cycleability are obtained attributed to the hierarchically porous micro-rod structure. - Abstract: Lithium-rich cathode material Li 1.2 Ni 0.13 Mn 0.54 Co 0.13 O 2 with hierarchically porous micro-rod structures has been synthesized using a facile hydrothermal method. The morphology and XRD patterns explain the formation mechanism of the sample. Micro-rod oxalates precursor with rough surface is formed during the hydrothermal reaction, and then the product with hierarchically porous structures constructed of nanoparticles is synthesized during the sintering process at high temperatures. The electrochemical performance results show that the as-prepared sample exhibits high capacities, good cycleability and outstanding rate capability. It delivers discharge capacities of 280.7, 254.8, 232.3, 225.6, 201.7 and 172.7 mAh g −1 at 0.1 C, 0.2 C, 0.5 C, 1 C, 2 C and 5 C rates, respectively. The cycle voltammograms indicate the good reversibility of the as-prepared Li 1.2 Ni 0.13 Mn 0.54 Co 0.13 O 2 material. The high onset temperature of the exothermal peak in the differential scanning calorimetry curve implies its good thermal stability. The good performance of the as-prepared material is endowed by its hierarchically porous structures

  12. Changes in consumption of added sugars from age 13 to 30 years: a systematic review and meta-analysis of longitudinal studies.

    Science.gov (United States)

    Winpenny, E M; Penney, T L; Corder, K; White, M; van Sluijs, E M F

    2017-11-01

    Added sugar intake during adolescence has been associated with weight gain and cardiometabolic risk factors. Moreover, dietary habits may persist into adulthood, increasing chronic disease risk in later life. This systematic review investigated changes in intake of added sugars between the ages of 13 and 30 years. Literature databases were searched for longitudinal studies of diet during adolescence or early adulthood. Retrieved articles were screened for studies including multiple measures of intake of sugars or sugary foods from cohort participants between the ages of 13 and 30. Data were analysed using random-effects meta-analysis, by the three main nutrient and food group categories identified (PROSPERO: CRD42015030126). Twenty-four papers reported longitudinal data on intake of added sugar or sucrose (n = 6), sugar-sweetened beverages (SSBs) (n = 20) and/or confectionery (n = 9). Meta-analysis showed a non-significant per year of age decrease in added sugar or sucrose intake (-0.15% total energy intake (95%CI -0.41; 0.12)), a decrease in confectionery consumption (-0.20 servings/week (95%CI -0.41; -0.001)) and a non-significant decrease in SSB consumption (-0.15 servings/week (95%CI -0.32; 0.02)). Taken together, the overall decrease in added sugar intake observed from adolescence to early adulthood may suggest opportunities for intervention to further improve dietary choices within this age range. © 2017 The Authors. Obesity Reviews published by John Wiley & Sons Ltd on behalf of World Obesity Federation.

  13. 45 CFR 91.13 - Exceptions to the rules against age discrimination: Normal operation or statutory objective of...

    Science.gov (United States)

    2010-10-01

    ... objective of any program or activity. A recipient is permitted to take an action, otherwise prohibited by...: Normal operation or statutory objective of any program or activity. 91.13 Section 91.13 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION NONDISCRIMINATION ON THE BASIS OF AGE IN...

  14. Developing the Scale for Quality of Life in Pediatric Oncology Patients Aged 13-18: Adolescent Form and Parent Form.

    Science.gov (United States)

    Bektas, Murat; Akdeniz Kudubes, Aslı; Ugur, Ozlem; Vergin, Canan; Demirag, Bengü

    2016-06-01

    This study aimed to develop the Scale for Quality of Life in Pediatric Oncology Patients Aged 13-18: Adolescent Form and Parent Form. We used the child and parent information form, Visual Quality of Life Scale, and our own scale, the Scale for Quality of Life in Pediatric Oncology Patients Aged 13-18: Adolescent Form and Parent Form. We finalized the 35-item scale to determine the items, received opinions from 14 specialists on the scale, and pilot-tested the scale in 25 children and their parents. We used Pearson correlation analysis, Cronbach α coefficient, factor analysis and receiver operating characteristics analysis to analyze the data. The total Cronbach α of the parent form was .97, the total factor load was .60-.97 and the total variance was 80.4%. The cutoff point of the parent form was 85.50. The total Cronbach α of the adolescent form was .98, the total factor load was .62-.96, and the total variance explained was 83.4%. The cutoff point of the adolescent form was 75.50. As a result of the parent form factor analysis, we determined the Kaiser-Meyer-Olkin coefficient as .83, the Barlett test χ(2) as 12,615.92; the factor coefficients of all items of the parent form ranged from .63 to .98. The factor coefficients of all items of the adolescent form ranged from .34 to .99. As a result of the adolescent form factor analysis, we determined the KMO as .79, and the Barlett test χ(2) as 13,970.62. Conclusively, we found that the adolescent form and the parent form were valid and reliable in assessing the children's quality of life. Copyright © 2016. Published by Elsevier B.V.

  15. Trends of 13C/12C ratios in pinyon tree rings of the American Southwest and the global carbon cycle

    International Nuclear Information System (INIS)

    Leavitt, S.W.; Long, A.

    1986-01-01

    An accurate atmospheric 13 C/ 12 C chronology can provide important constraints to models of the global carbon cycle. Trees accumulate carbon from atmospheric CO 2 into growth rings and offer potential for 13 C/ 12 C reconstructions, but results have not been reproducible. This paper presents δ 13 C curves from 5 sites, representing 20 pinyon (Pinus edulis) trees, where cores of 4 trees from each site have been pooled into a composite sample. Isotopic analysis of cellulose in 5-yr ring groups produces curves with a general trend of decreasing δ 13 C after 1800, but with pronounced short-term fluctuations superimposed upon the trend. Evidence indicates the fluctuations are strongly related to moisture availability (drought). A mean curve of the 5 δ 13 C chronologies from which the fossil-fuel component is subtracted suggests a substantial biospheric CO 2 contribution to the atmosphere since 1800

  16. Grade 1 to 6 Thai students' existing ideas about light: Across-age study

    Science.gov (United States)

    Horasirt, Yupaporn; Yuenyong, Chokchai

    2018-01-01

    This paper aimed to investigate Grade 1 to 6 Thai (6 - 12 years old) students' existing ideas about light, sight, vision, source of light. The participants included 36 Grade 1 to 6 students (6 students in each Grade) who studying at a primary school in Khon Kaen. The method of this study is a descriptive qualitative research design. The tools included the two-tiered test about light and open-ended question. Students' responses were categorized the students' existing ideas about light. Findings indicated that young students held various existing ideas about light that could be categorized into 6 different groups relating to sight, vision, and source of light. The paper discussed these students' existing ideas for developing constructivist learning about light in Thailand context.

  17. Measurement of the /sup 12/C(n,γ0)/sup 13/C cross section in the giant dipole resonance region

    International Nuclear Information System (INIS)

    August, R.A.; Weller, H.R.; Tilley, D.R.

    1987-01-01

    The /sup 12/C(n,γ 0 ) /sup 13/C excitation function at 90 0 has been measured for neutron energies from 6.5 to 18.5 MeV. Whereas previous measurements disagreed at the lower energies with a direct-semidirect capture calculation based on /sup 12/C(p,γ 0 ) /sup 13/N data, the present results, especially when the uncertainty in absolute cross section is considered, indicate reasonable qualitative agreement with the calculation

  18. Birth order modifies the effect of IL13 gene polymorphisms on serum IgE at age 10 and skin prick test at ages 4, 10 and 18: a prospective birth cohort study

    Science.gov (United States)

    2010-01-01

    Background Susceptibility to atopy originates from effects of the environment on genes. Birth order has been identified as a risk factor for atopy and evidence for some candidate genes has been accumulated; however no study has yet assessed a birth order-gene interaction. Objective To investigate the interaction of IL13 polymorphisms with birth order on allergic sensitization at ages 4, 10 and 18 years. Methods Mother-infant dyads were recruited antenatally and followed prospectively to age 18 years. Questionnaire data (at birth, age 4, 10, 18); skin prick test (SPT) at ages 4, 10, 18; total serum IgE and specific inhalant screen at age 10; and genotyping for IL13 were collected. Three SNPs were selected from IL13: rs20541 (exon 4, nonsynonymous SNP), rs1800925 (promoter region) and rs2066960 (intron 1). Analysis included multivariable log-linear regression analyses using repeated measurements to estimate prevalence ratios (PRs). Results Of the 1456 participants, birth order information was available for 83.2% (1212/1456); SPT was performed on 67.4% at age 4, 71.2% at age 10 and 58.0% at age 18. The prevalence of atopy (sensitization to one or more food or aeroallergens) increased from 19.7% at age 4, to 26.7% at 10 and 41.1% at age 18. Repeated measurement analysis indicated interaction between rs20541 and birth order on SPT. The stratified analyses demonstrated that the effect of IL13 on SPT was restricted only to first-born children (p = 0.007; adjusted PR = 1.35; 95%CI = 1.09, 1.69). Similar findings were noted for firstborns regarding elevated total serum IgE at age 10 (p = 0.007; PR = 1.73; 1.16, 2.57) and specific inhalant screen (p = 0.034; PR = 1.48; 1.03, 2.13). Conclusions This is the first study to show an interaction between birth order and IL13 polymorphisms on allergic sensitization. Future functional genetic research need to determine whether or not birth order is related to altered expression and methylation of the IL13 gene. PMID:20403202

  19. Birth order modifies the effect of IL13 gene polymorphisms on serum IgE at age 10 and skin prick test at ages 4, 10 and 18: a prospective birth cohort study

    Directory of Open Access Journals (Sweden)

    Ogbuanu Ikechukwu U

    2010-04-01

    Full Text Available Abstract Background Susceptibility to atopy originates from effects of the environment on genes. Birth order has been identified as a risk factor for atopy and evidence for some candidate genes has been accumulated; however no study has yet assessed a birth order-gene interaction. Objective To investigate the interaction of IL13 polymorphisms with birth order on allergic sensitization at ages 4, 10 and 18 years. Methods Mother-infant dyads were recruited antenatally and followed prospectively to age 18 years. Questionnaire data (at birth, age 4, 10, 18; skin prick test (SPT at ages 4, 10, 18; total serum IgE and specific inhalant screen at age 10; and genotyping for IL13 were collected. Three SNPs were selected from IL13: rs20541 (exon 4, nonsynonymous SNP, rs1800925 (promoter region and rs2066960 (intron 1. Analysis included multivariable log-linear regression analyses using repeated measurements to estimate prevalence ratios (PRs. Results Of the 1456 participants, birth order information was available for 83.2% (1212/1456; SPT was performed on 67.4% at age 4, 71.2% at age 10 and 58.0% at age 18. The prevalence of atopy (sensitization to one or more food or aeroallergens increased from 19.7% at age 4, to 26.7% at 10 and 41.1% at age 18. Repeated measurement analysis indicated interaction between rs20541 and birth order on SPT. The stratified analyses demonstrated that the effect of IL13 on SPT was restricted only to first-born children (p = 0.007; adjusted PR = 1.35; 95%CI = 1.09, 1.69. Similar findings were noted for firstborns regarding elevated total serum IgE at age 10 (p = 0.007; PR = 1.73; 1.16, 2.57 and specific inhalant screen (p = 0.034; PR = 1.48; 1.03, 2.13. Conclusions This is the first study to show an interaction between birth order and IL13 polymorphisms on allergic sensitization. Future functional genetic research need to determine whether or not birth order is related to altered expression and methylation of the IL13 gene.

  20. Soft tissue thickness values for black and coloured South African children aged 6-13 years.

    Science.gov (United States)

    Briers, N; Briers, T M; Becker, P J; Steyn, M

    2015-07-01

    In children, craniofacial changes due to facial growth complicate facial approximations and require specific knowledge of soft tissue thicknesses (STT). The lack of South African juvenile STT standards of particular age groups, sex and ancestry is problematic. According to forensic artists in the South African Police Service the use of African-American values to reconstruct faces of Black South African children yields poor results. In order to perform a facial approximation that presents a true reflection of the child in question, information regarding differences in facial soft tissue at different ages, sexes and ancestry groups is needed. The aims of this study were to provide data on STT of South African Black and Coloured children and to assess differences in STT with respect to age, sex and ancestry. STT was measured using cephalograms of South African children (n=388), aged 6-13 years. After digitizing the images, STT measurements were taken at ten mid-facial landmarks from each image using the iTEM measuring program. STT comparisons between groups per age, sex and ancestry were statistically analyzed. The results showed that STT differences at lower face landmarks are more pronounced in age groups per ancestry as opposed to differences per age and sex. Generally, an increase in STT was seen between 6-10 year old groups and 11-13 year old groups, regardless of ancestry and sex, at the midphiltrum, labiale inferius, pogonion, and beneath chin landmarks. This research created a reference dataset for STT of South African children of Black and Coloured ancestry per age and sex that will be useful for facial reconstruction/approximation of juvenile remains. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  1. Cognitive Functions in Elite and Sub-Elite Youth Soccer Players Aged 13 to 17 Years.

    Science.gov (United States)

    Huijgen, Barbara C H; Leemhuis, Sander; Kok, Niels M; Verburgh, Lot; Oosterlaan, Jaap; Elferink-Gemser, Marije T; Visscher, Chris

    2015-01-01

    Soccer players are required to anticipate and react continuously in a changing, relatively unpredictable situation in the field. Cognitive functions might be important to be successful in soccer. The current study investigated the relationship between cognitive functions and performance level in elite and sub-elite youth soccer players aged 13-17 years. A total of 47 elite youth soccer players (mean age 15.5 years, SD = 0.9) and 41 sub-elite youth soccer players (mean age 15.2 years, SD = 1.2) performed tasks for "higher-level" cognitive functions measuring working memory (i.e., Visual Memory Span), inhibitory control (i.e., Stop-Signal Task), cognitive flexibility (i.e., Trail Making Test), and metacognition (i.e., Delis-Kaplan Executive Function System Design Fluency Test). "Lower-level" cognitive processes, i.e., reaction time and visuo-perceptual abilities, were also measured with the previous tasks. ANOVA's showed that elite players outscored sub-elite players at the "higher-level" cognitive tasks only, especially on metacognition (p soccer players on inhibitory control (p = .001), and cognitive flexibility (p = .042), but not on metacognition (p = .27). No differences were found concerning working memory nor the "lower-level" cognitive processes (p > .05). In conclusion, elite youth soccer players have better inhibitory control, cognitive flexibility, and especially metacognition than their sub-elite counterparts. However, when training hours are taken into account, differences between elite and sub-elite youth soccer players remain apparent on inhibitory control and cognitive flexibility in contrast to metacognition. This highlights the need for longitudinal studies to further investigate the importance of "higher-level" cognitive functions for talent identification, talent development and performance in soccer.

