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Sample records for pss influences academic

  1. Influence of MWCNTs Doping on the Structure and Properties of PEDOT:PSS Films

    Directory of Open Access Journals (Sweden)

    Jiao Li

    2009-01-01

    Full Text Available Poly(3,4-ethylenedioxythiophene:poly(4-styrenesulfonate (PEDOT:PSS doped with multi-walled carbon nanotubes (MWCNTs films is fabricated on quartz substrates by spin coating method. The effects of MWCNTs on the structure and properties of PEDOT:PSS film have been investigated. X-ray diffractometer (XRD and Fourier transform Raman spectroscopy (FTRM show that the crystallization behavior and the main chain of PEDOT:PSS are not changed. Atomic force microscopy (AFM shows that individual nanotubes are well dispersed in the PEDOT:PSS matrix. Moreover, some nanotubes overlap into a net-like structure, forming new conductive channels, which can enhance efficiently the film conductivity. The conductivity of PEDOT:PSS film doped with a lower percentage of MWCNTs (0.2 wt% is 9.16 S/cm, higher than that of pure PEDOT:PSS film (0.28 S/cm, although the optical transmission of PEDOT:PSS decreases a little after the addition of MWCNTs. The interaction between MWCNTs and PEDOT:PSS during melt mixing is also given a possible explanation.

  2. Influence of electrolyte distribution in PEDOT:PSS based flexible electrochromic devices

    Science.gov (United States)

    Gavim, Anderson E. X.; Santos, Gustavo H.; de Souza, Edgar H.; Rodrigues, Paula C.; Floriano, João B.; Kamikawachi, Ricardo C.; de Deus, Jeferson F.; Macedo, Andreia G.

    2017-12-01

    Two flexible electrochromic devices based on PEDOT:PSS were prepared by roll-to-roll method, these devices were built with the conventional layered geometry or using PEO:LiClO4 and charge balancing material mixed at the same layer. Analysis of the properties leads to the conclusion that the presence of the percolation channels of PEDOT:PSS inside the PEO/LiClO4 results in the performance improvement as monitored by impedance spectroscopy and the respective Randles equivalent circuits. From mixed electrochromic layer, ηd increases up to 834 C-1 cm2 after 1.5 s of switch time, while the corresponding layered device showed ηd of 472 C-1 cm2 at the same time interval.

  3. Estimation of the Influence of Power System Mathematical Model Parameter Uncertainty on PSS2A System Stabilizers

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    Adrian Nocoń

    2015-09-01

    Full Text Available This paper presents an analysis of the influence of uncertainty of power system mathematical model parameters on optimised parameters of PSS2A system stabilizers. Optimisation of power system stabilizer parameters was based on polyoptimisation (multi-criteria optimisation. Optimisation criteria were determined for disturbances occurring in a multi-machine power system, when taking into account transient waveforms associated with electromechanical swings (instantaneous power, angular speed and terminal voltage waveforms of generators. A genetic algorithm with floating-point encoding, tournament selection, mean crossover and perturbative mutations, modified for the needs of investigations, was used for optimisation. The impact of uncertainties on the quality of operation of power system stabilizers with optimised parameters has been evaluated using various deformation factors.

  4. Influence of the deposition parameters on the morphology and electrical conductivity of PANI/PSS self-assembled films

    Energy Technology Data Exchange (ETDEWEB)

    Braga, Guilherme S. [Departamento de Engenharia de Sistemas Eletronicos, Escola Politecnica da Universidade de Sao Paulo, Avenida Professor Luciano Gualberto, travessa 3, 158, 05508-900, Sao Paulo - SP (Brazil)], E-mail: gbraga@lme.usp.br; Paterno, Leonardo G.; Lima, John Paul H.; Fonseca, Fernando J. [Departamento de Engenharia de Sistemas Eletronicos, Escola Politecnica da Universidade de Sao Paulo, Avenida Professor Luciano Gualberto, travessa 3, 158, 05508-900, Sao Paulo - SP (Brazil); Andrade, Adnei M. de [Departamento de Engenharia de Sistemas Eletronicos, Escola Politecnica da Universidade de Sao Paulo, Avenida Professor Luciano Gualberto, travessa 3, 158, 05508-900, Sao Paulo - SP (Brazil); Instituto de Eletrotecnica e Energia, Universidade de Sao Paulo, Avenida Professor Luciano Gualberto, 1289, 05508-010, Sao Paulo - SP (Brazil)

    2008-05-01

    The influence of deposition parameters, namely polymer concentration and pH of the deposition solution, cleaning, and drying steps on the morphology and electrical characteristics of polyaniline and sulfonated polystyrene (PANI/PSS) nanostructured films deposited by the self-assembly technique is evaluated by UV-Vis spectroscopy, optical and atomic force microscopy, and electrical resistance measurements. It is found that stirring the cleaning solution during the cleaning step is crucial for obtaining homogenous films. Stirring of the cleaning solution also influences the amount of PANI adsorbed in the films. In this regard, the drying process seems to be less critical since PANI amount and film thickness are similar in films dried with N{sub 2} flow or with an absorbent tissue. It is observed, however, that drying with N{sub 2} flow results in rougher films. As an additional point, an assessment of the influence of the deposition method (manual versus mechanical) on the film characteristics was carried out. A significant difference on the amount of PANI and film thickness between films prepared by different human operators and by a homemade mechanical device was observed. The variability in film thickness and PANI adsorbed amount is smaller in films mechanically assembled.

  5. PSS Case Book

    DEFF Research Database (Denmark)

    Neugebauer, Line Maria; Mougaard, Krestine; Andersen, Jakob Bejbro

    The transformation process towards a PSS-oriented company is describes, through the presentation of the best practice cases. Each case describes motivations, challenges, business models and PSS offerings....

  6. How the Family Influences Children's Academic Achievement.

    Science.gov (United States)

    Lam, Shui Fong

    Children's academic achievement has been shown to be influenced by many family factors, including family structure, socioeconomic status, and parenting styles. This study investigated the relationships among family structure, socioeconomic status, authoritative parenting, and children's academic achievement in a sample of 181 eighth graders in 2…

  7. Influence of teachers' competence on students academic ...

    African Journals Online (AJOL)

    This study investigated the influence of teachers' competence on students; academic performance in senior secondary school chemistry. A random sampling technique was used to select 6 secondary schools out of 12 secondary schools in Yala Local Government Area of Cross River State. 200 students, 20 teachers and 6 ...

  8. Adolescent discounting behaviour: influences on academic achievement

    NARCIS (Netherlands)

    Lee, Nikki; Krabbendam, Lydia; Dekker, Sanne; Boschloo, Annemarie; De Groot, Renate; Jolles, Jelle

    2012-01-01

    Lee, N. C., Krabbendam, L., Dekker, S., Boschloo, A., De Groot, R. H. M., & Jolles, J. (2011, June). Adolescent discounting behaviour: influences on academic achievement. Poster presented at the 3rd Biennial Conference of the International Mind, Brain, and Education Society, San Diego, United

  9. Influences of Mood on Academic Course Evaluations

    Science.gov (United States)

    Zumbach, Joerg; Funke, Joachim

    2014-01-01

    In two subsequent experiments, the influence of mood on academic course evaluation is examined. By means of facial feedback, either a positive or a negative mood was induced while students were completing a course evaluation questionnaire during lectures. Results from both studies reveal that a positive mood leads to better ratings of different…

  10. Academic musculoskeletal radiology: influences for gender disparity.

    Science.gov (United States)

    Qamar, Sadia R; Khurshid, Kiran; Jalal, Sabeena; Bancroft, Laura; Munk, Peter L; Nicolaou, Savvas; Khosa, Faisal

    2017-12-20

    Research productivity is one of the few quintessential gauges that North American academic radiology departments implement to determine career progression. The rationale of this study is to quantify the relationship of gender, research productivity, and academic advancements in the musculoskeletal (MSK) radiology to account for emerging trends in workforce diversity. Radiology residency programs enlisted in the Fellowship and Residency Electronic Interactive Database (FREIDA), Canadian Resident Matching Service (CaRMS) and International Skeletal Society (ISS) were searched for academic faculty to generate the database for gender and academic profiles of MSK radiologists. Bibliometric data was collected using Elsevier's SCOPUS archives, and analyzed using Stata version 14.2. Among 274 MSK radiologists in North America, 190 (69.34%) were men and 84 (30.66%) were women, indicating a statistically significant difference (χ2 = 6.34; p value = 0.042). The available number of female assistant professors (n = 50) was more than half of the male assistant professors (n = 88), this ratio however, plummeted at higher academic ranks, with only one-fourth of women (n = 11) professors compared to men (n = 45). The male MSK radiologist had 1.31 times the odds of having a higher h-index, keeping all other variables constant. The trend of gender disparity exists in MSK radiology with significant underrepresentation of women in top tiers of academic hierarchy. Even with comparable h-indices, at the lower academic ranks, a lesser number of women are promoted relative to their male colleagues. Further studies are needed to investigate the degree of influence research productivity has, in determining academic advancement of MSK radiologists.

  11. Deciding on PSS: A Framework for PSS Strategies

    DEFF Research Database (Denmark)

    Neugebauer, Line Maria; Mougaard, Krestine; Andersen, Jakob Axel Bejbro

    2013-01-01

    Product/Service-Systems (PSS) are a strategic approach wherein the value proposition covers the performance of a system throughout the whole life cycle. Many industrial companies are challenged on many levels in the transition process towards a PSS oriented approach. Much of the literature has...... a PSS strategy topic matrix, as a boundary object for the company, aimed at creating a shared understanding of important factors in the organisation while evaluating, developing, implementing and operating a PSS strategy. This is done through an empirical foundation of twelve companies representing...... until now focused on PSS from a design object perspective, and less focus has been on how the business model of the company must be designed simultaneously with the offering, covering topics as organisational restructuring, value chain collaboration plus a change management focus. This paper presents...

  12. The Influence of Peer Groups on Academic Success

    Science.gov (United States)

    Sallee, Margaret W.; Tierney, William G.

    2007-01-01

    The authors examine how peer relationships influence students' academic success. After defining peer groups, the article considers the ways in which students' peer networks facilitate or inhibit access to academic resources. The authors argue that the composition and purpose of a peer group influences academic achievement and students' likelihood…

  13. Influence of personality types and academic procrastination on the ...

    African Journals Online (AJOL)

    This study examined the influence of personality type and academic procrastination on the Academic Achievement of Senior Secondary School students in Ibadan metropolis. Sample consisted of 200 senior secondary school students in Ibadan metropolis. Two research instruments were used: namely academic ...

  14. Academic Pharmacy: Where is Our Influence?

    Science.gov (United States)

    Ferreri, Stefanie P; Cross, L Brian; Hanes, Scott D; Jenkins, Tara; Meyer, Douglas; Pittenger, Amy

    2017-05-01

    Objective. To evaluate the talents of fellows from cohorts 1-10 of the Academic Leadership Fellows Program (ALFP). Methods. This was a descriptive analysis of previously collected ALFP cohort data reflecting the talents using the Clifton StrengthsFinder assessment tool. Data consisted of 295 fellows from the first 10 years of the ALFP program. The Clifton StrengthsFinder talents were aggregated and analyzed to determine talents (strengths) distribution and domain. The aggregate of the four domains were compared among ALFP fellows using a chi-square analysis with an a priori alpha of .05. Results. Lowest frequency of talents was found in the influencing domain (11.2%), while the domains with the largest frequency of talents were strategic thinking (34.4%) and executing (31.1%). When looking at the specific talents within the domains among the ALFP fellows, achiever (in the executing domain) and learner (in the strategic thinking domain) were the most frequent talents, while command (in the influencing domain) and adaptability (in the relationship building domain) were the least frequent talents. Conclusions. Since the profession is deficient in the influencing and relationship building domains (command and adaptability talents, respectively), this could help explain our slow progress in moving the profession from a product-focused role to a provider-based role. Perhaps the profession should be using a strategy better aligned with our signature leadership domains of executing and strategic thinking and focus on being a member of the health care team by aligning with team-based care rather than obtaining provider status.

  15. Dialect and Influences on the Academic Experiences of College Students

    Science.gov (United States)

    Dunstan, Stephany Brett; Jaeger, Audrey J.

    2015-01-01

    The dialects that college students speak represent a type of diversity that can influence many elements of their experiences in college, including academic experiences. In this study, we examined the influence of speaking a stigmatized dialect on academic experiences for White and African American students (both male and female) from rural…

  16. A Study of Motivational Influences on Academic Achievement

    Science.gov (United States)

    Dishon-Berkovits, Miriam

    2014-01-01

    This study examined the influence of motivation on academic achievement. The theoretical rationale for the study is grounded in bridging two influential yet isolated literatures of motivation: goal setting theory and achievement goal theory. Although it is clear that academic performance should be influenced by assigned learning goals,…

  17. Assessing product service systems (PSS)

    DEFF Research Database (Denmark)

    Hsuan, Juliana; McAloone, Tim C.; Neugebauer, Line

    We apply a management tool to classify different integrated PSS within the context of Danish maritime industry. We investigate how a firm should organize its operations to manage the transition from being a manufacturing to a servitizing company, and to provide a guideline for strategic positioni...... and planning of the balance between product sales and service activities....

  18. Academic motivation mediates the influence of temporal discounting on academic achievement during adolescence

    NARCIS (Netherlands)

    Lee, Nikki; Krabbendam, Lydia; Dekker, Sanne; Boschloo, Annemarie; De Groot, Renate; Jolles, Jelle

    2012-01-01

    Lee, N. C., Krabbendam, L., Dekker, S. J., Boschloo, A. M., De Groot, R. H. M., & Jolles, J. (2012). Academic motivation mediates the influence of temporal discounting on academic achievement during adolescence. Trends in Neuroscience and Education, 1(1), 43-48.

  19. Perceived Influence of Online Social Networks on Academic ...

    African Journals Online (AJOL)

    Results revealed that majority of the respondents make use of online social networks even though motivation for use is more for social interaction than academic purposes. Most of the respondents, however, agreed that the use of online social networks have positive influence on their academic performance. Based on these ...

  20. Factors that Influence Research Output of Academic Librarians in ...

    African Journals Online (AJOL)

    The survey was carried out to determine the factors that influence research output of academic librarians in Niger state. It was aimed at providing the reality of the opinion on research output of academic librarians who are working in Niger state. Questionnaire were designed and distributed to (65) sixty five of the (85) eighty ...

  1. Influence of academic procrastination and personality types on ...

    African Journals Online (AJOL)

    The study examined the influence of academic procrastination and personality types on the academic achievement and efficacy of In-school adolescents in Ibadan, Oyo state. Two hundred participants were randomly selected from four schools in Akinyele Local Government area of Oyo state. Multiple regression analysis ...

  2. influence of teachers' competence on students academic ...

    African Journals Online (AJOL)

    Admin

    pedagogical. Academic competencies are the teacher's knowledge of his subject. Pedagogical competency is the art of teaching the subject, observing such principles as teaching from known to ... A. U. Ugbe, Faculty of Education, Cross River University of Technology, Akamkpa Campus, Nigeria ..... educational psychology.

  3. Influence of academical institutes on educational processes

    Science.gov (United States)

    Chernyakov, S. M.

    Murmansk is in the most northern European part of Russia and has problems with a higher educational system and with preparation of some necessary specialists for organizations of our region. They are consequencies of social and economical changes in the Russian society. But it gives a chance to revalue our system of higher education and a role of society and academical institutes in the process of education. During several years the Russian government supports a program ``Integration of basic science and higher school'' which has an aim to unite efforts of educational and academical organizations for to solve some educational and scientific problems of higher school using a potential of academical society. We decided to use the support of our government for solving of the part of our problems. In 1999 we had offered to organize a regional scientific student conference devoted to natural-science problems of the Arctic region and the project was supported. The first experience of the conference was obtained during the May 2000 when in Murmansk it was conducted the 1st regional scientific student conference devoted to physics and methods investigation of high-latitude atmosphere. The conference was organized by the Polar Geophysical Institute of the Kola Scientific Centre of the Russian Academy of Sciences together with the Murmansk State Pedagogical University and the Murmansk State Technical University. It had a broad response and continuation. This year we shall conduct already the 5th conference ''Natural-science problems of the Arctic region'' which will take place in April. We receive reports of students from the Murmansk region and also from Arkhangelsk, Novgorod, Petrozavodsk, Sankt-Petersburg, Tumen, Yakutsk and other regions of Russia. It is experience of involving in the conference students from other regions of Russia which do investigations in the field. We plan to organize during the conference (as a part of it) a videoconference. We hope that those

  4. Influence of Academic Staff Variables on ICT use for agricultural ...

    African Journals Online (AJOL)

    This study was designed, to determine the influence of the academic variables on ICT utilisation for agricultural research in Nigerian universities. Stratified sampling technique was used to select respondents from two federal universities in each of the six geo-political zones of Nigeria, thus a total of twelve federal universities ...

  5. The Influence of Child Abuse on the Academic Performance of ...

    African Journals Online (AJOL)

    The aim of this study was to find out the influence of child abuse on pupils academic performance in primary science. To carry out this study effectively two variables were identified for the study. These were used to formulate the research hypotheses. The design for the study was ex-post-facto. The area of study was Cross ...

  6. The Influence of Instructional Materials on Academic Performance of ...

    African Journals Online (AJOL)

    This research work investigated the influence of instructional materials (teaching aids) on students' academic performance in senior secondary school Chemistry in Cross River State. A two group pre-test post test quasi-experimental design was adopted for the study. One research question and one hypothesis were ...

  7. Influencing Academic Motivation: The Effects of Student-Faculty Interaction

    Science.gov (United States)

    Trolian, Teniell L.; Jach, Elizabeth A.; Hanson, Jana M.; Pascarella, Ernest T.

    2016-01-01

    Using data from the Wabash National Study of Liberal Arts Education, we examined the influence of student-faculty interactions on student academic motivation over 4 years of college. Results suggest that several forms of student-faculty interaction, such as quality of faculty contact, frequency of faculty contact, research with faculty, personal…

  8. Career choice and its influence on academic performance of library ...

    African Journals Online (AJOL)

    The study examined career choice and its influence on academic performance of library and information science students in the University of Benin. Questionnaire was used to obtain information from the respondents. The entire population was used as sample because of the size of the population and the simple ...

  9. Students' Perceptions of Family Roles Influencing their Academic ...

    African Journals Online (AJOL)

    Students' Perceptions of Family Roles Influencing their Academic Achievement in Agricultural Sciences: Implications for Career Agriculture in Nigeria. ... However, there are differences in studentsf attributes, and the desire for parents to provide better educational opportunities to their children. This study randomly sampled ...

  10. Influence of Family Background on the Academic Performance of ...

    African Journals Online (AJOL)

    The findings showed that there were no significant differences in the influence of family background on academic performance of secondary school students based on gender and age while a significant difference was noted based on family type. Based on the findings of the study, it was recommended that the government ...

  11. New opportunities and responsibilities with PSS

    DEFF Research Database (Denmark)

    and management of the development process? - What are the new dimensions in the service oriented perspective? PSS and the market: - How can we align the interests of PSS provider and customer? - What are the roles of stakeholders in the development of PSS? - How can companies make use of the many opportunities...... and compete on the global market. One innovation strategy that has attained increasing attention the past years is transforming business from being based on the sale of goods to business based on offering a combined prod-uct-service system that continuously provides value to the customer. This approach has...... been dubbed “product/service-systems (PSS)”. The term is related and shared with other terms such as “functional economy”, “functional (total care) products”, “market offer development” and “service engineering”. PSS Research Over recent years a growing number of studies and research programmes have...

  12. The Relative Age Effect and Its Influence on Academic Performance

    Science.gov (United States)

    Navarro, Juan-José; García-Rubio, Javier; Olivares, Pedro R.

    2015-01-01

    Introduction and Purpose The policy of school organisation for grouping students in the same academic year is based on date of birth. The differences in the experiences and maturation of older students involve a relatively better performance in academic settings, which is known as the relative age effect (RAE). This effect is more important the younger the student is. The goal of this study is to identify the connections of influence that RAE, socioeconomic status (SES), and type of institution have on academic performance in a school population of eighth graders. Methods The study is based on a population-based, representative sample of 15,234 8th graders (50.4% female; average age = 13.61 years) in the 2011 National System of Quality Assessment in Education Survey (SIMCE) from Chile. The SIMCE for global academic performance consists of 4 tests: reading, mathematics, social studies, and science. All tests consist of multiple-choice and closed questions. In addition, in order to have the information of general academic performance, an extra variable expressing the average score of each student was created. Also, the SIMCE includes additional variables for the evaluation process such as SES or type of school. Students were assigned to one of five age groups in terms of date of birth (G1, G2, G3, G4, and G5), in which students belonging to G1 are the oldest and students belonging to G5 are the youngest. Results The results achieved in the structural equation modelling indicate a good global fit. Individual relationships show significant effects of the three variables observed on academic performance, although SES received the highest values. The influence of RAE took place both in the full sample and sub-samples composed according to the SES and academic performance, showing higher values for students with lower scores. Although the influence of RAE decreases when SES is controlled, its effect is still significant and contributes to additionally explain the

  13. The Relative Age Effect and Its Influence on Academic Performance.

    Science.gov (United States)

    Navarro, Juan-José; García-Rubio, Javier; Olivares, Pedro R

    2015-01-01

    The policy of school organisation for grouping students in the same academic year is based on date of birth. The differences in the experiences and maturation of older students involve a relatively better performance in academic settings, which is known as the relative age effect (RAE). This effect is more important the younger the student is. The goal of this study is to identify the connections of influence that RAE, socioeconomic status (SES), and type of institution have on academic performance in a school population of eighth graders. The study is based on a population-based, representative sample of 15,234 8th graders (50.4% female; average age = 13.61 years) in the 2011 National System of Quality Assessment in Education Survey (SIMCE) from Chile. The SIMCE for global academic performance consists of 4 tests: reading, mathematics, social studies, and science. All tests consist of multiple-choice and closed questions. In addition, in order to have the information of general academic performance, an extra variable expressing the average score of each student was created. Also, the SIMCE includes additional variables for the evaluation process such as SES or type of school. Students were assigned to one of five age groups in terms of date of birth (G1, G2, G3, G4, and G5), in which students belonging to G1 are the oldest and students belonging to G5 are the youngest. The results achieved in the structural equation modelling indicate a good global fit. Individual relationships show significant effects of the three variables observed on academic performance, although SES received the highest values. The influence of RAE took place both in the full sample and sub-samples composed according to the SES and academic performance, showing higher values for students with lower scores. Although the influence of RAE decreases when SES is controlled, its effect is still significant and contributes to additionally explain the performance. The RAE remains, even with residual

  14. Factors Influencing Seminar Learning and Academic Achievement.

    Science.gov (United States)

    Spruijt, Annemarie; Leppink, Jimmie; Wolfhagen, Ineke; Bok, Harold; Mainhard, Tim; Scherpbier, Albert; van Beukelen, Peter; Jaarsma, Debbie

    2015-01-01

    Many veterinary curricula use seminars, interactive educational group formats in which some 25 students discuss questions and issues relating to course themes. To get indications on how to optimize the seminar learning process for students, we aimed to investigate relationships between factors that seem to be important for the seminar learning process, and to determine how these seminar factors account for differences in students' achievement scores. A 57-item seminar evaluation (USEME) questionnaire was administered to students right after they attended a seminar. In total, 80 seminars distributed over years 1, 2, and 3 of an undergraduate veterinary medicine curriculum were sampled and 988 questionnaires were handed in. Principal factor analysis (PFA) was conducted on 410 questionnaires to examine which items could be grouped together as indicators of the same factor, and to determine correlations between the derived factors. Multilevel regression analysis was performed to explore the effects of these seminar factors and students' prior achievement scores on students' achievement scores. Within the questionnaire, four factors were identified that influence the seminar learning process: teacher performance, seminar content, student preparation, and opportunities for interaction within seminars. Strong correlations were found between teacher performance, seminar content, and group interaction. Prior achievement scores and, to a much lesser extent, the seminar factor group interaction appeared to account for differences in students' achievement scores. The factors resulting from the present study and their relation to the method of assessment should be examined further, for example, in an experimental setup.

  15. Influencing Academic Library Use in Tanzania: A Multiple Regression Analysis

    Directory of Open Access Journals (Sweden)

    Leocardia L Juventus

    2016-12-01

    Full Text Available Library use is influenced by many factors. This study uses a multiple regression analysis to ascertain the connection between the level of library use and a few of these factors based on the questionnaire responses from 158 undergraduate students who use academic libraries in two Tanzania’s universities: Muhimbili University of Health and Allied Sciences (MUHAS, and Hubert Kairuki Memorial University (HKMU. It has been discovered that users of academic libraries in Tanzania are influenced by the need to: search and access online materials, check for new books or other resources, check out books and other materials, and enjoy a friendly environment for study. However, their library use is not influenced by either the free wireless network, or consultation from librarians. It is argued that, academic libraries need to devise and implement plans that can make these libraries better learning environment and platforms to drive socio-economic developmentparticularly in developing nations such as Tanzania. It is further argued that, this can be enhanced through investment in modern academic library infrastructures.

  16. Open to Influence: What Counts as Academic Influence in Scholarly Networked "Twitter" Participation

    Science.gov (United States)

    Stewart, Bonnie

    2015-01-01

    Within the academy, signals of a scholar's academic influence are made manifest in indices like the "h"-index, which rank output. In open scholarly networks, however, signals of influence are less codified, and the ways in which they are enacted and understood have yet to be articulated. Yet the influence scholars cultivate in open…

  17. Influence of academic examination stress on hematological measurements in subjectively healthy volunteers.

    Science.gov (United States)

    Maes, M; Van Der Planken, M; Van Gastel, A; Bruyland, K; Van Hunsel, F; Neels, H; Hendriks, D; Wauters, A; Demedts, P; Janca, A; Scharpé, S

    1998-09-21

    Some recent reports showed that a brief exposure to a mental stressor during 3-20 min may induce hematological changes in humans. The aim of the present study was to examine the effects of academic examination stress on erythron variables, such as the number of red blood cells (RBC), hemoglobin (Hb), hematocrit (Ht), mean corpuscular volume (MCV), mean cell Hb (MCH), mean cell Hb concentration (MCHC), RBC distribution width (RDW), and serum iron and transferrin (Tf). The above variables were determined in 41 students in three conditions, i.e. the stress condition (the day before a difficult oral exam) and two baseline conditions, i.e. a few weeks earlier and later. At the same occasions, subjects completed the Perceived Stress Scale (PSS), the state version of the State-Trait Anxiety Inventory (STAI) and the Profile of Mood States (POMS). Academic examination stress significantly increased Ht, Hb, MCV, MCH and MCHC and significantly decreased RDW. There were significant relationships between the stress-induced changes in the PSS, STAI and POMS scores and those in Ht, Hb, MCV and MCH (allpositive) and RDW (negative). It is concluded that academic examination stress induces significant hematological changes indicative of an increased number of large RBC and increased hemoglobinisation, which cannot be explained by shifts of fluid out of the intravascular space, concentrating non-diffusible blood constituents.

  18. Academic stress differentially influences perceived stress, salivary cortisol, and immunoglobulin-A in undergraduate students.

    Science.gov (United States)

    Murphy, Lara; Denis, Randy; Ward, Christopher P; Tartar, Jaime L

    2010-07-01

    Academic examination stress is reported to increase physiological and self-report measures of stress and to decrease immune functioning. Here, we investigate biochemical and self-report measures of stress, immune functioning, and academic pressures before and during a midterm examination period. Undergraduate students were asked to complete a measure of global stress, the perceived stress scale (PSS-10), and to indicate their current level of perceived stress. They also answered questions regarding specific academic pressures and provided a saliva sample for cortisol and salivary immunoglobulin-A (S-IgA) quantification. Students showed increased salivary cortisol concentrations and also reported greater acute perceived stress during the examination period compared to the non-examination period. Although cortisol concentrations and perceived stress were significantly higher during the examination period, participants reported similar levels of global stress (PSS-10) during both testing sessions. Additional analyses showed a non-significant increase in the level of S-IgA from the non-examination period to the examination period. Specific pressure variables that appeared to contribute to stress regulation during the examination week included the amount of time spent studying and concern about the impact of examinations in the future. By demonstrating measures of chronic examination stress, these findings provide new insight into the complex relationship between examination stress, cortisol, and immune functioning.

  19. Factorial Analysis of Mass Media Influence on Academic Sports Development

    OpenAIRE

    Benar Noshin; Emami Mina; Eftekhari Ozra; Yeganeh Far Nastaran; Khan Mohammadi Ali Mohammad

    2016-01-01

    Purpose: Main objective of this research was factorial analysis of mass media influence on academic sports development. Material: Methodology of the research was descriptive- correlation. Population of the research was composed of all referees, coaches and athletes participating in students' sports Olympiad of Iran Payam e Noor Universities in year 2014. Statistical sample of research was chosen randomly and consisted of 176 persons. Data gathering tool was a researcher made questionnaire; it...

  20. Factorial Analysis of Mass Media Influence on Academic Sports Development

    Directory of Open Access Journals (Sweden)

    Benar Noshin

    2016-06-01

    Full Text Available Purpose: Main objective of this research was factorial analysis of mass media influence on academic sports development. Material: Methodology of the research was descriptive- correlation. Population of the research was composed of all referees, coaches and athletes participating in students' sports Olympiad of Iran Payam e Noor Universities in year 2014. Statistical sample of research was chosen randomly and consisted of 176 persons. Data gathering tool was a researcher made questionnaire; its superficial and content validity was approved by academic professors and media experts; also the stability of research tool was reported to be at an acceptable level. SPSS 23 software was used to analyze research data and also AMOS 24 software was used to analyze structure validity. Results: Findings showed there is a significant difference between current situation and desirable situation in all research dimensions. Also, factorial analysis of all research variables showed improvement of coaches' technical performance (0.86, improvement of referees' technical performance (0.85, and promotion of academic sport managers' awareness (0.83 respectively are mostly influenced by mass media. Conclusion : It should be kept in mind that academic sports development is one of the factors of the entire country sports development. Hence, it is crucial to attend to different dimensions of student sport's aspects such as human, financial, planning and etc., especially in championship area to be able to further macro objectives of country's sports development. Considering current conditions, mass media should have a new perspective on academic sports in order to be able to attend to their responsibilities to further the excellence of country's sports.

  1. Porcine stress syndrome (PSS) in Mangalitsa pigs

    OpenAIRE

    Stanišić, N.; Aleksić, S.; Di, L.; Stanimirović, Z.; Zhenhua, G.; Petrović, M.; Delić, N.; Radović, Č.; Parunović, N.; Gogić, M.

    2012-01-01

    Porcine stress syndrome (PSS) is one kind of molecular genetics defect which will cause malignant hyperthermia syndrome in pigs. It was reported that mutation of pig rynodine receptor (RYR1) gene is the main reason for PSS. The aim of this study was to test the RYR1 genotype of 10 Mangalitsa pigs using a polymerase chain reaction-restriction endonuclease fragment length polymorphism (PCR-RFLP) technique, which is a reliable and simple method for RYR1 gene t...

  2. Improved efficiency of organic solar cells using Au NPs incorporated into PEDOT:PSS buffer layer

    Science.gov (United States)

    Otieno, Francis; Shumbula, Ndivhuwo P.; Airo, Mildred; Mbuso, Mlambo; Moloto, Nosipho; Erasmus, Rudolph M.; Quandt, Alexander; Wamwangi, Daniel

    2017-08-01

    Au based plasmonic phenomenon inside the hole transport layer poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) of an organic solar cell based on blend of poly(3-hexylthiophene) (P3HT) and [6:6]-phenyl-C61-butyric acid (PCBM) is investigated. The concentration of the Au nanoparticles synthesized by wet chemical reduction is one of the key factors to strong light trapping when the spherical gold nanoparticles are blended into the PEDOT:PSS solution. Studies of the influence of the concentration of nanoparticles distribution in the PEDOT:PSS were carried out using UV-Vis spectroscopy and atomic force microscopy. Electrical characteristics of the pristine device and of device with metallic nanostructures were analyzed from J -V characteristics to observe the plasmonic effects on the performance in the P3HT:PCBM organic solar cells. The origin of the photocurrent enhancements with varying Au nanoparticles concentrations on PEDOT:PSS are discussed.

  3. The influence of academic stress and season on 24-hour concentrations of growth hormone and prolactin.

    Science.gov (United States)

    Malarkey, W B; Hall, J C; Pearl, D K; Kiecolt-Glaser, J K; Glaser, R

    1991-11-01

    Stress has been considered a physiological regulator of GH and PRL secretion in humans. The stressors used in studies have often been extreme. The influence of commonplace stressors on the endocrine system has not been clarified. Therefore, to better define the role of commonplace stressors on GH and PRL secretion, we evaluated the effect of examination stress on GH and PRL secretion in 37 male medical students. We performed hourly sampling for 24 h for GH and PRL 4 weeks before, during exam week, and 2 weeks after major examinations in the fall and spring of their first year. Stress, as evaluated by the Perceived Stress Scale (PSS), increased as expected during examination weeks, but there was no correlation between the PSS scores and mean day or night GH and PRL secretion. Twenty-four-hour GH and PRL secretion was not significantly altered during examinations in either fall or spring. A significant seasonal influence, however, was noted on GH secretion, with both daytime and nocturnal GH secretion being consistently higher in the Fall than in the Spring. We conclude that examination stress does not significantly influence mean daytime or nocturnal GH and PRL concentrations. We suggest that serum GH and PRL levels may not be significantly altered in man by commonplace stressors. Also, seasonal effects may be operative in the control of human GH secretion.

  4. Faculty and Peer Influences on Academic Integrity: College Cheating in Romania

    Science.gov (United States)

    Teodorescu, Daniel; Andrei, Tudorel

    2009-01-01

    The purpose of this research was to examine student perceptions of academic integrity among faculty and peers at a sample of public universities in Romania. The study explores the factors that influence academic dishonesty among college students and compares the relative importance of faculty influences and peer influences on students' intent to…

  5. The Influence of Selected Personality and Workplace Features on Burnout among Nurse Academics

    Science.gov (United States)

    Kizilci, Sevgi; Erdogan, Vesile; Sozen, Emine

    2012-01-01

    This study aimed to determine the influence of selected individual and situational features on burnout among nurse academics. The Maslach Burnout Inventory was used to assess the burnout levels of academics. The sample population comprised 94 female participant. The emotion exhaustion (EE) score of the nurse academics was 16.43[plus or minus]5.97,…

  6. PSS Case Book: A workbook in the PROTEUS series

    DEFF Research Database (Denmark)

    Neugebauer, Line Maria; Mougaard, Krestine; Andersen, Jakob Axel Bejbro

    The transformation process towards a PSS-oriented company is describes, through the presentation of the best pracice cases. Each case describes motivations, challenges, business models and PSS offerings....

  7. Academic Achievement Performance of University Students with Disability: Exploring the Influence of Non-Academic Factors

    Science.gov (United States)

    Dryer, Rachel; Henning, Marcus A.; Tyson, Graham A.; Shaw, Rosemary

    2016-01-01

    This study examined whether: (1) the non-academic constructs of psychological well-being, motivation to learn and quality of life (QOL) explained the variance in the academic achievement of students with disability; and (2) students with a mental health disability (MHD) differed from students with other disability on academic achievement and on…

  8. How Personal Factors Influence Academic Behavior and GPA in African American STEM Students

    National Research Council Canada - National Science Library

    Scherer, Stephen; Talley, Cheryl P; Fife, John E

    2017-01-01

    ...’ personal factors that influence academic behavior (PIAB) and, subsequently, achievement. This study aimed to expand the current literature by developing a new model to assess the influence of PIABs on student success.

  9. First selection, then influence : Developmental differences in friendship dynamics regarding academic achievement

    NARCIS (Netherlands)

    Gremmen, Mariola Claudia; Dijkstra, Jan Kornelis; Steglich, Christian; Veenstra, René

    This study concerns peer selection and influence dynamics in early adolescents' friendships regarding academic achievement. Using longitudinal social network analysis (RSiena), both selection and influence processes were investigated for students' average grades and their cluster-specific grades

  10. A Survey of the Influencing Factors for International Academic Mobility of Chinese University Students

    Science.gov (United States)

    Cao, Chun; Zhu, Chang; Meng, Qian

    2016-01-01

    This research aims to understand the factors influencing international academic mobility within the Chinese higher education context. The inventory of University Students' Perceptions of Influencing Factors for International Academic Mobility was developed and tested to enquire about Chinese university students' perceptions of factors influencing…

  11. A Tool for Conceptualising in PSS development

    DEFF Research Database (Denmark)

    Matzen, Detlef; McAloone, Timothy Charles

    2006-01-01

    International Design Conference [2]. In this contribution, we take the step from a fundamental understanding of the phenomenon to creating a normative exploitation of this understanding for PSS concept development. The developed modelling technique is based on the Customer Activity Cycle (CAC) model...... by Vandermerwe [3]. Our subsequent development and tailoring of this model has been carried out in repeated applications (and evolution) via a number of projects conducted by Design & Innovation (D&I) engineering students at The Technical University of Denmark (DTU). The documentation of these projects, foremost...... a recent project in the shipbuilding industry [4], represent the main data source for this paper. The resulting Activity Modelling Cycle (AMC) model has been refined and changed in order to address many of the issues identified as central for PSS development. The model has been found to support...

  12. Factors influencing the academic motivation of individual college students.

    Science.gov (United States)

    Yoshida, Masahiro; Tanaka, Masaaki; Mizuno, Kei; Ishii, Akira; Nozaki, Kumi; Urakawa, Ayako; Cho, Yuki; Kataoka, Yosky; Watanabe, Yasuyoshi

    2008-10-01

    Motivation is an important psychological concept in academic learning. Subjects performed jigsaw puzzle and square puzzle sessions (as difficulty variant task) and 80%, 50%, and 20% completion sessions (as completion variant task). After square puzzle or 20% completion sessions, subjective motivation decreased. Although baseline scores on an academic motivation scale were negatively correlated with changes in subjective motivation for the square puzzle session, a positive correlation was observed for the 20% completion session. These suggest that while continual completion of facile task trials may support the motivation of college students with lower academic motivation, attempting difficult task trials may sustain that of those with higher academic motivation.

  13. Influence of physical activity and aerobic capacity on academic performance in adolescence: a bibliographical review

    Directory of Open Access Journals (Sweden)

    José Carlos Escámez Baños

    2018-01-01

    Full Text Available Introduction: Adolescence proves to be a key age for acquiring and maintaining healthy habits. Nowadays, numerous research studies link physical activity practice with academic performance, as well as the physical fitness state and the body composition with academic performance. Objectives: Influence of cardiorespiratory capacity and BMI on academic achievement. Method: Various databases were analyzed, including PubMed and Google Scholar, choosing a total of 75 articles in the first selection, using a total of 18 finally. Results and conclusions: We can see a direct linear and positive relation between cardiorespiratory capacity during adolescence and academic achievement and a weak negative relation between obesity and academic success.

  14. The Influence of Academic Tracking on Adolescent Social Networks

    Science.gov (United States)

    Fisher, Kim W.; Shogren, Karrie A.

    2016-01-01

    This study examined adolescents' social capital, through social network analyses (i.e., ego network analyses), in two high schools where students were placed into academic tracks adopted by the schools and shaped by disability status (i.e., general education, co-taught, segregated special education classrooms). The impact of academic tracks, as…

  15. Personal Factors that Influence Deaf College Students' Academic Success

    Science.gov (United States)

    Albertini, John A.; Kelly, Ronald R.; Matchett, Mary Karol

    2012-01-01

    Research tells us that academic preparation is key to deaf students' success at college. Yet, that is not the whole story. Many academically prepared students drop out during their first year. This study identified entering deaf college students' personal factors as assessed by their individual responses to both the "Noel-Levitz College…

  16. The Influence Of Parental Background On Academic Performance Of ...

    African Journals Online (AJOL)

    This study was carried out to examine the relationship between parental background and academic performance of secondary school students. It was hypothesized that there is no significant difference between the academic performance of students from high socio-economic status background and those from low SES ...

  17. Fabrication of water-dispersible and highly conductive PSS-doped PANI/graphene nanocomposites using a high-molecular weight PSS dopant and their application in H2S detection

    Science.gov (United States)

    Cho, Sunghun; Lee, Jun Seop; Jun, Jaemoon; Kim, Sung Gun; Jang, Jyongsik

    2014-11-01

    This work describes the fabrication of poly(4-styrenesulfonic acid)-doped polyaniline/graphene (PSS-doped PANI/graphene) nanocomposites and their use as sensing elements for hydrogen sulfide (H2S) detection. PSS with a weight-average molecular weight (Mw) of 1.96 × 106 was synthesized using low-temperature free-radical polymerization. The PSS was used as both a doping agent and a binding agent for the polymerization of aniline monomers in a biphasic system (water-chloroform) at -50 °C. The high Mw of PSS resulted in relatively large particle sizes and smooth surfaces of the PSS-doped PANI. These physical characteristics, in turn, resulted in low interparticle resistance and high conductivity. In addition, the PSS allowed homogeneous dispersion of reduced graphene sheets through electrostatic repulsion. The prepared PSS-doped PANI/graphene solutions showed good compatibility with flexible poly(ethylene terephthalate) (PET) substrates, making them suitable for flexible sensor electrodes. Changes in the charge-transport properties, such as protonation level, conjugation length, crystalline structure, and charge-transfer resistance, of the electrode materials were the main factors influencing the electrical and sensor performance of the PSS-doped PANI-based electrodes. PSS-doped PANI/graphene composites containing 30 wt% graphene showed the highest conductivity (168.4 S cm-1) and the lowest minimum detection level (MDL) for H2S gas (1 ppm). This result is consistent with the observed improvements in charge transport in the electrode materials via strong π-π stacking interactions between the PANI and the graphene sheets.This work describes the fabrication of poly(4-styrenesulfonic acid)-doped polyaniline/graphene (PSS-doped PANI/graphene) nanocomposites and their use as sensing elements for hydrogen sulfide (H2S) detection. PSS with a weight-average molecular weight (Mw) of 1.96 × 106 was synthesized using low-temperature free-radical polymerization. The PSS was

  18. Influence of attitudes toward curriculum on dishonest academic behavior.

    Science.gov (United States)

    Austin, Zubin; Collins, David; Remillard, Alfred; Kelcher, Sheila; Chui, Stephanie

    2006-06-15

    The objective of this study was to examine possible associations between students' self-reported behaviors and opinions towards academic dishonesty, and their attitudes towards curriculum, assessment, and teaching within the pharmacy program. A questionnaire was developed and distributed to undergraduate (pre-licensure) students at 4 schools of pharmacy in Canada, including students enrolled in the international pharmacy graduate program. More than 80% of respondents indicated they had participated in one or more of the act of academic dishonesty described in the questionnaire. A weak to moderate correlation was found between students' attitudes towards pharmacy education and their self-reported behaviors related to academic dishonesty. This study confirmed previous findings suggesting widespread academic dishonesty as well as a hierarchy of values with respect to students' perceptions regarding severity and importance of academic dishonesty. Despite methodological limitations inherent in examining academic dishonesty, there is a definite need to continue to examine this important issue. While this study indicated only a moderate correlation between attitudes towards curriculum and dishonest behaviors, the problem of academic misconduct is multifactorial and will require ongoing study.

  19. Personal factors that influence deaf college students' academic success.

    Science.gov (United States)

    Albertini, John A; Kelly, Ronald R; Matchett, Mary Karol

    2012-01-01

    Research tells us that academic preparation is key to deaf students' success at college. Yet, that is not the whole story. Many academically prepared students drop out during their first year. This study identified entering deaf college students' personal factors as assessed by their individual responses to both the Noel-Levitz College Student Inventory Form B and the Learning and Study Strategies Inventory, second edition (LASSI). Entering students in 3 successive cohorts (total n =437) participated in this study. Results show that in addition to entry measurements of reading and mathematic skills, personal factors contributed to the academic performance of students in their first quarter in college. The Noel-Levitz provided the comparatively better predictive value of academic performance: Motivation for Academic Study Scale (e.g., desire to finish college). The LASSI also showed statistically significant predictors, the Self-Regulation Component (e.g., time management) and Will Component (e.g., self-discipline), but accounted for relatively less variability in the students' initial grade point averages. For this group of underprepared students, results show that personal factors can play a significant role in academic success. Deaf students' personal factors are discussed as they relate to other first-year college students and to their subsequent academic performance and persistence.

  20. Influence of Attitudes Toward Curriculum on Dishonest Academic Behavior

    Science.gov (United States)

    Austin, Zubin; Collins, David; Remillard, Alfred; Kelcher, Sheila; Chui, Stephanie

    2006-01-01

    Objectives The objective of this study was to examine possible associations between students' self-reported behaviors and opinions towards academic dishonesty, and their attitudes towards curriculum, assessment, and teaching within the pharmacy program. Methods A questionnaire was developed and distributed to undergraduate (pre-licensure) students at 4 schools of pharmacy in Canada, including students enrolled in the international pharmacy graduate program. Results More than 80% of respondents indicated they had participated in one or more of the act of academic dishonesty described in the questionnaire. A weak to moderate correlation was found between students' attitudes towards pharmacy education and their self-reported behaviors related to academic dishonesty. Conclusions This study confirmed previous findings suggesting widespread academic dishonesty as well as a hierarchy of values with respect to students' perceptions regarding severity and importance of academic dishonesty. Despite methodological limitations inherent in examining academic dishonesty, there is a definite need to continue to examine this important issue. While this study indicated only a moderate correlation between attitudes towards curriculum and dishonest behaviors, the problem of academic misconduct is multifactorial and will require ongoing study. PMID:17136171

  1. Moving away from exhaustion: how core self-evaluations influence academic burnout.

    Science.gov (United States)

    Lian, Penghu; Sun, Yunfeng; Ji, Zhigang; Li, Hanzhong; Peng, Jiaxi

    2014-01-01

    Academic burnout refers to students who have low interest, lack of motivation, and tiredness in studying. Studies concerning how to prevent academic burnout are rare. The present study aimed to investigate the impact of core self-evaluations on the academic burnout of university students, and mainly focused on the confirmation of the mediator role of life satisfaction. A total of 470 university students accomplished the core self-evaluation scale, Satisfaction with Life, and academic burnout scale. Both core self-evaluations and life satisfaction were significantly correlated with academic burnout. Structural equation modeling indicated that life satisfaction partially mediated the relationship between core self-evaluations and academic burnout. Core self-evaluations significantly influence academic burnout and are partially mediated by life satisfaction.

  2. Moving away from exhaustion: how core self-evaluations influence academic burnout.

    Directory of Open Access Journals (Sweden)

    Penghu Lian

    Full Text Available BACKGROUND: Academic burnout refers to students who have low interest, lack of motivation, and tiredness in studying. Studies concerning how to prevent academic burnout are rare. OBJECTIVE: The present study aimed to investigate the impact of core self-evaluations on the academic burnout of university students, and mainly focused on the confirmation of the mediator role of life satisfaction. METHODS: A total of 470 university students accomplished the core self-evaluation scale, Satisfaction with Life, and academic burnout scale. RESULTS: Both core self-evaluations and life satisfaction were significantly correlated with academic burnout. Structural equation modeling indicated that life satisfaction partially mediated the relationship between core self-evaluations and academic burnout. CONCLUSIONS: Core self-evaluations significantly influence academic burnout and are partially mediated by life satisfaction.

  3. Influence of Facebook in Academic Performance of Sri Lankan University Students

    OpenAIRE

    Thuseethan, S.; Kuhanesan, S.

    2015-01-01

    Facebook is only an electronic communication between human but unfortunately it has become an addiction for all. This paper examines the usage of Facebook among university students and its influence in their academic performance. The impact of Facebook can either be good or bad on university students and in their academic activities. Even though a closer look on the real impact of Facebook reveals that it leads to several problems in university students academic performances. Today Facebook i...

  4. Influence of sedentary lifestyle on academic performance in adolescence: a bibliographical review

    Directory of Open Access Journals (Sweden)

    José Carlos Escámez Baños

    2018-02-01

    Full Text Available Adolescence proves to be a key age for acquiring and maintaining healthy habits. Nowadays, numerous research studies link physical activity practice with academic performance, as well as the physical fitness state and the body composition with academic achievement. Objective: Review the grade of influence of physical-sport activity on the variable academic performance and to know the influence of sedentary lifestyle on academic performance. Method: For this purpose, various databases were analyzed, including PubMed and Google Scholar, choosing a total of 75 articles in the first selection, using a total of 18 finally. Results and Conclusions: In terms of results and conclusions, we can see how physical activity practice has a positive influence on academic performance, being the recommended time 30-60 minutes daily.

  5. Vice-Chancellors Influence on Academic Staff Intentions to Use ...

    African Journals Online (AJOL)

    kmacharia

    Wannemacher, 2006). Consequently, universities must face the challenge in having to get academic staff to adopt and make effective use of them in teaching and learning since technology rejection is common. (Davis F. D., 1989; Davis, Bagozzi, ...

  6. Factors Caribbean Overseas Students Perceive Influence Their Academic Self-Efficacy

    Science.gov (United States)

    Edwards-Joseph, Arline; Baker, Stanley

    2014-01-01

    This study investigated factors that influenced the academic self-efficacy of Caribbean overseas students attending universities in the United States, and the themes that emerged from their perceptions of variables impacting their academic self-efficacy. Seven major themes (educational background, faith in God, finances, age and maturity,…

  7. The Relative Influences of Neutralizing Behavior and Subcultural Values on Academic Dishonesty

    Science.gov (United States)

    Curasi, Carolyn F.

    2013-01-01

    The author examined the influence of neutralizing techniques and subcultural values on academic dishonesty using a sample of 327 ethnically diverse business majors. Findings suggest that both neutralizing behavior and subcultural norms are correlated with academic dishonesty; however, neutralization techniques have a stronger association. Findings…

  8. The Influence of Academic Culture on Quality Management System ISO 9001 Maintenance within Malaysian Universities

    Science.gov (United States)

    Basir, Siti Arni; Davies, John; Douglas, Jacqueline; Douglas, Alexander

    2017-01-01

    This study investigates the influence of the elements of academic culture on quality management system ISO 9001 maintenance within Malaysian universities. There is a dearth of empirical studies on maintaining ISO 9001, particularly in the higher education context. From the literature review, academic culture was classified according to four…

  9. The Components of Communication Systems in Universities: Their Influence on Academic Work Life

    Science.gov (United States)

    Uslu, Baris

    2018-01-01

    This research aimed to identify the components of communication systems in universities and to explore their influence on academic life. To collect data, interviews were carried out with academics from Australian universities. Thematic descriptive and content analyses were performed on the data-set. Analyses showed that the human relations unit,…

  10. Limitations on Change: Current Conditions Influencing Academic Intransigence in Educational Administration Programs.

    Science.gov (United States)

    Logan, Connie Stokes; Pounder, Diana G.

    An analysis of academic intransigence (resistance to change) in educational administrative preparation programs is presented in this paper. Drawing upon two conceptual frameworks, the stakeholder perspective and Porter's (1980) five-force model of industry structure and competitive influence, two factors contributing to academic intransigence are…

  11. The Influence of Daily Structured Physical Activity on Academic Progress of Elementary Students with Intellectual Disabilities

    Science.gov (United States)

    Everhart, Brett; Dimon, Chelsea; Stone, Danielle; Desmond, Deborah; Casilio, Mary

    2012-01-01

    Recent evidence suggests regular physical activity can positively influence academic performance. Although, little has been published on physical activity's impact on academic performance of students with intellectual disabilities, research shows the impact on brain and cognitive function of movement and physical activity. In this study, seven…

  12. Understanding the Capacitance of PEDOT:PSS

    DEFF Research Database (Denmark)

    Volkov, Anton V.; Wijeratne, Kosala; Mitraka, Evangelia

    2017-01-01

    -converters. In spite of its long-term use as a material for storage and transport of charges, the fundamentals of its bulk capacitance remain poorly understood. Generally, charge storage in supercapacitors is due to formation of electrical double layers or redox reactions, and it is widely accepted that PEDOT......:PSS belongs to the latter category. Herein, experimental evidence and theoretical modeling results are reported that significantly depart from this commonly accepted picture. By applying a two-phase, 2D modeling approach it is demonstrated that the major contribution to the capacitance of the two-phase PEDOT...

  13. Influences on Academic Achievement: A Comparison of Results from Uganda and More Industrialized Societies.

    Science.gov (United States)

    Heyneman, Stephen P.

    Findings in industrialized countries, such as those of Jencks and Coleman, indicate that socioeconomic status has a strong influence on academic achievement and that school effects are of lesser importance. This study of socioeconomic influences and school influences on the performance of 23,615 Ugandan children taking the Primary Leaving…

  14. Influence of Mothers' Parenting Styles on Self-Regulated Academic Learning among Saudi Primary School Students

    Science.gov (United States)

    Alnafea, Tahany; Curtis, David D.

    2017-01-01

    Much of the research on self-regulation has investigated the influence of school settings. However, fewer studies have concentrated on the home environment and its influence on student's academic behaviour in school. The present research investigates the influence of mothers' parenting styles on students' self-regulated learning behaviours in…

  15. The Influence of Presage and Study Processes on Academic Success of Undergraduate Turkish Students

    OpenAIRE

    Suphi, Nilgün

    2012-01-01

    ABSTRACT: The aim of the research was to make a preformative evaluation on which presage (personal and institutional) factors have the strongest influence on the learning process factors and academic achievement and which learning process factors have the strongest influence on academic achievement of the 2nd, 3rd and 4th year Turkish undergraduate students studying in the Faculty of Education in the Eastern Mediterranean University in one of the following programs: Guidance and Psychologica...

  16. Factors influencing young urologists' productivity and academic career choice.

    Science.gov (United States)

    Resorlu, Berkan; Silay, Mesrur Selcuk; Onem, Kadir; Bayrak, Omer; Sonbahar, Adil Emrah; Acar, Omer; Ergun, Osman; Celik, Orcun; Tefik, Tzevat; Firdolas, Fatih; Tandogdu, Zafer

    2016-01-01

    The objective of this study is to identify the variables that affect young urologists' productivity and academic career choice. We have conducted an internet-based national survey for urologists randomly sampled from the database of Turkish Urological Association and 110 physicians completed this survey. Participants were asked to answer three-page questionnaire including 37 questions, which takes around 5 min to complete. Questionnaire was consisting of four main sections: 'demography', 'education', 'working conditions' and 'quality of life'. Increased dedicated research time, being interested in an academic career, being Fellow of the European Board of Urology (FEBU), having English proficiency, and greater numbers of manuscript publication during residency were associated with increased productivity after residency (p = 0.001, p = 0.028, p = 0.046, p<0.001 and p<0.001, respectively). The remaining variables including age at marriage, age at having a child, monthly salary, length of residency, having a mentor or role model during residency showed no significant relationship with manuscript publications. Twenty-nine physicians (26.4%) stated that they had once been interested in their residency but were no longer interested in academic urology. Reasons for this loss of academic interest included lack of effective mentor or role model (27.2%), bureaucracy (17%), financial issues (13.6%), mandatory rule to work in public hospitals (18.2%) or military hospitals (9%) and language problems (21.6%). Our data indicate that increased time spent for research, being interested in an academic career, being an FEBU, having English proficiency, and greater publication during residency were associated with increased numbers of publications and academic career choice.

  17. Generational influences in academic emergency medicine: structure, function, and culture (Part II).

    Science.gov (United States)

    Mohr, Nicholas M; Smith-Coggins, Rebecca; Larrabee, Hollynn; Dyne, Pamela L; Promes, Susan B

    2011-02-01

    Strategies for approaching generational issues that affect teaching and learning, mentoring, and technology in emergency medicine (EM) have been reported. Tactics to address generational influences involving the structure and function of the academic emergency department (ED), organizational culture, and EM schedule have not been published. Through a review of the literature and consensus by modified Delphi methodology of the Society for Academic Emergency Medicine Aging and Generational Issues Task Force, the authors have developed this two-part series to address generational issues present in academic EM. Understanding generational characteristics and mitigating strategies can address some common issues encountered in academic EM. By understanding the differences and strengths of each of the cohorts in academic EM departments and considering simple mitigating strategies, faculty leaders can maximize their cooperative effectiveness and face the challenges of a new millennium. © 2011 by the Society for Academic Emergency Medicine.

  18. Hellfire and Academic Dishonesty: An Empirical Evaluation of the Influence of Religious Orientation on Academic Deviance

    Science.gov (United States)

    Jolicoeur, Jason R.

    2010-01-01

    Academic dishonesty has long been considered a critical issue that threatens to undermine the very integrity of the educational process. This issue has taken on increased importance in an era in which higher education that has been characterized by calls for increased institutional accountability. While past studies have shed light on the issue of…

  19. Academic motivation mediates the influence of temporal discounting on academic achievement during adolescence

    NARCIS (Netherlands)

    Lee, N.C.; Krabbendam, L.; Dekker, S.J.; Boschloo, A.M.; de Groot, R.H.M.; Jolles, J.

    2012-01-01

    This study investigated the relationship between academic achievement and temporal discounting, a behavioural measurement of delay of gratification abilities, in N=638 12-18 year old adolescents. Neuroscience studies have demonstrated protracted development of the brain areas involved in delaying

  20. the influence of instructional materials on academic performance of ...

    African Journals Online (AJOL)

    students' academic performance in senior secondary school Chemistry in Cross River State. A two group pre-test post test ... significant level while the Pearson product moment correlation coefficient at that level was used to analyse the research ... that;a professionally qualified science teacher no matter how well trained ...

  1. Vice-Chancellors Influence on Academic Staff Intentions to Use ...

    African Journals Online (AJOL)

    kmacharia

    adoption and diffusion of Learning Management System (LMS) by academic staff for teaching and learning ... response to the web-based Learning Management System (LMS) for instructional and course delivery in ..... environment, where the VC is the project champion with a clear vision and offers project leadership.

  2. Influence of Public Relations and Reference Services on Academic ...

    African Journals Online (AJOL)

    Information Impact | Vol. 6(1) June, 2015. Introduction. In academic institutions the library occupies a central position and the services offered are inextricably tied to ..... Wyer J.J (2009) Administration functions and evaluation of reference books. Encyclopedia of library and. Information Science. Vol 8(4): 146. Rose Ojohwoh.

