Tablet Technology in Teacher Preparation: A Case Study--The Nook Initiative

Science.gov (United States)

Jordan, Hope; Hunter, Elizabeth; Douglas, Maegan; Wighting, Mervyn

2015-01-01

Regent University's Special Education and Reading Specialist Programs introduced the Nook Initiative fall 2013. This paper discusses the implementation, the need for integrated tablet technology in teacher preparation, initial outcomes of the study, and offers suggestions for practice. A second tablet pilot program introducing the iPad mini in the…

A Comparative Case Study of Student Preparation for Postsecondary Education: How GEAR UP, Socioeconomic Status, and Race Influence Academic and Non-Academic Factors

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Lunceford, Christina J.; Sondergeld, Toni A.; Stretavski, Elizabeth L.

2017-01-01

The purpose of this study was to gain a better understanding of early preparation for postsecondary education and explore the effectiveness of Gaining Early Awareness and Readiness for Undergraduate Programs (GEAR UP). This comparative case study included 836 students from two cohorts (GEAR UP and Non GEAR UP). We compared high school attendance,…

The Preparation of Teacher Candidates for K-12 Online Learning Environments: A Case Study

Science.gov (United States)

Williams, Nicole V.

2015-01-01

The purpose of this study was to determine how teacher education programs may better prepare teacher candidates to teach in K-12 online learning environments. The primary research question addressed was: What specific knowledge, skills, and dispositions should teacher education programs include in their curriculum to better prepare teacher…

Case Study: Unfavorable But Transient Physiological Changes During Contest Preparation in a Drug-Free Male Bodybuilder.

Science.gov (United States)

Pardue, Andrew; Trexler, Eric T; Sprod, Lisa K

2017-12-01

Extreme body composition demands of competitive bodybuilding have been associated with unfavorable physiological changes, including alterations in metabolic rate and endocrine profile. The current case study evaluated the effects of contest preparation (8 months), followed by recovery (5 months), on a competitive drug-free male bodybuilder over 13 months (M1-M13). Serum testosterone, triiodothyronine (T 3 ), thyroxine (T 4 ), cortisol, leptin, and ghrelin were measured throughout the study. Body composition (BodPod, dualenergy x-ray absorptiometry [DXA]), anaerobic power (Wingate test), and resting metabolic rate (RMR) were assessed monthly. Sleep was assessed monthly via the Pittsburgh Sleep Quality Index (PSQI) and actigraphy. From M1 to M8, testosterone (623-173 ng∙dL -1 ), T 3 (123-40 ng∙dL -1 ), and T 4 (5.8-4.1 mg∙dL -1 ) decreased, while cortisol (25.2-26.5 mg∙dL -1 ) and ghrelin (383-822 pg∙mL -1 ) increased. The participant lost 9.1 kg before competition as typical energy intake dropped from 3,860 to 1,724 kcal∙day -1 ; BodPod estimates of body fat percentage were 13.4% at M1, 9.6% at M8, and 14.9% at M13; DXA estimates were 13.8%, 5.1%, and 13.8%, respectively. Peak anaerobic power (753.0 to 536.5 Watts) and RMR (107.2% of predicted to 81.2% of predicted) also decreased throughout preparation. Subjective sleep quality decreased from M1 to M8, but objective measures indicated minimal change. By M13, physiological changes were largely, but not entirely, reversed. Contest preparation may yield transient, unfavorable changes in endocrine profile, power output, RMR, and subjective sleep outcomes. Research with larger samples must identify strategies that minimize unfavorable adaptations and facilitate recovery following competition.

A Case Study of "Empathetic Teaching Artistry"

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Risner, Doug

2014-01-01

This case study is one of twenty cases derived from Anderson and Risner's international study of teaching artists in dance, and theatre, which investigated participants' (n=172) artistic and academic preparation in dance, and theatre, initial entry into the teaching artist field, rewards, challenges, and obstacles in participants' work, artists'…

Are graduated intensivists prepared for practice? : A case study from The Netherlands

NARCIS (Netherlands)

Dijkstra, Ids S.; Brand, Paul L. P.; Pols, Jan; Delwig, Hans; Jaarsma, Debbie A. D. C.; Tulleken, Jaap E.

2017-01-01

Purpose: An evaluation of the alignment between intensive care medicine (ICM) training and practice provides valuable information for the development of ICM training. Therefore this study examines how well recently licensed intensivists feel prepared for practice and whether intensivists from

A case study exploring the current issues faced by diploma-prepared nurses.

Science.gov (United States)

Droskinis, Amy

2013-01-01

Nursing is a dynamic and rapidly progressing field. As the profession changes over time, it is vital to study how these transformations influence the workforce. In this study, the aim was to explore how diploma-prepared nurses are functioning in the acute care setting and how modifications in educational requirements and technological advancement have affected their nursing practice.

Negative pressure therapy (vacuum for wound bed preparation among diabetic patients: case series

Directory of Open Access Journals (Sweden)

Marcus Castro Ferreira

Full Text Available CONTEXT: Complications from diabetes mellitus affecting the lower limbs occur in 40 to 70% of such patients. Neuropathy is the main cause of ulceration and may be associated with vascular impairment. The wound evolves with necrosis and infection, and if not properly treated, amputation may be the end result. Surgical treatment is preferred in complex wounds without spontaneous healing. After debridement of the necrotic tissue, the wound bed needs to be prepared to receive a transplant of either a graft or a flap. Dressings can be used to prepare the wound bed, but this usually leads to longer duration of hospitalization. Negative pressure using a vacuum system has been proposed for speeding up the treatment. This paper had the objective of analyzing the effects of this therapy on wound bed preparation among diabetic patients. CASE SERIES: Eighty-four diabetic patients with wounds in their lower limbs were studied. A commercially available vacuum system was used for all patients after adequate debridement of necrotic tissues. For 65 patients, skin grafts completed the treatment and for the other 19, skin flaps were used. Wound bed preparation was achieved over an average time of 7.51 days for 65 patients and 10 days for 12 patients, and in only one case was not achieved. CONCLUSIONS: This experience suggests that negative pressure therapy may have an important role in wound bed preparation and as part of the treatment for wounds in the lower limbs of diabetic patients.

A nutrition and conditioning intervention for natural bodybuilding contest preparation: case study.

Science.gov (United States)

Robinson, Scott Lloyd; Lambeth-Mansell, Anneliese; Gillibrand, Gavin; Smith-Ryan, Abbie; Bannock, Laurent

2015-01-01

Bodybuilding competitions are becoming increasingly popular. Competitors are judged on their aesthetic appearance and usually exhibit a high level of muscularity and symmetry and low levels of body fat. Commonly used techniques to improve physique during the preparation phase before competitions include dehydration, periods of prolonged fasting, severe caloric restriction, excessive cardiovascular exercise and inappropriate use of diuretics and anabolic steroids. In contrast, this case study documents a structured nutrition and conditioning intervention followed by a 21 year-old amateur bodybuilding competitor to improve body composition, resting and exercise fat oxidation, and muscular strength that does not involve use of any of the above mentioned methods. Over a 14-week period, the Athlete was provided with a scientifically designed nutrition and conditioning plan that encouraged him to (i) consume a variety of foods; (ii) not neglect any macronutrient groups; (iii) exercise regularly but not excessively and; (iv) incorporate rest days into his conditioning regime. This strategy resulted in a body mass loss of 11.7 kg's, corresponding to a 6.7 kg reduction in fat mass and a 5.0 kg reduction in fat-free mass. Resting metabolic rate decreased from 1993 kcal/d to 1814 kcal/d, whereas resting fat oxidation increased from 0.04 g/min to 0.06 g/min. His capacity to oxidize fat during exercise increased more than two-fold from 0.24 g/min to 0.59 g/min, while there was a near 3-fold increase in the corresponding exercise intensity that elicited the maximal rate of fat oxidation; 21% V̇O2max to 60% V̇O2max. Hamstring concentric peak torque decreased (1.7 to 1.5 Nm/kg), whereas hamstring eccentric (2.0 Nm/kg to 2.9 Nm/kg), quadriceps concentric (3.4 Nm/kg to 3.7 Nm/kg) and quadriceps eccentric (4.9 Nm/kg to 5.7 Nm/kg) peak torque all increased. Psychological mood-state (BRUMS scale) was not negatively influenced by the intervention and all values relating to the Athlete

Bioremediation case studies: Abstracts. Final report

International Nuclear Information System (INIS)

Devine, K.

1992-03-01

The report contains abstracts of 132 case studies of bioremediation technology applied to hazardous waste clean-up. It was prepared to compile bioremediation studies in a variety of locations and treating diverse contaminants, most of which were previously undocumented. All data are based on vendor-supplied information and there was no opportunity to independently confirm its accuracy. These 132 case studies, from 10 different biotechnology companies, provide users with reference information about on-going and/or completed field applications and studies. About two-thirds of the cases were at full-scale clean-up level with the remainder at pilot or laboratory scale. In 74 percent of the cases, soil was at least one of the media treated. Soil alone accounts for 46 percent of the cases. Petroleum-related wastes account for the largest contaminant with 82 cases. Thirty-one states are represented in the case studies

Case Study Research in Software Engineering Guidelines and Examples

CERN Document Server

Runeson, Per; Rainer, Austen; Regnell, Bjorn

2012-01-01

Based on their own experiences of in-depth case studies of software projects in international corporations, in this book the authors present detailed practical guidelines on the preparation, conduct, design and reporting of case studies of software engineering.  This is the first software engineering specific book on the case study research method.

Preparing Teachers for Diversity: The Role of Initial Teacher Education. Annex 2 To the Final Report to DG Education, Youth, Sport and Culture of the European Commission. Case Study Summaries

Science.gov (United States)

European Commission, 2017

2017-01-01

"Preparing Teachers for Diversity: The Role of Initial Teacher Education. Annex 2 To the Final Report to DG Education, Youth, Sport and Culture of the European Commission. Case Study Summaries" is designed as a companion document to the final report "Preparing Teachers for Diversity: The Role of Initial Teacher Education. Final…

EnCE EnCase computer forensics : the official EnCase certified examiner : study guide

CERN Document Server

Bunting, Steve

2012-01-01

The official, Guidance Software-approved book on the newest EnCE exam! The EnCE exam tests that computer forensic analysts and examiners have thoroughly mastered computer investigation methodologies, as well as the use of Guidance Software's EnCase Forensic 7. The only official Guidance-endorsed study guide on the topic, this book prepares you for the exam with extensive coverage of all exam topics, real-world scenarios, hands-on exercises, up-to-date legal information, and sample evidence files, flashcards, and more. Guides readers through preparation for the newest EnCase Certified Examiner

Impact of preparing for OSHA local emphasis program inspections of New York dairy farms: Case studies and financial cost analysis.

Science.gov (United States)

Gadomski, Anne M; Vargha, Marybeth; Tallman, Nancy; Scribani, Melissa B; Kelsey, Timothy W

2016-03-01

OSHA inspection of dairy farms began in July 1, 2014 in New York State. As of September 2014, a total of eight farms were randomly selected for inspection. This case study addresses how dairy farm managers prepared for these inspections, and identifies farm level costs preparing for inspection and/or being inspected. Four farms that were OSHA inspected and 12 farms that were not inspected were included in this mixed method evaluation using a multimodal (telephone, email, or mail) survey. Descriptive analysis was carried out using frequencies, proportions, means, and medians. Overall, the impact of OSHA inspections was positive, leading to improved safety management and physical changes on the farm and worker trainings, although the farmers' perspectives about OSHA inspection were mixed. The cost of compliance was low relative to estimated overall production costs. Clarifications and engineering solutions for specific dairy farm hazard exposures are needed to facilitate compliance with OSHA regulations. © 2015 Wiley Periodicals, Inc.

Managing Expectations: Results from Case Studies of US Water Utilities on Preparing for, Coping with, and Adapting to Extreme Events

Science.gov (United States)

Beller-Simms, N.; Metchis, K.

2014-12-01

Water utilities, reeling from increased impacts of successive extreme events such as floods, droughts, and derechos, are taking a more proactive role in preparing for future incursions. A recent study by Federal and water foundation investigators, reveals how six US water utilities and their regions prepared for, responded to, and coped with recent extreme weather and climate events and the lessons they are using to plan future adaptation and resilience activities. Two case studies will be highlighted. (1) Sonoma County, CA, has had alternating floods and severe droughts. In 2009, this area, home to competing water users, namely, agricultural crops, wineries, tourism, and fisheries faced a three-year drought, accompanied at the end by intense frosts. Competing uses of water threatened the grape harvest, endangered the fish industry and resulted in a series of regulations, and court cases. Five years later, new efforts by partners in the entire watershed have identified mutual opportunities for increased basin sustainability in the face of a changing climate. (2) Washington DC had a derecho in late June 2012, which curtailed water, communications, and power delivery during a record heat spell that impacted hundreds of thousands of residents and lasted over the height of the tourist-intensive July 4th holiday. Lessons from this event were applied three months later in anticipation of an approaching Superstorm Sandy. This study will help other communities in improving their resiliency in the face of future climate extremes. For example, this study revealed that (1) communities are planning with multiple types and occurrences of extreme events which are becoming more severe and frequent and are impacting communities that are expanding into more vulnerable areas and (2) decisions by one sector can not be made in a vacuum and require the scientific, sectoral and citizen communities to work towards sustainable solutions.

Nevoid melanoma of the vagina: report of one case diagnosed on thin layer cytological preparations

Directory of Open Access Journals (Sweden)

Ascierto Paolo

2007-01-01

Full Text Available Abstract Background Primary melanoma of the vagina is an extremely rare neoplasm with approximately 250 reported cases in the world literature 1234. In its amelanotic variant this lesion may raise several differential diagnostic problems in cytological specimens 5. In this setting, the usage of thin layer cytopathological techniques (Liquid Based Preparations = LBP may enhance the diagnostic sensitivity by permitting immunocytochemical study without having to repeat the sampling procedure. The aim of this paper is to describe the cytomorphological presentation of primary vaginal melanoma on LBP since it has not previously been reported up to now, to our knowledge. Case presentation a 79-y-o female complaining of vulvar itching and yellowish vaginal discharge underwent a complete gynaecological evaluation during which a LBP cytological sample was taken from a suspicious whitish mass protruding into the vaginal lumen. A cytopathological diagnosis of amelanotic melanoma was rendered. The mass was radically excised and the patient was treated with α-Interferon. Conclusion amelanotic melanoma may be successfully diagnosed on LBP cytological preparations. Thin layer preparations may enhance the diagnostic cytomorphological clues to its diagnosis and may permit an adequate immunocytochemical characterization of the neoplasm.

Preparing Business Students for the Challenge Ahead: A Case Study

Science.gov (United States)

Pang, Mary; Ho, To Ming

2005-01-01

In a rapidly changing society, business education needs to likewise change and evolve to remain relevant and useful. This paper looks at the graduates of one university in Hong Kong and examines how well they feel they are prepared for the world of work. Through the analysis of secondary data, an assessment was made of the success or otherwise of…

Case Report Writing in a Doctor of Physical Therapy Education Program: A Case Study

Science.gov (United States)

Fillyaw, Michael J.

2011-01-01

Case reports are an established form of scholarship used for teaching and learning in medicine and health care, but there are few examples of the teaching and learning activities used to prepare students to write a case report. This report describes the implementation of two courses that prepare physical therapy students to write and disseminate a…

A Case-Study Assignment to Teach Theoretical Perspectives in Abnormal Psychology.

Science.gov (United States)

Perkins, David V.

1991-01-01

Describes an assignment that requires students to organize, prepare, and revise a case study in abnormal behavior. Explains that students employ a single theoretical perspective in preparing a report on a figure from history, literature, the arts, or current events. Discusses the value of the assignment for students. (SG)

The preparation of native livers for morphological studies.

Science.gov (United States)

Ludwig, J; Ottman, D M; Eichmann, T J

1994-09-01

We describe experiences with a perfusion fixation apparatus that was used for studies on approximately 500 native livers. Immediately after excision of the specimen, small samples from needle biopsy specimens are obtained for snap-freezing and the remaining portions of the specimens are fixed and embedded in paraffin. In the laboratory, the portal vein and, if possible, the hepatic artery or common hepatic duct are then cannulated and the livers are perfused for 3 days with Kaiserling's solution. An electric pump drives the perfusion apparatus and allows the formalin to cascade through stacked plastic containers, with the specimens attached to the inflow nozzles for the fixative. Eight or more livers (or other organs and specimens) can be accommodated simultaneously. Angiograms or cholangiograms can be prepared before or after fixation; we prefer the latter. The livers are then sliced with an extra-long knife, which minimizes cutting marks. Most preparations are thoroughly fixed and yield excellent specimens, not only for routine microscopic study but also for special methods such as scanning electron microscopy and trace metal analysis. The liver slices can be stored indefinitely, which allows long-range collection for routine review or research purposes. In approximately 5% of the cases, specimens cannot be perfused properly and thus are unsuitable for this type of preparation. With autopsy specimens this percentage is higher, probably because of postmortem clotting. Gravity perfusion of the livers before placement into the apparatus generally enables identification of specimens with incomplete filling of the vasculature.

Successful implementation of the National Environmental Policy Act (NEPA) at a US Department of Energy (DOE) site: Environmental assessment preparation - a case study

International Nuclear Information System (INIS)

Haagenstad, T.; Ladino, A.

1997-01-01

The U.S. Department of Energy (DOE) at Los Alamos National Laboratory (LANL) implements the requirements of the National Environmental Policy Act (NEPA) using a NEPA Compliance Team. The NEPA Compliance Team (Team) is composed of DOE Los Alamos Area Office (LAAO) and LANL employees that combine to create quality improvements in the DOE NEPA compliance process at both LAAO and LANL. A major focus of quality improvement has been in the area of Environmental Assessment (EA) documentation preparation. The NEPA Team within LANL's Ecology Group (ESH-20) is the organization responsible for preparing the EA documentation on behalf of DOE. DOE and LANL team in an interdisciplinary process to prepare review, and complete EAs using the technical expertise of individuals throughout the DOE and LANL. This approach has demonstrated significant time and cost savings as well as EA document quality improvements. The process used to prepare an EA for the Low Energy Demonstration Accelerator (LEDA) is presented as an example of a successful approach to implementing NEPA. The LEDA EA is used as a case study example to demonstrate how an integrated and interdisciplinary approach to conducting a NEPA analysis yields extremely successful results. The LEDA EA was prepared on an extremely aggressive schedule with tight cost constraints. The ESH-20 NEPA Team was successful in providing a critical link between the DOE decision-makers and the LEDA project representatives within LANL. As the technical scope of the LEDA project changed during the preparation of the EA, by emphasizing an interdisciplinary approach, the Team was able to quickly assess the implications and potential impacts through open communications with the various subject matter experts while maintaining a pace consistent with the EA schedule demands

A case study of illicit preparation of antirheumatic analgesic with phenylbutazone as active ingredient.

Science.gov (United States)

Thuan, C E; Huat, L B

1989-06-01

The abuse of phenylbutazone among rheumatoid arthritis patients has recently become a subject of interest. Unscrupulous manufacturers take advantage of the miraculous analgesic property of phenylbutazone and deliberately add this toxic drug in their preparations without declaring its presence on the label. In a recent survey, many such illicit preparations were seized from Chinese medical halls in Johor and sent to the Department of Chemistry, Johor Bahru for analysis. Here a Gas Chromatograph Mass Selective Detector (GC-MSD) method was developed for the determination of phenylbutazone in illicit traditional preparations.

A Case Study of Learning, Motivation, and Performance Strategies for Teaching and Coaching CDE Teams

Science.gov (United States)

Ball, Anna; Bowling, Amanda; Bird, Will

2016-01-01

This intrinsic case study examined the case of students on CDE (Career Development Event) teams preparing for state competitive events and the teacher preparing them in a school with a previous exemplary track record of winning multiple state and national career development events. The students were interviewed multiple times during the 16-week…

Preparation for and physiological responses to competing in the Marathon des Sables: a case report.

Science.gov (United States)

Williams, N; Wickes, S J; Gilmour, K; Barker, N; Scott, J P R

2014-02-01

A case study into the preparation and physiological responses of competing in the Marathon des Sables (MDS) was conducted by preparing a male competitor for, and monitoring him during, his first attempt at the race. The aims of this case report were to (a) prepare and monitor an ex-Olympic, male rower (S1) during the 2010 race and; (b) compare his physiological responses and race performance to that of the current MDS record holder (S2). S1 (age 37 y; body mass 94.0 kg; height 1.92 m; VO(2peak) 66.0 ml·kg⁻¹·min⁻¹) and S2 (age 37 y; body mass 60.8 kg; height 1.68 m; VO(2peak) 65.9 ml·kg⁻¹·min⁻¹) completed a heat test and S1 subsequently underwent 7 d of heat acclimation prior to the MDS. Gastro-intestinal temperature (Tgi) and heart rate (HR) were measured for S1 during Stages 2, 4, and 5 of the MDS and pre- and post-stage body mass, and urine specific gravity were measured for all stages. Race time and average speeds were collected for S1 and S2. Total race times for S1 and S2 were 25:29:35 and 19:45:08 h:min:s. S1's mean (± 1 SD) percentage HR range (%HRR=[HR-HRmin]/[HRmax-HRmin]x100) was 66.1 ± 13.4% and Tgi ranged between 36.63-39.65°C. The results provide a case report on the physiological responses of a highly aerobically-trained, but novice ultra-endurance runner competing in the MDS, and allow for a comparison with an elite performer.