  2. K-12 Students' Perceptions of Scientists: Finding a Valid Measurement and Exploring Whether Exposure to Scientists Makes an Impact

    Science.gov (United States)

    Hillman, Susan J.; Bloodsworth, Kylie H.; Tilburg, Charles E.; Zeeman, Stephan I.; List, Henrietta E.

    2014-01-01

    This study was launched from a National Science Foundation GK-12 grant in which graduate fellows in Science, Technology, Engineering, and Mathematics (STEM) are placed in classrooms to engage K-12 students in STEM activities. The investigation explored whether the STEM Fellows' presence impacted the K-12 students' stereotypical image of a…

  3. Physical Activity in U.S. Youth Aged 12-15 Years, 2012

    Science.gov (United States)

    ... Order from the National Technical Information Service NCHS Physical Activity in U.S. Youth Aged 12–15 Years, 2012 ... percentage of youth engaged in moderate-to-vigorous physical activity for at least 60 minutes each day? About ...

  4. What Makes a Student Non-Traditional? A Comparison of Students over and under Age 25 in Online, Accelerated Psychology Courses

    Science.gov (United States)

    Tilley, Brian P.

    2014-01-01

    The growing proportion of non-traditional students, very commonly defined as students over the age of 25 (though other features vary from study to study) necessitates more studies with this increasingly relevant group participating. Recently, the growth of non-traditional universities such as those offering predominantly online, accelerated…

  5. Diels-Alder Reactions of 12-Hydroxy-9(10®20-5aH-abeo-abieta-1(10,8(9,12(13-triene-11,14-dione

    Directory of Open Access Journals (Sweden)

    Shougang Hu

    2013-06-01

    Full Text Available 12-Hydroxy-9(10®20-5aH-abeo-abieta-1(10,8(9,12(13-triene-11,14-dione (quinone 2 served as the dienophile in numerous intermolecular Diels-Alder reactions. These cycloadditions were conducted either thermally (including microwave heating or with Lewis acid activation. While most dienes reacted with quinone 2 in good chemical yield, others were incompatible under the experimental conditions used.

  6. A Longitudinal Analysis of Students' Autobiographical Memories of Participation in Multiple Sport Education Seasons

    Science.gov (United States)

    Wahl-Alexander, Zachary; Sinelnikov, Oleg; Curtner-Smith, Matthew

    2017-01-01

    The purpose of this study was to examine middle school students' recollections of their participation in a significant number of Sport Education seasons over a period of five years. Thirty-one (18 boys and 13 girls) eighth-grade students (average age at data collection = 13 years) who had all participated in at least 17 Sport Education seasons…

  7. Correction: Electronic structure of the boron fullerene B14 and its silicon derivatives B13Si+, B13Si- and B12Si2: a rationalization using a cylinder model.

    Science.gov (United States)

    Van Duong, Long; Nguyen, Minh Tho

    2016-08-28

    Correction for 'Electronic structure of the boron fullerene B 14 and its silicon derivatives B 13 Si + , B 13 Si - and B 12 Si 2 : a rationalization using a cylinder model' by Long Van Duong et al., Phys. Chem. Chem. Phys., 2016, 18, 17619-17626.

  8. Relationship between carcass traits, prime cuts and carcass grading from foals slaughtered at the age of 13 and 26 months and supplemented with standard and linseed-rich feed.

    Science.gov (United States)

    Ruiz, M; Sarriés, M V; Beriain, M J; Crecente, S; Domínguez, R; Lorenzo, J M

    2018-05-01

    In order to improve foal carcass quality, it is necessary in particular to improve the carcass dressing percentage and tissue composition. Thus, it is important to establish relationships between grading systems and these parameters. This research was conducted to study the effect of slaughter age (13 v. 26 months) and finishing feed (standard v. linseed feed) on carcass characteristics such as subcutaneous fat colour plus classification of foals for the degree of fatness and conformation. For this study, 46 foals of crossbred genotype (Galician Mountain×Burguete) were used. Finishing feed did not affect any parameter, whereas slaughter age influenced all parameters (Pcarcass measurements, 13% more of meat, 4% more of bone, 12% more of fat, and 4% and 9% bigger fore- and hindquarter, respectively. Consequently, bigger valuable prime cuts were obtained. Nevertheless, the meat : bone ratio was very similar for both 13- and 26-month-old foals (2.88). Most of 26-month-old foals were classified in 'E' (Extra) and '5' (Complete fat cover) categories of conformation and degree of fatness. Most of the carcasses showed subcutaneous fat described as yellowish-white irrespective of age or diet. A regression model found that conformation (36%) and degree of fatness (33%) in live animals was positively linked with carcass tissue composition. It is therefore suggested that producers aim for older slaughter ages than 13 months and that the foal meat industry establishes grading systems to predict carcass quality. Further studies should be necessary to find the optimal slaughter age to obtain carcasses in the best categories of degree of fatness and conformation. New studies should be recommended to improve the meat : bone ratio of foal carcasses as it estimates the aptitude for meat production.

  9. Reasons for Discontinuing Study: The Case of Mature Age Female Students with Children.

    Science.gov (United States)

    Scott, Catherine; And Others

    1996-01-01

    A study of 118 adult women students, with children, in 3 Australian universities found 3 major factors in withdrawal: socioeconomic class (lack of family support for mother's study, lack of money, domestic responsibilities, lack of needed skills); nontraditional major (economics, business, law); and age (younger students because of family or…

  10. Attitudes of medical students to induced abortion.

    Science.gov (United States)

    Buga, G A B

    2002-05-01

    Unsafe abortion causes 13% of maternal deaths worldwide. Safe abortion can only be offered under conditions where legislation has been passed for legal termination of unwanted pregnancy. Where such legislation exists, accessibility of safe abortion depends on the attitudes of doctors and other healthcare workers to induced abortion. Medical students as future doctors may have attitudes to abortion that will affect the provision of safe abortion. Little is known about the attitudes of South African medical students to abortion. To assess sexual practices and attitudes of medical students to induced abortion and to determine some of the factors that may influence these attitudes. A cross-sectional analytic study involving the self-administration of an anonymous questionnaire. The questionnaire was administered to medical students at a small, but growing, medical school situated in rural South Africa. Demographic data, sexual practices and attitudes to induced abortion. Two hundred and forty seven out of 300 (82.3%) medical students responded. Their mean age was 21.81 +/- 3.36 (SD) years, and 78.8% were Christians, 17.1% Hindus and 2.6% Muslims. Although 95% of the respondents were single, 68.6% were already sexually experienced, and their mean age at coitarche was 17.24+/-3.14 (SD) years. Although overall 61.2% of the respondents felt abortion is murder either at conception or later, the majority (87.2%) would perform or refer a woman for abortion under certain circumstances. These circumstances, in descending order of frequency, include: threat to mother's life (74.1%), in case of rape (62.3%), the baby is severely malformed (59.5%), threat to mother's mental health (53.8%) and parental incompetence (21.0%). Only 12.5% of respondents would perform or refer for abortion on demand, 12.8% would neither perform nor refer for abortion under any circumstances. Religious affiliation and service attendance significantly influenced some of these attitudes and beliefs

  11. What Do K-12 Teachers Think about Including Student Surveys in Their Performance Ratings?

    Science.gov (United States)

    Dretzke, Beverly J.; Sheldon, Timothy D.; Lim, Alicia

    2015-01-01

    This study investigated K-12 teachers' opinions about the use of student surveys as a component of a teacher evaluation system. Surveys were administered to teachers at the beginning of the school year and again in the spring. Analyses of teachers' responses on the fall survey indicated tentative support for the inclusion of student feedback in…

  12. Anxiety of School-Age Childre (10 – 12 Years) Face Menarche at Mojoroto Village Kediri City

    OpenAIRE

    Wati, Susi Erna

    2015-01-01

    Child age at ranging Elementary School 6 to 12 years, this term constitute school term. Child those are on SD's early class is child that lies on early age elongation. Early age term constitute child developing term that short but constitutes term that really necessary for its life. Therefore, on this term all proprietary potency child needs to be pushed so will optimal ala amends. Menarche constitute first menstruating that ordinary happening deep age range 10 to 12 years. All this time a ...

  13. Peer relationships: Differences considering intellectual abilities and age

    Directory of Open Access Journals (Sweden)

    Jelić Marija M.

    2016-01-01

    Full Text Available Problems with peers are more common among children with intellectual disabilities (ID than typical development (TD children. As a lack of research in this field states the heterogeneity of the samples in relation to the level of disability and age, which is important for the ability to plan preventive programs and targeted interventions. The aim of this study was to examine the association between intellectual status and age with peer relationships. The study included 206 students aged 12 to 18 years, of which 76 with mild ID and 130 TD. Peer relationships were measured by Rahim Organizational Conflict Inventory (compromise, problem solving, yielding, avoidance and domination and by The Strenghts and Difficulties Questionnaires, subscale Problems with peers, form for teachers. The main findings showed that students with mild ID have more problems with peers than TD students. Unlike TD students, students with mild IO at secondary school more often yielding and avoidance conflicts. At later age dominance is less frequent in both groups of students, and problem solving and compromise are statistically more frequent in students with mild ID group than in TD peers group. It was concluded that negative social experience of young people with mild ID simultaneously motivate to constructive and destructive ways of resolving conflicts.

  14. Violence behavior and factors associated among students of Central-West Brazil.

    Science.gov (United States)

    Castro, Marta de Lima; Cunha, Sergio Souza da; Souza, Delma P Oliveira de

    2011-12-01

    To estimate the prevalence of violence among adolescents and young adults and to identify associated factors. Cross-sectional study carried out in 2008 with systematic random sampling of 699 elementary and high school students enrolled in urban state schools of Barra do Garças, Central-Western Brazil. A self-administered questionnaire was applied in the classrooms without the presence of the teacher. The outcome "violent behavior" was defined as (1) use of firearm or sharp instrument, and/or (2) aggression against oneself and/or others, and/or (3) suicide attempt. The analyzed independent variables were age, gender, socioeconomic status, use of alcohol, use of psychoactive drugs, sexual activity, and relationship between parents. Univariate analysis was conducted, as well as multiple regression adjusted for effect of clustering. Violence prevalence was of 18.6%, varying with age: 10.1% in the group aged 10 and 11 years; 20.2% for those aged 12-19 years; and 4.5% in the group aged 20-21 years. The factors associated with violent behavior were use of alcohol (RP = 2.51, 95%CI 1.22;5.15), use of psychoactive drugs (RP = 2.10, 95%CI 1.61;2.75), male gender (RP = 1.63, 95%CI 1.13;2.35) and unsatisfactory relationship between parents (RP = 1.64, 95%CI 1.25;2.15). Results indicate high prevalence of violence among adolescents in the age group 12-19 years, mainly among users of alcohol and drugs, of the male sex, from families whose parents do not have satisfactory relationships. Although without statistical significance in the final regression model, school result discrepancy and socioeconomic level should be considered in educational actions for prevention of violence behavior among students.

  15. Students (ages 6, 10, and 15 years in six countries knowledge of animals

    Directory of Open Access Journals (Sweden)

    Patricia Patrick

    2013-04-01

    Full Text Available This article considers the knowledge students (ages 6, 10, and 15 years have of animals from a cross-cultural perspective. Students from six countries (Brazil, England, Finland, Iceland, Portugal, and the United States of America were asked to free-list as many animals as possible and state where they had seen or learned about the animals. The results were analyzed and they indicate that 1 Students are aware of animals. 2 Students are more aware of mammals as examples of animals. 3 There is a globally shared folk biological knowledge of animals. 4 Students learn about animals during sociocultural interactions. The educational implications are discussed.

  16. Substance Use among Medical Students in Kathmandu Valley

    Directory of Open Access Journals (Sweden)

    P Khanal

    2010-12-01

    Full Text Available Introduction: Substance use including tobacco and alcohol is the most important cause of preventable morbidity, disability, and premature mortality. The study aims to specify the prevalence and the pattern of use of different substance. Methods: A cross sectional study was performed amongst first year and final year students in four medical colleges in Kathmandu using self administered anonymous questionnaire.Data collectedfrom 446 students were analyzed. Results: Prevalence of substance use was found to be 60.3% among the medical students. Alcohol (57.6% was the substance most prevalently used followed by tobacco (27.58% and cannabis (12.8%. Mean age of first exposure was 17.94 (Confidence interval: 17.91-17.97. There was significant difference in the useof tobacco and cannabis amongst final year students than first year students. Male and female differed significantly in use of every substance except for benzodiazepine. Medical college, college and school were place of first exposure in 17.26%, 15.92% and 13.23% of the cases respectively. Family history was associated with substance use in medical students and was statistically significant (P<0.0001.Experimentation was the major reason for the use of most of the substances. Conclusions: Substance use is prevalent in male medical students of both first and final year. Hence steps should be initiated early in school, college and medical college to prevent substance use. Keywords: alcohol, medical students, substance use, tobacco.

  17. Inference of past atmospheric delta13C and P/sub CO2/ from 13C/12C measurements in tree rings

    International Nuclear Information System (INIS)

    Leavitt, S.W.