  3. Factors influencing the job satisfaction of academics in higher ...

    African Journals Online (AJOL)

    Since there has not been much research focus on job satisfaction in Higher Education in South Africa, this article describes the job satisfaction of these academics in times of transformation. A survey design involved 94 respondents from similar departments at a residential and a distance education institution.

  4. Factors influencing academic performance of real estate students in Nigeria

    NARCIS (Netherlands)

    Ayodele, Timothy Oluwafemi; Oladokun, Timothy Tunde; Gbadegesin, J.T.

    2016-01-01

    Purpose: The purpose of this paper is to examine the factors affecting academic performance of real estate students in a developing country like Nigeria. Design/methodology/approach: Data for the study were collected with the aid of questionnaire served on 152 final year real estate students of

  5. Influence of environmental health services on students' academic ...

    African Journals Online (AJOL)

    The study investigated the effect of environmental health services on students' academic performance in secondary schools in Brass Local Government Area of Bayelsa State. The study adopted the descriptive survey design. The sample for the study comprised a total of 245 students and 59 teachers, amounting to 304 ...

  6. Solution-processed MoO3:PEDOT:PSS hybrid hole transporting layer for inverted polymer solar cells.

    Science.gov (United States)

    Wang, Yiling; Luo, Qun; Wu, Na; Wang, Qiankun; Zhu, Hongfei; Chen, Liwei; Li, Yan-Qing; Luo, Liqiang; Ma, Chang-Qi

    2015-04-08

    Solution-processed organic-inorganic hybrids composing of MoO3 nanoparticles and PEDOT:PSS were developed for use in inverted organic solar cells as hole transporting layer (HTL). The hybrid MoO3:PEDOT:PSS inks were prepared by simply mixing PEDOT:PSS aqueous and MoO3 ethanol suspension together. A core-shell structure was proposed in the MoO3:PEDOT:PSS hybrid ink, where PEDOT chains act as the core and MoO3 nanoparticles connected with PSS chains act as the composite shell. The mixing with PEDOT:PSS suppressed the aggregation of MoO3 nanoparticles, which led to a smoother surface. In addition, since the hydrophilic PSS chains were passivated through preferentially connection with MoO3, the stronger adhesion between MoO3 nanoparticles and the photoactive layer improved the film forming ability of the MoO3:PEDOT:PSS hybrid ink. The MoO3:PEDOT:PSS hybrid HTL can therefore be feasibly deposited onto the hydrophobic photoactive polymer layer without any surface treatment. The use of the MoO3:PEDOT:PSS hybrid HTL resulted in the optimized P3HT:PC61BM- and PTB7:PC61BM-based inverted organic solar cells reaching highest power conversion efficiencies of 3.29% and 5.92%, respectively, which were comparable with that of the control devices using thermally evaporated MoO3 HTL (3.05% and 6.01%, respectively). Furthermore, less HTL thickness dependence of device performance was found for the hybrid HTL-based devices, which makes it more compatible with roll-to-roll printing process. In the end, influence of the blend ratio of MoO3 to PEDOT:PSS on photovoltaic performance and device stability was studied carefully, results indicated that the device performance would decrease with the increase of MoO3 blended ratio, whereas the long-term stability was improved.

  7. THE INFLUENCE OF THE SOCIOMETRIC STATUS OF STUDENTS ON ACADEMIC ACHIEVEMENT

    Directory of Open Access Journals (Sweden)

    Camelia Soponaru

    2014-11-01

    Full Text Available The mission, desire and preoccupation of each teacher are or should be to ensure academic achievement for each student, by mobilizing all necessary resources. We observe the academic achievement through a variety of educational finalities, and involving socio-affective and personality dimensions indispensable for an effective functioning of the individual within the community. The objective of the research is to underline the influence of the sociometric status of students upon academic achievement. We formulated the hypotheses that positive sociometric status is associated with academic achievement, while negative sociometric status is associated with academic failure. In order to assess them, we applied a three-item sociometric test, and we elaborated the sociomatrices and the sociograms for each group/class in order to extract the annual qualifications for the students within the investigated sample from class registers; afterwards, we carried out the statistical analysis of the data. The findings partially confirm the working hypotheses. Overall, we found a significant relation between the sociometric status of students and academic achievement. A difference was found between students with a positive status and those with zero sociometric status, from the perspective of academic achievement. The investigation revealed that the gender variable has no significant influence on the degree of the relation between sociometric status and academic achievement; while the degree / the stage of schooling variable has a moderating role.

  8. Directives to support the design of changeable (I)PSS

    NARCIS (Netherlands)

    Pereira Pessoa, Marcus Vinicius; Jauregui Becker, Juan Manuel; Maier, Anja; Skec, Stanko; Kim, Harrison; Kokkolaras, Michael; Oehmen, Josef; Fadel, Georges; Salustri, Filippo; Van der Loos, Mike

    2017-01-01

    Product service models (PSM) benefits are not limited to its providers and costumers, but the whole society might also take advantage from its sustainability impact. Achieving these benefits, though, require changeable product service systems ((I)PSS). Changeability means the (I)PSS' modules have

  9. The Curious Out-of-Plane Conductivity of PEDOT : PSS

    NARCIS (Netherlands)

    van de Ruit, Kevin; Katsouras, Ilias; Bollen, Dirk; van Mol, Ton; Janssen, Rene A. J.; de Leeuw, Dago M.; Kemerink, Martijn

    2013-01-01

    For its application as transparent conductor in light-emitting diodes and photovoltaic cells, both the in-plane and out-of-plane conductivity of PEDOT:PSS are important. However, studies into the conductivity of PEDOT:PSS rarely address the out-of-plane conductivity and those that do, report widely

  10. Influence of Teaching Methods on Academic Achievement and Differences of Academic Achievement between Social Classes : Beyond the Binary Opposition of "New" and "Traditional" Views on Academic Achievement

    OpenAIRE

    須藤, 康介; Kosuke, SUDO; 東京大学大学院; Graduate School,The University of Tokyo

    2007-01-01

    The purpose of this paper is to grasp how science is taught in Japanese junior high schools, and to show the influences of teaching methods on academic achievement and differences between social classes, using the data of TIMSS2003. It is found that science lessons in junior high schools are taught using four teaching methods: the experiment-investigation method, society-daily life method, homework-examination method, and hearing-practice method, as well as combinations of these methods. They...

  11. Improved efficiency of organic solar cells using Au NPs incorporated into PEDOT:PSS buffer layer

    Directory of Open Access Journals (Sweden)

    Francis Otieno

    2017-08-01

    Full Text Available Au based plasmonic phenomenon inside the hole transport layer poly(3,4-ethylenedioxythiophene-poly(styrenesulfonate (PEDOT:PSS of an organic solar cell based on blend of poly(3-hexylthiophene (P3HT and [6:6]-phenyl-C61-butyric acid (PCBM is investigated. The concentration of the Au nanoparticles synthesized by wet chemical reduction is one of the key factors to strong light trapping when the spherical gold nanoparticles are blended into the PEDOT:PSS solution. Studies of the influence of the concentration of nanoparticles distribution in the PEDOT:PSS were carried out using UV–Vis spectroscopy and atomic force microscopy. Electrical characteristics of the pristine device and of device with metallic nanostructures were analyzed from J –V characteristics to observe the plasmonic effects on the performance in the P3HT:PCBM organic solar cells. The origin of the photocurrent enhancements with varying Au nanoparticles concentrations on PEDOT:PSS are discussed.

  12. PEDOT:PSS/Graphene Nanocomposite Hole-Injection Layer in Polymer Light-Emitting Diodes

    Directory of Open Access Journals (Sweden)

    Chun-Hsuan Lin

    2012-01-01

    Full Text Available We report on effects of doping graphene in poly(3,4-ethylenedioxythiophene: poly(styrene sulfonate, PEDOT:PSS, as a PEDOT:PSS/graphene nanocomposite hole injection layer on the performance enhancement of polymer light-emitting diodes (PLEDs. Graphene oxides were first synthesized and then mixed in the PEDOT:PSS solution with specifically various amounts. Graphenes were reduced in the PEDOT:PSS matrix through thermal reduction. PLED devices with hole-injection nanocomposite layer containing particular doping concentration were fabricated, and the influence of doping concentration on device performance was examined by systematically characterizations of various device properties. Through the graphene doping, the resistance in the hole-injection layer and the turn-on voltage could be effectively reduced that benefited the injection and transport of holes and resulted in a higher overall efficiency. The conductivity of the hole-injection layer was monotonically increased with the increase of doping concentration, performance indices from various aspects, however, did not show the same dependence because faster injected holes might alter not only the balance of holes and electrons but also their combination locations in the light-emitting layer. Results show that optimal doping concentration was the case with 0.03 wt% of graphene oxide.

  13. The influence of childhood maltreatment on adolescents’ academic performance

    OpenAIRE

    Slade, Eric P.; Wissow, Lawrence S.

    2007-01-01

    Evidence that childhood maltreatment is associated with emotional and behavioral problems throughout childhood suggests that maltreatment could lead to impaired academic performance in middle and high school. This article explores these effects using data on siblings. An index measure of the intensity of childhood maltreatment was included as a covariate in multivariate analyses of adolescents’ risk for school performance impairments. Family fixed effects were used to control for unobservable...

  14. Learning and study strategies and their influence on academic performance

    OpenAIRE

    Perera, Suresh

    2017-01-01

    This study investigated the differences between high and low academic achieving students of Monash College in terms oftheir learning and study strategies related to the Skill, Will and Self-regulation components of strategic learning. A total of 258 students participated in the study by completing the 2"d edition of the Learning and Study Strategies Inventory (LASSI). Results indicated that there were significant differences in the way high and low achievers learn and study, which is consiste...

  15. Can the Language of Tenure Criteria Influence Women's Academic Advancement?

    Science.gov (United States)

    Marchant, Angela; Bhattacharya, Abhik; Carnes, Molly

    2007-09-01

    Women are not advancing to leadership positions in academic medicine at rates predicted by their representation in medical school over the past 20 years. The prejudice persists, often as an unconscious mental model, that leaders should be men. We examined whether the presence of the word "leader" in written tenure criteria may have a differential impact on promotion of men and women in elite medical schools. We used a retrospective, descriptive design to study 24 academic medical centers top-ranked in both NIH funding and Carnegie classification. The main outcome measure was the slope of regression fit to 7-year annual data on percent faculty who are tenured women (1998-2004) relative to the median slope of all 24 institutions. Medical schools with the word "leader" in tenure criteria were more likely to have slopes below the median slope than schools without the word "leader" (OR = 6.0; CI = 1.02, 35.37; p = 0.04). Being a leader is associated with stereotypic male-gendered traits. Achieving tenure is a key gatekeeping point in advancement toward leadership in academic medicine. Our findings suggest that including the word "leader" in tenure criteria may promote activation and application of biases that disadvantage women's career advancement.

  16. The empowerment potential of public sector software (PSS

    Directory of Open Access Journals (Sweden)

    Pradip Ninan Thomas

    2012-03-01

    Full Text Available Investigations into the potential for public sector software (PSS to empower citizens are at a very nascent stage. This article explores the theoretical basis for, and practical advantages of, PSS, in the making of an informed and pro-active citizenry. Using the example of the emerging PSS movement in India and in particular the ICT literacy movement in Kerala, South India, it argues, that access to and use of software based on the principles of free and open source has the potential to contribute to an empowered citizenry. However the very concept of PSS is contested by major private software companies given that they stand to lose from public investments that are based on open standards. The article argues that PSS can contribute to the making of an ‘information commons’ and that the need of the hour is for innovative and creative solutions to the information deficits faced by communities in India and elsewhere.

  17. First Selection, Then Influence: Developmental Differences in Friendship Dynamics Regarding Academic Achievement

    Science.gov (United States)

    Gremmen, Mariola Claudia; Dijkstra, Jan Kornelis; Steglich, Christian; Veenstra, René

    2017-01-01

    This study concerns peer selection and influence dynamics in early adolescents' friendships regarding academic achievement. Using longitudinal social network analysis (RSiena), both selection and influence processes were investigated for students' average grades and their cluster-specific grades (i.e., language, exact, and social cluster). Data…

  18. Academic Achievement as a Moderator of Genetic Influences on Alcohol Use in Adolescence

    OpenAIRE

    Benner, Aprile D.; Kretsch, Natalie; Harden, K. Paige; Crosnoe, Robert

    2013-01-01

    Prior research suggests a link between academic performance and alcohol use during adolescence, but the degree to which this association reflects actual protective effects continues to be debated. We investigated the role of genetic factors in the association between academic achievement and adolescent alcohol use and whether achievement might constrain the translation of genetic influences on drinking into actual behavior (a Gene × Environment interaction). Analysis of twin data from Add Hea...

  19. Cardiorespiratory Fitness and Muscular Strength as Mediators of the Influence of Fatness on Academic Achievement.

    Science.gov (United States)

    García-Hermoso, Antonio; Esteban-Cornejo, Irene; Olloquequi, Jordi; Ramírez-Vélez, Robinson

    2017-08-01

    To examine the combined association of fatness and physical fitness components (cardiorespiratory fitness [CRF] and muscular strength) with academic achievement, and to determine whether CRF and muscular strength are mediators of the association between fatness and academic achievement in a nationally representative sample of adolescents from Chile. Data were obtained for a sample of 36 870 adolescents (mean age, 13.8 years; 55.2% boys) from the Chilean System for the Assessment of Educational Quality test for eighth grade in 2011, 2013, and 2014. Physical fitness tests included CRF (20-m shuttle run) and muscular strength (standing long jump). Weight, height, and waist circumference were assessed, and body mass index and waist circumference-to-height ratio were calculated. Academic achievement in language and mathematics was assessed using standardized tests. The PROCESS script developed by Hayes was used for mediation analysis. Compared with unfit and high-fatness adolescents, fit and low-fatness adolescents had significantly higher odds for attaining high academic achievement in language and mathematics. However, in language, unfit and low-fatness adolescents did not have significantly higher odds for obtaining high academic achievement. Those with high fatness had higher academic achievement (both language and mathematics) if they were fit. Linear regression models suggest a partial or full mediation of physical fitness in the association of fatness variables with academic achievement. CRF and muscular strength may attenuate or even counteract the adverse influence of fatness on academic achievement in adolescents. Copyright © 2017 Elsevier Inc. All rights reserved.

  20. The influence of academic stress on gingival inflammation.

    Science.gov (United States)

    Johannsen, A; Bjurshammar, N; Gustafsson, A

    2010-02-01

    The aim of the present study was to investigate the effects of academic stress on periodontal health, in relation to inflammatory markers in gingival crevicular fluid (GCF) and cortisol in saliva. The study included 20 healthy dental hygienists (females: mean age 29.3 +/- 8.5 SD) and was conducted during a major exam period and 4 weeks later after the exams. A clinical examination was performed and GCF was collected from four sites in each subject on these two occasions. Interleukin (IL)-1beta, IL-4, IL-6, IL-10 levels were determined using Luminex 100 and cortisol amounts by radioimmunoassay (RIA (125)I). Students registered their perceived stress on a visual analogue scale (VAS). Significance of the findings was determined using paired t-test, Wilcoxon-matched pair and Spearman's rank correlations. Students had higher amounts of dental plaque (P exam period compared with after the exams. The amounts of IL-6 and IL-10 in GCF were significantly increased during the time of examinations. The median level of cortisol in saliva was also significantly raised during the exam period compared with after the exams, 20.52 nmol/l (range: 11.91-27.34) and 16.41 nmol/l (range: 10.91-24.17) respectively, P Academic stress appears to affect periodontal health, shown by more plaque accumulation, gingival inflammation and increased amounts of IL-6, IL-10 in GCF and cortisol in saliva.

  1. The influence of childhood maltreatment on adolescents' academic performance.

    Science.gov (United States)

    Slade, Eric P; Wissow, Lawrence S

    2007-10-01

    Evidence that childhood maltreatment is associated with emotional and behavioral problems throughout childhood suggests that maltreatment could lead to impaired academic performance in middle and high school. This article explores these effects using data on siblings. An index measure of the intensity of childhood maltreatment was included as a covariate in multivariate analyses of adolescents' risk for school performance impairments. Family fixed effects were used to control for unobservables linked to family background and neighborhood effects. More intense childhood maltreatment was associated with greater probability of having a low GPA (P=0.001) and problems completing homework assignments (P=0.007). Associations between maltreatment intensity and adolescent school performance were not sensitive to model specification. Additional analyses suggested that maltreatment effects are moderated by cognitive deficits related to attention problems. The implications of these findings for educators and schools are discussed.

  2. Graphene oxide/PEDOT:PSS and reduced graphene oxide/PEDOT:PSS hole extraction layers in organic photovoltaic cells

    Energy Technology Data Exchange (ETDEWEB)

    Park, Yensil; Choi, Kyoung Soon; Kim, Soo Young [School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul (Korea, Republic of)

    2012-07-15

    A comparison was made between the use of graphene oxide (GO)/poly(ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and reduced graphene oxide (rGO)/PEDOT:PSS as a hole extraction layer (HEL) in organic photovoltaic (OPV) cells. Hydrazine hydrate (HYD) and the thermal method were adopted to change the GO to rGO. The OPV cell with the GO ({proportional_to}2 nm)/PEDOT:PSS HEL exhibits a power conversion efficiency (PCE) as high as 3.53% under 100 mW/cm{sup 2} illumination and air mass conditions, which is higher than that of the OPV cell without the HEL, viz. 1.78%. The device with the PEDOT:PSS/GO HEL shows a similar PCE of 3.48%. However, the PCE of the OPV cell with the rGO/PEDOT:PSS HEL is not high as those of the cells with the HYD-rGO/PEDOT:PSS and T-rGO/PEDOT:PSS, viz. 3.3 and 3.37%, respectively. The work function of GO was 4.7 eV, but those of HYD-rGO and T-rGO were 4.2 and 4.5 eV, respectively, suggesting that the decrease of the barrier height between GO and active materials is higher than that in rGO case. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  3. Script Towards Research 2.0: The Influence of Digital and Online Tools in Academic Research

    Directory of Open Access Journals (Sweden)

    Gabriela Grosseck

    2016-07-01

    Full Text Available The new Internet technologies have infiltrated in a stunning way the academic environment, both at individual and at institutional level. Therefore, more and more teachers have started educational blogs, librarians are active on Twitter, other educational actors curate web content, students post on Instagram or Flickr, and university departments have Facebook pages and/or YouTube accounts etc. Today, the use of web technology has become “a legitimate activity in many areas of higher education” (Waycott, 2010 and a considerable shift to digital academic research has gradually occurred. Teachers are encouraging students to take up digital tools for research and writing, thus revealing new ways of using information and communication technologies for academic purposes and not just for socializing. The main objective of this paper is to investigate the effects of integrating diverse digital, Web 2.0 tools and resources and OERs/MOOCs in research and in the construction of students’ academic texts. We aim to stress the increasing influence of digital and online tools in academic research and writing. Teachers, specialists, and students alike are affected by this process. In order to show how, we explore the following issues: What is Research 2.0? Which digital/online tools have we used to assist our students? What are the challenges for academic research using digital / web 2.0 tools? And how do digital tools shape academic research?

  4. Hope and optimism: latent structures and influences on grade expectancy and academic performance.

    Science.gov (United States)

    Rand, Kevin L

    2009-02-01

    A synthesized model of trait hope (Snyder 1994, 2002) and trait optimism (Scheier & Carver, 1985) is proposed. In this model hope and optimism are conceptualized as facets of an overarching trait called goal attitude. Structural equation modeling is used to test the plausibility of the proposed model in a sample of 345 students in a university psychology course who completed the Adult Hope Scale (Snyder et al., 1991) and the Life Orientation Test-Revised (Scheier, Carver, & Bridges, 1994). The proposed model shows acceptable fit to the observed data. The synthesized model is used to examine the unique and common influences of hope and optimism on grade expectancy and academic performance in 312 students who completed the course. The results show that hope uniquely influenced students' grade expectancies, whereas optimism did not. In turn, grade expectancies influenced academic performance. Neither hope nor optimism had a unique, direct influence on academic performance. In contrast, the shared aspect of hope and optimism (i.e., goal attitude) had a direct influence on academic performance.

  5. Surface analysis of the selective excimer laser patterning of a thin PEDOT:PSS film on flexible polymer films

    Energy Technology Data Exchange (ETDEWEB)

    Schaubroeck, David, E-mail: David.Schaubroeck@elis.ugent.be [Center for Microsystems Technology (CMST), imec and Ghent University, Technologiepark 15, B-9052 Ghent (Belgium); De Smet, Jelle; Willems, Wouter [Center for Microsystems Technology (CMST), imec and Ghent University, Technologiepark 15, B-9052 Ghent (Belgium); Cools, Pieter; De Geyter, Nathalie; Morent, Rino [Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Ghent (Belgium); De Smet, Herbert; Van Steenbeerge, Geert [Center for Microsystems Technology (CMST), imec and Ghent University, Technologiepark 15, B-9052 Ghent (Belgium)

    2016-07-15

    Highlights: • Laser patterning of thin film PEDOT:PSS on polymer foils is characterized in great detail. • PEDOT:PSS does not need to be fully removed to create electrically insulating patterns. • The underlying polymer foil influences the ablation behavior. - Abstract: Fast patterning of highly conductive polymers like PEDOT:PSS (poly (3,4-ethylene dioxythiophene): polystyrene sulfonate) with lasers can contribute to the development of industrial production of liquid crystal displays on polymer foils. In this article, the selective UV laser patterning of a PEDOT:PSS film on flexible polymer films is investigated. Based on their optical properties, three polymer films are investigated: polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) and cellulose triacetate (TAC). Ablation parameters for a 110 nm PEDOT:PSS film on these polymer films are optimized. A detailed study of the crater depth, topography and surface composition are provided using optical profilometry, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The electrical insulation of the lines is measured and correlated to the crater analyses for different laser settings. Finally, potential ablation parameters for each of the polymer films are derived.

  6. Framing design research for service orientation through PSS approaches

    DEFF Research Database (Denmark)

    Sakao, Tomohiko; Sandström, Gunilla Ölundh; Matzen, Detlef

    2009-01-01

    In order to respond to the industrial trend towards service design and delivery, design research must address a vast area partially related to value creation, marketing and network theories. However, compared to the space to be explored, there is little insight available. Thus, this paper......, as a first step, proposes a way to frame such design research. First, an extensive literature review is performed of over 100 articles on not only PSS-design research but also on related research in fields as PSS in general, service design, innovation, and business models in a broad view. Based...... on the literature analysis, the authors present three crucial dimensions for service oriented design research, i.e. an offer dimension representing products and services, a provider dimension, and a customer/user dimension. In addition, three research targets are proposed; PSS-offer modelling, PSS development...

  7. Trait emotional intelligence influences on academic achievement and school behaviour.

    Science.gov (United States)

    Mavroveli, Stella; Sánchez-Ruiz, María José

    2011-03-01

    BACKGROUND. Trait emotional intelligence (trait EI or trait emotional self-efficacy) refers to individuals' emotion-related self-perceptions (Petrides, Furnham, & Mavroveli, 2007). The children's trait EI sampling domain provides comprehensive coverage of their affective personality. Preliminary evidence shows that the construct has important implications for children's psychological and behavioural adjustment. AIMS. This study investigates the associations between trait EI and school outcomes, such as performance in reading, writing, and maths, peer-rated behaviour and social competence, and self-reported bullying behaviours in a sample of primary school children. It also examines whether trait EI scores differentiate between children with and without special educational needs (SEN). SAMPLE. The sample comprised 565 children (274 boys and 286 girls) between the ages of 7 and 12 (M((age)) = 9.12 years, SD= 1.27 years) attending three English state primary schools. METHOD. Pupils completed the Trait Emotional Intelligence Questionnaire-Child Form (TEIQue-CF), the Guess Who peer assessment, the Peer-Victimization Scale, and the Bullying Behaviour Scale. Additional data on achievement and SEN were collected from the school archives. RESULTS. As predicted by trait EI theory, associations between trait EI and academic achievement were modest and limited to Year 3 children. Higher trait EI scores were related to more nominations from peers for prosocial behaviours and fewer nominations for antisocial behaviour as well as lower scores on self-reported bulling behaviours. Furthermore, SEN students scored lower on trait EI compared to students without SEN. CONCLUSIONS. Trait EI holds important and multifaceted implications for the socialization of primary schoolchildren. ©2010 The British Psychological Society.

  8. Unveiling Research Agendas: a study of the influences on research problem selection among academic researchers

    Energy Technology Data Exchange (ETDEWEB)

    Bianco, M.; Sutz, J.

    2016-07-01

    Research problem selection is central to the dynamics of scientific knowledge production. Research agendas result from the selection of research problems and the formulation of individual and/or collective academic strategies to address them. But, why researchers study what they study? This paper presents incipient research focused on the way different factors influence the construction of academic research agendas. It takes a researcher-oriented approach relying on opinions and perspectives of a wide range of researchers in all fields of knowledge. The empirical work is carried out in Uruguay, a country in the periphery of mainstream science, whose academic community struggles in search of a balance between the requirements of the world community of scholars and the demands from different national stakeholders. The methodology and research results from this study may be relevant to other countries, at different peripheries. Further, understanding the interplay of influences that shape research agendas is an important tool for policy analysis and planning everywhere. (Author)

  9. Autoclave Sterilization of PEDOT:PSS Electrophysiology Devices.

    Science.gov (United States)

    Uguz, Ilke; Ganji, Mehran; Hama, Adel; Tanaka, Atsunori; Inal, Sahika; Youssef, Ahmed; Owens, Roisin M; Quilichini, Pascale P; Ghestem, Antoine; Bernard, Christophe; Dayeh, Shadi A; Malliaras, George G

    2016-12-01

    Autoclaving, the most widely available sterilization method, is applied to poly(3,4-ethylenedioxythiophene) doped with polystyrene sulfonate (PEDOT:PSS) electrophysiology devices. The process does not harm morphology or electrical properties, while it effectively kills E. coli intentionally cultured on the devices. This finding paves the way to widespread introduction of PEDOT:PSS electrophysiology devices to the clinic. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  10. The Influence of E-Learning on the Academic Performance of ...

    African Journals Online (AJOL)

    The aim of this study is then to evaluate the influence of e learning on the academic performance of year II mathematics students in Jimma University, in basic algebra course (fundamental concept of algebra). This study was a Quasi Experimental design whereby students were categorized into three performance levels ...

  11. Influence of Perceived Contextual Stress on Self-Esteem and Academic Outcomes in African American Adolescents.

    Science.gov (United States)

    Cunningham, Michael; Hurley, Megan; Foney, Dana; Hayes, DeMarquis

    2002-01-01

    Studied factors that influence academic success among 84 high-achieving African American students exposed to many stressful life events often associated with life in urban neighborhoods. Results show that adolescent-perceived hassles were indications of parental monitoring, and parental monitoring was positively related to self-esteem. Discusses…

  12. How Do Supports from Parents, Teachers, and Peers Influence Academic Achievement of Twice-Exceptional Students

    Science.gov (United States)

    Wang, Clare Wen; Neihart, Maureen

    2015-01-01

    This study investigated how perceived external factors such as supports from parents and teachers, and influences from peers contributed to the academic successes and failures of Singaporean twice-exceptional (2e) students. A total of six 2e participants from one secondary school in Singapore voluntarily participated in the study. This study used…

  13. How Students' Beliefs about Their Intelligence Influence Their Academic Performance. Information Capsule. Volume 1012

    Science.gov (United States)

    Blazer, Christie

    2011-01-01

    Students' academic success may be influenced not only by their actual ability, but also by their beliefs about their intelligence. Studies have found that students enter a classroom with one of two distinct conceptions of their intellectual ability: some students believe their intelligence is expandable (growth mindset), while others believe their…

  14. Initial Teacher Education: Does Self-Efficacy Influence Candidate Teacher Academic Achievement and Future Career Performance?

    Science.gov (United States)

    Shawer, Saad F.

    2013-01-01

    This quantitative investigation examined the influence of low and high self-efficacy on candidate teacher academic performance in a foreign language teaching methodology course through testing the speculation that high self-efficacy levels would improve pedagogical-content knowledge (PCK). Positivism guided the research design at the levels of…

  15. A Phenomenological Study: The Influence of Noncognitive Factors on Academically Unprepared College Students

    Science.gov (United States)

    Thom, Danny Moire

    2012-01-01

    This phenomenological research explored the influence of noncognitive factors in four areas: early educational factors, personal factors, affective factors, and noncognitive skill factors to understand the phenomenon of college students' academic underpreparedness. Findings related to textual categories indicated personal factors such as a…

  16. The Influence of Rankings and Incentive Systems on Academic Publishing in South African Universities

    Science.gov (United States)

    Soudien, Crain

    2014-01-01

    This essay looks at the influence of ranking and incentive systems on decisions higher education institutions are making with respect to research and academic publishing. It describes and analyses how institutions within the South African higher education system have navigated their way through the contradictory forces confronting them.…

  17. A Quantitative Evaluation of Gender, Nationality, and Generational/Age Influence on Academic Motivation

    Science.gov (United States)

    Rush, Karen

    2013-01-01

    Universities are challenged with finding ways to motivate the increasing number of diverse students so that the largest number of students can be expected to succeed. University success is measured by retention and graduation rates, which affect profit. A lack of academic motivation among increasingly diverse students influences student retention,…

  18. Parental Influence on Academic Achievement among the Primary School Students in Trinidad

    Science.gov (United States)

    Johnson, Emmanuel Janagan; Descartes, Christine H.

    2017-01-01

    The present study examined the level of parental influence on academic achievement in primary school students who prepare for the National-level test at standard five (grade 6), Secondary Entrance Examinations in Trinidad. A sample of 128 students studying standard five from primary schools was randomly selected. The data were analysed using SPSS.…

  19. Influence of Parenting Styles on the Adolescent Students' Academic Achievement in Kenyan Day Secondary Schools

    Science.gov (United States)

    Odongo, Alice Atieno; Aloka, Peter J. O.; Raburu, Pamela

    2016-01-01

    The present study sought to establish the influence of parenting styles on adolescent academic achievement in day secondary schools in North Rachuonyo Sub-County, Kenya. Baumrind's theory of parenting style informed the study. The Concurrent Triangulation Design was used. The target population comprised 2409 day secondary students registered for…

  20. Early Adolescent Friendships and Academic Adjustment: Examining Selection and Influence Processes with Longitudinal Social Network Analysis

    Science.gov (United States)

    Shin, Huiyoung; Ryan, Allison M.

    2014-01-01

    This study investigated early adolescent friendship selection and social influence with regard to academic motivation (self-efficacy and intrinsic value), engagement (effortful and disruptive behavior), and achievement (GPA calculated from report card grades) among 6th graders (N = 587, 50% girls at Wave 1; N = 576, 52% girls at Wave 2) followed…

  1. South Korean Male Adolescents' Internal and External Influences in Academic Achievement

    Science.gov (United States)

    Geesa, Rachel Louise

    2014-01-01

    South Korean adolescents' motivation for high academic achievement is strongly influenced by extraordinary parental support, pressures to achieve, and the practice of utilizing both public and private learning environments in South Korea. To remain competitive, educational leaders may benefit from observations of other countries' academic…

  2. Direct and indirect influences of school learning on Hispanic-American eighth grade students' academic achievement

    OpenAIRE

    Hernández-Gantes, Victor M.

    1993-01-01

    The purpose of this study was to determine the extent of the direct and indirect influence of previous grades, quality of instruction, motivation, quantity of instruction, and homework on Hispanic-American eighth grade students' academic achievement, while controlling for important background variables (family background, student's English proficiency, and gender). Few researchers have examined both direct and indirect effects of school learning variables and background influences simultaneou...

  3. Sustaining the edge: factors influencing strategy selection in academic health centers.

    Science.gov (United States)

    Walsh, Anne M; Szabat, Kathryn

    2002-01-01

    Competition within the acute care sector as well as increased penetration by managed care organizations has influenced the structure and role of academic health centers during the past decade. The market factors confronting academic health centers are not dissimilar from conditions that confront other organizations competing in mature industries characterized by declining profitability and intense rivalry for market share. When confronted with intense competition or adverse external events, organizations in other industries have responded to potential threats by forming alliances, developing joint ventures, or merging with another firm to maintain their competitive advantage. Although mergers and acquisitions dominated the strategic landscape in the healthcare industry during the past decade, recent evidence suggests that other types of strategic ventures may offer similar economic and contracting benefits to member organizations. Academic health centers have traditionally been involved in network relationships with multiple partners via their shared technology, collaborative research, and joint educational endeavors. These quasi-organizational relationships appear to have provided a framework for strategic decisions and allowed executives of academic health centers to select strategies that were competitive yet closely aligned with their organizational mission. The analysis of factors that influenced strategy selection by executives of academic health centers suggests a deliberate and methodical approach to achieving market share objectives, expanding managed care contracts, and developing physician networks.

  4. How Is Working Memory Training Likely to Influence Academic Performance? Current Evidence and Methodological Considerations.

    Science.gov (United States)

    Bergman Nutley, Sissela; Söderqvist, Stina

    2017-01-01

    Working memory (WM) is one of our core cognitive functions, allowing us to keep information in mind for shorter periods of time and then work with this information. It is the gateway that information has to pass in order to be processed consciously. A well-functioning WM is therefore crucial for a number of everyday activities including learning and academic performance (Gathercole et al., 2003; Bull et al., 2008), which is the focus of this review. Specifically, we will review the research investigating whether improving WM capacity using Cogmed WM training can lead to improvements on academic performance. Emphasis is given to reviewing the theoretical principles upon which such investigations rely, in particular the complex relation between WM and mathematical and reading abilities during development and how these are likely to be influenced by training. We suggest two possible routes in which training can influence academic performance, one through an effect on learning capacity which would thus be evident with time and education, and one through an immediate effect on performance on reading and mathematical tasks. Based on the theoretical complexity described we highlight some methodological issues that are important to take into consideration when designing and interpreting research on WM training and academic performance, but that are nonetheless often overlooked in the current research literature. Finally, we will provide some suggestions for future research for advancing the understanding of WM training and its potential role in supporting academic attainment.

  5. How Is Working Memory Training Likely to Influence Academic Performance? Current Evidence and Methodological Considerations

    Science.gov (United States)

    Bergman Nutley, Sissela; Söderqvist, Stina

    2017-01-01

    Working memory (WM) is one of our core cognitive functions, allowing us to keep information in mind for shorter periods of time and then work with this information. It is the gateway that information has to pass in order to be processed consciously. A well-functioning WM is therefore crucial for a number of everyday activities including learning and academic performance (Gathercole et al., 2003; Bull et al., 2008), which is the focus of this review. Specifically, we will review the research investigating whether improving WM capacity using Cogmed WM training can lead to improvements on academic performance. Emphasis is given to reviewing the theoretical principles upon which such investigations rely, in particular the complex relation between WM and mathematical and reading abilities during development and how these are likely to be influenced by training. We suggest two possible routes in which training can influence academic performance, one through an effect on learning capacity which would thus be evident with time and education, and one through an immediate effect on performance on reading and mathematical tasks. Based on the theoretical complexity described we highlight some methodological issues that are important to take into consideration when designing and interpreting research on WM training and academic performance, but that are nonetheless often overlooked in the current research literature. Finally, we will provide some suggestions for future research for advancing the understanding of WM training and its potential role in supporting academic attainment. PMID:28223948

  6. The influence of affective variables on the acquisition of academic literacy

    Directory of Open Access Journals (Sweden)

    Olivier, Louise

    2013-12-01

    Full Text Available The teaching of academic literacy at university level, internationally and at universities in South Africa, is quite common. Despite a great deal of research on various facets of academic literacy, little research has been done in terms of the influence of attitudes, emotions and motivation as affective variables at the start of an academic literacy module. It is clear that societal and contextual factors have an influence on the emotions, motivation and attitudes of students. This article reports on open-ended questionnaires and a focus group interview conducted with students enrolled in an academic literacy module at the start of the module, as well as an open-ended questionnaire after the completion of the module. The initial phases of the research show students’ negativity towards the module; however, after the completion of the module, students realise the value thereof. It is clear that within the context of the research populations in this study, more transparency is needed regarding the academic literacy test written prior to the start of the module, and students need to be better informed about the module so as not to only rely on peers’ perceptions of the module. Furthermore, modules should be subject-specific rather than generic and relevant to the needs of the students.

  7. Factors potentially influencing academic performance among medical students.

    Science.gov (United States)

    Al Shawwa, Lana; Abulaban, Ahmad A; Abulaban, Abdulrhman A; Merdad, Anas; Baghlaf, Sara; Algethami, Ahmed; Abu-Shanab, Joullanar; Balkhoyor, Abdulrahman

    2015-01-01

    Studies are needed to examine predictors of success in medical school. The aim of this work is to explore factors that potentially influence excellence of medical students. The study was conducted in the Medical Faculty of King Abdulaziz University during October 2012. A self-administered questionnaire was used. Medical students with a grade point average (GPA) ≥4.5 (out of 5) were included and compared to randomly selected medical students with a GPA hours on social networking per day as compared to 42.6% of the lower GPA students (Pstudying time (P=0.013), and 47% revise their material at least once before an exam (P=0.02). Excellent medical students have many different characteristics. For example, they do not use social networking for prolonged periods of time, and they have strong motivation and study enjoyment. Further studies are needed to examine whether these differences have a real impact on GPA or not.

  8. How academic career and habits related to the school environment influence on academic performance in the physical education subject

    Directory of Open Access Journals (Sweden)

    Vizuete Carrizosa, Manuel

    2012-01-01

    Full Text Available The main objective of this study was to analyze the degree of influence of some school habits and scholar trayectory on academic achievement in physical education (PE students in secondary education (ESO in the city of Badajoz. A total sample of 1197 students in compulsory secondary education 49.9% men, and 50.1% women, participated in the study. They spent a questionnaire filled out by the river questions about major school habits, of which eight variables were analyzed also included the final course in the subject of EF as a variable for analysis of academic performance. Through statistical analysis with ANOVA, Mann-Whitney U, and Kruskal Wallis H, there are significant differences in PE scores in all variables analyzed (p d».001, among which being repetitive, being truant, the time to read and study daily. In the variable environment perceived in class, there is a degree of significance (p d».05. Pupils who were repeaters, missing more classes or were delayed more times than read and studied less and earned a worse environment in their classes, are those who obtained poorer performance on EF.

  9. Enhancement of Thermoelectric Properties of PEDOT:PSS and Tellurium-PEDOT:PSS Hybrid Composites by Simple Chemical Treatment

    Science.gov (United States)

    Jin Bae, Eun; Hun Kang, Young; Jang, Kwang-Suk; Yun Cho, Song

    2016-01-01

    The thermoelectric properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and tellurium-PEDOT:PSS (Te-PEDOT:PSS) hybrid composites were enhanced via simple chemical treatment. The performance of thermoelectric materials is determined by their electrical conductivity, thermal conductivity, and Seebeck coefficient. Significant enhancement of the electrical conductivity of PEDOT:PSS and Te-PEDOT:PSS hybrid composites from 787.99 and 11.01 to 4839.92 and 334.68 S cm-1, respectively was achieved by simple chemical treatment with H2SO4. The power factor of the developed materials could be effectively tuned over a very wide range depending on the concentration of the H2SO4 solution used in the chemical treatment. The power factors of the developed thermoelectric materials were optimized to 51.85 and 284 μW m-1 K-2, respectively, which represent an increase of four orders of magnitude relative to the corresponding parameters of the untreated thermoelectric materials. Using the Te-PEDOT:PSS hybrid composites, a flexible thermoelectric generator that could be embedded in textiles was fabricated by a printing process. This thermoelectric array generates a thermoelectric voltage of 2 mV using human body heat.

  10. Factors potentially influencing academic performance among medical students

    Science.gov (United States)

    Al Shawwa, Lana; Abulaban, Ahmad A; Abulaban, Abdulrhman A; Merdad, Anas; Baghlaf, Sara; Algethami, Ahmed; Abu-shanab, Joullanar; Balkhoyor, Abdulrahman

    2015-01-01

    Background Studies are needed to examine predictors of success in medical school. The aim of this work is to explore factors that potentially influence excellence of medical students. Methods The study was conducted in the Medical Faculty of King Abdulaziz University during October 2012. A self-administered questionnaire was used. Medical students with a grade point average (GPA) ≥4.5 (out of 5) were included and compared to randomly selected medical students with a GPA students participated in the study. 50.4% of the sample was students with a GPA ≥4.5. No statistically significant difference regarding the time spent on outings and social events was found. However, 60.7% of high GPA students spend less than 2 hours on social networking per day as compared to 42.6% of the lower GPA students (Pstudents prefer to study alone (P=0.02), 68.0% required silence and no interruptions during studying time (P=0.013), and 47% revise their material at least once before an exam (P=0.02). Conclusion Excellent medical students have many different characteristics. For example, they do not use social networking for prolonged periods of time, and they have strong motivation and study enjoyment. Further studies are needed to examine whether these differences have a real impact on GPA or not. PMID:25674033

  11. Attendance and Parental Support: Its Influence to College Students’ Academic Performance

    Directory of Open Access Journals (Sweden)

    Revina Ortizano- Mendoza

    2016-11-01

    Full Text Available This descriptive-correlational study determined which of the factors - students’ attendance, motivation, school climate, and parents’ support - influence college students’ academic performance. A researcher-made instrument was used to gather the data. This instrument underwent content validation and reliability testing. A total of 109 college students in a higher education institution during the first semester of School Year 2015-2016 were randomly chosen as participants. Descriptive statistics such as frequency, percentage, mean, and standard deviation were employed to determine the level of students’ motivation, perception of school climate and the level of parent’s support. Spearman rho was also used to determine which of the factors had influence to the academic performance of students. Results reveal that the participants had high level of motivation, and perceived the school climate as very satisfactory and had assessed their parental support as low. Moreover, only parental support and students’ attendance significantly influenced academic performance. From the findings of the study, it implies that college students, as individuals, still need the support of parents not just financially, but morally as well, in their academic endeavors. Hence, parents are encouraged to give their support to their children in all forms.

  12. First selection, then influence: Developmental differences in friendship dynamics regarding academic achievement.

    Science.gov (United States)

    Gremmen, Mariola Claudia; Dijkstra, Jan Kornelis; Steglich, Christian; Veenstra, René

    2017-07-01

    This study concerns peer selection and influence dynamics in early adolescents' friendships regarding academic achievement. Using longitudinal social network analysis (RSiena), both selection and influence processes were investigated for students' average grades and their cluster-specific grades (i.e., language, exact, and social cluster). Data were derived from the SNARE (Social Network Analysis of Risk behavior in Early adolescence) study, using 6 waves (N = 601; Mage = 12.66, 48.9% boys at first wave). Results showed developmental differences between the first and second year of secondary school (seventh and eighth grade). Whereas selection processes were found in the first year on students' cluster-specific grades, influence processes were found in the second year, on both students' average and cluster-specific grades. These results suggest that students initially tend to select friends on the basis of similar cluster-based grades (first year), showing that similarity in achievement is attractive for friendships. Especially for low-achieving students, similar-achieving students were highly attractive as friends, whereas they were mostly avoided by high-achieving students. Influence processes on academic achievement take place later on (second year), when students know each other better, indicating that students' grades become more similar over time in response to their connectedness. Concluding, this study shows the importance of developmental differences and specific school subjects for understanding peer selection and influence processes in adolescents' academic achievement. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

  13. Decohesion Kinetics of PEDOT:PSS Conducting Polymer Films

    KAUST Repository

    Dupont, Stephanie R.

    2013-10-17

    The highly conductive polymer PEDOT:PSS is a widely used hole transport layer and transparent electrode in organic electronic devices. To date, the mechanical and fracture properties of this conductive polymer layer are not well understood. Notably, the decohesion rate of the PEDOT:PSS layer and its sensitivity to moist environments has not been reported, which is central in determining the lifetimes of organic electronic devices. Here, it is demonstrated that the decohesion rate is highly sensitive to the ambient moisture content, temperature, and mechanical stress. The kinetic mechanisms are elucidated using atomistic bond rupture models and the decohesion process is shown to be facilitated by a chemical reaction between water molecules from the environment and strained hydrogen bonds. Hydrogen bonds are the predominant bonding mechanism between individual PEDOT:PSS grains within the layer and cause a significant loss in cohesion when they are broken. Understanding the decohesion kinetics and mechanisms in these films is essential for the mechanical integrity of devices containing PEDOT:PSS layers and yields general guidelines for the design of more reliable organic electronic devices. Decohesion rate in PEDOT:PSS conducting films is studied under varied environmental conditions. The moisture content in the environment is the most important factor accelerating the decohesion in the PEDOT:PSS layer, which is detrimental for device reliability. The findings on the decohesion rate and mechanisms, elucidated by atomic kinetic models, are essential for the design of more reliable organic electronic devices containting PEDOT:PSS layers. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Factors potentially influencing academic performance among medical students

    Directory of Open Access Journals (Sweden)

    Al Shawwa L

    2015-01-01

    Full Text Available Lana Al Shawwa,1 Ahmad A Abulaban,2 Abdulrhman A Abulaban,3 Anas Merdad,3 Sara Baghlaf,3 Ahmed Algethami,3 Joullanar Abu-shanab,3 Abdulrahman Balkhoyor3 1Department of Medical Education, College of Medicine, King Abdulaziz University, Jeddah, 2Department of Medicine-Neurology, King Fahad National Guard Hospital, King Abdulziz Medical City, Riyadh, 3Department of Medical Education, College of Medicine, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia Background: Studies are needed to examine predictors of success in medical school. The aim of this work is to explore factors that potentially influence excellence of medical students. Methods: The study was conducted in the Medical Faculty of King Abdulaziz University during October 2012. A self-administered questionnaire was used. Medical students with a grade point average (GPA ≥4.5 (out of 5 were included and compared to randomly selected medical students with a GPA <4.5, who were available at the time of the study. Results: A total of 359 undergraduate students participated in the study. 50.4% of the sample was students with a GPA ≥4.5. No statistically significant difference regarding the time spent on outings and social events was found. However, 60.7% of high GPA students spend less than 2 hours on social networking per day as compared to 42.6% of the lower GPA students (P<0.01. In addition, 79% of high GPA students prefer to study alone (P=0.02, 68.0% required silence and no interruptions during studying time (P=0.013, and 47% revise their material at least once before an exam (P=0.02. Conclusion: Excellent medical students have many different characteristics. For example, they do not use social networking for prolonged periods of time, and they have strong motivation and study enjoyment. Further studies are needed to examine whether these differences have a real impact on GPA or not. Keyword: King Abdulaziz University KAU, medical school, study habits, exam habits 

  15. Towards assessing Product/Service-Systems (PSS) within the Danish maritime industry: A PSS positioning map

    DEFF Research Database (Denmark)

    Hsuan, Juliana; Andersen, Jakob Axel Bejbro; Bey, Niki

    2012-01-01

    their position in terms of the balance between product-related and service-related activities. Judging from a workshop carried out with companies from the maritime industry and researchers in the area, the approach seems promising, but requires improvements on questionnaire and Matrix. These need to incorporate...... further improvements regarding the factor of time and the applicability related to product/service portfolios, as opposed to single product/services. The authors already plan further research on the identified issues.......In response to requirements resulting from a changing business landscape from solely physical-product-based value creation towards performance-based value creation, this paper presents a questionnaire-based matrix, the PSS Categorization Matrix, that is developed in order to help organizations find...

  16. Silver Nanoparticles in PEDOT:PSS Layer for Polymer Solar Cell Application

    Directory of Open Access Journals (Sweden)

    Agnieszka Iwan

    2015-01-01

    Full Text Available We compare the performance of polymer solar cells based on poly(3-hexylthiophene (P3HT and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM with silver nanoparticles (Ag NPs incorporated in poly(3,4-ethylenedioxythiophene:poly(styrenesulfonate (PEDOT:PSS. The structure of constructed solar devices was ITO/PEDOT:PSS:Ag NPs/P3HT:PCBM/Al. Typical polyol chemistry was used to synthesize silver in water solution. Ag nanoparticles were investigated by UV-vis, atomic force microscopy (AFM, and dynamic light scattering (DLS methods. We investigated influence of amount of silver in a hole transporting layer on the performance of bulk heterojunction polymer solar cells. The value of power conversion efficiency (PCE, equal to 2.16% under simulated 100 mW/cm2 AM 1.5G irradiation, was found for device created in air with 60 µL of Ag NPs added to 1 mL of PEDOT:PSS. Along with the increase amount of Ag NPs from 60 to 150 µL, the PCE decrease was found. Stability of solar cells with Ag was also investigated. The loss in value of PCE after 8 months was found in the range 13–47% depending on the device architecture. The solar cells were additionally measured with impedance spectroscopy.

  17. Gender-specific influence of health behaviors on academic performance in Spanish adolescents: the AFINOS study.

    Science.gov (United States)

    Martínez-Gómez, D; Veiga, O L; Gómez-Martínez, S; Zapatera, B; Martínez-Hernández, D; Calle, Ma E; Marcos, A

    2012-01-01

    New paradigms based on the multifactorial etiology of chronic diseases and behavioral outcomes suggest that a combination of health behaviors may have more impact on the outcome of interest than any single factor. To examine the independent and combined influence of four health behaviors on school performance in Spanish adolescents. A total of 1825 Spanish adolescents reported their grades in Language and Literature (LL) and Math. Body mass index, family structure and school-related factors (attitude to school, need to repeat > 1-yr and absenteeism) were self-reported. Adolescents were dichotomized as healthy or unhealthy based on meeting or not meeting lifestyle recommendations on physical activity, TV viewing, sleep and fruit intake. Each adolescent was also scored according to the number of healthy recommendations fulfilled. In boys, there were no associations between health behaviors and academic performance. Good academic performance in girls was associated with physical activity (P academic performance in adolescent girls.

  18. The influence of gender on personality variables conditioning learning: Emotional intelligence and academic procrastination

    Directory of Open Access Journals (Sweden)

    Mercè Clariana,

    2011-10-01

    Full Text Available This research analyses the relationship between academic procrastination and emotional intelligence taking also into account the gender and age influence. Psychology undergraduates from the UAB (Universitat Autónoma de Barcelona, Spain and the UIB (Universitat de les Illes Balears, Spain, 45 males and 147 females constituted the sample of the study. Academic procrastination was assessed by means of the D scale (CLARIANA & MARTÍN, 2008 and emotional intelligence by means of the EQ–i (BAR–ON, 1997. The results show that academic procrastination has a significant negative relationship with intrapersonal intelligence, emotional quotient and mood. Moreover, female students scored significantly higher than males both in intrapersonal and interpersonal Intelligence while males obtained higher scores in both stress management and adaptability.

  19. Energy level and thickness control on PEDOT:PSS layer for efficient planar heterojunction perovskite cells

    Science.gov (United States)

    Wang, Chunhua; Zhang, Chujun; Tong, Sichao; Xia, Huayan; Wang, Lijuan; Xie, Haipeng; Gao, Yongli; Yang, Junliang

    2018-01-01

    Efficient planar heterojunction perovskite solar cells (PHJ-PSCs) with an architecture of ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/Al were fabricated by controlling the energy level and thickness of the PEDOT:PSS layer, where the PEDOT:PSS precursor was diluted with deionized water (H2O) and isopropyl alcohol (IPA), i.e. W-PEDOT:PSS and I-PEDOT:PSS. The performance parameters of the PHJ-PSCs showed soaring enhancement after employing W-PEDOT:PSS or I-PEDOT:PSS instead of pristine PEDOT:PSS (P-PEDOT:PSS), resulting in an increase of the power conversion efficiency (PCE) of W-PEDOT:PSS-based PHJ-PSCs to 15.60% from 11.95% for P-PEDOT:PSS-based PHJ-PSCs. The performance improvement results from two aspects. On the one hand, as compared to P-PEDOT:PSS, the occupied molecular orbital energy (HOMO) level of dilute PEDOT:PSS showed an impressive decrease and can well match the valence band of CH3NH3PbI3 film, resulting in less energy loss and a significant improvement in the open-circuit voltage (V oc). On the other hand, the dilute PEDOT:PSS could produce a thinner film as compared with the P-PEDOT:PSS, which also played an important role in the performance of the PHJ-PSCs. Furthermore, the electrochemical impedance spectroscopy (EIS) results indicated that the interface between perovskite and PEDOT:PSS was greatly improved by employing W-PEDOT:PSS or I-PEDOT:PSS, leading to an obvious decrease in the series resistance (R s) and an increase in the recombination resistance (R rec). The research demonstrated that diluting PEDOT:PSS with a common solvent, such as H2O and IPA, is a feasible low-temperature way of achieving efficient PHJ-PSCs.

  20. Does Self-Citation Influence Quantitative Measures of Research Productivity Among Academic Oral and Maxillofacial Surgeons?

    Science.gov (United States)

    Susarla, Srinivas M; Swanson, Edward W; Lopez, Joseph; Peacock, Zachary S; Dodson, Thomas B

    2015-10-01

    Quantitative measures of research productivity depend on the citation frequency of a publication. Citation-based metrics, such as the h-index (total number of publications h that have at least h citations), can be susceptible to self-citation, resulting in an inflated measure of research productivity. The purpose of the present study was to estimate the effect of self-citation on the h-index among academic oral and maxillofacial surgeons (OMSs). The present study was a cross-sectional study of full-time academic OMSs in the United States. The predictor variable was the frequency of self-citation. The primary outcome of interest was the h-index. Other study variables included demographic factors and citation metrics. Descriptive, bivariate, and regression statistics were computed. The study sample consisted of 325 full-time academic OMSs. Most surgeons were men (88.3%); approximately 40% had medical degrees. The study subjects had an average of 23.5 ± 37.1 publications. The mean number of self-citations was 15 + 56. The sample's mean h-index was 6.6 ± 7.6 and was associated with self-citation (r = 0.71, P citations. After adjusting for PhD degree, total number of publications, and academic rank, an increasing self-citation rate influenced the h-index (r = 0.006, P citations were more likely to have their h-index influenced by self-citation. Self-citation among full-time academic OMSs does not substantially affect the h-index. Surgeons in the top quartile of self-citation rates are more likely to influence their h-index. Copyright © 2015 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

  1. The influence of academic discourses on medical students' identification with the discipline of family medicine.

    Science.gov (United States)

    Rodríguez, Charo; López-Roig, Sofía; Pawlikowska, Teresa; Schweyer, François-Xavier; Bélanger, Emmanuelle; Pastor-Mira, Maria Angeles; Hugé, Sandrine; Spencer, Sarah; Lévasseur, Gwenola; Whitehead, Ian; Tellier, Pierre-Paul

    2015-05-01

    To understand the influence of academic discourses about family medicine on medical students' professional identity construction during undergraduate training. The authors used a multiple case study research design involving international medical schools, one each from Canada, France, Spain, and the United Kingdom (UK). The authors completed the fieldwork between 2007 and 2009 by conducting 18 focus groups (with 132 students) and 67 semistructured interviews with educators and by gathering pertinent institutional documents. They carried out discursive thematic analyses of the verbatim transcripts and then performed within- and cross-case analyses. The most striking finding was the diverging responses between those at the UK school and those at the other schools. In the UK case, family medicine was recognized as a prestigious academic discipline; students and faculty praised the knowledge and skills of family physicians, and students more often indicated their intent to pursue family medicine. In the other cases, family medicine was not well regarded by students or faculty. This was expressed overtly or through a paradoxical academic discourse that stressed the importance of family medicine to the health care system while decrying its lack of innovative technology and the large workload-to-income ratio. Students at these schools were less likely to consider family medicine. These results stress the influence of academic discourses on medical students' ability to identify with the practice of family medicine. Educators must consider processes of professional identity formation during undergraduate medical training as they develop and reform medical education.

  2. Trait procrastination among dental students in India and its influence on academic performance.

    Science.gov (United States)

    Madhan, Balasubramanian; Kumar, Cholleti Sudheer; Naik, Eslavath Seena; Panda, Sujit; Gayathri, Haritheertham; Barik, Ashish Kumar

    2012-10-01

    Trait procrastination is believed to be highly prevalent among college students and detrimental to their educational performance. As the scenario among dental students is virtually unknown, this study was conducted to evaluate the prevalence of trait procrastination among dental students and to analyze its influence on their academic performance. A total of 174 fourth-year dental students from three dental colleges in India voluntarily completed the Lay's Procrastination Scale-student version (LPS). The mean percentage marks scored in the subsequent final university examinations were used as a measure of academic performance. The descriptive statistics were computed to evaluate the prevalence of significant procrastination (LPS score ≥60). Mann-Whitney U test and multiple linear regressions were used to assess the influence of age and gender on procrastination severity, and the latter was again used to analyze the association between procrastination severity and academic performance. The results indicated that 27 percent (n=47) of the students exhibited a significant extent of trait procrastination; neither age nor gender affected its severity (pProcrastination had a significant and negative impact on the academic performance of the student (beta=-0.150, p=0.039). These findings highlight the need for active measures to reduce the causes and consequences of procrastination in dental education.

  3. Influence of parenting style on the academic performance of middle school students

    Directory of Open Access Journals (Sweden)

    María José Domínguez

    2014-06-01

    Full Text Available Students who don't succeed in school are a persistent problem in our educational system. This fact shows that all the efforts to reduce this problem are not succeeding. One third of our students are left behind by the educational system; their results are discouraging. The measures to fight the academic failure are not working and that we have to put into practice new ways of analysis and treatment of this problem. This research explores the relationship between the way children perceive the parenting style of their parents and his o her own academic performance. In the intersection of both phenomena we find our hypothesis: the way parents socialise their children influences significantly on their academic performance. This research is orientated to decision taking process: the aim is to define the level of influence of the parenting style on academic outcomes. The main result is that parents acceptation/implication appears to be significantly linked to the school performance (this evidence shows a big area for new researches: the family. Our research confirms and frames the correlation between these two variables and underlies the family as a new scenario of pedagogical concern to explain and treat school failure.