Rigour in qualitative case-study research.

Science.gov (United States)

Houghton, Catherine; Casey, Dympna; Shaw, David; Murphy, Kathy

2013-03-01

To provide examples of a qualitative multiple case study to illustrate the specific strategies that can be used to ensure the credibility, dependability, confirmability and transferability of a study. There is increasing recognition of the valuable contribution qualitative research can make to nursing knowledge. However, it is important that the research is conducted in a rigorous manner and that this is demonstrated in the final research report. A multiple case study that explored the role of the clinical skills laboratory in preparing students for the real world of practice. Multiple sources of evidence were collected: semi-structured interviews (n=58), non-participant observations at five sites and documentary sources. Strategies to ensure the rigour of this research were prolonged engagement and persistent observation, triangulation, peer debriefing, member checking, audit trail, reflexivity, and thick descriptions. Practical examples of how these strategies can be implemented are provided to guide researchers interested in conducting rigorous case study research. While the flexible nature of qualitative research should be embraced, strategies to ensure rigour must be in place.

Use of Powder PEG-3350 as a Sole Bowel Preparation: Clinical Case Series of 245 Patients.

Science.gov (United States)

Arora, Manish; Okolo, Patrick I

2008-07-01

To assess the efficacy of low-volume powder polyethylene glycol (PEG)-3350 as a sole bowel preparation for colonoscopy. This case series examined 245 consecutive patients (a mixture of inpatients and outpatients undergoing screening colonoscopy) at a hospital endoscopy center over a 2-year period. The patients received powder PEG-3350 in the amount of 204 g dissolved in 32 oz of water and taken in 3 divided doses 1 hour apart with 8 oz of water in between each dose. Colon preparation scores (CPS) were used to assess the quality of colon cleansing. The results obtained from the 245 patients were collated and compared to those of patients receiving sodium phosphate, the historical control. The mean CPS was calculated to be 3.43, with a standard deviation of 1.12. Of the 245 patients, 92 were scored with a grade of 4, and 5 patients had incomplete colonoscopies secondary to failure of bowel preparation (CPS=0). Among the remaining patients, 22 and 26 were graded as poor (CPS=1) or fair (CPS=2) bowel preparations, respectively. The low-volume powder PEG-3350 formula used in our case series showed effective colon cleansing and may be considered for use as a sole bowel preparation.

PREPARING SOCIAL WORKERS FOR ALTERNATIVE DISPUTE RESOLUTION IN CARE AND PROTECTION CASES

Directory of Open Access Journals (Sweden)

Matthias, Carmel

2014-11-01

Full Text Available The Children’s Act 38 of 2005 contains provisions enabling utilisation of alternative dispute resolution (ADR in cases involving children. This article focuses on the specialised training required to prepare social workers to be effective ADR practitioners. By drawing on comparative data, the article demonstrates that it is essential for social workers to receive such training in South Africa. The nature of the training that would be required to empower South African social workers to be effective ADR facilitators in care and protection cases is explored. Proposals for a South African training programme are put forward.

Optimal preparation-to-colonoscopy interval in split-dose PEG bowel preparation determines satisfactory bowel preparation quality: an observational prospective study.

Science.gov (United States)

Seo, Eun Hee; Kim, Tae Oh; Park, Min Jae; Joo, Hee Rin; Heo, Nae Yun; Park, Jongha; Park, Seung Ha; Yang, Sung Yeon; Moon, Young Soo

2012-03-01

Several factors influence bowel preparation quality. Recent studies have indicated that the time interval between bowel preparation and the start of colonoscopy is also important in determining bowel preparation quality. To evaluate the influence of the preparation-to-colonoscopy (PC) interval (the interval of time between the last polyethylene glycol dose ingestion and the start of the colonoscopy) on bowel preparation quality in the split-dose method for colonoscopy. Prospective observational study. University medical center. A total of 366 consecutive outpatients undergoing colonoscopy. Split-dose bowel preparation and colonoscopy. The quality of bowel preparation was assessed by using the Ottawa Bowel Preparation Scale according to the PC interval, and other factors that might influence bowel preparation quality were analyzed. Colonoscopies with a PC interval of 3 to 5 hours had the best bowel preparation quality score in the whole, right, mid, and rectosigmoid colon according to the Ottawa Bowel Preparation Scale. In multivariate analysis, the PC interval (odds ratio [OR] 1.85; 95% CI, 1.18-2.86), the amount of PEG ingested (OR 4.34; 95% CI, 1.08-16.66), and compliance with diet instructions (OR 2.22l 95% CI, 1.33-3.70) were significant contributors to satisfactory bowel preparation. Nonrandomized controlled, single-center trial. The optimal time interval between the last dose of the agent and the start of colonoscopy is one of the important factors to determine satisfactory bowel preparation quality in split-dose polyethylene glycol bowel preparation. Copyright © 2012 American Society for Gastrointestinal Endoscopy. Published by Mosby, Inc. All rights reserved.

Physics in Industry: A Case Study

Science.gov (United States)

Pratt-Ferguson, Ben

2007-10-01

Often ignored and sometimes even considered ``black sheep'' by the university & government-lab physicists, many industrial physicists continue making valuable scientific contributions in diverse areas, from computer science to aero and thermo-dynamics, communications, mathematics, engineering, and simulation, to name a few. This talk will focus on what industrial physicists do, what preparations are beneficial to obtaining a first industrial job, and what the business environment is like for physicists. The case study will be that of the author, starting with undergraduate and graduate studies and continuing on to jobs in industry.

Biofeedback Training for Peak Performance in Sport - Case Study

OpenAIRE

Pop-Jordanova, Nada; Demerdzieva, Aneta

2017-01-01

The use of peripheral biofeedback and neurofeedback is growing rapidly in sport psychology. The aim is to lower competition stress, anxiety, and muscle tension.We present a case report concerned to biofeedback training in an athlete in preparation to Olympic Game competition. It is the first case in our region to prepare athlete with biofeedback modalities. Obtained results are very encouraging.

Case Study: Testing with Case Studies

Science.gov (United States)

Herreid, Clyde Freeman

2015-01-01

This column provides original articles on innovations in case study teaching, assessment of the method, as well as case studies with teaching notes. This month's issue discusses using case studies to test for knowledge or lessons learned.

The "Highly Satisfied" Teaching Artist in Dance: A Case Study

Science.gov (United States)

Risner, Doug; Anderson, Mary Elizabeth

2012-01-01

This case study is drawn from the authors' ongoing international study of teaching artists in dance and theatre. The study takes an in-depth look at teaching artists' artistic and academic preparation in dance and theatre, entry into the teaching artist field, rewards, challenges, and assessment of their work, and their professional development,…

Preparation for the members of the public in case of a nuclear emergency in Argentina

International Nuclear Information System (INIS)

Jordan, Osvaldo; Telleria, Diego; Hernandez, Daniel; Kunst, Juan; Cateriano, Miguel; Rey, Hugo

2008-01-01

The Nuclear Law (Law Nr. 24804, year 1997) establishes that the Nuclear Regulatory Authority (ARN) has the duties of population's informing and preparation for the case of nuclear accidents. Knowing the foresee involvement of the public in a nuclear emergency, this preparation is carried out in the framework of contingency plans approved by the Nuclear Regulatory Authority. The population's preparation is a key task to arrive to the objective of minimizing the consequences of a nuclear incident. The ARN has defined the necessary countermeasures for the first hours and as the local population is involved, they must be trained in order to ensure the better level of efficacy. An important part in the preparation is the diffusion of information in the schools so the students know what they should do in case they receive an alert from the nuclear emergency command. The presentations at schools are divided by the differences in the levels of understanding, considering the ages of the students. These tasks are carried out once a year during the exercise preparation and it has a main objective: to diffuse the primordial protection actions. Similarly diffusion activities on protection actions were carried out with other sectors of the general public, with talk shows, discussions and explanation of doubts generated during the open meetings invited by the local civil defense, the nuclear power plant and the ARN. This work presents the details of tasks carried out with the educational community, the civil organizations the population and the conclusions obtained during these activities. (author)

Nevoid melanoma of the vagina: report of one case diagnosed on thin layer cytological preparations.

Science.gov (United States)

Fulciniti, Franco; Ascierto, Paolo Antonio; Simeone, Ester; Bove, Patrizia; Losito, Simona; Russo, Serena; Gallo, Maria Stella; Greggi, Stefano

2007-07-03

Primary melanoma of the vagina is an extremely rare neoplasm with approximately 250 reported cases in the world literature 1234. In its amelanotic variant this lesion may raise several differential diagnostic problems in cytological specimens 5. In this setting, the usage of thin layer cytopathological techniques (Liquid Based Preparations = LBP) may enhance the diagnostic sensitivity by permitting immunocytochemical study without having to repeat the sampling procedure. The aim of this paper is to describe the cytomorphological presentation of primary vaginal melanoma on LBP since it has not previously been reported up to now, to our knowledge. a 79-y-o female complaining of vulvar itching and yellowish vaginal discharge underwent a complete gynaecological evaluation during which a LBP cytological sample was taken from a suspicious whitish mass protruding into the vaginal lumen. A cytopathological diagnosis of amelanotic melanoma was rendered. The mass was radically excised and the patient was treated with alpha-Interferon. amelanotic melanoma may be successfully diagnosed on LBP cytological preparations. Thin layer preparations may enhance the diagnostic cytomorphological clues to its diagnosis and may permit an adequate immunocytochemical characterization of the neoplasm.

Hydrocarbon storage caverns overhaul: A case study

Energy Technology Data Exchange (ETDEWEB)

McDougall, N. [Bayer Inc., Sarnia, ON (Canada)

1998-09-01

Case studies of four hydrocarbon storage cavern overhauls by Bayer Inc., of Sarnia during the period 1993 to 1997 were reviewed and the lessons learned were discussed. Discussions included inspection requirements for each of the caverns, the logistics and planning plant production around the cavern outages, site and cavern preparation, including removal of the casing slips from the well heads. It was emphasized that cavern overhauls can be expensive operations, unless preceded by proper planning. The largest variable cost is likely to be rig time at about $ 2,000 per day. Planning for the unexpected with thoughtful contingencies can reduce costs and avoid expensive delays.

A feasibility study on laxative-free bowel preparation for virtual colonoscopy

Science.gov (United States)

Liang, Zhengrong; Chen, Dongqing; Wax, Mark; Lakare, Sarang; Li, Lihong; Anderson, Joseph; Kaufman, Arie; Harrington, Donald

2005-04-01

Objective: To investigate the feasibility of laxative-free bowel preparation to relieve the patient stress in colon cleansing for virtual colonoscopy. Materials and Methods: Three different bowel-preparation protocols were investigated by 60 study cases from 35 healthy male volunteers. All the protocols utilize low-residue diet for two days and differ in diet for the third day - the day just prior to image acquisition in the fourth day morning. Protocol Diet-1 utilizes fluid or liquid diet in the third day, Diet-2 utilizes a food kit, and Diet-3 remains the low-residue diet. Oral contrast of barium sulfate (2.1%, 250 ml) was added respectively to the dinner in the second day and the three meals in the third day. Two doses of MD-Gastroview (60 ml) were ingested each in the evening of the third day and in the morning before image acquisition. Images were acquired by a single-slice detector spiral CT (computed tomography) scanner with 5 mm collimation, 1 mm reconstruction, 1.5-2.0:1.0 pitch, 100-150 mA, and 120 kVp after the colons were inflated by CO2. The contrasted colonic residue materials were electronically removed from the CT images by specialized computer-segmentation algorithms. Results: By assumptions that the healthy young volunteers have no polyp and the image resolution is approximately 4 mm, a successful electronic cleansing is defined as "no more than five false positives and no removal of a colon fold part greater than 4 mm" for each study case. The successful rate is 100% for protocol Diet-1, 77% for Diet-2 and 57% for Diet-3. Conclusion: A laxative-free bowel preparation is feasible for virtual colonoscopy.

Case Studies, Ethics, Philosophy and Liberal Learning for the Management Profession

DEFF Research Database (Denmark)

Rendtorff, Jacob Dahl

2015-01-01

Case studies can be an important methodology for ethics and philosophy in humanistic management and liberal education as well as in the social sciences because they integrate a deeper, reflective, philosophical, and ethical understanding of the organization. A case study approach based...... on philosophy of management contributes to putting into practice the Carnegie Foundation report Rethinking Undergraduate Education: Liberal Learning for the Profession. This approach is both inductive and deductive and very different from a soft Socratic approach to case studies such as the one often used...... in business schools following the Harvard method, wherein students are supposed to get knowledge through the reading of a case prepared by the teacher or from a business textbook. The aim of the case study is to analyze a concrete case and get general knowledge through the integrated analysis of the different...

The Gerontologist as a case manager: simulation of experiences in distinct and specific studies

Directory of Open Access Journals (Sweden)

Marcelo Piovezan

2013-10-01

Full Text Available In Case Management are identified the characteristics that involve elderly and their families by providing adequate planning to meet their needs. Case studies of three subjects were prepared containing relevant information to the preparation of action plans that have been divided into categories. The actions aim to promote quality of life of the aged, as well as of their families and caregivers. The work highlighted the possibility and need of insertion of the method to the Gerontologist performance.

Ultrasonic implant site preparation using piezosurgery: a multicenter case series study analyzing 3,579 implants with a 1- to 3-year follow-up.

Science.gov (United States)

Vercellotti, Tomaso; Stacchi, Claudio; Russo, Crescenzo; Rebaudi, Alberto; Vincenzi, Giampaolo; Pratella, Umberto; Baldi, Domenico; Mozzati, Marco; Monagheddu, Chiara; Sentineri, Rosario; Cuneo, Tommaso; Di Alberti, Luca; Carossa, Stefano; Schierano, Gianmario

2014-01-01

This multicenter case series introduces an innovative ultrasonic implant site preparation (UISP) technique as an alternative to the use of traditional rotary instruments. A total of 3,579 implants were inserted in 1,885 subjects, and the sites were prepared using a specific ultrasonic device with a 1- to 3-year follow-up. No surgical complications related to the UISP protocol were reported for any of the implant sites. Seventy-eight implants (59 maxillary, 19 mandibular) failed within 5 months of insertion, for an overall osseointegration percentage of 97.82% (97.14% maxilla, 98.75% mandible). Three maxillary implants failed after 3 years of loading, with an overall implant survival rate of 97.74% (96.99% maxilla, 98.75% mandible).

Two Simulation Cases to Prepare for a Public Festival: Pediatric Methylenedioxymethamphetamine (MDMA) Ingestion and Alcohol Toxicity

Science.gov (United States)

Mangold, Karen; Cochran, Christina

2018-01-01

Introduction Emergency departments (EDs) see a surge of intoxicated patients during large public summer events. These patients can be distracting and complicated for ED staff to care for. Methods We developed two cases to prepare emergency department staff for an anticipated surge of patients related to a large music festival that occurs proximal to our pediatric hospital. We developed and performed cases of simulated patients with alcohol intoxication and methylenedioxymethamphetamine (MDMA) ingestion to review medical management of these patients, as well as to review many of the social aspects of the cases. We surveyed simulation (sim) session participants to assess the degree to which the sessions were helpful and to glean ideas on how to improve sessions for future use. Results Over the course of two years, we have hosted eight simulations, for a total of 57 participants comprising various healthcare roles. We achieved an 85% response rate in the post-simulation surveys. The sessions were overall well-received and left participants feeling better prepared to care for intoxicated patients. Discussion Despite having a large number of staff from many disciplines working varied schedules, we were able to provide simulation training to many of them in preparation for an expected surge of intoxicated patients. Participants appreciated the training and gave feedback to improve sessions in the future. PMID:29686959

Preparation of solid-state samples of a transition metal coordination compound for synchrotron radiation photoemission studies

CERN Document Server

Crotti, C; Celestino, T; Fontana, S

2003-01-01

The aim of this research was to identify a sample preparation method suitable for the study of transition metal complexes by photoemission spectroscopy with synchrotron radiation as the X-ray source, even in the case where the compound is not evaporable. Solid-phase samples of W(CO) sub 4 (dppe) [dppe=1,2-bis(diphenylphosphino)ethane] were prepared according to different methods and their synchrotron radiation XPS spectra measured. The spectra acquired from samples prepared by spin coating show core level peaks only slightly broader than the spectrum recorded from UHV evaporated samples. Moreover, for these samples the reproducibility of the binding energy values is excellent. The dependence of the spin coating technique on parameters such as solvent and solution concentration, spinning speed and support material was studied. The same preparation method also allowed the acquisition of valence band spectra, the main peaks of which were clearly resolved. The results suggest that use of the spin coating techniqu...

Sacroiliac joint dysfunction: a case study.

Science.gov (United States)

Murray, William

2011-01-01

Pain is a widespread issue in the United States. Nine of 10 Americans regularly suffer from pain, and nearly every person will experience low back pain at one point in their lives. Undertreated or unrelieved pain costs more than $60 billion a year from decreased productivity, lost income, and medical expenses. The ability to diagnose and provide appropriate medical treatment is imperative. This case study examines a 23-year-old Active Duty woman who is preparing to be involuntarily released from military duty for an easily correctable medical condition. She has complained of chronic low back pain that radiates into her hip and down her leg since experiencing a work-related injury. She has been seen by numerous providers for the previous 11 months before being referred to the chronic pain clinic. Upon the first appointment to the chronic pain clinic, she has been diagnosed with sacroiliac joint dysfunction. This case study will demonstrate the importance of a quality lower back pain assessment.

Non-aqueous metathesis as a general approach to prepare nanodispersed materials: Case study of scheelites

International Nuclear Information System (INIS)

Afanasiev, Pavel

2015-01-01

A general approach to the preparation of inorganic nanoparticles is proposed, using metathesis of precursor salts in non-aqueous liquids. Nanoparticles of scheelites AMO 4 (A=Ba, Sr, Ca; M=Mo, W), were obtained with a quantitative yield. Precipitations in formamide, N-methylformamide, propylene carbonate, DMSO and polyols often provide narrow particle size distributions. Advantageous morphology was explained by strong ionic association in non-aqueous solvents, leading to slow nucleation and negligible Ostwald ripening. Mean particle size below 10 nm and high specific surface areas were obtained for several Ca(Sr)Mo(W)O 4 materials, making them promising for applications as adsorbents or catalysts. Zeta-potential of scheelites in aqueous suspensions showed negative values in a wide range of pH. Systematic study of optical properties demonstrated variation of optical gap in the sequences W>Mo and Ba>Sr>Ca. The observed trends were reproduced by DFT calculations. No quantum confinement effect was observed for small particles, though the surface states induce low-energy features in the optical spectra. - Graphical abstract: Scheelites AMO 4 (A=Ca, Sr, Ba; M=Mo, W) were prepared in various non-aqueous liquids with high specific surface areas and narrow size distributions. The optical gap of scheelites changes in the series Caprepared in various non-aqueous liquids. • Narrow size distributions explained by ionic association in non-aqueous media. • Nanoparticles of less than 10 nm size and highest ever specific surface areas were obtained. • Optical gap of scheelites changes in the series Ca

Self-Mapping in Treating Suicide Ideation: A Case Study

Science.gov (United States)

Robertson, Lloyd Hawkeye

2011-01-01

This case study traces the development and use of a self-mapping exercise in the treatment of a youth who had been at risk for re-attempting suicide. A life skills exercise was modified to identify units of culture called "memes" from which a map of the youth's self was prepared. A successful treatment plan followed the mapping exercise. The…

An automatic tooth preparation technique: A preliminary study

Science.gov (United States)

Yuan, Fusong; Wang, Yong; Zhang, Yaopeng; Sun, Yuchun; Wang, Dangxiao; Lyu, Peijun

2016-04-01

The aim of this study is to validate the feasibility and accuracy of a new automatic tooth preparation technique in dental healthcare. An automatic tooth preparation robotic device with three-dimensional motion planning software was developed, which controlled an ultra-short pulse laser (USPL) beam (wavelength 1,064 nm, pulse width 15 ps, output power 30 W, and repeat frequency rate 100 kHz) to complete the tooth preparation process. A total of 15 freshly extracted human intact first molars were collected and fixed into a phantom head, and the target preparation shapes of these molars were designed using customised computer-aided design (CAD) software. The accuracy of tooth preparation was evaluated using the Geomagic Studio and Imageware software, and the preparing time of each tooth was recorded. Compared with the target preparation shape, the average shape error of the 15 prepared molars was 0.05-0.17 mm, the preparation depth error of the occlusal surface was approximately 0.097 mm, and the error of the convergence angle was approximately 1.0°. The average preparation time was 17 minutes. These results validated the accuracy and feasibility of the automatic tooth preparation technique.

School District Information Technology Disaster Recovery Planning: An Explanatory Case Study

Science.gov (United States)

Gray, Shaun L.