    1982-01-01

    Carbon dioxide release from fossil-fuel burning is significant enough that we may soon experience perceptible changes in climate with important human consequences. An accurate reconstruction of past 13 C/ 12 C ratios of atmospheric CO 2 may provide key constraints on the historical activity of the biosphere as CO 2 source or sink. Tree rings appear to be a repository of this information but there is much noise in the collection of previous reconstructions, presumably associated with site selection, radial variability, choice of representative wood chemical constituent, and subtle effects of climate on fractionation. This study attempts to avoid these pitfalls and develop a 50-yr delta 13 C/sub ATM/ record from juniper trees (genus Juniperus), in fact, by taking advantage of the influence of climate on fractionation. Trees were harvested from suitable sites in close proximity to weather stations with monthly records of temperature and precipitation. The most useful relationships for at most 7 of the 10 sites were delta 13 C with December temperature or precipitation, because the coefficients were nearly constant from one interval to the next and the intercepts differed. Local pollution effects are believed responsible for the three anomalous sites. The separation of these regression lines of different intervals is interpreted as the response of the trees to the changing delta 13 C of atmospheric CO 2 so that delta 13 C/sub ATM/ curves are constructed from this spacing. The shape of the best-fit reconstruction suggests the biosphere has acted as CO 2 source to about 1965 and may now be a net sink

  18. Prevalence of Depression among Undergraduate Students: Gender and Age Differences

    Directory of Open Access Journals (Sweden)

    Leila Ghaedi

    2014-06-01

    Full Text Available Depressive disorders are the most typical disease affecting many different factors of humanity. University students may be at increased risk of depression owing to the pressure and stress they encounter. Therefore, the purpose of this study is comparing the level of depression among male and female athletes and non-athletes undergraduate student of private university in Esfahan, Iran. The participants in this research are composed of 400 male and female athletes as well as no-athletes Iranian undergraduate students. The Beck depression test (BDI was employed to measure the degree of depression. T-test was used to evaluate the distinction between athletes and non-athletes at P≤0.05. The ANOVA was conducted to examine whether there was a relationship between level of depression among non-athletes and athletes. The result showed that the prevalence rate of depression among non-athlete male undergraduate students is significantly higher than that of athlete male students. The results also presented that level of depression among female students is much more frequent compared to males. This can be due to the fatigue and lack of energy that are more frequent among female in comparison to the male students. Physical activity was negatively related to the level of depression by severity among male and female undergraduate students. However, there is no distinct relationship between physical activity and level of depression according to the age of athlete and nonathlete male and female undergraduate students. This study has essential implications for clinical psychology due to the relationship between physical activity and prevalence of depression.

  19. Impact of exposure to conflict, tsunami and mental disorders on school absenteeism: findings from a national sample of Sri Lankan children aged 12–17 years

    Science.gov (United States)

    2013-01-01

    Background Armed conflicts and natural disasters are common. Millions of people, including children are killed, injured, disabled and displaced as a result. The effects of conflict and natural disaster on mental health, especially of children are well established but effects on education have received less attention. This study investigated associations between conflict and/or tsunami exposure in Sri Lanka and their associations with absenteeism in a national sample of school children. Methods A cross-sectional survey was conducted in 2006–7 among 1,505 randomly selected school children aged 12–17 years attending government schools in 17 districts. The hypotheses were that absenteeism would be more common in children previously affected by conflict or the 2004 tsunami and that at least part of this effect would be accounted for by mental disorders. Survey information included socio-demographic, conflict and tsunami exposure, mental health status (Strengths and Difficulties Questionnaire) and information on absenteeism (defined as 20% or greater non-attendance over one year). Results The total sample of consisted of 1,505 students aged 12–17 years with a mean age of 13.7 years. 120 children reported at least one conflict exposure and 65 reported at least one tsunami exposure while only 15 reported exposure to both conflict and tsunami. Prevalence of emotional disorder caseness was 2.7%, conduct disorder caseness 5.8%, hyperactivity disorder caseness 0.6%, and 8.5% were identified as having any psychiatric disorder. Absenteeism was present in 26.8%. Overall, previous exposure to tsunami (OR 2.29 95% CI 1.36-3.84) was significantly associated with absenteeism whereas exposure to conflict was not (OR 1.32 95% CI 0.88-1.97), although some specific conflict-related exposures were significant risk factors. Mental disorder was strongly associated with absenteeism but did not account for its association with tsunami or conflict exposure. Conclusions Exposure to

  20. Student Ideas About Cosmological Concepts: Age, Expansion, and the Big Bang

    Science.gov (United States)

    Trouille, Laura; Coble, K.; Camarillo, C.; Bailey, J.; Nickerson, M.; Cochran, G.; Hayes, V.; McLin, K.; Cominsky, L.

    2012-05-01

    Students enter introductory astronomy classes with ideas about the universe that are often misaligned with accepted scientific beliefs. In this presentation we will describe the results from a multi-semester study of urban minority students’ ideas in an introductory astronomy course. We use in-depth student interviews, homework assignments, lab responses, and exams to identify pre-instructional ideas. We also examine the resilience of alternate conceptions to modification through instruction. In this presentation we focus on students’ ideas with regards to the Big Bang, the age of the Universe, and the expansion of the Universe over time. We find that a significant fraction of students enter our astronomy courses with alternate conceptions, including that the Big Bang refers to an explosion from a small, single point in space, that there is no evidence for the Big Bang, that there is a center to our Universe, that the Universe expands into pre-existing matter, and that the Universe has either a much smaller or much larger age than its accepted age. Some of these alternate conceptions are relatively easy to overcome through active learning (for example, whether there is a center to the Universe), while others are more resistant to change (for example, whether the Universe expands into pre-existing matter). Also see our presentations on student ideas of structure and distances (Camarillo et al.) as well as the overview of our methodology (Coble et al.). This work was supported by NASA ROSES E/PO Grant #NNX1OAC89G, as well as by the Illinois Space Grant Consortium and National Science Foundation CCLI Grant #0632563 at Chicago State University and the Fermi E/PO program at Sonoma State University.

  1. An Examination of Dropout Rates for Hispanic or Latino Students Enrolled in Online K-12 Schools

    Science.gov (United States)

    Corry, Michael; Dardick, William; Stella, Julie

    2017-01-01

    As the number of online K-12 educational offerings continues to grow it is important to better understand key indicators of success for students enrolled in these classes. One of those indicators is student dropout rates. This is particularly important for Hispanic or Latino students who traditionally have high dropout rates. The purpose of this…

  2. Laboratory rotational spectrum of singly 13C-substituted dimethyl ether up to 1.5 THz and interstellar detection of 13CH_3O12CH_3 - a fruitful interplay between laboratory work and inter

    Science.gov (United States)

    Koerber, M.; Bisschop, S.; Endres, C.; Lewen, F.; Schlemmer, S.

    2011-05-01

    Dimethyl ether (CH_3OCH_3) is found in high abundance in star forming regions. However, the interstellar formation process of dimethyl ether still remains unclear up to now. In current gas-grain models gas-phase synthesis via self-methylation of methanol evaporating from grains is discussed in contrast to the surface reaction of CH_3 with successively hydrogenated CO (Garrod & Herbst 2006). An observational test for the formation mechanism has been proposed by Charnley et al. (2004) making use of the 13C fractionation into CO at low temperatures on grains: Comparing the 12C/13C ratio of molecules to the 12CO/13CO ratio allows to distinguish between formation from CO on cold grains and pure gas-phase formation routes. The isotopic ratio of species like dimethyl ether thus can be used as a tracer of the chemical evolution of the observed region. Due to its two methyl groups undergoing large amplitude motions and a relatively strong dipole moment of μ = 1.302 D it shows a strong and dense complex spectrum all over the terahertz region relevant for Herschel and ALMA observations. Accurate transition frequencies are needed to interpret the astronomical spectra. For the main isotopologue extensive data are now available (Endres et al. 2009). However, due to the greatly improved sensitivity of the new observatories isotopic species of abundant molecules like dimethyl ether are appearing in the spectra as well. In this work we present laboratory measurements of singly 13C-substituted dimethyl ether (13CH_3O12CH_3) up to 1.5 THz. More than 1700 transitions of 13CH_3O12CH_3 with rotational quantum numbers up to J = 53 and K = 25 have been analyzed. Based on the laboratory measurements singly 13C-substituted dimethyl ether has been detected for the first time in the spectrum of G327.3-0.6 (Bisschop et al. in prep.) and a preliminary value for the 12C/13C abundance ratio has been determined.

  3. Predicting the Motivation in College-Aged Learning Disabled Students Based on the Academic Motivation Scale

    Science.gov (United States)

    Luna, Alberto D.

    2013-01-01

    Given the paucity of research on factors associated with motivation in learning disabled college students, the present study investigated the motivation levels in college students with learning disabilities. The Academic Motivation Scale (AMS) has been validated cross-nationally and across all educational age groups of students having various…

  4. Similarity in Middle School Mathematics: At the Crossroads of Geometry and Number

    Science.gov (United States)

    Cox, Dana C.

    2013-01-01

    The mathematical idea of similarity is typically taught to students across the middle school years between ages 11 and 14. In this study, students' understanding of presimilarity is examined based on a set of clinical interviews of 21 students aged 12-13 years. Students were asked to scale a series of geometric figures and were found to use a…

  5. Quantifying 12/13CH4 migration and fate following sub-surface release to an agricultural soil

    International Nuclear Information System (INIS)

    Shaw, G.; Atkinson, B.; Meredith, W.; Snape, C.; Steven, M.; Hoch, A.; Lever, D.

    2014-01-01

    Following gas generation in a Geological Disposal Facility (GDF), 14 C-containing gases could migrate through the geosphere, eventually diffusing into soils at the Earth's surface. This paper reports summary results from laboratory and field experiments to obtain information on the probable rates of a) diffusive transport and b) oxidation of 12/13 CH 4 (as a surrogate for 14 CH 4) in a typical agricultural soil in the UK. Rates of CH 4 oxidation were generally low in the field and undisturbed soil columns, though a re-packed column of homogenised topsoil oxidised ambient atmospheric CH 4 20× faster than an undisturbed soil column. In contrast to low observed rates of CH 4 oxidation, the effective diffusion of CH 4 through the soil was rapid. Isotopically labelled CH 4 injected at a depth of 45 cm in the field diffused to the surface and exited the soil over a time period ranging from 8 to 24 h. The rate of CH 4 diffusion through the soil was increased by the presence of ryegrass roots which increased soil porosity and decreased water content. δ 13 C values for laboratory column soils after labelled CH 4 injection experiments showed no sign of residual 13 C, despite the extremely high δ 13 C values of the injected 12/13 CH 4 . If laboratory observations are confirmed by measurements in field samples it can be concluded that the majority of 14 CH 4 from a GDF which enters a soil with low methanotrophic activity will be lost to the free atmosphere after diffusing rapidly through the soil column

  6. Effect of family disintegration on age at menarche

    Directory of Open Access Journals (Sweden)

    Alma Toromanović

    2015-11-01

    Full Text Available Objective. The aim of this study was to determine the effect of psychosocial factors on the age at menarche of girls in Federation of Bosnia and Herzegovina (FBH. Subjects and methods. A cross-sectional study was conducted from September 2002 to May 2003 in all Cantons of the FBH. The random stratified sample included 19.803 girls aged 9.0 to 17.5 years. Data were collected using the status quo method. Probit analysis was used to estimate median age at menarche and 95% confidence intervals. Results. The present study shows that menarche occurred significantly earlier (p<0.05 in girls from dysfunctional families (median: 12.99 years, 95% confidence interval: 12.93-13.05 than in girls who grew up in intact families (median: 13.04 years, 95% confidence interval: 13.01-13.07. Analyzing separately the impact of each of family stressors on age at menarche, we found that menarcheal age was significantly lower in girls from single-mother families, whose parents are divorced, whose one parent is died and where alcoholism in family is present than in girls from intact families. Maturation was found to be earlier in girls from dysfunctional families then in those from intact families after the influence of place of residence and sibship size was eliminated. Conclusion. From our research we can conclude that the girls from dysfunctional families reached earlier age at menarche than their peers who grew up in normal families, and that this effect did not disappear after controlling for socioeconomic variables.

  7. Effect of family disintegration on age at menarche.

    Science.gov (United States)

    Toromanović, Alma; Tahirović, Husref

    2015-01-01

    The aim of this study was to determine the effect of psychosocial factors on the age at menarche of girls in Federation of Bosnia and Herzegovina (FBH). A cross-sectional study was conducted from September 2002 to May 2003 in all Cantons of the FBH. The random stratified sample included 19.803 girls aged 9.0 to 17.5 years. Data were collected using the status quo method. Probit analysis was used to estimate median age at menarche and 95% confidence intervals. The present study shows that menarche occurred significantly earlier (pfamilies (median: 12.99 years, 95% confidence interval: 12.93-13.05) than in girls who grew up in intact families (median: 13.04 years, 95% confidence interval: 13.01-13.07). Analyzing separately the impact of each of family stressors on age at menarche, we found that menarcheal age was significantly lower in girls from single-mother families, whose parents are divorced, whose one parent is died and where alcoholism in family is present than in girls from intact families. Maturation was found to be earlier in girls from dysfunctional families then in those from intact families after the influence of place of residence and sibship size was eliminated. From our research we can conclude that the girls from dysfunctional families reached earlier age at menarche than their peers who grew up in normal families, and that this effect did not disappear after controlling for socioeconomic variables. Copyright © 2015 by Academy of Sciences and Arts of Bosnia and Herzegovina.

  8. C-MORE Science Kits: Putting Technology in the Hands of K-12 Teachers and Students

    Science.gov (United States)

    Achilles, K.; Weersing, K.; Daniels, C.; Puniwai, N.; Matsuzaki, J.; Bruno, B. C.

    2008-12-01

    The Center for Microbial Oceanography: Research and Education (C-MORE) is a NSF Science and Technology Center based at the University of Hawaii. The C-MORE education and outreach program offers a variety of resources and professional development opportunities for science educators, including online resources, participation in oceanography research cruises, teacher-training workshops, mini-grants to incorporate microbial oceanography-related content and activities into their classroom and, most recently, C- MORE science kits. C-MORE science kits provide hands-on classroom, field, and laboratory activities related to microbial oceanography for K-12 students. Each kit comes with complete materials and instructions, and is available free of charge to Hawaii's public school teachers. Several kits are available nationwide. C-MORE science kits cover a range of topics and technologies and are targeted at various grade levels. Here is a sampling of some available kits: 1) Marine Murder Mystery: The Case of the Missing Zooxanthellae. Students learn about the effect of climate change and other environmental threats on coral reef destruction through a murder-mystery experience. Participants also learn how to use DNA to identify a suspect. Grades levels: 3-8. 2) Statistical sampling. Students learn basic statistics through an exercise in random sampling, with applications to microbial oceanography. The laptops provided with this kit enable students to enter, analyze, and graph their data using EXCEL. Grades levels: 6-12. 3) Chlorophyll Lab. A research-quality fluorometer is used to measure the chlorophyll content in marine and freshwater systems. This enables students to compare biomass concentrations in samples collected from various locations. Grades levels: 9-12. 4) Conductivity-Temperature-Depth (CTD). Students predict how certain variables (e.g., temperature, pressure, chlorophyll, oxygen) vary with depth. A CTD, attached to a laptop computer, is deployed into deep water

  9. MR imaging of capitellar ossification: a study in children of different ages

    International Nuclear Information System (INIS)

    Fader, Lauren M.; Laor, Tal; Eismann, Emily A.; Cornwall, Roger; Little, Kevin J.