  4. Attendance and Parental Support: Its Influence to College Students’ Academic Performance

    OpenAIRE

    Revina Ortizano- Mendoza

    2016-01-01

    This descriptive-correlational study determined which of the factors - students’ attendance, motivation, school climate, and parents’ support - influence college students’ academic performance. A researcher-made instrument was used to gather the data. This instrument underwent content validation and reliability testing. A total of 109 college students in a higher education institution during the first semester of School Year 2015-2016 were randomly chosen as participants. Descript...

  5. Expectations of Achievement and Perceptions of Talent: Child and Parent Influence on Academic Attainment

    OpenAIRE

    Higgins, Abigail

    2010-01-01

    Aims: The influences of parental expectations, self-expectations and academic achievement on eventual educational attainment were investigated in a longitudinal study utilising twin pairs from the Minnesota Twin Family Study (MTFS). Expectations and current school performance were recorded by twins and their parents at twins’ age 11, 14 and 17. Level of education attained by age 24 was used as the key outcome variable. Parents also rated their self-perceived talents at the intake assessment. ...

  6. Longitudinal influence of alcohol and marijuana use on academic performance in college students

    OpenAIRE

    Meda, Shashwath A.; Gueorguieva, Ralitza V.; Pittman, Brian; Rosen, Rivkah R.; Aslanzadeh, Farah; Tennen, Howard; Leen, Samantha; Hawkins, Keith; Raskin, Sarah; Wood, Rebecca M; Austad, Carol S.; Dager, Alecia; Fallahi, Carolyn; Godfrey D. Pearlson

    2017-01-01

    Background Alcohol and marijuana are the two most abused substances in US colleges. However, research on the combined influence (cross sectional or longitudinal) of these substances on academic performance is currently scant. Methods Data were derived from the longitudinal 2-year Brain and Alcohol Research in College Students (BARCS) study including 1142 freshman students who completed monthly marijuana use and alcohol consumption surveys. Subjects were classified into data-driven groups base...

  7. Family influences and academic success: the perceptions of individuals using AAC.

    Science.gov (United States)

    Rackensperger, Tracy

    2012-06-01

    Positive family influences have a significant impact on addressing school barriers to academic success for students from socially disadvantaged backgrounds. Due to inequities and attitudes toward people with complex communication needs, positive family influences may be critical in the academic success of students using AAC. This study asked the following question of eight United States high school graduates who have used augmentative and alternative communication (AAC): How do family influences positively affect the ability of students who use AAC to succeed in the secondary academic environment? Five themes emerged from the qualitative analysis of participants' narratives: (a) the impact of the family in seeking appropriate education, (b) homework as a challenge that was made easier through the involvement of the family, (c) the role of the family in communicating the importance of education, (d) mothers as driving forces of support, and (e) family encouragement for self-determination. This research allows families and schools to recognize the needs of students and to take action to meet them. It identifies the needs of families and schools in establishing relationships with each other, in terms of supporting requirements for accommodation, learning, motivation, and self-determination of students with complex commmunication needs.

  8. Connections, Productivity and Funding: An Examination of Factors Influencing Scientists' Perspectives on the Market Orientation of Academic Research

    Science.gov (United States)

    Ronning, Emily Anne

    2012-01-01

    This study examines scientists' perceptions of the environment in which they do their work. Specifically, this study examines how academic and professional factors such as research productivity, funding levels for science, connections to industry, type of academic appointment, and funding sources influence scientists' perceptions of the…

  9. An Analysis of Factors Influencing Students' Academic Performance in Public and Private Secondary Schools in Rivers State-Nigeria

    Science.gov (United States)

    Kalagbor, Levi Doe

    2016-01-01

    The study examined factors that positively influence students' academic performance in public and private secondary schools in Rivers State-Nigeria. One research question addressed the objectives and problem of the study. The instrument used for the collection of data was the "Students' Academic Performance Questionnaire" (SAPQ),…

  10. Layered composites of PEDOT/PSS/nanoparticles and PEDOT/PSS/phthalocyanines as electron mediators for sensors and biosensors

    Directory of Open Access Journals (Sweden)

    Celia García-Hernández

    2016-12-01

    Full Text Available The sensing properties of electrodes chemically modified with PEDOT/PSS towards catechol and hydroquinone sensing have been successfully improved by combining layers of PEDOT/PSS with layers of a secondary electrocatalytic material such as gold nanoparticles (PEDOT/PSS/AuNPs, copper phthalocyanine (PEDOT/PSS/CuPc or lutetium bisphthalocyanine (PEDOT/PSS/LuPc2. Layered composites exhibit synergistic effects that strongly enhance the electrocatalytic activity as indicated by the increase in intensity and the shift of the redox peaks to lower potentials. A remarkable improvement has been achieved using PEDOT/PSS/LuPc2, which exhibits excellent electrocatalytic activity towards the oxidation of catechol. The kinetic studies demonstrated diffusion-controlled processes at the electrode surfaces. The kinetic parameters such as Tafel slopes and charge transfer coefficient (α confirm the improved electrocatalytic activity of the layered electron mediators. The peak currents increased linearly with concentration of catechol and hydroquinone over the range of 1.5 × 10−4 to 4.0 × 10−6 mol·L−1 with a limit of detection on the scale of μmol·L−1. The layered composite hybrid systems were also found to be excellent electron mediators in biosensors containing tyrosinase and laccase, and they combine the recognition and biocatalytic properties of biomolecules with the unique catalytic features of composite materials. The observed increase in the intensity of the responses allowed detection limits of 1 × 10−7 mol·L−1 to be attained.

  11. Reimagining the self at late-career transitions: how identity threat influences academic physicians' retirement considerations.

    Science.gov (United States)

    Onyura, Betty; Bohnen, John; Wasylenki, Don; Jarvis, Anna; Giblon, Barney; Hyland, Robert; Silver, Ivan; Leslie, Karen

    2015-06-01

    There is scant empirical work exploring academic physicians' psychosocial adjustment during late-career transitions or on the factors that influence their retirement decisions. The authors examine these issues through the lens of sociopsychological identity theory, specifically examining how identity threat influences academic physicians' decisions about retirement. Participants were academic physicians at a Canadian medical school and were recruited via e-mail requests for clinical faculty interested in discussing late-career and retirement planning issues. Participants included 15 males and 6 females (N = 21; mean age = 63, standard deviation = 7.54), representing eight specialties (clinical and surgical). Data were collected in October and November 2012 via facilitated focus groups, which were digitally recorded, transcribed verbatim, and anonymized, then analyzed using thematic analysis. Four primary themes were identified: centrality of occupational identity, experiences of identity threat, experiences of aging in an indifferent system, and coping with late-career transitions. Identity threats were manifested in apprehensions about self-esteem after retirement, practice continuity, and clinical competence, as well as in a loss of meaning and belonging. These identity challenges influenced decisions on whether to retire. Organizational and system support was perceived as wanting. Coping strategies included reimagining and revaluing various aspects of the self through assimilating new activities and reprioritizing others. Identity-related struggles are a significant feature of academic physicians' considerations about late-career transitions. Understanding these challenges, their antecedents, and their consequences can prepare faculty, and their institutions, to better manage late-career transitions. Individual- and institution-level implications are discussed.

  12. Academic Stress Influences Periodontal Health Condition and Interleukin-1 beta Level

    Directory of Open Access Journals (Sweden)

    Sandra O. Kuswandani

    2014-10-01

    Full Text Available Stress is a risk factor for periodontal disease, causing increase levels of interleukin-1 beta that involve in periodontal destruction. Objective: To analyze the relationship between academic stress in residency program students conditions and levels of interleukin-1 beta in gingival crevicular fluid. Methods: Thirty eight subjects filled the questionnaire of Graduate Dental Environtmental Stress (GDES, periodontal examination and samples of gingival crevicular fluid were tested for interleukin-1 beta with the Enzyme-linked Immunosorbent Assay (ELISA test. Results: There were significant differences between academic stress to periodontal tissue in oral hygiene (p=0.038, bleeding on probing index (p=0.02, but no significant differences in pocket depth and loss of attachment (p=0.972. There were significant differences between academic stress to levels of interleukin-1 beta (p=0.03, but no significant differences between levels of interleukin-1 beta to periodontal tissue in oral hygiene (p=0.465, bleeding on probing index (p=0.826, pocket depth (p=0.968, and loss of attachment (p=0.968. Conclusion: Academic stress influences the periodontal risk factor and level of interleukin-1 beta.

  13. Factors influencing nursing students' academic and clinical performance and attrition: an integrative literature review.

    Science.gov (United States)

    Pitt, Victoria; Powis, David; Levett-Jones, Tracy; Hunter, Sharyn

    2012-11-01

    Predicted workforce shortages have resulted in government initiatives to increase student numbers in preregistration nursing education. In tandem schools of nursing need to ensure students' progress and complete. The aim of this review was to identify factors that influence preregistration nursing students' academic performance, clinical performance and attrition. An integrative review of both quantitative and qualitative literature was conducted using validated appraisal checklists. The review included studies published from 1999 to 2011 in the databases: MEDLINE, CINAHL, Proquest nursing, Proquest Education (via Proquest 5000), ERIC, Journals@Ovid, PsychINFO and ScienceDirect. Studies were categorised according to their impact on academic progression, clinical progression and attrition. Forty four studies were found; most used quantitative methodologies. The review identified that few studies explored factors that impact on students' clinical performance. The four categories that potentially impact on nursing students' academic performance and attrition were: demographic, academic, cognitive and personality/behavioural factors. The challenge for universities committed to students' success is to develop strategies aimed at addressing these factors that are appropriate to specific contexts and student cohorts. Copyright © 2012 Elsevier Ltd. All rights reserved.

  14. Peer Influence on Academic Performance: A Social Network Analysis of Social-Emotional Intervention Effects.

    Science.gov (United States)

    DeLay, Dawn; Zhang, Linlin; Hanish, Laura D; Miller, Cindy F; Fabes, Richard A; Martin, Carol Lynn; Kochel, Karen P; Updegraff, Kimberly A

    2016-11-01

    Longitudinal social network analysis (SNA) was used to examine how a social-emotional learning (SEL) intervention may be associated with peer socialization on academic performance. Fifth graders (N = 631; 48 % girls; 9 to 12 years) were recruited from six elementary schools. Intervention classrooms (14) received a relationship building intervention (RBI) and control classrooms (8) received elementary school as usual. At pre- and post-test, students nominated their friends, and teachers completed assessments of students' writing and math performance. The results of longitudinal SNA suggested that the RBI was associated with friend selection and peer influence within the classroom peer network. Friendship choices were significantly more diverse (i.e., less evidence of social segregation as a function of ethnicity and academic ability) in intervention compared to control classrooms, and peer influence on improved writing and math performance was observed in RBI but not control classrooms. The current findings provide initial evidence that SEL interventions may change social processes in a classroom peer network and may break down barriers of social segregation and improve academic performance.

  15. Influence of Academic Self-Regulation, Critical Thinking, and Age on Online Graduate Students' Academic Help-Seeking

    Science.gov (United States)

    Dunn, Karee E.; Rakes, Glenda C.; Rakes, Thomas A.

    2014-01-01

    Academic help-seeking is an invaluable learning strategy that has not yet received much attention in the distance education research literature. The asynchronous nature of distance education and many online courses presents an inherent roadblock to help-seeking. The purpose of this study was to explore the effect of academic self-regulation,…

  16. Academic Achievement as a Moderator of Genetic Influences on Alcohol Use in Adolescence

    Science.gov (United States)

    Benner, Aprile D.; Kretsch, Natalie; Harden, K. Paige; Crosnoe, Robert

    2017-01-01

    Prior research suggests a link between academic performance and alcohol use during adolescence, but the degree to which this association reflects actual protective effects continues to be debated. We investigated the role of genetic factors in the association between academic achievement and adolescent alcohol use and whether achievement might constrain the translation of genetic influences on drinking into actual behavior (a Gene × Environment interaction). Analysis of twin data from Add Health (n = 399 monozygotic and dizygotic twin pairs) revealed not only common genetic factors underlying the association between achievement and alcohol consumption but also evidence for a gene– environment interaction. Specifically, the protective effect of achievement operated by moderating heritability of alcohol use, which was particularly salient for adolescents at high genetic risk for alcohol use. PMID:24294880

  17. Social Consequences of Academic Teaming in Middle School: The Influence of Shared Course-Taking on Peer Victimization

    Science.gov (United States)

    Echols, Leslie

    2014-01-01

    This study examined the influence of academic teaming (i.e., sharing academic classes with the same classmates) on the relationship between social preference and peer victimization among 6th grade students in middle school. Approximately 1,000 participants were drawn from 5 middle schools that varied in their practice of academic teaming. A novel methodology for measuring academic teaming at the individual level was employed, in which students received their own teaming score based on the unique set of classmates with whom they shared academic courses in their class schedule. Using both peer- and self-reports of victimization, the results of two path models indicated that students with low social preference in highly teamed classroom environments were more victimized than low preference students who experienced less teaming throughout the school day. This effect was exaggerated in higher performing classrooms. Implications for the practice of academic teaming were discussed. PMID:25937668

  18. Self-efficacy's influence on student academic achievement in the medical anatomy curriculum.

    Science.gov (United States)

    Burgoon, Jennifer Marie; Meece, Judith L; Granger, Noelle A

    2012-01-01

    Self-efficacy is defined as a person's beliefs in his or her own abilities to successfully complete a task and has been shown to influence student motivation and academic behaviors. More specifically, anatomical self-efficacy is defined as an individual's judgment of his or her ability to successfully complete tasks related to the anatomy curriculum; these include dissecting, learning anatomical concepts, and applying anatomical knowledge to clinical situations. The purpose of this study was to investigate the influence of anatomical self-efficacy on the academic performance of students enrolled in a medical gross anatomy course. To obtain students' anatomical self-efficacy ratings, surveys containing the same anatomical self-efficacy instrument were completed by first-year medical students at a southeastern United States allopathic medical school after each of four gross anatomy assessments. Additional data collected included student demographic information, Medical College Admission Test(®) (MCAT(®)) scores, and anatomy assessment scores, both written examination and laboratory practical. To investigate the potential predictive nature of self-efficacy for academic performance on both the written examination and the laboratory practical components of medical anatomy assessments, hierarchical linear regression analyses were conducted. For these analyses, academic ability (defined as the sum of the physical sciences and biological sciences MCAT scores) was controlled. The results of the hierarchical linear regressions indicated that all four laboratory practical scores were predicted by the corresponding self-efficacy ratings, while two (i.e., thorax/abdomen and pelvis/lower limb) of the four written examination scores were predicted by the corresponding self-efficacy ratings (P ≤ 0.05). Copyright © 2012 American Association of Anatomists.

  19. Systems of career influences: a conceptual model for evaluating the professional development of women in academic medicine.

    Science.gov (United States)

    Magrane, Diane; Helitzer, Deborah; Morahan, Page; Chang, Shine; Gleason, Katharine; Cardinali, Gina; Wu, Chih-Chieh

    2012-12-01

    Surprisingly little research is available to explain the well-documented organizational and societal influences on persistent inequities in advancement of women faculty. The Systems of Career Influences Model is a framework for exploring factors influencing women's progression to advanced academic rank, executive positions, and informal leadership roles in academic medicine. The model situates faculty as agents within a complex adaptive system consisting of a trajectory of career advancement with opportunities for formal professional development programming; a dynamic system of influences of organizational policies, practices, and culture; and a dynamic system of individual choices and decisions. These systems of influence may promote or inhibit career advancement. Within this system, women weigh competing influences to make career advancement decisions, and leaders of academic health centers prioritize limited resources to support the school's mission. The Systems of Career Influences Model proved useful to identify key research questions. We used the model to probe how research in academic career development might be applied to content and methods of formal professional development programs. We generated a series of questions and hypotheses about how professional development programs might influence professional development of health science faculty members. Using the model as a guide, we developed a study using a quantitative and qualitative design. These analyses should provide insight into what works in recruiting and supporting productive men and women faculty in academic medical centers.

  20. The influence of learning styles, enrollment status and gender on academic performance of optometry undergraduates.

    Science.gov (United States)

    Prajapati, Bhavna; Dunne, Mark; Bartlett, Hannah; Cubbidge, Robert

    2011-01-01

    This cross-sectional study was designed to determine whether the academic performance of optometry undergraduates is influenced by enrollment status, learning style or gender. Three hundred and sixty undergraduates in all 3 years of the optometry degree course at Aston University during 2008-2009 were asked for their informed consent to participate in this study. Enrollment status was known from admissions records. An Index of Learning Styles (http://www4.nscu.edu/unity/lockers/users/f/felder/public/Learning-Styles.html) determined learning style preference with respect to four different learning style axes; active-reflective, sensing-intuitive, visual-verbal and sequential-global. The influence of these factors on academic performance was investigated. Two hundred and seventy students agreed to take part (75% of the cohort). 63% of the sample was female. There were 213 home non-graduates (entrants from the UK or European Union without a bachelor's degree or higher), 14 home graduates (entrants from the UK or European Union with a bachelor's degree or higher), 28 international non-graduates (entrants from outside the UK or European Union without a bachelor's degree or higher) and 15 international graduates (entrants from outside the UK or European Union with a bachelor's degree or higher). The majority of students were balanced learners (between 48% and 64% across four learning style axes). Any preferences were towards active, sensing, visual and sequential learning styles. Of the factors investigated in this study, learning styles were influenced by gender; females expressed a disproportionate preference for the reflective and visual learning styles. Academic performance was influenced by enrollment status; international graduates (95% confidence limits: 64-72%) outperformed all other student groups (home non graduates, 60-62%; international non graduates, 55-63%) apart from home graduates (57-69%). Our research has shown that the majority of optometry students

  1. School and Peer Influences on the Academic Outcomes of African American Adolescents

    Science.gov (United States)

    Estrada-Martinez, Lorena; Colin, Rosa J.; Jones, Brittni D.

    2015-01-01

    Little scholarship explores how adolescents’ beliefs about school and peers influence the academic outcomes of African American boys and girls. The sample included 612 African American boys (N=307, Mage=16.84) and girls (N=305, Mage=16.79). Latent class analysis (LCA) revealed unique patterns for African American boys and girls. Findings indicate that for African American boys, school attachment was protective, despite having peers who endorsed negative achievement values. Furthermore, socio-economic (SES) status was associated with higher grade point averages (GPA) for African American girls. Overall, these findings underscore the unique role of school, peer, and gendered experiences in lives of African American adolescents. PMID:26277404

  2. Factors influencing the career and academic choices of lesbian, gay, bisexual, and transgender people.

    Science.gov (United States)

    Schneider, Margaret S; Dimito, Anne

    2010-01-01

    This is an empirical study of academic and career choices for 119 lesbian, gay, bisexual, and transgender (LGBT) students using a questionnaire. Respondents who reported that their sexual orientation influenced their choices a great deal indicated that the influences were both positive and negative. This group was most likely to have experienced anti-LGBT discrimination in the past. In comparing lesbian, bisexual people, and gay males, gay males and respondents from visible minorities were the most likely to feel a negative impact, while bisexual respondents were the least likely. There were too few transgender respondents to include in these statistical comparisons; however, frequencies suggest that transgender people may be the most vulnerable of all. Results suggest that counselors need to take sexual orientation issues, particularly past experiences of discrimination, when working with LGBT clients.

  3. Organizational factors that influence information technology diffusion in academic health sciences centers.

    Science.gov (United States)

    Ash, J

    1997-01-01

    To identify the organizational factors which influence the diffusion of end user online literature searching, the computer-based patient record, and electronic mail systems in academic health sciences centers in the United States. A total of 1335 individuals working in informatics and library areas at 67 academic health sciences centers in the U.S. were surveyed. Multivariate techniques were used to evaluate the relationship between the set of six organizational factors and two measures of innovation diffusion. A Guttman-like scale was developed to measure infusion, or depth or sophistication, of each of the three innovations at each institution. Diffusion was measured by a question previously developed for another study. Six independent variables were measured via five formerly developed scales and one new one. The overall response rate was 41%. The set of organizational variables produced significant results in the diffusion of each of the three innovations, with individual variables influencing diffusion to varying degrees. The same set produced significant results in relation to infusion only for online searching. There was little or no correlation between infusion and diffusion for each innovation. Organizational attributes are important predictors for diffusion of information technology innovations. Individual variables differ in their effect on each innovation. The set of attributes seems less able to predict infusion. It is recommended that both infusion and diffusion be measured in future studies because there is little relation between them. It is further recommended that individuals charged with implementing information technology in the health sciences receive training in managing organizational issues.

  4. Influence of study satisfaction on academic procrastination in psychology students: a preliminary study

    Directory of Open Access Journals (Sweden)

    Sergio Alexis Dominguez-Lara

    2017-06-01

    Full Text Available The aim of this predictive study was to analyze the degree of influence of study satisfaction (SS on academic procrastination (AP. One hundred forty- eight (148 psychology students (111 women between 18 and 32 years old (M = 22.41 were evaluated using the Brief Scale of Study Satisfaction and the Academic Procrastination Scale. After preliminary analyses focused on the scores reliability (α > 0.70 and correlations between dimensions, a regression analysis was performed to determine how much of the variability in the AP dimensions’ scores is explained by the variations in the SS. For that purpose, a method that uses bivariate correlations corrected for attenuation and provides confidence intervals under a bootstrap approach of the associated statistics was applied. All analyses were assessed from an effect size approach. The results indicate that the influence of SS on AP was not significant. These findings provide new ways to implement studies in order to understand the procrastinating behavior in the university setting.

  5. Hole-Transporting Layer Treatment of Planar Hybrid n-Si/PEDOT:PSS Solar Cells with Power Conversion Efficiency up to 14.5%

    Directory of Open Access Journals (Sweden)

    Chenxu Zhang

    2017-01-01

    Full Text Available A systematical investigation was carried out into the effects of the hole-transporting layer treatment of poly(3,4-ethylenedioxythiophene:poly(styrenesulfonate (PEDOT:PSS on the performance of planar hybrid n-Si/PEDOT:PSS solar cells. Triton X-100 and ethylene glycol (EG were chosen to improve the conductivity and surface morphology of the PEDOT:PSS film. It was found that the annealing temperature has a great influence on the PEDOT:PSS material properties and the corresponding device performance. By optimizing the annealing temperature, the conductivity of the PEDOT:PSS film doped with Triton X-100 and EG could be enhanced by a factor of more than three orders. And the corresponding device also shows record power conversion efficiency as high as 14.5% with an open circuit voltage of 0.627 V, a short circuit current of 32.6 mA/cm2, and a fill factor of 70.7%.

  6. Examining Reciprocal Influences Among Family Climate, School Attachment, and Academic Self-Regulation: Implications for School Success

    OpenAIRE

    Xia, Mengya; Fosco, Gregory M.; Feinberg, Mark E.

    2015-01-01

    Guided by family systems and ecological theories, this study examined the multi-contextual implications of family, school, and individual domains for adolescents' school success. The first goal of this study was to examine reciprocal influences among family climate, school attachment, and academic self-regulation (ASR) during the middle school years. The second goal was to test the relative impact of each of these domains on adolescents' school adjustment and academic achievement after the tr...

  7. Factors Influencing Academic Performance Of Standard Eight Girls In National Examinations In Public Primary Schools A Case Of Matungu Division.

    OpenAIRE

    Oparanya Wamukoya Windrick; Kisiangani Benson Walela; Okiiya Andrew Sande

    2015-01-01

    ABSTARCT This study is designed to establish the factors influencing academic of standard eight girls in public primary schools in National exams in Matungu division. The researcher aimed at finding out why there is increased low performance of girls in public schools despite the fact that they are assessed through periodic performance tests do continuous assessment tests CATS midterm carry out tuition and the provision of free primary education which is aimed at improving academic performanc...

  8. An Exploration into the Influence of Academic and Social Values, Procrastination, and Perceived School Belongingness on Academic Performance

    Science.gov (United States)

    Kennedy, Gary J.; Tuckman, Bruce W.

    2013-01-01

    The results of a structural equation model showed that a tendency to procrastinate, assessed early in college students' first term, was positively related to social values, assessed as concerns over social exclusion, but was negatively related to academic task values and grade goal-setting. The results suggest that procrastination may be a…

  9. Longitudinal influence of alcohol and marijuana use on academic performance in college students

    Science.gov (United States)

    Meda, Shashwath A.; Gueorguieva, Ralitza V.; Pittman, Brian; Rosen, Rivkah R.; Aslanzadeh, Farah; Tennen, Howard; Leen, Samantha; Hawkins, Keith; Raskin, Sarah; Wood, Rebecca M.; Austad, Carol S.; Dager, Alecia; Fallahi, Carolyn; Pearlson, Godfrey D.

    2017-01-01

    Background Alcohol and marijuana are the two most abused substances in US colleges. However, research on the combined influence (cross sectional or longitudinal) of these substances on academic performance is currently scant. Methods Data were derived from the longitudinal 2-year Brain and Alcohol Research in College Students (BARCS) study including 1142 freshman students who completed monthly marijuana use and alcohol consumption surveys. Subjects were classified into data-driven groups based on their alcohol and marijuana consumption. A linear mixed-model (LMM) was employed using this grouping factor to predict grade point average (GPA), adjusted for a variety of socio-demographic and clinical factors. Results Three data-driven clusters emerged: 1) No/low users of both, 2) medium-high alcohol/no-low marijuana, and 3) medium-high users of both substances. Individual cluster derivations between consecutive semesters remained stable. No significant interaction between clusters and semester (time) was noted. Post-hoc analysis suggest that at the outset, compared to sober peers, students using moderate to high levels of alcohol and low marijuana demonstrate lower GPAs, but this difference becomes non-significant over time. In contrast, students consuming both substances at moderate-to-high levels score significantly lower at both the outset and across the 2-year investigation period. Our follow-up analysis also indicate that when students curtailed their substance use over time they had significantly higher academic GPA compared to those who remained stable in their substance use patterns over the two year period. Conclusions Overall, our study validates and extends the current literature by providing important implications of concurrent alcohol and marijuana use on academic achievement in college. PMID:28273162

  10. Governance and Academic Culture in Higher Education: Under the Influence of the SSCI Syndrome

    Directory of Open Access Journals (Sweden)

    Chuing Prudence Chou

    2017-10-01

    Full Text Available The trend towards neo-liberal policies which began in the 1980s has caused public finances around the world to be linked to market forces rather than state allocation. In consequence, the sharp reduction in public funding allotted to the education sector has affected both social values and educational quality. With the growing influence of globalization on higher education, many East Asian nations have enacted urgent university reforms designed to boost competitiveness of their domestic university systems. China’s Projects 211 and 985; South Korea’s BK21; Japan’s National University Corporation Plan; and Taiwan’s ‘Five Year- Fifty Billion Plan have all been initiated in response to the process of globalization and the demand for global talent in academia. Elsewhere, governments in the Arab Middle East, the Americas, Europe, East and Southeast Asia have all initiated new policies to enhance the global competitiveness and international visibility of their flagship universities, and many of these focus in an unprecedented away on journal publication as the major performance criterion for faculty reward. The increasing extent to which government policies worldwide favour measurements derived from publication indexes such as SCI/SSCI has led to strengthened managerial governance over academic culture and the academic profession itself. This paper argues that a phenomenon of ‘publish globally and perish locally’ has emerged, especially in the humanities and social sciences which are most vulnerable to ‘SSCI Syndrome’, and that this trend is detrimental to academic effectiveness and diversity.

  11. Longitudinal influence of alcohol and marijuana use on academic performance in college students.

    Directory of Open Access Journals (Sweden)

    Shashwath A Meda

    Full Text Available Alcohol and marijuana are the two most abused substances in US colleges. However, research on the combined influence (cross sectional or longitudinal of these substances on academic performance is currently scant.Data were derived from the longitudinal 2-year Brain and Alcohol Research in College Students (BARCS study including 1142 freshman students who completed monthly marijuana use and alcohol consumption surveys. Subjects were classified into data-driven groups based on their alcohol and marijuana consumption. A linear mixed-model (LMM was employed using this grouping factor to predict grade point average (GPA, adjusted for a variety of socio-demographic and clinical factors.Three data-driven clusters emerged: 1 No/low users of both, 2 medium-high alcohol/no-low marijuana, and 3 medium-high users of both substances. Individual cluster derivations between consecutive semesters remained stable. No significant interaction between clusters and semester (time was noted. Post-hoc analysis suggest that at the outset, compared to sober peers, students using moderate to high levels of alcohol and low marijuana demonstrate lower GPAs, but this difference becomes non-significant over time. In contrast, students consuming both substances at moderate-to-high levels score significantly lower at both the outset and across the 2-year investigation period. Our follow-up analysis also indicate that when students curtailed their substance use over time they had significantly higher academic GPA compared to those who remained stable in their substance use patterns over the two year period.Overall, our study validates and extends the current literature by providing important implications of concurrent alcohol and marijuana use on academic achievement in college.

  12. Longitudinal influence of alcohol and marijuana use on academic performance in college students.

    Science.gov (United States)

    Meda, Shashwath A; Gueorguieva, Ralitza V; Pittman, Brian; Rosen, Rivkah R; Aslanzadeh, Farah; Tennen, Howard; Leen, Samantha; Hawkins, Keith; Raskin, Sarah; Wood, Rebecca M; Austad, Carol S; Dager, Alecia; Fallahi, Carolyn; Pearlson, Godfrey D

    2017-01-01

    Alcohol and marijuana are the two most abused substances in US colleges. However, research on the combined influence (cross sectional or longitudinal) of these substances on academic performance is currently scant. Data were derived from the longitudinal 2-year Brain and Alcohol Research in College Students (BARCS) study including 1142 freshman students who completed monthly marijuana use and alcohol consumption surveys. Subjects were classified into data-driven groups based on their alcohol and marijuana consumption. A linear mixed-model (LMM) was employed using this grouping factor to predict grade point average (GPA), adjusted for a variety of socio-demographic and clinical factors. Three data-driven clusters emerged: 1) No/low users of both, 2) medium-high alcohol/no-low marijuana, and 3) medium-high users of both substances. Individual cluster derivations between consecutive semesters remained stable. No significant interaction between clusters and semester (time) was noted. Post-hoc analysis suggest that at the outset, compared to sober peers, students using moderate to high levels of alcohol and low marijuana demonstrate lower GPAs, but this difference becomes non-significant over time. In contrast, students consuming both substances at moderate-to-high levels score significantly lower at both the outset and across the 2-year investigation period. Our follow-up analysis also indicate that when students curtailed their substance use over time they had significantly higher academic GPA compared to those who remained stable in their substance use patterns over the two year period. Overall, our study validates and extends the current literature by providing important implications of concurrent alcohol and marijuana use on academic achievement in college.

  13. Does learning style influence academic performance in different forms of assessment?

    Science.gov (United States)

    Wilkinson, Tracey; Boohan, Mairead; Stevenson, Michael

    2014-03-01

    Educational research on learning styles has been conducted for some time, initially within the field of psychology. Recent research has widened to include more diverse disciplines, with greater emphasis on application. Although there are numerous instruments available to measure several different dimensions of learning style, it is generally accepted that styles differ, although the qualities of more than one style may be inherent in any one learner. But do these learning styles have a direct effect on student performance in examinations, specifically in different forms of assessment? For this study, hypotheses were formulated suggesting that academic performance is influenced by learning style. Using the Honey and Mumford Learning Style Questionnaire, learning styles of a cohort of first year medical and dental students at Queen's University Belfast were assessed. Pearson correlation was performed between the score for each of the four learning styles and the student examination results in a variety of subject areas (including anatomy) and in different types of assessments - single best answer, short answer questions and Objective Structured Clinical Examinations. In most of the analyses, there was no correlation between learning style and result and in the few cases where the correlations were statistically significant, they generally appeared to be weak. It seems therefore from this study that although the learning styles of students vary, they have little effect on academic performance, including in specific forms of assessment. © 2013 Anatomical Society.

  14. Understanding wider environmental influences on mentoring: Towards an ecological model of mentoring in academic medicine

    Directory of Open Access Journals (Sweden)

    Dario Sambunjak

    2015-05-01

    Full Text Available Mentoring is a complex developmental relationship that contributes to individual growth and career advancement in different areas of human activity, including academic medicine. This article describes a broader environmental milieux in which mentoring occurs and considers the ways in which the environmental factors may affect the process and outcomes of mentoring. An ecological model of mentoring is proposed that takes into account various factors broadly operating at three contextual levels. The first is societal or “macro” level, which implies cultural, economic, and political factors. The second is institutional or “meso” level, consisting of a system-related factors such as field and discipline characteristics, and government policies, and b organization-related factors such as mentoring climate, reward structure, and work design. The third contextual level relates to intrapersonal and interpersonal characteristics of mentor-mentee dyads. If mentoring dyad is viewed as the focal point, societal and institutional levels may be labeled as “external”, and personal level as “internal”. The conceptual diversity and methodological challenges in the study of mentoring need to be acknowledged, but should not be an excuse to leave the external contextual elements out of the researchers’ horizon, as they inevitably shape and modify the mentoring relationships. Conclusion. Model presented in this article offers a holistic view of mentoring in academic medicine that may help one comprehend and appreciate the complexity of influences on mentoring, and inform the future research agenda on this important topic.

  15. Enhanced organic photovoltaic properties via structural modifications in PEDOT:PSS due to graphene oxide doping

    Energy Technology Data Exchange (ETDEWEB)

    Goutham, Raj P.; Sandhya, Rani V.; Kanwat, Anil; Jang, Jin, E-mail: jjang@khu.ac.kr

    2016-02-15

    Highlights: • Graphene oxide(GO) blended with PEDOT:PSS is used as HTL for PTB7:PCBM BHJ solar cells. • Increase in conductivity due to structural alterations in PEDOT:PSS by GO addition. • The structural alterations are reaveled under Raman spectroscopy, XPS and AFM. • PEDOT:PSS changed to extended coil due to addition of GO to PEDOT:PSS. • Enhanced conductivity after GO addition to PEDOT:PSS resulted in enhanced PCE. - Abstract: Poly(3,4-thylenedioxythiophene):poly(styrene sulfonate), PEDOT:PSS is a well-known conductive polymer for hole transport in organic devices, the properties of which can be enhanced by doping. Common dopants are metal oxides and nanoparticles. In this study, addition of graphene oxide (GO) to PEDOT:PSS as a dopant is addressed in organic photovoltaics (OPVs). With GO doping, electrical conductivity and transport properties of PEDOT:PSS increases due to structural alterations in the presence of −COOH and −OH functional groups in GO. These structural alterations have been revealed under detailed study of Raman spectra, X-ray photoelectron spectroscopy (XPS) analysis, Topographical and conductive Atom force microscopy (AFM/C-AFM) mapping. OPVs fabricated using PEDOT:PSS: GO (5:1) as a hole transport layer (HTL) exhibited a power conversion efficiency (PCE) of 7.68%, which was higher than the 7.01% that was obtained for the OPVs using pristine PEDOT:PSS.

  16. Culture and Climate: Factors That Influence the Academic Success of African American Students in Prelicensure Nursing Education.

    Science.gov (United States)

    Murray, Teri A

    2015-12-01

    Despite numerous calls to diversify the nursing workforce, little progress has been made in increasing the numbers of African American graduates from prelicensure nursing programs, thus widening the diversity gap in the number of African Americans who enter the RN workforce. An integrative literature review was conducted to determine whether, from the students' perspective, the institutional climate and culture influenced their academic success. Themes of Alienation and Isolation, Persistent Determination, and Difficulty Seeking Help emerged as having an influence on students' academic success. On the basis of this review, professional development programs on topics such as implicit bias, microaggressions, and other unintentional and unconscious behaviors are recommended. Copyright 2015, SLACK Incorporated.

  17. Identification with Academics and Motivation to Achieve in School: How the Structure of the Self Influences Academic Outcomes

    Science.gov (United States)

    Osborne, Jason W.; Jones, Brett D.

    2011-01-01

    Authors since William James ("1892/1968") have implied that the structure of the self-concept can influence motivation and outcomes in particular domains. The value or importance an individual places on a domain influences how motivated that individual is to expend effort in that domain, ultimately influencing the positivity or negativity of the…

  18. Simulation-Based Business Case for PSS: A System Dynamics Framework

    DEFF Research Database (Denmark)

    Rodrigues, Vinicius Picanco; Pigosso, Daniela Cristina Antelmi; McAloone, Tim C.

    2017-01-01

    Many potential business benefits have been widely associated with the implementation of PSS. Still, several significant challenges fortransitioning to PSS persist, especially in regards to materializing the business benefits. To tackle such difficulty, this paper suggests a theorydrivenconcept of...... over time. The paper’s preliminary results identify the potential for managers andother decision-makers to use the business case simulator to assessing PSS-related business benefits and responding to multiple implementationscenarios and strategies.......Many potential business benefits have been widely associated with the implementation of PSS. Still, several significant challenges fortransitioning to PSS persist, especially in regards to materializing the business benefits. To tackle such difficulty, this paper suggests a theorydrivenconcept...... of a business case for PSS implementation and management, based on a System Dynamics simulation framework. With amaturity-oriented theoretical perspective and the associated capability concepts, the study provides insights into how the development of PSScapabilities can potentially affect corporate performance...

  19. Systematic Approach to Formulate PSS Development Project Proposals in the Fuzzy Front End

    DEFF Research Database (Denmark)

    Barquet, Ana Paula B.; Pigosso, Daniela Cristina Antelmi; Rozenfeld, Henrique

    2013-01-01

    be considered by companies during this definition. The systematization of PSS attributes may help increase the knowledge about different PSS projects that can emerge in the front end, thus leading to the discovery of opportunities that are not apparent in the existing business models and give rise to new ideas......Product-service systems (PSS) adoption has increased over the last years due to its potential for innovative value creation. However, the identification of ideas and opportunities in the innovation planning and the structuring of PSS projects are still incipient in organizations, following the same...... patterns adopted for product development. Currently, there is not a systematic approach that can be followed for the formulation of PSS proposals in the fuzzy front end. Therefore, the aim of this research is to develop a method for defining PSS project proposals based on attributes that should...

  20. Caracterização de hidrogéis condutores constituídos por PAAm e PEDOT/PSS por meio de planejamento fatorial Characterization of conducting hydrogels made with PAAm and PEDOT/PSS using factorial design

    Directory of Open Access Journals (Sweden)

    Fauze A. Aouada

    2008-06-01

    , maximum compression stress, ionic conductance and relative intensity of light transmitted through the hydrogel. ANOVA was obtained using Statistical Software®. The results of the twelve runs from the factorial design (eight runs from 2³ plus four central point replicates were applied to evaluate the main effects and their interaction, in addition to decide if they are statistically significant. The results demonstrated that mechanical stability of semi-IPN hydrogels is preserved, with PEDOT/PSS creating additional entanglements within the PAAm network. In addition, the optical properties are strongly influenced by the presence of PEDOT/PSS. In summary, hydrogels could be synthesized with controlled hydrophilicity, transparency and mechanical stability, which is important for optical devices.

  1. Academic Functioning and Peer Influences: A Short-Term Longitudinal Study of Network-Behavior Dynamics in Middle Adolescence.

    Science.gov (United States)

    Rambaran, J Ashwin; Hopmeyer, Andrea; Schwartz, David; Steglich, Christian; Badaly, Daryaneh; Veenstra, René

    2017-03-01

    In this study, the associations between peer effects and academic functioning in middle adolescence (N = 342; 14-15 years old; 48% male) were investigated longitudinally. Similarity in achievement (grade point averages) and unexplained absences (truancy) was explained by both peer selection and peer influence, net of acceptance, and connectedness. Friendships were formed and maintained when adolescents had low levels of achievement or high levels of truancy. Friends influenced one another to increase rather than decrease in achievement and truancy. Moreover, friends' popularity moderated peer influences in truancy in reciprocal friendships but not in unilateral friendships, whereas friends' acceptance moderated peer influences in achievement in both unilateral and reciprocal friendships. The findings illustrate the dynamic interplay between peer effects and academic functioning. © 2016 The Authors. Child Development © 2016 Society for Research in Child Development, Inc.

  2. The Influence of Experience and Cognitive Style on International Entrepreneurial Intentions: The Contribution of Academic Education in this Relation

    Science.gov (United States)

    Sommer, Lutz

    2013-01-01

    Introduction: The paper at hand examines the influence of Cognitive Style (CS) and International Experience (IE) on International Entrepreneurial Self-Efficacy (IESE) and International Entrepreneurial Intention (IEI) as well as the role of Academic Education (AE) in this context. Method: Based on a survey that was conducted among 111 students the…

  3. The Influence of Perceived Parental Expectations and Pressures on Women's Academic Achievement during the First Year of College

    Science.gov (United States)

    Furry, Allyson N.; Sy, Susan R.

    2015-01-01

    Previous research has examined the relationship between parental expectations and student academic performance. However, less attention has been given to the role of different parental pressures in students' achievement during their first semester of college. The purpose of this study is to examine the influence of perceived parental expectations…

  4. The Influence of the College Environment and Student Involvement on First-Year Academic Self-Concept

    Science.gov (United States)

    Stocksdale, Brent

    2015-01-01

    Enhancing the self-beliefs of college students--in particular, academic self-concept--has been suggested as one way to enhance college student success. However, the literature on the influence of college often does not clearly identify nor effectively assess the type of self-belief being investigated, and little remains known as to how and when…

  5. Academic Functioning and Peer Influences: A Short-Term Longitudinal Study of Network-Behavior Dynamics in Middle Adolescence

    Science.gov (United States)

    Rambaran, J. Ashwin; Hopmeyer, Andrea; Schwartz, David; Steglich, Christian; Badaly, Daryaneh; Veenstra, René

    2017-01-01

    In this study, the associations between peer effects and academic functioning in middle adolescence (N = 342; 14-15 years old; 48% male) were investigated longitudinally. Similarity in achievement (grade point averages) and unexplained absences (truancy) was explained by both peer selection and peer influence, net of acceptance, and connectedness.…

  6. The Influence of Student-Centered Methods in Turkish Language Instruction on Academic Success: A Meta-Analysis Study

    Science.gov (United States)

    Biçer, Nursat

    2017-01-01

    The aim of the present study is to determine the influence of student-centered methods employed in Turkish language instruction on the academic success of students through meta-analysis. To this end, a literature review was conducted on the relevant studies conducted between 2000 and 2016 in order to determine the studies were suitable for the…

  7. Influence of Formal Academic Leadership Programs on Undergraduates' Leadership Mindset: An Assessment of a Corps of Cadets Program

    Science.gov (United States)

    Dunn, Allison L.; Ho, Sarah P.; Odom, Summer F.; Perdue, Emily R.

    2016-01-01

    Students enrolled in a Corps of Cadets program at Texas A&M University [N = 336] were surveyed to examine their leadership mindsets and whether their participation in a formal academic leadership program simultaneously influenced their hierarchical and systemic-thinking preferences. No significant differences were found between students…

  8. The "Perfect" Senior (VCE) Secondary Physical Education Teacher: Student Perceptions of Teacher-Related Factors That Influence Academic Performance

    Science.gov (United States)

    Whittle, Rachael J.; Telford, Amanda; Benson, Amanda C.

    2015-01-01

    Improving student academic performance in senior-secondary education increases student opportunities for employment, training and further education. The aim of this research was to identify students', completing the Victorian Certificate of Education (VCE) Physical Education, perceptions of teacher-related factors that influence subject specific…

  9. "La Importancia de la Hermandad Latina": Examining the Psychosociocultural Influences of Latina-Based Sororities on Academic Persistence Decisions

    Science.gov (United States)

    Delgada-Guerro, Marla; Gloria, Alberta M.

    2013-01-01

    Using a psychosociocultural (PSC) approach, we examined how self-beliefs, social support, and cultural fit influenced the academic persistence decisions of 115 Latina sorority members. Upper-division Latinas reported higher self-efficacy than lower-division Latinas; however, lower-division students reported higher college stress and more perceived…

  10. Thermal operating window for PEDOT:PSS films and its related thermoelectric properties

    DEFF Research Database (Denmark)

    Stepien, Lukas; Roch, Aljoscha; Tkachov, Roman

    2017-01-01

    a morphological and a chemical part. In the range of room temperature and ∼160 °C PEDOT:PSS films follow the known exponential degradation which imposes morphological degradation, while at higher temperatures this law is not suitable to match the experimental data. Thus we extended the known exponential equation...... treated PEDOT:PSS films at potential operating temperatures. Here we observed the electrical degradation of the film up to complete failure. Further, the thermal aging of PEDOT:PSS still lacks of understanding. It is pointed out that PEDOT:PSS films show a complex degradation mechanism which includes...

  11. The Roll of NaPSS Surfactant on the Ceria Nanoparticles Embedding in Polypyrrole Films

    Directory of Open Access Journals (Sweden)

    Simona Popescu

    2016-01-01

    Full Text Available Cerium oxide nanoparticles (CeO2 NPs in crystalline form have been synthesized by a coprecipitation method. CeO2 nanoparticles were then embedded in polypyrrole (PPy films during the electropolymerization of pyrrole (Py on titanium substrate. The influence of poly(sodium 4-styrenesulfonate (NaPSS surfactant used during polymerization on the embedding of CeO2 NPs in polypyrrole films was investigated. The new films were characterized in terms of surface analysis, wettability, electrochemical behaviour, and antibacterial effect. The surface and electrochemical characterization revealed the role of surfactant on PPy doping process cerium oxide incorporation. In the presence of surfactant, CeO2 NPs are preferentially embedded in the polymeric film while, without surfactant, the ceria nanoparticles are quasiuniformly spread as agglomerates onto polymeric films. The antibacterial effect of studied PPy films was substantially improved in the presence of cerium oxide and depends by the polymerization conditions.

  12. Influence of Learning Environment on Students' Academic Achievement in Mathematics: A Case Study of Some Selected Secondary Schools in Yobe State-Nigeria

    Science.gov (United States)

    Shamaki, Timothy Ado

    2015-01-01

    The purpose of the study was to determine the influence of learning environment on students' academic achievement in mathematics at senior secondary school level. Thus the study investigated some components of learning environment and their possible influence on students' academic achievement in mathematics. A sample of 337 randomly selected SS II…

  13. Quasi-one dimensional in-plane conductivity in filamentary films of PEDOT:PSS

    NARCIS (Netherlands)

    Ruit, K. van de; Cohen, R.I.; Bollen, D.; Mol, T. van; Yerushalmi-Rozen, R.; Janssen, R.A.J.; Kemerink, M.

    2013-01-01

    The mechanism and magnitude of the in-plane conductivity of poly(3,4-ethy-lenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films is determined using temperature dependent conductivity measurements for various PEDOT:PSS weight ratios with and without a high boiling solvent (HBS). Without

  14. Risk Management Challenges in Large-scale Energy PSS

    DEFF Research Database (Denmark)

    Tegeltija, Miroslava; Oehmen, Josef; Kozin, Igor

    2017-01-01

    Probabilistic risk management approaches have a long tradition in engineering. A large variety of tools and techniques based on the probabilistic view of risk is available and applied in PSS practice. However, uncertainties that arise due to lack of knowledge and information are still missing...... adequate representations. We focus on a large-scale energy company in Denmark as one case of current product/servicesystems risk management best practices. We analyze their risk management process and investigate the tools they use in order to support decision making processes within the company. First, we...... identify the following challenges in the current risk management practices that are in line with literature: (1) current methods are not appropriate for the situations dominated by weak knowledge and information; (2) quality of traditional models in such situations is open to debate; (3) quality of input...

  15. Coalescence Dynamics of PEDOT:PSS Droplets Impacting at Offset on Substrates for Inkjet Printing.

    Science.gov (United States)

    Sarojini Kg, Kalpana; Dhar, Purbarun; Varughese, Susy; Das, Sarit K

    2016-06-14

    The dynamics of coalescence and consequent spreading of conducting polymer droplets on a solid substrate impacting at an offset are crucial in understanding the stability of inkjet printed patterns, which find application in organic flexible electronic devices. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) ( PSS) dispersion in water is a widely used commercial conducting polymer for the fabrication of electron devices. The effects of droplet spacing, impact velocity, substrate hydrophilicity, polymer concentration, and charges on the coalescence of two sessile droplets have been experimentally investigated, and the characteristics of dynamic spreading during the coalescence process are determined through image processing. The equilibrium spreading length of the coalesced droplets decreases with concentration and spacing of the droplets, revealing the necessity of optimum fluid properties (viscosity and surface tension) for the stability of the desired pattern. The droplet's impact energy governs the maximum extent of spreading and receding dynamics, as the velocity gradients developed in polymer droplets during coalescence are a function of the inertia of the fluid elements. Hydrophilicity affects the maximum spreading extent but it has no influence on the equilibrium droplet diameter. The spreading length dynamics of charge-neutralized PSS is found similar to the charged droplets, which show that the charged nature of the polymer does not affect the coalescence behavior. Furthermore, different spreading regimes are identified and the governing forces in each regime are described using a semianalytical formulation derived for the coalescence of two droplets. The model has been found to accurately provide insight into the various mechanisms that play a role during the complex spreading event.

  16. Examining reciprocal influences among family climate, school attachment, and academic self-regulation: Implications for school success.

    Science.gov (United States)

    Xia, Mengya; Fosco, Gregory M; Feinberg, Mark E

    2016-06-01

    Guided by family systems and ecological theories, this study examined the multicontextual implications of family, school, and individual domains for adolescents' school success. The first goal of this study was to examine reciprocal influences among family climate, school attachment, and academic self-regulation (ASR) during the middle school years. The second goal was to test the relative impact of each of these domains on adolescents' school adjustment and academic achievement after the transition to high school. We applied a cross-lag structural equation modeling approach to longitudinal data from 979 students in the 6th grade and their families, followed over 5 measurement occasions, from 6th through 9th grade. Controlling for family income, parent education, and adolescent gender, the results revealed reciprocal relationships between the family climate and school attachment over time; both of these factors were related to increases in ASR over time. In turn, ASR was a robust predictor of academic success, with unique associations with school adjustment and academic achievement. Family climate and school adjustment had modest to marginal associations with school adjustment, and no association with academic achievement. Applications of these findings for family school interventions are discussed. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  17. The Influence of Reciprocal interactions in the Family on Academic Performance among Secondary School Students in Kenya

    Directory of Open Access Journals (Sweden)

    Rael Achieng Ogwari

    2014-08-01

    Full Text Available This study aimed to investigate the influence of reciprocal interactions in the family on academic performance among secondary school students in Siaya District. Stratified and purposive sampling techniques were used to select the study participants. The sample comprised of a total of 243 students (154 boys and 89 girls drawn from 27 public coeducational schools in the district.  Data was collected using student questionnaires. The researchers’ judgment of the representativeness of the items in the questionnaire to the study topic was used to determine content validity of the instrument while Cronbach’s alpha coefficient was used to ascertain validity and reliability of the instrument. Linear regression analysis and one way Analysis of Variance were used to analyze data. The results revealed significant relationship between reciprocal interactions in the family and academic performance of students. There was positive correlation between parental expectation, autonomy granting, cross-sex behaviour and students’ academic performance. Siblings’ sex dyads and birth order were also found to correlate with students’ academic performance. The findings may be used by policy makers to sensitize parents and students on the significance of specific interactions in the family on academic performance.

  18. Examining Reciprocal Influences Among Family Climate, School Attachment, and Academic Self-Regulation: Implications for School Success

    Science.gov (United States)

    Xia, Mengya; Fosco, Gregory M.; Feinberg, Mark E.

    2015-01-01

    Guided by family systems and ecological theories, this study examined the multi-contextual implications of family, school, and individual domains for adolescents' school success. The first goal of this study was to examine reciprocal influences among family climate, school attachment, and academic self-regulation (ASR) during the middle school years. The second goal was to test the relative impact of each of these domains on adolescents' school adjustment and academic achievement after the transition to high school. We applied a cross-lag structural equation modeling approach to longitudinal data from 979 6th grade students and their families, followed over five measurement occasions, from 6th through 9th grade. Controlling for family income, parent education, and adolescent gender, the results revealed reciprocal relationships between the family climate and school attachment over time; both of these factors were related to increases in ASR over time. In turn, ASR was a robust predictor of academic success, with unique associations with school adjustment and academic achievement. Family climate and school adjustment had modest to marginal associations with school adjustment, and no association with academic achievement. Applications of these findings for family-school interventions are discussed. PMID:26376426

  19. [Socio-economic and psycho-affective factors and their influence on academic performance of residents in Obstetrics and Gynecology].

    Science.gov (United States)

    Manterola Álvarez, David

    2015-03-01

    Academic performance is the mean objective of the teaching-learning process, but there are many other variables or factors outside the OB/GYN resident involved in this process, such as those related to the environment in which they operate, teachers, interaction with their peers, family, society, and many other factors contained individually, such as learning styles, motivation, study habits, personality traits, among others. Identify which are the main socio-economic and psycho-affective factors that influence on academic performance of residents in Obstetrics and Gynecology. Observational, cross-sectional quantitative, correlational and non-experimental study in Obstetrics and Gynecology residents of a public general hospital tertiary care. A type survey to obtain data and deepen personal and socioeconomic status of each resident instrument was designed. Females predominated with 15 cases and only 5 were male. Sixteen of medical residents claimed that having a good habit of sleep helps improve their academic performance and their performance in academic and healthcare activities. Fifteen felt that work much better with peers of the opposite sex. Ten felt that developing a type of self-directed learning contributes greatly to improve their performance and 19 felt that having a mentor during residency contributes to improve their academic performance. Fifteen reported being victim of abuse or discrimination from their peers. Sixteen claimed to have been very sad or depressed at some point during residency. Eight consumed alcohol and seven used tobacco to relax.

  20. Supporting the Development of Environmentally Sustainable PSS by Means of the Ecodesign Maturity Model

    DEFF Research Database (Denmark)

    Pigosso, Daniela Cristina Antelmi; McAloone, Tim C.

    2015-01-01

    for the integration of the new practices for PSS development into the EcoM2. In total, 17 best practices for PSS development were identified in this research, and integrated into the EcoM2. The proposed EcoM2 for PSS model has the potential to support the development of environmentally sustainable PSS.......Despite their substantial potential for enabling increased environmental performance, product/service-systems (PSS) are not intrinsically environmentally sustainable. In order to ensure increased sustainability performance, PSSand related business models needs to be developed taking into account...... best practice for ecodesign implementation and management. The Ecodesign Maturity Model (EcoM2) is a management framework that supports manufacturing companies to consistently and systematicallyimplement ecodesign, based on a step-by-step approach. EcoM2 contains a database containing more than 600...

  1. Industry specific PSS: A study of opportunities and barriers for maritime suppliers

    DEFF Research Database (Denmark)

    Andersen, Jakob Axel Bejbro; McAloone, Tim C.; Garcia i Mateu, Adrià

    2013-01-01

    Product-Service System (PSS) business models are finding applications with suppliers and manufacturers across industries, but the models have yet to establish a strong foothold in the maritime sector. A number of metrics for evaluating the attractiveness of PSS business models have been proposed...... in chiefly design research and operations management literature. This paper applies a number of these metrics to the maritime sector using data from a number of maritime suppliers. It is found that the industry is, at least in some aspects, attractive from this PSS metrics standpoint. To explain the inherent...... lack of PSS maturity in the industry despite this metrics-based conclusion, the discussion moves beyond the quantitative factors and considers a number of organisational, structural and cultural issues that stand in the way of PSS. This paper is based on the initial responses provided by maritime...

  2. Academic Achievement as a Moderator of Genetic Influences on Alcohol Use in Adolescence

    Science.gov (United States)

    Benner, Aprile D.; Kretsch, Natalie; Harden, K. Paige; Crosnoe, Robert

    2014-01-01

    Prior research suggests a link between academic performance and alcohol use during adolescence, but the degree to which this association reflects actual protective effects continues to be debated. We investigated the role of genetic factors in the association between academic achievement and adolescent alcohol use and whether achievement might…

  3. Influence of School-Image on Academic Self-Efficacy Belief

    Science.gov (United States)

    Gafoor, K. Abdul; Ashraf, P. Muhammed

    2012-01-01

    This study explores the academic self-efficacy and School-Image among higher secondary school students, on a sample of 652 XIth standard students drawn from Kerala, adopting proportionate stratified random sampling. The data was collected using Academic Self-Efficacy Scale and School-Image Scale. Significant difference exist in School-Image of…

  4. Change of Academic Major: The Influence of Broad and Narrow Personality Traits

    Science.gov (United States)

    Foster, N. A.

    2017-01-01

    The relationship between academic major change and ten personality traits (the Big Five and five narrow traits), was investigated in a sample of 437 college undergraduates. Contrary to expectations, Career Decidedness and Optimism were positively related to academic major change, regardless of class ranking. When parsing data by college year,…

  5. Influences of Co-Curricular Participation on Academic Success and Persistence among Sophomore Students

    Science.gov (United States)

    Pillar, James D.

    2016-01-01

    This study examined 690 sophomore students who entered a small private institution at the beginning of the 2013-2014 academic year. It analyzed relationships among sophomore participation in co-curricular activities and academic performance measured by grade-point averages and persistence measured by continued enrollment. Significant relationships…

  6. The Influence of Dispositional Optimism and Gender on Adolescents' Perception of Academic Stress

    Science.gov (United States)

    Huan, Vivien S.; Yeo, Lay See; Ang, Rebecca P.; Chong, Wan Har

    2006-01-01

    This study investigated the role of optimism together with gender, on students' perception of academic stress. Four hundred and thirty secondary school students from Singapore participated in this study and data were collected using two self-report measures: the Life Orientation Test and the Academic Expectation Stress Inventory. Results revealed…

  7. The Influence of Self-Compassion on Academic Procrastination and Dysfunctional Attitudes

    Science.gov (United States)

    Iskender, Murat

    2011-01-01

    In the present study, aims were (1) to determine gender differences in self-compassion, academic procrastination, and dysfunctional attitudes and (2) to examine the relationships between self-compassion, academic procrastination, and dysfunctional attitudes. Participants were 251 university students who completed a questionnaire package that…

  8. Influence of Parenting Styles on the Adjustment and Academic Achievement of Traditional College Freshmen.

    Science.gov (United States)

    Hickman, Gregory P.; Bartholomae, Suzanne; McKenry, Patrick C.