2017-01-01

Despite research and practitioner articles outlining the importance information technology disaster plans (ITDRPs) to organizational success, barriers have impeded the process of disaster preparation for Burlington County New Jersey school districts. The purpose of this explanatory qualitative case study was to understand how technology leader…

Case Study: Fort Mill High School--A Culture of Continuous Improvement

Science.gov (United States)

Southern Regional Education Board (SREB), 2014

2014-01-01

This is the latest in a series of case studies highlighting best practices High Schools That Work (HSTW) network schools and districts are implementing to prepare students better for further studies and careers. Fort Mill High School is in Fort Mill, South Carolina, an outlying suburb of Charlotte, North Carolina. Fort Mill links high quality…

Cuban Voices: A Case Study of English Language Teacher Education

Science.gov (United States)

Smith, Steven John

2016-01-01

This case study uses qualitative research methods and a postcolonial paradigm to listen to the voices of Cuban teacher educators describing how they educate and prepare English language teachers in Cuba. English language teacher education in Cuba includes features that are considered innovative, contemporary and good practice in the Western world.…

IELTS Preparation Course and Student IELTS Performance: A Case Study in Hong Kong

Science.gov (United States)

Zhengdong, Gan

2009-01-01

Since the University Grants Committee (UGC) selected the academic module of the International English Language Testing System (IELTS) as the common English proficiency assessment for graduating undergraduate degree students in 2002, almost all the tertiary institutions in Hong Kong have offered IELTS preparation courses that aim at providing…

Reading in Preparation for Writing a PhD Thesis: Case Studies of Experiences

Science.gov (United States)

Kwan, Becky S. C.

2009-01-01

The paper presents stories of how a group of doctoral students chose the key disciplinary literature that they read in preparation for their thesis-undertaking (RT). The stories were analyzed in light of current understanding of literature reviewing as a situated practice and theory of doctoral education as socio-cognitive apprenticeship. As the…

Sample preparation with solid phase microextraction and exhaustive extraction approaches: Comparison for challenging cases.

Science.gov (United States)

Boyacı, Ezel; Rodríguez-Lafuente, Ángel; Gorynski, Krzysztof; Mirnaghi, Fatemeh; Souza-Silva, Érica A; Hein, Dietmar; Pawliszyn, Janusz

2015-05-11

preparation approaches and the applicability and capability of each technique for challenging cases such as complex matrices, on-site applications and automation. Copyright © 2014 Elsevier B.V. All rights reserved.

Multisite Case Study of Florida's Millennium High School Reform Model

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Carol A. Mullen

2002-10-01

Full Text Available This study should have immediate utility for the United States and beyond its borders. School-to-work approaches to comprehensive reform are increasingly expected of schools while legislative funding for this purpose gets pulled back. This multisite case study launches the first analysis of the New Millennium High School (NMHS model in Florida. This improvement program relies upon exemplary leadership for preparing students for postsecondary education

Preparation of Social Studies Teachers at Major Research Universities.

Science.gov (United States)

Dumas, Wayne

1993-01-01

Reports on a study of the preparation of secondary social studies teachers at major state-supported research universities. Finds relatively few institutions have followed the Holmes Group recommendations and many continue to prepare broad field social studies teachers leaving them deficient in some social science fields. (CFR)

Three-Dimensional Implant Positioning with a Piezosurgery Implant Site Preparation Technique and an Intraoral Surgical Navigation System: Case Report.

Science.gov (United States)

Pellegrino, Gerardo; Taraschi, Valerio; Vercellotti, Tomaso; Ben-Nissan, Besim; Marchetti, Claudio

This case report describes new implant site preparation techniques joining the benefits of using an intraoral navigation system to optimize three-dimensional implant site positioning in combination with an ultrasonic osteotomy. A report of five patients is presented, and the implant positions as planned in the navigation software with the postoperative scan image were compared. The preliminary results are useful, although further clinical studies with larger populations are needed to confirm these findings.

Qualitative case study data analysis: an example from practice.

Science.gov (United States)

Houghton, Catherine; Murphy, Kathy; Shaw, David; Casey, Dympna

2015-05-01

To illustrate an approach to data analysis in qualitative case study methodology. There is often little detail in case study research about how data were analysed. However, it is important that comprehensive analysis procedures are used because there are often large sets of data from multiple sources of evidence. Furthermore, the ability to describe in detail how the analysis was conducted ensures rigour in reporting qualitative research. The research example used is a multiple case study that explored the role of the clinical skills laboratory in preparing students for the real world of practice. Data analysis was conducted using a framework guided by the four stages of analysis outlined by Morse ( 1994 ): comprehending, synthesising, theorising and recontextualising. The specific strategies for analysis in these stages centred on the work of Miles and Huberman ( 1994 ), which has been successfully used in case study research. The data were managed using NVivo software. Literature examining qualitative data analysis was reviewed and strategies illustrated by the case study example provided. Discussion Each stage of the analysis framework is described with illustration from the research example for the purpose of highlighting the benefits of a systematic approach to handling large data sets from multiple sources. By providing an example of how each stage of the analysis was conducted, it is hoped that researchers will be able to consider the benefits of such an approach to their own case study analysis. This paper illustrates specific strategies that can be employed when conducting data analysis in case study research and other qualitative research designs.

[Preparation of sedation-analgesia procedures in spanish paediatric emergency departments: A descriptive study].

Science.gov (United States)

Míguez Navarro, Concepción; Oikonomopoulou, Niki; Lorente Romero, Jorge; Vázquez López, Paula

2017-07-24

The objective of this study was to describe the current practice regarding the preparation of the sedation-analgesia (SA) procedures performed in the paediatric emergency centres in Spain. A multicentre, observational and prospective analytical study was carried out on the SA procedures that were performed on children under 18 years-old in 18 paediatric emergency departments between February 2015 and January 2016. A total of 658 SA procedures were registered in 18 hospitals of Spain, most of them to children older than 24 months. The type of the procedure was: simple analgesia in 57 (8.6%), sedation in 44 (6.7%), SA for a not very painful procedure in 275 (41.8%), and SA for a very painful procedure in 282 (42.9%). Informed consent was requested in 98.6% of the cases. The written form was more frequently preferred in the group of patients that received SA for a very painful procedure (76.6%) in comparison to a painful procedure or to simple analgesia (62.9% and 54.4%, respectively, P<.001). The staff that most frequently performed the SA procedures were the paediatricians of the emergency departments (64.3%), followed by Paediatrics Residents (30.7%). The most frequent reasons for the SA were traumatological (35.9%) and surgical (28.4%). Fasting was observed in 81% of the cases. More than two-thirds (67.3%, n=480) children were monitored, the majority (95.8%) of them using pulse oximetry. The pharmacological strategy used was the administration of one drug in 443 (67.3%) of the cases, mostly nitrous oxide, and a combination of drugs in 215 (32.7%), especially midazolam/ketamine (46.9%). The majority of the SA procedures analysed in this study have been carried out correctly and prepared in accordance with the current guidelines. Copyright © 2017. Publicado por Elsevier España, S.L.U.

Preparing Safety Cases for Operating Outside Prescriptive Fatigue Risk Management Regulations.

Science.gov (United States)

Gander, Philippa; Mangie, Jim; Wu, Lora; van den Berg, Margo; Signal, Leigh; Phillips, Adrienne

2017-07-01

Transport operators seeking to operate outside prescriptive fatigue management regulations are typically required to present a safety case justifying how they will manage the associated risk. This paper details a method for constructing a successful safety case. The method includes four elements: 1) scope (prescriptive rules and operations affected); 2) risk assessment; 3) risk mitigation strategies; and 4) monitoring ongoing risk. A successful safety case illustrates this method. It enables landing pilots in 3-pilot crews to choose the second or third in-flight rest break, rather than the regulatory requirement to take the third break. Scope was defined using a month of scheduled flights that would be covered (N = 4151). These were analyzed in the risk assessment using existing literature on factors affecting fatigue to estimate the maximum time awake at top of descent and sleep opportunities in each break. Additionally, limited data collected before the new regulations showed that pilots flying at landing chose the third break on only 6% of flights. A prospective survey comparing subjective reports (N = 280) of sleep in the second vs. third break and fatigue and sleepiness ratings at top of descent confirmed that the third break is not consistently superior. The safety case also summarized established systems for fatigue monitoring, risk assessment and hazard identification, and multiple fatigue mitigation strategies that are in place. Other successful safety cases have used this method. The evidence required depends on the expected level of risk and should evolve as experience with fatigue risk management systems builds.Gander P, Mangie J, Wu L, van den Berg M, Signal L, Phillips A. Preparing safety cases for operating outside prescriptive fatigue risk management regulations. Aerosp Med Hum Perform. 2017; 88(7):688-696.

Preparation of fish material for interlaboratory study on PFCs

NARCIS (Netherlands)

Korytar, P.; Kwadijk, C.J.A.F.; Lohman, M.; Barneveld, van E.

2007-01-01

The Institute for Environmental Studies, Vrije Universiteit (IVM) has requested Wageningen IMARES for the preparation of fish material for use in interDlaboratory performance study on analysis of perfluorinated compounds (PFCs). It was requested that the material should be prepared from fillet of

Role of radionuclide studies in cases of enlarged prostate

International Nuclear Information System (INIS)

Singhvi, S.D.; Shrimali, R.; Singhal, N.C.

1985-01-01

The present study of radionuclide 131 I hyppuran in 30 positive cases of enlarged prostate and 10 normal subjects has been found effective in giving information about functional status of the kidneys and presence of obstructive unropathy by renography, enlargement of the prostate causing bladder base contour deformity in bladder scan and the presence of residual urine by external counting method over bladder. It is a non-invasive method of investigation and can be undertaken safely in cases sensitive iodine-containing contrast medium. It is also cheap, easy to perform and does not require any pre-examination preparation and can be repeated frequently. (author)

Are Science Teachers Prepared to Promote Argumentation? A Case Study with Pre-Service Teachers in Bogotá City

Science.gov (United States)

Archila, Pablo Antonio

2014-01-01

This paper addresses the importance of argumentation in science education. A research project was done in order to know how a group of pre-service chemistry teachers has been prepared to promote students' argumentation. A Chemistry degree studies plan from a Colombian university was surveyed, and 18 future teachers' representations about…

CASE STUDY CRITIQUE; UPPER CLINCH CASE STUDY

Science.gov (United States)

Case study critique: Upper Clinch case study (from Research on Methods for Integrating Ecological Economics and Ecological Risk Assessment: A Trade-off Weighted Index Approach to Integrating Economics and Ecological Risk Assessment). This critique answers the questions: 1) does ...

Pharmaceutical studies on and clinical application of olanzapine suppositories prepared as a hospital preparation

OpenAIRE

Matsumoto, Kazuaki; Kimura, Satoru; Takahashi, Kenichi; Yokoyama, Yuta; Miyazawa, Masayuki; Kushibiki, Satoko; Katamachi, Morio; Kizu, Junko

2016-01-01

Background A new formulation of olanzapine available for terminally ill patients is needed. Rectal administration using suppositories is an alternative for patients for whom administration via the oral route is not feasible. In the present study, we prepared olanzapine suppositories, and confirmed using pharmaceutical tests. Furthermore, we demonstrated the efficacy and safety of olanzapine suppositories in terminally ill patients. Methods We prepared olanzapine suppositories using bases cons...

Climate Change Vulnerability Assessments: Four Case Studies of Water Utility Practices (2011 Final)

Science.gov (United States)

EPA has released the final report titled, Climate Change Vulnerability Assessments: Four Case Studies of Water Utility Practices. This report was prepared by the National Center for Environmental Assessment's Global Climate Research Staff in the Office of Research and D...

Patient preparation for nuclear medicine studies

International Nuclear Information System (INIS)

Stathis, V.J.; Cantrell, D.W.; Cantrell, T.J.

1987-01-01

In this chapter are described methods of patient preparation that can favorably affect the outcome of nuclear medicine studies in specific situations. Some of these practices may be considered essential to the success of the nuclear medicine procedure, whereas others may be thought of simply as a means of obtaining more valid or reliable information. Regardless of relative importance, each of the preparatory methods discussed can contribute to the quality of the respective study and can serve as a means of maximizing the value of nuclear medicine procedures. The specific patient preparation techniques discussed in this chapter may not be readily applicable to every practice setting or situation. These or similar procedures can be used or modified as necessary. It is important, however, that when new protocols are developed, the rationale and theoretical basis of each technique be considered

KNBK for preparing well shafts for lowering casings

Energy Technology Data Exchange (ETDEWEB)

Sukhanov, V B; Shchukin, R K

1981-01-01

The experience of preparing a well for reinforcement in the association ''Kuban'morneftegaz orom'' is shown using traditional KNBK of increasing hardness after the end of drilling the interval and KNBK included in the above-bit area of the flywheel, UBTS or blade stabilizers whose outer diameter is determined by calculation, and guarantees preparation of the shaft for reinforcement during rotary drilling.

Case study application of the IAEA safeguards assessment methodology to a mixed oxide fuel fabrication facility

International Nuclear Information System (INIS)

Swartz, J.; McDaniel, T.

1981-01-01

Science Applications, Inc. has prepared a case study illustrating the application of an assessment methodology to an international system for safeguarding mixed oxide (MOX) fuel fabrication facilities. This study is the second in a series of case studies which support an effort by the International Atomic Energy Agency (IAEA) and an international Consultant Group to develop a methodology for assessing the effectiveness of IAEA safeguards. 3 refs

Analysis of the learning curve for pre-cut corneal specimens in preparation for lamellar transplantation: a prospective, single-centre, consecutive case series prepared at the Lions New South Wales Eye Bank.

Science.gov (United States)

Martin, Aifric Isabel; Devasahayam, Rajnesh; Hodge, Christopher; Cooper, Simon; Sutton, Gerard L

2017-09-01

This study is the first paper to establish a learning curve by a single technician. Preparation of pre-cut corneal endothelial grafts commenced at Lions New South Wales Eye Bank in December 2014. The primary objective of this study was to review the safety and reliability of the preparation method during the first year of production. This is a hospital-based, prospective case series. There were 234 consecutive donor corneal lenticules. Donor lenticules were prepared by a single operator using a linear cutting microkeratome. Immediately prior to cutting, central corneal thickness values were recorded. Measurements of the corneal bed were taken immediately following lenticule preparation. Outcomes were separated by blade sizes, and intended thickness was compared to actual thickness for each setting. Early specimens were compared to later ones to assess for a learning curve within the technique. The main parameter measured is the mean difference from intended lamellar cut thickness. The mean final cut thickness was 122.36 ± 20.35 μm, and the mean difference from intended cut was 30.17 ± 37.45 μm. No significant difference was found between results achieved with early specimens versus those achieved with later specimens (P = 0.425). Thin, reproducible endothelial grafts can routinely be produced by trained technicians at their respective eye banks without significant concerns for an extended learning curve. This service can reduce perioperative surgical complexity, required surgical paraphernalia and theatre times. The consistent preparation of single-pass, ultrathin pre-cut corneas may have additional advantages for surgeons seeking to introduce lamellar techniques. © 2017 Royal Australian and New Zealand College of Ophthalmologists.

Study on fluorouracil–chitosan nanoparticle preparation and its antitumor effect

Directory of Open Access Journals (Sweden)

Gaimin Chen

2016-05-01

Full Text Available To successfully prepare fluorouracil–chitosan nanoparticles, and further analyze its anti-tumor activity mechanism, this paper makes a comprehensive study of existing preparation prescription and makes a detailed analysis of fluorouracil–chitosan in vitro release and pharmacodynamic behavior of animals. Two-step synthesis method is adopted to prepare 5-FU–CS–mPEG prodrugs, and infrared, 1H NMR and differential thermal analysis are adopted to analyze characterization synthetic products of prepared drugs. To ensure clinical efficacy of prepared drugs, UV spectrophotometry is adopted for determination of drug loading capacity of prepared drugs, transmission electron microscopy is adopted to observe the appearance, dynamic dialysis method is used to observe in vitro drug release of prepared drugs and fitting of various release models is done. Anti-tumor effect is studied via level of animal pharmacodynamics. After the end of the experiment, tumor inhibition rate, spleen index and thymus index of drugs are calculated. Experimental results show that the prepared drugs are qualified in terms of regular shape, dispersion, drug content, etc. Animal pharmacodynamics experiments have shown that concentration level of drug loading capacity of prepared drugs has a direct impact on anti-tumor rate. The higher the concentration, the higher the anti-tumor rate. Results of pathological tissue sections of mice show that the prepared drugs cause varying degrees of damage to receptor cells, resulting in cell necrosis or apoptosis problem. It can thus be concluded that ion gel method is an effective method to prepare drug-loading nanoparticles, with prepared nanoparticles evenly distributed in regular shape which demonstrate good slow-release characteristics in receptor vitro and vivo. At the same time, after completion of drug preparation, relatively strong anti-tumor activity can be generated for the receptor, so this mode of preparation enjoys broad

EXAFS and XRD studies of nanocrystalline cerium oxide: the effect of preparation method on the microstructure

International Nuclear Information System (INIS)

Savin, S.L.P.; Chadwick, A.V.; Smith, M.E.; O'Dell, L.A.

2007-01-01

There is considerable interest in nanocrystalline materials due to their unusual properties, such as enhanced ionic conductivity in the case of nanocrystalline ionic solids. This has potential commercial applications, particularly for oxide ion conductors. However, a detailed knowledge of the microstructure is important in fully understanding the novel properties exhibited by nanocrystalline materials. The final microstructure of a material is dependent on the preparation method used, for example, sol-gel and ball-milling methods are commonly used in the preparation of nanocrystalline oxides. Additionally, there is a problem in maintaining the materials in nanocrystalline form when they are subjected to elevated temperatures. We have been exploring strategies to restrict the growth of nanocrystalline oxides and have found that adding a small amount of an inert material, e.g. SiO 2 or Al 2 O 3 , is particularly effective. We will report XRD and EXAFS studies of nanocrystalline ceria prepared by sol-gel, sol-gel pinned and ball-milling methods and the effect of preparation method on the final microstructure. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Preparing Teachers to Deliver Gender-Focused Sexuality/HIV Education: A Case Study from Nigeria

Science.gov (United States)

Wood, Susan Y.; Rogow, Deborah; Stines, Frederica

2015-01-01

Evidence shows that a focus on gender and power in sexuality/HIV education increases the likelihood of achieving positive sexual health outcomes, and international agencies have called for a shift to a gender-focused approach. However, questions remain about the implementation of such programmes, including how best to prepare teachers to deliver…

A case series of the effects of a novel composition of a traditional natural preparation for the treatment of psoriasis

Directory of Open Access Journals (Sweden)

A. Michalsen

2016-10-01

Full Text Available The objective of this study was to assess the effectiveness of a specific composition of a traditional herbal preparation (DurrDerma in adult patients with moderate to severe skin psoriasis. The preparation is a newly developed topical combination containing plant-based extracts traditionally used in skin disease as black cumin, olive oil, tea tree oil, cocoa butter completed by vitamin A and vitamin B12. We documented the effectiveness of the preparation in a first case series. A total of 12 patients (8 males and 4 females, 21–86 y with manifest and treatment-resistant psoriasis were included and treated for 12 weeks. All patients were assigned to twice-daily treatment with the DurrDerma preparation. Treatment success as determined by the Psoriasis Area and Severity Index (PASI score, the body surface area, and the dermatology life index was achieved (PASI reduction of >75% in 10 of the 12 treated patients (83%. The remaining two patients showed a PASI reduction of ≤50%. In 5 of the patients PASI reduction was achieved <12 weeks (between week 3–11. The beneficial effect in responder patients might be explained by a synergistic anti-oxidative and anti inflammatory activity of all components present in DurrDerma. We conclude that the new preparation using a traditional approach seems to be a promising complementary treatment for psoriasis.

Performance study of molybdenum gels with titanium for preparation of 99Mo-99mTc generators

International Nuclear Information System (INIS)

Moraes, Vanessa; Osso Junior, Joao Alberto

2005-01-01

99m Tc is the most used radioisotope in Nuclear Medicine, due to nuclear characteristics. It is obtained by the radioactive decay of 99 Mo, generator of radioisotope system. When 99 Mo is produced by the activation in reactor, the most used technique for the preparation of the generators is the gel type generator, which incorporates 99 Mo to the gel that is insoluble, chemically inert to the solutions and with properties of ion exchange. Several countries had already studied this methodology, as is the case of Vietnam, India, China, Australian. This work has the objective of studying the performance and characterization of molybdenum gels with titanium. Four variables in the preparation of the gel were studied: mass ratio between Mo and Ti (1.80 and 2.25), concentration of NaOH (2 and 4 mol/L), final temperature (25 and 50 deg C) and pH (3.5 and 4.5). The prepared gels were analyzed with relation to the size of its particles, identification of its structure, amount of molybdenum, amount of titanium, profile of elution, pH of the elution, determination of the radioisotopes in the eluate and final radiochemical purity. The final result is a formularization of the gel with the best characteristics for posterior preparation of the generator of 99m Tc- 99 Mo. (author)

Finding Boundaries Inside Prison Walls: Case Study of a Terminally Ill Inmate

Science.gov (United States)

O'Connor, Mary-Frances

2004-01-01

The number of terminally ill prison inmates rises each year. Mental health professionals are uniquely prepared to provide therapy during the end-of-life process with their assessment, training, empathy, and communication skills. This case study examines the six-month therapy of one terminally ill inmate, using a client-centered approach. Drawing…

A new dietary model to study colorectal carcinogenesis: experimental design, food preparation, and experimental findings.