    2014-01-01

    The capitellar ossification center is used routinely to evaluate elbow alignment on radiography. However, whether capitellar ossification is central and concentric to support this practice is unknown. To define the pattern of capitellar ossification at different ages of childhood. This HIPAA-compliant study was IRB approved. MR imaging examinations from 81 children (ages 1-13 years, at least 3 boys and 3 girls in each age group) were included. We determined the center points of the ossified capitellum and the cartilaginous capitellum on the sagittal and coronal sequences that best showed differentiation between cartilage and bone. Percentage offset of the center of the ossified capitellum from the center of the cartilaginous capitellum was calculated in anterior-posterior, proximal-distal and medial-lateral dimensions, and compared across age groups and between genders. Linear regressions were used to ascertain the effect of age on percentage offset for all patients and for each gender. Capitellar ossification begins eccentrically with sagittal anterior proximal offset and coronal medial offset. With age, ossification proceeds posteriorly, distally and laterally. Percentage offset gradually diminishes with age. The ossified capitellum centralizes in the sagittal plane by 12-13 years. In the coronal plane, the capitellum ossifies medially beyond the proximal radioulnar joint and remains eccentric at 12-13 years. Centralization in boys lags in the anterior-posterior dimension. Capitellar ossification is an eccentric process, with lag in anterior-posterior centralization in boys. Medial offset persists at 12-13 years. Recognition of this eccentric ossification may allow for more accurate assessment of elbow alignment on radiographs, especially in younger children. (orig.)

  10. MR imaging of capitellar ossification: a study in children of different ages

    Energy Technology Data Exchange (ETDEWEB)

    Fader, Lauren M. [University of Cincinnati College of Medicine, Cincinnati, OH (United States); Laor, Tal [Cincinnati Children' s Hospital Medical Center, Department of Radiology, Cincinnati, OH (United States); Eismann, Emily A.; Cornwall, Roger; Little, Kevin J. [Cincinnati Children' s Hospital Medical Center, Division of Orthopaedic Surgery, Cincinnati, OH (United States)

    2014-08-15

    The capitellar ossification center is used routinely to evaluate elbow alignment on radiography. However, whether capitellar ossification is central and concentric to support this practice is unknown. To define the pattern of capitellar ossification at different ages of childhood. This HIPAA-compliant study was IRB approved. MR imaging examinations from 81 children (ages 1-13 years, at least 3 boys and 3 girls in each age group) were included. We determined the center points of the ossified capitellum and the cartilaginous capitellum on the sagittal and coronal sequences that best showed differentiation between cartilage and bone. Percentage offset of the center of the ossified capitellum from the center of the cartilaginous capitellum was calculated in anterior-posterior, proximal-distal and medial-lateral dimensions, and compared across age groups and between genders. Linear regressions were used to ascertain the effect of age on percentage offset for all patients and for each gender. Capitellar ossification begins eccentrically with sagittal anterior proximal offset and coronal medial offset. With age, ossification proceeds posteriorly, distally and laterally. Percentage offset gradually diminishes with age. The ossified capitellum centralizes in the sagittal plane by 12-13 years. In the coronal plane, the capitellum ossifies medially beyond the proximal radioulnar joint and remains eccentric at 12-13 years. Centralization in boys lags in the anterior-posterior dimension. Capitellar ossification is an eccentric process, with lag in anterior-posterior centralization in boys. Medial offset persists at 12-13 years. Recognition of this eccentric ossification may allow for more accurate assessment of elbow alignment on radiographs, especially in younger children. (orig.)

  11. Chiral 1,2- and 1,3-diol-functionalized chromophores as Lego building blocks for coupled structures.

    Science.gov (United States)

    Spange, Stefan; Hofmann, Katja; Walfort, Bernhard; Rüffer, Tobias; Lang, Heinrich

    2005-10-14

    Chiral nitroanilines containing 1,2- or 1,3-diol functionalities have been synthesized by nucleophilic aromatic substitution of fluoronitroanilines with 1-aminopropane-2,3-diols and 2-aminopropane-1,3-diol in the melt. X-ray structure analyses confirm retention of the configuration of the chiral center. The novel chromophores are suitable to link reversibly to various substituted arylboronic acids which allows the construction of new solvatochromic sensor molecules suitable to response to solvent and anion coordination by fluoride. The solvatochromism of the new compounds has been studied using the Kamlet-Taft LSE relationship.

  12. Secular trends in menarcheal age in India-evidence from the Indian human development survey.

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    Praveen Kumar Pathak

    Full Text Available Evidence from a number of countries in Europe and North America point towards the secular declining trend in menarcheal age with considerable spatial variations over the past two centuries. Similar trends were reported in several developing countries from Asia, Africa and Latin America. However, data corroborating any secular trend in the menarcheal age of the Indian population remained sparse and inadequately verified.We examined secular trends, regional heterogeneity and association of socioeconomic, anthropometric and contextual factors with menarcheal age among ever-married women (15-49 years in India. Using the pseudo cohort data approach, we fit multiple linear regression models to estimate secular trends in menarcheal age of 91394 ever-married women using the Indian Human Development Survey.The mean age at menarche among Indian women was 13.76 years (95 % CI: 13.75, 13.77 in 2005. It declined by three months from 13.83 years (95% CI: 13.81, 13.85 among women born prior to 1955-1964, to nearly 13.62 years (95% CI: 13.58, 13.67 among women born during late 1985-1989. However, these aggregate national figures mask extensive spatial heterogeneity as mean age at menarche varied from 15.0 years in Himachal Pradesh during 1955-1964 (95% CI: 14.89-15.11 to about 12.1 years in Assam (95% CI: 11.63-12.56 during 1985-1989.The regression analysis established a reduction of nearly one month per decade, suggesting a secular decline in age at menarche among Indian women. Notably, the menarcheal age was significantly associated with the area of residence, geographic region, linguistic groups, educational attainment, wealth status, caste and religious affiliations among Indian women.

  13. (2,3,7,8,12,13,17,18-Octaethylporphyrinato-κ4Ncobalt(II–2-nitrobenzaldehyde (1/2

    Directory of Open Access Journals (Sweden)

    Anissa Mansour

    2012-09-01

    Full Text Available The asymmetric unit of the title compound, [Co(C36H44N4]·2C7H5NO3, is composed of one half of the complex, arranged about an inversion center, and a complete 2-nitrobenzaldehyde (NBA molecule. The structure consists of columns that contain interleaved molecules of NBA and [CoII(OEP] (OEP is 2,3,7,8,12,13,17,18-octaethylporphyrin, which are stacked along the a axis. The CoII atom is involved in a π interaction with the ring of the NBA molecule with a centroid–metal distance of 3.508 (6 Å. There is an intramolecular C—H...O hydrogen bond in the NBA molecule.

  14. Impact of an Aging Simulation Game on Pharmacy Students’ Empathy for Older Adults

    Science.gov (United States)

    Kiersma, Mary E.; Yehle, Karen S.; Plake, Kimberly S.

    2015-01-01

    Objective. To evaluate changes in empathy and perceptions as well as game experiences among student pharmacists participating in an aging simulation game. Methods. First-year student pharmacists participated in an aging simulation game. Changes were measured pre/post-activity using the Kiersma-Chen Empathy Scale (KCES) and Jefferson Scale of Empathy – Health Professions Scale (JSE-HPS) for empathy and the Aging Simulation Experience Survey (ASES) for perceptions of older adults’ experiences and game experiences. Wilcoxon signed rank tests were used to determine changes. Results. One hundred fifty-six student pharmacists completed the instruments. Empathy using the KCES and JSE-HPS improved significantly. Of the 13 items in the ASES, 9 significantly improved. Conclusion. Simulation games may help students overcome challenges demonstrating empathy and positive attitudes toward elderly patients. PMID:26396274

  15. How Do K-12 Students' Manage Applications on Their Mobile Devices?

    Science.gov (United States)

    Aladjem, Ruthi; Hardof, Sharon

    2016-01-01

    Personal information management (PIM) is a research field that examines the activities by which users save, organize and retrieve personal information items. PIM is a one of the essential new literacies for learners in the 21st century. This paper reports results from a pilot study that explored PIM practices and strategies of K-12 students, on…

  16. Global Journal of Educational Research - Vol 12, No 1 (2012)

    African Journals Online (AJOL)

    Effects of Corporal Punishment on Disciplinary Control of Secondary School Students in Calabar Metropolis of Nigeria · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. EE Ekanem, AO Edet, 19-26. http://dx.doi.org/10.4314/gjedr.v12i1.3 ...

  17. Leisure Time Physical Inactivity and Sedentary Behaviour and Lifestyle Correlates among Students Aged 13–15 in the Association of Southeast Asian Nations (ASEAN) Member States, 2007–2013

    Science.gov (United States)

    Peltzer, Karl; Pengpid, Supa

    2016-01-01

    The aim of this study was to examine the relationship between self-reported leisure time physical inactivity frequency and sedentary behaviour and lifestyle correlates among school children in the Association of Southeast Asian Nations (ASEAN) region. The analysis included 30,284 school children aged 13–15 years from seven ASEAN countries that participated in the Global School-based Student Health Survey (GSHS) between 2007 and 2013. The measure asked about overall physical activity, walking or biking to school, and on time spent sitting. Overall, the prevalence of physical inactivity was 80.4%, ranging from 74.8% in Myanmar to 90.7% in Cambodia and sedentary behaviour 33.0%, ranging from 10.5% in Cambodia and Myanmar to 42.7% in Malaysia. In multivariate logistic regression, not walking or biking to school, not attending physical education classes, inadequate vegetable consumption and lack of protective factors (peer and parental or guardian support) were associated with physical inactivity, and older age (14 and 15 years old), coming from an upper middle income country, being overweight or obese, attending physical education classes, alcohol use, loneliness, peer support and lack of parental or guardian supervision were associated with sedentary behaviour. In boys, lower socioeconomic status (in the form of having experienced hunger) and coming from a low income or lower middle income country were additionally associated with physical inactivity, and in girls, higher socioeconomic status, not walking or biking to school and being bullied were additionally associated with sedentary behaviour. In conclusion, a very high prevalence of leisure physical inactivity and sedentary behaviour among school going adolescents in ASEAN was found and several factors identified that may inform physical activity promotion programmes in school-going adolescents in ASEAN. PMID:26891312

  18. Leisure Time Physical Inactivity and Sedentary Behaviour and Lifestyle Correlates among Students Aged 13–15 in the Association of Southeast Asian Nations (ASEAN Member States, 2007–2013

    Directory of Open Access Journals (Sweden)

    Karl Peltzer

    2016-02-01

    Full Text Available The aim of this study was to examine the relationship between self-reported leisure time physical inactivity frequency and sedentary behaviour and lifestyle correlates among school children in the Association of Southeast Asian Nations (ASEAN region. The analysis included 30,284 school children aged 13–15 years from seven ASEAN countries that participated in the Global School-based Student Health Survey (GSHS between 2007 and 2013. The measure asked about overall physical activity, walking or biking to school, and on time spent sitting. Overall, the prevalence of physical inactivity was 80.4%, ranging from 74.8% in Myanmar to 90.7% in Cambodia and sedentary behaviour 33.0%, ranging from 10.5% in Cambodia and Myanmar to 42.7% in Malaysia. In multivariate logistic regression, not walking or biking to school, not attending physical education classes, inadequate vegetable consumption and lack of protective factors (peer and parental or guardian support were associated with physical inactivity, and older age (14 and 15 years old, coming from an upper middle income country, being overweight or obese, attending physical education classes, alcohol use, loneliness, peer support and lack of parental or guardian supervision were associated with sedentary behaviour. In boys, lower socioeconomic status (in the form of having experienced hunger and coming from a low income or lower middle income country were additionally associated with physical inactivity, and in girls, higher socioeconomic status, not walking or biking to school and being bullied were additionally associated with sedentary behaviour. In conclusion, a very high prevalence of leisure physical inactivity and sedentary behaviour among school going adolescents in ASEAN was found and several factors identified that may inform physical activity promotion programmes in school-going adolescents in ASEAN.

  19. Influence of age, sex, and race on college students' exercise motivation of physical activity.

    Science.gov (United States)

    Egli, Trevor; Bland, Helen W; Melton, Bridget F; Czech, Daniel R

    2011-01-01

    The authors examined differences in exercise motivation between age, sex, and race for college students. Students from 156 sections of physical activity classes at a midsize university were recruited (n = 2,199; 1,081 men, 1,118 women) in 2005-2006 and volunteered to complete the Exercise Motivation Inventory. Quantitative, cross-sectional descriptive research design was employed. Significant differences were found in 3 of 14 exercise motivational subscales by age (affiliation, health pressures, and ill health avoidance) (p motivated by intrinsic factors (strength, competition, and challenge) (p motivations (p motivations in college-aged population by demographics were documented. Understanding these differences is important for college health professionals for programming strategies and promoting physical activity.

  20. EDITORIAL: Proceedings of the 12th Gravitational Wave Data Analysis Workshop (GWDAW 12), Cambridge, MA, USA, 13 16 December 2007

    Science.gov (United States)

    Hughes, S.; Katsavounidis, E.