    2000-01-01

    Examines the relationship between parenting styles and academic achievement and adjustment of traditional college freshmen (N=101). Multiple regression models indicate that authoritative parenting style was positively related to student's academic adjustment. Self-esteem was significantly predictive of social, personal-emotional, goal…

  9. Product/Service-System Origins and Trajectories: A Systematic Literature Review of PSS Definitions and their Characteristics

    DEFF Research Database (Denmark)

    Haase, Ronja P.; Pigosso, Daniela Cristina Antelmi; McAloone, Tim C.

    2017-01-01

    their interrelationships. As the result of a strict protocol, the paper identifies 52 prominent definitions related to PSS, where the citationrelations between the prominent definitions are studied and graphically illustrated. The definitions are furthermore analyzed to identify commonPSS definition characteristics......Literature provides multiple definitions on Product/Service-Systems (PSS), and as the field develops, certain trajectories emerge. The purpose ofthis article is to provide an overview of the stabilization of PSS definitions within PSS research, by presenting the most prominent PSS definitionsand...... and eleven different characteristics identified. Descriptive analysis is carried out on the identified PSS definitioncharacteristics, to determine commonalties and differences in the field. Even though the literature provides many different variations of PSS definitions, there is certain convergence...

  10. The negative influence of significant others on high academic achieving school pupils' choice of nursing as a career.

    Science.gov (United States)

    Neilson, Gavin R; McNally, Jim

    2013-03-01

    The International Council of Nurses proposes that the shortage of nurses is global in scale and is expected to become much worse in the years ahead. A major factor impacting on the worldwide nursing shortage is the diminishing number of young people choosing nursing as a career (International Council of Nurses, 2008). One important dimension of the school pupils' career choice process is their interactions with significant others and the influence of these significant others (Hodkinson and Sparkes, 1997). As Schools/Departments of Nursing endeavour to attract more intellectual school leavers it is important to examine what advice and opinions are significant others giving regarding nursing as a career choice and how influential is this advice. This paper is based on interview data from 20 high academic achieving 5th and 6th year school pupils in Scotland, paradigmatic cases from a larger sample, who had considered nursing as a possible career choice within their career preference cluster, but then later disregarded nursing and decided to pursue medicine or another health care profession. The data was particularly striking in revealing the negative influence of significant others on high academic achieving school pupils' choice of nursing as a career. The influence of significant others, these being specifically parents, guardians, guidance teachers and career advisors was very apparent in the data in that they had a very negative view regarding nursing as a career choice for high academic achieving school pupils. Copyright © 2012 Elsevier Ltd. All rights reserved.

  11. Epistemological beliefs and approaches to learning: their change through secondary school and their influence on academic performance.

    Science.gov (United States)

    Cano, Francisco

    2005-06-01

    In recent decades, two lines of research, phenomenographic and meta-cognitive, have examined students' approaches and epistemological beliefs about learning. To date there has been very little research describing the change in epistemological beliefs in European secondary students, or analysing interrelationships between epistemological beliefs and approaches in order to explain their influence on academic performance. The first aim of this investigation is to analyse the change in epistemological beliefs and learning approaches in secondary students as they progress through their studies. The second aim is to examine the effects of epistemological beliefs on learning approaches, and learning approaches on academic performance. About 1,600 Spanish students, boys and girls, from several secondary schools took part in the study. They were between 12 and 20 years old and their average age was 14.79 years. Measures of epistemological beliefs (EQ: Epistemological Questionnaire), learning approaches (LPQ: Learning Process Questionnaire), and academic performance were obtained. Confirmatory factor analysis was used to examine the dimensionality of the EQ and LPQ questionnaires. In order to achieve our two aims, different statistical techniques were used: MANOVA and ANOVA for our first aim, and structural equation modelling for our second aim. Throughout secondary education epistemological beliefs undergo change, becoming more realistic and complex, and deep-approach scores decline significantly. It was shown that, as predicted, epistemological beliefs influenced academic achievement directly, and also indirectly via students' learning approaches. Our findings point to two conclusions. First, epistemological beliefs and learning approaches change as pupils advance in their studies. Second, the relationship between epistemological beliefs and academic achievement is mediated by approaches to learning.

  12. Generational influences in academic emergency medicine: teaching and learning, mentoring, and technology (part I).

    Science.gov (United States)

    Mohr, Nicholas M; Moreno-Walton, Lisa; Mills, Angela M; Brunett, Patrick H; Promes, Susan B

    2011-02-01

    For the first time in history, four generations are working together-traditionalists, baby boomers, generation Xers (Gen Xers), and millennials. Members of each generation carry with them a unique perspective of the world and interact differently with those around them. Through a review of the literature and consensus by modified Delphi methodology of the Society for Academic Emergency Medicine Aging and Generational Issues Task Force, the authors have developed this two-part series to address generational issues present in academic emergency medicine (EM). Understanding generational characteristics and mitigating strategies can help address some common issues encountered in academic EM. Through recognition of the unique characteristics of each of the generations with respect to teaching and learning, mentoring, and technology, academicians have the opportunity to strategically optimize interactions with one another. © 2011 by the Society for Academic Emergency Medicine.

  13. The influence of parenting style on academic achievement and career path

    National Research Council Canada - National Science Library

    Zahed Zahedani, Zahra; Rezaee, Rita; Yazdani, Zahra; Bagheri, Sina; Nabeiei, Parisa

    2016-01-01

    .... The current study has been done with the purpose of investigating the relationship between parenting styles, academic achievement and career path of students at Shiraz University of Medical Sciences...

  14. Ethnic segregation and perceived discrimination in college: Mutual influences and effects on social and academic life

    OpenAIRE

    Levin, Shana; Van Laar, Colette; Foote, Winona

    2006-01-01

    This study examined relationships among same-ethnicity friendships, perceptions of ethnic discrimination, and social and academic adjustment in college using a large longitudinal sample of White, Asian, Latino, and African American students. Results demonstrated that Latino students who had more in-group friends during college exhibited reduced belonging and academic performance at the end of college. Perceived discrimination also had negative effects on Latino students' sense of belonging. F...

  15. Influence of sleep disturbance, fatigue, vitality on oral health and academic performance in indian dental students

    OpenAIRE

    Asawa, Kailash; Sen, Nandini; Bhat, Nagesh; Tak, Mridula; SULTANE, PRATIBHA; MANDAL, ARITRA

    2017-01-01

    Background Oral health and academic performance are important contributing factors for a student?s professional life. Countless factors affect both, among which sleep, vitality and fatigue are less explored areas that also have a strong impact. Objective The objective of the study was to assess the association of sleep disturbances, fatigue and vitality with self reported oral health status, oral hygiene habits and academic performance of dental students of Udaipur. Methods A descriptive cros...

  16. USE OF VIDEOGAMES AND COMPUTER GAMES: INFLUENCES ON ATTENTION, MEMORY, ACADEMIC ACHIEVEMENT AND PROBLEMS BEHAVIOR

    OpenAIRE

    Harold Germán Rodríguez Celis; Marithza Sandoval Escobar

    2011-01-01

    This study was designed to identify the relationship between video and computergames use on attention, memory, academic performance and problemsbehavior in school children in Bogotá. Memory and attention were assessedusing a set of different scales of ENI Battery (Matute, Rosselli, Ardila, & Ostrosky-Solís, 2007). For Academic performance, school newsletters were used.Behavioral problems were assessed through the CBCL / 6 -18 questionnaire(Child Behavior Checklist) of (Achenbach & Edelbrock, ...

  17. Influence of music training on academic examination-induced stress in Thai adolescents.

    Science.gov (United States)

    Laohawattanakun, Janejira; Chearskul, Supornpim; Dumrongphol, Hattaya; Jutapakdeegul, Nuanchan; Yensukjai, Juntima; Khumphan, Nipaporn; Niltiean, Songwit; Thangnipon, Wipawan

    2011-01-10

    Several pieces of evidence suggest that academic examinations fulfill the classical requirement of a psychological stressor. Academic examinations represent a stressful challenge to many students, but studies on examination-dependent corticosteroid response, a sensitive physiological indicator of a stress response, are inconsistent. In addition, several studies showed that music can decrease cortisol and adrenocorticotropic hormone (ACTH) levels, and other studies have found that music also may enhance a variety of cognitive functions, such as attention, learning, communication and memory. The present study investigated cortisol response in saliva of Thai adolescents taking academic examinations and analyzed the differences of the stress response between musician and control subjects. Also, we observed whether the academic examination-dependent corticosteroid response affected learning and memory in the test subjects, which comprised 30 musician and 30 control students, age ranging from 15 to 17 years. Mathematical examinations were used as the stressor. Pre- and post-academic examination saliva cortisol levels were measured including self-estimated stress levels. Results showed that the pre-academic examination saliva cortisol concentrations of the musician group are significantly lower than those of the control group, whereas there is no difference in the stress inventory scores. Interestingly, among students with grade point average (GPA) of >3.50, pre-academic examination cortisol levels are significantly lower in the musician compared with control group. This study suggests that under academic examination-induced stress condition, music training can reduce saliva cortisol level in Thai adolescents. Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.

  18. The influence of parenting style on academic achievement and career path

    OpenAIRE

    ZAHRA ZAHED ZAHEDANI; RITA REZAEE; ZAHRA YAZDANI; SINA BAGHERI; PARISA NABEIEI

    2016-01-01

    Introduction Several factors affect the academic performance of college students and parenting style is one significant factor. The current study has been done with the purpose of investigating the relationship between parenting styles, academic achievement and career path of students at Shiraz University of Medical Sciences.???? Methods This is a correlation study carried out at Shiraz University of Medical Sciences. Among 1600 students, 310 students were selected randomly as the sample. Bau...

  19. Psychopathological factors that can influence academic achievement in early adolescence: a three-year prospective study.

    Science.gov (United States)

    Voltas, Núria; Hernández-Martínez, Carmen; Aparicio, Estefania; Arija, Victoria; Canals, Josefa

    2014-12-30

    This three-phase prospective study investigated psychosocial factors predicting or associated with academic achievement. An initial sample of 1,514 school-age children was assessed with screening tools for emotional problems (Screen for Childhood Anxiety and Related Emotional Disorders; Leyton Obsessional Inventory-Child Version; Children's Depression Inventory). The following year, 562 subjects (risk group/without risk group) were re-assessed and attention deficit/hyperactivity disorder (ADHD) was assessed. Two years later, 242 subjects were followed, and their parents informed about their academic achievement. Results showed that early depression (phase 1 B = -.130, p = .001; phase 1 + phase 2 B = -.187, p < .001), persistent anxiety symptoms (phase 1 + phase 2 B = -1.721, p = .018), and ADHD were predictors of lower academic achievement (phase 1 + phase 2 B = -3.415, p = .005). However, some anxiety symptoms can improve academic achievement (Social phobia B = .216, p = .018; Generalized anxiety B = .313, p < .001). Socio-economic status (SES) was positively related to academic achievement. We can conclude that in the transition period to adolescence, school-health professionals and teachers need to consider the emotional issues of students to avoid unwanted academic outcomes.

  20. Influence of the motivational class climate on adolescents’ school engagement and their academic achievement

    Directory of Open Access Journals (Sweden)

    Melchor GUTIÉRREZ

    2017-06-01

    Full Text Available The scientific literature provides empirical evidence on the relationship between school engagement and numerous important variables of the adolescents’ educational context. The school engagement has been related, among other important constructs, with burnout of both teachers and students, school performance, satisfaction with the school, behavioral disruption, goal orientation and motivational climate in the classroom. Because of it, the aim of this study was to analyze the relationship between perceived motivational class climate and students’ academic achievement, with school engagement acting as a mediator. A sample of 2028 teenagers completed various instruments to measure the perception of motivational climate, perceived basic psychological needs satisfaction, perceived autonomy support provided by the teacher, and academic achievement. The data were analyzed using a structural equation model with observed variables (path analysis. The results have shown a significant relationship between motivational climate and school engagement, and of this with academic achievement. It should also be highlighted the direct relationship of perceived competence and perceived autonomy support with perception of academic success. Of the three variables to be predicted (Portuguese and Mathematics marks and Academic success, the largest percentage of variance explained was the one of academic success. The results are discussed within the framework of achievement goal theory, the self-determined motivation, and in terms of contributing practical issues to adolescents’ teaching-learning process.

  1. PEDOT:PSS-Containing Nanohydroxyapatite/Chitosan Conductive Bionanocomposite Scaffold: Fabrication and Evaluation

    Directory of Open Access Journals (Sweden)

    Alireza Lari

    2016-01-01

    Full Text Available Conductive poly(3,4-ethylenedioxythiophene-poly(4-styrene sulfonate (PEDOT:PSS was incorporated into nanohydroxyapatite/chitosan (nHA/CS composite scaffolds through a freezing and lyophilization technique. The bionanocomposite conductive scaffold was then characterized using several techniques. A scanning electron microscope image showed that the nHA and PEDOT:PSS were dispersed homogeneously in the chitosan matrix, which was also confirmed by energy-dispersive X-ray (EDX analysis. The conductive properties were measured using a digital multimeter. The weight loss and water-uptake properties of the bionanocomposite scaffolds were studied in vitro. An in vitro cell cytotoxicity test was carried out using mouse fibroblast (L929 cells cultured onto the scaffolds. Using a freezing and lyophilization technique, it was possible to fabricate three-dimensional, highly porous, and interconnected PEDOT:PSS/nHA/CS scaffolds with good handling properties. The porosity was 74% and the scaffold’s conductivity was 9.72±0.78 μS. The surface roughness was increased with the incorporation of nHA and PEDOT:PSS into the CS scaffold. The compressive mechanical properties increased significantly with the incorporation of nHA but did not change significantly with the incorporation of PEDOT:PSS. The PEDOT:PSS-containing nHA/CS scaffold exhibited significantly higher cell attachment. The PEDOT:PSS/nHA/CS scaffold could be a potential bionanocomposite conductive scaffold for tissue engineering.

  2. Nozzle Printed-PEDOT:PSS for Organic Light Emitting Diodes with Various Dilution Rates of Ethanol

    Directory of Open Access Journals (Sweden)

    Dai Geon Yoon

    2018-01-01

    Full Text Available In this study, we investigated the ink formulation of poly(3,4-ethylenedioxythiophene polystyrene sulfonate (PEDOT:PSS as the hole injection layer (HIL in an organic light emitting diode (OLED structure. Generally, in a PEDOT:PSS solution, water is incorporated in the solution for the solution process. However, the fabrication of thin film which contained the water, main solvent, could not easily form by using printing technology except spin-coating process because of the high surface tension of water. On the other hand, mixing PEDOT:PSS solution and ethanol (EtOH, a dilution solvent, could restrain the non-uniform layer that forms by the high surface tension and low volatility of water. Therefore, we printed a PEDOT:PSS solution with various concentrations of EtOH by using a nozzle printer and obtained a uniform pattern. The line width of PEDOT:PSS diluted with 90% (volume ratio ehtanol was measured as about 4 mm with good uniformity with a 0.1 mm nozzle. Also, imaging software and a scanning electron microscope (SEM were used to measure the uniformity of PEDOT:PSS coated on a substrate. Finally, we fabricated a green phosphorescent OLED device with printed-PEDOT:PSS with specific concentrations of EtOH and we achieved a current efficiency of 27 cd/A with uniform quality of luminance in the case of device containing 90% EtOH.

  3. For the Love of Music: The Influence of After-School Music Programs on the Academic and Non-Cognitive Development of Disadvantaged Youth

    Science.gov (United States)

    Andreassen, Alexandra

    2013-01-01

    A variety of recent research has shown that the academic achievement gap has been growing between low- and middle-income students. Socioeconomic status has proven to have a large influence on academic attainment as well as the educational opportunities that a child is offered. This paper argues that, because poverty significantly affects children…

  4. The Emotional Impact Nursing Faculty Experience in Relationship to Student Academic Dishonesty and the Social and Political Factors That Influence Their Decision to Report Dishonesty

    Science.gov (United States)

    Scebold, Jody L.

    2016-01-01

    The purpose of the study was to explore the emotional impact nursing faculty experience in relationship to nursing student academic dishonesty and the social and political factors that influence their decision to report suspected acts of academic dishonesty. The study was based on Fontana's 2009 study titled "Nursing Faculty Experiences of…

  5. Influences of Self-Beliefs, Social Support, and Comfort in the University Environment on the Academic Nonpersistence Decisions of American Indian Undergraduates.

    Science.gov (United States)

    Gloria, Alberta M.; Kurpius, Sharon E. Robinson

    2001-01-01

    The decisions of 83 American Indian undergraduates to drop out of school were investigated based on the influence of their self-beliefs, social support, and comfort. Although all three accounted for academic nonpersistence decisions, social support was the strongest predictor. Discusses implications for increasing academic persistence of students,…

  6. Factors Influencing Academic Performance Of Standard Eight Girls In National Examinations In Public Primary Schools A Case Of Matungu Division.

    Directory of Open Access Journals (Sweden)

    Oparanya Wamukoya Windrick

    2015-06-01

    Full Text Available ABSTARCT This study is designed to establish the factors influencing academic of standard eight girls in public primary schools in National exams in Matungu division. The researcher aimed at finding out why there is increased low performance of girls in public schools despite the fact that they are assessed through periodic performance tests do continuous assessment tests CATS midterm carry out tuition and the provision of free primary education which is aimed at improving academic performance. This study adapted a descriptive survey design as a major method of research where data was collected by the researcher members of a population under study. The target population comprised of Head teachers teachers pupils parents and parent schools representatives. Purposive sampling and simple random technique were used. Data was collected by use of questionnaires and interview guides. Data was analyzed by use of descriptive statistics constituting frequencies and percentages.The study established that girls were exposed to harsh school environmental conditions they walked long distances to school schools lacked facilities like toilets libraries and were exposed to male pest teachers. There were also teacher factors like training teacher shortage and motivation that affected girls performance.The study came up with recommendations for improvement of girls academic performance. More public schools should be build to reduce on distance and also overpopulation. The ministry of Education should monitor and evaluate the academic performance of girls in rural areas. The government should put up strict rules on pest teachers. The ministry should hire more teachers.

  7. How do academic stress and leisure activities influence college students' emotional well-being? A daily diary investigation.

    Science.gov (United States)

    Zhang, Jieting; Zheng, Yao

    2017-10-01

    China has one of the largest bodies of college students who face growing academic stress that influences their well-being. Using a daily diary method in a group of Chinese college students (n = 139, mean age = 19.50 years, 27% males) who reported their daily positive and negative emotion consecutively for two weeks, this study investigated the dynamic relations between daily academic stress, leisure activities engagement, and emotion, and further examined the moderation of sex on these links. The results showed that at both between- and within-person level, academic stress was positively associated with negative emotion, and leisure activities engagement was positively associated with positive emotion. The association between leisure activities engagement and positive emotion were stronger among female students than among male students. These results suggest that effectively reducing academic stress and actively engaging in leisure activities are both important in promoting and enhancing daily emotional well-being. Copyright © 2017. Published by Elsevier Ltd.

  8. Development of an Innovation Model Based on a Service-Oriented Product Service System (PSS

    Directory of Open Access Journals (Sweden)

    Seungkyum Kim

    2015-10-01

    Full Text Available Recently, there have been many attempts to cope with increasingly-diversified and ever-changing customer needs by combining products and services that are critical components of innovation models. Although not only manufacturers, but also service providers, try to integrate products and services, most of the previous studies on Product Service System (PSS development deal with how to effectively integrate services into products from the product-centric point of view. Services provided by manufacturers’ PSSes, such as delivery services, training services, disposal services, and so on, offer customers ancillary value, whereas products of service providers’ PSSes enrich core value by enhancing the functionality and quality of the service. Thus, designing an effective PSS development process from the service-centric point of view is an important research topic. Accordingly, the purpose of this paper is to propose a service-oriented PSS development process, which consists of four stages: (1 strategic planning; (2 idea generation and selection; (3 service design; and (4 product development. In the proposed approach, the PSS development project is initiated and led by a service provider from a service-centric point of view. From the perspective of methodology, customer needs are converted into product functions according to Quality Function Deployment (QFD, while Analytic Hierarchy Process (AHP is employed to prioritize the functions. Additionally, this paper illustrates a service-oriented PSS development that demonstrates the application of the proposed process. The proposed process and illustration are expected to serve as a foundation for research on service-oriented PSS development and as a useful guideline for service providers who are considering the development of a service-oriented PSS.

  9. Influence of the Academic Library on US University Reputation: A Webometric Approach

    Directory of Open Access Journals (Sweden)

    Enrique Orduña-Malea

    2013-09-01

    Full Text Available A previous study conducted through a survey of academic libraries at 100 US universities with the highest total expenditures on academic libraries according to data presented by the National Center for Education Statistics (NCES. The results pointed out an unexpectedly weak correlation among web variables, concluding that the complex online structure of US academic libraries was the main driver of this effect. The present study replicates this research applying the same web indicators but at the university level, to check whether the weak compactness among web indicators persists. Additionally, the percentage (in terms of web data of academic libraries at universities is analyzed. Finally, the correlation among web and economic indicators (research expenditures, student population, and reputational rank position for universities is calculated to check for a possible relationship. Results confirm a strong correlation among university web indicators. Otherwise, the strength of academic libraries at universities is moderate in terms of page count, but weak in terms of visits. Finally, the correlation among university web indicators and research expenditures depends on student population.

  10. The influence of psychosocial factors on academic performance of adolescents: a quality assurance project.

    Science.gov (United States)

    Gulzar, Saleema A; Ali, Tazeen Saeed; Aijaz, Amina; Hussain, Neesha

    2010-07-01

    Adolescence is a time of rapid psychological and physiological changes and is associated with anxiety and mental distress. This project looks at the potential of school-based programs to reduce these negative effects of academic performance in both the short- and long-term. This study was conducted in a private school in Karachi, Pakistan between October 1998 and December 2006 on 305 students with low academic performance. Results show that students scoring low grades had a mean of 55 + 2.8 and postintervention score of 56 + 2.6. The intervention package significantly created a difference in reducing the number of students receiving low grades. Qualitative analysis showed that study participants had enhanced self-esteem, confidence levels, positive attitudes towards learning, improved time management and decision-making skills. This suggests that in an academic institution, the presence of a professional support system enhances learning and coping mechanisms.

  11. The influence of habitus in the relationship between cultural capital and academic achievement.

    Science.gov (United States)

    Gaddis, S Michael

    2013-01-01

    Scholars routinely use cultural capital theory in an effort to explain class differences in academic success but often overlook the key concept of habitus. Rich, longstanding debates within the literature suggest the need for a closer examination of the individual effects of cultural capital and habitus. Drawing upon the writings of Pierre Bourdieu, I use a longitudinal dataset to examine the effects of multiple operationalizations of cultural capital on academic achievement and the mediating effects of habitus. Using first difference models to control for time-invariant unobserved characteristics, I find that typical operationalizations of cultural capital (i.e. high-arts participation and reading habits) have positive effects on GPA that are completely mediated through habitus. These results stress the importance of habitus in the relationship between cultural capital and academic achievement for disadvantaged youth. Copyright © 2012 Elsevier Inc. All rights reserved.

  12. USE OF VIDEOGAMES AND COMPUTER GAMES: INFLUENCES ON ATTENTION, MEMORY, ACADEMIC ACHIEVEMENT AND PROBLEMS BEHAVIOR

    Directory of Open Access Journals (Sweden)

    Harold Germán Rodríguez Celis

    2011-12-01

    Full Text Available This study was designed to identify the relationship between video and computergames use on attention, memory, academic performance and problemsbehavior in school children in Bogotá. Memory and attention were assessedusing a set of different scales of ENI Battery (Matute, Rosselli, Ardila, & Ostrosky-Solís, 2007. For Academic performance, school newsletters were used.Behavioral problems were assessed through the CBCL / 6 -18 questionnaire(Child Behavior Checklist of (Achenbach & Edelbrock, 1983. 123 children and99 parents were enrolled in 2 factorial design experimental studies. The resultsdid not support the hypothesis of a significant change in memory tests, orintra-subject selective visual and hearing attention. However, these variablesshowed significant differences among children exposed to habitual videogamesconsumption. No differences were found between the level of regular videogames consumption in school children and academic performance variables orbehavioral problems.

  13. Academic Achievement in Early Adolescence: The Influence of Cognitive and Non-Cognitive Variables.

    Science.gov (United States)

    Veas, Alejandro; Castejón, Juan-Luis; Gilar, Raquel; Miñano, Pablo

    2015-01-01

    The present study examined the predictive effects of intellectual ability, self-concept, goal orientations, learning strategies, popularity and parent involvement on academic achievement. Hierarchical regression analysis and path analysis were performed among a sample of 1398 high school students (mean age = 12.5; SD =.67) from eight education centers from the province of Alicante (Spain). Cognitive and non-cognitive variables were measured using validated questionnaires, whereas academic achievement was assessed using end-of-term grades obtained by students in nine subjects. The results revealed significant predictive effects of all of the variables. The model proposed had a satisfactory fit, and all of the hypothesized relationships were significant. These findings support the importance of including non-cognitive variables along with cognitive variables when predicting a model of academic achievement.

  14. Resilience influence, goals and social context in the academic achievement of high school students

    Directory of Open Access Journals (Sweden)

    José Concepción Gaxiola Romero

    2012-05-01

    Full Text Available The academic achievement in high school students of Mexico, according to national and international evaluations has been insufficient. In spite of this situation, is possible to find excellent students, even in the context of sharing negative contextual and physical conditions. There are few investigations that describe the variables associated to resilient students. The alumni that are beyond the risks are called resilient (Rutter, 2007. The aim of this research was to explore and identify the internal variables: goals and resilience, and the external variables: risky neighborhood and risky friends that predicted the scholar achievement of high school students. To measure those variables, was used a compilation of scales validated in the region. The data were analyzed using structural equation modeling, and show that resilience predicted indirectly the scholar achievement trough the academic goals. The results could be used in programs to improve the academic achievement of this group of students.

  15. Generational Influences in Academic Emergency Medicine: Teaching and Learning, Mentoring, and Technology (Part I)

    Science.gov (United States)

    Mohr, Nicholas M.; Moreno-Walton, Lisa; Mills, Angela M.; Brunett, Patrick H.; Promes, Susan B.

    2010-01-01

    For the first time in history, four generations are working together – Traditionalists, Baby Boomers, Generation Xers, and Millennials. Members of each generation carry with them a unique perspective of the world and interact differently with those around them. Through a review of the literature and consensus by modified Delphi methodology of the Society for Academic Emergency Medicine (SAEM) Aging and Generational Issues Task Force, the authors have developed this two-part series to address generational issues present in academic emergency medicine (EM). Understanding generational characteristics and mitigating strategies can help address some common issues encountered in academic EM. Through recognition of the unique characteristics of each of the generations with respect to teaching and learning, mentoring, and technology, academicians have the opportunity to strategically optimize interactions with one another. PMID:21314779

  16. Charge injection and accumulation in organic light-emitting diode with PEDOT:PSS anode

    Science.gov (United States)

    Weis, Martin; Otsuka, Takako; Taguchi, Dai; Manaka, Takaaki; Iwamoto, Mitsumasa

    2015-04-01

    Organic light-emitting diode (OLED) displays using flexible substrates have many attractive features. Since transparent conductive oxides do not fit the requirements of flexible devices, conductive polymer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has been proposed as an alternative. The charge injection and accumulation in OLED devices with PEDOT:PSS anodes are investigated and compared with indium tin oxide anode devices. Higher current density and electroluminescence light intensity are achieved for the OLED device with a PEDOT:PSS anode. The electric field induced second-harmonic generation technique is used for direct observation of temporal evolution of electric fields. It is clearly demonstrated that the improvement in the device performance of the OLED device with a PEDOT:PSS anode is associated with the smooth charge injection and accumulation.

  17. Nonvolatile write-once-read-many-times memory device with functionalized-nanoshells/PEDOT:PSS nanocomposites

    Energy Technology Data Exchange (ETDEWEB)

    Avila-Nino, J.A.; Segura-Cardenas, E. [Universidad Autonoma de San Luis Potosi, Instituto de Investigacion en Comunicacion Optica, Alvaro Obregon 64 Zona Centro, 78000 SLP (Mexico); Sustaita, A.O. [Instituto Potosino de Investigacion Cientifica y Tecnologica, Camino a la presa San Jose 2055, CP 78216, San Luis Potosi (Mexico); Cruz-Cruz, I. [Universidad Autonoma de San Luis Potosi, Instituto de Investigacion en Comunicacion Optica, Alvaro Obregon 64 Zona Centro, 78000 SLP (Mexico); Lopez-Sandoval, R. [Instituto Potosino de Investigacion Cientifica y Tecnologica, Camino a la presa San Jose 2055, CP 78216, San Luis Potosi (Mexico); Reyes-Reyes, M., E-mail: reyesm@iico.uaslp.mx [Universidad Autonoma de San Luis Potosi, Instituto de Investigacion en Comunicacion Optica, Alvaro Obregon 64 Zona Centro, 78000 SLP (Mexico)

    2011-03-25

    We have investigated the memory effect of the nanocomposites of functionalized carbon nanoshells (f-CNSs) mixed with poly(3,4-ethylenedioxythiophene) doped with polystyrenesulfonate (PEDOT:PSS) polymer. The f-CNSs were synthesized by the spray pyrolysis method and functionalized in situ with functional groups (OH, COOH, C-H, C-OH) with the aim of improving their compatibility in the aqueous dispersion of PEDOT:PSS. The current-voltage (I-V) sweep curves at room temperature for the Al/f-CNSs, for certain concentrations range, embedded in a PEDOT:PSS layer/Al devices showed electrical bistability for write-once-read-many-times (WORM) memory devices. The memory effect observed in the devices can be explained due to the existence of trapped charges in the f-CNSs/PEDOT:PSS layer. The carrier transport mechanisms for the memory devices is studied and discussed.

  18. Self-Esteem and Academic Success as Influenced by Reading Strategies

    Science.gov (United States)

    Zarei, Eghbal; Shokrpour, Nasrin; Nasiri, Elham; Kafipour, Reza

    2012-01-01

    This study aimed at determining the effect of instruction in cognitive and metacognitive strategies on the students' educational self-esteem and academic performance. 87 students were selected through random sampling. The two first groups were consciously taught about cognitive and metacognitive strategies. All the classes were taught by the same…

  19. How Do Interaction Experiences Influence Doctoral Students' Academic Pursuits in Biomedical Research?

    Science.gov (United States)

    Kong, Xiaoqing; Chakraverty, Devasmita; Jeffe, Donna B.; Andriole, Dorothy A.; Wathington, Heather D.; Tai, Robert H.

    2013-01-01

    This exploratory qualitative study investigated how doctoral students reported their personal and professional interaction experiences that they believed might facilitate or impede their academic pursuits in biomedical research. We collected 19 in-depth interviews with doctoral students in biomedical research from eight universities, and we based…

  20. The Influence of High School Academics on Freshman College Mathematics and Science Courses at SUNY Oswego

    Science.gov (United States)

    Hayali, Tolga

    2013-01-01

    This study examined the relationship between 2011 freshman college mathematics and science grades and freshman students' high school academics and demographic data, exploring the factors that contribute to the success of first-year STEM majoring freshman students at State University of New York at Oswego. The variables were Gender, Race, SES,…

  1. The Influence of Parental Background on Students' Academic Performance in Physics in WASSCS 2000-2005

    Science.gov (United States)

    Ebong, Samuel T.

    2015-01-01

    The study investigated parental background on student's academic performance in secondary schools in Abak local government, Akwa Ibom State, Nigeria. A survey design was adopted for the study. One thousand four hundred and forty (1440) senior secondary three (SS3) Physics students were drawn by simple random sampling from 12 Schools, six (6) each…

  2. PHYSICAL AND SPORT ACTIVATION: IT’S INFLUENCE ON THE ACADEMIC PERFORMANCE

    National Research Council Canada - National Science Library

    José Alfredo Balderrama-Ruedas; Pedro José Díaz-Domínguez; Rosa Isela Gómez-Castillo

    2015-01-01

    ...), whose performed work out and sports among the four years in the bachelor´s degree in education, so on the entry test to the teaching service and analyze the relationship between work out and the sports with academic performance...

  3. How Multiple Actors and Contexts Influence the Implementation of an International Academic Partnership: A Case Study

    Science.gov (United States)

    Gieser, James D.

    2013-01-01

    The effects of globalization enable institutions of higher education to share knowledge, resources, and programs across national borders like never before. In this environment, many universities hope to become more globally active and interconnected through various international strategies, such as the international academic partnership. Yet…

  4. Cognitive Style and Creative Quality: Influence on Academic Achievement of University Students in Indonesia

    Directory of Open Access Journals (Sweden)

    Nurul Huda Wulandari

    2016-07-01

    Full Text Available Reasoning is a process to solve the problem. This process needs cognitive functions in thinking, learning, and making decision. Cognitive style is a term to explain human natural preferences in gathering and processing information. Humans appears to reason using two cognitive processing styles; the first system is called as intuitive thinking style that is spontaneous, effortless, and without conscious search, whereas the second system is called as reflective or analytical thinking that works in a deliberate, analytical, procedural, and controllable process. In human context, sometimes people encounter difficult problem or unknown situation that have to be coped by ideas that are both novel and adaptive to the task constraints. People who solve the problem successfully are called creative. Creativity is the base to enhance competitiveness among students that might result in good academic performance. The present study examined cognitive style and creative quality in affecting academic achievement of university students in Indonesia. The result showed that students who used analytical thinking tended to have higher academic success, especially in life science majors. Moreover, it was found that students would need to materialize their creative potential to reach greater academic achievement in demanding classes; for instance, the final year of undergraduate program.

  5. Script towards Research 2.0: The Influence of Digital and Online Tools in Academic Research

    Science.gov (United States)

    Grosseck, Gabriela; Bran, Ramona

    2016-01-01

    The new Internet technologies have infiltrated in a stunning way the academic environment, both at individual and at institutional level. Therefore, more and more teachers have started educational blogs, librarians are active on Twitter, other educational actors curate web content, students post on Instagram or Flickr, and university departments…

  6. The Influence of Classroom Drama on English Learners' Academic Language Use during English Language Arts Lessons

    Science.gov (United States)

    Anderson, Alida; Loughlin, Sandra M.

    2014-01-01

    Teacher and student academic discourse was examined in an urban arts-integrated school to better understand facilitation of students' English language learning. Participants' discourse was compared across English language arts (ELA) lessons with and without classroom drama in a third-grade classroom of English learning (EL) students (N = 18) with…

  7. The Influence of Academic Migration on the Intellectual Potential of Russia

    Science.gov (United States)

    Latova, Natalia V.; Savinkov, Vladimir I.

    2012-01-01

    The emigration of highly-qualified academics ("brain drain") is considered an essential factor in the decline of the human capital of post-Soviet Russia. However, statistics show that the scale of this phenomenon since 2000 was minor. The Russian scientists who went abroad for permanent residence or for a contract job abroad represented…

  8. Factors influencing academic success or failure of first-year and ...

    African Journals Online (AJOL)

    Erna Kinsey

    They were: "Effective written communications skills". (ranked 14th by lecturers and 41st by first-year students), "The reason for doing a specific course" (ranked 20th and 45th), "Ability to handle stress" (ranked 38th and 16th)"An appropriate balance between academic commitments and social life" (ranked 41st and 18th), and.

  9. Parenting Styles Influence on Locus of Control, Self-Efficacy and Academic Adjustment in College Students

    Science.gov (United States)

    Mills, Kimberly Tracey

    2010-01-01

    The purpose of this study was to investigate the relationship between perceived parenting style, locus of control, self-efficacy, and student outcome (i.e. academic performance, GPA) in a sample of college students. The relationship among gender and ethnicity were also examined across these variables. There were 100 participants in this study,…

  10. Emotional Design in Multimedia: Does Gender and Academic Achievement Influence Learning Outcomes?

    Science.gov (United States)

    Kumar, Jeya Amantha; Muniandy, Balakrishnan; Yahaya, Wan Ahmad Jaafar Wan

    2016-01-01

    This study was designed as a preliminary study (N = 33) to explore the effects of gender and academic achievement (Cumulative Grade Point Average-CGPA) on polytechnic students' learning outcomes when exposed to Multimedia Learning Environments (MLE) designed to induce emotions. Three designs namely positive (PosD), neutral (NeuD) and negative…

  11. Peer Influences on Academic Motivation: Exploring Multiple Methods of Assessing Youths' Most "Influential" Peer Relationships

    Science.gov (United States)

    Molloy, Lauren E.; Gest, Scott D.; Rulison, Kelly L.

    2011-01-01

    The present study examines the relative role of three distinct types of peer relationships (reciprocated friendships, frequent interactions, and shared group membership) in within-year changes in academic self-concept and engagement before and after the transition to middle school (fifth and seventh grade). In a series of linear regression…

  12. The Relative Influence of Values and Identities on Academic Dishonesty: A Quantitative Analysis

    Science.gov (United States)

    Morris, R. C.

    2012-01-01

    Within sociological-social psychology values are an emerging topic of substantive interest. Building on identity theory this study tests the relative salience of values versus role-identities as a predictor of a student's participation in academic dishonesty. This study finds that for a general population of students values are a significant…

  13. Parental Influences on the Academic Motivation of Gifted Students: A Self-Determination Theory Perspective

    Science.gov (United States)

    Garn, Alex C.; Matthews, Michael S.; Jolly, Jennifer L.

    2010-01-01

    The home environment that parents provide their gifted children can have a significant impact on academic motivation, yet limited research has focused on this topic. Self-determination theory, a comprehensive framework of motivation, was used in the current study to explore two research questions: (a) What attitudes do parents of gifted students…

  14. Internationalization within Higher Education and Its Influence on Faculty: Experiences of Turkish Academic Staff

    Science.gov (United States)

    Bedenlier, Svenja

    2017-01-01

    In this article, findings are reported from a phenomenology-oriented study on prolonged international mobility and the effects of internationalization on the professional lives of six academic faculty at a Turkish research university. Drawing on research on international mobility of faculty and the present context of Turkish higher education, this…

  15. Who am I? Key influences on the formation of academic identity within a faculty development program.

    Science.gov (United States)

    Lieff, Susan; Baker, Lindsay; Mori, Brenda; Egan-Lee, Eileen; Chin, Kevin; Reeves, Scott

    2012-01-01

    Professional identity encompasses how individuals understand themselves, interpret experiences, present themselves, wish to be perceived, and are recognized by the broader professional community. For health professional and health science educators, their 'academic' professional identity is situated within their academic community and plays an integral role in their well being and productivity. This study aims to explore factors that contribute to the formation and growth of academic identity (AI) within the context of a longitudinal faculty development program. Using a qualitative case study approach, data from three cohorts of a 2-year faculty development program were explored and analyzed for emerging issues and themes related to AI. Factors salient to the formation of AI were grouped into three major domains: personal (cognitive and emotional factors unique to each individual); relational (connections and interactions with others); and contextual (the program itself and external work environments). Faculty development initiatives not only aim to develop knowledge, skills, and attitudes, but also contribute to the formation of academic identities in a number of different ways. Facilitating the growth of AI has the potential to increase faculty motivation, satisfaction, and productivity. Faculty developers need to be mindful of factors within the personal, relational, and contextual domains when considering issues of program design and implementation.

  16. From moral to legal judgment : the influence of normative context in lawyers and other academics

    NARCIS (Netherlands)

    Schleim, Stephan; Spranger, Tade M.; Erk, Susanne; Walter, Henrik

    Various kinds of normative judgments are an integral part of everyday life. We extended the scrutiny of social cognitive neuroscience into the domain of legal decisions, investigating two groups, lawyers and other academics, during moral and legal decision-making. While we found activation of brain

  17. Knowledge Sharing Among Malaysian Academics: Influence of Affective Commitment and Trust

    National Research Council Canada - National Science Library

    See Kwong Goh; Manjit Singh Sandhu

    2013-01-01

    ... sharing in public universities differs from private universities. The research model includes the theory of planned behaviour (TPB) and the two affective components. In order to examine the research model, a survey was conducted with a total respondent of 545 academics from 30 universities in Malaysia. Multiple linear regression was used to examine the ...

  18. Measurement of Perceived Parenting Style Influence on Academic Achievement among Saudi College Students

    Science.gov (United States)

    Alanizi, Faris Mayoof Mokheimer

    2010-01-01

    The purpose of this study was to examine the relation between academic achievement and parenting styles among Saudi college students. The participants in this study consisted of 349 male and 219 female college students, whose age ranged from 18-25 years. The instruments for the current study were: (a) an Arabic translation of the Revised Parental…

  19. The Influence of Social Networking Sites on High School Students' Social and Academic Development

    Science.gov (United States)

    Ahn, June

    2010-01-01

    This dissertation examines the effects of social network sites on youth social and academic development. First, I provide a critical analysis of the extant research literature surrounding social network sites and youth. I merge scholarly thought in the areas of Internet studies, digital divides, social capital theory, psychological well-being,…

  20. Important Learning Dimensions Influencing Undergraduate Students' Learning and Academic Achievement in Higher Education

    Science.gov (United States)

    Usun, Salih

    2004-01-01

    The main aim of this study was to determine the opinions of the undergraduate students and faculty members on factors that affect student learning and academic achievement. The sub aims of this study were to: (1) Develop a mean rank ordering of the 23 dimensions affecting learning, for both the students and faculty, and determine the similarities…

  1. Demographic and Educational Influences on Academic Motivation, Competence, and Achievement in Minority Urban Students.

    Science.gov (United States)

    Marcon, Rebecca A.

    Using the Scale of Intrinsic versus Extrinsic Orientation in the Classroom (S. Harter, 1980) and the Self-Perception Profile for Children (S. Harter, 1985), this study of 222 urban early adolescents (median age=149 months) examined differences in motivation that might affect academic achievement and perceptions of competence. Socioeconomic status…

  2. Motivational Factors Influencing the Academic Achievement of Adolescent African American Males

    Science.gov (United States)

    Lamb, Mary Lisa

    2010-01-01

    This phenomenological study investigated the nuances of understanding motivational factors with respect to the problem of academic underachievement among African American males (AAM). This research is compelling because AAM still under perform as they progress through the educational system despite more than a decade of interventions targeting the…

  3. Potential of PEDOT:PSS as a hole selective front contact for silicon heterojunction solar cells.

    Science.gov (United States)

    Jäckle, Sara; Liebhaber, Martin; Gersmann, Clemens; Mews, Mathias; Jäger, Klaus; Christiansen, Silke; Lips, Klaus

    2017-05-19

    We show that the highly conductive polymer poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) can successfully be applied as a hole selective front contact in silicon heterojunction (SHJ) solar cells. In combination with a superior electron selective heterojunction back contact based on amorphous silicon (a-Si), mono-crystalline n-type silicon (c-Si) solar cells reach power conversion efficiencies up to 14.8% and high open-circuit voltages exceeding 660 mV. Since in the PEDOT:PSS/c-Si/a-Si solar cell the inferior hybrid junction is determining the electrical device performance we are capable of assessing the recombination velocity (v I ) at the PEDOT:PSS/c-Si interface. An estimated v I of ~400 cm/s demonstrates, that while PEDOT:PSS shows an excellent selectivity on n-type c-Si, the passivation quality provided by the formation of a native oxide at the c-Si surface restricts the performance of the hybrid junction. Furthermore, by comparing the measured external quantum efficiency with optical simulations, we quantify the losses due to parasitic absorption of PEDOT:PSS and reflection of the device layer stack. By pointing out ways to better passivate the hybrid interface and to increase the photocurrent we discuss the full potential of PEDOT:PSS as a front contact in SHJ solar cells.

  4. Timing and Targeting of PSS Methods and Tools: An Empirical Study amongst Academic Contributors

    DEFF Research Database (Denmark)

    Nøhr Hinz, Hector; Bey, Niki; McAloone, Tim C.

    2013-01-01

    surveyed is when a given method is meant to be used in the development of a product/service-system. This aspect has been determined through a qualitative assessment of each method. The second aspect surveyed is which persons in an organisation who are seen as the main drivers in the use of the methods...

  5. Expectations and Influencing Factors of IS Graduates and Education in Thailand: A Perspective of the Students, Academics and Business Community

    Directory of Open Access Journals (Sweden)

    Teay Shawyun Ph.D.

    1999-01-01

    Full Text Available As academic we have always been entrusted with developing the knowledge, skills, and capability of our IS students. In the strive for excellence in education, there is always the question of what has been implemented is appropriate and finally achieves its ultimate goals of delivering quality, capable and intellectual students as workforce for the business. To this end, this exploratory research tries to discover what knowledge, skills and capability are expected of an IS graduate, the facilities expected to develop these qualities and what influencing factors make the students go for an IS education. The research will be based on the perspectives of the student, academic and business community. The major findings highlight the overall tendency of higher mean expectation of the business community in most of the fundamental expectations of the type of knowledge, skills and capability and the facilities essential to the development of these attributes. The academics are normally supportive of the business community’s perspectives except in the dimensions of skill expectation and attitudinal factors. Overall, it also appears that the students show a lower average means on most attributes as compared to the academics and business community. Based on this research, there appears to be distinctive expectations of an IS graduate. Based on the balanced technology approach of looking at the development of the IS graduate from degree of sophistication of the Technoware (T, Humaware (H, Inforware (I and Orgaware (O, it is hoped that the following can be achieved: 1. A newly revised and revamped IS curriculum, 2. A linkage of the THIO to develop the IS graduate and 3. A linkage of the academia-industry THIO linkage to develop the IS graduate.

  6. PEDOT:PSS organic electrochemical transistor arrays for extracellular electrophysiological sensing of cardiac cells.

    Science.gov (United States)

    Hempel, Felix; Law, Jessica Ka-Yan; Nguyen, Thanh Chien; Munief, Walid; Lu, Xiaoling; Pachauri, Vivek; Susloparova, Anna; Vu, Xuan Thang; Ingebrandt, Sven

    2017-07-15

    Electrophysiological biosensors embedded in planar devices represent a state of the art approach to measure and evaluate the electrical activity of biological systems. This measurement method allows for the testing of drugs and their influences on cells or tissues, cytotoxicity, as well as the direct implementation into biological systems in vivo for signal transduction. Multi-electrode arrays (MEAs) with metal or metal-like electrodes on glass substrates are one of the most common, well-established platforms for this purpose. In recent years organic electrochemical transistors (OECTs) made of poly(2,3-dihydrothieno-1,4-dioxin)-poly(styrenesulfonate) (PEDOT:PSS) have as well shown their value in transducing and amplifying the ionic signals in biological systems. We developed OECT devices in a wafer-scale process and used them as electrophysiological biosensors measuring electrophysiological activity of the cardiac cell line HL-1. Our optimized devices show very promising properties such as good signal-to-noise ratio as well as the ability to record fast components of extracellular signals. Combined with an easy, cost effective fabrication and the transparency of the polymer, this platform offers a valuable alternative to traditional MEA systems for future cell sensing applications. Copyright © 2016 Elsevier B.V. All rights reserved.

  7. From Parents to Peers: Trajectories in Sources of Academic Influence Grades 4 to 8

    Science.gov (United States)

    Sorensen, Lucy C.; Cook, Philip J.; Dodge, Kenneth A.

    2017-01-01

    Prior research and anecdotal evidence from educators suggest that classroom peers play a meaningful role in how students learn. However, the literature has failed to consider the dynamic and context-dependent nature of classroom peer influence. Developmental psychology theories suggest that peer influence will increase and family influence will…

  8. Influence of sleep disturbance, fatigue, vitality on oral health and academic performance in indian dental students.

    Science.gov (United States)

    Asawa, Kailash; Sen, Nandini; Bhat, Nagesh; Tak, Mridula; Sultane, Pratibha; Mandal, Aritra

    2017-01-01

    Oral health and academic performance are important contributing factors for a student's professional life. Countless factors affect both, among which sleep, vitality and fatigue are less explored areas that also have a strong impact. The objective of the study was to assess the association of sleep disturbances, fatigue and vitality with self reported oral health status, oral hygiene habits and academic performance of dental students of Udaipur. A descriptive cross-sectional study was conducted among undergraduate and postgraduate dental students of Udaipur. Self-administered structured questionnaire was used to assess the psychological factors, vitality, sleep quality, fatigue, self reported oral health status, habits and academic performance. Analysis of variance and stepwise multiple linear regression were utilized for statistical analysis with 95% confidence level and 5% level of significance. Of the 230 participants, 180 (78.3%) were undergraduates and 50 (21.7%) were postgraduates. Among them, females showed higher scores in disturbed sleep index (2.69±2.14) as compared to males (2.45±1.91). Respondents who had "Poor" dental health, scored more in disturbed sleep index (3.15±1.64) and fatigue scale (20.00±4.88). Subjects who flossed "everyday", were found to have good sleep and more energy (p=0.01) and those who assessed themselves as excellent students scored more in the Vitality Scale (p=0.01) and less in the Sleep index (p=0.01). The present study confirms that disturbed sleep, aliveness and fatigue, all are interlinked with each other and are imperative factors having the potential to alter the oral health status, habits and academics of dental students.

  9. The Influence of the ADHD Label on Teacher’s Expectations of Academic Achievement

    OpenAIRE

    Metzger, Ashley

    2016-01-01

    While education scholars have discussed differing perceptions of students’ academic skills by race, little is known about differences in perceptions due to developmental disabilities. Using data from the Early Childhood Longitudinal Study, First Grade Waves, this study pushes forward what is already known about teacher perceptions by exploring whether a diagnosis of ADHD leads to differing teacher evaluations in science, math, and reading. Results do indicate that teachers are more likely to ...

  10. Influence of sleep disturbance, fatigue, vitality on oral health and academic performance in indian dental students

    Science.gov (United States)

    ASAWA, KAILASH; SEN, NANDINI; BHAT, NAGESH; TAK, MRIDULA; SULTANE, PRATIBHA; MANDAL, ARITRA

    2017-01-01

    Background Oral health and academic performance are important contributing factors for a student’s professional life. Countless factors affect both, among which sleep, vitality and fatigue are less explored areas that also have a strong impact. Objective The objective of the study was to assess the association of sleep disturbances, fatigue and vitality with self reported oral health status, oral hygiene habits and academic performance of dental students of Udaipur. Methods A descriptive cross-sectional study was conducted among undergraduate and postgraduate dental students of Udaipur. Self-administered structured questionnaire was used to assess the psychological factors, vitality, sleep quality, fatigue, self reported oral health status, habits and academic performance. Analysis of variance and stepwise multiple linear regression were utilized for statistical analysis with 95% confidence level and 5% level of significance. Results Of the 230 participants, 180 (78.3%) were undergraduates and 50 (21.7%) were postgraduates. Among them, females showed higher scores in disturbed sleep index (2.69±2.14) as compared to males (2.45±1.91). Respondents who had “Poor” dental health, scored more in disturbed sleep index (3.15±1.64) and fatigue scale (20.00±4.88). Subjects who flossed “everyday”, were found to have good sleep and more energy (p=0.01) and those who assessed themselves as excellent students scored more in the Vitality Scale (p=0.01) and less in the Sleep index (p=0.01). Conclusion The present study confirms that disturbed sleep, aliveness and fatigue, all are interlinked with each other and are imperative factors having the potential to alter the oral health status, habits and academics of dental students. PMID:28781530

  11. Emotional Design in Multimedia: Does Gender and Academic Achievement Influence Learning Outcomes?

    OpenAIRE

    Jeya Amantha Kumar; BalakrishnanMuniandy; Wan Ahmad Jaafar Wan Yahaya

    2016-01-01

    This study was designed as a preliminary study (N = 33) to explore the effects of gender and academic achievement (Cumulative Grade Point Average-CGPA) on polytechnic students’ learning outcomes when exposed to Multimedia Learning Environments (MLE) designed to induce emotions. Three designs namely positive (PosD), neutral (NeuD) and negative (NegD) had similar contents and narrations but differed visually based on colors, images and font (size and style) in depicting the intended emotions. T...

  12. Academic Stress Influences Periodontal Health Condition and Interleukin-1 beta Level

    OpenAIRE

    Sandra O. Kuswandani; Sri LC Masulili; Nurtami Soedarsono; Yulianti Kemal

    2014-01-01

    Stress is a risk factor for periodontal disease, causing increase levels of interleukin-1 beta that involve in periodontal destruction. Objective: To analyze the relationship between academic stress in residency program students conditions and levels of interleukin-1 beta in gingival crevicular fluid. Methods: Thirty eight subjects filled the questionnaire of Graduate Dental Environtmental Stress (GDES), periodontal examination and samples of gingival crevicular fluid were tested for interleu...

  13. Family climate influences. Learning strategies and emotional intelligence in the academic performance

    OpenAIRE

    Sotil Brioso, Amparo; Facultad de Psicología, Universidad Nacional Mayor de San Marcos, Lima, Perú; Quintana Peña, Alberto; Facultad de Psicología, Universidad Nacional Mayor de San Marcos, Lima, Perú

    2014-01-01

    The present work has as purpose to make an empiric study of the contribution of the combined effects of the family climate, the learning strategies and the emotional intelligence on the academic yield investigation carried out in a sample of 250 students of the Ability of Psychology of the National University bigger than San Marcos. Finding as a result that, as for the Family Climate the hall and balanced range families prevail, while regarding the emotional intelligence, an emotional capacit...

  14. The Influence of the Academic Conservation Biology Literature on Endangered Species Recovery Planning

    Directory of Open Access Journals (Sweden)

    John Stinchcombe

    2002-12-01

    Full Text Available Despite the volume of the academic conservation biology literature, there is little evidence as to what effect this work is having on endangered species recovery efforts. Using data collected from a national review of 136 endangered and threatened species recovery plans, we evaluated whether recovery plans were changing in response to publication trends in four areas of the academic conservation biology literature: metapopulation dynamics, population viability analysis, conservation corridors, and conservation genetics. We detected several changes in recovery plans in apparent response to publication trends in these areas (e.g., the number of tasks designed to promote the recovery of an endangered species shifted, although these tasks were rarely assigned a high priority. Our results indicate that, although the content of endangered species recovery plans changes in response to the literature, results are not uniform across all topics. We suggest that academic conservation biologists need to address the relative importance of each topic for conservation practice in different settings. [See Erratum

  15. Multiscale study of the formation of the PFI:PSS:PEDOT super structure and its HOMO-LUMO energies

    Science.gov (United States)

    Huang, Min

    2017-08-01

    The vertically self-organized concentration profile of the PSS:PEDOT:PFI layer from mesoscale DPD simulations presented in the previous contribution were inversely mapped back into atomistic scale. DFT quantum calculations were then performed to understand the nature of the formation of the PFI:PSS:PEDOT complex. Hydrogen bond bonding energy and deprotonation energy were obtained accordingly. The charge states of PSS polymer chain in this complex and its effects on the HOMO-LUMO (the work function) were discussed. The DFT quantum calculation revealed the formation of complex hydrogen bonding networks leading to the formation of super PFI:PSS:PEDOT structure. PFI was found to be a stronger H donor than PSS. The adding of PFI was found to have the effect of lowering the energy of PSS chain, as the result the HOMO of the PFI:PSS:PEDOT ternary structure was found to be -5.35 eV, lower than the original PSS:PEDOT binary structure. The increasing of the work function from the bottom to the top of the film can therefore be understood as the result of the combining effects of increasing PSS:PEDOT and PFI:PSS ratio in the vertical direction induced by PFI led phase segregation.

  16. PssP2 is a polysaccharide co-polymerase involved in exopolysaccharide chain-length determination in Rhizobium leguminosarum.

    Directory of Open Access Journals (Sweden)

    Małgorzata Marczak

    Full Text Available Production of extracellular polysaccharides is a complex process engaging proteins localized in different subcellular compartments, yet communicating with each other or even directly interacting in multicomponent complexes. Proteins involved in polymerization and transport of exopolysaccharide (EPS in Rhizobium leguminosarum are encoded within the chromosomal Pss-I cluster. However, genes implicated in polysaccharide synthesis are common in rhizobia, with several homologues of pss genes identified in other regions of the R. leguminosarum genome. One such region is chromosomally located Pss-II encoding proteins homologous to known components of the Wzx/Wzy-dependent polysaccharide synthesis and transport systems. The pssP2 gene encodes a protein similar to polysaccharide co-polymerases involved in determination of the length of polysaccharide chains in capsule and O-antigen biosynthesis. In this work, a mutant with a disrupted pssP2 gene was constructed and its capabilities to produce EPS and enter into a symbiotic relationship with clover were studied. The pssP2 mutant, while not altered in lipopolysaccharide (LPS, displayed changes in molecular mass distribution profile of EPS. Lack of the full-length PssP2 protein resulted in a reduction of high molecular weight EPS, yet polymerized to a longer length than in the RtTA1 wild type. The mutant strain was also more efficient in symbiotic performance. The functional interrelation between PssP2 and proteins encoded within the Pss-I region was further supported by data from bacterial two-hybrid assays providing evidence for PssP2 interactions with PssT polymerase, as well as glycosyltransferase PssC. A possible role for PssP2 in a complex involved in EPS chain-length determination is discussed.

  17. Binary Logistic Regression Analysis in Assessment and Identifying Factors That Influence Students' Academic Achievement: The Case of College of Natural and Computational Science, Wolaita Sodo University, Ethiopia

    Science.gov (United States)

    Zewude, Bereket Tessema; Ashine, Kidus Meskele

    2016-01-01

    An attempt has been made to assess and identify the major variables that influence student academic achievement at college of natural and computational science of Wolaita Sodo University in Ethiopia. Study time, peer influence, securing first choice of department, arranging study time outside class, amount of money received from family, good life…

  18. Cross-Talk Immunity of PEDOT:PSS Pressure Sensing Arrays with Gold Nanoparticle Incorporation.

    Science.gov (United States)

    Karmakar, Rajat Subhra; Lu, Yu-Jen; Fu, Yi; Wei, Kuo-Chen; Chan, Shun-Hsiang; Wu, Ming-Chung; Lee, Jyh-Wei; Lin, Tzu-Kang; Wang, Jer-Chyi

    2017-09-25

    In this study, the cross-talk effects and the basic piezoresistive characteristics of gold nanoparticle (Au-NP) incorporated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) pressure sensing 2 × 2 arrays are investigated using a cross-point electrode (CPE) structure. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) mappings were carried out to confirm the incorporation of Au-NPs in the PEDOT:PSS films. A solution mixing process was employed to incorporate the nanoparticles. When the diameter of the Au-NPs incorporated in the PEDOT:PSS films (Au-NPs/PEDOT:PSS) was 20 nm, the piezoresistive pressure sensing 2 × 2 arrays were almost immune to cross-talk effects, which enhances the pressure sensing accuracy of the array. The Au-NPs render the PEDOT:PSS films more resilient. This is confirmed by the high plastic resistance values using a nanoindenter, which reduce the interference between the active and passive cells. When the size of the Au-NPs is more than 20 nm, a significant cross-talk effect is observed in the pressure sensing arrays as a result of the high conductivity of the Au-NPs/PEDOT:PSS films with large Au-NPs. With the incorporation of optimally sized Au-NPs, the PEDOT:PSS piezoresistive pressure sensing arrays can be promising candidates for future high-resolution fingerprint identification system with multiple-electrode array structures.