Science.gov (United States)

Rozen, P; Liberman, V; Lubin, F; Angel, S; Owen, R; Trostler, N; Shkolnik, T; Kritchevsky, D

1996-01-01

Experimental dietary studies of human colorectal carcinogenesis are usually based on the AIN-76A diet, which is dissimilar to human food in source, preparation, and content. The aims of this study were to examine the feasibility of preparing and feeding rats the diet of a specific human population at risk for colorectal neoplasia and to determine whether changes in the colonic morphology and metabolic contents would differ from those resulting from a standard rat diet. The mean daily food intake composition of a previously evaluated adenoma patient case-control study was used for the "human adenoma" (HA) experimental diet. Foods were prepared as for usual human consumption and processed by dehydration to the physical characteristics of an animal diet. Sixty-four female Sprague-Dawley rats were randomized and fed ad libitum the HA or the AIN-76A diet. Every eight weeks, eight rats from each group were sacrificed, and the colons and contents were examined. Analysis of the prepared food showed no significant deleterious changes; food intake and weight gain were similar in both groups. Compared with the controls, the colonic contents of rats fed the HA diet contained significantly less calcium, concentrations of neutral sterols, total lipids, and cholic and deoxycholic acids were increased, and there were no colonic histological changes other than significant epithelial hyperproliferation. This initial study demonstrated that the HA diet can be successfully processed for feeding to experimental animals and is acceptable and adequate for growth but induces significant metabolic and hyperproliferative changes in the rat colon. This dietary model may be useful for studies of human food, narrowing the gap between animal experimentation and human nutritional research.

New preparation of fish material for interlaboratory study on PFCs

NARCIS (Netherlands)

Korytar, P.; Lohman, M.; Kwadijk, C.J.A.F.; Barneveld, van E.

2007-01-01

The Institute for Environmental Studies, Vrije Universiteit (IVM) has requested Wageningen IMARES to prepare a new fish material for use in the interlaboratory performance study on analysis of perfluorinated compounds (PFCs) due to the low amount of contaminants in the previously prepared material.

A phenomenological case study concerning science teacher educators' beliefs and teaching practices about culturally relevant pedagogy and preparing K-12 science teachers to engage African American students in K-12 science

Science.gov (United States)

Underwood, Janice Bell

Due to the rising diversity in today's schools, science teacher educators (STEs) suggest that K-12 teachers must be uniquely prepared to engage these students in science classrooms. Yet, in light of the increasing white-black science achievement gap, it is unclear how STEs prepare preservice teachers to engage diverse students, and African Americans in particular. Therefore, the purpose of this study was to find out how STEs prepare preservice teachers to engage African American students in K-12 science. Thus, using the culturally relevant pedagogy (CRP) framework, this phenomenological case study explored beliefs about culturally relevant science teaching and the influence of reported beliefs and experiences related to race on STEs' teaching practices. In the first phase, STE's in a mid-Atlantic state were invited to participate in an electronic survey. In the second phase, four participants, who were identified as exemplars, were selected from the survey to participate in three semi-structured interviews. The data revealed that STEs were more familiar with culturally responsive pedagogy (CResP) in the context of their post-secondary classrooms as opposed to CRP. Further, most of the participants in part one and two described modeling conventional ways they prepare their preservice teachers to engage K-12 students, who represent all types of diversity, without singling out any specific race. Lastly, many of the STEs' in this study reported formative experiences related to race and beliefs in various manifestations of racism have impacted their teaching beliefs and practices. The findings of this study suggest STEs do not have a genuine understanding of the differences between CRP and CResP and by in large embrace CResP principles. Secondly, in regards to preparing preservice teachers to engage African American students in science, the participants in this study seemed to articulate the need for ideological change, but were unable to demonstrate pedagogical changes

Social disparities in food preparation behaviours: a DEDIPAC study.

Science.gov (United States)

Méjean, Caroline; Si Hassen, Wendy; Gojard, Séverine; Ducrot, Pauline; Lampuré, Aurélie; Brug, Hans; Lien, Nanna; Nicolaou, Mary; Holdsworth, Michelle; Terragni, Laura; Hercberg, Serge; Castetbon, Katia

2017-09-20

The specific role of major socio-economic indicators in influencing food preparation behaviours could reveal distinct socio-economic patterns, thus enabling mechanisms to be understood that contribute to social inequalities in health. This study investigated whether there was an independent association of each socio-economic indicator (education, occupation, income) with food preparation behaviours. A total of 62,373 adults participating in the web-based NutriNet-Santé cohort study were included in our cross-sectional analyses. Cooking skills, preparation from scratch and kitchen equipment were assessed using a 0-10-point score; frequency of meal preparation, enjoyment of cooking and willingness to cook better/more frequently were categorical variables. Independent associations between socio-economic factors (education, income and occupation) and food preparation behaviours were assessed using analysis of covariance and logistic regression models stratified by sex. The models simultaneously included the three socio-economic indicators, adjusting for age, household composition and whether or not they were the main cook in the household. Participants with the lowest education, the lowest income group and female manual and office workers spent more time preparing food daily than participants with the highest education, those with the highest income and managerial staff (P cooks than those with the highest education level (Women: OR = 3.36 (1.69;6.69); Men: OR = 1.83 (1.07;3.16)) while female manual and office workers and the never-employed were less likely to be non-cooks (OR = 0.52 (0.28;0.97); OR = 0.30 (0.11;0.77)). Female manual and office workers had lower scores of preparation from scratch and were less likely to want to cook more frequently than managerial staff (P cooking meal daily (OR = 0.68 (0.45;0.86)) than those with the highest income. Lowest socio-economic groups, particularly women, spend more time preparing food than high socioeconomic

Capturing Cultural Glossaries: Case-study II

Directory of Open Access Journals (Sweden)

Matete Madiba

2011-10-01

Full Text Available

ABSTRACT: This case-study attempts to present a brief glossary of Northern Sotho medical terms. It is a follow-up of a similar case-study (Madiba, Mphahlele and Kganyago 2003, which was an attempt to capture and present Northern Sotho cooking terms. Case-study I consists of the names for utensils, ingredients and the processes involved in the preparation of cultural dishes. With both these case-studies, the intention has been to use the opportunities availing themselves for the pres-ervation and valorisation of Northern Sotho, including the extension of its corpora to support national dictionary-making processes. The case-study methodology has been very useful for the purposes of this project and the context within which it was undertaken. It aims to provide a model for the collection and presentation of authentic Northern Sotho terminology which otherwise would hardly have been accessible.

Keywords: CULTURAL GLOSSARY, INDIGENOUS KNOWLEDGE SYSTEMS, CORPUS, OUTCOMES-BASED EDUCATION, ASSESSMENT CRITERIA, TRADITIONAL MEDICAL TERMS, COMMUNICATIVE APPROACH, STRUCTURAL APPROACH, METONYMY, HANDS-ON ACTIVITIES, TASK-BASED LEARNING

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OPSOMMING: Die totstandbrenging van kulturele woordversamelings: Ge-vallestudie II. Hierdie gevallestudie probeer om 'n beperkte woordelys van Noord-Sotho- mediese terme aan te bied. Dit is 'n voortsetting van 'n soortgelyke gevallestudie (Madiba, Mpha-hlele en Kganyago 2003 wat 'n poging was om Noord-Sothokookterme te versamel en aan te bied. Gevallestudie I bestaan uit die name van gereedskap, bestanddele, en die prosesse betrokke by die voorbereiding van kulturele geregte. Met altwee hierdie gevallestudies was die bedoeling om die geleenthede te gebruik wat hulleself aanbied vir die bewaring en bestendiging van Noord-Sotho, insluitende die uitbreiding van sy korpora om die nasionale woordeboeksamestellingsprosesse te ondersteun. Die gevallestudiemetodologie was baie nuttig vir die doeleindes van

Leukocytospermia and sperm preparation - a flow cytometric study

Directory of Open Access Journals (Sweden)

Perticarari Sandra

2009-01-01

Full Text Available Abstract Background Leukocytes represent the predominant source of reactive oxygen species both in seminal plasma and in sperm suspensions and have been demonstrated to negatively influence sperm function and fertilization rate in assisted reproduction procedures. Peroxidase test is the standard method recommended by WHO to detect semen leukocytes but it may be inaccurate. The aims of this study were (i to compare the efficiency of swim-up and density-gradient centrifugation techniques in removing seminal leukocytes, (ii to examine the effect of leukocytes on sperm preparation, and (iii to compare flow cytometry and peroxidase test in determining leukocyte concentration in semen using a multiparameter flow cytometric method. Methods Semen samples from 126 male partners of couples undergoing infertility investigations were analyzed for leukocytospermia using standard optical microscopy and flow cytometry. Sixty-nine out of 126 samples were also processed using simultaneously the swim-up and density-gradient centrifugation techniques. A multiparameter flow cytometric analysis to assess simultaneously sperm concentration, sperm viability, sperm apoptosis, and leukocyte concentration was carried out on neat and prepared sperm. Results Both sperm preparation methods removed most seminal leukocytes. However, the concentration of leukocytes was significantly lower after swim-up compared to that after density-gradient centrifugation preparation. Leukocytes concentration, either initial or in prepared fractions, was not correlated with sperm parameters (optical microscopy and flow cytometry parameters after semen processing. There was no correlation between leukocyte concentration in the ejaculate and sperm recovery rate, whereas a significant correlation was found between the concentration of the residual leukocytes in prepared fractions and viable sperm recovery rate. Although the overall concordance between the flow cytometry and the optical

Studying abroad: a multiple case study of nursing students' international experiences.

Science.gov (United States)

Green, Barbara F; Johansson, Inez; Rosser, Megan; Tengnah, Cassam; Segrott, Jeremy

2008-11-01

This paper examines the experiences of nursing students undertaking an international placement during their pre-registration education. The study took place in two schools--one in the United Kingdom, and one in Sweden. The move of nursing education into higher education enabled students to participate in international exchange programmes. Previous research demonstrates that students participating in such programmes may gain enhanced cultural awareness and experience personal and professional growth. The study comprised a multiple case study, utilising semi-structured individual and group interviews and documentary analysis. Eighteen students from the UK and 14 from Sweden participated. Participants described an increase in confidence, self-reliance and professional knowledge and skills resulting from their international placement. There was an awareness of how healthcare roles differ between countries and a change in attitudes to others from different backgrounds and cultures. The differences between the two cases were marginal. Whilst there was support from both home and host universities this varied between the international placement providers. The international placements were beneficial; however, there is a need for change in the preparation, support and monitoring of students, greater engagement with the partner institutions, and more effective mentoring of staff.

Comparison of a new hydro-surgical technique to traditional methods for the preparation of full-thickness skin grafts from canine cadaveric skin and report of a single clinical case.

Science.gov (United States)

Townsend, F I; Ralphs, S C; Coronado, G; Sweet, D C; Ward, J; Bloch, C P

2012-01-01

To compare the hydro-surgical technique to traditional techniques for removal of subcutaneous tissue in the preparation of full-thickness skin grafts. Ex vivo experimental study and a single clinical case report. Four canine cadavers and a single clinical case. Four sections of skin were harvested from the lateral flank of recently euthanatized dogs. Traditional preparation methods used included both a blade or scissors technique, each of which were compared to the hydro-surgical technique individually. Preparation methods were compared based on length of time for removal of the subcutaneous tissue from the graft, histologic grading, and measurable thickness as compared to an untreated sample. The hydro-surgical technique had the shortest skin graft preparation time as compared to traditional techniques (p = 0.002). There was no significant difference in the histological grading or measurable subcutaneous thickness between skin specimens. The hydro-surgical technique provides a rapid, effective debridement of subcutaneous tissue in the preparation of full-thickness skin grafts. There were not any significant changes in histological grade and subcutaneous tissue remaining among all treatment types. Additionally the hydro-surgical technique was successfully used to prepare a full-thickness meshed free skin graft in the reconstruction of a traumatic medial tarsal wound in a dog.

Dietary Intake, Body Composition, and Menstrual Cycle Changes during Competition Preparation and Recovery in a Drug-Free Figure Competitor: A Case Study

Science.gov (United States)

Halliday, Tanya M.; Loenneke, Jeremy P.; Davy, Brenda M.

2016-01-01

Physique competitions are events in which competitors are judged on muscular appearance and symmetry. The purpose of this retrospective case study was to describe changes in dietary intake, body mass/composition, and the menstrual cycle during the 20-week competition preparation (PREP) and 20-week post competition recovery (REC) periods of a drug-free amateur female figure competitor (age = 26–27, BMI = 19.5 kg/m2). Dietary intake (via weighed food records) and body mass were assessed daily and averaged weekly. Body composition was estimated via Dual-energy X-ray absorptiometry (DXA) and 7-site skinfold measurements. Energy intake, body mass and composition, and energy availability decreased during the 20-week PREP period (changes of ~298 kcals, 5.1 kg, 6.5% body fat, and 5.4 kcal/kg fat free mass, respectively) and returned to baseline values by end of the 20-week REC period. Menstrual cycle irregularity was reported within the first month of PREP and the last menstruation was reported at week 11 of PREP. Given the potentially adverse health outcomes associated with caloric restriction, future, prospective cohort studies on the physiological response to PREP and REC are warranted in drug-free, female physique competitors. PMID:27879627

Study of dosimetric properties of acetylsalicylic acid in pharmaceutical preparations by EPR spectroscopy

International Nuclear Information System (INIS)

Juarez-Calderon, J.M.; Negron-Mendoza, A.; Ramos-Bernal, S.; Gomez-Vidales, V.

2009-01-01

Electron paramagnetic resonance (EPR) was used to investigate the dosimetric properties of two pharmaceutical preparations containing acetylsalicylic acid, Aspirin R and Cafiaspirin R . The EPR spectra of the irradiated samples were found to have an asymmetric absorption characterized by a major resonance at g = 2.0033. Dose response was investigated between dose ranges of 2 to 95 kGy for 60 Co-gamma rays. Fading characteristics and dependence on temperature irradiation were also studied. We suggest that commercial Aspirin R and Cafiaspirin R tablets can be used as dosimeters in the case of a short accident. (author)

PURPA Resource Development in the Pacific Northwest : Case Studies of Ten Electricity Generating Powerplants.

Energy Technology Data Exchange (ETDEWEB)

Washington State Energy Office.

1990-07-01

The case studies in this document describe the Public Utilities, Regulatory Policies Act (PURPA) development process for a variety of generating technologies. Developer interactions with regulatory agencies and power purchasers are described in some detail. Equipment, installation, and maintenance costs are identified; power marketing considerations are taken into account; and potential environmental impacts, with corresponding mitigation approaches and practices are summarized. The project development case studies were prepared by the energy agencies of the four Northwest states, under contract to the Bonneville Power Administration.

Effectiveness of integrating case studies in online and face-to-face instruction of pathophysiology: a comparative study.

Science.gov (United States)

Saleh, Suha M; Asi, Yara M; Hamed, Kastro M

2013-06-01

Due to growing demand from students and facilitated by innovations in educational technology, institutions of higher learning are increasingly offering online courses. Subjects in the hard sciences, such as pathophysiology, have traditionally been taught in the face-to-face format, but growing demand for preclinical science courses has compelled educators to incorporate online components into their classes to promote comprehension. Learning tools such as case studies are being integrated into such courses to aid in student interaction, engagement, and critical thinking skills. Careful assessment of pedagogical techniques is essential; hence, this study aimed to evaluate and compare student perceptions of the use of case studies in face-to-face and fully online pathophysiology classes. A series of case studies was incorporated into the curriculum of a pathophysiology class for both class modes (online and face to face). At the end of the semester, students filled out a survey assessing the effectiveness of the case studies. Both groups offered positive responses about the incorporation of case studies in the curriculum of the pathophysiology class. This study supports the argument that with proper use of innovative teaching tools, such as case studies, online pathophysiology classes can foster a sense of community and interaction that is typically only seen with face-to-face classes, based on student responses. Students also indicated that regardless of class teaching modality, use of case studies facilitates student learning and comprehension as well as prepares them for their future careers in health fields.

Adaptations of International Standards on Educational Leadership Preparation in Egypt

Science.gov (United States)

Purinton, Ted; Khalil, Dalia

2016-01-01

This paper is a case study of one leadership preparation program, utilizing US school leadership standards and practices, offered in Egypt. This case study illuminates how cultural and policy distinctions impact differing necessities of educational leadership, and how those necessities conflict or concur with the international standards and…

Preparation of radioactive tracer for studying sediment movement

International Nuclear Information System (INIS)

Hussain, S.D.; Ghauri, G.A.; Qureshi, M.H.; Khan, N.A.

1983-06-01

In order to study the movement of sediment in harbours, estuaries and streams, artificial sediment in the form of glass is prepared. A preselected nuclide is added to the glass during its manufacture. The density and size distribution of the glass particles is method with that of the natural sediment. The activation of the artificial sediment in a reactor changes the nuclide into a radioactive isotope thereby tagging it and making it possible to trace its movement with suitable radiation detector. The method of tracer preparation is described with special reference to sadiment movement studies at Karachi harbour. (authors)

[Therapeutic characteristance and tolerance of topical comfrey preparations. Results of an observational study of patients].

Science.gov (United States)

Koll, R; Klingenburg, S

2002-01-01

To analyze the anti-inflammatory and analgetic properties of the topical comfrey, preparations Kytta-Salbe f, Kytta-Plasma f and Kytta-Balsam f applied to bruises, sprains and distortions and painful conditions of the muscles and joints. A prospective open multicentric observational study complying with paragraph 67(6) of the AMG and involving 162 general practitioners. During the two-week period of observation, the patients received an average of one to three applications of the comfrey preparation per day. All 492 questionnaires were evaluated. Efficacy and tolerability were assessed by both physician and patient. Pain at rest and on movement, as also tenderness, improved in the overall observation group by an average of 45-47%. The duration of morning joint stiffness decreased from 20 minutes initially to 3 minutes. During the course of treatment with comfrey, more than two-thirds of the patients were able to reduce or even discontinue their intake of non-steroidal anti-inflammatory drugs and other specific concomitant medication. In most of the cases, both effectiveness and tolerability were assessed to be excellent or good. The results of the study confirm the effectiveness and tolerability of the topical comfrey preparation investigated in the treatment of bruises, sprains and distortions as well as painful conditions affecting muscles and joints.

HydroGEM, a hydrogen fuelled utility vehicle. Case study

International Nuclear Information System (INIS)

Hoevenaars, A.J.; Kraaij, G.J.; De Bruijne, M.; Weeda, M.

2010-02-01

This report describes the conversion of a Global Electric Motorcars (GEM, a Chrysler company) electric utility vehicle into a Fuel Cell Vehicle called HydroGEM, at the Energy research Centre of the Netherlands (ECN). The report is prepared as a case study within the framework of Task 18 on 'Evaluation of Integrated Hydrogen Systems' of the IEA Hydrogen Implementing Agreement. The vehicle's fuel cell system was designed in 2005, manufactured and built into the vehicle in 2006 and operated from 2007 onwards. The design-choices, assembly, operation and maintenance-issues are presented and discussed.

Preparing Novice Principals in Australia and Turkey: How Similar Are Their Needs?

Science.gov (United States)

Wildy, Helen; Clarke, Simon; Styles, Irene; Beycioglu, Kadir

2010-01-01

Part of a 13-nation, cross-cultural study of the extent to which principals perceive their pre-appointment experiences had prepared them for the job, the International Study of Principal Preparation (ISPP), this paper compares the responses of novice principals in Turkey and Western Australia. Using a survey based on data from case studies of…

Preparing pre-service teachers to integrate technology into inquiry-based science education: Three case studies in The Netherlands

International Nuclear Information System (INIS)

Tran, Trinh-Ba; Ed van den Berg, Ed; Beishuizen, Jos; Ellermeijer, Ton

2015-01-01

Integration of technology (e.g. measuring with sensors, video measurement, and modeling) into secondary-school science teaching is a need globally recognized. A central issue of incorporating these technologies in teaching is how to turn manipulations of equipment and software into manipulations of ideas. Therefore, preparation for pre-service teachers to apply ICT tools should be combined with the issues of minds-on inquiring and meaning-making. From this perspective, we developed a course within the post-graduate teacher-education program in the Netherlands. During the course, pre-service teachers learnt not only to master ICT skills but also to design, teach, and evaluate an inquiry-based lesson in which the ICT tool was integrated. Besides three life sessions, teachers’ learning scenario also consisted of individual tasks which teachers could carry out mostly in the school or at home with support materials and online assistance. We taught three iterations of the course within a design-research framework in 2013, 2014 and collected data on the teacher learning processes and outcomes. The analyses of these data from observation, interviews, questionnaires, and documents were to evaluate implementation of the course, then suggest for revisions of the course set-up, which was executed and then assessed again in a subsequent case study. Main outcomes of the three case studies can be summarized as follows: within a limited time (3 life sessions spread over 2–3 months), the heterogeneous groups of pre-service teachers achieved a reasonable level of competence regarding the use of ICT tools in inquiry-based lessons. The blended set-up with support materials, especially the Coach activities and the lesson-plan form for an ICT-integrated inquiry-based lesson, contributed to this result under the condition that the course participants really spent considerable time outside the life sessions. There was a need for more time for hands-on, in-group activities in life

Preparing pre-service teachers to integrate technology into inquiry-based science education: Three case studies in The Netherlands

Science.gov (United States)

Tran, Trinh-Ba; van den Berg, Ed; Ellermeijer, Ton; Beishuizen, Jos

2016-05-01

Integration of technology ( e.g. measuring with sensors, video measurement, and modeling) into secondary-school science teaching is a need globally recognized. A central issue of incorporating these technologies in teaching is how to turn manipulations of equipment and software into manipulations of ideas. Therefore, preparation for pre-service teachers to apply ICT tools should be combined with the issues of minds-on inquiring and meaning-making. From this perspective, we developed a course within the post-graduate teacher-education program in the Netherlands. During the course, pre-service teachers learnt not only to master ICT skills but also to design, teach, and evaluate an inquiry-based lesson in which the ICT tool was integrated. Besides three life sessions, teachers' learning scenario also consisted of individual tasks which teachers could carry out mostly in the school or at home with support materials and online assistance. We taught three iterations of the course within a design-research framework in 2013, 2014 and collected data on the teacher learning processes and outcomes. The analyses of these data from observation, interviews, questionnaires, and documents were to evaluate implementation of the course, then suggest for revisions of the course set-up, which was executed and then assessed again in a subsequent case study. Main outcomes of the three case studies can be summarized as follows: within a limited time (3 life sessions spread over 2-3 months), the heterogeneous groups of pre-service teachers achieved a reasonable level of competence regarding the use of ICT tools in inquiry-based lessons. The blended set-up with support materials, especially the Coach activities and the lesson-plan form for an ICT-integrated inquiry-based lesson, contributed to this result under the condition that the course participants really spent considerable time outside the life sessions. There was a need for more time for hands-on, in-group activities in life

Monolith Chromatography as Sample Preparation Step in Virome Studies of Water Samples.