    2008-09-01

    It was a great pleasure and an honor for us to host the 12th Gravitational Wave Data Analysis Workshop (GWDAW) at MIT and the LIGO Laboratory in Cambridge, Massachusetts, the place where this workshop series started in 1996. This time the conference was held at the conference facilities of the Royal Sonesta Hotel in Cambridge from 13 16 December, 2007. This 12th GWDAW found us with the ground interferometers having just completed their most sensitive search for gravitational waves and as they were starting their preparation to bring online and/or propose more sensitive instruments. Resonant mass detectors continued to observe the gravitational wave sky with instruments that have been operating now for many years. LISA, the Laser Interferometer Space Antenna, was recently reviewed by NASA's Beyond Einstein Program Assessment Committee (BEPAC) convened by the National Research Council (NRC) and found that 'on purely scientific grounds LISA is the mission that is the most promising and least scientifically risky…thus, the committee gave LISA its highest scientific ranking'. Even so, JDEM, the Joint Dark Energy Mission, was identified to go first, with LISA following a few years after. New methods, analysis ideas, results from the analysis of data collected by the instruments, as well as Mock Data Challenges for LISA were reported in this conference. While data from the most recent runs of the instruments are still being analyzed, the first upper limit results show how even non-detection statements can be interesting astrophysics. Beyond these traditional aspects of GWDAW though, for the first time in this workshop we tried to bring the non-gravitational wave physics and astronomy community on board in order to present, discuss and propose ways to work together as we pursue the first detection of gravitational waves and as we hope to transition to gravitational wave astronomy in the near future. Overview talks by colleagues leading observations in the electromagnetic

  1. Early Substance Use Initiation and Suicide Ideation and Attempts among School-Aged Adolescents in Four Pacific Island Countries in Oceania

    Directory of Open Access Journals (Sweden)

    Karl Peltzer

    2015-09-01

    Full Text Available This study aimed to investigate the correlations between early initiation (<12 years of smoking cigarettes, alcohol use, and drug use (cannabis with suicidal ideation and suicide attempts in school-aged adolescents in four Pacific Island countries in Oceania. The sample included 6540 adolescents (≤13 to ≥16 years old from Kiribati, Samoa, Solomon Islands, and Vanuatu. Bivariate and multivariable analyses were conducted to assess the association between pre-adolescent substance use initiation and suicidal ideation and suicide attempts. Results indicate a prevalence of 25.8% suicidal ideation in the past 12 months (ranging from 17.2% in Vanuatu to 34.7% in Kiribati and 34.9% suicide attempts in the past 12 months (ranging from 23.5% in Vanuatu to 62.0% in Samoa. The prevalence of early cigarette smoking initiation was 15.7%, early alcohol initiation 13.8%, and early drug use initiation was 12.9%. Students who reported pre-adolescent substance use initiation, compared with non-substance users, were more likely reporting suicidal ideation and suicide attempts. The concurrent initiation of cigarette smoking, alcohol, and drug use should be targeted in early prevention programmes in order to prevent possible subsequent suicidal behaviours.

  2. Students' Age Difference of Confidence in Using Technology for Learning in Higher Education

    Science.gov (United States)

    Yau, Hon Keung; Cheng, Alison Lai Fong

    2012-01-01

    Some past studies find that older students have more confidence in using technology for learning than younger students but some other studies find the opposite result. However, it is found that there are a few researches studying on the age difference in the perception of using technology for learning in Hong Kong. Therefore, the aim of the study…

  3. Relationship between sleep and mood states among student-athlete ...

    African Journals Online (AJOL)

    This study aims to examine the relationship between sleep and mood states on student-athlete. The respondent consists of 89 student-athletes from MajlisSukanNegeri, Perak. There were 53 male respondent (59.3%) and 36 female respondent (40.4%). These respondent were range from age 13 to 21 years old are chosen ...

  4. Culture and diet among Chinese American children aged 9–13 years: A qualitative study

    Science.gov (United States)

    This study examined Chinese American children's behaviors, food preferences, and cultural influences on their diet. Qualitative individual interviews were conducted with twenty-five Chinese American children aged 9-13 years in community centers and Chinese schools in Houston, TX using constructs fro...

  5. ANTHROPOMETRICAL STATUS AND GENDER DIFFERENCES AT 12 YEARS OF AGE

    Directory of Open Access Journals (Sweden)

    Ilir Gllareva

    2015-05-01

    Full Text Available The aim of this study is to verify the current anthropometrical status of the pupils of the age 12, as well as to compare it with the standards of raising in accordance with the WHO standards. In the study were included 62 pupils (42 male and 20 female. The anthropometric tests were done in height, weight, biacromial and elbow breadth, subcutaneous adipose tissue at the : suprailiac skinfold; subscapular skinfold; triceps skinfold, as well as the abdominal circumference. The results showed that there was a heterogenic distribution of results, especially in the body weight, where the distribution between the minimal and maximal results is 28-70 kg, with the average 43, 14 ± 9, 78 of standard deviation with the male pupils, while with the female pupils was noticed more homogenous group and the standard deviation was significantly lower than with the female pupils in all variables. The findings show that almost in all measured variables female pupils are more developed at this age, especially the body high, body weight and subcutaneous adipose tissue, while as regards the abdominal circumference and body breadth, the male pupils are more developed. Comparison of symbolic sample of this research with the WHO data shows an approximate trend of raising and development of children which were included in this research, and the difference is as follows: Female pupils age 12, body height=151.97 cm

  6. The Effect o f Entertaining Fun Athletics Training Program R elated To the Self - Confidence Levels among Children Aged 12 - 14 Years

    Directory of Open Access Journals (Sweden)

    Erkan YARIMKAYA

    2014-12-01

    Full Text Available The aim of this study is to examine the effect of entertaining fun athletics training program on the self - conf i dence levels of children. The sample group of the study is occuring 160 students in 12 - 14 age group from Keçiören Hacı Sabancı Primary School loc ated in Keçiören district of Ankara. Both the experimental and the control group were applied Piers - Harris Self - Confidence test developed by Piers and Harr i s (1984 before and after 8 - week procedure. The SPSS statistical program (version 15.0 was used for data analysis.The research indicates a statistical difference (P<0,05 between the experimental and the control group in terms of post - test. In the compari son of pre - test and post - test results of the experimental group, there is a significant difference between pre - test and post - test results. ( P<0,05. In those comparisons, it was found that the post - test results are higher than pre - test results. As a resul t, in the survey made for inspecting the self - confidence of the children in 12 – 14 age group who are making e ntertaining fun athletics excersises, it is fixed that the entertaining fun athletics excersise applied to the test group effects the self - confide nce level of the kids significiantly. In this context, we can say that e ntertaining fun athletics excersise positively effect the self - confidence properties of the kids in 12 - 14 age group.

  7. Sex Survey about university students of UPF (from 20 to 27 years old

    Directory of Open Access Journals (Sweden)

    Carmen Maté

    2013-08-01

    Full Text Available The purpose of the present survey was to assess the level of sexual knowledge, attitudes and practice of university students, adult young people from 20 to 27 years old and to identify if there was any significant difference in terms of age and sexual activity with other surveys. The survey was undertaken in which data were collected from 838 students who attended the third and four course of their graduate in Humanities. Differences between answers by sex were tested using Pearson’s χ2 test. The study established that behaviour, knowledge, attitudes and practice of the universitary students vary by sex in some regards. The fi rst sexual relationships is around they have 15,4 years old and no statistically significant difference was found between sex. The average of the starter interesting about sex is around 13,5 years old and a statistically signifi cant difference was found between sex, the average of boys is 12,7 years old and girls 13,7. People who were sexually active are satisfi ed and show is so important to their wellbeing. Majority use contraceptive methods in the last relationship and the same percentage use the condom in order to avoid sexually transmitted diseases. The study confirmed that there are 21% the students don’t use any method to avoid sexually transmitted diseases. Our conclusion is both, the knowledge and attitudes of students necessarily required appropriate sex education in the secondary school.

  8. A COMPARISON OF HOW STUDENT'S BODY IS MOBILIZED IN TWO GRADE LEVELS

    Directory of Open Access Journals (Sweden)

    de la Riva, María de Jesús

    2013-06-01

    Full Text Available In Mexico, basic schooling is composed of three levels: infant (or preschool education, primary (or elementary education and secondary (or middle school education, each taught at a different educational establishment. Students egressing from elementary school are (in average between 12 to 13 years-old, an age of profound changes to which the following can be added: a different educational establishment, different class mates/peers, higher organizational specialization and class work strategies which, in turn, result in a higher number of teachers. Secondary schools have harder institutional structures and higher disciplinary control, so that students seek new ways of negotiation. This article elaborates on those experiences, on how control over appearance, place and body movements influences students through spokesmen and norms, and how body control effectively 'becomes part' of daily class work. I use an ethnographic approach enriched by the categories of Actor-Network Theory (ANT, which allows visualization of the passage of students from one level to another as a network of paths and routes in tension transcending space scales and measured time. It is assumed that students will also build its action context.This paper is written in Spanish.

  9. Nuclear Landau-Zener phenomena and the fusion cross sections in the system 13C + 16O → 12C + 17O

    International Nuclear Information System (INIS)

    Imanishi, B.; Oertzen, W. von.

    1990-07-01

    Reaction mechanism of the system 13 C+ 16 O- 12 C+ 17 O is investigated with the use of the nucleon molecular-orbital model in the framework of the orthogonalized coupled-reaction-channel (OCRC) theory. The adiabatic potentials obtained are quite different from the diagonal potentials of the original OCRC basis. The Landau-Zener radial coupling explains the backward enhancement of measured differential cross sections of the transfer reaction 13 C( 16 O, 17 O) 12 C. In the OCRC calculation the fusion cross sections of the channel 13 C+ 16 O is enhanced at low bombarding energies, in agreement with the experimental data. (author)

  10. [Effect of parental feeding behavior on eating behavior of children aged 1-3 years].

    Science.gov (United States)

    Liu, Hong-Hua; Chen, Jin-Jin

    2014-06-01

    To investigate the relationship between the eating behavior of children aged 1-3 years and parental feeding behavior and the effect of family status on feeding behavior. With stratified random sampling, 2 324 children aged 1-3 years were selected from Shanghai. Questionnaires were filled out by their parents or feeders to investigate the basic family information, parental feeding behavior, the eating behavior of children, and the basic information on children. The eating behavior of children was positively correlated with eating environment (r=0.223) and parental monitoring behavior (r=0.245) but negatively correlated with parental compulsive behavior (r=-0.264) (Pparental compulsive behavior (r=-0.569) but positively correlated with parental monitoring behavior (r=0.615) and eating environment (r=0.621). The emotional undereating of children was positively correlated with parental emotional feeding (r=0.259) and parental compulsive behavior (r=0.279). Parental monitoring behavior showed significant differences between different families (PParental feeding behavior is closely related to the eating behavior of children. Parental feeding behavior may vary across different family status.

  11. Alcohol, tobacco and cannabis use: Do students with mild-intellectual disability mimic students in the general population?

    Science.gov (United States)

    Pacoricona Alfaro, Dibia Liz; Ehlinger, Virginie; Spilka, Stanislas; Ross, Jim; Sentenac, Mariane; Godeau, Emmanuelle

    2017-04-01

    Education policies encourage inclusion of students with mild-intellectual disability (mild-ID) in community/school life. However, such policies potentially increase exposure to substance use. This article examines tobacco, alcohol and cannabis use among French students enrolled in special units for students with disabilities (ULIS) at mainstream junior high schools compared to those of general population of the equivalent age; and explores factors associated with substance use among ULIS students, known to present mostly mild-ID. In 2014, a questionnaire adapted from the international HBSC/WHO study was administered to 700 ULIS students (mean-age 14.2). Comparative data were gathered from 7023 junior high-school students (mean-age 13.6) in the general population. Among students <14 years-old, tobacco and alcohol use rates were similar between ULIS and general population. For students ≥14, alcohol use remained comparable, while tobacco and cannabis use were higher in general population. Among ULIS students, low perceived health/life satisfaction, divorced/separated parents and high perceived academic demands were associated with tobacco use. Bullying, not liking school very much and attending schools outside a deprived area were associated with alcohol use. Having had sexual intercourse and not perceiving one's health as excellent were associated with cannabis use. Having dated was associated with using all three substances. Copyright © 2016 Elsevier Ltd. All rights reserved.

  12. Characteristic Processes in Close Peer Friendships of Preterm Infants at Age 12

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    Mary C. Sullivan

    2012-01-01

    Full Text Available Close friendships become important at middle-school age and are unexplored in adolescents born prematurely. The study aimed to characterize friendship behaviors of formerly preterm infants at age 12 and explore similarities and differences between preterm and full-term peers on dyadic friendship types. From the full sample of N=186, one hundred sixty-six 12-year-old adolescents (40 born full term, 126 born preterm invited a close friend to a 1.5 hour videotaped laboratory play session. Twenty adolescents were unable to participate due to scheduling conflicts or developmental disability. Characteristic friendship behaviors were identified by Q-sort followed by Q-factoring analysis. Friendship duration, age, and contact differed between the full-term and preterm groups but friendship activities, behaviors, and quality were similar despite school service use. Three Q-factors, leadership, distancing, and mutual playfulness, were most characteristic of all dyads, regardless of prematurity. These prospective, longitudinal findings demonstrate diminished prematurity effects at adolescence in peer friendship behavior and reveal interpersonal dyadic processes that are important to peer group affiliation and other areas of competence.

  13. NH3-SCR on Cu, Fe and Cu + Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects

    International Nuclear Information System (INIS)

    Wang, Aiyong; Wang, Yilin; Walter, Eric D.; Washton, Nancy M.

    2017-01-01

    Cu, Fe and Cu + Fe ion exchanged Beta and SSZ-13 catalysts were prepared by solution ion exchange using commercial NH 4 /Beta, and NH 4 /SSZ-13 that was prepared in-house. To study hydrothermal aging effects, Beta supported catalysts were aged hydrothermally at 700 °C and SSZ-13 supported catalysts were aged at 750 °C. In order to reveal the effects of Fe addition in the co-exchanged catalysts, these catalysts were characterized by means of powder X-ray diffraction (XRD), N 2 adsorption-desorption, electron paramagnetic resonance (EPR), 27 Al-nuclear magnetic resonance ( 27 Al-NMR) and propylene coking followed with temperature programmed reaction (TPR), and further tested with standard NH 3 -SCR with and without the presence of propylene. Collectively, the catalyst characterizations and reaction testing indicated minor beneficial effects of Fe addition in Cu,Fe/Beta, where NH 3 -SCR activity, N 2 selectivity and hydrothermal stability were all slightly improved. In contrast, Fe addition did not show apparent beneficial effects in low-temperature SCR for the Cu,Fe/SSZ-13 case. In conclusion, at elevated reaction temperatures, however, the presence of Fe indeed considerably improved NO conversion and N 2 selectivity for the hydrothermally aged Cu,Fe/SSZ-13 catalyst in the presence of propylene.