  19. Influence of parenting style on the academic performance of middle school students

    OpenAIRE

    María José Domínguez; Montserrat Guasch

    2014-01-01

    Students who don't succeed in school are a persistent problem in our educational system. This fact shows that all the efforts to reduce this problem are not succeeding. One third of our students are left behind by the educational system; their results are discouraging. The measures to fight the academic failure are not working and that we have to put into practice new ways of analysis and treatment of this problem. This research explores the relationship between the way children perceive the ...

  20. Determinants of academic stress and stress-related selfmedication ...

    African Journals Online (AJOL)

    Methods: A cross-sectional survey was conducted among undergraduate students of pharmacy and medical colleges of the university. The study used Perceived Stress Scale (PSS) to document academic stress. The responses of the students were analyzed using SPSS version 22. Results: As many as 51.6 % of students' ...

  1. The Influence of Academic Values and Belongingness Concerns on Achievement Goals, Self-Efficacy, and Perceived Stress in First Quarter Freshmen: Relationships to Academic Performance and the Mediating Role of Procrastination

    Science.gov (United States)

    Kennedy, Gary J.

    2009-01-01

    This study assesses the influence of student values on long-term self-regulatory decisions defined in terms of a tendency to procrastinate and how these values, indirectly through procrastination, but also directly, affect important motivational, affective, social and behavioral academic outcomes of first quarter freshmen. Results of a structural…

  2. Students' Perceptions of Family Influences on their Academic Motivation: A Qualitative Analysis

    Science.gov (United States)

    Urdan, Tim; Solek, Monica; Schoenfelder, Erin

    2007-01-01

    Research examining family influences on student motivation and achievement in school has generally focused on parental influences and has often been limited to one or two variables (e.g., parental expectations or aspirations, parental involvement in schoolwork). In the present study we interviewed high school seniors to examine whether and how…

  3. Differential Influences of Family Processes for Scientifically Talented Individuals' Academic Achievement along Developmental Stages

    Science.gov (United States)

    Cho, Seokhee; Campbell, James Reed

    2011-01-01

    Differential influences of various family processes for students of science talent and students in general education from Grades 4 to 12 and Science Olympians in Korea were examined by administering Korean Inventory of Parental Influence. Korean Science Olympians were additionally interviewed about their family and school experiences. Family…

  4. Parent-Teacher-Student Discrepancies in Academic Ability Beliefs: Influences on Parent Involvement

    Science.gov (United States)

    Patel, Nimisha; Stevens, Sharon

    2010-01-01

    Most studies examining influences on parent involvement focus on common demographic factors, such as social class or gender, and on elementary grades. In the present study, we investigated a more malleable influence, perceptions of ability, in the context of middle school. We examined how perceptions held by parents, teachers, and students…

  5. Revisiting National Journalism Cultures in Post-Communist Countries: The Influence of Academic Scholarship

    Directory of Open Access Journals (Sweden)

    Halliki Harro-Loit

    2015-12-01

    Full Text Available The aim of this exploratory study is to develop the concept of the actor approach and journalism culture by adding a factor that has been more or less overlooked: academic scholarship. The paper also proposes to use the concept “discursive institutionalism” in order to clarify what knowledge and opinions about media are formed in the interaction of media institutions and academia with other institutions in society (e.g. educational, political and judicial. The concept “discursive institutionalism” includes the role of academia in providing new knowledge by conducting and disseminating research on the national and international levels, and this deserves greater attention. Although it is a common understanding that the role of academia is to prepare young professionals, it is less discussed how national media research and journalism education, in synergy, can create and maintain a collective understanding regarding the role and performance of national journalism in turbulent times. The paper is a meta-analysis of published research, and the empirical part of the study includes a close reading of academic articles, reports and conference presentations that are available in English about media in Central and Eastern European (CEE countries. Examples of research from selected CEE countries provide a descriptive view of problems and tendencies concerning media performance in these countries. The proposed analytical approach aims to connect these problems and provide ideas for further research.

  6. Academic and socio-demographic factors influencing students' performance in a new Saudi medical school.

    Science.gov (United States)

    Salem, Raneem O; Al-Mously, Najwa; Nabil, Nihal Mohamed; Al-Zalabani, Abdulmohsen H; Al-Dhawi, Abeer F; Al-Hamdan, Nasser

    2013-01-01

    The objective of this study is to examine factors such as the students' demographic data, motivation, educational factors and socio-cultural factors, and identify whether these factors affect the academic performance of undergraduate medical students. A cross-sectional study design utilising grade point averages (GPAs) of two cohorts of students in both levels of the pre-clinical phase. In addition, self-administered questionnaire was used to evaluate the effect of these factors on students with poor and good cumulative GPA. Academic performance was significantly affected with factors such as gender, marital status, interest and motivation, and the transportation used to reach the faculty. Students with a cumulative GPA of 3.0 or greater significantly differed than those with a GPA of less than 3.0 being higher in female students, in married students, students have interest to study medicine and type of transportation used to reach the college. Factors including age, motivation, learning resources, study time and type of transportation used have shown to create a significant difference in GPA between male and females. Factors such as age, gender, marital status, interest and motivation to enter medical school, learning resources, study time and the transportation used have been shown to significantly affect medical student's cumulative GPA as a whole batch as well as when they are tested for gender.

  7. The influence of parenting style on academic achievement and career path

    Science.gov (United States)

    ZAHED ZAHEDANI, ZAHRA; REZAEE, RITA; YAZDANI, ZAHRA; BAGHERI, SINA; NABEIEI, PARISA

    2016-01-01

    Introduction Several factors affect the academic performance of college students and parenting style is one significant factor. The current study has been done with the purpose of investigating the relationship between parenting styles, academic achievement and career path of students at Shiraz University of Medical Sciences.     Methods This is a correlation study carried out at Shiraz University of Medical Sciences. Among 1600 students, 310 students were selected randomly as the sample. Baumrind’s Parenting Style and Moqimi’s Career Path questionnaires were used and the obtained scores were correlated with the students' transcripts. To study the relation between variables Pearson correlation coefficient was used. Results There was a significant relationship between authoritarian parenting style and educational success (p=0.03). Also findings showed a significant relationship between firm parenting style and Career Path of the students, authoritarian parenting style and Career Path of the students, educational success and Career Path of the students (p=0.001). Conclusion Parents have an important role in identifying children’s talent and guiding them. Mutual understanding and close relationship between parents and children are recommended. Therefore, it is recommended that the methods of correct interaction of parents and children be more valued and parents familiarize their children with roles of businesses in society and the need for employment in legitimate businesses and this important affair should be more emphasized through mass media and family training classes. PMID:27382580

  8. The influence of parenting style on academic achievement and career path

    Directory of Open Access Journals (Sweden)

    ZAHRA ZAHED ZAHEDANI

    2016-07-01

    Full Text Available Introduction: Several factors affect the academic performance of college students and parenting style is one significant factor. The current study has been done with the purpose of investigating the relationship between parenting styles, academic achievement and career path of students at Shiraz University of Medical Sciences. Methods: This is a correlation study carried out at Shiraz University of Medical Sciences. Among 1600 students, 310 students were selected randomly as the sample. Baumrind’s Parenting Style and Moqimi’s Career Path questionnaires were used and the obtained scores were correlated with the students’ transcripts. To study the relation between variables Pearson correlation coefficient was used. Results: There was a significant relationship between authoritarian parenting style and educational success (p=0.03. Also findings showed a significant relationship between firm parenting style and Career Path of the students, authoritarian parenting style and Career Path of the students, educational success and Career Path of the students (p=0.001. Conclusion: Parents have an important role in identifying children’s talent and guiding them. Mutual understanding and close relationship between parents and children are recommended. Therefore, it is recommended that the methods of correct interaction of parents and children be more valued and parents familiarize their children with roles of businesses in society and the need for employment in legitimate businesses and this important affair should be more emphasized through mass media and family training classes.

  9. The influence of parenting style on academic achievement and career path.

    Science.gov (United States)

    Zahed Zahedani, Zahra; Rezaee, Rita; Yazdani, Zahra; Bagheri, Sina; Nabeiei, Parisa

    2016-07-01

    Several factors affect the academic performance of college students and parenting style is one significant factor. The current study has been done with the purpose of investigating the relationship between parenting styles, academic achievement and career path of students at Shiraz University of Medical Sciences. This is a correlation study carried out at Shiraz University of Medical Sciences. Among 1600 students, 310 students were selected randomly as the sample. Baumrind's Parenting Style and Moqimi's Career Path questionnaires were used and the obtained scores were correlated with the students' transcripts. To study the relation between variables Pearson correlation coefficient was used. There was a significant relationship between authoritarian parenting style and educational success (p=0.03). Also findings showed a significant relationship between firm parenting style and Career Path of the students, authoritarian parenting style and Career Path of the students, educational success and Career Path of the students (p=0.001). Parents have an important role in identifying children's talent and guiding them. Mutual understanding and close relationship between parents and children are recommended. Therefore, it is recommended that the methods of correct interaction of parents and children be more valued and parents familiarize their children with roles of businesses in society and the need for employment in legitimate businesses and this important affair should be more emphasized through mass media and family training classes.

  10. Emotional Design in Multimedia: Does Gender and Academic Achievement Influence Learning Outcomes?

    Directory of Open Access Journals (Sweden)

    Jeya Amantha Kumar

    2016-07-01

    Full Text Available This study was designed as a preliminary study (N = 33 to explore the effects of gender and academic achievement (Cumulative Grade Point Average-CGPA on polytechnic students’ learning outcomes when exposed to Multimedia Learning Environments (MLE designed to induce emotions. Three designs namely positive (PosD, neutral (NeuD and negative (NegD had similar contents and narrations but differed visually based on colors, images and font (size and style in depicting the intended emotions. The learning outcomes evaluated are learning achievement, perceived intrinsic motivation and satisfaction. Overall, there was no significant difference between gender and CGPA when students were exposed to the emotionally designed MLE. However, male students were significantly more motivated and satisfied with the NegD design compared to the female students. A significant positive relationship was observed between intrinsic motivation and satisfaction and between gender and design. In addition, female students were found to prefer PosD design and male students, NegD design. Users of PosD and NegD design showed strong relationship between perceived intrinsic motivation and satisfaction. For learning achievement, high academic achievers performed better in the PosD design compared to other designs. No significant relationships were found between any of the variables for the NeuD design.

  11. MORE THAN A LINGUISTIC REFERENCE: THE INFLUENCE OF CORPUS TECHNOLOGY ON L2 ACADEMIC WRITING

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    Hyunsook Yoon

    2008-06-01

    Full Text Available This paper reports on a qualitative study that investigated the changes in students’ writing process associated with corpus use over an extended period of time. The primary purpose of this study was to examine how corpus technology affects students’ development of competence as second language (L2 writers. The research was mainly based on case studies with six L2 writers in an English for Academic Purposes writing course. The findings revealed that corpus use not only had an immediate effect by helping the students solve immediate writing/language problems, but also promoted their perceptions of lexico-grammar and language awareness. Once the corpus approach was introduced to the writing process, the students assumed more responsibility for their writing and became more independent writers, and their confidence in writing increased. This studyidentified a wide variety of individual experiences and learning contexts that were involved in deciding the levels of the students’ willingness and success in using corpora. This paper also discusses the distinctive contributions of general corpora to English for Academic Purposes and the importance of lexical and grammatical aspects in L2 writing pedagogy.

  12. Effect of Secondary Doping Using Sorbitol on Structure and Transport Properties of PEDOT-PSS Thin Films

    Science.gov (United States)

    Khasim, Syed; Pasha, Apsar; Roy, Aashish S.; Parveen, Ameena; Badi, Nacer

    2017-07-01

    Poly(3,4-ethylene dioxythiophene):poly(styrenesulphonate) (PEDOT-PSS) in the recent past has emerged as one of the most fascinating conducting polymers for many device applications. The unique feature of PEDOT-PSS is its transparency in the entire visible spectrum with excellent thermal stability. The PEDOT-PSS as prepared as an aqueous dispersion has very low conductivity, and it hinders the performance of a device. In this work we report the conductivity enhancement of PEDOT-PSS thin films through secondary doping using a polar organic solvent such as sorbitol. The mechanism of conductivity enhancement was studied through various physical and chemical characterizations. The effect of sorbitol concentration on structure and transport properties of PEDOT-PSS thin films was investigated in detail. The structural and morphological modifications in PEDOT-PSS due to the addition of sorbitol was studied through Fourier transform spectroscopy, Ultra Violet-visible spectroscopy, theromogravimetric analysis, scanning electron microscopy and atomic force microscopy. The interactions resulting from conformational changes of PEDOT chains that changes from coiled to linear structure due to the sorbitol treatment significantly improves the conductivity of PEDOT-PSS films. The secondary doping of sorbitol reduces the energy barrier that facilitates the charge carrier hopping leading to enhanced conductivity. We have observed that the conductivity of PEDOT-PSS thin films was increased by two fold due to sorbitol treatment when compared to conductivity of pure PEDOT-PSS. We have carried out detailed analysis of dielectric parameters of sorbitol-treated PEDOT-PSS films and found that sorbitol treatment has a significant effect on various dielectric attributes of PEDOT-PSS films. Hence, secondary doping using sorbitol could be a useful way to effectively tailor the conductivity and dielectric properties of PEDOT-PSS thin films that can be used as flexible electrodes in

  13. Surface Plasmon Peak Resonance Discovered in Sulfuric Acid Treated PEDOT-PSS Conductive Polymers

    Science.gov (United States)

    Andahazy, Wil; Baber, Ashleigh; Constantin, Costel

    Poly(3,4-ethylenedioxythiophene) poly(4-styrenesulfonate) (PEDOT-PSS) is one of the most promising transparent conductors which has applications in flexible electronics including organic light emitting diodes (OLEDs), organic photovoltaics (OPVs), and organic field transistors (OFETs). Recently, scientists discovered that post-treatment with sulfuric acid of PEDOT-PSS thin films result in electrical conductivity increase and a UV absorption decrease due to the replacement of majority of PSS with sulfate ions (SO42-). However, the optical properties of the acid treated PEDOT-PSS thin films are not very well understood. In this project, PEDOT-PSS thin films were deposited by either drop casting or spin coating onto microscopic slides, and then submerged into sulfuric acid for 10 minutes. We performed optical spectroscopy by using a HS-190 variable angle spectroscopic ellipsometer with a wavelength range of 200-2500 nm, and for the electrical properties we used a homemade van der Pauw set up. Our preliminary dielectric constants measurements show the existence of a plasmon resonance peak (PRP) present at 1100 nm. We will discuss the correlation between the PRP position and film thickness.

  14. Low-Temperature Cross-Linking of PEDOT:PSS Films Using Divinylsulfone.

    Science.gov (United States)

    Mantione, Daniele; Del Agua, Isabel; Schaafsma, Wandert; ElMahmoudy, Mohammed; Uguz, Ilke; Sanchez-Sanchez, Ana; Sardon, Haritz; Castro, Begoña; Malliaras, George G; Mecerreyes, David

    2017-05-31

    Recent interest in bioelectronics has prompted the exploration of properties of conducting polymer films at the interface with biological milieus. Poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) from a commercially available source has been used as a model system for these studies. Different cross-linking schemes have been used to stabilize films of this material against delamination and redispersion, but the cost is a decrease in the electrical conductivity and/or additional heat treatment. Here we introduce divinylsulfone (DVS) as a new cross-linker for PEDOT:PSS. Thanks to the higher reactiveness of the vinyl groups of DVS, the cross-linking can be performed at room temperature. In addition, DVS does not reduce electronic conductivity of PEDOT:PSS but rather increases it by acting as a secondary dopant. Cell culture studies show that PEDOT:PSS:DVS films are cytocompatible and support neuroregeneration. As an example, we showed that this material improved the transconductance value and stability of an organic electrochemical transistor (OECT) device. These results open the way for the utilization of DVS as an effective cross-linker for PEDOT:PSS in bioelectronics applications.

  15. Validation of a Greek version of PSS-14; a global measure of perceived stress.

    Science.gov (United States)

    Katsarou, Alexia; Panagiotakos, Demosthenes; Zafeiropoulou, Aggeliki; Vryonis, Marios; Skoularigis, Ioannis; Tryposkiadis, Filippos; Papageorgiou, Charalabos

    2012-06-01

    To evaluate validity of the Greek version of a global measure of perceived stress PSS-14 (Perceived Stress Scale - 14 item). The original PSS-14 (theoretical range 0-56) was translated into Greek and then back-translated. One hundred men and women (39 +/- 10 years old, 40 men) participated in the validation process. Firstly, participants completed the Greek PSS-14 and, then they were interviewed by a psychologist specializing in stress management. Cronbach's alpha (a) evaluated internal consistency of the measurement, whereas Kendall's tau-b and Bland & Altman methods assessed consistency with the clinical evaluation. Exploratory and Confirmatory Factor analyses were conducted to reveal hidden factors within the data and to confirm the two-dimensional character of the scale. Mean (SD) PSS-14 score was 25(7.9). Strong internal consistency (Cronbach's alpha = 0.847) as well as moderate-to-good concordance between clinical assessment and PSS-14 (Kendall's tau-b = 0.43, p factors were extracted. Factor one explained 34.7% of variability and was heavily laden by positive items, and factor two that explained 10.6% of the variability by negative items. Confirmatory factor analysis revealed that the model with 2 factors had chi-square equal to 241.23 (p perceived stress in the Greek adult population living in urban areas; a finding that supports its local use in research settings as an evaluation tool measuring perceived stress, mainly as a risk factor but without diagnostic properties.

  16. Transfer students in STEM majors at a Midwestern University: Academic and social involvement factors that influence student success

    Science.gov (United States)

    Lopez, Carlos

    There is soon-to-be a shortage of qualified U.S. workers in science, technology, engineering, and mathematics (STEM). As a result, many science-related jobs are being filled by technically-skilled foreign workers. If the U.S wants to maintain its global economic leadership, then it must ensure a continuous growth of highly-trained individuals in STEM disciplines. Therefore, American institutions of higher education, including community colleges, must identify potential factors that contribute to the lack of interest in STEM majors, as well as the low rate of success of students who enter STEM majors but struggle to finish their degrees. The purpose of this study was to ascertain the perceptions of community college transfer students who are pursuing bachelor degrees in STEM majors at Iowa State University (ISU). What were their transfer experiences and what influenced their academic success in STEM. Participants were encouraged to share their transfer experiences while at the community college as well as their experiences on the ISU campus. They were also asked about their level of academic involvement, their relationships with faculty, and their participation in peer group activities prior to and after transferring. The research design included both quantitative and qualitative components, which provided an in-depth look at the experiences of STEM non-engineering and engineering students. Quantitative data include students' background characteristics, demographic information, and college activities at the community college and ISU. Qualitative data were used to illuminate students' overall transfer experience and their successful journey in STEM fields. The combination of quantitative and qualitative methods allowed a better understanding of the strategies students put into practice once they transfer from a community college to a four-year institution in pursuit of a STEM bachelor's degree. The results of this study suggest that there is an association among the

  17. Preparation of novel graphene-PEDOT:PSS nanocomposite films and fabrication of heterojunction diodes with n-Si

    Science.gov (United States)

    Pathak, C. S.; Singh, J. P.; Singh, R.

    2018-02-01

    In this paper, we report about the preparation of novel nanocomposite films based on graphene and poly (3,4 ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). It has been observed that the prepared nanocomposite material shows excellent electrical conductivity of 60 S/cm and highly transparent (>90%) in the visible region. The resistivity of graphene and PEDOT:PSS nanocomposite films decreases as temperature increases, which is a characteristic behavior of semiconductors. The conductivity of nanocomposite film is enhanced by two orders of magnitude as compared to pristine PEDOT:PSS film. Au/graphene-PEDOT:PSS nanocomposite/n-Si/In-Ga diodes are fabricated and it exhibited rectifying behavior.

  18. PHYSICAL AND SPORT ACTIVATION: IT’S INFLUENCE ON THE ACADEMIC PERFORMANCE

    Directory of Open Access Journals (Sweden)

    José Alfredo Balderrama-Ruedas

    2015-07-01

    Full Text Available This descriptive research is under the quantitative approach, the method analysis statistic is used, to show up the results obtained by the students from the Escuela Normal Rural Ricardo Flores Magón (ENRRFM, whose performed work out and sports among the four years in the bachelor´s degree in education, so on the entry test to the teaching service and analyze the relationship between work out and the sports with academic performance. The results found were the following: from the 96 students analyzed, an average of 21.87% performed work out and sport; this group got a higher average in the final results in comparison to the ones who did not and they got a qualified higher average in the entry test to the professional teaching service, however the difference did not show to mean significant according to the statistic used to analyze the data.

  19. From moral to legal judgment: the influence of normative context in lawyers and other academics

    Science.gov (United States)

    Spranger, Tade M.; Erk, Susanne; Walter, Henrik

    2011-01-01

    Various kinds of normative judgments are an integral part of everyday life. We extended the scrutiny of social cognitive neuroscience into the domain of legal decisions, investigating two groups, lawyers and other academics, during moral and legal decision-making. While we found activation of brain areas comprising the so-called ‘moral brain’ in both conditions, there was stronger activation in the left dorsolateral prefrontal cortex and middle temporal gyrus particularly when subjects made legal decisions, suggesting that these were made in respect to more explicit rules and demanded more complex semantic processing. Comparing both groups, our data show that behaviorally lawyers conceived themselves as emotionally less involved during normative decision-making in general. A group × condition interaction in the dorsal anterior cingulate cortex suggests a modulation of normative decision-making by attention based on subjects’ normative expertise. PMID:20194515

  20. Physicians' perceptions of institutional and leadership factors influencing their job satisfaction at one academic medical center.

    Science.gov (United States)

    Demmy, Todd L; Kivlahan, Coleen; Stone, Tamara T; Teague, Lynn; Sapienza, Pam

    2002-12-01

    Academic physicians' perceptions about their institution's function and leadership should provide insights toward improving faculty recruitment and retention. The authors surveyed 105 non-management and non-emeritus physicians who had been hired by (57%) or left (43%) the University of Missouri-Columbia School of Medicine (MUHC) in 1991-1998. The questionnaire measured both the importance and the availability of 14 institutional and leadership factors and the physicians' perceptions of satisfaction with their careers. Open-ended questions assessed additional concerns. In all, 56% of the overall satisfaction scores were unfavorable and, when grouped by faculty department, correlated inversely with departure rates (p =.04). Scores were surprisingly similar between those who left and those who remained at the institution. "Protected time for research or personal use" was the highest faculty priority regardless of level of overall satisfaction. "Equitable distribution of salary/resources" (p =.007) and "trust-communication with chair/division head" (p =.003) predicted good satisfaction independently. Openended responses for remaining at the university related to the pleasant local community (49%), intellectual issues (46%), and humanitarian issues (5%). Responses for considering opportunities elsewhere were administrative frustration (59%), income enhancement (18%), career advancement (9%), academic frustration (9%), and other (5%). Recommendations for enhancing recruitment and retention were fix administrative concerns (45%); improve research (20%), income (9%), physician support (9%), clinical programs (8%), and autonomy (5%); and other (4%). Surveying physicians who were recently hired or who have left an institution provides useful information to promote organizational changes that could improve physician retention.

  1. Assessment of learning styles of undergraduate medical students using the VARK questionnaire and the influence of sex and academic performance

    Science.gov (United States)

    Urval, Rathnakar P.; Ullal, Sheetal; Shenoy, Ashok K.; Shenoy, Nandita; Udupa, Laxminarayana A.

    2014-01-01

    While there are several tools to study learning styles of students, the visual-aural-read/write-kinesthetic (VARK) questionnaire is a simple, freely available, easy to administer tool that encourages students to describe their behavior in a manner they can identify with and accept. The aim is to understand the preferred sensory modality (or modalities) of students for learning. Teachers can use this knowledge to facilitate student learning. Moreover, students themselves can use this knowledge to change their learning habits. Five hundred undergraduate students belonging to two consecutive batches in their second year of undergraduate medical training were invited to participate in the exercise. Consenting students (415 students, 83%) were administered a printed form of version 7.0 of the VARK questionnaire. Besides the questionnaire, we also collected demographic data, academic performance data (marks obtained in 10th and 12th grades and last university examination), and self-perceived learning style preferences. The majority of students in our study had multiple learning preferences (68.7%). The predominant sensory modality of learning was aural (45.5%) and kinesthetic (33.1%). The learning style preference was not influenced by either sex or previous academic performance. Although we use a combination of teaching methods, there has not been an active effort to determine whether these adequately address the different types of learners. We hope these data will help us better our course contents and make learning a more fruitful experience. PMID:25179610

  2. Assessment of learning styles of undergraduate medical students using the VARK questionnaire and the influence of sex and academic performance.

    Science.gov (United States)

    Urval, Rathnakar P; Kamath, Ashwin; Ullal, Sheetal; Shenoy, Ashok K; Shenoy, Nandita; Udupa, Laxminarayana A

    2014-09-01

    While there are several tools to study learning styles of students, the visual-aural-read/write-kinesthetic (VARK) questionnaire is a simple, freely available, easy to administer tool that encourages students to describe their behavior in a manner they can identify with and accept. The aim is to understand the preferred sensory modality (or modalities) of students for learning. Teachers can use this knowledge to facilitate student learning. Moreover, students themselves can use this knowledge to change their learning habits. Five hundred undergraduate students belonging to two consecutive batches in their second year of undergraduate medical training were invited to participate in the exercise. Consenting students (415 students, 83%) were administered a printed form of version 7.0 of the VARK questionnaire. Besides the questionnaire, we also collected demographic data, academic performance data (marks obtained in 10th and 12th grades and last university examination), and self-perceived learning style preferences. The majority of students in our study had multiple learning preferences (68.7%). The predominant sensory modality of learning was aural (45.5%) and kinesthetic (33.1%). The learning style preference was not influenced by either sex or previous academic performance. Although we use a combination of teaching methods, there has not been an active effort to determine whether these adequately address the different types of learners. We hope these data will help us better our course contents and make learning a more fruitful experience. Copyright © 2014 The American Physiological Society.

  3. Research of test fault diagnosis method for micro-satellite PSS

    Science.gov (United States)

    Wu, Haichao; Wang, Jinqi; Yang, Zhi; Yan, Meizhi

    2017-11-01

    Along with the increase in the number of micro-satellite and the shortening of the product's lifecycle, negative effects of satellite ground test failure become more and more serious. Real-time and efficient fault diagnosis becomes more and more necessary. PSS plays an important role in the satellite ground test's safety and reliability as one of the most important subsystems that guarantees the safety of micro-satellite energy. Take test fault diagnosis method of micro-satellite PSS as research object. On the basis of system features of PSS and classic fault diagnosis methods, propose a kind of fault diagnosis method based on the layered and loose coupling way. This article can provide certain reference for fault diagnosis methods research of other subsystems of micro-satellite.

  4. Laminated Polymer Solar Cells with PEDOT:PSS Film as Anode

    Science.gov (United States)

    Hou, Teng; Liang, Chun-Jun; Zhang, Fu-Jun; He, Zhi-Qun; Sun, Kai

    2014-02-01

    A prefabricated conductive polymer film of polymer poly(3,4-ethylenedioxy-thiophene):poly (styrene-sulfonate) (PEDOT:PSS) is developed and is used as the anode in an inverted polymer solar cell (PSC) through a lamination process. The geometry structure of the PSC is indium tin oxide/interface layer/P3HT:PCBM/PEDOT:PSS. The PEDOT:PSS electrode is 5 μm and the sheet resistance is 10Ω/sq. The device fabrication process is vacuum-free and extremely simple. Lithium carbonate (Li2CO3) and cesium carbonate (Cs2CO3) are used as the cathode interface layers, respectively, and the result shows that Li2CO3 can enhance the open-circuit voltage (Voc) and fill factor distinctly, and the power conversion efficiency (PCE) can reach 2.1%.

  5. Predicting Intra-Individual Academic Achievement Trajectories of Adolescents Nested in Class Environment: Influence of motivation, implicit theory of intelligence, self-esteem and parenting

    Directory of Open Access Journals (Sweden)

    Isabelle Roskam

    2007-05-01

    Full Text Available In a longitudinal study conducted on 1130 adolescents (557 male and 573 female in the 1st-6th grades from Belgian secondary schools, we tested the influence of individual factors (motivational constructs, implicit theory of intelligence and self-esteem and environmental determinants (parenting and class environment of academic achievement (grades in mathematics, language arts and GPA at three points in time. Using hierarchical linear models, we observed a decrease of grade over the course of the study, reciprocal relations between motivational constructs, self-esteem and academic achievement, a strong positive impact of supportive parenting and a moderate influence of class environment.

  6. Family, peer, and neighborhood influences on academic achievement among African-American adolescents: one-year prospective effects.

    Science.gov (United States)

    Gonzales, N A; Cauce, A M; Friedman, R J; Mason, C A

    1996-06-01

    Using a 1-year prospective design, this study examined the influence of family status variables (family income, parental education, family structure), parenting variables (maternal support and restrictive control), peer support, and neighborhood risk on the school performance of 120 African American junior high school students. In addition to main effects of these variables, neighborhood risk was examined as a moderator of the effects of parenting and peer support. Family status variables were not predictive of adolescent school performance as indexed by self-reported grade point average. Maternal support at Time 1 was prospectively related to adolescent grades at Time 2. Neighborhood risk was related to lower grades, while peer support predicted better grades in the prospective analyses. Neighborhood risk also moderated the effects of maternal restrictive control and peer support on adolescent grades in prospective analyses. These findings highlight the importance of an ecological approach to the problem of academic underachievement within the African American Community.

  7. Influence of academic stress and season on 24-hour mean concentrations of ACTH, cortisol, and beta-endorphin.

    Science.gov (United States)

    Malarkey, W B; Pearl, D K; Demers, L M; Kiecolt-Glaser, J K; Glaser, R

    1995-01-01

    We investigated the influence of a common stressful event, i.e., academic examinations, on the 24-h mean concentration of adrenocorticotropic hormone (ACTH), cortisol, and/or beta-endorphin. In addition, we evaluated the effect of season on the endocrine response to this stressor. We studied medical students (n = 55), screened for a variety of health and life style factors, from three consecutive medical school classes 1 month before, during, and 2 weeks following examinations. Hourly blood samples were obtained from an indwelling catheter and two serum pools were made (0800-2200h = day and 2300-0700h = night). Examinations produced a significant (p perceived stress scores. In addition, we found a significant (p effect of examination stress on the increase in mean daytime but not nocturnal ACTH levels during autumn, but not during the spring. In contrast, the examination stress did not significantly affect day or night mean cortisol levels from baseline to examination week. We further divided the students by whether their perceived stress scores increased during examination week and fell during recovery (Group 1) or whether their perceived stress scores did not follow the expected pattern (Group 2). We found that in the Group 1 students who perceived the most stress, cortisol levels significantly increased (p academic stress had no significant effect on beta-endorphin levels. Finally, we found that the mean day and night ACTH levels were higher (p stress associated with the taking of examinations produces a dissociation among mean 24-h levels of ACTH, cortisol, and beta-endorphin. In addition, daytime cortisol levels increased during examinations only in the group of students whose perceived stress scores increased. Further, a seasonal influence on ACTH secretion was suggested by these results with higher levels observed in the spring than in the fall.

  8. INFLUENCE OF LEARNING STRATEGIES ON LEARNING STYLES: THEIR IMPACT ON ACADEMIC ACHIEVEMENT OF COLLEGE STUDENTS FROM BUENOS AIRES

    Directory of Open Access Journals (Sweden)

    Agustín Freiberg-Hoffmann

    2017-02-01

    Full Text Available Frequently, college students have issues to learn academic contents included in the subjects of their courses. Such low quality learning is reflected in failures and academic dropout, therefore being matters of concern for teachers and governments. Learning processes in college depend, in part, on the coincidence between teaching methods and students’ learning styles. They are defined as the preference of students when they have to deal with information, particularly the way to perceive it and process it. Learning styles can be trained by the repeated use of specific learning strategies. In such cases, when learning styles coincide with the learning context in order to facilitate the acquisition of new knowledge and its integration with previous information, academic success can be achieved more naturally. To get this match it is required from teachers to adapt their styles and strategies to their students’ learning preferences. Other alternative rests on the design of actions to train students in the use of the appropriate learning styles able to enhance learning. Focused on the second option, the present study aims at: 1 the description of the influence of different learning strategies on each learning style, and 2 the analysis of the way each style explains students’ academic achievement. A transversal, non-experimental, explicative design was employed. 763 college students from Buenos Aires with ages ranging from 17 to 36 years were included in the sample. Locally adapted versions of the Honey-Alonso Questionnaire of Learning Styles -CHAEA as its Spanish acronym-, and Learning and Study Strategies Inventory –LASSI- were used for data gathering. Results showed that the Accommodating style is explained positively and significantly by the Collaborative Learning, Resources for Learning and Information 2.0 Management Competence strategies. Besides, it is observed that the strategies Collaborative Learning, Resources for Learning and

  9. Development of a Paper Actuator with PEDOT:PSS Thin-Films as An Electrode

    Directory of Open Access Journals (Sweden)

    Yusuke Hara

    2014-12-01

    Full Text Available A paper actuator was fabricated from poly(3,4-ethylenedioxythiophene doped with poly(4-styrenesulfonate (PEDOT:PSS by a wet process without organic solvents. The paper actuator had a capacitor structure, with a cationic polymer as an insulating layer sandwiched between two PEDOT:PSS films as the electrodes. The thickness of the paper actuator was approximately 36 mm. We measured its displacement as a function of applied voltage and frequency; the maximum displacement was 2.2 mm at 1.5 V and 1 Hz.

  10. The dual axis radiographic hydrodynamic test (DARHT) facility personnel safety system (PSS) control system

    Energy Technology Data Exchange (ETDEWEB)

    Jacquez, Edward B [Los Alamos National Laboratory

    2008-01-01

    The mission of the Dual Axis Radiograph Hydrodynamic Test (DARHT) Facility is to conduct experiments on dynamic events of extremely dense materials. The PSS control system is designed specifically to prevent personnel from becoming exposed to radiation and explosive hazards during machine operations and/or the firing site operation. This paper will outline the Radiation Safety System (RSS) and the High Explosive Safety System (HESS) which are computer-controlled sets of positive interlocks, warning devices, and other exclusion mechanisms that together form the PSS.

  11. Asian American women in science, engineering, and mathematics: Background contextual and college environment influences on self-efficacy and academic achievement

    Science.gov (United States)

    Vogt, Kristen E.

    2005-07-01

    The purpose of this research study was to examine, for undergraduate women of various Asian American ethnic backgrounds, the influence of background contextual and college environment factors on their sense of academic self-efficacy and achievement in science, technology, engineering, and mathematics (STEM) majors. Social cognitive career theory and its critiques provided a theoretical foundation for relationships from past performance, socioeconomic status, acculturation, and college environment variables (compositional diversity, racial climate, gendered climate, academic peer support), to academic self-efficacy and achievement. Data were collected through an online survey. Instrumentation included the scales of Language, Identity, and Behavioral Acculturation; Gender Discrimination; Faculty and Classroom Behavior; Interactions with Peers; and Academic Milestones Self-efficacy. The participants were 228 Asian American undergraduate women in STEM at a large public, doctoral research extensive university on the east coast; the response rate was 51%. In three MANOVAs for nine social cognitive career variables, four ethnic groups (East, South, Southeast, and Multi-ethnic Asian American) significantly differed only on socioeconomic status. In path analysis, the initial model was not a good fit and was rejected. The model was respecified through statistical and theoretical evaluation, tested in exploratory analysis, and considered a good fit. The respecified model explained 36% of semester GPA (achievement) and 28% of academic self-efficacy. The academic achievement of Asian American women in STEM was related to past performance, background contextual factors, academic self-efficacy, academic peer support, and gendered climate. The strongest direct influence on achievement was academic self-efficacy followed by past performance. The total effect of Asian acculturation on achievement was negative and the total effect of American acculturation on achievement was not

  12. The Influence of Performance-Based Management on Teaching and Research Performance of Finnish Senior Academics

    Science.gov (United States)

    Kivistö, Jussi; Pekkola, Elias; Lyytinen, Anu

    2017-01-01

    Despite the widespread use of performance-based management in higher education, empirical research on its actual impact has remained scarce, particularly in Europe. With agency theory as a framework, our study utilised survey data collected from Finnish universities in order to explore the influence of performance management on perceived teaching…

  13. Enduring Influence of Stereotypical Computer Science Role Models on Women's Academic Aspirations

    Science.gov (United States)

    Cheryan, Sapna; Drury, Benjamin J.; Vichayapai, Marissa

    2013-01-01

    The current work examines whether a brief exposure to a computer science role model who fits stereotypes of computer scientists has a lasting influence on women's interest in the field. One-hundred undergraduate women who were not computer science majors met a female or male peer role model who embodied computer science stereotypes in appearance…

  14. The Influence of Employment on College Students' Academic Experiences

    Science.gov (United States)

    Curl, Angela L.; Benner, Kalea

    2017-01-01

    This cross-sectional survey study (N = 222) examined the influences of employment on graduate and undergraduate students enrolled in majors with significant internship or practicum requirements (journalism, social work, nursing and health sciences). The study is unique in that student perceptions regarding the challenges and rewards of working…

  15. The influence of high school academics on freshman college mathematics and science courses at SUNY Oswego

    Science.gov (United States)

    Hayali, Tolga

    This study examined the relationship between 2011 freshman college mathematics and science grades and freshman students' high school academics and demographic data, exploring the factors that contribute to the success of first-year STEM majoring freshman students at State University of New York at Oswego. The variables were Gender, Race, SES, School Size, Parent with College Education, High School Grade Point Average (HSGPA), Transfer Credit, SAT Composite Score, and New York State Regents Exam results, based on data from 237 freshman students entering college immediately following high school. The findings show HSGPA as a significant predictor of success in freshman College Mathematics and Sciences, Transfer Credit as a significant predictor in College Mathematics and College Chemistry, SES as a significant predictor in College Biology and College Chemistry, Parent with College Education as a significant predictor in College Biology and New York State Chemistry Regents Exam as a significant predictor in College Chemistry. Based on these findings, guidance counselors, science educators, and education institutions can develop a framework to determine which measurements are meaningful and advise students to focus on excellent performance in the Chemistry Regents Exams, take more college courses during high school, and maintain a high grade point average.

  16. The Influence of Conduct Problems and Callous-Unemotional Traits on Academic Development Among Youth.

    Science.gov (United States)

    Horan, Jacqueline M; Brown, Joshua L; Jones, Stephanie M; Aber, J Lawrence

    2016-06-01

    The present study attempted to address developmental differences within the large group of youth with conduct problems through an examination of the relationship between callous-unemotional traits and academic outcomes in an effort to expand the field's understanding of heterogeneity in outcomes associated with behavior problems. Data were collected from a cohort of 3rd grade students (N = 942; 51 % female; 45.6 % Hispanic/Latino, 41.1 % Black/African American, 4.7 % Non-Hispanic White; mean age = 8.07 years) in eighteen public elementary schools, as well as their parents and teachers. Hierarchical linear modeling revealed that callous-unemotional traits were associated with lower quality student-teacher relationships and worse performance on standardized math and reading exams over and above the effects of conduct problems. These findings suggest that school-based interventions may be particularly effective in ameliorating some of the deficits noted within this subset of youth exhibiting conduct problems. This finding has important policy implications as the field of developmental science attempts to design and enrich programs that focus on improving social-emotional learning.

  17. Structural and socio-psychological influences on adolescents' educational aspirations and subsequent academic achievement.

    Science.gov (United States)

    Rothon, Catherine; Arephin, Muna; Klineberg, Emily; Cattell, Vicky; Stansfeld, Stephen

    2011-06-01

    Previous literature indicates that educational aspirations are an important predictor of achievement at school and beyond. This paper examines the factors that are associated with high educational aspirations. It also looks at the relationship between aspirations and achievement at the General Certificate of Secondary Education in a deprived area of London. The results show that educational aspirations are associated with individual characteristics. Girls were more likely than boys to express a wish to remain in education beyond the age of 16. For the most academic route post-16, there were substantial ethnic differences, with minority ethnic groups generally being more likely to state a desire to follow this path. Students who were eligible for free school meals tended to have lower aspirations. Socio-psychological variables were also shown to be of importance, particularly self-esteem and psychological distress. Importantly, educational aspirations had a strong association with actual achievement at age 16, remaining associated even after controlling for a number of other variables, including prior achievement. These findings are discussed in light of previous research and potential intervention strategies.

  18. Academic failure and students' viewpoint: The influence of individual, internal and external organizational factors.

    Science.gov (United States)

    Najimi, Arash; Sharifirad, Gholamreza; Amini, Mehdi Mohammad; Meftagh, Sayyed Davood

    2013-01-01

    Educational failure is one of the most important problems in higher education institutes in Iran. This study was performed to investigate the factors affecting students' academic failure in Isfahan University of Medical Sciences. In this cross-sectional descriptive study, 280 students of Isfahan University of Medical Sciences were studied in 2009. They were chosen using multiple cluster sampling. The students' demographic characteristics and study information were collected by a valid and reliable questionnaire. Data were analyzed with SPSS (15) software. The most important factors affecting educational failure from students' point of view were: curriculum (4.23 ± 0.63), factors related to educator (3.88 ± 0.55), learning environment (3.63 ± 0.62), family factors (3.53 ± 0.6), socioeconomic factors (3.45 ± 0.69). There is a significant relationship between attitudes of students in two sexes and educator (P = 0.03) and socioeconomic environment (P = 0.003). In addition, the results did not show a significant difference between attitudes of students with age, marital status and employment status (P > 0.05). More attention to curriculum, factors related to educator and learning environment can prevent students' educational failure, in addition to preventing loss of resources and contribute to develop a more effective educational system.

  19. Large area ITO-free flexible white OLEDs with Orgacon™ PEDOT:PSS and printed metal shunting lines

    NARCIS (Netherlands)

    Harkema, S.; Mennema, S.; Barink, M.; Rooms, H.C.A.; Wilsona, J.S.; Mol, A.M.B. van; Bollen, D.

    2009-01-01

    We demonstrate the feasibility of white organic light-emitting diodes that exclude the transparent conductor indium-tinoxide. Instead, a highly conductive Orgacon™ PEDOT:PSS material in combination with a metal support structure is used as transparent anode and hole-injection layer. The PEDOT:PSS

  20. Changing academic roles and shifting gender inequalities: a case analysis of the influence of the teaching-research nexus on the academic career prospects of female academics in The Netherlands

    NARCIS (Netherlands)

    Leisyte, Liudvika; Dayican, B.

    2014-01-01

    The purpose of this study is to gain an understanding of the change in academic roles for female academics and the implications of this change for their career opportunities. In this article, we therefore aim to answer the following research questions: (1) How have the changes introduced by the new

  1. A Synthesis Model of Sustainable Market Orientation: Conceptualization, Measurement, and Influence on Academic Accreditation--A Case Study of Egyptian-Accredited Faculties

    Science.gov (United States)

    Abou-Warda, Sherein H.

    2014-01-01

    Higher education institutions are increasingly concerned about accreditation. Although sustainable market orientation (SMO) bears on academic accreditation, to date, no study has developed a valid scale of SMO or assessed its influence on accreditation. The purpose of this paper is to construct and validate an SMO scale that was developed in…

  2. Two Are Better than One: The Joint Influence of Maternal Preparedness for Parenting and Children's Self-Esteem on Academic Achievement and Adjustment

    Science.gov (United States)

    Farris, Jaelyn; Burke Lefever, Jennifer E.; Borkowski, John G.; Whitman, Thomas L.

    2013-01-01

    Research Findings: This study investigated the joint influence of maternal cognitive readiness to parent and children's self-esteem on children's academic achievement and behavioral adjustment in the classroom at age 10. Participants were 153 adolescent mothers and their firstborn children. Findings indicated that low levels of prenatal maternal…

  3. The Influence of Protege-Mentor Relationships and Social Networks on Women Doctoral Students' Academic Career Aspirations in Physical Sciences and Engineering

    Science.gov (United States)

    Gu, Yu

    2012-01-01

    Physical sciences and engineering doctoral programs serve as the most important conduit through which future academics are trained and prepared in these disciplines. This study examined women doctoral students' protege-mentor relationships in Physical sciences and engineering programs. Particularly, the study examined the influence of such…

  4. Influence of Marital Stressors on Role Performance of Married Academic Women in Tertiary Institutions in Cross River State and Need for Counselling Therein

    Science.gov (United States)

    Okpechi, Philip A.; Usani, Michael Okoi

    2015-01-01

    This study investigated the influence of marital stressors on role performance of married academic women of tertiary institutions in Cross River State. In order to accomplish the purpose of the study, two objectives and corresponding two hypotheses were postulated to guide the study. The survey research design was adopted in the study. A total of…

  5. An Action Research Study on the Influence of Gangsta Rap on Academic and Behavioral Issues of 5th Grade African-American Males

    Science.gov (United States)

    Lewis, Shaun; Boes, Susan R.; Chibbaro, Julie S.

    2015-01-01

    This small action research study (ARS) began with a review of the literature examining the relationship of gangsta rap in regards to academic achievement, self-esteem, decision-making, identity issues and development of young African American males. The purpose of the ARS was to examine the correlation between gangsta rap and its influence on 5th…

  6. The Influence of Self-Esteem and Selected Demographic Characteristics on First Semester Academic Achievement of Students Enrolled in a College of Agriculture

    Science.gov (United States)

    Gaspard, Mae B.; Burnett, Michael F.; Gaspard, Camile P.

    2011-01-01

    The primary purpose of this study was to determine the influence of self-esteem and selected demographic characteristics on academic achievement among students at the freshman level in the College of Agriculture at Louisiana State University. The sample of the study was all students at Louisiana State University enrolled in the Introduction to…

  7. How Can Students' Academic Performance in Statistics Be Improved? Testing the Influence of Social and Temporal-Self Comparison Feedback in a Web-Based Training Environment

    Science.gov (United States)

    Delaval, Marine; Michinov, Nicolas; Le Bohec, Olivier; Le Hénaff, Benjamin

    2017-01-01

    The aim of this study was to examine how social or temporal-self comparison feedback, delivered in real-time in a web-based training environment, could influence the academic performance of students in a statistics examination. First-year psychology students were given the opportunity to train for a statistics examination during a semester by…

  8. The Influence of Placement in an Inclusive Classroom on the Academic Performance of Non-Disabled Eleventh Grade Students in a Suburban New Jersey School District

    Science.gov (United States)

    Brown, Jocelyn Easley; Babo, Gerard

    2017-01-01

    The purpose of this study was to determine the influence, if any; assignment to an inclusive secondary language arts classroom setting has on the academic performance of grade 11 nondisabled general education students in two suburban New Jersey High Schools. Using a sampling process known as Propensity Score Matching (PSM), a statistical technique…

  9. RESEARCH OF INFLUENCE OF COMPUTER TRAINING OF FUTURE LAWYERS ON INDICATORS OF ACADEMIC ACHIEVEMENT

    Directory of Open Access Journals (Sweden)

    M.I. Sherman

    2014-06-01

    Full Text Available The article devoted to a research of influence of progress in Informatics and relative to it disciplines to the showings of educational progress. It has been analyzed the scientific attitude to the definition of term «educational progress». It has been substantiated that computer and information competency of future lawyers is not only a partial of professional activities but also a powerful tool of information tasks with educational character solving by a student in the process of his professional training in the university, that is displayed by the readings of educational progress. During the research we have received the value of coefficient of correlation between the values of final marks in the disciplines Informatics, Legal information retrieval systems, Legal statistics and the results of end-of-semester exams from the first to the forth course, the average score and quality coefficient of students' education progress in the control and experimental groups. During the research of influence of level of formedness of computer and information competency of future lawyers on the readings of the final progress in the educational subjects it has been established that: the level of formedness of base component of computer and information competence, that is provided by the learning of Informatics discipline on the information stage of working of system of professional computer and information training have positive influence on the showings of students' final progress in education subjects. This process is more effective in the experimental groups and to a greater extent it influences the coefficient of final progress quality than its average score; this influence especially visible is on the social and economic and humanitarian disciplines, it is confirmed by value of calculated coefficients of correlation; at the axiological stage of system function of professional computer and informational training the maximum values of the coefficients of

  10. Validation of the Participation Strategies Self-Efficacy Scale (PS-SES).

    Science.gov (United States)

    Lee, Danbi; Fogg, Louis; Baum, Carolyn M; Wolf, Timothy J; Hammel, Joy

    2018-01-01

    To develop and examine the psychometric properties of a newly developed Participation Strategies Self-Efficacy Scale (PS-SES) designed to assess self-efficacy in using participation strategies following a stroke. One hundred and sixty-six subjects with mild to moderate stroke were recruited and interviewed using the PS-SES. The principal axis factoring analysis was run to examine the factor structure, and internal consistency was assessed by computing Cronbach's alpha coefficient. The final measure is a 35-item scale with six subscales: (1) managing home participation, (2) staying organized, (3) planning and managing community participation, (4) managing work/productivity, (5) managing communication, and (6) advocating for resources. The instrument demonstrated high internal consistency. The PS-SES is a reliable measure offering unique information regarding self-efficacy in managing participation. Implications for Rehabilitation Post-stroke participation requires complex management of resources, information, and strategies. There is a gap in instruments that can assess self-efficacy in managing participation following a stroke. The PS-SES is a valid tool measuring self-efficacy in using participation strategies in home, work, and community contexts.

  11. Clinical and functional profile of patients with the Painful Shoulder Syndrome (PSS).

    Science.gov (United States)

    Dias, Daniela; Matos, Marcos; Daltro, Carla; Guimarães, Armênio

    2008-01-01

    The Painful Shoulder Syndrome (PSS) is characterized by varying degrees of pain and functional limitation. The aim of this study is to describe the clinical and functional profile of these patients. 136 patients undergoing clinical treatment for PSS were evaluated by a questionnaire regarding the following variables: sex, age, occupation, affected shoulder and its dominance, image diagnosis, pain location, intensity and characteristics, physical activity involving the shoulder, preferential position of upper limbs during occupational activity, limitation of movements during activities o daily living, and job absenteeism. 74.3% of the patients were women (pshoulder was affected most frequently (58.8%) and dominant (91.9%). Rotator cuff tear was the most frequent shoulder pathology (75.4%). Treatment was sought more commonly in the chronic stage of pain (61.0%). Pain, moderate in intensity, predominated in males (54.3%) and severe pain was more frequent in females (47.5%), restricted to the shoulder in 44.1% and worsening at night (50%). The upper limbs were used more frequently below shoulder level during usual daily activities (68.4%), and limitation of movements was present mainly in women (63.4%, p=0.017). Rotator cuff tear is the most frequent cause of PSS. PSS produces pain and functional limitation, especially in women.

  12. PSS and TCSC damping controller coordinated design using PSO in multi-machine power system

    Energy Technology Data Exchange (ETDEWEB)

    Shayeghi, H., E-mail: hshayeghi@gmail.co [Technical Engineering Department, University of Mohaghegh Ardabili, Ardabil (Iran, Islamic Republic of); Safari, A.; Shayanfar, H.A. [Center of Excellence for Power System Automation and Operation, Electrical Engineering Department, Iran University of Science and Technology, Tehran (Iran, Islamic Republic of)

    2010-12-15

    The paper develops a new design procedure for simultaneous coordinated designing of the thyristor controlled series capacitor (TCSC) damping controller and power system stabilizer (PSS) in multi-machine power system. The coordinated design problem of PSS and TCSC damping controllers over a wide range of loading conditions is converted to an optimization problem with the time domain-based objective function that is solved by a particle swarm optimization (PSO) technique which has a strong ability to find the most optimistic results. By minimizing the proposed fitness function in which oscillatory characteristics between areas are included and thus the interactions among the TCSC controller and PSS under transient conditions in the multi-machine power system are improved. To ensure the robustness of the proposed stabilizers, the design process takes a wide range of operating conditions into account. The effectiveness of the proposed controller is demonstrated through the nonlinear time-domain simulation and some performance indices studies. The results of these studies show that the proposed coordinated controllers have an excellent capability in damping power system inter-area oscillations and enhance greatly the dynamic stability of the power system. Moreover, it is superior to both the uncoordinated designed stabilizers of the PSS and the TCSC damping controller.

  13. Reflections on product/service-system (PSS) conceptualisation in a course setting

    DEFF Research Database (Denmark)

    Tan, Adrian; McAloone, Timothy Charles; Lauridsen, Erik Hagelskjær

    2009-01-01

    in a project course for the past five years. The methodology proposes four complementary dimensions of PSS: value proposition, product life cycle, activity modelling cycle and actor network, that all seem to comprehensively describe the essential conceptual design perspectives. Each of these dimensions...

  14. Temperature dependence of conductivity measurement for PEDOT:PSS and corresponding solar cell performance

    Science.gov (United States)

    Duarte, Fernanda; Myers, Brooke; Lucas, Tyler; Barnes, Brandon; Wang, Weining

    Conducting polymers have been studied and used widely; applications include light-emitting diodes, solar cells, and sensors. In our previous work, we have shown that conducting polymers can be used as the back contact of CdTe solar cells. Our results show that the efficiency of the CdTe solar cell increases as the conductivity of the polymer increases. For this reason, it is of interest to study the polymer conductivity's temperature dependence, and how it affects the solar cell. In this work, we show our studies on temperature dependence of conductivity measurement for poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and its effect on the CdTe/PEDOT:PSS solar cells. A series of PEDOT:PSS with different conductivities were studied, and a temperature-varying apparatus built in house, using a thermoelectric cooler module, was used to vary the temperature of the polymer films. The activation energy of PEDOT:PSS with different conductivity will be reported. The effect of the temperature on the short-circuit current, open-circuit voltage and efficiency of the solar cells will also be discussed. Clare Boothe Luce Foundation, Cottrell College Science Award from Research Corporation for Science Advancement.

  15. Comparing LCC with LCA to assess PSS sustainability: the case of the eco-box

    DEFF Research Database (Denmark)

    Chong, K.N.; Dreijer, L.S.; Howard, Thomas J.

    2014-01-01

    Product/Service-Systems strategies are increasingly proving to be a source of competitive advantage and environmental improvement for engineering companies, the main hypothesis being that PSS should allow to decouple functionality, user satisfaction and financial income on the one hand, from...

  16. Measuring Malaysia School Resource Centers' Standards through iQ-PSS: An Online Management Information System

    Science.gov (United States)

    Zainudin, Fadzliaton; Ismail, Kamarulzaman

    2010-01-01

    The Ministry of Education has come up with an innovative way to monitor the progress of 9,843 School Resource Centers (SRCs) using an online management information system called iQ-PSS (Quality Index of SRC). This paper aims to describe the data collection method and analyze the current state of SRCs in Malaysia and explain how the results can be…

  17. Exciton quenching at PEDOT:PSS anode in polymer blue-light-emitting diodes

    NARCIS (Netherlands)

    Abbaszadeh, D.; Wetzelaer, G.A.H.; Nicolai, H.T.; Blom, P.W.M.

    2014-01-01

    The quenching of excitons at the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) PEDOT:PSS) anode in blue polyalkoxyspirobifluorene-arylamine polymer light-emitting diodes is investigated. Due to the combination of a higher electron mobility and the presence of electron traps, the

  18. Exciton quenching at PEDOT : PSS anode in polymer blue-light-emitting diodes

    NARCIS (Netherlands)

    Abbaszadeh, D.; Wetzelaer, G. A. H.; Nicolai, H. T.; Blom, P. W. M.

    2014-01-01

    The quenching of excitons at the poly(3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS) anode in blue polyalkoxyspirobifluorene-arylamine polymer light-emitting diodes is investigated. Due to the combination of a higher electron mobility and the presence of electron traps, the

  19. Microscopic understanding of the anisotropic conductivity of PEDOT:PSS thin films

    NARCIS (Netherlands)

    Nardes, A.M.; Kemerink, M.; Janssen, R.A.J.; Bastiaansen, J.J.A.M.; Kiggen, N.M.M.; Langeveld, B.M.W.; Breemen, A.J.J.M. van; Kok, M.M. de

    2007-01-01

    The anisotropic conductivity of spin-coated poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films by temperature-dependent conductivity measurements, has been analyzed. A detailed 3D morphological model was derived from topographic scanning tunneling microscopy (STM) and

  20. Application of solvent modified PEDOT:PSS to graphene electrodes in organic solar cells.

    Science.gov (United States)

    Park, Hyesung; Shi, Yumeng; Kong, Jing

    2013-10-07

    Graphene has been proposed as a promising transparent conducting electrode material in organic photovoltaic (OPV) solar cells to substitute the widely used indium tin oxide (ITO). Various studies have reported OPV devices with graphene electrodes showing comparable performances to ITO-based OPV cells. However, the fabrication reliability or device yield has not been widely discussed. In our investigation it was found that graphene-based OPVs tend to have much lower device yield than the ITO-based ones if similar fabrication processes are used. One possible reason could be due to the challenge faced in obtaining a uniform coating of PEDOT:PSS hole injection layer (HIL) on graphene. In fact, several attempts have been made to overcome this challenge. In this work, we report a facile method of solvent modification of PEDOT:PSS to achieve a homogeneous coating on graphene. A significant enhancement in the device yield was observed as compared to devices using normal aqueous solution based PEDOT:PSS; nevertheless, it was still only ∼50%. Further improvement was made by adding an additional electron blocking layer (EBL), molybdenum trioxide, after the coating of PEDOT:PSS. The observation in this work calls for further investigation to understand the role played by the HIL or EBL in graphene-based OPV devices.