Science.gov (United States)

Gutiérrez-Aguirre, Ion; Kutnjak, Denis; Rački, Nejc; Rupar, Matevž; Ravnikar, Maja

2018-01-01

Viruses exist in aquatic media and many of them use this media as transmission route. Next-generation sequencing (NGS) technologies have opened new doors in virus research, allowing also to reveal a hidden diversity of viral species in aquatic environments. Not surprisingly, many of the newly discovered viruses are found in environmental fresh and marine waters. One of the problems in virome research can be the low amount of viral nucleic acids present in the sample in contrast to the background ones (host, eukaryotic, prokaryotic, environmental). Therefore, virus enrichment prior to NGS is necessary in many cases. In water samples, an added problem resides in the low concentration of viruses typically present in aquatic media. Different concentration strategies have been used to overcome such limitations. CIM monoliths are a new generation of chromatographic supports that due to their particular structural characteristics are very efficient in concentration and purification of viruses. In this chapter, we describe the use of CIM monolithic chromatography for sample preparation step in NGS studies targeting viruses in fresh or marine water. The step-by-step protocol will include a case study where CIM concentration was used to study the virome of a wastewater sample using NGS.

Comparative study of the coprecipitation methods for the preparation of Layered Double Hydroxides

Directory of Open Access Journals (Sweden)

Crepaldi Eduardo L.

2000-01-01

Full Text Available Coprecipitation is the method most frequently applied to prepare Layered Double Hydroxides (LDHs. Two variations of this method can be used, depending on the pH control conditions during the precipitation step. In one case the pH values are allowed to vary while in the other they are kept constant throughout coprecipitation. Although research groups have their preferences, no systematic comparison of the two variations of the coprecipitation method is available in the literature. On this basis, the objective of the present study was to compare the properties of LDHs prepared using the two forms of pH control in the coprecipitation method. The results showed that even though coprecipitation is easier to perform under conditions of variable pH values, materials with more interesting properties, from the point of view of technological applications, are obtained at constant pH. Higher crystallinity, smaller particle size, higher specific surface area and higher average pore diameter were found for materials obtained by coprecipitation at constant pH, when compared to the materials obtained at variable pH.

Physiological profile of a professional boxer preparing for Title Bout: A case study.

Science.gov (United States)

Halperin, Israel; Hughes, Steven; Chapman, Dale W

2016-10-01

This study aimed to (1) profile a professional boxer (23 years and 80 kg) with boxing-specific, muscle function, aerobic capacity and body composition tests, and (2) quantify how these measures varied during an 8-week preparation phase leading to, and post a state-Title Bout fought in the 76.2-kg class. A series of boxing-specific and muscle function tests were completed on 11 occasions: 9 prior and twice after the bout, each separated by approximately 2 weeks. The boxing test included 36 maximal punches (9 of each: lead and rear straights, lead and rear hooks) to a punching integrator measuring forces and velocity. Muscle function tests included countermovement jump, drop-jumps, isometric mid-thigh pull and isometric bench-press. Body composition was assessed using skin-fold measurements on three occasions and one dual energy X-ray absorptiometry scan. Aerobic capacity was assessed using 2 VO2 max tests. Leading up to the bout, performance decreased in isometric mid-thigh pull (8%), isometric bench-press (5%), countermovement jump (15%) and impact forces in 3 of 4 punches (4%-7%). Whereas measures of dynamic and isometric muscle function remained depressed or unchanged post competition, punching forces (6%-15%) and aerobic power (6%) increased. Data suggest the athlete may have super-compensated following rest as fatigue dissipated and further adaptation occurred.

Preservice Teacher Preparation in International Contexts: A Case-Study Examination of the International Student Teacher Programs

Directory of Open Access Journals (Sweden)

W. James Jacob

2010-12-01

Full Text Available This article examines the teacher preparation experiences of preservice teachers in six international contexts: China, Fiji, Kiribati, Mexico, Samoa, and Tonga. More specifically, it looks at the value-added components in an international teacher education program, with an emphasis on effective teaching and employability. Theoretically the study is based on Straus and Corbin’s (1998a substantive grounded theory and Patton’s (1997 Theory of Action Framework. Verbal and non-verbal forms of feedback were identified as essential aspects of the international preservice training experience. Cultural diversity, teaching English as a second language, collaboration, and exposure to a different educational system were identified among several components as advantages to individuals who conduct their preservice teacher training in international settings.

Expanding the classroom with educational technology: A case study of a Cuban polytechnic high school

Directory of Open Access Journals (Sweden)

Anne Leftwich

2014-12-01

Full Text Available Polytechnic instruction has a common place in the Cuban education system (Gasperini, 2000. In polytechnic institutions, teachers leverage technological tools to prepare students for labor market competences. This case study examined a polytechnic institution in Cuba to consider how teachers defined educational technology. Based on teacher questionnaire responses, site-based teacher interviews, and field observations, technology was primarily viewed as a method for student preparation. In other words, teachers used technology to prepare students for their future careers and the technology they will need to be successful in that career. The study found that teachers highly valued their technical pedagogical training, believed that the growing spaces were an integral part of their technology based instruction, and claimed that the limited resources was their greatest barrier to integrating ICT in the classroom.

Prioritized List of Research Needs to support MRWFD Case Study Flowsheet Advancement

Energy Technology Data Exchange (ETDEWEB)

Law, Jack Douglas [Idaho National Lab. (INL), Idaho Falls, ID (United States); Soelberg, Nicholas Ray [Idaho National Lab. (INL), Idaho Falls, ID (United States)

2015-06-17

In FY-13, a case study evaluation was performed of full recycle technologies for both the processing of light-water reactor (LWR) used nuclear fuels as well as fast reactor (FR) fuel in the full recycle option. This effort focused on the identification of the case study processes and the initial preparation of material balance flowsheets for the identified technologies. In identifying the case study flowsheets, it was decided that two cases would be developed: one which identifies the flowsheet as currently developed and another near-term target flowsheet which identifies the flowsheet as envisioned within two years, pending the results of ongoing research. The case study focus is on homogeneous aqueous recycle of the U/TRU resulting from the processing of LWR fuel as feed for metal fuel fabrication. The metal fuel is utilized in a sodium-cooled fast reactor, and the used fast reactor fuel is processed using electrochemical separations. The recovered U/TRU from electrochemical separations is recycled to fuel fabrication and the fast reactor. Waste streams from the aqueous and electrochemical processing are treated and prepared for disposition. Off-gas from the separations and waste processing are also treated. As part of the FY-13 effort, preliminary process unknowns and research needs to advance the near-term target flowsheets were identified. In FY-14, these research needs were updated, expanded and prioritized. This report again updates the prioritized list of research needs based upon results to date in FY-15. The research needs are listed for each of the main portions of the flowsheet: 1) Aqueous headend, 2) Headend tritium pretreatment off-gas, 3) Aqueous U/Pu/Np recovery, 4) Aqueous TRU product solidification, 5) Aqueous actinide/lanthanide separation, 6) Aqueous off-gas treatment, 7) Aqueous HLW management, 8) Treatment of aqueous process wastes, 9) E-chem actinide separations, 10) E-chem off-gas, 11) E-chem HLW management. The identified research needs

Prioritized List of Research Needs to support MRWFD Case Study Flowsheet Advancement

International Nuclear Information System (INIS)

Law, Jack Douglas; Soelberg, Nicholas Ray

2015-01-01

In FY-13, a case study evaluation was performed of full recycle technologies for both the processing of light-water reactor (LWR) used nuclear fuels as well as fast reactor (FR) fuel in the full recycle option. This effort focused on the identification of the case study processes and the initial preparation of material balance flowsheets for the identified technologies. In identifying the case study flowsheets, it was decided that two cases would be developed: one which identifies the flowsheet as currently developed and another near-term target flowsheet which identifies the flowsheet as envisioned within two years, pending the results of ongoing research. The case study focus is on homogeneous aqueous recycle of the U/TRU resulting from the processing of LWR fuel as feed for metal fuel fabrication. The metal fuel is utilized in a sodium-cooled fast reactor, and the used fast reactor fuel is processed using electrochemical separations. The recovered U/TRU from electrochemical separations is recycled to fuel fabrication and the fast reactor. Waste streams from the aqueous and electrochemical processing are treated and prepared for disposition. Off-gas from the separations and waste processing are also treated. As part of the FY-13 effort, preliminary process unknowns and research needs to advance the near-term target flowsheets were identified. In FY-14, these research needs were updated, expanded and prioritized. This report again updates the prioritized list of research needs based upon results to date in FY-15. The research needs are listed for each of the main portions of the flowsheet: 1) Aqueous headend, 2) Headend tritium pretreatment off-gas, 3) Aqueous U/Pu/Np recovery, 4) Aqueous TRU product solidification, 5) Aqueous actinide/lanthanide separation, 6) Aqueous off-gas treatment, 7) Aqueous HLW management, 8) Treatment of aqueous process wastes, 9) E-chem actinide separations, 10) E-chem off-gas, 11) E-chem HLW management. The identified research needs

Studying consumer behaviour related to the quality of food: A case on vegetable preparation affecting sensory and health attributes

NARCIS (Netherlands)

Bongoni, R.; Steenbekkers, L.P.A.; Verkerk, R.; Boekel, van M.A.J.S.; Dekker, M.

2013-01-01

The domestic preparation of vegetables induces a significant change in their sensory and health attributes. The preparation of vegetables by consumers is likely to be controlled by assessing perceivable (sensory) quality attributes such as colour and texture because other quality attributes,

Teamwork--Teach Me, Teach Me Not: A Case Study of Three Australian Preservice Teachers

Science.gov (United States)

Main, Katherine

2010-01-01

Explicit training in teaming skills (both preservice and inservice) has been identified as a key means of facilitating the effective functioning of teaching teams (Main, 2007). This case study explored how groupwork tasks within university coursework can prepare preservice education students to work effectively in teaching teams. Three students in…

Case Study Research Methodology

Directory of Open Access Journals (Sweden)

Mark Widdowson

2011-01-01

Full Text Available Commenting on the lack of case studies published in modern psychotherapy publications, the author reviews the strengths of case study methodology and responds to common criticisms, before providing a summary of types of case studies including clinical, experimental and naturalistic. Suggestions are included for developing systematic case studies and brief descriptions are given of a range of research resources relating to outcome and process measures. Examples of a pragmatic case study design and a hermeneutic single-case efficacy design are given and the paper concludes with some ethical considerations and an exhortation to the TA community to engage more widely in case study research.

Project management case studies

CERN Document Server

Kerzner, Harold R

2013-01-01

A new edition of the most popular book of project management case studies, expanded to include more than 100 cases plus a ""super case"" on the Iridium Project Case studies are an important part of project management education and training. This Fourth Edition of Harold Kerzner''s Project Management Case Studies features a number of new cases covering value measurement in project management. Also included is the well-received ""super case,"" which covers all aspects of project management and may be used as a capstone for a course. This new edition:Contains 100-plus case studies drawn from re

Relative costs of anesthesiologist prepared, hospital pharmacy prepared and outsourced anesthesia drugs.

Science.gov (United States)

Jelacic, Srdjan; Craddick, Karen; Nair, Bala G; Bounthavong, Mark; Yeung, Kai; Kusulos, Dolly; Knutson, Jennifer A; Somani, Shabir; Bowdle, Andrew

2017-02-01

Anesthesia drugs can be prepared by anesthesia providers, hospital pharmacies or outsourcing facilities. The decision whether to outsource all or some anesthesia drugs is challenging since the costs associated with different anesthesia drug preparation methods remain poorly described. The costs associated with preparation of 8 commonly used anesthesia drugs were analyzed using a budget impact analysis for 4 different syringe preparation strategies: (1) all drugs prepared by anesthesiologist, (2) drugs prepared by anesthesiologist and hospital pharmacy, (3) drugs prepared by anesthesiologist and outsourcing facility, and (4) all drugs prepared by outsourcing facility. A strategy combining anesthesiologist and hospital pharmacy prepared drugs was associated with the lowest estimated annual cost in the base-case budget impact analysis with an annual cost of $225 592, which was lower than other strategies by a margin of greater than $86 000. A combination of anesthesiologist and hospital pharmacy prepared drugs resulted in the lowest annual cost in the budget impact analysis. However, the cost of drugs prepared by an outsourcing facility maybe lower if the capital investment needed for the establishment and maintenance of the US Pharmacopeial Convention Chapter compliant facility is included in the budget impact analysis. Copyright © 2016 Elsevier Inc. All rights reserved.

BOWEL PREPARATION BEFORE COLONOSCOPY FOR CHILDREN: comparison of efficacy of three different methods

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Seyed Mohsen DEHGHANI

2015-12-01

Full Text Available Background - Colonoscopy is an important diagnostic and therapeutic procedure. Adequate bowel preparation is mandatory. Several regimens were discussed in the literature. Among the drugs which has recently used, polyethylene glycol is one of the most popular agents. Objectives - The aim of this study was to compare efficacy of three different methods for 1 day preparation before colonoscopy. Methods - This study included children with the range of ages (2-21 who had an indication of colonoscopy. Exclusion criteria were based on the history of previous surgery, parental disagreement, and patients who did not use preparation protocol. Three methods for bowel preparation were studied: 1- Polyethylene glycol only; 2- Polyethylene glycol and bisacodyl suppositories; 3- Polyethylene glycol plus normal saline enema. Boston Bowel Preparation Score was used for evaluation of preparation. SPSS version 16.0 (Chicago, IL, USA were used for data analysis. Results - In this study 83 cases completed the bowel preparation completely. Acceptable bowel preparation was seen in 24 (85.71%, 36 (94.73%, and 14 (82.35% of cases in PEG, PEG + bisacodyl, and PEG + normal saline enema groups respectively. PEG + bisacodyl suppositories was more effective than PEG + normal saline for the preparation of the first segment ( P=0.05. For second and third segment of colon, BPPS score was higher in PEG + bisacodyl suppositories compared to other regimens, but this difference was not statistically significant. Conclusion - There was no significant difference between 1 day colonoscopy regimens in terms of bowel preparation score. Lowest score was seen in PEG + enema group compared to other group.

BOWEL PREPARATION BEFORE COLONOSCOPY FOR CHILDREN: comparison of efficacy of three different methods.

Science.gov (United States)

Dehghani, Seyed Mohsen; Javaherizadeh, Hazhir; Haghighat, Mahmood; Imanieh, Mohammad-Hadi; Ghanbari, Saeed

2015-12-01

Colonoscopy is an important diagnostic and therapeutic procedure. Adequate bowel preparation is mandatory. Several regimens were discussed in the literature. Among the drugs which has recently used, polyethylene glycol is one of the most popular agents. The aim of this study was to compare efficacy of three different methods for 1 day preparation before colonoscopy. This study included children with the range of ages (2-21) who had an indication of colonoscopy. Exclusion criteria were based on the history of previous surgery, parental disagreement, and patients who did not use preparation protocol. Three methods for bowel preparation were studied: 1- Polyethylene glycol only; 2- Polyethylene glycol and bisacodyl suppositories; 3- Polyethylene glycol plus normal saline enema. Boston Bowel Preparation Score was used for evaluation of preparation. SPSS version 16.0 (Chicago, IL, USA) were used for data analysis. In this study 83 cases completed the bowel preparation completely. Acceptable bowel preparation was seen in 24 (85.71%), 36 (94.73%), and 14 (82.35%) of cases in PEG, PEG + bisacodyl, and PEG + normal saline enema groups respectively. PEG + bisacodyl suppositories was more effective than PEG + normal saline for the preparation of the first segment ( P=0.05). For second and third segment of colon, BPPS score was higher in PEG + bisacodyl suppositories compared to other regimens, but this difference was not statistically significant. There was no significant difference between 1 day colonoscopy regimens in terms of bowel preparation score. Lowest score was seen in PEG + enema group compared to other group.

[Case and studies].

Science.gov (United States)

Schubert, András

2015-11-15

Case studies and case reports form an important and ever growing part of scientific and scholarly literature. The paper deals with the share and citation rate of these publication types on different fields of research. In general, evidence seems to support the opinion that an excessive number of such publications may negatively influence the impact factor of the journal. In the literature of scientometrics, case studies (at least the presence of the term "case study" in the titles of the papers) have a moderate share, but their citation rate is practically equal to that of other publication types.

Public health foodborne illness case study during a Special Operations Forces deployment to South America.

Science.gov (United States)

McCown, Michael; Grzeszak, Benjamin

2010-01-01

Although many public health articles have been published detailing foodborne illness outbreaks, a medical literature search revealed no articles that detail a case study or a specific response of a deployed U.S. military unit to a potential foodborne illness. This article describes a recent public health case study of a U.S. Special Operations Forces (SOF) team sickened while deployed to South America. It highlights public health factors which may affect U.S. personnel deployed or serving overseas and may serve as a guide for a deployed SOF medic to reference in response to a potential food- or waterborne illness outbreak. Eight food samples and five water samples were collected. The food samples were obtained from the host nation kitchen that provided food to the SOF team. The water samples were collected from the kitchen as well as from multiple sites on the host nation base. These samples were packaged in sterile containers, stored at appropriate temperatures, and submitted to a U.S. Army diagnostic laboratory for analysis. Laboratory results confirmed the presence of elevated aerobic plate counts (APCs) in the food prepared by the host nation and consumed by the SOF team. High APCs in food are the primary indicator of improper sanitation of food preparation surfaces and utensils. This case study concluded that poor kitchen sanitation, improper food storage, preparation, and/or holding were the probable conditions that led to the team?s symptoms. These results emphasize the importance of ensuring safe food and water for U.S. personnel serving overseas, especially in a deployment or combat setting. Contaminated food and/or water will negatively impact the health and availability of forces, which may lead to mission failure. The SOF medic must respond to potential outbreaks and be able to (1) critically inspect food preparation areas and accurately advise commanders in order to correct deficiencies and (2) perform food/water surveillance testing consistently

Study on multipartite quantum states: preparation, simulation, and characterization

International Nuclear Information System (INIS)

Kruszynska, C.

2009-01-01

In this thesis different problems are investigated related to the description as well as the manipulation of multipartite quantum states. Because of the superposition principle, the state of a composite quantum system can be entangled, i.e. exhibit quantum correlations between the sites. The entanglement of two-qubit systems is well understood. There is only one kind of entanglement which can be directly related to the value of the Schmidt coefficients. However this is not the case for multipartite entanglement of qubit systems. Unlike in the two-qubit case, a multipartite quantum state can be entangled in many different ways, which complicates the classification and characterization of such states. The storage and manipulation of a quantum state is a challenging task because of the decoherence resulting from the interaction of the state with its environment. One way to overcome this difficulty is to use entanglement purification which will be the subject of the first part of this thesis. Entanglement purification allows to extract a small number of nearly pure states out of a bigger set of mixed states. We review existing bipartite and multipartite entanglement purification protocols and introduce new protocols which are capable of purifying any graph state, enlarging by this the class of states which can be purified. The second part deals with the preparation and distribution of high-fidelity multi-party entangled states via noisy channels and operations. In the particular case of GHZ and cluster states, we study different strategies using bipartite or multipartite purification protocols. The most efficient strategy depends on the target fidelity one wishes to achieve and on the quality of transmission channel and local operations. We show the existence of a crossing point beyond which the strategy making use of the purification of the state as a whole is more efficient than a strategy in which pairs are purified before they are connected to the final state. We

The case study of biomaterials and biominerals

Science.gov (United States)

Del Hoyo Martínez, Carmen

2013-04-01

The teaching of biomaterials as case study by on-line platform , susceptible to develop both individually and in groups, got different objectives proposed by the European Higher Education System, among which include: participate actively in the teaching-learning process by students, interpreting situations, adapt processes and solutions. It also improves oral and written communication, analytical skills and synthesis and also the ability to think critically. Biomaterials have their origin in biominerals. These are solid inorganic compounds of defined structure, consisting of molecular control mechanisms that operate in biological systems. Its main functions are: structural support, a reservoir of essential elements, sensors, mechanical protection and storage of toxic elements. Following the demand of materials compatible with certain functional systems of our body, developed biomaterials. Always meet the condition of biocompatibility. Should be tolerated by the body and do not provoke rejection. This involves a comprehensive study of physiological conditions and the anatomy of the body where a biomaterial has to be implemented. The possibility of generating new materials from biominerals has a major impact in medicine and other fields could reach as geology, construction, crystallography, etc. While the study of these issues is in its infancy today, can be viewed as an impact on the art and future technology. Planning case study that students would prepare its report for discussion in subgroups. Occurs then the pooling of individual analysis, joint case discussion and adoption by the subgroup of a consensual solution to the problem. The teacher as facilitator and coordinator of the final case analysis, sharing leads to group-wide class and said the unanimous decision reached by the students and gives his opinion on the resolution of the case. REFERENCES D.P. Ausubel. Psicología Educativa. Un punto de vista cognoscitivo. Trillas. Ed. 1983. E.W. Eisner. Procesos

Building theories from case study research: the progressive case study

NARCIS (Netherlands)

Steenhuis, H.J.; de Bruijn, E.J.