  14. Influence of the structure and content of physical training tourists-conductors 1213 years on the level of physical fitness

    Directory of Open Access Journals (Sweden)

    Olena Horbonos-Andronova

    2015-12-01

    Full Text Available Purpose: to determine the effect of the structure and content of physical training tourists-conductors 1213 years on the level of physical fitness. Results: significant differences in the level of development of basic motor qualities tourists conductors between the experimental and control groups. Material and Methods: the used theoretical analysis and synthesis of the literature, teacher testing, methods of mathematical statistics. The study involved 90 people, 64 of them – men and 26 – women. Conclusions: determined that the overall level of physical qualities tourists conductors is low; no single structure building training process of preparation tourists conductors 1213 years; no innovative technologies; narrow range of physical training of athletes. Established that additional means of physical training significantly affect the level of physical qualities tourists conductors 1213 years at a stage of previous base preparation

  15. Protective Effect of Human Leukocyte Antigen (HLA Allele DRB1*13:02 on Age-Related Brain Gray Matter Volume Reduction in Healthy Women

    Directory of Open Access Journals (Sweden)

    Lisa M. James

    2018-03-01

    Full Text Available Background: Reduction of brain volume (brain atrophy during healthy brain aging is well documented and dependent on genetic, lifestyle and environmental factors. Here we investigated the possible dependence of brain gray matter volume reduction in the absence of the Human Leukocyte Antigen (HLA allele DRB1*13:02 which prevents brain atrophy in Gulf War Illness (James et al., 2017. Methods: Seventy-one cognitively healthy women (32–69 years old underwent a structural Magnetic Resonance Imaging (sMRI scan to measure the volumes of total gray matter, cerebrocortical gray matter, and subcortical gray matter. Participants were assigned to two groups, depending on whether they lacked the DRB1*13:02 allele (No DRB1*13:02 group, N = 60 or carried the DRB1*13:02 allele (N = 11. We assessed the change of brain gray matter volume with age in each group by performing a linear regression where the brain volume (adjusted for total intracranial volume was the dependent variable and age was the independent variable. Findings: In the No DRB1*13:02 group, the volumes of total gray matter, cerebrocortical gray matter, and subcortical gray matter were reduced highly significantly. In contrast, none of these volumes showed a statistically significant reduction with age in the DRB1*13:02 group. Interpretation: These findings document the protective effect of DRB1*13:02 on age-dependent reduction of brain gray matter in healthy individuals. Since the role of this allele is to connect to matching epitopes of external antigens for the subsequent production of antibodies and elimination of the offending antigen, we hypothesize that its protective effect may be due to the successful elimination of such antigens to which we are exposed during the lifespan, antigens that otherwise would persist causing gradual brain atrophy. In addition, we consider a possible beneficial role of DRB1*13:02 attributed to its binding to cathepsin S, a known harmful substance in brain

  16. Residents with mild cognitive decline and family members report health students 'enhance capacity of care' and bring 'a new breath of life' in two aged care facilities in Tasmania.

    Science.gov (United States)

    Elliott, Kate-Ellen J; Annear, Michael J; Bell, Erica J; Palmer, Andrew J; Robinson, Andrew L

    2015-12-01

    Care provided by student doctors and nurses is well received by patients in hospital and primary care settings. Whether the same is true for aged care residents of nursing homes with mild cognitive decline and their family members is unknown. To investigate the perspectives of aged care residents with mild cognitive decline and their family members on interdisciplinary student placements in two residential aged care facilities (RACF) in Tasmania. A mixed methods design was employed with both qualitative and quantitative data collected. All participants were interviewed and completed a questionnaire on residents' quality of life, during or after a period of student placements in each facility (October-November, 2012). Qualitative data were coded for themes following a grounded theory approach, and quantitative data were analysed using SPSS. Twenty-one participants (13 residents and 8 family members) were recruited. Four themes were identified from the qualitative data and included (i) increased social interaction and facility vibrancy; (ii) community service and personal development, (iii) vulnerability and sensitivity (learning to care) and (iv) increased capacity and the confidence of enhanced care. Residents' quality of life was reported to be mostly good in the presence of the students, despite their high care needs. Residents with mild cognitive decline and their family members perceive a wide array of benefits of student provided care in RACFs including increased social interaction. Future quantitative research should focus on whether changes in care occur for residents as a result of student involvement. © 2014 The Authors Health Expectations Published by John Wiley & Sons Ltd.

  17. Determinants of health-related quality of life in international graduate students.

    Science.gov (United States)

    Ogunsanya, Motolani E; Bamgbade, Benita A; Thach, Andrew V; Sudhapalli, Poojee; Rascati, Karen L

    2018-04-01

    International graduate students often experience additional levels of stress due to acculturation. Given the impact of stress on health outcomes (both physical and mental), this study examined the health-related quality of life (HRQoL) in international graduate students to determine its association with acculturative stress, perceived stress, and use of coping mechanisms. A cross-sectional, self-administered survey was designed and sent to 38 student chapters within the International Society for Pharmacoeconomics and Outcomes Research (ISPOR) student network. HRQoL [physical component summary (PCS) and mental component summary (MCS)] was measured using the 12-item Short Form (SF-12) while coping mechanisms were assessed using the Brief COPE Scale. Acculturative and perceived stress were assessed using the Acculturative Stress Scale for International students [ASSIS] and Graduate Stress Inventory-Revised (GSI-R), respectively. Demographic and personal information (e.g. age, religion) were also collected. Descriptive statistics (mean ± SD and frequency) and hierarchical multiple regression analysis were conducted. The average PCS and MCS were 60 ± 9 and 44 ± 13, respectively, indicating that while the physical health was above the United States (US) general population norm (50), mental health scores were lower. Findings from the hierarchical multiple regression showed that perceived and acculturative stress significantly predicted mental health. Acculturative stress was also a significant predictor of physical health. The results from this study support the hypothesis that international students in the US experience both perceived and acculturative stress that significantly impacts their HRQoL. Universities should consider providing education on stress reduction techniques to improve the health of international graduate students. Copyright © 2018 Elsevier Inc. All rights reserved.

  18. The relationship of gross upper and lower limb motor competence to measures of health and fitness in adolescents aged 13–14 years

    Science.gov (United States)

    Liu, Francesca; Mahmoud, Wala; Metz, Renske; Beunder, Kyle; Delextrat, Anne; Morris, Martyn G; Esser, Patrick; Collett, Johnny; Meaney, Andy; Howells, Ken; Dawes, Helen

    2018-01-01

    Introduction Motor competence (MC) is an important factor in the development of health and fitness in adolescence. Aims This cross-sectional study aims to explore the distribution of MC across school students aged 13–14 years old and the extent of the relationship of MC to measures of health and fitness across genders. Methods A total of 718 participants were tested from three different schools in the UK, 311 girls and 407 boys (aged 13–14 years), pairwise deletion for correlation variables reduced this to 555 (245 girls, 310 boys). Assessments consisted of body mass index, aerobic capacity, anaerobic power, and upper limb and lower limb MC. The distribution of MC and the strength of the relationships between MC and health/fitness measures were explored. Results Girls performed lower for MC and health/fitness measures compared with boys. Both measures of MC showed a normal distribution and a significant linear relationship of MC to all health and fitness measures for boys, girls and combined genders. A stronger relationship was reported for upper limb MC and aerobic capacity when compared with lower limb MC and aerobic capacity in boys (t=−2.21, degrees of freedom=307, P=0.03, 95% CI −0.253 to –0.011). Conclusion Normally distributed measures of upper and lower limb MC are linearly related to health and fitness measures in adolescents in a UK sample. Trial registration number NCT02517333. PMID:29629179

  19. Victimization, Suicidal Ideation, and Alcohol Use From Age 13 to 15 Years: Support for the Self-Medication Model.

    Science.gov (United States)

    Marschall-Lévesque, Shawn; Castellanos-Ryan, Natalie; Parent, Sophie; Renaud, Johanne; Vitaro, Frank; Boivin, Michel; Tremblay, Richard E; Séguin, Jean R

    2017-04-01

    Recent years have seen increased coverage of adolescent victimization and suicide. Both adolescent peer victimization and substance use have been associated with suicidal ideation, with evidence suggesting that all three factors are interrelated. There are at least four models which can explain the associations between these factors (i.e., self-medication, secondary mental disorder, bidirectional, and common factor). However, none of them is being empirically supported as the dominant model because few longitudinal studies have explored the association between these factors. The present study compared longitudinal paths of all four models simultaneously using a cross-lagged model. This was done using self-reported measures of peer victimization, suicidal ideation, and alcohol use at age 13, 14, and 15 years in a longitudinal sample of 238 adolescents. All three variables were moderately stable across time. Significant cross-lagged associations were found, showing that frequent peer victimization at age 13 years was associated with higher odds of having suicidal ideation at age 14 years (odds ratio, 1.82; p suicidal ideation at age 14 years was significantly associated with higher alcohol use frequency at age 15 years (β = .13; p suicidal ideation and alcohol use over 1 year, supporting the self-medication model. Clarifying the empirical basis of these underlying models could allow for earlier prevention strategies, by targeting the risk factor that appears the earliest in the model. Copyright © 2016 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

  20. Provisional PDF Published 12 February 2010 Research article ...

    African Journals Online (AJOL)

    cqq1a

    2010-02-12

    Feb 12, 2010 ... A monocularly blind person is at high risk of being bilaterally blind. ... The majority of the patients were public servants and students constituting ... Monocular blindness is a common ocular problem which affects all ages ... refractive errors were automatically excluded. .... Port Harcourt Medical Journal 2007;.

  1. SUMMER STUDENT LECTURE PROGRAMME

    CERN Multimedia

    Françoise Benz

    2002-01-01

    Main Auditorium, bldg. 500   DATE TIME LECTURER TITLE Monday 5 August 09:15-10:00 F. GIANOTTI LHC Physics (1/3) 10:15-12:00 T. NAKADA CP Violation (3&4/4) Tuesday 6 August 09:15-10:00 F. GIANOTTI LHC Physics (2/3) 10:15-11:00 R. JACOBSEN From Raw Data to Physics Results (1/3) 11:15-12:00 R. JACOBSEN / T. NAKADA Discussion Session Wednesday 7 August 09:15-10:00 F. GIANOTTI LHC Physics (3/3) 10:15-11:00 R. JACOBSEN From Raw Data to Physics Results (2/3) 11:15-12:00 J. LESGOURDES Cosmology (1/4) 14:00-16:00 C. BENVENUTI Basic Science, Society, and Technological Innovation (Council Chamber, bldg. 503) Thursday 8 August 09:15-10:00 J. LESGOURDES Cosmology (2/4) 10:15-11:00 R. JACOBSEN From Raw Data to Physics Results (3/3) 11:15-12:00 J. CARR / J. LESGOURDES Discussion Session Friday 9 August 09:15-11:00 J. LESGOURDES Cosmology (3&4/4) 11:15-12:00 C. JARLSKOG Historic Lecture 14:00-16:00 Course Review Monday 12 August 09:15-12:00 Students Sessi...

  2. Antipain and 12-O-tetradecanoyl-phorbol-13-acetate

    International Nuclear Information System (INIS)

    Fujiwara, Y.; Tatsumi, M.

    1980-01-01

    Antipain (AP) and 12-O-tetradecanoyl-phorbooe-13-acetate (TPA) were tested in V79 Chinese hamster cells for cytotoxicity and effects on survival and 6-thioguanine-resistant (6TGsup(r)) mutation after UV-irradiation. AP and/or TPA were relatively non-cytotoxic and had no significant effects on UV survival. Despite their non-mutagenicity, the recovery of UV-induced 6TGsup(r) colonies was significantly enhanced by the pretreatment with either AP (0,5-2 mM) or TPA (0.1-1 μg/ml) only during the expression period before the 6TG selection at a low density of cells in the absence of AP or TPA. Such enhancing effects were maximal when AP or TPA was present during the late expression period after the mutation fixation and extensive dilution of DNA lesions. Reconstruction experiments revelaed the antgonisitc actions that TPA and AP tended to eliminate and increase, respectively, the metabolic co-operation. In the TPA-plus-AP treatment, AP abolished the TPA-enhanced recovery of induced mutants. Thus, it seems that TPA increases the mutant recovery langely through decreased metabolic co-operation and AP could modulate the mutation expression. Further, an error-prone inducible repair may not exist or, if it exists, AP may not inhibit it in V79 Chinese hamster cells. (orig.)

  3. Maximisation of the ratio of microhardness to the Young's modulus of Ti–12Mo–13Nb alloy through microstructure changes

    Energy Technology Data Exchange (ETDEWEB)

    Gabriel, Sinara B., E-mail: sinara@metalmat.ufrj.br [Universidade Federal do Rio de Janeiro, Departamento de Engenharia Metalúrgica e de Materiais, C.P. 68505, Rio de Janeiro, RJ 21945-970 (Brazil); Centro Universitário de Volta Redonda, Volta Redonda, RJ (Brazil); Almeida, Luiz H. de [Universidade Federal do Rio de Janeiro, Departamento de Engenharia Metalúrgica e de Materiais, C.P. 68505, Rio de Janeiro, RJ 21945-970 (Brazil); Nunes, Carlos A. [Universidade de São Paulo, Departamento de Engenharia de Materiais, C.P. 116, Lorena, SP 12.600-970 (Brazil); Dille, Jean [Université Libre de Bruxelles, Chemical and Materials Department, Av. F. Roosevelt 50, C. P. 194/03, Brussels (Belgium); Soares, Glória A. [Universidade Federal do Rio de Janeiro, Departamento de Engenharia Metalúrgica e de Materiais, C.P. 68505, Rio de Janeiro, RJ 21945-970 (Brazil)

    2013-08-01

    Alloys for orthopaedic and dentistry applications require high mechanical strength and a low Young's modulus to avoid stress shielding. Metastable β titanium alloys appear to fulfil these requirements. This study investigated the correlation of phases precipitated in a Ti–12Mo–13Nb alloy with changes in hardness and the Young's modulus. The alloy was produced by arc melting under an argon atmosphere, after which, it was heat treated and cold forged. Two different routes of heat treatment were employed. Phase transformations were studied by employing X-ray diffraction and transmission electron microscopy. Property characterisation was based on Vickers microhardness tests and Young's modulus measurements. The highest ratio of microhardness to the Young's modulus was obtained using thermomechanical treatment, which consists of heating at 1000 °C for 24 h, water quenching, cold forging to reduce 80% of the area, and ageing at 500 °C for 24 h, where the final microstructure consisted of an α phase dispersed in a β matrix. The α phase appeared in two different forms: as fine lamellas (with 240 ± 100 nm length) and massive particles of 200–500 nm size. - Highlights: • The work presents microstructure change and properties of Ti–12Mo–13Nb alloy. • The better condition was achieved by the α phase distributed in the β matrix. • The values obtained were higher than of the Ti–6Al–4V alloy and cp Ti.