  1. Effect of liquid immersion of PEDOT: PSS-coated polyester fabric on surface resistance and wettability

    Science.gov (United States)

    Getnet Tadesse, Melkie; Loghin, Carmen; Chen, Yan; Wang, Lichuan; Catalin, Dumitras; Nierstrasz, Vincent

    2017-06-01

    Coating of textile fabrics with poly (3, 4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT:PSS) is one of the methods used for obtaining functional or smart applications. In this work, we prepared PEDOT:PSS polymer with certain additives such as polyethylene glycol, methanol (MeOH), and ethylene glycol on polyester fabric substrates by a simple immersion process. Surface resistance was measured and analyzed with analysis of variance to determine the coating parameters at 95% confidence level. Fourier transform infrared (FTIR) analysis and scanning electron microscopy (SEM) study of the samples were performed. Contact angle and washing fastness measurements were conducted, to observe the wettability and washing fastness of the samples, respectively. Surface resistance values were decreased by a factor of 100, due to conductive enhancers. As the immersion time and temperature condition varies, surface resistance showed no difference, statistically. FTIR analysis supports the idea that the mechanism responsible for the conductivity enhancement is the partial replacement of PSS from PEDOT chain by forming a hydrogen bond with hydroxyl ion (OH) of the conductive enhancers. A SEM images showed that PEDOT:PSS is well distributed to the surface of the fabrics. Contact angle measurements showed morphology change in the samples. The conductivity was reasonably stable after 10 washing cycles. Altogether, an effective simple immersion of coated polyester fabric is presented to achieve functional textiles that offer a broad range of possible applications.

  2. Effect of organic solvents on the properties of DWCNT/PEDOT:PSS transparent conductive films

    Science.gov (United States)

    Trinh Pham, Van; Thanh Cao, Thi; Le, Viet Cuong; Phan, Ngoc Hong; Pham, Duy Long; Phan, Ngoc Minh; Chuc Nguyen, Van

    2017-10-01

    In this study, the transparent conductive films (TCFs) based on double-walled carbon nanotube (DWCNT) and poly (3,4-ethylene dioxythiophene): poly (styrene sulfonate) (PEDOT:PSS) were fabricated on glass substrates by spin coating method at room temperature. The DWCNTs with COOH functional group were dispersed in three different organic solvents including acetone, isopropanol and ethanol. The effect of organic solvents on the surface morphology, optical transmittance and sheet resistance of the DWCNT/PEDOT:PSS films were characterized by using the field emission scanning electron microscopy (FESEM), UV–vis spectroscopy and four-point probe technique. The results showed that the DWCNT/PEDOT:PSS films with the DWCNT-COOH dispersed in ethanol solvent had high transmittance of 80.3% at the 550 nm wavelength, low sheet resistance of 14.5 Ω/□ and figure of merit of 7.69  ×  10‑3 Ω‑1. To evaluate the potential working performance in the photovoltaic devices, the prepared TCFs were used as a top electrode of the simple solar cell device based organic/inorganic (PEDOT:PSS/n-Si) hybrid structure. The highest power conversation efficiency (PCE) was obtained to be 5.35% for a cell using ethanol, which was about 2.3 and 1.4 times higher than that of cells using IPA and acetone as dispersion solvents for DWCNTs, respectively.

  3. Teacher-and child-managed academic activities in preschool and kindergarten and their influence on children's gains in emergent academic skills

    NARCIS (Netherlands)

    De Haan, Annika K E; Elbers, Ed; Leseman, Paul P M

    2014-01-01

    The aim of this study was to assess whether children's development benefited from teacher-and child-managed academic activities in the preschool and kindergarten classroom. Extensive systematic observations during four half-days in preschool (n = 8) and kindergarten (n = 8) classrooms revealed that

  4. A Major Decision: Identifying Factors that Influence Agriculture Students’ Choice of Academic Major

    Directory of Open Access Journals (Sweden)

    Kristin Stair

    2016-06-01

    Full Text Available Colleges of Agriculture (CoAs are estimated to supply only slightly more than half of the number of graduates needed to fill job openings through 2015. The purpose of this research study was to describe the factors influencing agriculture students’ choice of major. The population for this descriptive research study consisted of full-time CoA freshmen enrolled in AGRI 1001: Introduction to Agriculture at Louisiana State University. A total of 259 students were asked to participate in the electronic survey. All students completed the survey for a 100% response rate. Consistent with the model proposed by Hodges and Karpova (2010, the factors identified in this study included personal characteristics, interpersonal factors, and environmental factors. Moreover, contextual factors unique to agriculture were identified.

  5. The Thai version of the PSS-10: An Investigation of its psychometric properties

    Directory of Open Access Journals (Sweden)

    Wongpakaran Tinakon

    2010-06-01

    Full Text Available Abstract Background Among the stress instruments that measure the degree to which life events are perceived as stressful, the Perceived Stress Scale (PSS is widely used. The goal of this study was to examine the psychometric properties of a Thai version of the PSS-10 (T-PSS-10 with a clinical and non-clinical sample. Internal consistency, test-retest reliability, concurrent validity, and the factorial structure of the scale were tested. Methods A total sample of 479 adult participants was recruited for the study: 368 medical students and 111 patients from two hospitals in Northern Thailand. The T-PSS-10 was used along with the Thai version of State Trait Anxiety Inventory (STAI, the Thai Version of the Rosenberg Self-Esteem Scale (RSES, and the Thai Depression Inventory (TDI. Results Exploratory Factor Analysis (EFA yielded 2 factors with eigenvalues of 5.05 and 1.60, accounting for 66 percent of variance. Factor 1 consisted of 6 items representing "stress"; whereas Factor 2 consisted of 4 items representing "control". The item loadings ranged from 0.547 to 0.881. Investigation of the fit indices associated with Maximum Likelihood (ML estimation revealed that the two-factor solution was adequate [χ2 = 35.035 (df = 26, N = 368, p r = 0.60, p r = 0.55, p r = -0.46, p Conclusions The Thai version of the PSS-10 demonstrated excellent goodness-of-fit for the two factor solution model, as well as good reliability and validity for estimating the level of stress perception with a Thai population. Limitations of the study are discussed.

  6. Influence of study approaches and course design on academic success in the undergraduate anatomy laboratory.

    Science.gov (United States)

    Eleazer, Courtney D; Scopa Kelso, Rebecca

    2018-01-04

    Many pre-health professional programs require completion of an undergraduate anatomy course with a laboratory component, yet grades in these courses are often low. Many students perceive anatomy as a more challenging subject than other coursework, and the resulting anxiety surrounding this perception may be a significant contributor to poor performance. Well-planned and deliberate guidance from instructors, as well as thoughtful course design, may be necessary to assist students in finding the best approach to studying for anatomy. This article assesses which study habits are associated with course success and whether course design influences study habits. Surveys (n = 1,274) were administered to students enrolled in three undergraduate human anatomy laboratory courses with varying levels of cooperative learning and structured guidance. The surveys collected information on potential predictors of performance, including student demographics, educational background, self-assessment ability, and study methods (e.g., flashcards, textbooks, diagrams). Compared to low performers, high performers perceive studying in laboratory, asking the instructor questions, quizzing alone, and quizzing others as more effective for learning. Additionally, students co-enrolled in a flipped, active lecture anatomy course achieve higher grades and find active learning activities (e.g., quizzing alone and in groups) more helpful for their learning in the laboratory. These results strengthen previous research suggesting that student performance is more greatly enhanced by an active classroom environment that practices successful study strategies rather than one that simply encourages students to employ such strategies inside and outside the classroom. Anat Sci Educ. © 2018 American Association of Anatomists. © 2018 American Association of Anatomists.

  7. Influence of academic education on the perception of wood in watercourses.

    Science.gov (United States)

    Wyzga, Bartłomiej; Zawiejska, Joanna; Le Lay, Yves-François

    2009-01-01

    Human perception of in-channel wood can influence decision-making about wood reintroduction in watercourses for restoration purposes. A questionnaire survey was conducted among first-year and advanced Polish students and professionals involved in the management and protection of watercourses in Poland. The purpose was to assess their perception of river scenes with and without wood in terms of naturalness, aesthetics, danger and need for improvement. Generally, students perceived riverscapes with wood to be less aesthetic, more dangerous and needing more improvement than riverscapes without wood. However, many aspects of the riverscape perception are subject to changes as the student progresses in studying. The culturally conditioned, negative perception of in-channel wood is reduced during the education of geography and biology students but enhanced in the course of water engineering studies. The improved perception of watercourses containing wood was most pronounced for the advanced geography students from a university in which some tutors conducted research on in-channel wood and could have transferred knowledge about and positive attitudes toward wood to their students. A comparison of the riverscape evaluation by biology students and national park managers indicates that education in the discipline facilitates understanding of the environmental significance of in-channel wood although its effects are highly insufficient to form the positive attitude toward wood-containing watercourses typical of the managers. In turn, the education of water engineering students about in-channel wood apparently dominantly emphasizes threats caused by its presence in watercourses, so that the students' highly negative attitude toward wood needs to be significantly moderated when the graduates begin working as water authority managers.

  8. Clinical holistic medicine: factors influencing the therapeutic decision-making. From academic knowledge to emotional intelligence and spiritual "crazy" wisdom.

    Science.gov (United States)

    Ventegodt, Søren; Kandel, Isack; Merrick, Joav

    2007-12-10

    Scientific holistic medicine is built on holistic medical theory, on therapeutic and ethical principles. The rationale is that the therapist can take the patient into a state of salutogenesis, or existential healing, using his skills and knowledge. But how ever much we want to make therapy a science it remains partly an art, and the more developed the therapist becomes, the more of his/her decisions will be based on intuition, feeling and even inspiration that is more based on love and human concern and other spiritual motivations than on mental reason and rationality in a simple sense of the word. The provocative and paradoxal medieval western concept of the "truth telling clown", or the eastern concepts of "crazy wisdom" and "holy madness" seems highly relevant here. The problem is how we can ethically justify this kind of highly "irrational" therapeutic behavior in the rational setting of a medical institution. We argue here that holistic therapy has a very high success rate and is doing no harm to the patient, and encourage therapists, psychiatrists, psychologist and other academically trained "helpers" to constantly measure their own success-rate. This paper discusses many of the important factors that influence clinical holistic decision-making. Sexuality could, as many psychoanalysts from Freud to Reich and Searles have believed, be the most healing power that exists and also the most difficult for the mind to comprehend, and thus the most "crazy-wise" tool of therapy.

  9. Nano-gold assisted highly conducting and biocompatible bacterial cellulose-PEDOT:PSS films for biology-device interface applications.

    Science.gov (United States)

    Khan, Shaukat; Ul-Islam, Mazhar; Ullah, Muhammad Wajid; Israr, Muhammad; Jang, Jae Hyun; Park, Joong Kon

    2018-02-01

    This study reports the fabrication of highly conducting and biocompatible bacterial cellulose (BC)-gold nanoparticles (AuNPs)-poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) (BC-AuNPs-PEDOT:PSS) composites for biology-device interface applications. The composites were fabricated using ex situ incorporation of AuNPs and PEDOT:PSS into the BC matrix. Structural characterization, using scanning electron microscopy (SEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and x-ray diffraction (XRD) analysis, confirmed the uniform nature of the synthesized BC-AuNPs and BC-AuNPs-PEDOT:PSS composites. Four-point probe analysis indicated that the BC-AuNPs and BC-AuNPs-PEDOT:PSS films had high electrical conductivity. The composites were also tested for biocompatibility with animal osteoblasts (MC3T3-E1). The composite films supported adhesion, growth, and proliferation of MC3T3-E1 cells, indicating that they are biocompatible and non-cytotoxic. AuNPs and PEDOT:PSS, imparted a voltage response, while BC imparted biocompatibility and bio-adhesion to the nanocomposites. Therefore, our BC-AuNPs-PEDOT:PSS composites are candidate materials for biology-device interfaces to produce implantable devices in regenerative medicine. Copyright © 2017 Elsevier B.V. All rights reserved.

  10. Liquid Exfoliated Graphene as Dopant for Improving the Thermoelectric Power Factor of Conductive PEDOT:PSS Nanofilm with Hydrazine Treatment.

    Science.gov (United States)

    Xiong, Jinhua; Jiang, Fengxing; Shi, Hui; Xu, Jingkun; Liu, Congcong; Zhou, Weiqiang; Jiang, Qinglin; Zhu, Zhengyou; Hu, Yongjing

    2015-07-15

    Here, we fabricated a highly conductive poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) ( PSS) nanofilm via vacuum filtration with enhanced thermoelectric power factor by doping of liquid exfoliated graphene (GE) and hydrazine treatment. The effect of GE exfoliated in dimethylformamide (DMF) and N-methyl-2-pyrrolidone (NMP) on the electrical conductivity and thermopower of PSS was investigated. Although electrical conductivity decreased with increasing GE, thermoelectric power factors of PSS nanofilms were improved with 3 wt % GE in DMF (38.6 μW m(-1) K(-2)) and in NMP (28.0 μW m(-1) K(-2)) compared to pure PSS (11.5 μW m(-1) K(-2)). The mechanism of improvement was proposed to be the removal of PSS and the good interaction between PEDOT and GE. With hydrazine treatment, 3 wt % GE-doped PSS nanofilm (PG3) showed a further enhanced power factor of 53.3 μW m(-1) K(-2) (∼5 times higher than that of pristine PSS nanofilm). The effects of hydrazine containing concentration, treatment time, and temperature on the electrical conductivity and Seebeck coefficient of PG3 were investigated systematically. An estimated thermoelectric figure of merit (ZT) is 0.05 with the optimized power factor at room temperature.

  11. Enhanced thermoelectric properties of PEDOT/PSS/Te composite films treated with H{sub 2}SO{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Song, Haijun; Cai, Kefeng, E-mail: kfcai@tongji.edu.cn [Tongji University, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering (China); Shen, Shirley [CSIRO Manufacturing (Australia)

    2016-12-15

    Firstly, tellurium (Te) nanorods with a high Seebeck coefficient have been integrated into a conducting polymer PEDOT/PSS to form PEDOT/PSS/Te composite films. The Seebeck coefficient of the PEDOT/PSS/Te (90 wt.%) composite films is ~191 μV/K, which is about 13 times greater than that of pristine PEDOT/PSS. Then, H{sub 2}SO{sub 4} treatment has been used to further tune the thermoelectric properties of the composite films by adjusting the doping level and increasing the carrier concentration. After the acid treatment, the electrical conductivity of the composite films has increased from 0.22 to 1613 S/cm due to the removal of insulating PSS and the structural rearrangement of PEDOT. An optimized power factor of 42.1 μW/mK{sup 2} has been obtained at room temperature for a PEDOT/PSS/Te (80 wt.%) sample, which is about ten times larger than that of the untreated PEDOT/PSS/Te composite film.

  12. Psychometric properties of the Perceived Stress Scale (PSS): measurement invariance between athletes and non-athletes and construct validity

    Science.gov (United States)

    Lin, Ju-Han; Nien, Chiao-Lin; Hsu, Ya-Wen; Liu, Hong-Yu

    2016-01-01

    Background Although Perceived Stress Scale (PSS, Cohen, Kamarack & Mermelstein, 1983) has been validated and widely used in many domains, there is still no validation in sports by comparing athletes and non-athletes and examining related psychometric indices. Purpose The purpose of this study was to examine the measurement invariance of PSS between athletes and non-athletes, and examine construct validity and reliability in the sports contexts. Methods Study 1 sampled 359 college student-athletes (males = 233; females = 126) and 242 non-athletes (males = 124; females = 118) and examined factorial structure, measurement invariance and internal consistency. Study 2 sampled 196 student-athletes (males = 139, females = 57, Mage = 19.88 yrs, SD = 1.35) and examined discriminant validity and convergent validity of PSS. Study 3 sampled 37 student-athletes to assess test-retest reliability of PSS. Results Results found that 2-factor PSS-10 fitted the model the best and had appropriate reliability. Also, there was a measurement invariance between athletes and non-athletes; and PSS positively correlated with athletic burnout and life stress but negatively correlated with coping efficacy provided evidence of discriminant validity and convergent validity. Further, the test-retest reliability for PSS subscales was significant (r = .66 and r = .50). Discussion It is suggested that 2-factor PSS-10 can be a useful tool in assessing perceived stress either in sports or non-sports settings. We suggest future study may use 2-factor PSS-10 in examining the effects of stress on the athletic injury, burnout, and psychiatry disorders. PMID:27994983

  13. NiS(NPs)-PEDOT-PSS composite counter electrode for a high efficiency dye sensitized solar cell

    Energy Technology Data Exchange (ETDEWEB)

    Maiaugree, Wasan [Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002 (Thailand); Center for Alternative Energy Research and Development, Khon Kaen University, Khon Kaen 40002 (Thailand); Pimparue, Pachara; Jarernboon, Wirat [Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002 (Thailand); Pimanpang, Samuk [Department of Physics, Faculty of Science, Srinakharinwirot University, Bangkok 10110 (Thailand); Amornkitbamrung, Vittaya [Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002 (Thailand); Swatsitang, Ekaphan, E-mail: ekaphan@kku.ac.th [Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002 (Thailand); Center for Alternative Energy Research and Development, Khon Kaen University, Khon Kaen 40002 (Thailand)

    2017-06-15

    Graphical abstract: Figure(a) and (b) represent models depict PEDOT-PSS counter electrodes of DSSC without and with NiS NPs modification, respectively. The active surface area of PEDOT-PSS polymer can be improved by combining with NiS(NPs). The I-V curves in figure (c) show the superior photovoltaic conversion efficiency of 8.18% for NiS(NPs)/PEDOT-PSS DSSC. - Highlights: • Active surface area of PEDOT-PSS CE can be improved by mixing with NiS(NPs). • Electrocatalytic activity of mixed NiS(NPs)/PEDOT-PSS polymer is also improved. • NiS(NPs)/PEDOT-PSS CE shows a very low charge transfer resistance of 0.46 Ω. • In this work, the high photovoltaic conversion efficiency of 8.18% is achieved. - Abstract: Nickel sulfide (NiS) nanoparticles (NPs) (NiS(NPs)) were prepared by the hydrothermal method. X-ray diffraction (XRD) results indicate the hexagonal structure of NiS(NPs). SEM micrographs reveal the agglomeration of irregular hexagonal – shaped NiS(NPs) with estimated particle size in the range of 50–150 nm. Counter electrodes (CEs) of dye-sensitized solar cells (DSSCs) were prepared by coating the composite slurry of different NiS(NPs) loadings and Poly (3, 4-Ethylendioxythiophene) – Poly (Styrene Sulfonate) (PEDOT-PSS) on fluoride-doped tin oxide (FTO) substrates using a doctor blading technique. Cyclic voltammetry (CV) results indicate that the composites of NiS(NPs) and PEDOT-PSS (NiS(NPs)/PEDOT-PSS) films could function as a catalyst for I{sub 3}{sup −} reduction with a maximum cell efficiency of 8.18% for a cell of 0.3 g NiS(NPs) loading.

  14. Determining Factors for Stress Perception Assessed with the Perceived Stress Scale (PSS-4) in Spanish and Other European Samples.

    Science.gov (United States)

    Vallejo, Miguel A; Vallejo-Slocker, Laura; Fernández-Abascal, Enrique G; Mañanes, Guillermo

    2018-01-01

    Objective: Stress perception depends on cultural and social aspects that vary from one country to another. One of the most widely disseminated methods of assessing psychological stress is the Perceived Stress Scale (PSS-4). Therefore, in order to identify these factors and their impact on mental health, the present study compares the PSS-4 results among three European countries (Great Britain, France and Spain). This study focuses on PSS-4 results within a Spanish sample to determine: (1) normative data, reliability and validity of PSS-4 in a Spanish sample and (2) how stress perception changes depending on cultural and social factors. Methods: The data were obtained from a website representing a service of a smoking cessation program, the study represented a service that was open to all individuals. The number of participants were 37,451. They reported their age, gender, nationality, marital status, education and employment status, and completed two psychological questionnaires (PPS-4 and the anxiety and depression scales of the Symptom Checklist-90-Revised, SCL 90-R). Results: The PSS-4 scores could differentiate between relevant sociodemographic variables (such as sex, age, nationality, marital status, education, parental status, employment status, and income class). The PSS-4 scores showed a positive correlation with the SCL 90-R anxiety and depression scales. The normed values for interpreting the PSS-4 scores are presented. The PSS-4 showed adequate internal consistency and reliability. Conclusions: The PSS-4 is a useful instrument for assessing stress perception levels in the general population in different countries. Its internal consistency is sufficient for a 4-item scale.

  15. Psychometric properties of the Perceived Stress Scale (PSS): measurement invariance between athletes and non-athletes and construct validity.

    Science.gov (United States)

    Chiu, Yi-Hsiang; Lu, Frank Jing-Horng; Lin, Ju-Han; Nien, Chiao-Lin; Hsu, Ya-Wen; Liu, Hong-Yu

    2016-01-01

    Although Perceived Stress Scale (PSS, Cohen, Kamarack & Mermelstein, 1983) has been validated and widely used in many domains, there is still no validation in sports by comparing athletes and non-athletes and examining related psychometric indices. The purpose of this study was to examine the measurement invariance of PSS between athletes and non-athletes, and examine construct validity and reliability in the sports contexts. Study 1 sampled 359 college student-athletes (males = 233; females = 126) and 242 non-athletes (males = 124; females = 118) and examined factorial structure, measurement invariance and internal consistency. Study 2 sampled 196 student-athletes (males = 139, females = 57, Mage = 19.88 yrs, SD = 1.35) and examined discriminant validity and convergent validity of PSS. Study 3 sampled 37 student-athletes to assess test-retest reliability of PSS. Results found that 2-factor PSS-10 fitted the model the best and had appropriate reliability. Also, there was a measurement invariance between athletes and non-athletes; and PSS positively correlated with athletic burnout and life stress but negatively correlated with coping efficacy provided evidence of discriminant validity and convergent validity. Further, the test-retest reliability for PSS subscales was significant (r = .66 and r = .50). It is suggested that 2-factor PSS-10 can be a useful tool in assessing perceived stress either in sports or non-sports settings. We suggest future study may use 2-factor PSS-10 in examining the effects of stress on the athletic injury, burnout, and psychiatry disorders.

  16. Psychometric properties of the Perceived Stress Scale (PSS: measurement invariance between athletes and non-athletes and construct validity

    Directory of Open Access Journals (Sweden)

    Yi-Hsiang Chiu

    2016-12-01

    Full Text Available Background Although Perceived Stress Scale (PSS, Cohen, Kamarack & Mermelstein, 1983 has been validated and widely used in many domains, there is still no validation in sports by comparing athletes and non-athletes and examining related psychometric indices. Purpose The purpose of this study was to examine the measurement invariance of PSS between athletes and non-athletes, and examine construct validity and reliability in the sports contexts. Methods Study 1 sampled 359 college student-athletes (males = 233; females = 126 and 242 non-athletes (males = 124; females = 118 and examined factorial structure, measurement invariance and internal consistency. Study 2 sampled 196 student-athletes (males = 139, females = 57, Mage = 19.88 yrs, SD = 1.35 and examined discriminant validity and convergent validity of PSS. Study 3 sampled 37 student-athletes to assess test-retest reliability of PSS. Results Results found that 2-factor PSS-10 fitted the model the best and had appropriate reliability. Also, there was a measurement invariance between athletes and non-athletes; and PSS positively correlated with athletic burnout and life stress but negatively correlated with coping efficacy provided evidence of discriminant validity and convergent validity. Further, the test-retest reliability for PSS subscales was significant (r = .66 and r = .50. Discussion It is suggested that 2-factor PSS-10 can be a useful tool in assessing perceived stress either in sports or non-sports settings. We suggest future study may use 2-factor PSS-10 in examining the effects of stress on the athletic injury, burnout, and psychiatry disorders.

  17. Contextual Influences on Sources of Academic Self-Efficacy: A Validation with Secondary School Students of Kerala

    Science.gov (United States)

    Gafoor, K. Abdul; Ashraf, P. Muhammed

    2012-01-01

    This study investigates the theorized sources of Academic Self-Efficacy among the higher secondary school students of Kerala, India. Mastery Experience in the form of Academic Achievement, vicarious experience in the form of School Image and Social Persuasion in the form of Parental Encouragement are included as the predictor variables of Academic…

  18. The Influence of Africentric Values and Neighborhood Satisfaction on the Academic Self-Efficacy of African American Elementary School Children

    Science.gov (United States)

    Shin, Richard Q.

    2011-01-01

    This exploratory study examined the relationships between Africentric values, racial/ethnic identity, neighborhood satisfaction, and academic self-efficacy beliefs among 88 African American elementary school children. Results indicated that Africentric values and neighborhood satisfaction were both predictive of academic self-efficacy beliefs.…

  19. An Examination of the Influence of Institutional Context on Academic Progress Rates at Division I Institutions: A Multilevel Approach

    Science.gov (United States)

    McLaughlin, Jacqueline Elaine

    2012-01-01

    The growing attention given to intercollegiate athletics in recent years amid ongoing controversies highlights the importance of closely examining the implementation and impact of sports policy on college campuses. In an attempt to improve the academic performance and retention of student-athletes, the Academic Progress Rate (APR) was implemented…

  20. Exploring the Influence of Select Demographic, Academic, and Athletic Variables on the Retention of Student-Athletes

    Science.gov (United States)

    Johnson, James E.; Wessel, Roger D.; Pierce, David A.

    2013-01-01

    The population of 674 first-year student-athletes culled from 5 successive freshman classes (2004-2008) at a mid-size midwestern university was examined to determine what combination of demographic, academic, and athletic variables best predicted retention into the 2nd academic year. The dependent variable of retention was chosen because it is a…

  1. The Influence of Noncognitive Domains on Academic Achievement in K-12. Research Report. ETS RR-09-34

    Science.gov (United States)

    Lee, Jihyun; Shute, Valerie J.

    2009-01-01

    This paper identifies three noncognitive domains relevant for academic achievement in K-12-- student engagement, behavioral learning strategies, and school climate. The paper also documents empirical findings that show relationships between these three noncognitive domains and academic achievement, especially in the areas of reading and…

  2. Interaction between Cognitive and Non-Cognitive Factors: The Influences of Academic Goal Orientation and Working Memory on Mathematical Performance

    Science.gov (United States)

    Lee, Kerry; Ning, Flora; Goh, Hui Chin

    2014-01-01

    Although the effects of achievement goals and working memory on academic performance are well established, it is not clear whether they jointly affect academic performance. Children from Primary 4 and 6 (N = 608) were administered (a) measures of working memory and updating from the automated working memory battery and a running span task, (b)…

  3. Bringing service design to manufacturing companies: integrating PSS and service design approaches

    DEFF Research Database (Denmark)

    Costa, Nina; Patrício, Lia; Morelli, Nicola

    2018-01-01

    a design research methodology and built on Service-Dominant logic, integrating the human-oriented perspective of Service Design with an organizational network-oriented perspective of Product–Service System. It creates a new Integrative PSS approach, evolves design models, and provides an application...... in a manufacturing industry. This paper details how the application supports the design of product–service system solutions from the exploration to the implementation stages, highlighting the physical evidence of service, and contributes to advance design research at the intersection of PSS and Service Design.......Manufacturing companies increasingly try to innovate in their offers to consumers by creating more complete solutions that combine product and service components. However, shifting from a product-centric perspective to a solution-oriented perspective is challenging. The present study adopted...

  4. Revisiting PSS and service design in the light of the SD-logic

    DEFF Research Database (Denmark)

    Costa, Nina; Patrício, Lia; Morelli, Nicola

    2016-01-01

    are only means to an end. Also, different approaches, methods and tools have been developed to design value propositions however they still lack to explicit the SDlogic principles. The design of solutions that provide value-in-use is at the centre of both Product Service System (PSS) approach and service...... comprehensive discussion about these two approaches and proposes a conceptual framework for integrating PSS organizational point of view; and SD human-centred focus to design better service.......Researchers and practitioners have increasingly recognized the importance of offering value propositions to customers that enable value co-creation as discussed in the service dominant logic (SD-logic). SD-logic recognizes customers as active co-creators and posits that products and services...

  5. Dimensionalidade da escala de estresse percebido (Perceived Stress Scale, PSS-10 em uma amostra de professores

    Directory of Open Access Journals (Sweden)

    Wagner de Lara Machado

    2014-03-01

    Full Text Available O presente estudo teve por objetivo investigar a dimensionalidade da Escala de Estresse Percebido em sua versão de 10 itens (PSS-10 em uma amostra de professores (N = 517. Uma análise fatorial exploratória pelo método de extração minimum rank factor analysis, utilizando a matriz de correlações policóricas e o critério de análise paralela para retenção dos fatores indicou a solução unifatorial como a mais ajustada aos dados. Os itens possuíram cargas fatoriais adequadas e o fator retido explicou 67% da variância comum dos escores, apresentando consistência interna (a = 0,80. Este estudo fornece evidências de validade da PSS-10 no contexto brasileiro.

  6. The Danish Prostatic Symptom Score (DAN-PSS-1) questionnaire is reliable in stroke patients

    DEFF Research Database (Denmark)

    Tibaek, Sigrid; Jensen, Rigmor; Klarskov, Peter

    2006-01-01

    AIMS: To investigate the test-retest reliability of Danish Prostatic Symptom Score (DAN-PSS-1) questionnaire in a sample of stroke patients. METHODS: A prospective study design was used in which the stroke patients were invited to complete a postal self-administrated DAN-PSS-1 questionnaire twice....... The questionnaire consists of 12 questions related to lower urinary tract symptoms (LUTS). The participants were asked to state the frequency and severity of their symptoms (symptom score) and its impact on their daily life (bother score). Seventy-one stroke patients were included and 59 (83%) answered...... the questionnaire twice. The reliability test was done in two aspects: (a) detecting the frequency of each symptom and its bother factor, the scores were reduced to a two-category scale (=0, >0) and simple kappa statistics was used; (b) detecting the severity of each symptom and its bother factor, the total scale...

  7. A comprehensive Engineering Environment to conceptualize, design and monitor Product Service Systems (PSS) - an application case

    OpenAIRE

    Sala, Roberto; Sassanelli, Claudio; Pezzotta, Giuditta; Terzi, Sergio

    2017-01-01

    The last decades have seen a remarkable evolution in customers' needs and requests. Their interest moved from purchasing the single product to receiving a prolonged support throughout the product lifecycle. In order to answer to these new requests, companies proposed a solution combining products and services called Product-Service System (PSS). In this optic, the role of service engineering grew over time. However, the supply of services not originally created for the considered product resu...

  8. Energy level alignment at C{sub 60}/DTDCTB/PEDOT:PSS interfaces in organic photovoltaics

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, Jisu; Jung, Kwanwook; Jeong, Junkyeong; Hyun, Gyeongho [Institute of Physics and Applied Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722 (Korea, Republic of); Lee, Hyunbok, E-mail: hyunbok@kangwon.ac.kr [Department of Physics, Kangwon National University, Chuncheon-si, Gangwon-do 24341 (Korea, Republic of); Yi, Yeonjin, E-mail: yeonjin@yonsei.ac.kr [Institute of Physics and Applied Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722 (Korea, Republic of)

    2017-04-30

    Highlights: • The interfacial energy level alignment of C{sub 60}/DTDCTB/PEDOT:PSS was determined via in situ UPS and IPES measurements. • A large photovoltaic gap of 1.30 eV was evaluated between the DTDCTB donor and C{sub 60} acceptor. • A low hole extraction barrier of 0.42 eV from DTDCTB to PEDOT:PSS was evaluated. • The excellent electronic properties of DTDCTB with a narrow band gap were the source of its high OPV power conversion efficiencies. - Abstract: The electronic structure of a narrow band gap small molecule ditolylaminothienyl–benzothiadiazole–dicyanovinylene (DTDCTB), possessing a donor-acceptor-acceptor configuration, was investigated with regard to its application as an efficient donor material in organic photovoltaics (OPVs). The interfacial orbital alignment of C{sub 60}/DTDCTB/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was determined using in situ ultraviolet photoelectron and inverse photoelectron spectroscopic methods. The ionization energy and electron affinity values of DTDCTB were measured to be 5.27 eV and 3.65 eV, respectively, and thus a very small transport gap of 1.62 eV was evaluated. Large band bending of DTDCTB on PEDOT:PSS was observed, resulting in a low hole extraction barrier. Additionally, the photovoltaic gap between the highest occupied molecular orbital level of the DTDCTB donor and the lowest unoccupied molecular orbital level of the C{sub 60} acceptor was estimated to be 1.30 eV, which is known to be the theoretical maximum open-circuit voltage in OPVs employing the C{sub 60}/DTDCTB active layer. The unique electronic structures of DTDCTB contributed toward the recently reported excellent power conversion efficiencies of OPVs containing a DTDCTB donor material.

  9. A facile micropatterning method for a highly flexible PEDOT:PSS on SU-8

    KAUST Repository

    Cho, Nam Chul

    2016-04-17

    We report the micropatterning of conducting polymer on the epoxy-based photoresist to demonstrate fully organic, conducting and flexible electrodes. We show that polystyrene sulfonic acid can be covalently linked to the surface of the photoresist (SU-8) by forming sulfonyl ester at the interfaces. We also present an application of the patterned PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate)/SU-8 to the electroplating of metal electrodes. © 2016 Elsevier B.V.

  10. P-doped organic semiconductor: Potential replacement for PEDOT:PSS in organic photodetectors

    Energy Technology Data Exchange (ETDEWEB)

    Herrbach, J.; Revaux, A., E-mail: amelie.revaux@cea.fr [University of Grenoble Alpes, CEA-LITEN, Grenoble 38000 (France); Vuillaume, D. [IEMN, CNRS, University of Lille, Villeneuve d' Ascq 59652 (France); Kahn, A. [Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (United States)

    2016-08-15

    In this work, we present an alternative to the use of PEDOT:PSS as hole transport and electron blocking layers in organic photodetectors processed by solution. As Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) is known to be sensitive to humidity, oxygen, and UV, removing this layer is essential for lifetime improvements. As a first step to achieving this goal, we need to find an alternative layer that fulfills the same role in order to obtain a working diode with similar or better performance. As a replacement, a layer of poly[(4,8-bis-(2-ethylhexyloxy)-benzo(1,2-b:4,5-b′)dithiophene)-2, 6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene-)-2-6-diyl)] (PBDTTT-c) p-doped with the dopant tris-[1-(trifluoroethanoyl)-2-(trifluoromethyl)ethane-1,2-dithiolene] (Mo(tfd-COCF{sub 3}){sub 3}) is used. This p-doped layer effectively lowers the hole injection barrier, and the low electron affinity of the polymer prevents the injection of electrons into the active layer. We show similar device performance under light and the improvements of detection performance with the doped layer in comparison with PEDOT:PSS, leading to a detectivity of 1.9 × 10{sup 13} cm (Hz){sup 1/2} (W){sup −1}, competitive with silicon diodes used in imaging applications. Moreover, contrary to PEDOT:PSS, no localization of the p-doped layer is needed, leading to a diode active area defined by the patterned electrodes.

  11. Inkjet-Printed PEDOT:PSS Electrodes on Paper for Electrocardiography.

    Science.gov (United States)

    Bihar, Eloïse; Roberts, Timothée; Saadaoui, Mohamed; Hervé, Thierry; De Graaf, Jozina B; Malliaras, George G

    2017-03-01

    Inkjet-printed PEDOT:PSS electrodes are shown to record cutaneous electrophysiological signals such as electrocardiograms via a simple finger-to-electrode contact. The recordings are of high quality and show no deterioration over a 3 month period, paving the way for the development of the next generation of low-cost, convenient-to-use healthcare monitoring devices. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  12. Collaborative Product/Service-Systems – On conceptualisation of PSS offerings and business nets

    DEFF Research Database (Denmark)

    Mougaard, Krestine; Neugebauer, Line Maria; McAloone, Tim C.

    2012-01-01

    Collaborative PSS development and operation, where multiple stakeholders are involved, is an emerging research area. This articles looks at the intra and inter-organisational company considerations in the industry case of company collaboration in the maritime branch. Initial steps are taken towar...... a framework that aligns service strategies and their unique value proposition with a set of business nets that seeks lights on the value-logic and management mechanisms to design and control each network....

  13. Electromechanical properties of polyamide/lycra fabric treated with PEDOT:PSS

    Science.gov (United States)

    Tadesse, M. G.; Mengistie, D. A.; Loghin, C.; Chen, Y.; Wang, L.; Catalin, D.; Müller, C.; Nierstrasz, V.

    2017-10-01

    One of the challenges in smart textiles is to develop suitable multifunctional materials that can address simultaneously several characteristics such as durability, stretchability, lightweight, and conductivity. Conductive polymers which showed success in different technological fields like polymer solar cells and light emitting diodes are promising in many smart textile applications. In this work, we treated a common polyamide/lycra knitted fabric with PEDOT:PSS for stretchable e-textiles. PEDOT:PSS, with DMSO as a conductivity enhancer and different ratios of water-based polyurethane dispersions as a binder, was applied to the fabric with simple immersion and coating applications. The effect of different application methods and binder ratio on the surface resistance of the fabric was monitored with four point probe electrical surface resistance measurement systems. Samples prepared by immersion technique are more uniform and have higher conductivity than those prepared by a coating technique. SEM images showed that PEDOT:PSS is incorporated into the structure in the immersion method while in the coating it is majorly present on the surface of the fabric. The tensile measurement showed that the acidic PEDOT:PSS and polyurethane dispersion coating has no adverse effect on the tensile strength of the fabric. The coated samples can be stretched up to 700% while still reasonably conductive. The resistance increases only by a small amount when samples were stretched cyclically by stretching 100%. Generally, samples prepared by the immersion method maintained better conductivity while stretching than those by a coating method. The washing fastness of the samples was also assessed.

  14. Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

    Science.gov (United States)

    Xu, Binrui; Gopalan, Sai-Anand; Gopalan, Anantha-Iyengar; Muthuchamy, Nallal; Lee, Kwang-Pill; Lee, Jae-Sung; Jiang, Yu; Lee, Sang-Won; Kim, Sae-Wan; Kim, Ju-Seong; Jeong, Hyun-Min; Kwon, Jin-Beon; Bae, Jin-Hyuk; Kang, Shin-Won

    2017-03-01

    Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is most commonly used as an anode buffer layer in bulk-heterojunction (BHJ) polymer solar cells (PSCs). However, its hygroscopic and acidic nature contributes to the insufficient electrical conductivity, air stability and restricted photovoltaic (PV) performance for the fabricated PSCs. In this study, a new multifunctional additive, 2,3-dihydroxypyridine (DOH), has been used in the PEDOT: PSS buffer layer to obtain modified properties for PEDOT: PSS@DOH and achieve high PV performances. The electrical conductivity of PEDOT:PSS@DOH films was markedly improved compared with that of PEDOT:PSS. The PEDOT:PSS@DOH film exhibited excellent optical characteristics, appropriate work function alignment, and good surface properties in BHJ-PSCs. When a poly(3-hexylthiohpene):[6,6]-phenyl C61-butyric acid methyl ester blend system was applied as the photoactive layer, the power conversion efficiency of the resulting PSCs with PEDOT:PSS@DOH(1.0%) reached 3.49%, outperforming pristine PEDOT:PSS, exhibiting a power conversion enhancement of 20%. The device fabricated using PEDOT:PSS@DOH (1.0 wt%) also exhibited improved thermal and air stability. Our results also confirm that DOH, a basic pyridine derivative, facilitates adequate hydrogen bonding interactions with the sulfonic acid groups of PSS, induces the conformational transformation of PEDOT chains and contributes to the phase separation between PEDOT and PSS chains.

  15. Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells.

    Science.gov (United States)

    Xu, Binrui; Gopalan, Sai-Anand; Gopalan, Anantha-Iyengar; Muthuchamy, Nallal; Lee, Kwang-Pill; Lee, Jae-Sung; Jiang, Yu; Lee, Sang-Won; Kim, Sae-Wan; Kim, Ju-Seong; Jeong, Hyun-Min; Kwon, Jin-Beom; Bae, Jin-Hyuk; Kang, Shin-Won

    2017-03-24

    Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is most commonly used as an anode buffer layer in bulk-heterojunction (BHJ) polymer solar cells (PSCs). However, its hygroscopic and acidic nature contributes to the insufficient electrical conductivity, air stability and restricted photovoltaic (PV) performance for the fabricated PSCs. In this study, a new multifunctional additive, 2,3-dihydroxypyridine (DOH), has been used in the PEDOT: PSS buffer layer to obtain modified properties for PEDOT: PSS@DOH and achieve high PV performances. The electrical conductivity of PEDOT:PSS@DOH films was markedly improved compared with that of PEDOT:PSS. The PEDOT:PSS@DOH film exhibited excellent optical characteristics, appropriate work function alignment, and good surface properties in BHJ-PSCs. When a poly(3-hexylthiohpene):[6,6]-phenyl C61-butyric acid methyl ester blend system was applied as the photoactive layer, the power conversion efficiency of the resulting PSCs with PEDOT:PSS@DOH(1.0%) reached 3.49%, outperforming pristine PEDOT:PSS, exhibiting a power conversion enhancement of 20%. The device fabricated using PEDOT:PSS@DOH (1.0 wt%) also exhibited improved thermal and air stability. Our results also confirm that DOH, a basic pyridine derivative, facilitates adequate hydrogen bonding interactions with the sulfonic acid groups of PSS, induces the conformational transformation of PEDOT chains and contributes to the phase separation between PEDOT and PSS chains.

  16. Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

    Science.gov (United States)

    Xu, Binrui; Gopalan, Sai-Anand; Gopalan, Anantha-Iyengar; Muthuchamy, Nallal; Lee, Kwang-Pill; Lee, Jae-Sung; Jiang, Yu; Lee, Sang-Won; Kim, Sae-Wan; Kim, Ju-Seong; Jeong, Hyun-Min; Kwon, Jin-Beon; Bae, Jin-Hyuk; Kang, Shin-Won

    2017-01-01

    Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is most commonly used as an anode buffer layer in bulk-heterojunction (BHJ) polymer solar cells (PSCs). However, its hygroscopic and acidic nature contributes to the insufficient electrical conductivity, air stability and restricted photovoltaic (PV) performance for the fabricated PSCs. In this study, a new multifunctional additive, 2,3-dihydroxypyridine (DOH), has been used in the PEDOT: PSS buffer layer to obtain modified properties for PEDOT: PSS@DOH and achieve high PV performances. The electrical conductivity of PEDOT:PSS@DOH films was markedly improved compared with that of PEDOT:PSS. The PEDOT:PSS@DOH film exhibited excellent optical characteristics, appropriate work function alignment, and good surface properties in BHJ-PSCs. When a poly(3-hexylthiohpene):[6,6]-phenyl C61-butyric acid methyl ester blend system was applied as the photoactive layer, the power conversion efficiency of the resulting PSCs with PEDOT:PSS@DOH(1.0%) reached 3.49%, outperforming pristine PEDOT:PSS, exhibiting a power conversion enhancement of 20%. The device fabricated using PEDOT:PSS@DOH (1.0 wt%) also exhibited improved thermal and air stability. Our results also confirm that DOH, a basic pyridine derivative, facilitates adequate hydrogen bonding interactions with the sulfonic acid groups of PSS, induces the conformational transformation of PEDOT chains and contributes to the phase separation between PEDOT and PSS chains. PMID:28338088

  17. Analysis of the PEDOT:PSS/Si nanowire hybrid solar cell with a tail state model

    Science.gov (United States)

    Ho, Kuan-Ying; Li, Chi-Kang; Syu, Hong-Jhang; Lai, Yi; Lin, Ching-Fuh; Wu, Yuh-Renn

    2016-12-01

    In this paper, the electrical properties of the poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)/silicon nanowire hybrid solar cell have been analyzed and an optimized structure is proposed. In addition, the planar PEDOT:PSS/c-Si hybrid solar cell is also modeled for comparison. We first developed a simulation software which is capable of modeling organic/inorganic hybrid solar cells by including Gaussian shape density of states into Poisson and drift-diffusion solver to present the tail states and trap states in the organic material. Therefore, the model can handle carrier transport, generation, and recombination in both organic and inorganic materials. Our results show that at the applied voltage near open-circuit voltage (Voc), the recombination rate becomes much higher at the PEDOT:PSS/Si interface region, which limits the fill factor and Voc. Hence, a modified structure with a p-type amorphous silicon (a-Si) layer attached on the interface of Si layer and an n+-type Si layer inserted near the bottom contact are proposed. The highest conversion efficiency of 16.10% can be achieved if both structures are applied.

  18. Monitoring neural stem cell differentiation using PEDOT-PSS based MEA.

    Science.gov (United States)

    Furukawa, Yuriko; Shimada, Akiyoshi; Kato, Koichi; Iwata, Hiroo; Torimitsu, Keiichi

    2013-09-01

    Transplantation is one potential clinical application of neural stem cells (NSCs). However, it is very difficult to monitor/control NSCs after transplantation and so provide effective treatment. Electrical measurement using a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) modified microelectrode array (MEA) is a biocompatible, non-invasive, non-destructive approach to understanding cell conditions. This property makes continuous monitoring available for the evaluation/assessment of the development of cells such as NSCs. A PEDOT-PSS modified MEA was used to monitor electrical signals during NSC development in a culture derived from rat embryo striatum in order to understand the NSC differentiation conditions. Electrical data indicated that NSCs with nerve growth factor (NGF) generate a cultured cortical neuron-like burst pattern while a random noise pattern was measured with epidermal growth factor (EGF) at 4days in vitro (DIV) and a burst pattern was observed in both cases at 11 DIV indicating the successful monitoring of differentiation differences and developmental changes. The electrical analysis of cell activity using a PEDOT-PSS modified MEA could indicate neural network formation by differentiated neurons. Changes in NSC differentiation could be monitored. The method is based on non-invasive continuous measurement and so could prove a useful tool for the primary/preliminary evaluation of a pharmaceutical analysis. This article is part of a Special Issue entitled Organic Bioelectronics-Novel Applications in Biomedicine. Copyright © 2013 Elsevier B.V. All rights reserved.

  19. The Investigation of High Quality PEDOT:PSS Film by Multilayer-Processing and Acid Treatment

    Directory of Open Access Journals (Sweden)

    Po-Wen Sze

    2017-05-01

    Full Text Available In this study, we have investigated the performance of multilayer films of poly(3,4-ethylenedioxythiophene:poly(styrenesulfonate (PEDOT:PSS treated with one of the perfluorinated carboxylic acids, named trifluoroacetic acid (TFA. According to the increased density of the PEDOT chain under unit area conditions, the sheet resistance (Rsq has improved from 300 to 65 Ω/sq through additional processing of PEDOT:PSS from single layer to multilayer. After the further treatment with TFA, however, the Rsq of the multilayer PEDOT:PSS was enhanced to 45 Ω/sq, leading to the decline of film thickness from 400 to 270 nm. Both conductivity and work function based on X-ray photoelectron spectroscopy results have built a breakthrough by double-processing because of the higher density of conductive PEDOT chains and the increase of 0.4 eV alternatives to typical indium tin oxide substrate, respectively. This improvement is contributed to the development of more effective transparent electrodes.

  20. Gender matters, too: the influences of school racial discrimination and racial identity on academic engagement outcomes among African American adolescents.

    Science.gov (United States)

    Chavous, Tabbye M; Rivas-Drake, Deborah; Smalls, Ciara; Griffin, Tiffany; Cogburn, Courtney

    2008-05-01

    The authors examined relationships among racial identity, school-based racial discrimination experiences, and academic engagement outcomes for adolescent boys and girls in Grades 8 and 11 (n = 204 boys and n = 206 girls). The authors found gender differences in peer and classroom discrimination and in the impact of earlier and later discrimination experiences on academic outcomes. Racial centrality related positively to school performance and school importance attitudes for boys. Also, centrality moderated the relationship between discrimination and academic outcomes in ways that differed across gender. For boys, higher racial centrality related to diminished risk for lower school importance attitudes and grades from experiencing classroom discrimination relative to boys lower in centrality, and girls with higher centrality were protected against the negative impact of peer discrimination on school importance and academic self-concept. However, among lower race-central girls, peer discrimination related positively to academic self-concept. Finally, socioeconomic background moderated the relationship of discrimination with academic outcomes differently for girls and boys. The authors discuss the need to consider interactions of individual- and contextual-level factors in better understanding African American youths' academic and social development. (PsycINFO Database Record (c) 2008 APA, all rights reserved).

  1. Co-occurrences between adolescent substance use and academic performance: school context influences a multilevel-longitudinal perspective.

    Science.gov (United States)

    Andrade, Fernando H

    2014-08-01

    A growing body of literature has linked substance use and academic performance exploring substance use as a predictor of academic performance or vice versa. This study uses a different approach conceptualizing substance use and academic performance as parallel outcomes and exploring two topics: its multilevel-longitudinal association and school contextual effects on both outcomes. Using multilevel Confirmatory Factor Analysis and multilevel-longitudinal analyses, the empirical estimates relied on 7843 students nested in 114 schools (Add Health study). The main finding suggests that the correlation between substance use and academic performance was positive at the school level in contraposition to the negative relationship at the individual level. Additional findings suggest a positive effect of a school risk factor on substance use and a positive effect of academic pressure on academic performance. These findings represent a contribution to our understanding of how schools could affect the relationship between academic performance and substance use. Copyright © 2014 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.

  2. Optimizing the electrical properties of PEDOT:PSS films by co-solvents and their application in polymer photovoltaic cells

    Science.gov (United States)

    Pathak, C. S.; Singh, J. P.; Singh, R.

    2017-09-01

    A simple optimizing approach that improves the electrical properties of poly (3,4-ethylenedioxylthiophene):poly(styrenesulfonate) (PEDOT:PSS) films and their application in heterojunction diodes and polymer photovoltaic cells is presented in this paper. The optimizing process is performed by mixing the organic solvents n-methyl-2-pyrrolidone and methanol along with dimethyl sulfoxide into PEDOT:PSS solution achieving the facile combination of the solvent effect. Electrical conductivity varies from 0.16 to 194 S/cm by variation in the concentration of n-methyl-2-pyrrolidone. It is shown that the enhancement in conductivity of PEDOT:PSS films with co-solvents by three orders of magnitude is achieved compared to pristine PEDOT:PSS with transparency >92% in the visible region. The heterojunction diodes fabricated with co-solvents studied in this work showed rectifying behavior, and polymer photovoltaic cells fabricated with the co-solvents exhibited photovoltaic performance.

  3. The Vietnamese version of the Perceived Stress Scale (PSS-10): Translation equivalence and psychometric properties among older women.

    Science.gov (United States)

    Dao-Tran, Tiet-Hanh; Anderson, Debra; Seib, Charrlotte

    2017-02-06

    The Perceived Stress Scale 10 item (PSS-10) has been translated into more than 20 languages and used widely in different populations. Yet, to date, no study has tested psychometric properties of the instrument among older women and there is no Vietnamese version of the instrument. This study translated the PSS-10 into Vietnamese and assessed Vietnamese version of the Perceived Stress Scale 10 items (V-PSS-10) for translation equivalence, face validity, construct validity, correlations, internal consistency reliability, and test-retest reliability among 473 women aged 60 and over. The study found that V-PSS-10 retained the original meaning and was understood by Vietnamese older women. An exploratory factor analysis of the V-PSS-10 yielded a two-factor structure, and these two factors were significantly correlated (0.56, p perceived stress in future research and practice. However, future research would be useful to further endorse the validity and reliability of the V-PSS-10.

  4. Scalable and Facile Preparation of Highly Stretchable Electrospun PEDOT:PSS@PU Fibrous Nonwovens toward Wearable Conductive Textile Applications.

    Science.gov (United States)

    Ding, Yichun; Xu, Wenhui; Wang, Wenyu; Fong, Hao; Zhu, Zhengtao

    2017-09-06

    Flexible and stretchable conductive textiles are highly desired for potential applications in wearable electronics. This study demonstrates a scalable and facile preparation of all-organic nonwoven that is mechanically stretchable and electrically conductive. Polyurethane (PU) fibrous nonwoven is prepared via the electrospinning technique; in the following step, the electrospun PU nonwoven is dip-coated with the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). This simple method enables convenient preparation of PEDOT:PSS@PU nonwovens with initial sheet resistance in the range of 35-240 Ω/sq (i.e., the electrical conductivity in the range of 30-200 S m -1 ) by varying the number of dip-coating times. The resistance change of the PEDOT:PSS@PU nonwoven under stretch is investigated. The PEDOT:PSS@PU nonwoven is first stretched and then released repeatedly under certain strain (denoted as prestretching strain); the resistance of PEDOT:PSS@PU nonwoven becomes constant after the irreversible change for the first 10 stretch-release cycles. Thereafter, the resistance of the nonwoven does not vary appreciably under stretch as long as the strain is within the prestretching strain. Therefore, the PEDOT:PSS@PU nonwoven can be used as a stretchable conductor within the prestretching strain. Circuits using sheet and twisted yarn of the nonwovens as electric conductors are demonstrated.

  5. Evaluation of Psychometric Properties of the Arabic Version of PSS Stress Measuring Scale in the Moroccan Population

    Directory of Open Access Journals (Sweden)

    Dalal Ben Loubir

    2014-12-01

    Full Text Available This study was conducted to examine the psychometric properties of the classic Arabic version of the 10-item Perceived Stress Scale (PSS10 in a large sample of Moroccan population. A cross-sectional survey was yielded between December 2013 and January 2014 following an accidental sampling. Individuals aged above 18, from different socioeconomic categories, were invited to take part in the study. The participants had completed a questionnaire including the classic Arabic versions of PSS10. Two data collection methods involving the paper questionnaire (PQ and an electronic questionnaire (EQ were solicited. The psychometric properties of PSS10 were examined by internal consistency, test–retest reliability, convergent validity, and factorial structure. A total of 1,099 individuals have participated in the study. Internal consistencies of the classic Arabic PSS10 for both of PQ and EQ were respectively α = 0.72 and α = 0.85; the test–retest reliability score was 0.91. In both of PQ and EQ, PSS10 scores were higher among females (p < .01, and were positively and significantly correlated with the DASS21 subscales. The principal component analysis provided a two-factor structure. The percentages of variance explained by the two factors were 55.58 for EQ and 54.61 for PQ. The classic Arabic version of the PSS10 showed satisfactory psychometric properties in both data collection methods.

  6. Ready for College: Assessing the Influence of Student Engagement on Student Academic Motivation in a First-Year Experience Program

    OpenAIRE

    Ellis, Keyana Chamere

    2013-01-01

    The Virginia Tech Summer Academy (VTSA) Program, developed by through a collaborative partnership between faculty, administrators and staff concerned by attrition among-first year students, was introduced in summer 2012 as a campus initiative to assist first-year college students transition and acclimate to the academic and social systems of the campus environment. VTSA is a six-week intensive residential summer-bridge program that provides academic preparation, highly-individualized advising...

  7. Independent and combined influence of neonatal and current body composition on academic performance in youth: The UP & DOWN Study.

    Science.gov (United States)

    Esteban-Cornejo, I; Tejero-González, C M; Castro-Piñero, J; Conde-Caveda, J; Cabanas-Sanchez, V; Sallis, J F; Veiga, Óscar L

    2015-06-01

    Unhealthy body composition is a cause for concern across the lifespan. The objective of this study was to examine the independent and combined associations between neonatal and current body composition with academic performance among youth. This cross-sectional study was conducted with a total of 1557 youth (745 girls) aged 10.4 ± 3.4 years. Birth weight and length at birth were self-reported. Current body composition was assessed by body mass index (BMI), waist circumference (WC) and percentage of body fat (BF%). Academic performance was assessed through schools records. Birth weight was related to all academic variables in boys, independent of potential confounders, including BMI; whereas WC, BMI and BF% were related to all academic performance indicators in both boys and girls, independent of potential confounders, including birth weight (all P academic performance were observed in both boys and girls for grade point average (GPA) indicator. Boys in the group with none adverse effect had significantly higher scores in GPA (score +0.535; 95% confidence interval, 0.082-0.989) than boys in the group of both adverse effects (P academic performance in youth. © 2014 The Authors. Pediatric Obesity © 2014 World Obesity.

  8. The Influence of the Tutorial activity in the academic, didactic and social development of the tutors of biochemistry at UFV.

    Directory of Open Access Journals (Sweden)

    M.C. Baracat-Pereira

    2005-07-01

    Full Text Available The Tutorial Program  in Biochemistry, implemented at UFV in 2000, is characterized by the actuation of the  students as tutors, seeking to level the  prior  knowledge among students of biochemistry.  The tutors, official or volunteer,  are under graduated students (tutor I and post-graduated students (tutor II. The  aim of this  study  was to show the  profile of a tutor of biochemistry and  its influence in his academic,  didactic  and  social development.  A questionnaire of 31 questions  was answered  by tutors that acted  between  2000 and  2004, and  the  main  comments  were detached.   From  29 tutors  who frequented  the program  during the period (5 tutors II and 24 tutors I, 19 answered the questionnaire. The  average  time  of permanence  of the tutors in  this  program  was  9 months,  varying  from  4 to28 months.   Fourteen from the  19 students that worked  as tutors chose to  act  in the  program  for the  possibility  of teaching  and  also helped  them  to  be more  extroverted and  they  felt satisfied  to help other  people which contributes effectively for the  training of the  ones who want to  follow the academic career.  It also contributes professionally by increasing the capacity of relationship in group, dynamism,  decisions and  organization, characteristics that are more and more appraised  in the  job market.    It  was verified that the  studies  of the  tutors were modified  by  the  necessity  of preparing the  classes because  to teach,  you need to understand the subject  and  you need to present  it to the student in the best way, you have to consider the life and the previous knowledge of the student. To all of them,  the  program  helped them  to improve  the oratory  and  your organization and  develops a sense of professional  responsibility, assiduity  and  punctuality.  In general,  the

  9. PSS431

    Data.gov (United States)

    Department of Veterans Affairs — Returns a list of Unit Dose medications from data in the UNIT DOSE sub-file (#55.06) of the PHARMACY PATIENT file (#55) and dispensed drugs from the DISPENSE DRUG...