2006-01-01

Meredith (1998) argues for more case and field research studies in the field of operations management. Based on a literature review, we discuss several existing approaches to case studies and their characteristics. These approaches include; the Grounded Theory approach which proposes no prior

Sample preparation

International Nuclear Information System (INIS)

Anon.

1992-01-01

Sample preparation prior to HPLC analysis is certainly one of the most important steps to consider in trace or ultratrace analysis. For many years scientists have tried to simplify the sample preparation process. It is rarely possible to inject a neat liquid sample or a sample where preparation may not be any more complex than dissolution of the sample in a given solvent. The last process alone can remove insoluble materials, which is especially helpful with the samples in complex matrices if other interactions do not affect extraction. Here, it is very likely a large number of components will not dissolve and are, therefore, eliminated by a simple filtration process. In most cases, the process of sample preparation is not as simple as dissolution of the component interest. At times, enrichment is necessary, that is, the component of interest is present in very large volume or mass of material. It needs to be concentrated in some manner so a small volume of the concentrated or enriched sample can be injected into HPLC. 88 refs

Clinical case of Successful Treatment by Antiviral Preparations of a Patient with Guillain — Barre Syndrome

Directory of Open Access Journals (Sweden)

E.Yu. Vinnyk

2015-11-01

Full Text Available There is described a clinical case of treatment of patients with acute Guillain — Barre syndrome of significant viral etiology. It was used the complex therapy with antiviral drugs according to the recommendations of the infectious disease specialist. In addition to basic therapy and plasma depletion, there were prescribed the preparation of acyclic nucleosides group, interferon and normal human immunoglobulin. The age of the latter significantly reduced the period of recovery of the patient and allow avoid complications.

In the Belly of the Beast: A Case Study of Social Work in a Managed Care Organization

Directory of Open Access Journals (Sweden)

Lisa S. Patchner

2002-05-01

Full Text Available The employment of social workers within managed care organizations is a new phenomenon. As such, this case study utilized an exploratory-descriptive design that assessed social workers as case managers within a Medicaid HMO. The semi-structured interviews, focus groups, and participant observation suggested that the use of case management services, delivered primarily by social workers,was effective in addressing the bio-psychosocial needs of Medicaid consumers within a provider-driven HMO. Study findings recommend specific knowledge and skills that social workers need in order to prepare for practice within managed care environments.

Seeking Clarity in New Jersey for Leadership Preparation Program Design: Confusion, Fragility, and Unintended Consequences

Science.gov (United States)

Doolittle, Gini

2013-01-01

In 2004, the New Jersey Department of Education issued a mandate to the 17 leadership preparation program providers to revise their leadership preparation programs after completing a critical friends review. This case study explores the challenges, programmatic, and political experiences of one preparation program as state support dwindled.…

Preparation and chemical crystallographic study of new hydrides and hydro-fluorides of ionic character; Preparation et etude cristallochimique de nouveaux hydrures et fluorohydrures a caractere ionique

Energy Technology Data Exchange (ETDEWEB)

Park, Hyung-Ho

1988-07-22

Within the context of a growing interest in the study of reversible hydrides with the perspective of their application in hydrogen storage, this research thesis more particularly addressed the case of ternary hydrides and fluorides, and of hydro-fluorides. The author reports the development of a method of preparation of alkaline hydrides, of alkaline earth hydrides and of europium hydride, and then the elaboration of ternary hydrides. He addresses the preparation of caesium fluorides and of calcium or nickel fluorides, of Europium fluorides, and of ternary fluorides. Then, he addresses the preparation of hydro-fluorides (caesium, calcium, europium fluorides, and caesium and nickel fluorides). The author presents the various experimental techniques: chemical analysis, radio-crystallographic analysis, volumetric mass density measurement, magnetic measurements, ionic conductivity measurements, Moessbauer spectroscopy, and nuclear magnetic resonance. He reports the crystallographic study of some ternary alkaline and alkaline-earth hydrides (KH-MgH{sub 2}, RbH-CaH{sub 2}, CsH-CaH{sub 2}, RbH-MgH{sub 2} and CsH-MgH{sub 2}) and of some hydro-fluorides (CsCaF{sub 2}H, EuF{sub 2}H, CsNiF{sub 2}H) [French] Dans une premiere partie, de nouveaux hydrures ternaires ont ete prepares et caracterises. Les systemes etudies sont AH-MH 2 (A = K, Rb, Cs et M = Mg, Ca). Dans les systemes AH-MgH 2 l'evolution structurale a ete discutee en fonction du caractere iono-covalent de la liaison magnesium-hydrogene. Dans une deuxieme partie, plusieurs nouveaux fluorohydrures ont ete mis en evidence. L'effet de la substitution de l'hydrogene au fluor dans ces phases a ete etudiee en utilisant la RMN, la spectroscopie Moessbauer, la conductivite ionique et les mesures magnetiques.

A two-station queue with dependent preparation and service times

NARCIS (Netherlands)

Vlasiou, M.; Adan, I.J.B.F.; Boxma, O.J.

2009-01-01

We discuss a single-server multi-station alternating queue where the preparation times and the service times are auto- and cross-correlated. We examine two cases. In the first case, preparation and service times depend on a common discrete time Markov chain. In the second case, we assume that the

PREPARATIVE SKIN PREPARATION AND SURGICAL WOUND INFECTION

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Anjanappa

2015-01-01

Full Text Available BACKGROUND AND OBJECTIVE: It is an established fact now that the normal skin of healthy human beings harbours a rich bacterial fl ora. Normally considered non - pathogenic , these organisms way be a potential source of infection of the surgical wound. Approximately 20% of the resident flora is beyond the reach of surgical scrubs and antiseptics. The goal of surgical preparation of the skin with antiseptics is to remove transient and pathogenic microorganisms on the skin surface and to reduce the resident flora to a low level. Povidone iodine (I odophors and chlorhexidine are most often used antiseptics for pre - operative skin preparation. OBJECTIVES : To evaluate the efficacy of povidone iodine alone and in combination with antiseptic agent containing alcoholic chlorhexidine in preoperative skin p reparation by taking swab culture. (2 To compare the rate of postoperative wound infection in both the groups. METHODS: One hundred patients (fifty in each group undergoing clean elective surgery with no focus of infection on the body were included in th e study. The pre - operative skin preparation in each group is done with the respective antiseptic regimen. In both the groups after application of antiseptics , sterile saline swab culture was taken immediately from site of incision. In cases which showed gr owth of organisms , the bacteria isolated were identified by their morphological and cultural characteristics. Grams staining , coagulase test and antibiotic sensitivity test were done wherever necessary and difference in colonization rates was determined as a measure of efficacy of antiseptic regimen. RESULTS: The results of the study showed that when compared to povidone iodine alone , using a combination of povidone iodine and alcoholic solution of chlorhexidine , the colonization rates of the site of incisi on were reduced significantly. As for the rate of post - operative wound infection , it is also proven that wound infections are also

Preliminary case studies of economy and energy profiles for Ireland during 1979-1990. Final report

Energy Technology Data Exchange (ETDEWEB)

Henry, E W

1981-01-01

How Irish 1985 Energy Demand Model (EDM) case study results have been optimized on the supply side, by means of the EFOM model and software, are described. The 1985 case study results are for low, likely, and high cases. The Low case represents a 1985 Irish economic profile for real GNP being 54% greater thand the GNP of 1974. The Likely case relates to 1985 real GNP being 70% greater than that of 1974, and the High to real GNP being 92% greater. The 1985 final energy results emerging from the case studies are tabulated, showing quantities of final energy required by each of the 13 sectors of the Irish EDM. In all three case studies, 5 of the 13 demand sectors take in aggregate more than 76% of the total energy; these five sectors, in decreasing size of demand, are: other household uses; other industries; private transport; cement; other services. The preparation for EFOM is described. The optimal final energy flows, with some comparisons with the non-optimal inital flows, are considered. The gross primary energy quantity and cost underlying the optimal final energy flows are examined in detail.

Admiral Furman Academy: A Case Study in Selected Not-for-Profit Auditing Issues

Science.gov (United States)

Grippo, Frank J.; Nassiripour, Sia

2009-01-01

The purpose of this case is to help students explore accounting and auditing issues often confronted by auditors of not-for-profit organizations. Given final financial statements, the goal of the case is to require students to prepare the footnotes that would be considered an integral part of the financial statements. The case is intended for…

131I-m IBG preparation and clinical applications

International Nuclear Information System (INIS)

Yassine, T.; Bakeir, M. A.; Al-Shnan, S.; Al-Asad, M.

2001-12-01

The factors affecting the preparation of 131 I-mIBG were studied and the optimal labelling and preparation conditions were determined in a manner that the requirements of GRP and GMP are satisfied. The m-IBG was labeled by isotopic exchange method where in situ produced Cu (II) was used as a catalyst. The Cu (II) was in situ produced by the effect of thiosulfate on Cu(II) ions in the presence of acetic acid. The optimal conditions were determined as: (The ratio of acetic acid to the iodide-131 solution is 0.5-1.5, the reaction temperature is (160 Centigrade), the reaction period is 60 minutes, and the quantity of m-IBG must be more than 1mg). At these conditions, high labelling yield of 98% was obtained. Further purification lead to an increase in the RCP to more than 99%. All preparations produced sterile and Pyrogen free solutions. The biodistribution studies in rats showed random distribution, which were slightly higher than that were shown in literature. These differences were attributed to the absence of stable iodine saturation of the rats prior to the injection of 131 I-mIBG in this study. Clinical studies using our products showed high localization in the tumors in case of neuroblastoma patients and in adrenal gland in case of pheochromocytoma patients. (author)

Preparation of earthquake-triggered landslide inventory maps using remote sensing and GIS technologies: Principles and case studies

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Chong Xu

2015-11-01

Full Text Available Inventory maps of earthquake-triggered landslides can be constructed using several methods, which are often subject to obvious differences due to lack of commonly accepted criteria or principles. To solve this problem, the author describes the principles for preparing inventory maps of earthquake-triggered landslides, focusing on varied methods and their criteria. The principles include the following key points: all landslides should be mapped as long as they can be recognized from images; both the boundary and source area position of landslides should be mapped; spatial distribution pattern of earthquake-triggered landslides should be continuous; complex landslides should be divided into distinct groups; three types of errors such as precision of the location and boundary of landslides, false positive errors, and false negative errors of earthquake-triggered landslide inventories should be controlled and reduced; and inventories of co-seismic landslides should be constructed by the visual interpretation method rather than automatic extraction of satellite images or/and aerial photographs. In addition, selection of remote sensing images and creation of landslides attribute database are also discussed in this paper. Then the author applies these principles to produce inventory maps of four events: the 12 May 2008 Wenchuan, China Mw 7.9, 14 April 2010 Yushu, China Mw 6.9, 12 January 2010 Haiti Mw 7.0, and 2007 Aysén Fjord, Chile Mw 6.2. The results show obvious differences in comparison with previous studies by other researchers, which again attest to the necessity of establishment of unified principles for preparation of inventory maps of earthquake-triggered landslides.

Preparative yield and properties of humic acids obtained by sequential alkaline extractions

Science.gov (United States)

Kholodov, V. A.; Yaroslavtseva, N. V.; Konstantinov, A. I.; Perminova, I. V.

2015-10-01

The preparative yield, composition, and structure of humic acids obtained by sequential alkaline extractions from two soils (a soddy-podzolic soil under forest and a typical chernozem in treatment with permanent black fallow of a long-term experiment since 1964) have been studied. The preparative yield of humic acids from the first extraction is 0.40 and 0.94% for the soddy-podzolic soil (Retisols) and the chernozem, respectively. The preparative yield from the second extraction is lower by several times, and the yield from the third extraction is lower by an order of magnitude. The study of the obtained preparations by elemental analysis, gel-permeation chromatography, and 13C NMR spectroscopy has shown insignificant changes in the elemental, molecular-weight, and structural-group composition of humic acids among the extractions. It has been supposed that this is related to the soil features: typical climatic factors for the formation of soil subtype in the case of soddy-podzolic soil and the land use in the long-term experiment in the case of typical chernozem. It has been concluded that that a single extraction is sufficient for the separation of humic acids and the preparation of a representative sample.

Interview with the Medicine Man: A Case Study of a Traditional Malian Healer

Directory of Open Access Journals (Sweden)

John Rovers

2014-01-01

Full Text Available Pharmacists are commonly members of medical mission teams that provide health care services in underdeveloped countries. Although pharmacists and others often find their service on a mission trip to be positive and life changing, critics of such missions note that Western providers trained in biomedicine frequently lack the cultural awareness to practice effectively in such settings. This paper is a case study of one traditional healer who practices in rural Mali. Although the results of one case from one practice setting may not be generalizable to all cultures, a basic understanding of the healer's beliefs and practices concerning the etiology and treatment of disease, the role of magic and other supernatural therapies, his experience with Western trained providers and the regulatory environment in which he works should assist pharmacists who serve on mission trips to be better culturally prepared.   Type: Case Study

[Bioequivalence studies of pharmaceutical preparations].

Science.gov (United States)

Vetchý, D; Frýbortová, K; Rabisková, M; Danecková, H

2007-01-01

Bioequivalence studies are very important for the development of a pharmaceutical preparation in the pharmaceutical industry. Their rationale is the monitoring of pharmacokinetic and pharmacodynamic parameters after the administration of tested drugs. The target of such study is to evaluate the therapeutic compatibility of tested drugs (pharmaceutical equivalents or pharmaceutical alternatives). The importance of bioequivalence studies is increasing also due to the large growth of the production and consumption of generic products. Generic products represent approximately 50 % of the whole consumption in many European countries and USA. The search output of bioequivalence study is together with the pharmaceutical quality data of medical product one of the main part of the registration file submitted to a national regulatory authorities. The registration of generic products does not demand complicated and expensive clinical study contrary to original product. The comparison of the original and the generic product via bioequivalence study is suggested as sufficient. The aim of this article is to provide to a medical public a summary about the types of bioequivalence studies, their range, rules of their practise and let them gain their own attitude to this question.

The information needs of occupational therapy students: a case study.

Science.gov (United States)

Morgan-Daniel, Jane; Preston, Hugh

2017-06-01

This article summarises a case study on the information needs of Masters level Occupational Therapy 5 (OT) students at one English university. A mixed methods questionnaire was used to explore motivators for information-seeking, preferred information resources and barriers inhibiting the satisfaction of information needs. Thirteen recommendations for practice were formulated, focusing on how information professionals can best facilitate OT students' learning and evidence-based research skills in preparation for clinical practice. The study was completed by Jane Morgan-Daniel, who received a Distinction for her work from Aberystwyth University, where she graduated with an MSC in Information and Library Studies in December 2016. She has written this article together with her dissertation supervisor, Hugh Preston. A. M. © 2017 Health Libraries Group.

Operating Room Fires and Surgical Skin Preparation.

Science.gov (United States)

Jones, Edward L; Overbey, Douglas M; Chapman, Brandon C; Jones, Teresa S; Hilton, Sarah A; Moore, John T; Robinson, Thomas N

2017-07-01

Operating room fires are "never events" that remain an under-reported source of devastating complications. One common set-up that promotes fires is the use of surgical skin preparations combined with electrosurgery and oxygen. Limited data exist examining the incidence of fires and surgical skin preparations. A standardized, ex vivo model was created with a 15 × 15 cm section of clipped porcine skin. An electrosurgical "Bovie" pencil was activated for 2 seconds on 30 Watts coagulation mode in 21% oxygen (room air), both immediately and 3 minutes after skin preparation application. Skin preparations with and without alcohol were tested, and were applied with and without pooling. Alcohol-based skin preparations included 70% isopropyl alcohol (IPA) with 2% chlorhexidine gluconate, 74% IPA with 0.7% iodine povacrylex, and plain 70% IPA. No fires occurred with nonalcohol-based preparations (p fires occurred in 38% (23 of 60) at 0 minutes and 27% (16 of 60) at 3 minutes. Alcohol-based skin preparations fuel operating room fires in common clinical scenarios. Following manufacturer guidelines and allowing 3 minutes for drying, surgical fires were still created in 1 in 10 cases without pooling and more than one-quarter of cases with pooling. Surgeons can decrease the risk of an operating room fire by using nonalcohol-based skin preparations or avoiding pooling of the preparation solution. Published by Elsevier Inc.

Exercise in Thoroughbred yearlings during sales preparation: a cohort study.

Science.gov (United States)

Bolwell, C F; Rogers, C W; French, N P; Firth, E C

2012-01-01

There is increasing evidence suggesting that early exercise in Thoroughbred racehorses may be beneficial to the development of the musculoskeletal system. At present, information on the exercise programmes and health problems of individual yearlings during a sales preparation is scant. To describe the exercise and health problems of Thoroughbred yearlings during preparation for sales, and to identify variations in exercise between and within farms. A prospective cohort study was used to collect exercise and health information from 18 farms across New Zealand. Daily exercise records for individual horses were recorded during the studfarms' preparation for the annual national yearling sales in January 2009. Data were collected from 319 yearlings, of which 283 (88.7%) were exercised (hand walking, mechanical walker and lungeing) during their preparations. Sales preparation lasted a median of 69 days (interquartile range 61-78) and differed significantly between farms (Psale (P = 0.14) or category of sales price (P = 0.12). Within certain farms, daily exercise differed between horses as did total exercise by gender and the number of days spent in the sales preparation. Lameness was the most common condition affecting yearlings and the overall incidence rate of lameness was 0.08 per 100 horse days (95% confidence interval 0.05-0.13). Incidence rates of lameness varied significantly between farms (P = 0.02), but not by age (P = 0.77), sales type (P = 0.58) or month of the preparation (P = 0.53). Yearling exercise programmes varied between and within farms. Since exercise is already being tailored for each individual horse, there may be an opportunity to allow for modifications to sales preparation with the future career in mind. © 2011 EVJ Ltd.

Are ‘Voluntary’ Self-Employed Better Prepared for Retirement than ‘Forced’ Self-Employed? : The Case of the Netherlands and Germany

NARCIS (Netherlands)

Hershey, D.A.; van Dalen, Harry; Henkens, Kene; Conen, W.S.

2016-01-01

When it comes to financial preparation for retirement, self-employed workers in many European countries face unique challenges not encountered by traditional wage earners. This is particularly true for self-employed workers who do not supervise subordinate personnel. This is the case because many

Are ‘Voluntary’ Self-Employed Better Prepared for Retirement than ‘Forced’ Self-Employed? The Case of the Netherlands and Germany

NARCIS (Netherlands)

Hershey, D.; van Dalen, H.P.; Conen, W.S.; Henkens, K.

2016-01-01

When it comes to financial preparation for retirement, self-employed workers in many European countries face unique challenges not encountered by traditional wage earners. This is particularly true for self-employed workers who do not supervise subordinate personnel. This is the case because many

Modeling and preparation of activated carbon for methane storage II. Neural network modeling and experimental studies of the activated carbon preparation

International Nuclear Information System (INIS)

Namvar-Asl, Mahnaz; Soltanieh, Mohammad; Rashidi, Alimorad

2008-01-01

This study describes the activated carbon (AC) preparation for methane storage. Due to the need for the introduction of a model, correlating the effective preparation parameters with the characteristic parameters of the activated carbon, a model was developed by neural networks. In a previous study [Namvar-Asl M, Soltanieh M, Rashidi A, Irandoukht A. Modeling and preparation of activated carbon for methane storage: (I) modeling of activated carbon characteristics with neural networks and response surface method. Proceedings of CESEP07, Krakow, Poland; 2007.], the model was designed with the MATLAB toolboxes providing the best response for the correlation of the characteristics parameters and the methane uptake of the activated carbon. Regarding this model, the characteristics of the activated carbon were determined for a target methane uptake. After the determination of the characteristics, the demonstrated model of this work guided us to the selection of the effective AC preparation parameters. According to the modeling results, some samples were prepared and their methane storage capacity was measured. The results were compared with those of a target methane uptake (special amount of methane storage). Among the designed models, one of them illustrated the methane storage capacity of 180 v/v. It was finally found that the neural network modeling for the assay of the efficient AC preparation parameters was financially feasible, with respect to the determined methane storage capacity. This study could be useful for the development of the Adsorbed Natural Gas (ANG) technology

Beer as colon lavage preparation

International Nuclear Information System (INIS)

Kinnunen, J.; Linden, H.; Pietilae, J.; Juutilainen, T.