  4. Bayesian chronological analyses consistent with synchronous age of 12,835-12,735 Cal B.P. for Younger Dryas boundary on four continents.

    Science.gov (United States)

    Kennett, James P; Kennett, Douglas J; Culleton, Brendan J; Aura Tortosa, J Emili; Bischoff, James L; Bunch, Ted E; Daniel, I Randolph; Erlandson, Jon M; Ferraro, David; Firestone, Richard B; Goodyear, Albert C; Israde-Alcántara, Isabel; Johnson, John R; Jordá Pardo, Jesús F; Kimbel, David R; LeCompte, Malcolm A; Lopinot, Neal H; Mahaney, William C; Moore, Andrew M T; Moore, Christopher R; Ray, Jack H; Stafford, Thomas W; Tankersley, Kenneth Barnett; Wittke, James H; Wolbach, Wendy S; West, Allen

    2015-08-11

    The Younger Dryas impact hypothesis posits that a cosmic impact across much of the Northern Hemisphere deposited the Younger Dryas boundary (YDB) layer, containing peak abundances in a variable assemblage of proxies, including magnetic and glassy impact-related spherules, high-temperature minerals and melt glass, nanodiamonds, carbon spherules, aciniform carbon, platinum, and osmium. Bayesian chronological modeling was applied to 354 dates from 23 stratigraphic sections in 12 countries on four continents to establish a modeled YDB age range for this event of 12,835-12,735 Cal B.P. at 95% probability. This range overlaps that of a peak in extraterrestrial platinum in the Greenland Ice Sheet and of the earliest age of the Younger Dryas climate episode in six proxy records, suggesting a causal connection between the YDB impact event and the Younger Dryas. Two statistical tests indicate that both modeled and unmodeled ages in the 30 records are consistent with synchronous deposition of the YDB layer within the limits of dating uncertainty (∼ 100 y). The widespread distribution of the YDB layer suggests that it may serve as a datum layer.

  5. Attitudes of Veterinary Teaching Staff and Exposure of Veterinary Students to Early-Age Desexing, with Review of Current Early-Age Desexing Literature.

    Science.gov (United States)

    Jupe, Alannah; Rand, Jacquie; Morton, John; Fleming, Sophie

    2017-12-25

    Approximately 50% of cats admitted to Australian shelters are kittens, and 26% of dogs are puppies, and, particularly for cats, euthanasia rates are often high. Cats can be pregnant by 4 months of age, yet the traditional desexing age is 5-6 months, and studies in Australasia and Nth America reveal that only a minority of veterinarians routinely perform early age desexing (EAD) of cats or dogs, suggesting they are not graduating with these skills. This study aimed to describe the attitudes of veterinary teaching staff in Australian and New Zealand universities towards EAD, and to determine if these changed from 2008 to 2015. It also aimed to identify students' practical exposure to EAD. Most (64%) of the 25 participants in 2015 did not advocate EAD in their teaching and, in their personal opinion, only 32% advocated it for cats. Concerns related to EAD cited by staff included anesthetic risk, orthopedic problems, hypoglycemia, and, in female dogs, urinary incontinence. Those who advocated EAD cited benefits of population control, ease of surgery and behavioral benefits. Only three of the eight universities provided a majority of students with an opportunity to gain exposure to EAD procedures before graduation, and in two of these, most students had an opportunity to perform EAD. In conclusion, most veterinary students in Australia and New Zealand are not graduating with the knowledge or skills to perform EAD, and have little opportunity while at university to gain practical exposure. Welfare agencies could partner with universities to enable students to experience EAD.

  6. Change in HbA1c Levels between the Age of 8 Years and the Age of 12 Years in Dutch Children without Diabetes: The PIAMA Birth Cohort Study

    Science.gov (United States)

    Jansen, Hanneke; Wijga, Alet H.; Scholtens, Salome; Koppelman, Gerard H.; Postma, Dirkje S.; Brunekreef, Bert; de Jongste, Johan C.; Smit, Henriëtte A.; Stolk, Ronald P.

    2015-01-01

    Objective HbA1c is associated with cardiovascular risk in persons without diabetes and cardiovascular risk accumulates over the life course. Therefore, insight in factors determining HbA1c from childhood onwards is important. We investigated (lifestyle) determinants of HbA1c at age 12 years and the effects of growth on change in HbA1c and the tracking of HbA1c between the age of 8 and 12 years. Study Design and Methods Anthropometric measurements were taken and HbA1c levels were assessed in 955 children without diabetes aged around 12 years participating in the PIAMA birth cohort study. In 363 of these children HbA1c was also measured at age 8 years. Data on parents and children were collected prospectively by questionnaires. Results We found no significant association between known risk factors for diabetes and HbA1c at age 12 years. Mean(SD) change in HbA1c between ages 8 and 12 years was 0.6(0.7) mmol/mol per year (or 0.1(0.1) %/yr). Anthropometric measures at age 8 and their change between age 8 and 12 years were not associated with the change in HbA1c. 68.9% of the children remained in the same quintile or had an HbA1c one quintile higher or lower at age 8 years compared to age 12 years. Conclusion The lack of association between known risk factors for diabetes and HbA1c suggest that HbA1c in children without diabetes is relatively unaffected by factors associated with glycaemia. HbA1c at age 8 years is by far the most important predictor of HbA1c at age 12. Therefore, the ranking of HbA1c levels appear to be fairly stable over time. PMID:25875773

  7. Sine-Gordon Equation in (1+2 and (1+3 dimensions: Existence and Classification of Traveling-Wave Solutions.

    Directory of Open Access Journals (Sweden)

    Yair Zarmi

    Full Text Available The (1+1-dimensional Sine-Gordon equation passes integrability tests commonly applied to nonlinear evolution equations. Its kink solutions (one-dimensional fronts are obtained by a Hirota algorithm. In higher space-dimensions, the equation does not pass these tests. Although it has been derived over the years for quite a few physical systems that have nothing to do with Special Relativity, the Sine-Gordon equation emerges as a non-linear relativistic wave equation. This opens the way for exploiting the tools of the Theory of Special Relativity. Using no more than the relativistic kinematics of tachyonic momentum vectors, from which the solutions are constructed through the Hirota algorithm, the existence and classification of N-moving-front solutions of the (1+2- and (1+3-dimensional equations for all N ≥ 1 are presented. In (1+2 dimensions, each multi-front solution propagates rigidly at one velocity. The solutions are divided into two subsets: Solutions whose velocities are lower than a limiting speed, c = 1, or are greater than or equal to c. To connect with concepts of the Theory of Special Relativity, c will be called "the speed of light." In (1+3-dimensions, multi-front solutions are characterized by spatial structure and by velocity composition. The spatial structure is either planar (rotated (1+2-dimensional solutions, or genuinely three-dimensional--branes. Planar solutions, propagate rigidly at one velocity, which is lower than, equal to, or higher than c. Branes must contain clusters of fronts whose speed exceeds c = 1. Some branes are "hybrids": different clusters of fronts propagate at different velocities. Some velocities may be lower than c but some must be equal to, or exceed, c. Finally, the speed of light cannot be approached from within the subset of slower-than-light solutions in both (1+2 and (1+3 dimensions.

  8. Asthma in a university campus: a survey of students and staff of Obafemi Awolowo University, Ile-Ife, Nigeria.

    Science.gov (United States)

    Erhabor, Gregory E; Obaseki, Daniel O; Awopeju, Olayemi F; Ijadunola, Kayode T; Adewole, Olufemi O

    2016-01-01

    Asthma continues to be an important cause of morbidity and mortality in developing countries. But, its burden among adult populations in university campuses is not well described. Through a multistage cluster sampling of students and staff of the Obafemi Awolowo University, Ile-Ife, Nigeria, we obtained a representative sample, each for students and staff. We administered the European Community Respiratory Health Survey (ECRHS) screening questionnaire to all the respondents. A subgroup did a spirometry test and completed a detailed questionnaire. Asthma was considered "possible", if a respondent provided affirmative response to symptoms of "wheezing or whistling", "attack of shortness of breath", "diagnosed attack of asthma" in the last 12 months or "currently taking medicines for asthma". From population of 13,750 students and 1428 staff of the university, we systematically sampled 2750 (20%) students and all the staff. Amongst these, 2372 students and 455 staff completed the screening questionnaire. The mean age (SD) of the responders was 21.9 (3.2) and 46.1 (8.9) for students and staff and most of them were men; 58.6% and 65.9%, respectively. While an estimated 2.6% (95% CI: 1.7-3.5) of students had an asthma attack in the preceding 12 months, 14.5% (95% CI: 12.5-16.5) and 25.2% (95% CI: 22.8-27.7) reported shortness of breath and nocturnal cough, respectively. The staff population reported fewer symptoms. The proportion with "possible asthma" was 18.2% (95% CI: 16.0-20.4) for students and 8.0% (95% CI: 5.4-10.7) for staff. The prevalence of asthma is high among students and staff of Obafemi Awolowo University, Nigeria.

  9. Drinking, cannabis use and driving among Ontario students.

    Science.gov (United States)

    Adlaf, Edward M; Mann, Robert E; Paglia, Angela

    2003-03-04

    Little is known about the risk of injury among adolescents who drive after the use of alcohol or cannabis or ride in cars driven by drunk drivers. We examined data from self-administered interviews with 1846 students in grades 7 to 13 who participated in the 2001 Ontario Student Drug Use Survey about their experiences related to alcohol, cannabis and driving during the 12 months preceding the survey. In all, 31.9% of the students reported being a passenger in a car driven by a drunk driver; of the students in grades 10 to 13 who had a driver's licence, 15.1% reported driving within an hour after consuming 2 or more drinks, and 19.7% reported driving within an hour after using cannabis. Our study shows that a sizeable proportion of adolescents are exposed to alcohol- and drug-related driving risks.

  10. New open-framework three-dimensional lanthanide oxalates containing as a template the diprotonated 1,2- or 1,3-diaminopropane

    International Nuclear Information System (INIS)

    Mohanu, A.; Brouca-Cabarrecq, C.; Trombe, J.C.

    2006-01-01

    Single crystals of three new open-framework lanthanide oxalates have been synthesized hydrothermally, in the presence of 1,2-diaminopropane, (C 3 N 2 H 12 )[Nd(H 2 O)(C 2 O 4 ) 2 ] 2 .3H 2 O I and (C 3 N 2 H 12 )[Yb(C 2 O 4 ) 2 ] 2 .5H 2 O II, or 1,3-diaminopropane (C 3 N 2 H 12 ) 2 [La 2 (C 2 O 4 ) 5 ].5H 2 O III. Their structures have been determined by X-ray diffraction data: I and III crystallize in the triclinic system, space group P-1, with a=7.8130(5)A, b=11.8800(6)A, c=12.9940(8)A, α=93.092(5) o , β=93.930(6) o , γ=108.359(5) o and a=11.6650(9)A, b=11.9240(6)A, c=13.2230(7)A, α=104.585(4) o , β=108.268(5) o , γ=111.132(5) o , respectively while II crystallizes in the orthorhombic system, space group F2dd, with a=8.7970(4)A, b=16.1550(8)A, c=32.170(2)A. The three-dimensional (3D) framework of these compounds is built up by the linkages of lanthanide atoms and the oxygen atoms of the bischelating oxalate ligands. Instead of four chelating oxalate units surrounding a lanthanide atom (I and II), both lanthanum atoms, in III, are surrounded by five chelating oxalate groups and that is new. In all the cases within the frame, are observed 8- and 12-membered channels where are localized the guest species, 1,2- or 1,3-diaminopropane cations and free water molecules. The ratio of the guest number (especially the diaminopropane) per 12-membered ring could tune the shape and the size of 12-membered channels: thus, the 12-membered channels, observed for I and II, have elliptical cross-section (5.5Ax11.4A and 5.2Ax9.5A) while those, observed for III, have nearly circular cross-section (9.1Ax9.5A). The lanthanide atoms are 8, 9 and 10-fold coordinated for Yb (II), Nd (I) and La (III), respectively

  11. Age peculiarities of the structure of senior pupils' and students' initiativity

    Directory of Open Access Journals (Sweden)

    V V Alekseyeva

    2009-03-01

    Full Text Available The results of this research of age peculiarities of senior pupils' and students' initiativity based on multimeasureble-functional model of personal structure of their qualities, which gives an opportunity to study, the display of individual peculiarities of initiativity are considered in this article.

  12. ENGAGEMENT AND BURNOUT AMONG NURSING AND PSYCHOLOGY STUDENTS IN SLOVAKIA

    OpenAIRE

    Zuzana Škodová; Ľubica Bánovčinová; Petra Lajčiaková

    2017-01-01

    Aim: The aim of the study was to examine the differences in engagement and burnout syndrome in students of nursing/midwifery and psychology in Slovakia. Design: A cross-sectional design was used. Methods: 171 university students on a baccalaureate program participated in the research (90.9% females; age 20.6 ± 1.3; 80 psychology students, 91 nursing/midwifery students). The School Burnout Inventory (SBI) and Utrecht Work Engagement Scale (UWES) were employed as measurement methods. Results: A...

  13. Dietary vitamin D dose-response in healthy children 2 to 8 y of age: a 12-wk randomized controlled trial using fortified foods.