  10. Academic Integrity in a Mandatory Physics Lab: The Influence of Post-Graduate Aspirations and Grade Point Averages

    Science.gov (United States)

    Gallant, Tricia Bertram; Anderson, Michael G.; Killoran, Christine

    2013-03-01

    Research on academic cheating by high school students and undergraduates suggests that many students will do whatever it takes, including violating ethical classroom standards, to not be left behind or to race to the top. This behavior may be exacerbated among pre-med and pre-health professional school students enrolled in laboratory classes because of the typical disconnect between these students, their instructors and the perceived legitimacy of the laboratory work. There is little research, however, that has investigated the relationship between high aspirations and academic conduct. This study fills this research gap by investigating the beliefs, perceptions and self-reported academic conduct of highly aspirational students and their peers in mandatory physics labs. The findings suggest that physics laboratory classes may face particular challenges with highly aspirational students and cheating, but the paper offers practical solutions for addressing them.

  11. Electrical and Morphological Properties of Inkjet Printed Pedot/PSS Films

    Energy Technology Data Exchange (ETDEWEB)

    Garnett, E.; Ginley, D.

    2005-01-01

    Organic solar cells and LEDs are becoming more popular because their low cost materials, potential manufacturability, and recent gains in efficiency make them feasible for widespread commercialization in the near future. One significant manufacturing problem, especially for OLEDs, is the cost associated with creating patterned devices with spatially non-specific deposition methods such as spincoating. Inkjet printing can remove this problem. In recent years, inkjet printed polyethylene(3,4-dioxythiophene)/ polystyrene sulfonate (PEDOT/PSS) has been incorporated into many organic devices to help charge transfer, but there has not been much research regarding the effect of different printing parameters on the electrical and morphological film properties. In this work, an atomic force microscope, four point probe, and Kelvin probe were used to study the effects of printing parameters on roughness, conductivity and workfunction. Inkjet printed PEDOT films were also compared to spincoated films to determine how the polymer deposition method affects the above properties. Generally, inkjet printing created rougher but more conductive films with a smaller workfunction. Additionally, it was demonstrated that the workfunction of PEDOT films could be tuned over a range of about 0.5 V by changing the solvent mixture or substrate surface pretreatment. All additives to the as received PEDOT/PSS suspension caused the workfunction to decrease. It was discovered that workfunction decreases as printing voltage increases, but the trend reverses after annealing the films. This phenomenon suggests that when DMSO interacts with PEDOT, the workfunction changes. Finally, the results support previous publications suggesting that DMSO increases conductivity through a screening effect and also by changing the distribution of PEDOT and PSS in the film.

  12. Networking into Academic Discourse.

    Science.gov (United States)

    Warschauer, Mark

    2002-01-01

    Examines the experiences of three instructors in Hawaii who have attempted to integrate online communication into their academic writing courses. Emphasizes that the underlying assumptions of what academic writing constitutes are fundamental in influencing how teachers integrate technology in the classroom. (Author/VWL)

  13. Flow curve analysis of a Pickering emulsion-polymerized PEDOT:PSS/PS-based electrorheological fluid

    Science.gov (United States)

    Kim, So Hee; Choi, Hyoung Jin; Leong, Yee-Kwong

    2017-11-01

    The steady shear electrorheological (ER) response of poly(3, 4-ethylenedioxythiophene): poly(styrene sulfonate)/polystyrene (PEDOT:PSS/PS) composite particles, which were initially fabricated from Pickering emulsion polymerization, was tested with a 10 vol% ER fluid dispersed in a silicone oil. The model independent shear rate and yield stress obtained from the raw torque-rotational speed data using a Couette type rotational rheometer under an applied electric field strength were then analyzed by Tikhonov regularization, which is the most suitable technique for solving an ill-posed inverse problem. The shear stress-shear rate data also fitted well with the data extracted from the Bingham fluid model.

  14. Highly porous scaffolds of PEDOT:PSS for bone tissue engineering.

    Science.gov (United States)

    Guex, Anne Géraldine; Puetzer, Jennifer L; Armgarth, Astrid; Littmann, Elena; Stavrinidou, Eleni; Giannelis, Emmanuel P; Malliaras, George G; Stevens, Molly M

    2017-10-15

    Conjugated polymers have been increasingly considered for the design of conductive materials in the field of regenerative medicine. However, optimal scaffold properties addressing the complexity of the desired tissue still need to be developed. The focus of this study lies in the development and evaluation of a conductive scaffold for bone tissue engineering. In this study PEDOT:PSS scaffolds were designed and evaluated in vitro using MC3T3-E1 osteogenic precursor cells, and the cells were assessed for distinct differentiation stages and the expression of an osteogenic phenotype. Ice-templated PEDOT:PSS scaffolds presented high pore interconnectivity with a median pore diameter of 53.6±5.9µm and a total pore surface area of 7.72±1.7m(2)·g(-1). The electrical conductivity, based on I-V curves, was measured to be 140µS·cm(-1) with a reduced, but stable conductivity of 6.1µS·cm(-1) after 28days in cell culture media. MC3T3-E1 gene expression levels of ALPL, COL1A1 and RUNX2 were significantly enhanced after 4weeks, in line with increased extracellular matrix mineralisation, and osteocalcin deposition. These results demonstrate that a porous material, based purely on PEDOT:PSS, is suitable as a scaffold for bone tissue engineering and thus represents a promising candidate for regenerative medicine. Tissue engineering approaches have been increasingly considered for the repair of non-union fractions, craniofacial reconstruction or large bone defect replacements. The design of complex biomaterials and successful engineering of 3-dimensional tissue constructs is of paramount importance to meet this clinical need. Conductive scaffolds, based on conjugated polymers, present interesting candidates to address the piezoelectric properties of bone tissue and to induce enhanced osteogenesis upon implantation. However, conductive scaffolds have not been investigated in vitro in great measure. To this end, we have developed a highly porous, electrically conductive scaffold

  15. Si/PEDOT:PSS core/shell nanowire arrays for efficient hybrid solar cells.

    Science.gov (United States)

    Lu, Wenhui; Wang, Chengwei; Yue, Wei; Chen, Liwei

    2011-09-01

    A solution filling and drying method has been demonstrated to fabricate Si/PEDOT:PSS core/shell nanowire arrays for hybrid solar cells. The hybrid core/shell nanowire arrays show excellent broadband anti-reflection, and resulting hybrid solar cells absorb about 88% of AM 1.5G photons in the 300-1100 nm range. The power conversion efficiency (PCE) of the hybrid solar cell reaches 6.35%, and is primarily limited by direct and indirect interfacial recombination of charge carriers.

  16. Transparent graphene/PEDOT-PSS composite films as counter electrodes of dye-sensitized solar cells

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Wenjing; Xu, Yuxi; Lu, Gewu; Li, Chun; Shi, Gaoquan [Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084 (China)

    2008-10-15

    Composite films of graphene and polystyreneslufonate doped poly(3,4-ethylenedioxythiophene) (graphene/PEDOT-PSS) were deposited on indium tin oxide (ITO) substrates by spin coating at room temperature and applied as counter electrodes of dye-sensitized solar cells (DSSCs). A 60 nm thick composite film (contained 1 wt% graphene) coated ITO electrode exhibited high transmittance (>80%) at visible wavelengths and high electrocatalytic activity. The energy conversion efficiency of the cell with this film as counter electrode reached 4.5%, which is comparable to 6.3% of the cell with platinum counter electrode under the same experimental condition. (author)

  17. Transparent conductive electrodes from graphene/PEDOT:PSS hybrid inks for ultrathin organic photodetectors.

    Science.gov (United States)

    Liu, Zhaoyang; Parvez, Khaled; Li, Rongjin; Dong, Renhao; Feng, Xinliang; Müllen, Klaus

    2015-01-27

    A novel solution fabrication of large-area, highly conductive graphene films by spray-coating of a hybrid ink of exfoliated graphene (EG)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) (PH1000) is demonstrated. The fabricated graphene films exhibit excellent mechanical properties, thus enabling their application as bottom electrodes in ultrathin organic photodetector devices with performance comparable to that of the state-of-the-art Si-based inorganic photodetectors. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  18. The Evocative Influence of Child Academic and Social-Emotional Adjustment on Parent Involvement in Inner-City Schools

    Science.gov (United States)

    Hoglund, Wendy L. G.; Jones, Stephanie M.; Brown, Joshua L.; Aber, J. Lawrence

    2015-01-01

    The current study examines 3 alternative conceptual models of the directional associations between parent involvement in schooling (homework assistance, home-school conferencing, school-based support) and child adjustment (academic and social competence, aggressive behaviors). The parent socialization model tests the hypothesis that parent…

  19. The Influence of Racism-Related Stress on the Academic Motivation of Black and Latino/a Students

    Science.gov (United States)

    Reynolds, Amy L.; Sneva, Jacob N.; Beehler, Gregory P.

    2010-01-01

    This study examined the effects of racism-related stress on the academic and psychological factors affecting the success of 151 Black and Latino/a college students enrolled at several predominantly White universities in the northeastern United States. Institutional racism-related stress was negatively correlated with extrinsic motivation but…

  20. How Social Relationships Influence Academic Health in the "Enterprise University": An Insight into Productivity of Knowledge Workers

    Science.gov (United States)

    Ditton, Mary J.

    2009-01-01

    The comparatively poor mental health status of academics at Australian universities compared with the general Australian workforce poses a public health challenge. Productivity of knowledge workers is a key issue for the new economy. Using the case of one university, I interviewed employees stratified by level of employment and showed that their…

  1. The Influence of Neighborhood Characteristics and Parenting Practices on Academic Problems and Aggression Outcomes among Moderately to Highly Aggressive Children

    Science.gov (United States)

    Barry, Tammy D.; Lochman, John E.; Fite, Paula J.; Wells, Karen C.; Colder, Craig R.

    2012-01-01

    The current study utilized a longitudinal design to examine the effects of neighborhood and parenting on 120 at-risk children's academic and aggressive outcomes, concurrently and at two later timepoints during the transition to middle school. Random effects regression models were estimated to examine whether neighborhood characteristics and harsh…

  2. Associations between Emotional Intelligence, Socio-Emotional Adjustment, and Academic Achievement in Childhood: The Influence of Age

    Science.gov (United States)

    Brouzos, Andreas; Misailidi, Plousia; Hadjimattheou, Anastasia

    2014-01-01

    This study examined the relationship between trait emotional intelligence (EI) with children's socio-emotional adjustment at school and academic achievement. Children aged 8 to 10 (n = 106) and 11 to 13 years (n = 99) completed the youth version of the Emotional Quotient Inventory (EQ-i: YV). Their socio-emotional adjustment was measured with…

  3. Are there differences in ethnic majority and minority adolescents' friendships preferences and social influence with regard to their academic achievement?

    NARCIS (Netherlands)

    Stark, Tobias H.|info:eu-repo/dai/nl/335996701; Leszczensky, Lars; Pink, Sebastian

    Research has established that adolescents both befriend peers based on their academic achievement and adjust their own achievement to that of their friends’ over time. However, these processes may be different for ethnic minority students, because some of them may adhere to an oppositional culture

  4. The Influence of Academic and Social Factors of School Principals on the Success of Middle School Students in Urban Settings

    Science.gov (United States)

    Curtis, Tonya Yvette

    2012-01-01

    One thing is certain, accountability is here to stay; accountability exposes the good, the bad, and the ugly. The academic achievement gap between non-White and White students continues to exist in the disaggregated data in individual campuses, within school districts, and within comparison studies across the nation. Thus, school leadership is…

  5. Academic functioning and peer influences : A short-term longitudinal study of network-behavior dynamics in middle adolescence

    NARCIS (Netherlands)

    Rambaran, J. Ashwin; Hopmeyer, Andrea; Schwartz, David; Steglich, Christian; Badaly, Daryaneh; Veenstra, Rene

    In this study, the associations between peer effects and academic functioning in middle adolescence (N = 342; 14-15 years old; 48% male) were investigated longitudinally. Similarity in achievement (grade point averages) and unexplained absences (truancy) was explained by both peer selection and peer

  6. The Influence of Income, Experience, and Academic Qualification on the Early Childhood Education Teachers' Creativity in Semarang, Indonesia

    Science.gov (United States)

    Setiawan, Risky

    2017-01-01

    This study aims to determine: (1) the intercorrelation between income, experience, and academic qualification with the early childhood education teachers' teaching creativity; (2) to find out the dominant factors that affect the ability of teachers' Creativity in Semarang. This research uses an experimental design with four variables, including…

  7. The Influence of Academic Discipline, Race, and Gender on Web-Use Skills among Graduate-Level Students

    Science.gov (United States)

    Owens, Jennifer; Lilly, Flavius

    2017-01-01

    There is a paucity of research on the digital literacy of graduate-level students. The study examined whether academic discipline, age, gender, race, parental education, international status, GPA, and self-perceived skills is associated with web-use skills among this population. Hargittai and Hsieh's 27-item Web-use Skills Index was used to…

  8. Influence of Student Learning Experience on Academic Performance: The Mediator and Moderator Effects of Self-Regulation and Motivation

    Science.gov (United States)

    Ning, Hoi Kwan; Downing, Kevin

    2012-01-01

    This study examined the mediator and moderator roles of self-regulation and motivation constructs in the relationship between learning experience and academic success. Self-reported measures of learning experience, self-regulation and motivation were obtained from 384 undergraduate students from a university in Hong Kong. Structural equation…

  9. How Do College/University Teacher Misbehaviors Influence Student Cognitive Learning, Academic Self-Efficacy, Motivation, and Curiosity?

    Science.gov (United States)

    Banfield, Sara R.

    2009-01-01

    The purpose of this research was to examine the relationship between teacher misbehaviors and a variety of outcome variables, including cognitive learning, motivation, curiosity, and academic self-efficacy. Research has yet to directly address how teacher misbehaviors affect cognitive learning. It is important to assess actual learning as opposed…

  10. Identifying Mechanisms through Which Preschool Problem Behavior Influences Academic Outcomes: What Is the Mediating Role of Negative Peer Play Interactions?

    Science.gov (United States)

    Bulotsky-Shearer, Rebecca J.; Bell, Elizabeth R.; Romero, Sandy L.; Carter, Tracy M.

    2014-01-01

    Given theoretical and empirical support for the importance of peer play within the preschool classroom to early learning, the present study tested the hypothesis that associations between teacher-reported problem behavior and academic skills were mediated by difficulties in peer play (disruptive and disconnected play), for a representative sample…

  11. The Influence of a Career Pathways Model and Career Counseling on Students' Career and Academic Self-Efficacy

    Science.gov (United States)

    Stipanovic, Natalie; Stringfield, Sam; Witherell, Eric

    2017-01-01

    This qualitative study examines the effects of career pathways programming and targeted career counseling services on 71 high school seniors across seven schools engaged in school reforms funded through South Carolina's Education and Economic Development Act (EEDA). EEDA is a statewide, multipronged effort to improve academic achievement,…

  12. The Influence of Self-Efficacy and Motivational Factors on Academic Performance in General Chemistry Course: A Modeling Study

    Science.gov (United States)

    Alci, Bulent

    2015-01-01

    This study aims to determine the predictive and explanatory model in terms of university students' academic performance in "General Chemistry" course and their motivational features. The participants were 169 university students in the 1st grade at university. Of the participants, 132 were female and 37 were male students. Regarding…

  13. Former English Language Learners: A Case Study of the Perceived Influence of Developmental English Programs on Academic Achievement and Retention

    Science.gov (United States)

    Cigdem, Hayriye Nilgun

    2017-01-01

    The purpose of the study was to explore the perceptions of former ELL students on aspects of their learning community experiences in a New York City community college to better understand how participating in the learning community's one-semester developmental English program contributed to their increased academic achievement and persistence.…

  14. The Influence of Parenting Styles, Achievement Motivation, and Self-Efficacy on Academic Performance in College Students

    Science.gov (United States)

    Turner, Erlanger A.; Chandler, Megan; Heffer, Robert W.

    2009-01-01

    Parenting styles have consistently been shown to relate to various outcomes such as youth psychopathology, behavior problems, and academic performance. Building on the research in the parenting style literature, along with examining components of self-determination theory, the present study examined the relations among authoritative parenting…

  15. Conceptions of Scientific Knowledge Influence Learning of Academic Skills: Epistemic Beliefs and the Efficacy of Information Literacy Instruction

    Science.gov (United States)

    Rosman, Tom; Peter, Johannes; Mayer, Anne-Kathrin; Krampen, Günter

    2018-01-01

    The present article investigates the effects of epistemic beliefs (i.e. beliefs about the nature of knowledge and knowing) on the effectiveness of information literacy instruction (i.e. instruction on how to search for scholarly information in academic settings). We expected psychology students with less sophisticated beliefs (especially…

  16. Factors Influencing Academic Performance in Quantitative Courses among Undergraduate Business Students of a Public Higher Education Institution

    Science.gov (United States)

    Yousef, Darwish Abdulrahamn

    2017-01-01

    Purpose: This paper aims to investigate the impacts of teaching style, English language and communication and assessment methods on the academic performance of undergraduate business students in introductory quantitative courses such as Statistics for Business 1 and 2, Quantitative Methods for Business, Operations and Production Management and…

  17. Dynamics of teacher-student relationships: stability and change across elementary school and the influence on children's academic success

    NARCIS (Netherlands)

    Spilt, J.L.; Hughes, J.N.; Wu, J.Y.; Kwok, O.M.

    2012-01-01

    This study modeled teacher-student relationship trajectories throughout elementary school to predict gains in achievement in an ethnic-diverse sample of 657 academically at-risk students (mean age = 6.57 years, SD = .39). Teacher reports of warmth and conflict were collected in Grades 1-5.

  18. The Influence of Motivation and Adaptation on Students' Subjective Well-Being, Meaning in Life and Academic Performance

    Science.gov (United States)

    Bailey, Thomas Hamilton; Phillips, Lisa J.

    2016-01-01

    High rates of mental illness among students and discontinuation with university studies are regularly reported. The current study sought to explore relationships between motivation, university adaptation and indicators of mental health and well-being and academic performance of 184 first-year university students (73% female, mean age?=?19.3…

  19. A paper-based electrode using a graphene dot/PEDOT:PSS composite for flexible solar cells

    KAUST Repository

    Lee, Chuan-Pei

    2017-04-22

    We have synthesized a metal-free composite ink that contains graphene dots (GDs) and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) that can be used on paper to serve as the counter electrode in a flexible dye-sensitized solar cell (DSSC). This paper-based GD/PEDOT:PSS electrode is low-cost, light-weight, flexible, environmentally friendly, and easy to cut and process for device fabrication. We determined the GD/PEDOT:PSS composite effectively fills the dense micro-pores in the paper substrate, which leads to improved carrier transport in the electrode and a 3-fold enhanced cell efficiency as compared to the paper electrode made with sputtered Pt. Moreover, the DSSC with the paper electrode featuring the GD/PEDOT:PSS composite did not fail in photovoltaic tests even after bending the electrode 150 times, whereas the device made with the Pt-based paper electrode decreased in efficiency by 45% after such manipulation. These exceptional properties make the metal-free GD/PEDOT:PSS composite ink a promising electrode material for a wide variety of flexible electronic applications.

  20. Silicon surface passivation by PEDOT: PSS functionalized by SnO2 and TiO2 nanoparticles

    Science.gov (United States)

    García-Tecedor, M.; Karazhanov, S. Zh; Vásquez, G. C.; Haug, H.; Maestre, D.; Cremades, A.; Taeño, M.; Ramírez-Castellanos, J.; González-Calbet, J. M.; Piqueras, J.; You, C. C.; Marstein, E. S.

    2018-01-01

    In this paper, we present a study of silicon surface passivation based on the use of spin-coated hybrid composite layers. We investigate both undoped poly(3,4-ethylenedioxythiophene)/poly-(styrenesulfonate) (PEDOT:PSS), as well as PEDOT:PSS functionalized with semiconducting oxide nanomaterials (TiO2 and SnO2). The hybrid compound was deposited at room temperature by spin coating—a potentially lower cost, lower processing time and higher throughput alternative compared with the commonly used vacuum-based techniques. Photoluminescence imaging was used to characterize the electronic properties of the Si/PEDOT:PSS interface. Good surface passivation was achieved by PEDOT:PSS functionalized by semiconducting oxides. We show that control of the concentration of semiconducting oxide nanoparticles in the polymer is crucial in determining the passivation performance. A charge carrier lifetime of about 275 μs has been achieved when using SnO2 nanoparticles at a concentration of 0.5 wt.% as a filler in the composite film. X-ray diffraction (XRD), scanning electron microscopy, high resolution transmission electron microscopy (HRTEM), energy dispersive x-ray in an SEM, and μ-Raman spectroscopy have been used for the morphological, chemical and structural characterization. Finally, a simple model of a photovoltaic device based on PEDOT:PSS functionalized with semiconducting oxide nanoparticles has been fabricated and electrically characterized.

  1. PEDOT:PSS Nanofilms Fabricated by a Nonconventional Coating Method for Uses as Transparent Conducting Electrodes in Flexible Electrochromic Devices

    Directory of Open Access Journals (Sweden)

    Kanyanee Sanglee

    2017-01-01

    Full Text Available Nanofilms of a polymer mixer of two ionomers, poly 3,4-ethylenedioxythiophene:poly(styrene sulfonic acid (PEDOT:PSS, were used as conducting materials to develop transparent conducting electrodes. It was firstly found that convective deposition, a versatile and wide-area coating method, could be used for the coating and acid treatment of PEDOT:PSS films. Electrical conductivity of the PEDOT:PSS films was significantly enhanced up to 1814 S/cm by only one-time surface treatment by a mild acid solution (4 M methanesulfonic acid. This is because some PSS chains were removed out from the polymer mixer films without damage on the substrates. UV-vis-NIR spectroscopy, Raman spectroscopy, and cyclic voltammetry were used to characterize the acid-treated transparent conducting films. In this report, obtained transparent conducting PEDOT:PSS films on polyester substrates were used as flexible electrodes for fabrication of flexible electrochromic devices. Poly(3-hexylthiophene (P3HT was used as an active layer, which its color changed reversibly from transparent-light blue to purple with a small applied voltage (±3 V.

  2. In Situ Complementary Doping, Thermoelectric Improvements, and Strain-Induced Structure within Alternating PEDOT:PSS/PANI Layers.

    Science.gov (United States)

    Andrei, Virgil; Bethke, Kevin; Madzharova, Fani; Bronneberg, Aafke Cecile; Kneipp, Janina; Rademann, Klaus

    2017-09-27

    Although the deposition of alternating layers from poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and polyaniline (PANI) salts has recently provided a breakthrough in the field of conductive polymers, the cause for the conductivity improvement has remained unclear. In this work, we report a cooperative doping effect between alternating PANI base and PEDOT:PSS layers, resulting in electrical conductivities of 50-100 S cm-1 and power factors of up to 3.0 ± 0.5 μW m-1 K-2, which surpass some of the recent values obtained for protonated PANI/PEDOT:PSS multilayers by a factor of 20. In this case, the simultaneous improvement in the electrical conductivity of both types of layers is caused by the in situ protonation of PANI, which corresponds to the removal of the excess acidic PSS chains from the PEDOT:PSS grains. The interplay between the functional groups' reactivity and the supramolecular chain reorganization leads to an array of preparation-dependent phenomena, including a stepwise increase in the film thickness, an alternation in the electrical conductivity, and the formation of a diverse surface landscape. The latter effect can be traced to a buildup of strain within the layers, which results in either the formation of folds or the shrinkage of the film. These results open new paths for designing nanostructured thin-film thermoelectrics.

  3. High performance silicon-organic hybrid solar cells via improving conductivity of PEDOT:PSS with reduced graphene oxide

    Science.gov (United States)

    Jiang, Xinyu; Wang, Zilei; Han, Wenhui; Liu, Qiming; Lu, Shuqi; Wen, Yuxiang; Hou, Juan; Huang, Fei; Peng, Shanglong; He, Deyan; Cao, Guozhong

    2017-06-01

    The optical and electrical properties of PEDOT:PSS organic layer play a very important role in determining the power conversion efficiency (PCE) of Si-organic hybrid solar cells (HSCs). In the present study, properties of PEDOT:PSS thin films with reduced graphene oxide (rGO) and their impacts on the performances of the resultant Si-organic HSCs have been systematically investigated. The electrical conductivity of PEDOT:PSS improved 35% when rGO was added to PEDOT:PSS, and the fabricated HSCs with 2 mg/ml rGO addition yielded an PCE of 11.95% with a Jsc of 31.94 mAcm-2, a Voc of 579 mV and a FF of 0.648. However, excess rGO would deteriorate the solar cells performances and it might create additional defects and prevent carriers being collected. The Raman spectroscopy, sheet resistance and EQE analyses with rGO suggested that the interaction between the conductive rGO flakes and the aromatic PEDOT most probably not only provide additional charge transport pathways in hole transport layer to improve carrier mobility leading to a higher carrier collection efficiency, but also suppress the electron recombination at the junction interface. In addition, the rGO serve as an antireflection coating to reduce the reflectance of PEDOT:PSS thin film leading to further enhanced performances of solar cells.

  4. Substrate treatment and drying conditions effect on the properties of roll-to-roll gravure printed PEDOT:PSS thin films

    Energy Technology Data Exchange (ETDEWEB)

    Koidis, C. [Aristotle University of Thessaloniki, Physics Department, Lab for Thin Films-Nanosystems and Nanometrology, GR-54124 Thessaloniki (Greece); Logothetidis, S., E-mail: logot@auth.gr [Aristotle University of Thessaloniki, Physics Department, Lab for Thin Films-Nanosystems and Nanometrology, GR-54124 Thessaloniki (Greece); Kapnopoulos, C.; Karagiannidis, P.G.; Laskarakis, A. [Aristotle University of Thessaloniki, Physics Department, Lab for Thin Films-Nanosystems and Nanometrology, GR-54124 Thessaloniki (Greece); Hastas, N.A. [Aristotle University of Thessaloniki, Physics Department, Solid State Physics Section, GR-54124 Thessaloniki (Greece)

    2011-11-25

    Highlights: > Drying conditions effect on the optical, electrical and structural characteristics of R2R gravure printed PEDOT:PSS thin films > Insight on microstructural, compositional and electrical characteristics of the PEDOT:PSS films by Spectroscopic Ellipsometry combined with the AFM results > Drying temperature increase leads to less remained water volume fraction, smaller particles, lower film roughness and finally better conductivity > Transformation of spherical particles in solution to pancakes in thin films is attributed to the drying process > The increase of corona efficiency leads to a deeper PET surface modification without affecting the adhesion of PEDOT:PSS - Abstract: The optical, structural and electrical properties of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid) (PEDOT:PSS) thin films printed by roll-to-roll gravure have been investigated. Corona treatment has been applied to enhance the adhesion of PEDOT:PSS on PolyEthylene Terephthalate (PET) web. It has been found that there was a stronger in-depth surface modification of PET with the increase of corona efficiency; however, the adhesion of PEDOT:PSS was not actually affected. Also, Spectroscopic Ellipsometry and Atomic Force Microscopy have been used to extract information on the mechanisms that define PEDOT:PSS properties. The increase of the drying temperature of the PEDOT:PSS films has been found to reduce the remaining water inside the films and lead to the decrease of the PEDOT:PSS particles size.

  5. Efficient and Air-Stable Planar Perovskite Solar Cells Formed on Graphene-Oxide-Modified PEDOT:PSS Hole Transport Layer

    Science.gov (United States)

    Luo, Hui; Lin, Xuanhuai; Hou, Xian; Pan, Likun; Huang, Sumei; Chen, Xiaohong

    2017-10-01

    As a hole transport layer, PEDOT:PSS usually limits the stability and efficiency of perovskite solar cells (PSCs) due to its hygroscopic nature and inability to block electrons. Here, a graphene-oxide (GO)-modified PEDOT:PSS hole transport layer was fabricated by spin-coating a GO solution onto the PEDOT:PSS surface. PSCs fabricated on a GO-modified PEDOT:PSS layer exhibited a power conversion efficiency (PCE) of 15.34%, which is higher than 11.90% of PSCs with the PEDOT:PSS layer. Furthermore, the stability of the PSCs was significantly improved, with the PCE remaining at 83.5% of the initial PCE values after aging for 39 days in air. The hygroscopic PSS material at the PEDOT:PSS surface was partly removed during spin-coating with the GO solution, which improves the moisture resistance and decreases the contact barrier between the hole transport layer and perovskite layer. The scattered distribution of the GO at the PEDOT:PSS surface exhibits superior wettability, which helps to form a high-quality perovskite layer with better crystallinity and fewer pin holes. Furthermore, the hole extraction selectivity of the GO further inhibits the carrier recombination at the interface between the perovskite and PEDOT:PSS layers. Therefore, the cooperative interactions of these factors greatly improve the light absorption of the perovskite layer, the carrier transport and collection abilities of the PSCs, and especially the stability of the cells.

  6. The Effect of Academic Advising on Academic Performance of ...

    African Journals Online (AJOL)

    Although academic advising in Kenyan universities exists, no research has been done to find out how it impacts on students' educational and career goals. This research aimed at establishing the effect of academic advising on academic performance and the influence of year of study and gender on students' tendency to ...

  7. Medical students' perceptions of the factors influencing their academic performance: an exploratory interview study with high-achieving and re-sitting medical students.

    Science.gov (United States)

    Todres, Mathew; Tsimtsiou, Zoi; Sidhu, Kalwant; Stephenson, Anne; Jones, Roger

    2012-01-01

    Little is known about medical students' perceptions of the factors that influence their academic performance. To detect factors medical students, in the final years of their undergraduate medical studies, believe affect their academic performance. We conducted semi-structured interviews with high-achieving and re-sitting students in the final two years of their studies in a London medical school. Interviews were recorded and transcribed. Thematic content analysis was conducted. Similarities and differences in factors perceived to affect the academic performance of high-achieving and re-sitting students were identified. Eight re-sitting and ten high-achieving students were interviewed. Three core themes were identified: engagement with learning; reflections on learning methods and experiences and the application of learning to future practice. High-achieving students showed a greater awareness of what worked in terms of their approaches to learning and coping with difficulty than re-sitting students. There were also differences in the degree of positive engagement with peers, suggesting the positive contribution of socialising with other medical students. This exploratory qualitative study identified attitudes, behaviours and motivations that appeared to contribute to success or failure at medical school. Our findings suggest ways to improve appraisal, remediation and support mechanisms for students.

  8. Influence of social cognitive and ethnic variables on academic goals of underrepresented students in science and engineering: a multiple-groups analysis.

    Science.gov (United States)

    Byars-Winston, Angela; Estrada, Yannine; Howard, Christina; Davis, Dalelia; Zalapa, Juan

    2010-04-01

    This study investigated the academic interests and goals of 223 African American, Latino/a, Southeast Asian, and Native American undergraduate students in two groups: biological science and engineering (S/E) majors. Using social cognitive career theory (Lent, Brown, & Hackett, 1994), we examined the relationships of social cognitive variables (math/science academic self-efficacy, math/science outcome expectations), along with the influence of ethnic variables (ethnic identity, other-group orientation) and perceptions of campus climate to their math/science interests and goal commitment to earn an S/E degree. Path analysis revealed that the hypothesized model provided good overall fit to the data, revealing significant relationships from outcome expectations to interests and to goals. Paths from academic self-efficacy to S/E goals and from interests to S/E goals varied for students in engineering and biological science. For both groups, other-group orientation was positively related to self-efficacy and support was found for an efficacy-mediated relationship between perceived campus climate and goals. Theoretical and practical implications of the study's findings are considered as well as future research directions.

  9. Electrochemical Impedance Analysis of a PEDOT:PSS-Based Textile Energy Storage Device.

    Science.gov (United States)

    Nuramdhani, Ida; Gokceoren, Argun Talat; Odhiambo, Sheilla Atieno; De Mey, Gilbert; Hertleer, Carla; Van Langenhove, Lieva

    2017-12-28

    A textile-based energy storage device with electroactive PEDOT:PSS (poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate)) polymer functioning as a solid-state polyelectrolyte has been developed. The device was fabricated on textile fabric with two plies of stainless-steel electroconductive yarn as the electrodes. In this study, cyclic voltammetry and electrochemical impedance analysis were used to investigate ionic and electronic activities in the bulk of PEDOT:PSS and at its interfaces with stainless steel yarn electrodes. The complex behavior of ionic and electronic origins was observed in the interfacial region between the conductive polymer and the electrodes. The migration and diffusion of the ions involved were confirmed by the presence of the Warburg element with a phase shift of 45° (n = 0.5). Two different equivalent circuit models were found by simulating the model with the experimental results: (QR)(QR)(QR) for uncharged and (QR)(QR)(Q(RW)) for charged samples. The analyses also showed that the further the distance between electrodes, the lower the capacitance of the cell. The distribution of polymer on the cell surface also played important role to change the capacitance of the device. The results of this work may lead to a better understanding of the mechanism and how to improve the performance of the device.

  10. Energy level alignment at C60/DTDCTB/PEDOT:PSS interfaces in organic photovoltaics

    Science.gov (United States)

    Yoo, Jisu; Jung, Kwanwook; Jeong, Junkyeong; Hyun, Gyeongho; Lee, Hyunbok; Yi, Yeonjin

    2017-04-01

    The electronic structure of a narrow band gap small molecule ditolylaminothienyl-benzothiadiazole-dicyanovinylene (DTDCTB), possessing a donor-acceptor-acceptor configuration, was investigated with regard to its application as an efficient donor material in organic photovoltaics (OPVs). The interfacial orbital alignment of C60/DTDCTB/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was determined using in situ ultraviolet photoelectron and inverse photoelectron spectroscopic methods. The ionization energy and electron affinity values of DTDCTB were measured to be 5.27 eV and 3.65 eV, respectively, and thus a very small transport gap of 1.62 eV was evaluated. Large band bending of DTDCTB on PEDOT:PSS was observed, resulting in a low hole extraction barrier. Additionally, the photovoltaic gap between the highest occupied molecular orbital level of the DTDCTB donor and the lowest unoccupied molecular orbital level of the C60 acceptor was estimated to be 1.30 eV, which is known to be the theoretical maximum open-circuit voltage in OPVs employing the C60/DTDCTB active layer. The unique electronic structures of DTDCTB contributed toward the recently reported excellent power conversion efficiencies of OPVs containing a DTDCTB donor material.

  11. Planning Support Systems (PSS-Based Spatial Plan Alternatives and Environmental Assessment

    Directory of Open Access Journals (Sweden)

    Hee-Sun Choi

    2016-03-01

    Full Text Available Spatial planning is at the core of national land and urban development. Many countries and cities seek sustainable development through various means such as coordinated environmental planning, environmental assessment, and internalization of environmental analysis and planning. A Planning Support System (PSS is a GIS (Geographic Information System-based, spatial decision-making support system that incorporates a variety of theories and pertinent models. This study adopted the “What if?” model to design an alternative spatial plan that includes generation of predictive scenarios and is relatively easy to use. In the cities studied, we identified a total of six scenarios based on the main drivers of development—namely, population and spatial policies. Subsequently, we assessed the alternatives for their environmental impact, preparing sensitivity maps for each major environmental issue in the target area (natural ecosystem, air and microclimate, natural disasters. One projected advantage of the “What if?” model is that its digital visualization of proposed plans may improve public awareness and involvement. Furthermore, the tool is expected to be highly useful in ensuring the objectivity of quantitative analyses. However, it is necessary to develop a PSS that is both standardized and tailored to the particular needs of each area. Finally, the development of an e-governance system will be beneficial in ensuring public access to the decision making process.

  12. Development of a Flexible Strain Sensor Based on PEDOT:PSS for Thin Film Structures

    Directory of Open Access Journals (Sweden)

    Alexandra El Zein

    2017-06-01

    Full Text Available The aim of this study was to develop and optimize a reproducible flexible sensor adapted to thin low-density polyethylene (LDPE films and/or structures to enable their deformation measurements. As these deformations are suspected to be weak (less than 10%, the developed sensor needs to be particularly sensitive. Moreover, it is of prime importance that sensor integration and usability do not modify the mechanical behavior of its LDPE substrate. The literature review allowed several materials to be investigated and an elastomer/intrinsically conductive polymer PEDOT:PSS (CleviosTM filled composite was selected to simultaneously combine mechanical properties and electrical conductivity. This composite (made of PEDOT:PSS and silicone Bluesil® presented satisfying compatibilities with piezoresistive effects, negative temperature performances (in a range from −60 °C to 20 °C, as well as elongation properties (until the elastic limit of the substrate was reached. The method used for creating the sensor is fully described, as are the optimization of the sensor manufacture in terms of used materials, the used amount of materials where the percolation theory aspects must be considered, the adhesion to the substrate, and the manufacturing protocol. Electromechanical characterization was performed to assess the gauge factor (K of the sensor on its substrate.

  13. Microtexturing of the conductive PEDOT:PSS Polymer for superhydrophobic organic electrochemical transistors

    KAUST Repository

    Gentile, Francesco

    2014-01-22

    Superhydrophobic surfaces are bioinspired, nanotechnology artifacts, which feature a reduced friction coefficient, whereby they can be used for a number of very practical applications including, on the medical side, the manipulation of biological solutions. In this work, we integrated superhydrophobic patterns with the conducting polymer PEDOT:PSS, one of the most used polymers in organic electronics because highly sensitive to ionized species in solution. In doing so, we combined geometry and materials science to obtain an advanced device where, on account of the superhydrophobicity of the system, the solutions of interest can be manipulated and, on account of the conductive PEDOT:PSS polymer, the charged molecules dispersed inside can be quantitatively measured. This original substrate preparation allowed to perform electrochemical measurements on ionized species in solution with decreasing concentration down to 10 -7 molar. Moreover, it was demonstrated the ability of the device of realizing specific, combined time and space resolved analysis of the sample. Collectively, these results demonstrate how a tight, interweaving integration of different disciplines can provide realistic tools for the detection of pathologies. The scheme here introduced offers breakthrough capabilities that are expected to radically improve both the pace and the productivity of biomedical research, creating an access revolution. 2014 Francesco Gentile et al.

  14. Electrochemical Impedance Analysis of a PEDOT:PSS-Based Textile Energy Storage Device

    Directory of Open Access Journals (Sweden)

    Ida Nuramdhani

    2017-12-01

    Full Text Available A textile-based energy storage device with electroactive PEDOT:PSS (poly(3,4-ethylenedioxythiophene/poly(4-styrenesulfonate polymer functioning as a solid-state polyelectrolyte has been developed. The device was fabricated on textile fabric with two plies of stainless-steel electroconductive yarn as the electrodes. In this study, cyclic voltammetry and electrochemical impedance analysis were used to investigate ionic and electronic activities in the bulk of PEDOT:PSS and at its interfaces with stainless steel yarn electrodes. The complex behavior of ionic and electronic origins was observed in the interfacial region between the conductive polymer and the electrodes. The migration and diffusion of the ions involved were confirmed by the presence of the Warburg element with a phase shift of 45° (n = 0.5. Two different equivalent circuit models were found by simulating the model with the experimental results: (QR(QR(QR for uncharged and (QR(QR(Q(RW for charged samples. The analyses also showed that the further the distance between electrodes, the lower the capacitance of the cell. The distribution of polymer on the cell surface also played important role to change the capacitance of the device. The results of this work may lead to a better understanding of the mechanism and how to improve the performance of the device.

  15. Tailoring the Electrochemical and Mechanical Properties of PEDOT:PSS Films for Bioelectronics

    KAUST Repository

    Elmahmoudy, Mohammed

    2017-02-21

    The effect of 3-glycidoxypropyltrimethoxysilane (GOPS) content in poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) dispersions on the properties of films spun cast from these formulations is investigated. It has been found out that the concentration of GOPS has a tremendous, yet gradual impact on the electrical, electrochemical, and mechanical properties of the PEDOT:PSS/GOPS films and that there is an optimum concentration which maximizes a particular feature of the film such as its water uptake or elasticity. The benefits of aqueous stability and mechanical strength with GOPS are to be compensated by an increase in the electrochemical impedance. GOPS aids obtaining excellent mechanical integrity in aqueous media with still highly conducting properties. Moreover, active devices like organic electrochemical transistors that contain 1 wt% GOPS, which is a concentration that leads to film with high electrical conductivity with sufficient mechanical stability and softness, exhibit steady performance over three weeks. These results suggest that variations in the concentration of such an additive like GOPS can enable a facile co-optimization of electrical and mechanical properties of a conducting polymer film for in vivo bioelectronics application.

  16. American Sign Language and Academic English: Factors Influencing the Reading of Bilingual Secondary School Deaf and Hard of Hearing Students.

    Science.gov (United States)

    Scott, Jessica A; Hoffmeister, Robert J

    2017-01-01

    For many years, researchers have sought to understand the reading development of deaf and hard of hearing (DHH) students. Guided by prior research on DHH and hearing students, in this study we investigate the hypothesis that for secondary school DHH students enrolled in American Sign Language (ASL)/English bilingual schools for the deaf, academic English proficiency would be a significant predictor of reading comprehension alongside ASL proficiency. Using linear regression, we found statistically significant interaction effects between academic English knowledge and word reading fluency in predicting the reading comprehension scores of the participants. However, ASL remained the strongest and most consistent predictor of reading comprehension within the sample. Findings support a model in which socio-demographic factors, ASL proficiency, and word reading fluency are primary predictors of reading comprehension for secondary DHH students. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@.com.

  17. Racial Socialization, Racial Identity, and Academic Attitudes Among African American Adolescents: Examining the Moderating Influence of Parent–Adolescent Communication

    Science.gov (United States)

    McLoyd, Vonnie C.; Hallman, Samantha K.

    2017-01-01

    A significant gap remains in our understanding of the conditions under which parents’ racial socialization has consequences for adolescents’ functioning. The present study used longitudinal data to examine whether the frequency of communication between African American parents and adolescents (N = 504; 49 % female) moderates the association between parent reports of racial socialization (i.e., cultural socialization and preparation for bias) at 8th grade and adolescent reports of racial identity (perceived structural discrimination, negative public regard, success-oriented centrality) at 11th grade, and in turn, academic attitudes and perceptions. Parents’ racial socialization practices were significant predictors of multiple aspects of adolescents’ racial identity in families with high levels of communication, but they did not predict any aspects of adolescents’ racial identity in families with low levels of communication. Results highlight the importance of including family processes when examining the relations between parents’ racial socialization and adolescents’ racial identity and academic attitudes and perceptions. PMID:26369349

  18. Racial Socialization, Racial Identity, and Academic Attitudes Among African American Adolescents: Examining the Moderating Influence of Parent-Adolescent Communication.

    Science.gov (United States)

    Tang, Sandra; McLoyd, Vonnie C; Hallman, Samantha K

    2016-06-01

    A significant gap remains in our understanding of the conditions under which parents' racial socialization has consequences for adolescents' functioning. The present study used longitudinal data to examine whether the frequency of communication between African American parents and adolescents (N = 504; 49 % female) moderates the association between parent reports of racial socialization (i.e., cultural socialization and preparation for bias) at 8th grade and adolescent reports of racial identity (perceived structural discrimination, negative public regard, success-oriented centrality) at 11th grade, and in turn, academic attitudes and perceptions. Parents' racial socialization practices were significant predictors of multiple aspects of adolescents' racial identity in families with high levels of communication, but they did not predict any aspects of adolescents' racial identity in families with low levels of communication. Results highlight the importance of including family processes when examining the relations between parents' racial socialization and adolescents' racial identity and academic attitudes and perceptions.

  19. Dynamics of teacher-student relationships: stability and change across elementary school and the influence on children's academic success.

    Science.gov (United States)

    Spilt, Jantine L; Hughes, Jan N; Wu, Jiun-Yu; Kwok, Oi-Man

    2012-01-01

    This study modeled teacher-student relationship trajectories throughout elementary school to predict gains in achievement in an ethnic-diverse sample of 657 academically at-risk students (mean age = 6.57 years, SD = .39). Teacher reports of warmth and conflict were collected in Grades 1-5. Achievement was tested in Grades 1 and 6. For conflict, low-stable (normative), low-increasing, high-declining, and high-stable trajectories were found. For warmth, high-declining (normative) and low-increasing patterns were found. Children with early behavioral, academic, or social risks were underrepresented in the normative trajectory groups. Chronic conflict was most strongly associated with underachievement. Rising conflict but not declining Conflict coincided with underachievement. The probability of school failure increased as a function of the timing and length of time children were exposed to relational adversity. © 2012 The Authors. Child Development © 2012 Society for Research in Child Development, Inc.

  20. Evolution of American Academic Medicine: A View of Its Contributions to World Medicine and Reflections Influenced by Personal Role Models.

    Science.gov (United States)

    Frohlich, Edward D

    2017-08-01

    The changes in American academic medicine in the last 6 decades has been a success. During these years, I participated in this development through patients care, research, editorship of major Journals and as a member of governing boards of several professional organizations. This discussion will describe some of the developments of medicine and will recount my own professional career and my mentors who help me to achieve my goals. Copyright © 2017. Published by Elsevier Inc.

  1. Surface analysis of the selective excimer laser patterning of a thin PEDOT:PSS film on flexible polymer films

    Science.gov (United States)

    Schaubroeck, David; De Smet, Jelle; Willems, Wouter; Cools, Pieter; De Geyter, Nathalie; Morent, Rino; De Smet, Herbert; Van Steenbeerge, Geert

    2016-07-01

    Fast patterning of highly conductive polymers like PEDOT:PSS (poly (3,4-ethylene dioxythiophene): polystyrene sulfonate) with lasers can contribute to the development of industrial production of liquid crystal displays on polymer foils. In this article, the selective UV laser patterning of a PEDOT:PSS film on flexible polymer films is investigated. Based on their optical properties, three polymer films are investigated: polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) and cellulose triacetate (TAC). Ablation parameters for a 110 nm PEDOT:PSS film on these polymer films are optimized. A detailed study of the crater depth, topography and surface composition are provided using optical profilometry, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The electrical insulation of the lines is measured and correlated to the crater analyses for different laser settings. Finally, potential ablation parameters for each of the polymer films are derived.

  2. Preparation of graphene oxide/poly (3,4-ethylenedioxytriophene): Poly (styrene sulfonate) (PEDOT:PSS) electrospun nanofibers

    Energy Technology Data Exchange (ETDEWEB)

    Efelina, Vita; Widianto, Eri [Department of Physics, Universitas Gadjah Mada, Sekip Utara BLS.21 Yogyakarta, 55281 Indonesia (Indonesia); Rusdiana, Dadi [Department of Physical Education, Universitas Pendidikan Indonesia, Bandung (Indonesia); Nugroho, A. A. [Department of Physics, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung (Indonesia); Kusumaatmaja, Ahmad; Triyana, Kuwat; Santoso, Iman, E-mail: iman.santoso@ugm.ac.id [Department of Physics, Universitas Gadjah Mada, Sekip Utara BLS.21 Yogyakarta, 55281 Indonesia (Indonesia); Nanomaterials Research Group, Universitas Gadjah Mada,, Sekip Utara, Yogyakarta (Indonesia)

    2016-04-19

    Graphene oxide (GO)/Poly (3,4-Ethylenedioxytriophene):Poly (styrene Sulfonate) (PEDOT:PSS) nanofibers have been successfully fabricated by a simple electrospinning technique to develop conductive nanofibers with polyvinyl alcohol (PVA) act as a carrier solution. Graphene oxide has been synthesized by Hummer’s method and has been confirmed by Raman Spectroscopy, FTIR and UV-Vis Spectroscopy. GO/PEDOT:PSS composite nanofibers. The structural and morphological properties were characterized by Scanning Electron Microscopy (SEM). The result of SEM show that GO/PEDOT:PSS nanofibers has a relatively uniform morphology nanofiber with diameter between 180 nm - 340 nm with smooth nanofiber surface. The produced nanofibers from this study can be utilized for various applications such as flexible, conductive and transparent electrode.

  3. Impact of PSS and STATCOM Devices to the Dynamic Performance of a Multi-Machine Power System

    Directory of Open Access Journals (Sweden)

    G. Shahgholian

    2017-12-01

    Full Text Available This paper studies the impact of leveraging both static syn­ch­ron­ous compensator (STATCOM and power system stabilizer (PSS on multi-machine power systems. Considering a sta­ndard IEEE 9-bus test power network, classic and intelligent controllers are applied to achieve the desirable system performance. Simulated tests show the usefulness of STATCOM on network power quality in terms of voltage profile. In addition, it is shown that it can significantly improve the damping oscillations of synchronous generator under normal and abnormal network conditions. As shown, the PSS also contributes to improving the synch­ron­o­u­s generator parameters. It is also observed that using intelligent controllers with STATCOM and PSS leads to a better perfor­ma­nc­e relative to the classic controllers.

  4. The kinesin AtPSS1 promotes synapsis and is required for proper crossover distribution in meiosis.

    Directory of Open Access Journals (Sweden)

    Yann Duroc

    2014-10-01

    Full Text Available Meiotic crossovers (COs shape genetic diversity by mixing homologous chromosomes at each generation. CO distribution is a highly regulated process. CO assurance forces the occurrence of at least one obligatory CO per chromosome pair, CO homeostasis smoothes out the number of COs when faced with variation in precursor number and CO interference keeps multiple COs away from each other along a chromosome. In several organisms, it has been shown that cytoskeleton forces are transduced to the meiotic nucleus via KASH- and SUN-domain proteins, to promote chromosome synapsis and recombination. Here we show that the Arabidopsis kinesin AtPSS1 plays a major role in chromosome synapsis and regulation of CO distribution. In Atpss1 meiotic cells, chromosome axes and DNA double strand breaks (DSBs appear to form normally but only a variable portion of the genome synapses and is competent for CO formation. Some chromosomes fail to form the obligatory CO, while there is an increased CO density in competent regions. However, the total number of COs per cell is unaffected. We further show that the kinesin motor domain of AtPSS1 is required for its meiotic function, and that AtPSS1 interacts directly with WIP1 and WIP2, two KASH-domain proteins. Finally, meiocytes missing AtPSS1 and/or SUN proteins show similar meiotic defects suggesting that AtPSS1 and SUNs act in the same pathway. This suggests that forces produced by the AtPSS1 kinesin and transduced by WIPs/SUNs, are required to authorize complete synapsis and regulate maturation of recombination intermediates into COs. We suggest that a form of homeostasis applies, which maintains the total number of COs per cell even if only a part of the genome is competent for CO formation.

  5. Measurement properties of the Brazilian version of the Penn Shoulder Score (PSS-Brazil): reliability, validity, and responsiveness.

    Science.gov (United States)

    de Souza, Marcela Bembo; Martins, Jaqueline; Hotta, Gisele Harumi; de Oliveira, Anamaria Siriani

    2015-02-01

    Clinical measurement. To determine the reliability, validity, and responsiveness of the Brazilian version of the Penn Shoulder Score (PSS-Brazil) in patients with shoulder dysfunctions. Several questionnaires assessing shoulder dysfunctions are available in Brazil, but the measurement properties of most of them, such as the PSS, have not yet been tested. Internal consistency, measurement error, construct validity, and floor and ceiling effects were evaluated in 62 patients, 36 of whom completed the questionnaire at baseline and after 2 to 7 days to assess test-retest reliability. Responsiveness was determined with 50 patients who completed the questionnaire at an initial visit and after 4 weeks of physical therapy. The PSS-Brazil displayed acceptable internal consistency, with a Cronbach alpha of .92. Test-retest reliability was excellent, with an intraclass correlation coefficient of 0.95; the standard error of measurement and minimal detectable change were 12.8 and 14.4 points, respectively. A high correlation was obtained between the PSS and the Shoulder Pain and Disability Index (0.96) and the Disabilities of the Arm, Shoulder and Hand questionnaire (0.86). There was moderate correlation between the PSS and its subscales and the pain and function subscales of the Medical Outcomes Study 36-Item Short-Form Health Survey (0.40-0.68). There was high responsiveness, with an effect size of 0.95 and standardized response mean of 1.13 for patients with improvement of shoulder dysfunction, and adequate area under the curve of 0.81. No floor or ceiling effects were observed. The PSS-Brazil is a reliable, valid, and responsive measure for assessing patients with shoulder dysfunction.

  6. Academic Blogging: Academic Practice and Academic Identity

    Science.gov (United States)

    Kirkup, Gill

    2010-01-01

    This paper describes a small-scale study which investigates the role of blogging in professional academic practice in higher education. It draws on interviews with a sample of academics (scholars, researchers and teachers) who have blogs and on the author's own reflections on blogging to investigate the function of blogging in academic practice…

  7. Family Economic Stress and Academic Well-Being Among Chinese-American Youth: The Influence of Adolescents’ Perceptions of Economic Strain

    Science.gov (United States)

    Mistry, Rashmita S.; Benner, Aprile D.; Tan, Connie S.; Kim, Su Yeong

    2009-01-01

    This study examined the pathways by which family economic stress influenced youth's educational outcomes in a sample of 444 Chinese American adolescents (Mages = 13.0, 17.1 years at waves 1 and 2, respectively). Using latent variable structural equation modeling, results across two waves of data, spanning early to late adolescence, demonstrated that the influence of parent report of economic stress on youth academic achievement (i.e., GPA), school engagement, and positive attitudes about education was mediated through youth's perceptions of family economic strain and self-reports of depressive symptoms. These relationships were observed to remain significant after accounting for selection bias using individual fixed-effects models. Finally, youth's perceptions of family economic strain were found to more strongly predict depressive symptoms during later, as compared to earlier, adolescence; all other modeled relationships were equivalent across the two time periods. Implications for expanding theoretical tenets of the Family Economic Stress Model are discussed. PMID:19586191

  8. Tradução e adaptação cultural do Penn Shoulder Score para a Língua Portuguesa: PSS-Brasil Translation and cultural adaptation of the Penn Shoulder Score to Portuguese Language: PSS-Brazil

    Directory of Open Access Journals (Sweden)

    Barbara Valente Napoles

    2010-08-01

    Full Text Available INTRODUÇÃO/OBJETIVO: Produzir a versão brasileira do questionário Penn Shoulder Score (PSS, destinado a avaliar a dor, a satisfação e a função dos indivíduos que apresentam condições dolorosas musculoesqueléticas do ombro. PACIENTES E MÉTODOS: O desenvolvimento da versão brasileira do questionário PSS se baseou no protocolo proposto pela American Academy of Orthopaedic Surgeons (AAOS e na International Quality of Life Assessment (IQOLA, sendo constituído pelos estágios de tradução, síntese, retrotradução, revisão pelo Comitê, pré-teste e avaliação dos documentos pelo Comitê e autor do PSS. A versão original passou pelos processos de tradução e retrotradução, e um Comitê de especialistas finalizou a elaboração da versão pré-final do questionário PSS. Essa versão pré-final foi aplicada em uma amostra de noventa indivíduos com diagnóstico clínico de condições dolorosas musculoesqueléticas do ombro, de ambos os sexos e com idade acima de 18 anos. Nas aplicações, os pacientes foram questionados acerca de sua compreensão de cada item, e aqueles não compreendidos por 20% ou mais dos pacientes foram analisados e modificados pelo Comitê, havendo necessidade de três aplicações (n = 30 do questionário. RESULTADOS: A aplicação das versões pré-finais do PSS revelou as dificuldades encontradas pelos pacientes, as quais foram resolvidas pela transformação do questionário autoaplicável em um instrumento aplicado por entrevista. CONCLUSÃO: A tradução e a adaptação cultural geraram a versão brasileira final do questionário PSS.INTRODUCTION/OBJECTIVE: To produce the Brazilian version of Penn Shoulder Score (PSS designated to measure pain, satisfaction, and function of patients with shoulder painful musculoskeletal conditions. PATIENTS AND METHODS: The Brazilian version development of PSS questionnaire was based on the protocol proposed by the American Academy of Orthopaedic Surgeons (AAOS and

  9. Academic Hospitality

    Science.gov (United States)

    Phipps, Alison; Barnett, Ronald

    2007-01-01

    Academic hospitality is a feature of academic life. It takes many forms. It takes material form in the hosting of academics giving papers. It takes epistemological form in the welcome of new ideas. It takes linguistic form in the translation of academic work into other languages, and it takes touristic form through the welcome and generosity with…

  10. FACTORS INFLUENCING STUDENTS UNREST IN INSTITUTIONS OF HIGHER LEARNING AND ITS IMPLICATIONS ON THE ACADEMIC PERFORMANCE OF STUDENTS IN UNIVERSITY OF UYO, AKWA IBOM STATE, NIGERIA

    Directory of Open Access Journals (Sweden)

    Davies K.U

    2016-06-01

    Full Text Available Nigerians have for some time been disturbed by the alarming rate at which students' unrest in Nigerian institutions of higher learning have led to destruction of lives and property and untimely interruption of the planned academic programmes. On the basis of the above exposition, the project examined the concept of students’ unrest, factors that influence students’ unrest and its implication on the academic performance of students. A survey research design was adopted and a fifteen items questionnaire entitled "Factors Influencing Students’ Unrest in Institution of Higher Learning Questionnaire" (FISUIHLQ, was used to collect the data needed for analysis. Percentage, frequency count, and mean model were used to analyze the data collected. Items that fall between 0.50-1.49 mean score were considered Very Low, items that fall between 1.50-2.49 mean score were considered Low, items that fall between 2.50-3.49 mean score were considered Moderate, Items that fall between 3.50-4.49 mean score were considered High, while items that fall between mean scores of 4.50-5.00 were considered Very High. The study, therefore, discovered that breaking of rules and regulations, lack of social amenities and students involvement in cultism were seen as 'high' with mean scores of 2.60, 3.71 and 4.16 respectively, that is, they are serious factors that can influence students unrest in institutions of higher learning. While effective students’ union body and periodic strike by staff of the institution were seen as 'Low' with mean score of 2.21 and 1.96 respectively, that is, they are less serious factors that can influence students’ unrest. Also, it was discovered that disrupts of academic programmes, closure of schools, lecturers not unable to cover syllabus, and brain drain syndrome are the implications of students unrest with mean scores of 3.70,2.84,4.06,2.96 respectively were seen as ‘High’, that is, they are serious implication of students

  11. Influence of Learning Strategies STAD Using Portfolio Assessment and Academic Ability to Concept Training Junior High School Students in Biology Education

    Directory of Open Access Journals (Sweden)

    Puspani Puspani

    2014-06-01

    Full Text Available Pengaruh Strategi Pembelajaran STAD Menggunakan Penilaian Portofolio dan Kemampuan Akademik terhadap Pemahaman Konsep Siswa SMP pada Pembelajaran Biologi Abstract: This study is a quasi-experimental research (quasi experimental which aims to: (1 examine the effect of STAD learning strategies using a portfolio assessment to the understanding of concepts and critical thinking skills, (2 test the effect of academic ability to understanding of concepts and critical thinking skills students, (3 test the interaction effect of STAD strategy using portfolio assessment and academic ability to the understanding of concepts and critical thinking skills of students. Research using the draft "non-pretest-posttest control group design equivalent" version 2x2 factorial. Data analysis to test for normality and homogeneity, followed by analysis of covariance (Anacova and a further test LSD. The study population is class VIII SMPN 12 Balikpapan. Samples are 6 classes determined by random cluster sampling technique. The results showed: (1 there was an effect of STAD strategy using a portfolio assessment to the understanding of concepts and critical thinking skills of students, (2 no influence on the understanding of the concept of academic ability and critical thinking skills of students, (3 there is no interaction effect between strategy STAD using portfolio assessment and academic ability to the understanding of concepts and critical thinking skills of students. Key Words: STAD, portfolios, academic ability, understanding of the concept Abstrak: Penelitian ini merupakan penelitian eksperimen semu (quasi experiment yang bertujuan untuk: (1 menguji pengaruh strategi pembelajaran STAD dengan menggunakan penilaian portofolio terhadap pemahaman konsep dan kemampuan berpikir kritis, (2 menguji pengaruh kemampuan akade-mik terhadap pemahaman konsep dan kemampuan berpikir kritis siswa, (3 menguji pengaruh interaksi strategi pembelajaran STAD dengan menggunakan penilaian

  12. Correlation between the fine structure of spin-coated PEDOT:PSS and the photovoltaic performance of organic/crystalline-silicon heterojunction solar cells

    Energy Technology Data Exchange (ETDEWEB)

    Funda, Shuji; Ohki, Tatsuya; Liu, Qiming; Hossain, Jaker; Ishimaru, Yoshihiro; Ueno, Keiji; Shirai, Hajime [Graduate School of Science and Engineering, Saitama University, Saitama 338-8570 (Japan)

    2016-07-21

    We investigated the relationship between the fine structure of spin-coated conductive polymer poly(3,4-ethylenedioxythiphene):poly(styrene sulfonate) (PEDOT:PSS) films and the photovoltaic performance of PEDOT:PSS crystalline-Si (PEDOT:PSS/c-Si) heterojunction solar cells. Real-time spectroscopic ellipsometry revealed that there were two different time constants for the formation of the PEDOT:PSS network. Upon removal of the polar solvent, the PEDOT:PSS film became optically anisotropic, indicating a conformational change in the PEDOT and PSS chain. Polarized Fourier transform infrared attenuated total reflection absorption spectroscopy and Raman spectroscopy measurements also indicated that thermal annealing promoted an in-plane π-conjugated C{sub α} = C{sub β} configuration attributed to a thiophene ring in PEDOT and an out-of-plane configuration of -SO{sub 3} groups in the PSS chain with increasing composition ratio of oxidized (benzoid) to neutral (quinoid) PEDOT, I{sub qui}/I{sub ben}. The highest power conversion efficiency for the spin-coated PEDOT:PSS/c-Si heterojunction solar cells was 13.3% for I{sub qui}/I{sub ben} = 9–10 without employing any light harvesting methods.