1987-01-01

Six patients received beer preparation prior to double contrast barium enema. The beer group scored slightly better (though not statistically significantly) both in the cleanliness and in the mucosal coating of the bowel than the control group with standard preparation. The fluid balance was unaltered. The patients in the beer group felt surprisingly well, likely due to the good fluid and energy balance provided by the beer. The beer preparation could be used in cases, when the patients are ready to intake beer and want to maintain a good nutritional status. (orig.) [de

Identification of components of fibroadenoma in cytology preparations using texture analysis: a morphometric study.

Science.gov (United States)

Singh, S; Gupta, R

2012-06-01

To evaluate the utility of image analysis using textural parameters obtained from a co-occurrence matrix in differentiating the three components of fibroadenoma of the breast, in fine needle aspirate smears. Sixty cases of histologically proven fibroadenoma were included in this study. Of these, 40 cases were used as a training set and 20 cases were taken as a test set for the discriminant analysis. Digital images were acquired from cytological preparations of all the cases and three components of fibroadenoma (namely, monolayered cell clusters, stromal fragments and background with bare nuclei) were selected for image analysis. A co-occurrence matrix was generated and a texture parameter vector (sum mean, energy, entropy, contrast, cluster tendency and homogeneity) was calculated for each pixel. The percentage of pixels correctly classified to a component of fibroadenoma on discriminant analysis was noted. The textural parameters, when considered in isolation, showed considerable overlap in their values of the three cytological components of fibroadenoma. However, the stepwise discriminant analysis revealed that all six textural parameters contributed significantly to the discriminant functions. Discriminant analysis using all the six parameters showed that the numbers of pixels correctly classified in training and tests sets were 96.7% and 93.0%, respectively. Textural analysis using a co-occurrence matrix appears to be useful in differentiating the three cytological components of fibroadenoma. These results could further be utilized in developing algorithms for image segmentation and automated diagnosis, but need to be confirmed in further studies. © 2011 Blackwell Publishing Ltd.

Preparation, properties, and some recent studies of the actinide metals

International Nuclear Information System (INIS)

Haire, R.G.

1985-01-01

The actinide elements form a unique series of metals. The variation in their physial properties combined with the varying availability of the different elements offers a challenge to the preparative scientist. This article provides a brief review of selected methods used for preparing μg to kg amounts of the actinide metals and the properties of these metals. In addition, some recent studies on selected actinide metals are discussed. 62 refs

The Effect of Secondary School Study Skills Preparation on First-Year University Achievement

Science.gov (United States)

Jansen, Ellen P. W. A.; Suhre, Cor J. M.

2010-01-01

Although many studies have revealed the importance of study skills for students' first-year performance and college retention, the extent of the impact of study skills preparation on students' academic achievement is less clear. This paper explores the impact of pre-university study skills preparation on students' first-year study experiences,…

Histological Stains: A Literature Review and Case Study.

Science.gov (United States)

Alturkistani, Hani A; Tashkandi, Faris M; Mohammedsaleh, Zuhair M

2015-06-25

The history of histology indicates that there have been significant changes in the techniques used for histological staining through chemical, molecular biology assays and immunological techniques, collectively referred to as histochemistry. Early histologists used the readily available chemicals to prepare tissues for microscopic studies; these laboratory chemicals were potassium dichromate, alcohol and the mercuric chloride to harden cellular tissues. Staining techniques used were carmine, silver nitrate, Giemsa, Trichrome Stains, Gram Stain and Hematoxylin among others. The purpose of this research was to assess past and current literature reviews, as well as case studies, with the aim of informing ways in which histological stains have been improved in the modern age. Results from the literature review has indicated that there has been an improvement in histopathology and histotechnology in stains used. There has been a rising need for efficient, accurate and less complex staining procedures. Many stain procedures are still in use today, and many others have been replaced with new immunostaining, molecular, non-culture and other advanced staining techniques. Some staining methods have been abandoned because the chemicals required have been medically proven to be toxic. The case studies indicated that in modern histology a combination of different stain techniques are used to enhance the effectiveness of the staining process. Currently, improved histological stains, have been modified and combined with other stains to improve their effectiveness.

Acute toxic hepatitis caused by an aloe vera preparation in a young patient: a case report with a literature review.

Science.gov (United States)

Lee, Jeonghun; Lee, Mi Sun; Nam, Kwan Woo

2014-07-01

Aloe is one of the leading products used in phytomedicine. Several cases of aloe-induced toxic hepatitis have been reported in recent years. However, its toxicology has not yet been systematically described in the literature. A 21-year-old female patient was admitted to our hospital with acute hepatitis after taking an aloe vera preparation for four weeks. Her history, clinical manifestation, laboratory findings, and histological findings all led to the diagnosis of aloe vera-induced toxic hepatitis. We report herein on a case of acute toxic hepatitis induced by aloe vera.

Influence of Ethics Education on Moral Reasoning among Pre-Service Teacher Preparation and Social Work Students

Science.gov (United States)

Salopek, Michelle M.

2013-01-01

This comparative case study examines the influence of ethics education on moral reasoning among pre-service teacher preparation and social work students. This study specifically investigates the ethical values of students enrolled in a teacher preparation and social work education program by their fourth year of study; the degree of ethical…

Studies on the Preparation of Magnetic Photocatalysts

International Nuclear Information System (INIS)

Watson, S.; Scott, J.; Beydoun, D.; Amal, R.

2005-01-01

A crystalline titanium dioxide coating was deposited onto silica insulated magnetite particles to prepare a stable magnetic photocatalyst. The direct deposition of crystalline titanium dioxide was conducted by aging dispersions of insulated magnetite particles in a titanium sol-gel precursor mixture at 60-90 deg. C. The coating process was found to be influenced by pH, alkoxide precursor concentration, aging time and reaction temperature. A mechanism for the formation of the titanium dioxide coating has been proposed. The photocatalytic performance of the prepared particles was found to be related to the preparation conditions

Errors in preparation and administration of parenteral drugs in neonatology: evaluation and corrective actions.

Science.gov (United States)

Hasni, Nesrine; Ben Hamida, Emira; Ben Jeddou, Khouloud; Ben Hamida, Sarra; Ayadi, Imene; Ouahchi, Zeineb; Marrakchi, Zahra

2016-12-01

The medication iatrogenic risk is quite unevaluated in neonatology Objective: Assessment of errors that occurred during the preparation and administration of injectable medicines in a neonatal unit in order to implement corrective actions to reduce the occurrence of these errors. A prospective, observational study was performed in a neonatal unit over a period of one month. The practice of preparing and administering injectable medications were identified through a standardized data collection form. These practices were compared with summaries of the characteristics of each product (RCP) and the bibliography. One hundred preparations were observed of 13 different drugs. 85 errors during preparations and administration steps were detected. These errors were divided into preparation errors in 59% of cases such as changing the dilution protocol (32%), the use of bad solvent (11%) and administration errors in 41% of cases as errors timing of administration (18%) or omission of administration (9%). This study showed a high rate of errors during stages of preparation and administration of injectable drugs. In order to optimize the care of newborns and reduce the risk of medication errors, corrective actions have been implemented through the establishment of a quality assurance system which consisted of the development of injectable drugs preparation procedures, the introduction of a labeling system and staff training.

METALLOGRAPHIC SAMPLE PREPARATION STATION-CONSTRUCTIVE CONCEPT

Directory of Open Access Journals (Sweden)

AVRAM Florin Timotei

2016-11-01

Full Text Available In this paper we propose to present the issues involved in the case of the constructive conception of a station for metallographic sample preparation. This station is destined for laboratory work. The metallographic station is composed of a robot ABB IRB1600, a metallographic microscope, a gripping device, a manipulator, a laboratory grinding and polishing machine. The robot will be used for manipulation of the sample preparation and the manipulator take the sample preparation for processing.

Final report on case studies

DEFF Research Database (Denmark)

Ljungberg, Daniel; McKelvey, Maureen; Lassen, Astrid Heidemann

2012-01-01

Case study as a research design means investigating a single or multiple instance(s) or setting(s) (i.e. a case) and its entire context to explain a phenomenon and its processes. This is achieved through detailed understanding, usually comprised of multiple sources of information. In this way, case...... studies attempt to provide as a complete an understanding of a (complex) phenomenon as possible. Within the AEGIS project, survey and case study research are complementary. They are complementary in the sense that the former can provide more generalizable evidence on a phenomenon in terms of cross......-sectional data, while the latter can provide more in-depth (qualitative) understanding on specific issues. In systematically examining the case studies, however, this report goes beyond a typical single case study. Here we provide a synthesis of 86 case studies. Multiple case studies, following similar focus...

Limited-preparation CT colonography in frail elderly patients: a feasibility study.

LENUS (Irish Health Repository)

Keeling, Aoife N

2010-05-01

Full colonic preparation can be onerous and may be poorly tolerated in frail elderly patients. The purpose of this study was to prospectively assess the image quality and diagnostic yield of limited-preparation CT colonography (CTC) in elderly patients with suspected colorectal cancer who were deemed medically unfit or unsuitable for colonoscopy.

Chemomechanical preparation by hand instrumentation and by Mtwo engine-driven rotary files, an ex vivo study.

Science.gov (United States)

Krajczár, Károly; Tigyi, Zoltán; Papp, Viktória; Marada, Gyula; Sára, Jeges; Tóth, Vilmos

2012-07-01

To compare the disinfecting efficacy of the sodium hypochlorite irrigation by root canal preparation with stainless steel hand files, taper 0.02 and nickel-titanium Mtwo files with taper 0.04-0.06. 40 extracted human teeth were sterilized, and then inoculated with Enterococcus faecalis (ATCC 29212). After 6 day incubation time the root canals were prepared by hand with K-files (n=20) and by engine-driven Mtwo files (VDW, Munich, Germany) (n=20). Irrigation was carried out with 2.5% NaOCl in both cases. Samples were taken and determined in colony forming units (CFU) from the root canals before and after the preparation with instruments #25 and #35. Significant reduction in bacterial count was determined after filing at both groups. The number of bacteria kept on decreasing with the extension of apical preparation diameter. There was no significant difference between the preparation sizes in the bacterial counts after hand or engine-driven instrumentation at the same apical size. Statistical analysis was carried out with Mann-Whitney test, paired t-test and independent sample t-test. Significant reduction in CFU was achieved after the root canal preparation completed with 2.5% NaOCl irrigation, both with stainless steel hand or nickel-titanium rotary files. The root canal remained slightly infected after chemo mechanical preparation in both groups. Key words:Chemomechanical preparation, root canal disinfection, nickel-titanium, conicity, greater taper, apical size.

The evaluation of forensic cases reported due to food poisoning

Directory of Open Access Journals (Sweden)

Beyza Urazel

2014-03-01

Full Text Available Objective: In this study it is aimed to examine forensic food poisoning cases and to evaluate the clinical presentation of food poisoning in people within the context of forensic medicine. Methods: In the study, 215 food poisoning cases are evaluated, which applied to the forensic medicine branch office in our city between 01.01.2007 and 31.12.2011. The forensic reports and forensic investigations of these cases are analyzed retrospectively. The cases are examined in terms of gender, age, the type of food consumed, the treatment applied and the result of the forensic report. Results: It is determined that in 83 cases (38.6% food poisoning was caused by chicken products, and in 178 cases (82.8% the poisoned people were students. In 3 cases (1.4% the poisoning was life threatening. For 75 cases (34.9% no forensic report was prepared in emergency service and among the 140 cases for which a forensic report was prepared, only 3 of the reports were prepared in a correct manner. Conclusions: It is determined that the demographic data of the cases complies with the city where the study was conducted. It is found out that in emergency services the food poisoning cases are usually misevaluated.

A comparison of results from two mycology laboratories for the diagnosis of onychomycosis: a study of 85 cases in a geriatric population.

Science.gov (United States)

Scherer, William P; Scherer, Michael D

2004-01-01

An investigative study was performed to compare the results from two mycology laboratories for the diagnosis of onychomycosis in a geriatric population and to determine the possible pharmacologic treatments based on the two laboratories' results. In this study, 85 cases of suspected onychomycosis involving men and women 65 years and older from a nursing home setting in South Florida were used. Samples were taken from the hallux toenail and sent to two different mycology laboratories for fluorescent potassium hydroxide preparation and microscopic examination of a fungal culture. Of the 85 cases studied, the two mycology laboratories reported similar potassium hydroxide preparation results for 58.8% of the patients and similar fungal culture results for genus and species identification for 37.6% of the patients. When the potassium hydroxide preparation and fungal culture results were combined, the two mycology laboratories reported similar results for only 27.1% of the patients. As a result of the two mycology laboratories' findings, the possible US Food and Drug Administration-approved pharmacologic treatments may differ for 43.5% of the patients studied. The discrepancy between the two independent laboratories leaves physicians to question the reproducibility of fluorescent potassium hydroxide preparation and fungal culture analysis in a geriatric patient population for the diagnosis of onychomycosis.

Are general surgery residents adequately prepared for hepatopancreatobiliary fellowships? A questionnaire-based study

Science.gov (United States)

Osman, Houssam; Parikh, Janak; Patel, Shirali; Jeyarajah, D Rohan

2015-01-01

Background The present study was conducted to assess the preparedness of hepatopancreatobiliary (HPB) fellows upon entering fellowship, identify challenges encountered by HPB fellows during the initial part of their HPB training, and identify potential solutions to these challenges that can be applied during residency training. Methods A questionnaire was distributed to all HPB fellows in accredited HPB fellowship programmes in two consecutive academic years (n = 42). Reponses were then analysed. Results A total of 19 (45%) fellows responded. Prior to their fellowship, 10 (53%) were in surgical residency and the rest were in other surgical fellowships or surgical practice. Thirteen (68%) were graduates of university-based residency programmes. All fellows felt comfortable in performing basic laparoscopic procedures independently at the completion of residency and less comfortable in performing advanced laparoscopy. Eight (42%) fellows cited a combination of inadequate case volume and lack of autonomy during residency as the reasons for this lack of comfort. Thirteen (68%) identified inadequate preoperative workup and management as their biggest fear upon entering practice after general surgery training. A total of 17 (89%) fellows felt they were adequately prepared to enter HPB fellowship. Extra rotations in transplant, vascular or minimally invasive surgery were believed to be most helpful in preparing general surgery residents pursing HPB fellowships. Conclusions Overall, HPB fellows felt themselves to be adequately prepared for fellowship. Advanced laparoscopic procedures and the perioperative management of complex patients are two of the challenges facing HPB fellows. General surgery residents who plan to pursue an HPB fellowship may benefit from spending extra rotations on certain subspecialties. Focus on perioperative workup and management should be an integral part of residency and fellowship training. PMID:25387852

[Case-non case studies: Principles, methods, bias and interpretation].

Science.gov (United States)

Faillie, Jean-Luc

2017-10-31

Case-non case studies belongs to the methods assessing drug safety by analyzing the disproportionality of notifications of adverse drug reactions in pharmacovigilance databases. Used for the first time in the 1980s, the last few decades have seen a significant increase in the use of this design. The principle of the case-non case study is to compare drug exposure in cases of a studied adverse reaction with that of cases of other reported adverse reactions and called "non cases". Results are presented in the form of a reporting odds ratio (ROR), the interpretation of which makes it possible to identify drug safety signals. This article describes the principle of the case-non case study, the method of calculating the ROR and its confidence interval, the different modalities of analysis and how to interpret its results with regard to the advantages and limitations of this design. Copyright © 2017 Société française de pharmacologie et de thérapeutique. Published by Elsevier Masson SAS. All rights reserved.

Blended learning in health education: three case studies.

Science.gov (United States)

de Jong, Nynke; Savin-Baden, Maggi; Cunningham, Anne Marie; Verstegen, Daniëlle M L

2014-09-01

Blended learning in which online education is combined with face-to-face education is especially useful for (future) health care professionals who need to keep up-to-date. Blended learning can make learning more efficient, for instance by removing barriers of time and distance. In the past distance-based learning activities have often been associated with traditional delivery-based methods, individual learning and limited contact. The central question in this paper is: can blended learning be active and collaborative? Three cases of blended, active and collaborative learning are presented. In case 1 a virtual classroom is used to realize online problem-based learning (PBL). In case 2 PBL cases are presented in Second Life, a 3D immersive virtual world. In case 3 discussion forums, blogs and wikis were used. In all cases face-to-face meetings were also organized. Evaluation results of the three cases clearly show that active, collaborative learning at a distance is possible. Blended learning enables the use of novel instructional methods and student-centred education. The three cases employ different educational methods, thus illustrating diverse possibilities and a variety of learning activities in blended learning. Interaction and communication rules, the role of the teacher, careful selection of collaboration tools and technical preparation should be considered when designing and implementing blended learning.

THE CASE APPROACH TO PREPARING FOR TEACHING.

Science.gov (United States)

AMIDON, EDMUND; HUNTER, ELIZABETH

TO HELP PROSPECTIVE TEACHERS DEVELOP TEACHING SKILLS, PAIRS OF CASES (RECORDS OF REAL TEACHING SITUATIONS) WHICH DEPICT SIGNIFICANTLY DIFFERENT APPROACHES TAKEN BY TEACHERS WITH A SIMILAR CLASSROOM PROBLEM ARE VERBALLY DESCRIBED. EACH PAIR OF CASES IS ANALYZED USING THE CATEGORIES OF THE VERBAL INTERACTION CATEGORY SYSTEM (VICS) WHICH MEASURES…

Case Reports, Case Series - From Clinical Practice to Evidence-Based Medicine in Graduate Medical Education.

Science.gov (United States)

Sayre, Jerry W; Toklu, Hale Z; Ye, Fan; Mazza, Joseph; Yale, Steven

2017-08-07

Case reports and case series or case study research are descriptive studies that are prepared for illustrating novel, unusual, or atypical features identified in patients in medical practice, and they potentially generate new research questions. They are empirical inquiries or investigations of a patient or a group of patients in a natural, real-world clinical setting. Case study research is a method that focuses on the contextual analysis of a number of events or conditions and their relationships. There is disagreement among physicians on the value of case studies in the medical literature, particularly for educators focused on teaching evidence-based medicine (EBM) for student learners in graduate medical education. Despite their limitations, case study research is a beneficial tool and learning experience in graduate medical education and among novice researchers. The preparation and presentation of case studies can help students and graduate medical education programs evaluate and apply the six American College of Graduate Medical Education (ACGME) competencies in the areas of medical knowledge, patient care, practice-based learning, professionalism, systems-based practice, and communication. A goal in graduate medical education should be to assist residents to expand their critical thinking, problem-solving, and decision-making skills. These attributes are required in the teaching and practice of EBM. In this aspect, case studies provide a platform for developing clinical skills and problem-based learning methods. Hence, graduate medical education programs should encourage, assist, and support residents in the publication of clinical case studies; and clinical teachers should encourage graduate students to publish case reports during their graduate medical education.

Working with a fixed operating room team on consecutive similar cases and the effect on case duration and turnover time.

Science.gov (United States)

Stepaniak, Pieter S; Vrijland, Wietske W; de Quelerij, Marcel; de Vries, Guus; Heij, Christiaan

2010-12-01

If variation in procedure times could be controlled or better predicted, the cost of surgeries could be reduced through improved scheduling of surgical resources. This study on the impact of similar consecutive cases on the turnover, surgical, and procedure times tests the perception that repeating the same manual tasks reduces the duration of these tasks. We hypothesize that when a fixed team works on similar consecutive cases the result will be shorter turnover and procedure duration as well as less variation as compared with the situation without a fixed team. Case-control study. St Franciscus Hospital, a large general teaching hospital in Rotterdam, the Netherlands. Two procedures, inguinal hernia repair and laparoscopic cholecystectomy, were selected and divided across a control group and a study group. Patients were randomly assigned to the study or control group. Preparation time, surgical time, procedure time, and turnover time. For inguinal hernia repair, we found a significantly lower preparation time and 10 minutes less procedure time in the study group, as compared with the control group. Variation in the study group was lower, as compared with the control group. For laparoscopic cholecystectomy, preparation time was significantly lower in the study group, as compared with the control group. For both procedures, there was a significant decrease in turnover time. Scheduling similar consecutive cases and performing with a fixed team results in lower turnover times and preparation times. The procedure time of the inguinal hernia repair decreased significantly and has practical scheduling implications. For more complex surgery, like laparoscopic cholecystectomy, there is no effect on procedure time.

Adults Studying Pure Mathematics in Adult Tertiary Preparation.