    Science.gov (United States)

    Brett, Neil R; Lavery, Paula; Agellon, Sherry; Vanstone, Catherine A; Maguire, Jonathon L; Rauch, Frank; Weiler, Hope A

    2016-01-01

    Vitamin D is fundamental for bone health. A high proportion of Canadian 2- to 8-y-olds do not meet the Estimated Average Requirement (EAR) of 400 IU/d. The objective was to determine whether vitamin D intakes consistent with the EAR or Recommended Dietary Allowance (RDA), through fortification of additional dairy products, would result in higher vitamin D status in young children. Participants aged 2-8 y (n = 77; Montreal, Canada) were randomly assigned to 1 of 3 dietary vitamin D targets (control; EAR: 400 IU/d; or RDA: 600 IU/d) for 12 wk (January to April 2014). Anthropometric measurements, demographic characteristics, dietary intakes, fasting serum parathyroid hormone, 25-hydroxyvitamin D [25(OH)D], and ionized calcium were compared by using mixed-model ANOVA. Participants' mean ± SD age was 5.1 ± 1.9 y; 54.5% were boys with body mass index z scores of 0.50 ± 0.85. Compliance was 85% overall. No differences were observed in baseline dietary vitamin D intakes or serum 25(OH)D. At 12 wk, the EAR and RDA groups had significantly higher vitamin D intakes [median (IQR): control, 227 (184-305) IU/d; EAR, 410 (363-516) IU/d; and RDA, 554 (493-653) IU/d; P D concentrations (control: 55.8 ± 12.3 nmol/L; EAR: 64.1 ± 10.0 nmol/L; and RDA: 63.7 ± 12.4 nmol/L; P D concentrations ≥50 nmol/L. Increasing the vitamin D intakes of young children through fortification of alternative dairy products results in significantly higher serum concentrations of 25(OH)D and a significantly greater proportion of children with serum 25(OH)D ≥50 nmol/L during periods of minimal ultraviolet B radiation exposure. This trial was registered at clinicaltrials.gov as NCT02097160 and had Health Canada Temporary Marketing Authorization Letters for both products (TM-13-0432 and TM-13-0433). © 2016 American Society for Nutrition.

  14. Simultaneous measurement of neuronal and glial metabolism in rat brain in vivo using co-infusion of [1,6- 13C 2]glucose and [1,2- 13C 2]acetate

    Science.gov (United States)

    Deelchand, Dinesh K.; Nelson, Christopher; Shestov, Alexander A.; Uğurbil, Kâmil; Henry, Pierre-Gilles

    2009-02-01

    In this work the feasibility of measuring neuronal-glial metabolism in rat brain in vivo using co-infusion of [1,6- 13C 2]glucose and [1,2- 13C 2]acetate was investigated. Time courses of 13C spectra were measured in vivo while infusing both 13C-labeled substrates simultaneously. Individual 13C isotopomers (singlets and multiplets observed in 13C spectra) were quantified automatically using LCModel. The distinct 13C spectral pattern observed in glutamate and glutamine directly reflected the fact that glucose was metabolized primarily in the neuronal compartment and acetate in the glial compartment. Time courses of concentration of singly and multiply-labeled isotopomers of glutamate and glutamine were obtained with a temporal resolution of 11 min. Although dynamic metabolic modeling of these 13C isotopomer data will require further work and is not reported here, we expect that these new data will allow more precise determination of metabolic rates as is currently possible when using either glucose or acetate as the sole 13C-labeled substrate.

  15. The Relationship of Korean Students' Age and Years of English-as-a-Foreign-Language Exposure with English-Reading Ability: A Cross-Age Study

    Science.gov (United States)

    Fitzgerald, Jill; Stenner, A. Jackson; Sanford-Moore, Eleanor E.; Koons, Heather; Bowen, Kimberly; Kim, Kee Hyung

    2015-01-01

    The purpose of the present cross-age study with South Korean students was to investigate the relationship of age and years of English-as-a-foreign-language (EFL) exposure with English-reading ability. The main research question was, "Do individuals' age and number of years of English exposure interact in relation to English-reading…

  16. Heterogeneity of [3H]phorbol 12,13-dibutyrate binding in primary mouse keratinocytes at different stages of maturation

    International Nuclear Information System (INIS)

    Dunn, J.A.; Jeng, A.Y.; Yuspa, S.H.; Blumberg, P.M.

    1985-01-01

    Mouse keratinocytes respond heterogeneously to phorbol esters with distinct subpopulations stimulated to proliferate or induced to differentiate. The maturation state of the epidermal cell at the time of exposure may determine its response. The binding of phorbol esters to primary mouse keratinocytes was studied under culture conditions selecting for proliferating cells or differentiating cells. [20- 3 H]-12-Deoxyphorbol 13-isobutyrate ([ 3 H]-DPB) bound to both types of cells at one class of binding sites. The dissociation constant (Kd) for [ 3 H]DPB in the proliferative cells was 69 nM and the binding at saturation (Bmax) was 1.3 pmol/mg of protein. The corresponding values in the differentiative cells were 96 nM and 1.5 pmol/mg of protein, respectively. In contrast to the results obtained with [ 3 H]DPB, [20- 3 H]phorbol 12,13-dibutyrate ([ 3 H]PDBU) bound to both cell types in a heterogeneous fashion. The site for [ 3 H]DPB binding seemed to correspond to the higher affinity [ 3 H]PDBU binding site. The major difference in the cells grown in the medium containing 1.2 mM CaCl 2 was an increase in the Bmax of the lower affinity binding site with the other three parameters remaining similar. The state of epidermal differentiation thus appears to modulate the amount of the lower affinity binding sites for phorbol esters

  17. Relational Aggression in Preschool Students: An Exploration of the Variables of Sex, Age, and Siblings

    Directory of Open Access Journals (Sweden)

    Karen A. Morine

    2011-01-01

    Full Text Available In this study, researchers wished to ascertain whether there were age (three- and four-year old, sibling (with or without older siblings, and sex (male and female differences in the use of relational aggression in preschool students as rated by peers and teachers. In order to answer this research question, two 2 × 2 × 2 factorial ANOVA procedures with the relational aggression composite score as the dependent variable on the PSBS-P and PSBS-T were used for peer and teacher assessment, respectively, of relational aggression. Results revealed that in the peer ratings of preschool students' relationally aggressive behavior, there was an disordinal age by sibling interaction, in which four-year-old children with siblings were significantly more likely to be rated by their peers as using relational aggression than three-year-old children without siblings. In the teacher ratings of preschool students' relationally aggressive behavior, a main effect for age was observed. Teachers rated four-year old children as evidencing significantly higher levels of relational aggression as compared to three-year-olds. No sex differences were observed in the use of relational aggression either at age three or age four in this sample. Implications for these findings are presented.

  18. Screening for aneuploidies by maternal age, fetal nuchal translucency and maternal serum biochemistry at 11-13+6 gestational weeks

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    Karadžov-Orlić Nataša

    2012-01-01

    Full Text Available Introduction. Aneuploidies are the major cause of perinatal death and early psychophysical disorders. Objective. In this study, we analyzed detection and false-positive rates of screening for aneuploidies in the first trimester by the combination of maternal age, fetal nuchal translucency (NT thickness and maternal serum free beta-human chorionic gonadotrophin (β-hCG, and pregnancy-associated plasma protein-A (PAPP-A at 11-13+6 weeks of gestation, using the appropriate software developed by the Fetal Medicine Foundation. Methods. Our screening study for aneuploidies analyzed 4172 singleton pregnancies from January 2006 to December 2010. The sensitivities and false-positive rates using the combined aneuploidies determination for the risk cut-off of 1:275 were evaluated. Results. In the trisomy 21 pregnancies, the fetal NT was higher than 95th centile, in 72.8%, serum free b-hCG concentration it was above the 95th centile in 55% and serum PAPP-A was below the 5th centile in 47% of the cases. In the trisomy 18 and 13, the fetal NT was above 95th centile in 66.6% and 44.4% of the cases, respectively. The serum free b-hCG concentration was above the 95th centile in 0 and 10%, but serum PAPP-A was below 5th centile in 80.9% and 88.8% of pregnancies. In the trisomy 21 pregnancies the median free beta-hCG was 2.3 MoM and the median PAPP-A was 0.45 MoM. Chromosomal abnormalities were detected in 169 fetuses: trisomy 21 (97, Turner syndrome (19, trisomy 18 (28, trisomy 13 (11 and others (14. Detection rate of combined screening for aneuploides were 86.0% with false positive rate of 5.3% (mean age 33±4.9 years, >35 years in 35% of pregnancies. Conclusion. Our study suggests that the strategy of first-trimester combined screening of biochemical values and ultrasonographic parameters at 12 gestational weeks identifies higher percentage of aneuploidies with a lower false-positive rate than a single parameter strategy.

  19. The Predictive Role of Teaching Styles on Omani Students' Mathematics Motivation

    Science.gov (United States)

    Aldhafri, Said; Alrajhi, Marwa

    2014-01-01

    The current study explored the effects of two teaching styles, authoritative and authoritarian, on students' mathematics motivation. The two motivational constructs examined were intrinsic and extrinsic motivation. Data were collected from 425 Omani 8th grade students (males = 202/females = 223, mean age = 13.44, SD = 0.79). Through two…

  20. Binge Alcohol Use among Persons Aged 12 to 20: 2002 and 2003 Update. The NSDUH Report

    Science.gov (United States)

    Substance Abuse and Mental Health Services Administration, 2005

    2005-01-01

    Research has shown that persons who engage in binge alcohol use as teenagers are at increased risk for binge drinking as young adults. Binge Alcohol Use among Persons Aged 12 to 20: 2002 and 2003 Update asks respondents aged 12 or older to report their frequency and quantity of alcohol use during the month before the survey. NSDUH defines binge…

  1. Effects of 8-Week Training on Aerobic Capacity and Swimming Performance of Boys Aged 12 Years

    Science.gov (United States)

    Zarzeczny, Ryszard; Kuberski, Mariusz; Deska, Agnieszka; Zarzeczna, Dorota; Rydz, Katarzyna; Lewandowska, Anna; Balchanowski, Tomasz; Bosiacki, Janusz

    2011-01-01

    Study aim: To assess the effects of 8-week endurance training in swimming on work capacity of boys aged 12 years. Material and methods: The following groups of schoolboys aged 12 years were studied: untrained control (UC; n = 14) and those training swimming for two years. The latter ones were subjected to 8-week training in classical style (CS; n…

  2. Influence of Age, Sex, and Race on College Students' Exercise Motivation of Physical Activity

    Science.gov (United States)

    Egli, Trevor; Bland, Helen W.; Melton, Bridget F.; Czech, Daniel R.

    2011-01-01

    Objective: The authors examined differences in exercise motivation between age, sex, and race for college students. Participants: Students from 156 sections of physical activity classes at a midsize university were recruited (n = 2,199; 1,081 men, 1,118 women) in 2005-2006 and volunteered to complete the Exercise Motivation Inventory. Methods:…

  3. The Accounting Principles Instructor's Influence on Students' Decision To Major in Accounting.

    Science.gov (United States)

    Mauldin, Shawn; Crain, John L.; Mounce, Patricia H.

    2000-01-01

    A survey of 81 accounting majors, 60 business majors, 12 nonbusiness majors, and 13 undecided students in accounting principles courses found that accounting principles instructors play the most significant role in the decision to major in accounting. Many students decide to major during their first principles course. (SK)

  4. The impact of exercise therapy on the musculoskeletal abnormalities of blind boy students of 12- 18 years old at Tehran Mohebbi blind school

    Directory of Open Access Journals (Sweden)

    Habib Allah Jadidi

    2009-08-01

    Full Text Available Introduction: The purpose of this study was to examine the 13 musculoskeletal abnormalities (fronthead, lateral bending head, shoulder dropping, scoliosis, kyphosis, lumbar lordosis, flat back,pelvicobliguity, genu varum, x.leg, flat foot, pes cavus, and hallux valgus after a period of exercisetherapy on the blind boy students without secondary disability.Materials and Methods: In this semi-experimental research, 60 boy students were included fromsecondary and high school (12-18 years old including 34 congenital blind and 26 semi blind. Theywere selected among 135 students at Tehran Mohebbi blind school. They were tested by measurementtools (symetrigraph, antropometer, and podioscope. After examining the results by the New York test,the students who were diagnosed with one or more musculoskeletal abnormalities took part in fourmonth’sexercises with 3 sessions at weak. The results were registered after the end of the exerciseprogram and administered secondary exam. The data before and after the exam were analyzed.Results: 80 percents of the blind students at pre-exam had musculoskeletal abnormalities which aredecreased to 45 percent after exercises. There were significant differences on the rate of recovery at 11abnormalities (Exact – Sign = 0 < 0/05 and there were not significant differences at pelvicobliguityand x.leg abnormalities (Exact – Sign = 1 < 0/05.Conclusion: the research findings emphasized on the validation and important of exercise therapyon musculoskeletal abnormalities.

  5. Technology and Man: The Humanities and Science (Selected Study Topics for Gifted Students in Grades 9-12).

    Science.gov (United States)

    Abbott, Barbara; Diers, Russell

    One in a series of units of instruction for gifted students, the booklet focuses on humanities and science. Three sample units are offered for students in grades 9-12. In "Man's Origins: Where Did He Come From?" students examine the conflicts over evolution versus creationism, impacts of genetic control, and the ecomonics and politics of the…

  6. Curiosity killed the cat: No evidence of an association between cat ownership and psychotic symptoms at age 13 and 18 years in a UK general population cohort

    Science.gov (United States)

    Solmi, F.; Hayes, J.F; Lewis, G.; Kirkbride, J.B

    2018-01-01

    Background Congenital or early life infection with Toxoplasma Gondii has been implicated in schizophrenia aetiology. Childhood cat ownership has been hypothesised as an intermediary marker of T. Gondii infection and, by proxy, as a risk factor for later psychosis. Evidence supporting this hypothesis is, however, limited. Method We used birth cohort data from the Avon Longitudinal Study of Parents and Children (ALSPAC) to investigate whether cat ownership in pregnancy and childhood (4, 10 years old) was associated with psychotic experiences (PEs) in early (age 13; N=6,705) and late (age 18; N=4,676) adolescence, rated from semi-structured interviews. We used logistic regression to examine associations between cat ownership and PEs, adjusting for several sociodemographic and socioeconomic factors, household characteristics and dog ownership. Missing data were handled via multiple imputation. Results Cat ownership during pregnancy was not associated with PEs at age 13 (adjusted odds ratio [OR]: 1.15, 95% confidence interval [CI]: 0.97-1.35) or 18 years (OR: 1.08, 95%CI: 0.86-1.35). Initial univariable evidence that cat ownership at 4 and 10 years was associated with PEs at age 13 years did not persist after multivariable adjustment (4 years OR: 1.18, 95%CI: 0.94-1.48; 10 years OR 1.12, 95%CI: 0.92; 1.36). There was no evidence that childhood cat ownership was associated with PEs at 18 years old. Conclusions While pregnant women should continue to avoid handling soiled cat litter, given possible T Gondii exposure, our study strongly indicates that cat ownership in pregnancy or early childhood does not confer an increased risk of later adolescent PEs. PMID:28222824