  13. The Factors Influencing Academic Affairs Services Management at the National University of Laos and Lucian Blaga University of Sibiu, Romania

    Directory of Open Access Journals (Sweden)

    Sounieng VONGKHAMCHANH

    2013-12-01

    Full Text Available This research aims are to investigate the attitude levels of staff’s and students’ on the motivation, effectiveness towards the academic affairs services management at the faculty of Economics and Business Management, DongDok campus in the National University of Laos, and the faculty of Economic Sciences and faculty of Sciences, Sibiu campus in Lucian Blaga University of Sibiu, Romania. There were 220 participants, five groups; presidents, deans, heads of departments, lecturers and students. The five-point Likert scale rating questionnaires were used to collect data. The SPSS version 20 was used to perform the needed analysis for reaching the proposed aims. In this regard, univariate and bivariate statistics were computed; Pearson Chi-Square Test, ANOVA, scale reliability and validity analysis were undertaken. The research goals are to improve the academic affairs services management systems in the two mentioned universities. Therefore, the results advised the university committee boards, the governments, the national, international donors, curriculum developers, staff and students to use them for the educational purposes.

  14. How do faculty conceptions on reading, writing and their role in the teaching of academic literacies influence their inclusive attitude

    Directory of Open Access Journals (Sweden)

    Laura Colombo

    2016-09-01

    Full Text Available http://dx.doi.org/10.5007/2175-8026.2016v69n3p115 This study explored faculty conceptions about reading and writing, the student body, reasons for student low-performance as well as their declared teaching practices aimed at helping students to better understand readings and write academic texts. The objective was to understand what type of professors´ conceptions contributed with a more inclusive attitude towards first-year students. Content analysis from data gathered from in-depth interviews indicates that professors who acknowledged the complexity of the reading and writing processes tend to be more inclusive and to use reading and writing to teach and not just to evaluate. Those who taught writing courses tended to consider writing as a general skill, transferable to other contexts and spheres of knowledge. Less-inclusive teachers, explaining why they did not offer guidance or proposed remedial solutions, claimed that students should already have mastered academic reading and writing when entering the university and that teaching these skills implied being overprotective and not allowing them to mature.

  15. How do faculty conceptions on reading, writing and their role in the teaching of academic literacies influence their inclusive attitude

    Directory of Open Access Journals (Sweden)

    Laura Colombo

    2016-09-01

    Full Text Available This study explored faculty conceptions about reading and writing, the student body, reasons for student low-performance as well as their declared teaching practices aimed at helping students to better understand readings and write academic texts. The objective was to understand what type of professors´ conceptions contributed with a more inclusive attitude towards first-year students. Content analysis from data gathered from in-depth interviews indicates that professors who acknowledged the complexity of the reading and writing processes tend to be more inclusive and to use reading and writing to teach and not just to evaluate. Those who taught writing courses tended to consider writing as a general skill, transferable to other contexts and spheres of knowledge. Less-inclusive teachers, explaining why they did not offer guidance or proposed remedial solutions, claimed that students should already have mastered academic reading and writing when entering the university and that teaching these skills implied being overprotective and not allowing them to mature.

  16. Towards assessing Product/Service Systems (PSS) within the Danish Maritime Industry

    DEFF Research Database (Denmark)

    Hsuan, Juliana; Andersen, Jakob B.; Bey, Niki

    2012-01-01

    their position in terms of the balance between product-related and service-related activities. Judging from a workshop carried out with companies from the marine industry and researchers in the are, the approach seems promising, but requires imporements on questionnaire and Matrix. These need to incorporate...... further improvements regarding the factor of time and the applicability related to product/service portfolios, as opposed to single product/services. The authors already plan further research on the identified issues.......In response to requirements resulting from a changing business landscape from solely physical-product-based value creation towards perfoprmance-based value creation, this paper presents a questionaire-based matrix, the PSS Categorization Matric, that is developed in order to help organizations find...

  17. Synthesis of Continuous Conductive PEDOT:PSS Nanofibers by Electrospinning: A Conformal Coating for Optoelectronics.

    Science.gov (United States)

    Bessaire, Bastien; Mathieu, Maillard; Salles, Vincent; Yeghoyan, Taguhi; Celle, Caroline; Simonato, Jean-Pierre; Brioude, Arnaud

    2017-01-11

    A process to synthesize continuous conducting nanofibers were developed using PEDOT:PSS as a conducting polymer and an electrospinning method. Experimental parameters were carefully explored to achieve reproducible conductive nanofibers synthesis in large quantities. In particular, relative humidity during the electrospinning process was proven to be of critical importance, as well as doping post-treatment involving glycols and alcohols. The synthesized fibers were assembled as a mat on glass substrates, forming a conductive and transparent electrode and their optoelectronic have been fully characterized. This method produces a conformable conductive and transparent coating that is well-adapted to nonplanar surfaces, having very large aspect ratio features. A demonstration of this property was made using surfaces having deep trenches and high steps, where conventional transparent conductive materials fail because of a lack of conformability.

  18. Spray coated indium-tin-oxide-free organic photodiodes with PEDOT:PSS anodes

    Directory of Open Access Journals (Sweden)

    Morten Schmidt

    2014-10-01

    Full Text Available In this paper we report on Indium Tin Oxide (ITO-free spray coated organic photodiodes with an active layer consisting of a poly(3-hexylthiophen (P3HT and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM blend and patterned poly(3,4-ethylenedioxythiophene:poly(styrenesulfonate (PEDOT:PSS electrodes. External quantum efficiency and current voltage characteristics under illuminated and dark conditions as well as cut-off frequencies for devices with varying active and hole conducting layer thicknesses were measured in order to characterize the fabricated devices. 60% quantum efficiency as well as nearly four orders of magnitude on-off ratios have been achieved. Those values are comparable with standard ITO devices.

  19. Structural and optical behavior of thin films of protein (BSA)-Polyelectrolyte (PAA, PSS) complexes

    Science.gov (United States)

    Talukdar, Hrishikesh; Kundu, Sarathi

    2017-05-01

    Optical behaviors of protein (BSA) in the presence of negatively charged polyelectrolytes (PAA and PSS) in thin film confirmation are studied using UV-Vis and photoluminescence spectroscopy. The out-of-plane structures and in-plane surface morphologies of the thin films of protein-polyelectrolyte complexes (PPC) are investigated using X-ray reflectivity (XRR) and Atomic force microscopy (AFM) respectively. It is found that although the out-of-plane structure and surface morphology of PPC is nearly same as in pure polyelectrolyte but a larger red-shift of ≈ 23 nm is obtained in optical emissions from the thin films of PPC in comparison with that of the pure protein and PPC solutions. Mechanism is proposed for such larger red-shift from the thin film of PPC.

  20. Magneto-Seebeck effect in an ITO/PEDOT:PSS/Au thin-film device

    Directory of Open Access Journals (Sweden)

    Hongfeng Wang

    2016-04-01

    Full Text Available This article reports giant magnetic field effects on the Seebeck coefficient by exerting a Lorentz force on charge diffusion based on vertical multi-layer ITO/PEDOT:PSS/Au thin-film devices. The Lorentz force, induced by an external magnetic field, changes the charge transport and consequently generates angular dependent magnetoresistance. The proposed mechanism of the magneto-Seebeck effect is proved by measuring the magnetoresistance at a parallel, 45o and perpendicular angle to the temperature gradient. The gradual change of the magnetoresistance from a parallel to perpendicular angle indicates that the Lorentz force is a key driving force to develop the magneto-Seebeck effect. Therefore, our experimental results demonstrate a magnetic approach to control the thermoelectric properties in organic materials.

  1. Effect of bismuth telluride concentration on the thermoelectric properties of PEDOT:PSS-glycerol organic films

    Science.gov (United States)

    Rahman, Airul Azha Abd; Ali Umar, Akrajas; Othman, Mohamad Habrul Ulum

    2015-02-01

    In this work, the effect of bismuth-telluride concentration on the thermoelectric properties of PEDOT:PSS-Glycerol thin films is investigated. A thermoelectric device was fabricated by depositing the n-type and the p-type Bi2Te3 (BT) doped-PEDOT:PSS-Glycerol on a glass substrate via a spin coating method at 500 rpm. Room-temperature electrical properties characterization shows that the electrical conductivity of both type thin film increases with increasing of BT doping concentration and optimum at concentration of 0.8 wt% for both p-type and n-type thin films, i.e. 17.9 S/cm and 7.78 S/cm, respectively. However, the study of the temperature effect on the thin films electrical conductivity suggested that the thermoelectric properties of both types' samples improved with increasing of BT concentration and optimum at 0.8 and 0.6 wt% for p-type and n-type thin films, respectively. It then decreased if the BT concentration further increased. The Sebeeck coefficient for these samples is as high as -11.9 and -15.7 uV/K, which is equivalent to a power factors of 0.26 and 0.19 μS V2/ (m K2), respectively. A thermoelectric device resembling a thermocouple system that was fabricated using the optimum p-type and n-type thin films can generate a voltage as high as 1.1 V at a temperature difference as low as 55 K, which is equivalent to a maximum power of 6.026 μW at Vmax.power of 0.5489 V (for an estimated matched-load of 50 Ω). The present materials system is potential for powering low power consumption electronic devices.

  2. The Role of Academic Self-Efficacy as a Mediator Variable between Perceived Academic Climate and Academic Performance

    Science.gov (United States)

    Abd-Elmotaleb, Moustafa; Saha, Sudhir K.

    2013-01-01

    This study examines the mediating influence of academic self-efficacy on the link between perceived academic climate and academic performance among university students. The participants in the study consist of 272 undergraduate students at the University of Assiut, Assiut, Egypt. A scale to measure perceived academic climate, was developed. To…

  3. Handheld and automated ultrasonic spray deposition of conductive PEDOT:PSS films and their application in AC EL devices

    NARCIS (Netherlands)

    Ely, Fernando; Matsumoto, Agatha; Zoetebier, Bram; Peressinotto, Valdirene S.; Hirata, Marcelo Kioshi; de Sousa, Douglas A.; Maciel, Rubens

    2014-01-01

    In this contribution we explore the spray deposition technique to achieve smooth films based on the conductive polymer PEDOT:PSS. Two different spray systems were used and compared namely: (a) handheld airbrush and (b) automated ultrasonic spray system. For each system a number of parameters were

  4. Low turn-on voltage perovskite light-emitting diodes with methanol treated PEDOT:PSS as hole transport layer

    Science.gov (United States)

    Wang, Zijun; Li, Zhirun; Zhou, Dianli; Yu, Junsheng

    2017-12-01

    We demonstrate the reduced low turn-on voltage of perovskite light-emitting diodes (PeLEDs) with methanol (MeOH) treated poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) as a hole transport layer (HTL). The MeOH treated PEDOT:PSS layer presents improved hole injection through reducing the contact barrier between the HTL and the CH3NH3PbBr3 emitting layer without sacrificing the quality of the perovskite film, which was characterized by X-ray diffraction, scanning electron microscopy, and time-resolved photoluminescence analysis. The optimized PeLEDs with the MeOH treated PEDOT:PSS layer exhibit a low turn-on voltage of 2.4 V and a maximum luminance of 1565 cd/m2, which represents a significant improvement over the PeLEDs using a pristine PEDOT:PSS layer. The approach could be used as a general method for decreasing the hole-injection barrier of PeLEDs and, eventually, to enhance the device performance.

  5. Graphene oxide/PEDOT:PSS composite hole transport layer for efficient and stable planar heterojunction perovskite solar cells

    Science.gov (United States)

    Lee, Da-Young; Na, Seok-In; Kim, Seok-Soon

    2016-01-01

    We investigated a graphene oxide (GO)/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) composite as a promising candidate for the practical application of a 2-D carbonaceous hole transport layer (HTL) to planar heterojunction perovskite solar cells (PeSCs) consisting of a transparent electrode/HTL/perovskite/fullerene/metal electrode. Both the insulating properties of GO and the non-uniform coating of the transparent electrode with GO cause the poor morphology of perovskite induced low power conversion efficiency (PCE) of 6.4%. On the other hand, PeSCs with a GO/PEDOT:PSS composite HTL, exhibited a higher PCE of 9.7% than that of a device fabricated with conventional PEDOT:PSS showing a PCE of 8.2%. The higher performance is attributed to the decreased series resistance (RS) and increased shunt resistance (RSh). The well-matched work-function between GO (4.9 eV) and PEDOT:PSS (5.1 eV) probably results in more efficient charge transport and an overall decrease in RS. The existence of GO with a large bandgap of ~3.6 eV might induce the effective blocking of electrons, leading to an increase of RSh. Moreover, improvement in the long-term stability under atmospheric conditions was observed.

  6. Flexible nonvolatile memory devices based on Au/PMMA nanocomposites deposited on PEDOT:PSS/Ag nanowire hybrid electrodes

    Science.gov (United States)

    Sung, Sihyun; Kim, Tae Whan

    2017-07-01

    Flexible nonvolatile memory (NVM) devices fabricated utilizing Au nanoparticles (AuNPs) embedded in a poly(methylmethacrylate) (PMMA) layer were fabricated on a silver nanowire (AgNW) or a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/AgNW coated on poly(ethylene terephthalate) (PET) substrates. The transmittance and the sheet resistance of the PEDOT:PSS/AgNW hybrid layer were approximately 89% and 50 Ω/sq, respectively, which were comparable to the values for commercial indium-tin-oxide (ITO) electrodes. Current-voltage curves for the Al/PMMA:AuNP/PEDOT:PSS/AgNW/PET devices at 300 K showed clockwise current hysteresis behaviors due to the existence of the AuNPs. The endurance number of ON/OFF switching for the NVM devices was above 30 cycles. An ON/OFF ratio of 1 × 103 was maintained for retention times longer than 1 × 104 s. The maximum memory margins of the NVM devices before and after bending were approximately 3.4 × 103 and 1.4 × 103, respectively. The retention times of the devices before and after bending remained same 1 × 104 s. The memory margin and the stability of flexible NVMs fabricated on AgNW electrodes were enhanced due to the embedded PEDOT:PSS buffer layer.

  7. High performance silicon–organic hybrid solar cells via improving conductivity of PEDOT:PSS with reduced graphene oxide

    Energy Technology Data Exchange (ETDEWEB)

    Jiang, Xinyu; Wang, Zilei; Han, Wenhui; Liu, Qiming; Lu, Shuqi; Wen, Yuxiang [School of Physical Science and Technology, Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China); Hou, Juan [School of Science, Key Laboratory of Ecophysics, Shihezi University, Xinjiang 832003 (China); Huang, Fei [Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195-2120 (United States); Peng, Shanglong, E-mail: pengshl@lzu.edu.cn [School of Physical Science and Technology, Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China); He, Deyan [School of Physical Science and Technology, Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China); Cao, Guozhong, E-mail: gzcao@u.washington.edu [Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195-2120 (United States)

    2017-06-15

    Highlights: • The fabricated Si–organic hybrid solar cells with 2 mg/ml rGO addition yielded a power conversion efficiency of 11.95% with a J{sub sc} of 31.94 mA cm{sup −2}, a V{sub oc} of 579 mV and a FF of 0.648, about 27.8% increase from 9.35% in pristine hybrid solar cells. • The electrical conductivity of PEDOT:PSS improved 35% when appropriate amount rGO was added to PEDOT:PSS, the electron recombination at the junction interface of the device was suppressed by the appropriate amount rGO flakes addition. • The rGO flakes also serve as an antireflection coating to further reduce the reflectance in the wavelength range of 300–550 nm, leading to further enhanced performances of hybrid solar cells. - Abstract: The optical and electrical properties of PEDOT:PSS organic layer play a very important role in determining the power conversion efficiency (PCE) of Si–organic hybrid solar cells (HSCs). In the present study, properties of PEDOT:PSS thin films with reduced graphene oxide (rGO) and their impacts on the performances of the resultant Si–organic HSCs have been systematically investigated. The electrical conductivity of PEDOT:PSS improved 35% when rGO was added to PEDOT:PSS, and the fabricated HSCs with 2 mg/ml rGO addition yielded an PCE of 11.95% with a J{sub sc} of 31.94 mA cm{sup −2}, a V{sub oc} of 579 mV and a FF of 0.648. However, excess rGO would deteriorate the solar cells performances and it might create additional defects and prevent carriers being collected. The Raman spectroscopy, sheet resistance and EQE analyses with rGO suggested that the interaction between the conductive rGO flakes and the aromatic PEDOT most probably not only provide additional charge transport pathways in hole transport layer to improve carrier mobility leading to a higher carrier collection efficiency, but also suppress the electron recombination at the junction interface. In addition, the rGO serve as an antireflection coating to reduce the reflectance of

  8. BIOCHEMISTRY ACADEMIC MONITORING: IT’S INFLUENCE ON TEACHING BACKGROUND AS A TEACHING-LEARNING PRACTICE COMPLEMENT TOOL

    Directory of Open Access Journals (Sweden)

    S. H.D. Ribeiro

    2015-08-01

    Full Text Available The monitoring process is based on a strategy which propitiates interdisciplinary and gathering theory and practice, apart from teaching assistance, easing and increasing students learning, awakening the academic discipline’s interest and importance. The developed task held over the course of two academic consecutive semesters in 2014 on Biology Science Major at Federal University of Uberlândia had as a goal the use of diverse methodological alternatives in Biochemistry such as: basic bibliography’s comprehension support, approaching and integration mechanism from the content to learner’s reality, meetings to feedback pre-assessment valuation, constructive debates, conceptual issues and questioning in order to clarify any doubts from the content discussed, besides the supervisor’s assistance in practical classes. The resources used to this approach were the student’s analysis to monitoring, their performances on the subject and the approval, retention and evasion levels at the end of the semesters. The obtained results have shown a high level of approval on both semesters, combined to decreasing level of evasion and retention. It was possible to clarify that on the discipline´s development the increasing search for monitoring as much as the complexity´s raise from some contents as the interest and curiosity in knowing certain methods used in monitoring. Improving on student´s performance and arguing on written evaluation also were noticed. The obtained results also proved that diverse methodological alternatives in Biochemistry are potential strategies in maximizing the approval levels in that discipline and bring the student close to the content in a dynamic way, supporting to a better knowledge development in the subject. Monitoring can also be a mean to stimulate the interest in teaching.

  9. Academics respond

    DEFF Research Database (Denmark)

    Hazel, Spencer

    2015-01-01

    Contribution to the article "Academics respond: Brexit would weaken UK university research and funding", Guardian Witness, The Guardian, UK......Contribution to the article "Academics respond: Brexit would weaken UK university research and funding", Guardian Witness, The Guardian, UK...

  10. Academic Jibberish

    Science.gov (United States)

    Krashen, Stephen

    2012-01-01

    In this article, the author talks about academic jibberish. Alfie Kohn states that a great deal of academic writing is incomprehensible even to others in the same area of scholarship. Academic Jibberish may score points for the writer but does not help research or practice. The author discusses jibberish as a career strategy that impresses those…

  11. The Use Frequency of 10 Different Methods for Preventing and Detecting Academic Dishonesty and the Factors Influencing Their Use

    Science.gov (United States)

    Sattler, Sebastian; Wiegel, Constantin; van Veen, Floris

    2017-01-01

    This study examines the use frequency by German faculty of 10 different methods for preventing and detecting cheating on exams, plagiarism, and falsification and/or fabrication of data. It also investigates the factors influencing their use. In total, 3,655 faculty members from 55 randomly chosen disciplines at 4 German universities were contacted…

  12. Affective and neuroendocrine stress reactivity to an academic examination: influence of the 5-HTTLPR genotype and trait neuroticism.

    Science.gov (United States)

    Verschoor, Ellen; Markus, C Rob

    2011-07-01

    The current study examined the singular and interactive effects of the 5-HTTLPR genotype and trait neuroticism on affective and physiological stress responses to an academic examination in healthy undergraduate students. From 771 students, 46 short/short (S/S)-allele carriers and 48 long/long (L/L)-allele carriers with the lowest and the highest neuroticism scores (80 females, 14 males; mean age±SD: 20.3±1.7 years) were selected. Salivary cortisol concentrations, mood and perceived stress were assessed before and after a 2-h written examination and compared with a control day. Negative mood, perceived stress and cortisol significantly increased during the examination compared to the control day. Negative stress effects on mood and perceived stress were significantly larger for S/S-allele carriers compared to L/L-allele carriers, regardless of trait neuroticism. Since vulnerability to real-life stressors is an important risk factor for depression pathogenesis, this may be a mediating factor making S/S-allele carriers more susceptible for depression symptoms. Copyright © 2011 Elsevier B.V. All rights reserved.

  13. Humour as a moderator of the relationship between academic expectancy stress and academic self-concept

    OpenAIRE

    2015-01-01

    M.A. (Counselling Psychology) A correlation between academic achievement and academic self-concept has been well established during past studies. Academic self-concept may be influenced by the experience of academic stress, especially academic expectancy stress which is stress derived from the expectations of the self and significant others. With debilitating effects that academic expectancy stress may have on students, interventions need to be put in place to assist students in coping wit...

  14. PEDOT:PSS Films with Metallic Conductivity through a Treatment with Common Organic Solutions of Organic Salts and Their Application as a Transparent Electrode of Polymer Solar Cells.

    Science.gov (United States)

    Yu, Zhimeng; Xia, Yijie; Du, Donghe; Ouyang, Jianyong

    2016-05-11

    A transparent electrode is an indispensable component of optoelectronic devices, and there as been a search for substitutes of indium tin oxide (ITO) as the transparent electrode. Poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) ( PSS) is a conducting polymer that is very promising as the next generation of materials for the transparent electrode if it can obtain conductivity as high as that of ITO. Here, we report the treatment of PSS with organic solutions to significantly enhance its conductivity. Common organic solvents like dimethylformamide and γ-butyrolactone and common organic salts like methylammonium iodide and methylammonium bromide are used for the organic solutions. The conductivity of pristine PSS films is only ∼0.2 S/cm, and it can be increased to higher than 2100 S/cm. The conductivity enhancement is much more significant than control treatments of PSS films with neat organic solvents or aqueous solutions of the organic salts. The mechanism for the conductivity enhancement is the synergetic effects of both the organic salts and organic solvents on the microstructure and composition of PSS. They induce the segregation of some PSSH chains from PSS. Highly conductive PSS films were studied as the transparent electrode of polymer solar cells. The photovoltaic efficiency is comparable to that with an ITO transparent electrode.

  15. Fabrication of flexible conductive films derived from poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonic acid) (PEDOT:PSS) on the nonwoven fabrics substrate

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Chieh-Han [Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan, ROC (China); Shen, Hsiu-Ping [Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC (China); Don, Trong-Ming, E-mail: tmdon@mail.tku.edu.tw [Department of Chemical and Materials Engineering, Tamkang University, New Taipei 251, Taiwan, ROC (China); Chiu, Wen-Yen, E-mail: ycchiu@ntu.edu.tw [Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan, ROC (China); Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC (China); Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan, ROC (China)

    2013-12-16

    In this research, conducting poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonic acid) (PEDOT:PSS) aqueous dispersion was synthesized at first via chemical oxidative polymerization and followed by mixing it with poly(styrene-r-butyl acrylate) P(St-BA) aqueous latex, creating a conductive material with outstanding stretchability. The elastic conductive composite were then film formed on the glass and poly(ethylene terephthalate) (PET) nonwoven fabric substrate by spin coating and dip coating, respectively. Composite films with various contents of PEDOT:PSS polymer (10–100 wt.%) had been prepared. From the conductivity measurements, the conductivity was still kept as high as 88 S cm{sup −1} even the PEDOT:PSS content was lowered to 10 wt.%. Furthermore, the elasticity of conductive films on the PET-nonwoven fabric substrate was evaluated by the 180° bending test repeating 100 times. With introducing soft P(St-BA) material in the PEDOT:PSS phase, the surface resistance increased merely 3–6 times after bending 100 times, while the surface resistance for pure PEDOT:PSS film could reach 18–20 times. - Highlights: • Flexible PEDOT:PSS based material had been coated on the PET-nonwoven fabrics. • The integrity of conductive circuit on fabrics was evaluated by bending test. • With adding rubbery material, the flexibility of PEDOT:PSS coating was enhanced.

  16. Video Games Do Indeed Influence Children and Adolescents' Aggression, Prosocial Behavior, and Academic Performance: A Clearer Reading of Ferguson (2015).

    Science.gov (United States)

    Boxer, Paul; Groves, Christopher L; Docherty, Meagan

    2015-09-01

    Psychological scientists have long sought to determine the relative impact of environmental influences over development and behavior in comparison with the impact of personal, dispositional, or genetic influences. This has included significant interest in the role played by media in children's development with a good deal of emphasis on how violent media spark and shape aggressive behavior in children and adolescents. Despite a variety of methodological weaknesses in his meta-analysis, Ferguson (2015, this issue) presents evidence to support the positive association between violent media consumption and a number of poor developmental outcomes. In this Commentary we discuss this meta-analytic work and how it fits into a broader understanding of human development. © The Author(s) 2015.

  17. Review of Recent Research (1998-2012) in German for Academic Purposes (GAP) in Comparison with English for Academic Purposes (EAP): Cross-Influences, Synergies and Implications for Further Research

    Science.gov (United States)

    Jaworska, Sylvia

    2015-01-01

    This state-of-the-art review reports on the major studies conducted in the field of "Deutsch als Wissenschaftssprache" (academic German) since the late 1990s. To begin with, the current position of German as a language of academic communication nationally and internationally will be discussed, focusing especially on the challenges posed…

  18. Flexible nonvolatile memory devices based on Au/PMMA nanocomposites deposited on PEDOT:PSS/Ag nanowire hybrid electrodes

    Energy Technology Data Exchange (ETDEWEB)

    Sung, Sihyun; Kim, Tae Whan, E-mail: twk@hanyang.ac.kr

    2017-07-31

    Highlights: • Flexible nonvolatile memory (NVM) devices fabricated utilizing Au nanoparticles (AuNPs) embedded in a PMMA layer were fabricated. • The insertion of the PEDOT:PSS layer enhanced the surface uniformity of the AgNW bottom electrode, resulting in improved device performances. • Current-voltage curves for the Al/PMMA:AuNP/PEDOT:PSS/AgNW/PET devices showed clockwise current hysteresis behaviors. • ON/OFF ratio of 1 × 10{sup 3} was maintained for retention times longer than 1 × 10{sup 4} s. • Memory characteristics of the NVM devices before and after bending were similar. - Abstract: Flexible nonvolatile memory (NVM) devices fabricated utilizing Au nanoparticles (AuNPs) embedded in a poly(methylmethacrylate) (PMMA) layer were fabricated on a silver nanowire (AgNW) or a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/AgNW coated on poly(ethylene terephthalate) (PET) substrates. The transmittance and the sheet resistance of the PEDOT:PSS/AgNW hybrid layer were approximately 89% and 50 Ω/sq, respectively, which were comparable to the values for commercial indium-tin-oxide (ITO) electrodes. Current-voltage curves for the Al/PMMA:AuNP/PEDOT:PSS/AgNW/PET devices at 300 K showed clockwise current hysteresis behaviors due to the existence of the AuNPs. The endurance number of ON/OFF switching for the NVM devices was above 30 cycles. An ON/OFF ratio of 1 × 10{sup 3} was maintained for retention times longer than 1 × 10{sup 4} s. The maximum memory margins of the NVM devices before and after bending were approximately 3.4 × 10{sup 3} and 1.4 × 10{sup 3}, respectively. The retention times of the devices before and after bending remained same 1 × 10{sup 4} s. The memory margin and the stability of flexible NVMs fabricated on AgNW electrodes were enhanced due to the embedded PEDOT:PSS buffer layer.

  19. The influence of gender and academic training int he entrepreneurial intention of physical activity and sport sciences students

    Directory of Open Access Journals (Sweden)

    María Huertas González Serrano

    2016-06-01

    Full Text Available Purpose: The objective of this article is to know if there are differences in the variables that explain the entrepreneurial intention of the Physical Activity and Sport Science students addressing academic training and gender of them. Design/methodology/approach: To know entrepreneurial intentions and the different variables related to entrepreneurship, a questionnaire previously validated was used. The questionnaire was provided to 578 students pre-graduated (1st-4th course and post-graduate of Physical Activity and Sport Science degree of Valencia. Findings: Statistically significant differences (p ≤ 0.05 in the variables that predict entrepreneurial intention of Physical Activity and Sport Science students by gender and training were found. In both genders, the attitude towards entrepreneurship and the perceived behavior control were the predictors of entrepreneurial intentions and in men also the subjective norms. Research limitations/implications: The students sample belongs only to the Physical Activity and Sport Science degree of Valencia, so the results cannot be extrapolated to the entire population. Practical implications: It should be developing the attitude toward the behavior of entrepreneurship and perceived behavioral control to promote entrepreneurship. In this way, the graduates will be more prepare for insertion into the working world. Social implications: To increase the number of entrepreneurs (male and female in the sports sector throughout the education, reducing the gender gap in entrepreneurship and improve the quality of entrepreneurship, as this is a key issue because of the positive impact that this phenomenon generates on the economy Originality/value: It is interesting to know the predictor variables of entrepreneurial intentions, and to know if there are differences based on education and gender due to the massive entry of women into the sport workplaces and low intention to undertake of the. So it is quite

  20. Do Angry Birds Make for Angry Children? A Meta-Analysis of Video Game Influences on Children's and Adolescents' Aggression, Mental Health, Prosocial Behavior, and Academic Performance.

    Science.gov (United States)

    Ferguson, Christopher J

    2015-09-01

    The issue of whether video games-violent or nonviolent-"harm" children and adolescents continues to be hotly contested in the scientific community, among politicians, and in the general public. To date, researchers have focused on college student samples in most studies on video games, often with poorly standardized outcome measures. To answer questions about harm to minors, these studies are arguably not very illuminating. In the current analysis, I sought to address this gap by focusing on studies of video game influences on child and adolescent samples. The effects of overall video game use and exposure to violent video games specifically were considered, although this was not an analysis of pathological game use. Overall, results from 101 studies suggest that video game influences on increased aggression (r = .06), reduced prosocial behavior (r = .04), reduced academic performance (r = -.01), depressive symptoms (r = .04), and attention deficit symptoms (r = .03) are minimal. Issues related to researchers' degrees of freedom and citation bias also continue to be common problems for the field. Publication bias remains a problem for studies of aggression. Recommendations are given on how research may be improved and how the psychological community should address video games from a public health perspective. © The Author(s) 2015.

  1. Computer Anxiety, Academic Stress, and Academic Procrastination on College Students

    Directory of Open Access Journals (Sweden)

    Wahyu Rahardjo

    2013-01-01

    Full Text Available Academic procrastination is fairly and commonly found among college students. The lack of understanding in making the best use of computer technology may lead to anxiety in terms of operating computer hence cause postponement in completing course assignments related to computer operation. On the other hand, failure in achieving certain academic targets as expected by parents and/or the students themselves also makes students less focused and leads to tendency of postponing many completions of course assignments. The aim of this research is to investigate contribution of anxiety in operating computer and academic stress toward procrastination on students. As much as 65 students majoring in psychology became participants in this study. The results showed that anxiety in operating computer and academic stress play significant role in influencing academic procrastination among social sciences students. In terms of academic procrastination tendencies, anxiety in operating computer and academic stress, male students have higher percentage than female students.

  2. Validez concurrente de la versión mexicana de las escalas de Apoyo Social Percibido de la Familia y los Amigos (PSS-Fa y PSS-Fr

    Directory of Open Access Journals (Sweden)

    Alejandra del Carmen Domínguez Espinosa

    2011-01-01

    Full Text Available El presente estudio tuvo como objetivo probar las cualidades psicométricas de las escalas PSS-Fa y PSS-Fr (Procidano & Heller, 1983, obteniendo su validez concurrente. El estudio se llevó a cabo en estudiantes mexicanos de nivel universitario con edades de 18 a 31 años. Se calcularon las correlaciones de las escalas de interés con otras variables teóricamente vinculadas al Apoyo Social Percibido como Estrés Percibido (PSS, Optimismo (LOT-R O, Pesimismo (LOT-R P, Estilos de Apego (RQ, Satisfacción en la Vida (SWLS, Número de la red de Apoyo y Satisfacción con la red de apoyo (SSQ6-N y SSQ6-S, Afecto Positivo y Negativo (PANAS-AP y AN, y Deseabilidad Social como variable de control (MC-SDS. También se realizaroncomparaciones entre los extremos alto y bajo en apoyo social, y se encontraron diferencias significativas en algunas de las variables criterio. Se concluye que las escalas cuentan con evidencia empírica de su adecuada validez convergente y divergente y su poder discriminante para medir el apoyo social percibido.

  3. Discerning and Addressing Environmental Failures in Policy Scenarios Using Planning Support System (PSS Technologies

    Directory of Open Access Journals (Sweden)

    Brian Deal

    2016-12-01

    Full Text Available The environmental consequences of planning decisions are often undervalued. This can result from a number of potential causes: (a there might be a lack of adequate information to correctly assess environmental consequences; (b stakeholders might discount the spatial and temporal impacts; (c a failure to understand the dynamic interactions between socio-ecological systems including secondary and tertiary response mechanisms; or (d the gravity of the status quo, i.e., blindly following a traditional discourse. In this paper, we argue that a Planning Support System (PSS that enhances an assessment of environmental impacts and is integral to a community or regional planning process can help reveal the true environmental implications of scenario planning decisions, and thus improve communal planning and decision-making. We demonstrate our ideas through our experiences developing and deploying one such PSS—the Land-use Evolution and impact Assessment Model (LEAM Planning Support System. University of Illinois researchers have worked directly with government planning officials and community stakeholders to analyze alternate future development scenarios and improve the planning process through a participatory, iterative process of visioning, model tuning, simulation, and discussion. The resulting information enables an evaluation of alternative policy or investment choices and their potential environmental implications that can change the way communities both generate and use plans.

  4. A new LPV modeling approach using PCA-based parameter set mapping to design a PSS.

    Science.gov (United States)

    Jabali, Mohammad B Abolhasani; Kazemi, Mohammad H

    2017-01-01

    This paper presents a new methodology for the modeling and control of power systems based on an uncertain polytopic linear parameter-varying (LPV) approach using parameter set mapping with principle component analysis (PCA). An LPV representation of the power system dynamics is generated by linearization of its differential-algebraic equations about the transient operating points for some given specific faults containing the system nonlinear properties. The time response of the output signal in the transient state plays the role of the scheduling signal that is used to construct the LPV model. A set of sample points of the dynamic response is formed to generate an initial LPV model. PCA-based parameter set mapping is used to reduce the number of models and generate a reduced LPV model. This model is used to design a robust pole placement controller to assign the poles of the power system in a linear matrix inequality (LMI) region, such that the response of the power system has a proper damping ratio for all of the different oscillation modes. The proposed scheme is applied to controller synthesis of a power system stabilizer, and its performance is compared with a tuned standard conventional PSS using nonlinear simulation of a multi-machine power network. The results under various conditions show the robust performance of the proposed controller.

  5. Charge carrier recombination in the ITO/PEDOT:PSS/MEH-PPV/Al photodetector

    Directory of Open Access Journals (Sweden)

    Petrović Jovana P.

    2009-01-01

    Full Text Available In this paper we investigate charge carrier recombination processes in polymer based photodetector ITO/PEDOT:PSS/MEH-PPV/Al. The major carriers are the hole polarons created by the photoexcitation in the active MEH-PPV film. The model used in this paper is based on the continuity equation and drift-diffusion equation for hole polarons. We assume the Poole-Frenkel expression for field dependence of the hole polaron mobility. The internal quantum efficiency dependence on incident photon flux density, incident light wavelength and applied electric field is included in the model. The simulated photocurrent density spectra for two different, assumed, recombination mechanisms, linear (monomolecular and square (bimolecular is compared with our experimental results. The bimolecular recombination mechanism applied in our model is assumed to be of Langevin type. The agreement between the measured and the calculated data unambiguously indicate that the hole polaron recombination mechanism in the MEH-PPV film is bimolecular with bimolecular rate constant depending on the external electric field. For the established recombination mechanism the theoretical prediction of the photocurrent density spectra shows excellent agreement with the measured spectra in wide range of inverse bias voltages (from 0 to -8 V.

  6. Enhancement in electrical properties of ITO/PEDOT:PSS/PTCDA/Ag by using calcium buffer layer

    Energy Technology Data Exchange (ETDEWEB)

    Tahir, Muhammad [Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology Topi, KPK 23640 (Pakistan); Department of Physics, Abdul Wali Khan University Mardan, 23200 KPK (Pakistan); Hassan Sayyad, Muhammad [Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology Topi, KPK 23640 (Pakistan); Wahab, Fazal [Department of Physics, Abdul Wali Khan University Mardan, 23200 KPK (Pakistan); Aziz, Fakhra, E-mail: fakhra69@yahoo.com [Department of Electronics, Jinnah College for Women, University of Peshawar, Peshawar 25120 (Pakistan); Ullah, Irfan; Khan, Gulzar [Department of Physics, Abdul Wali Khan University Mardan, 23200 KPK (Pakistan)

    2015-06-15

    This paper reports on electrical characterization of ITO/PEDOT:PSS/PTCDA/Ca/Ag device based on 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) and calcium (Ca) buffer layer with improved junction properties. The I–V characteristics have been utilized to extract various electrical parameters such as ideality factor (n), barrier height (ϕ{sub B}) and series resistance R{sub s}, which are found to be 1.9, 0.79 eV and 2.5 kΩ, respectively. The device shows good rectifying behavior, with a rectification ratio of 528, and also field-lowering mechanism with a linear dependence of log I on V{sup 1/2}. The device reported in the present work shows 50% improvement in the rectification ratio and ideality factor as compared to our previously fabricated device. It appears from the experimental data that the transport mechanism in the PTCDA thin film is dominated by the Poole–Frenkel model of thermionic emission, which may be associated with high density of structural defects or traps present in the film.

  7. Thin Film Silicon Nanowire/PEDOT:PSS Hybrid Solar Cells with Surface Treatment

    Science.gov (United States)

    Wang, Hao; Wang, Jianxiong; Hong, Lei; Tan, Yew Heng; Tan, Chuan Seng; Rusli

    2016-06-01

    SiNW/PEDOT:PSS hybrid solar cells are fabricated on 10.6-μm-thick crystalline Si thin films. Cells with Si nanowires (SiNWs) of different lengths fabricated using the metal-catalyzed electroless etching (MCEE) technique have been investigated. A surface treatment process using oxygen plasma has been applied to improve the surface quality of the SiNWs, and the optimized cell with 0.7-μm-long SiNWs achieved a power conversion efficiency (PCE) of 7.83 %. The surface treatment process is found to remove surface defects and passivate the SiNWs and substantially improve the average open circuit voltage from 0.461 to 0.562 V for the optimized cell. The light harvesting capability of the SiNWs has also been investigated theoretically using optical simulation. It is found that the inherent randomness of the MCEE SiNWs, in terms of their diameter and spacing, accounts for the excellent light harvesting capability. In comparison, periodic SiNWs of comparable dimensions have been shown to exhibit much poorer trapping and absorption of light.

  8. An automatic data acquisition system for optical characterization of PEDOT:PSS-based gas sensor

    Science.gov (United States)

    Junaidi, Aba, La; Triyana, Kuwat

    2015-04-01

    A measurement system that consists of a pair of laser diode and photodiode coupled with an automatic data acquisition system based on microcontroller of AVR ATMega16 (hereafter to be called DAQ MA-16) has been developed for measuring optical response of polymer-based gas sensor. In this case, the optical response was represented by the voltage output of the photodiode. The polymer-based gas sensor was a thin film of polymer of Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) or PEDOT:PSS deposited on a glass substrate. For measurement, the sensor was placed in the chamber, and then the gas ammonia with a fix flow rate was flowed into the chamber. The opposite part of the chamber was installed a pump to throw the gas. The National Instrument Data Acquisition (NI DAQ) BNC-2110 has been used to calibrate the DAQ MA-16 system. From the calibration, it can be estimated that the accuracy of DAQ MA-16 is about 99.4%.

  9. Capacitated vehicle routing problem for PSS uses based on ubiquitous computing: An emerging markets approach

    Directory of Open Access Journals (Sweden)

    Alberto Ochoa-Ortíz

    2015-01-01

    Full Text Available El problema de ruteo de vehículos bajo las limitaciones de capacidad y basado en computación ubicua desde una perspectiva relacionada con PSS (Producto-Servicio de Sistemas para desarrollar configuraciones para el transporte urbano de mercancías es abordado. Éste trabajo considera las especificidades de la logística urbana bajo un contexto de mercados emergentes. En este caso, involucra: i bajas competencias logísticas de los tomadores de decisiones; ii la limitada disponibilidad de datos; y iii restringido acceso a tecnología de alto desempeño para calcular rutas de transporte óptimas. Por lo tanto, se propone el uso de un software libre que proporciona soluciones de bajo costo (en tiempo y recursos. El artículo muestra la aplicación de los resultados de una herramienta de software basado en la Teoría de Grafos utilizado para analizar y resolver un CVRP (Capacitated Vehicle Routing Problem. Se utilizó el caso de una empresa local de distribución de alimentos situada en una gran ciudad de México. Sobre la base de una flora de vehículos pequeños, todos con las mismas especificaciones técnicas y una capacidad de carga comparable.

  10. A new LPV modeling approach using PCA-based parameter set mapping to design a PSS

    Directory of Open Access Journals (Sweden)

    Mohammad B. Abolhasani Jabali

    2017-01-01

    Full Text Available This paper presents a new methodology for the modeling and control of power systems based on an uncertain polytopic linear parameter-varying (LPV approach using parameter set mapping with principle component analysis (PCA. An LPV representation of the power system dynamics is generated by linearization of its differential-algebraic equations about the transient operating points for some given specific faults containing the system nonlinear properties. The time response of the output signal in the transient state plays the role of the scheduling signal that is used to construct the LPV model. A set of sample points of the dynamic response is formed to generate an initial LPV model. PCA-based parameter set mapping is used to reduce the number of models and generate a reduced LPV model. This model is used to design a robust pole placement controller to assign the poles of the power system in a linear matrix inequality (LMI region, such that the response of the power system has a proper damping ratio for all of the different oscillation modes. The proposed scheme is applied to controller synthesis of a power system stabilizer, and its performance is compared with a tuned standard conventional PSS using nonlinear simulation of a multi-machine power network. The results under various conditions show the robust performance of the proposed controller.

  11. Understanding the factors that influence high science achievers' academic choices and intent to pursue or opt out of the hard sciences

    Science.gov (United States)

    Quihuis, Gisell

    Drawing on Eccles and her colleagues' Expectancy-Value model of academic behavior and choice, this dissertation study set out to serve three purposes: (1) to understand how high achieving high school students who aspire to science college degrees compare, in terms of motivational beliefs and social experiences, with other high achievers who do not aspire to science college degrees; (2) to understand why some high school students who excel in the hard sciences are unsure about pursuing a science degree in college; and (3) to examine whether gender differences in motivational beliefs and social experiences found in previous research on math (see Eccles 1984) exist for science among high achieving high school students. Survey and interview data showed that gender differences previously found in Eccles' research on math exist for science among a select group of high achieving high school students. Yet, these gender differences did not explain students' aspirations for science. Motivation, classroom perceptions, science engagement, as well as other science-related experiences at home and school, including parent and teacher influences, were also important factors associated with students' aspirations for science. Results and implications for this study are encouraging because they suggest that both parents and educators can help more high achievers become interested in science. Parents can expose their children, male and female alike, to science at home early on in their childhood and teachers can help students sustain and further develop an interest in science at school. In this manner, both parents and teachers can work together as a team to encourage more high achievers to aspire to science degrees in their future. Lastly, it is important to note that this study found Eccles' model of motivation and choice helpful in understanding not only gender differences in math and the hard sciences, but also aspiration differences that cut across gender among students

  12. Does Birth Order and Academic Proficiency Influence Perfectionistic Self-presentation Among Undergraduate Engineering Students? A Descriptive Analysis.

    Science.gov (United States)

    Louis, Preeti Tabitha; Kumar, Navin

    2016-01-01

    Perfectionism is a multifaceted concept. It had both advantages and disadvantages. Perfectionistic traits have been associated with leadership and very intellectual people. The present study is an attempt to understand if engineering students possess perfectionistic orientation and whether it influences self-efficacy, social connectedness, and achievement motivation. The present study adopts a random sampling design to evaluate the presence of perfectionism as a personality trait among undergraduate engineering students (N = 320). Standardized inventories such as Almost Perfect Scale-Revised were administered first to identify perfectionists and second to differentiate the adaptive from the maladaptive perfectionists. Scheduled interviews were conducted with students to obtain information regarding birth order and family functioning. Findings from the study reveal that there were a significant number of maladaptive perfectionists and that they experienced higher levels of personal and societal demands leading to a negative emotional well-being in comparison to the adaptive perfectionists. We also observed that first-born children were more likely to display a perfectionistic self-presentation and from scheduled interviews, we understood that paternal influences were stronger when it came to decision-making and display of conscientiousness. The study draws on important implications for helping students to understand perfectionism and to respond to demands of the family and societal subsystems in a positive and an adaptive manner.

  13. Modification of electrical properties of PEDOT:PSS/p-Si heterojunction diodes by doping with dimethyl sulfoxide

    Science.gov (United States)

    Pathak, C. S.; Singh, J. P.; Singh, R.

    2016-05-01

    We report about the fabrication and electrical characterization of heterojunction diodes between poly (3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) doped with dimethyl sulfoxide (DMSO) and p-Si. Electrical characterization of the heterojunction diodes was performed using current-voltage (I-V) measurements. The heterojunction diodes showed good rectifying behavior. Interestingly, for 5 vol.% doping concentration of DMSO, the heterojunction diode showed the best diode characteristics with an ideality factor of 1.9. The doping of DMSO into PEDOT:PSS solution resulted in an increase in the conductivity of films by two orders of magnitude and the films showed high optical transmission (>85%) in the visible region.

  14. The temperature-dependent microstructure of PEDOT/PSS films: insights from morphological, mechanical and electrical analyses

    KAUST Repository

    Zhou, Jian

    2014-09-24

    Poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) is a widely used conductive polymer in the field of flexible electronics. The ways its microstructure changes over a broad range of temperatures remain unclear. This paper describes microstructure changes at different temperatures and correlates the microstructure with its physical properties (mechanical and electrical). We used High-Angle Annular Dark-Field Scanning Electron Microscopy (HAADF-STEM) combined with electron energy loss spectroscopy (EELS) to determine the morphology and elemental atomic ratio of the film at different temperatures. These results together with the Atomic Force Microscopy (AFM) analysis provide the foundation for a model of how the temperature affects the microstructure of PEDOT/PSS. Moreover, dynamic mechanical analysis (DMA) and electrical characterization were performed to analyze the microstructure and physical property correlations.

  15. Highly efficient color-stable deep-blue multilayer PLEDs: preventing PEDOT:PSS-induced interface degradation.

    Science.gov (United States)

    Nau, Sebastian; Schulte, Niels; Winkler, Stefanie; Frisch, Johannes; Vollmer, Antje; Koch, Norbert; Sax, Stefan; List, Emil J W

    2013-08-27

    Highly efficient and stable blue light emission is observed in novel copolymers that are produced from specially designed building blocks. A PEDOT:PSS-induced chemical degradation of the polymer light-emitting diodes (PLEDs) is identified at the interface, and it is found to be accompanied by a shift in the emission color. A method to prevent this highly undesirable interaction is presented. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  16. Flexible white phosphorescent organic light emitting diodes based on multilayered graphene/PEDOT:PSS transparent conducting film

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Xiaoxiao; Li, Fushan, E-mail: fushanli@hotmail.com; Wu, Wei; Guo, Tailiang, E-mail: gtl_fzu@hotmail.com

    2014-03-01

    Highlights: • A double-layered graphene/PEDOT:PSS film was fabricated by spray-coating. • A white flexible phosphorescent OLED was fabricated based on this film. • The white flexible OLED presented pure white light emission. • The flexible OLEDs showed a stable white emission during bending test. - Abstract: A double-layered graphene/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) conductive film was prepared, in which the PEDOT:PSS layer was obtained by using spray-coating technique. A flexible white phosphorescent organic light-emitting devices based on the graphene/PEDOT:PSS conductive film was fabricated. Phosphorescent material tris(2-phenylpyridine) iridium (Ir(ppy){sub 3}) and the fluorescent dye 5,6,11,12-tetraphenylnapthacene (Rubrene) were co-doped into 4,4′-N,N′-dicarbazole-biphenyl (CBP) host. N,N′-diphenyl-N,N′-bis(1-naphthyl)-(1,1′-biphenyl)-4,4′-diamine (NPB) and 4,7-diphenyl-1,10-phenanthroline (Bphen) were used as hole-transporting and electron-transporting layer, respectively, and 4,4′-bis(2,2′-diphenylvinyl)-1,1′-biphenyl (DPVBi) was used as blue light-emitting layer. The device presented pure white light emission with a Commission Internationale De I’Eclairage coordinates of (0.31, 0.33) and exhibited an excellent light-emitting stability during the bending cycle test with a radius of curvature of 10 mm.

  17. Liquid crystalline graphene oxide/PEDOT:PSS self-assembled 3D architecture for binder-free supercapacitor electrodes

    Directory of Open Access Journals (Sweden)

    Monirul eIslam

    2014-08-01

    Full Text Available Binder-free self-assembled 3D architecture electrodes have been fabricated by a novel convienient method. Liquid crystalline graphene oxide (LC GO was used as precursor to interact with poly(3,4-ethylene-dioxythiophene:poly(styrenesulfonate (PEDOT:PSS in dispersion in order to form a conductive polymer entrapped, self-assembled layer-by-layer structure. This advanced network containing PEDOT:PSS enabled us to ascribe the superior electrochemical properties of particular graphene sheets. This layer-by-layer self-assembled 3D architecture of best performing composite (rGO-PEDOT:PSS 25 showed excellent electrochemical performance of 434 F g-1 through chemical treatment. To highlight these advances, we further explored the practicality of the as-prepared electrode by varying the composite material content. An asymmetric supercapacitor device using aqueous electrolyte was also studied of this same composite. The resulting performance from this set up included a specific capacitance of 132 F g-1. Above all, we observed an increase in specific capacitance (19% with increase in cycle life emphasizing the excellent stability of this device.

  18. Characterization of Piezoresistive PEDOT:PSS Pressure Sensors with Inter-Digitated and Cross-Point Electrode Structures

    Directory of Open Access Journals (Sweden)

    Jer-Chyi Wang

    2015-01-01

    Full Text Available The piezoresistive characteristics of poly(3,4-ethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS pressure sensors with inter-digitated (IDE and cross-point electrode (CPE structures have been investigated. A small variation of the resistance of the pressure sensors with IDE without bottom indium-tin-oxide (b-ITO film and with CPE structures was observed owing to the single carrier-conducting pathway. For the IDE pressure sensors with b-ITO, the piezoresistive characteristics at low and high pressure were similar to those of the pressure sensors with IDE without b-ITO and with CPE structures, respectively, leading to increased piezoresistive pressure sensitivity as the PEDOT:PSS film thickness decreased. A maximum sensitivity of more than 42 kΩ/Pa was achieved. When the normal pressure was applied, the increased number of conducting points or the reduced distance between the PEDOT oligomers within the PEDOT:PSS film resulted in a decrease of the resistance. The piezoresistive pressure sensors with a single carrier-conducting pathway, i.e., IDE without b-ITO and CPE structures, exhibited a small relaxation time and a superior reversible operation, which can be advantageous for fast piezoresistive response applications.

  19. PEDOT:PSS interfaces support the development of neuronal synaptic networks with reduced neuroglia response in vitro

    Directory of Open Access Journals (Sweden)

    Giada eCellot

    2016-01-01

    Full Text Available The design of electrodes based on conductive polymers in brain-machine interface technology offers the opportunity to exploit variably manufactured materials to reduce gliosis, indeed the most common brain response to chronically implanted neural electrodes. In fact, the use of conductive polymers, finely tailored in their physical-chemical properties, might result in electrodes with improved adaptability to the brain tissue and increased charge-transfer efficiency. Here we interfaced poly(3,4-ethylenedioxythiophene:poly(styrene sulfonate (PEDOT:PSS doped with different amounts of ethylene glycol (EG with rat hippocampal primary cultures grown for 3 weeks on these synthetic substrates. We used immunofluorescence and scanning electron microscopy combined to single cell electrophysiology to assess the biocompatibility of PEDOT:PSS in terms of neuronal growth and synapse formation. We investigated neuronal morphology, density and electrical activity. We reported the novel observation that opposite to neurons, glial cell density was progressively reduced, hinting at the ability of this material to down regulate glial reaction. Thus PEDOT:PSS is an attractive candidate for the design of new implantable electrodes, controlling the extent of glial reactivity without affecting neuronal viability and function.

  20. pHEMA encapsulated PEDOT-PSS-CNT microsphere microelectrodes for recording single unit activity in the brain

    Directory of Open Access Journals (Sweden)

    Elisa eCastagnola

    2016-04-01

    Full Text Available The long-term reliability of neural interfaces and stability of high-quality recordings are still unsolved issues in neuroscience research. High surface area PEDOT-PSS-CNT composites are able to greatly improve the performance of recording and stimulation for traditional intracortical metal microelectrodes by decreasing their impedance and increasing their charge transfer capability. This enhancement significantly reduces the size of the implantable device though preserving excellent electrical performances. On the other hand, the presence of nanomaterials often rises concerns regarding possible health hazards, especially when considering a clinical application of the devices. For this reason, we decided to explore the problem from a new perspective by designing and testing an innovative device based on nanostructured microspheres grown on a thin tether, integrating PEDOT-PSS-CNT nanocomposites with a soft synthetic permanent biocompatible hydrogel. The pHEMA hydrogel preserves the electrochemical performance and high quality recording ability of PEDOT-PSS-CNT coated devices, reduces the mechanical mismatch between soft brain tissue and stiff devices and also avoids direct contact between the neural tissue and the nanocomposite, by acting as a biocompatible protective barrier against potential nanomaterial detachment. Moreover, the spherical shape of the electrode together with the surface area increase provided by the nanocomposite deposited on it, maximize the electrical contact and may improve recording stability over time. These results have a good potential to contribute to fulfill the grand challenge of obtaining stable neural interfaces for long-term applications.