Science.gov (United States)

Bennison, Anne

2002-01-01

Investigated the experiences of a group of adults enrolled in the Pure Mathematics module of the Certificate IV in Adult Tertiary Preparation in 2000 at one of the Institutes of TAFE in Brisbane, Australia. Classroom learning experiences, exposure to technology, and the impact of returning to study on other facets of students' lives were…

Preparation and study of dialkyl nitroxide radicals

International Nuclear Information System (INIS)

Chenavas, P.

1969-01-01

These radicals are obtained by oxidation of N-hydroxy-imides with lead tetracetate or p-nitro-perbenzoic acid. These imides are prepared by heating dicarboxylic acids anhydrides with benzyloxy-amine followed by catalytic hydrogenation of N-benzyloxy-imides so obtained. Two series of radicals have mainly been studied, the first concerning five-membered cyclic imides, the second six-membered cyclic imides, these molecules having methyls substituents or no on the carbon ring. N. M. R. spectra of some O-benzyl-imides have been analysed. These different results have made it possible to study the conformation and stereochemistry of these imides. (author) [fr

Predictive Ability from ePortfolios of Student Achievement Associated with Professional Teaching Standards: An Exploratory Case Study

Science.gov (United States)

Payne, Phillip; Burrack, Frederick

2017-01-01

This exploratory case study, focused on a music teacher preparation program, examined the coursework ePortfolios of pre-service music teachers to determine if any parts of the ePortfolio process predicted teaching effectiveness in the classroom during the student teaching semester. Sixty-five undergraduate pre-service music teachers made up the…

Case-control studies in neurosurgery.

Science.gov (United States)

Nesvick, Cody L; Thompson, Clinton J; Boop, Frederick A; Klimo, Paul

2014-08-01

Observational studies, such as cohort and case-control studies, are valuable instruments in evidence-based medicine. Case-control studies, in particular, are becoming increasingly popular in the neurosurgical literature due to their low cost and relative ease of execution; however, no one has yet systematically assessed these types of studies for quality in methodology and reporting. The authors performed a literature search using PubMed/MEDLINE to identify all studies that explicitly identified themselves as "case-control" and were published in the JNS Publishing Group journals (Journal of Neurosurgery, Journal of Neurosurgery: Pediatrics, Journal of Neurosurgery: Spine, and Neurosurgical Focus) or Neurosurgery. Each paper was evaluated for 22 descriptive variables and then categorized as having either met or missed the basic definition of a case-control study. All studies that evaluated risk factors for a well-defined outcome were considered true case-control studies. The authors sought to identify key features or phrases that were or were not predictive of a true case-control study. Those papers that satisfied the definition were further evaluated using the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist. The search detected 67 papers that met the inclusion criteria, of which 32 (48%) represented true case-control studies. The frequency of true case-control studies has not changed with time. Use of odds ratios (ORs) and logistic regression (LR) analysis were strong positive predictors of true case-control studies (for odds ratios, OR 15.33 and 95% CI 4.52-51.97; for logistic regression analysis, OR 8.77 and 95% CI 2.69-28.56). Conversely, negative predictors included focus on a procedure/intervention (OR 0.35, 95% CI 0.13-0.998) and use of the word "outcome" in the Results section (OR 0.23, 95% CI 0.082-0.65). After exclusion of nested case-control studies, the negative correlation between focus on a procedure

Studies on preparation and characterization of indium doped zinc ...

Indian Academy of Sciences (India)

Unknown

The preparation of indium doped zinc oxide films is discussed. ... XRD studies have shown a change in preferential orientation from (002) to .... at grain boundaries in the form of In(OH)3, hindering the .... Angular substrate to nozzle distance.

Evaluation of spectral libraries and sample preparation for DIA-LC-MS analysis of host cell proteins: A case study of a bacterially expressed recombinant biopharmaceutical protein.

Science.gov (United States)

Heissel, Søren; Bunkenborg, Jakob; Kristiansen, Max Per; Holmbjerg, Anne Fich; Grimstrup, Marie; Mørtz, Ejvind; Kofoed, Thomas; Højrup, Peter

2018-07-01

Recombinantly expressed biopharmaceutical proteins often undergo a series of purification steps with the aim of removing contaminating material. Depending on the application of the protein, there are various requirements for the degree of purity, but host cell proteins (HCPs) will in general remain in small amounts. LC-MS has emerged as an orthogonal technique, capable of providing detailed information regarding the individual proteins. The aim of this case study was to characterize the HCPs associated with a biopharmaceutical protein, provided by Statens Serum Institut (DK), which is used in the field of tuberculosis and has not previously been studied by LC-MS. The developed method and acquired experiences served to develop a generalized strategy for HCP-characterization in our laboratory. We evaluated the use of different spectral libraries, recorded in data-dependent mode for obtaining the highest HCP coverage, combined with SWATH-based absolute quantification. The accuracy of two label-free absolute quantification strategies was evaluated using stable isotope peptides. Two different sample preparation workflows were evaluated for optimal HCP yield. . The label-free strategy produced accurate quantification across several orders of magnitude, and the calculated purity was found to be in agreement with previously obtained ELISA data. Copyright © 2018 Elsevier Inc. All rights reserved.

Identification and medical utilization of incident cases of alcohol dependence: A population-based case-control study.

Science.gov (United States)

Pan, Chun-Hung; Li, Min-Shan; Yang, Tien-Wey; Huang, Ming-Chyi; Su, Sheng-Shiang; Hung, Yen-Ni; Chen, Chiao-Chicy; Kuo, Chian-Jue

2018-05-05

Patients with alcohol dependence (AD) often seek help from medical professionals due to alcohol-related diseases, but the overall distribution of medical specialties identifying new AD cases is unclear. We investigated how such cases were identified and how medical resources were utilized before the identification of AD in a nationwide cohort. We enrolled a population-based cohort (N = 1,000,000) using the National Health Insurance Research Database of Taiwan; 8181 cases with incident AD were retrieved between January 1, 2000, and December 31, 2010. For this nested case-control study, four controls were matched for age and sex with each case based on risk-set sampling. We measured various dimensions of medical utilization before AD was diagnosed, including department visited, physical comorbidity, and medication used. Conditional logistic regression was used for estimating the variables associated with AD. Patients living in less urbanized areas who were unemployed were more likely to develop AD. The highest proportions (34.2%) of AD cases were identified in the internal medicine department, followed by the emergency (22.3%) and psychiatry (18.7%) departments. AD patients had a higher risk of comorbid chronic hepatic disease (adjusted RR = 2.72, p identification of AD than controls. AD patients also had greater numbers of hospital admissions than controls, including non-psychiatric and psychiatric hospitalizations. Outpatient visit numbers were similar for AD patients and controls. The findings indicate that clinicians providing care in diverse medical settings should be prepared to screen for unhealthy alcohol use and to mitigate its detrimental effects. Copyright © 2018 Elsevier B.V. All rights reserved.

Preparation of porous magnesium oxide foam and study on its enrichment of uranium

Science.gov (United States)

Wang, Yunsheng; Chen, Yuantao; Liu, Chen; Yu, Fang

2018-06-01

Herein, we prepared porous magnesium oxide (MP-MgO) by in situ carbonization and using Mg(NO3)2 as precursor along with P123 as soft template. The BET surface area, and total pore volume of MP-MgO were found to be 14.76 m2 g, 0.15 cm3 g-1, respectively. The adsorption behavior of U (Ⅵ) by the porous MgO was studied by static adsorption experiments, and also the effects of adsorption time, pH of wastewater and U (Ⅵ) concentration were discussed. The results indicated that the optimum pH for MP-MgO was 3.0-4.5, the removal of uranium in this case was mainly due to surface complexation. Through the study, we found that the adsorption capacity of MP-MgO for uranium was more than 2500 mg g-1, the adsorption equilibrium time was about 150 min. Moreover, the kinetic study showed that the process followed the pseudo-first-order model, and the adsorption process was spontaneous and endothermic.

Social disparities in food preparation behaviours: a DEDIPAC study

NARCIS (Netherlands)

Méjean, C.; Si Hassen, W.; Gojard, S.; Ducrot, P.; Lampuré, A.; Brug, H.; Lien, N.; Nicolaou, M.; Holdsworth, M.; Terragni, L.; Hercberg, S.; Castetbon, K.

2017-01-01

Background The specific role of major socio-economic indicators in influencing food preparation behaviours could reveal distinct socio-economic patterns, thus enabling mechanisms to be understood that contribute to social inequalities in health. This study investigated whether there was an

Social disparities in food preparation behaviours: a DEDIPAC study

NARCIS (Netherlands)

Méjean, Caroline; Si Hassen, Wendy; Gojard, Séverine; Ducrot, Pauline; Lampuré, Aurélie; Brug, Hans; Lien, Nanna; Nicolaou, Mary; Holdsworth, Michelle; Terragni, Laura; Hercberg, Serge; Castetbon, Katia

2017-01-01

Background: The specific role of major socio-economic indicators in influencing food preparation behaviours could reveal distinct socio-economic patterns, thus enabling mechanisms to be understood that contribute to social inequalities in health. This study investigated whether there was an

Merging Regular and Special Education Teacher Preparation Programs: The Integrated Special Education-English Project (ISEP).

Science.gov (United States)

Miller, Darcy E.

1991-01-01

Describes the Integrated Special Education-English Project (ISEP) which facilitated the gradual integration of special education and English teacher preparation programs. A description of the ISEP model and a case study are included. The case study indicated student teachers who participated in the ISEP improved special education and English…

Safety of Combination of a Tetravalent Meningococcal Conjugate Vaccine Against Serogroups A, C, Y, W-135 With Other Vaccine Preparations: a Prospective Study of a Series of Cases Among Healthy Children and Children With Various Health Abnormalities

Directory of Open Access Journals (Sweden)

Leyla S. Namazova-Baranova

2017-01-01

Full Text Available Meningococcal infection is an acute disease caused by Neisseria meningitidis, which proceeds with a diverse clinical aspect from nasopharyngitis to meningococcal meningitis and meningococcemia. Since 2014, a tetravalent meningococcal conjugate vaccine has been registered in Russia. This vaccine creates protection against serogroups A, C, W-135, Y and can be used from the age of nine months to 55 years. The actual issue is a vaccine tolerability, including when combined with other vaccine preparations.Objective: Our aim was to evaluate the safety of a tetravalent meningococcal conjugate vaccine against serogroups A, C, Y and W-135 when it is combined with other vaccine preparations.Methods. A prospective full-design study assessed the tolerability of immunization with a meningococcal conjugate vaccine, both in case of monovaccination and in combination with a pneumococcal 13-valent conjugate vaccine, measles-mumps-rubella, viral hepatitis A, influenza, and chicken pox vaccines.Results. 97 children aged from 9 months to 18 years were vaccinated, 20 of them were healthy and 77 had medical issues (with allergic pathology, ENT diseases, cardiovascular and nervous system diseases, lung diseases as well as orphan diseases. Among vaccinated children, general reactions were observed in 3/97 (3.1% children, local reactions — in 5 (5.2%. The post-vaccination period passed asymptomatically and uneventfully in the prevailing majority of children vaccinated with a tetravalent meningococcal conjugate vaccine (in 91, 93.8%.Conclusion. The immunization with a tetravalent meningococcal conjugate vaccine against serogroups A, C, Y, W-135 is well tolerated, both in case of monovaccination and in combination with other vaccine preparations, in healthy children of different age groups and in patients with different health status.

Addressing the Teaching of English Language Learners in the United States: A Case Study of Teacher Educators' Response

Science.gov (United States)

Hallman, Heidi L.; Meineke, Hannah R.

2016-01-01

This article discusses teacher educators' response to how teacher education programs should prepare prospective teachers to be teachers of English language learners. In the case study presented, the authors note that discussions have ensued about whether teaching English language learners (ELLs) should be addressed through separate coursework or…

A comparative study on music teacher preparation in Portugal and Brazil

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Graça Mota

2012-05-01

Full Text Available The preparation of music teachers in Portugal and Brazil is the focus of this text, which aims at presenting preliminary aspects of a study in progress in the context of higher education in both countries. Inspired by comparative education methodology, the present study is investigating official documents and academic curricula offered in Portugal and Brazil for the music teachers’ preparation to promote, in different ways, the comparative reflection with an emphasis on school education. The music teachers’ education in both countries was analyzed taking into account the following elements: educational context in Portugal and Brazil; music preparation prior to higher education, and the entrance criteria in the courses that are offered for music teachers; curricular elements of the courses; teaching practice and professional perspectives. The preliminary results of this comparative analysis demonstrate similarities and differences in the two contexts: 1 in both countries, music teachers for regular schools receive their degrees in higher education institutions, and in Portugal, beyond the Licenciatura in Music, a Music Education Master degree is demanded; 2 in both countries specific entrance tests are accomplished in the universities, demanding previous musical knowledge; 3 the balance among the musical and pedagogical preparation is one of the curricular objectives; 4 the teaching practice is an emphasized component in the teachers’ preparation; 5 in Portugal, student’s motivation for the work in the regular school appears to be larger than in Brazil.

Coffee Enema for Preparation for Small Bowel Video Capsule Endoscopy: A Pilot Study

Science.gov (United States)

Kim, Eun Sun; Keum, Bora; Seo, Yeon Seok; Jeen, Yoon Tae; Lee, Hong Sik; Um, Soon Ho; Kim, Chang Duck; Ryu, Ho Sang

2014-01-01

Coffee enemas are believed to cause dilatation of bile ducts and excretion of bile through the colon wall. Proponents of coffee enemas claim that the cafestol palmitate in coffee enhances the activity of glutathione S-transferase, an enzyme that stimulates bile excretion. During video capsule endoscopy (VCE), excreted bile is one of the causes of poor preparation of the small bowel. This study aimed to evaluate the feasibility and effect of coffee enema for preparation of the small bowel during VCE. In this pilot study, 17 of 34 patients were assigned to the coffee enema plus polyethylene glycol (PEG) 2 L ingestion group, whereas the 17 remaining control patients received 2 L of PEG only. The quality of bowel preparation was evaluated in the two patient groups. Bowel preparations in the proximal segments of small bowel were not differ between two groups. In the mid and distal segments of the small intestine, bowel preparations tend to be better in patients who received coffee enemas plus PEG than in patients who received PEG only. The coffee enema group did not experience any complications or side effects. Coffee enemas may be a feasible option, and there were no clinically significant adverse events related to coffee enemas. More prospective randomized studies are warranted to improve small bowel preparation for VCE. PMID:25136541

Remote state preparation of spatial qubits

Energy Technology Data Exchange (ETDEWEB)

Solis-Prosser, M. A.; Neves, L. [Center for Optics and Photonics, Universidad de Concepcion, Casilla 4016, Concepcion (Chile) and Departamento de Fisica, Universidad de Concepcion, Casilla 160-C, Concepcion (Chile)

2011-07-15

We study the quantum communication protocol of remote state preparation (RSP) for pure states of qubits encoded in single photons transmitted through a double slit, the so-called spatial qubits. Two measurement strategies that one can adopt to remotely prepare the states are discussed. The first strategy is the well-known spatial postselection, where a single-pixel detector measures the transverse position of the photon between the focal and the image plane of a lens. The second strategy, proposed by ourselves, is a generalized measurement divided into two steps: the implementation of a two-outcome positive operator-valued measurement (POVM) followed by the spatial postselection at the focal plane of the lens by a two-pixel detector in each output of the POVM. In both cases we analyze the effects of the finite spatial resolution of the detectors over three figures of merit of the protocol, namely, the probability of preparation, the fidelity, and purity of the remotely prepared states. It is shown that our strategy improves these figures compared with spatial postselection, at the expense of increasing the classical communication cost as well as the required experimental resources. In addition, we present a modified version of our strategy for RSP of spatial qudits which is able to prepare arbitrary pure states, unlike spatial postselection alone. We expect that our study may also be extended for RSP of the angular spectrum of a single-photon field as an alternative for quantum teleportation which requires very inefficient nonlinear interactions.

Remote state preparation of spatial qubits

International Nuclear Information System (INIS)

Solis-Prosser, M. A.; Neves, L.

2011-01-01

We study the quantum communication protocol of remote state preparation (RSP) for pure states of qubits encoded in single photons transmitted through a double slit, the so-called spatial qubits. Two measurement strategies that one can adopt to remotely prepare the states are discussed. The first strategy is the well-known spatial postselection, where a single-pixel detector measures the transverse position of the photon between the focal and the image plane of a lens. The second strategy, proposed by ourselves, is a generalized measurement divided into two steps: the implementation of a two-outcome positive operator-valued measurement (POVM) followed by the spatial postselection at the focal plane of the lens by a two-pixel detector in each output of the POVM. In both cases we analyze the effects of the finite spatial resolution of the detectors over three figures of merit of the protocol, namely, the probability of preparation, the fidelity, and purity of the remotely prepared states. It is shown that our strategy improves these figures compared with spatial postselection, at the expense of increasing the classical communication cost as well as the required experimental resources. In addition, we present a modified version of our strategy for RSP of spatial qudits which is able to prepare arbitrary pure states, unlike spatial postselection alone. We expect that our study may also be extended for RSP of the angular spectrum of a single-photon field as an alternative for quantum teleportation which requires very inefficient nonlinear interactions.

Preparation, characterization and in vitro dissolution study of Nitrazepam: Cyclodextrin inclusion complex

Directory of Open Access Journals (Sweden)

J S Patel

2012-01-01

Full Text Available The objectives of this research were to prepare and characterize inclusion complexes of Nitrazepam with Hydroxypropyl-β-cyclodextrin (HPβCD and Sulfobutyl ether β-cyclodextrin (SBEβCD to study the effect of complexation on the dissolution rate of Nitrazepam, a water-insoluble drug. The phase solubility profile of Nitrazepam with Hydroxypropyl- β-cyclodextrin and Sulfobutyl ether β-cyclodextrin was an AP-type, indicating the formation of 2:1 stoichiometric inclusion complexes. Gibbs free energy values were all negative, indicating the spontaneous nature Nitrazepam solubilization and their value decreased with increase in the cyclodextrin concentration, demonstrating that the reaction conditions became more favorable as the concentration of cyclodextrins increased. Complexes of Nitrazepam were prepared with cyclodextrin using various methods such as physical mixing, kneading, spray-drying and lyophilization. The complexes were characterized by Differential scanning calorimetry, Fourier-transform infrared, scanning electron microscopy and powder X-ray diffraction studies. These studies indicated that a complex prepared by lyophilization had successful inclusion of the Nitrazepam molecule into the cyclodextrin cavity. Complexation resulted in a marked improvement in the solubility and wettability of Nitrazepam. Among all the samples, a complex prepared with Sulfobutyl ether β-cyclodextrin by lyophilization had the greatest improvement in the in vitro rate of Nitrazepam dissolution. The mean dissolution time for Nitrazepam decreased significantly after preparing complexes. The similarity factor indicated a significant difference between the release profiles of Nitrazepam from complexes, physical mixtures and plain Nitrazepam. To conclude that, the tablets containing complexes prepared with Cyclodextrins had significant improvement in the release profile of Nitrazepam as compared to tablets containing Nitrazepam without cyclodextrin.

Evaluating interactive technology for an evolving case study on learning and satisfaction of graduate nursing students.

Science.gov (United States)

Vogt, Marjorie A; Schaffner, Barbara H

2016-07-01

Nursing education is challenged to prepare students for complex healthcare needs through the integration of teamwork and informatics. Technology has become an important teaching tool in the blended classroom to enhance group based learning experiences. Faculty evaluation of classroom technologies is imperative prior to adoption. Few studies have directly compared various technologies and their impact on student satisfaction and learning. The purpose of this study was to evaluate technology enhanced teaching methods on the learning and satisfaction of graduate students in an advanced pharmacology class using an unfolding case study. After IRB approval, students were randomly assigned to one of three groups: blogging group, wiki group or webinar group. Students completed the evolving case study using the assigned interactive technology. Student names were removed from the case studies. Faculty evaluated the case study using a rubric, while blinded to the assigned technology method used. No significant difference was found on case study grades, the range of grades on the assignment demonstrated little differences between the methods used. Students indicated an overall positive impact related to networking and collaboration on a satisfaction survey. Impact of technology methods needs to be explored in other areas of graduate nursing education. Copyright © 2016 Elsevier Ltd. All rights reserved.

Leadership change: A case study analysis of strategy and control systems development

Directory of Open Access Journals (Sweden)

Alaudin Ahmadasri

2017-01-01

Full Text Available This paper reports on how a change of leadership at the CEO-level influences strategic practices and control systems development. The case study describes how the new chief executive developed and communicated his vision and strategy through control systems and structural change. The findings indicate that senior employees’ involvement in strategic plan development (through SLT mechanism in this case brought clarity and assurance to them. Meetings are important control mechanisms to structure the sharing of information and to enhance employee commitment and help decision making. It is argued leadership manifests through the interactions of leader with employees in many control practices. The findings have implications for family-owned businesses that are facing imminent change in leadership. They benefit founders/top managers that are about to change leadership of entrepreneurial firm to the next level by highlighting the importance of preparing leader’s capacity for an effective leadership role. The study also highlights some important factors which are seldom discussed in control theories.

BioFleet case studies

International Nuclear Information System (INIS)

2007-01-01

These six case studies examined the use of different biodiesel blends as fuel supply sources for businesses in British Columbia (BC). In the first case study, 6 municipalities participated in a pilot program designed to compare the performance of biodiesel and diesel fuels. Each municipality operated 2 base vehicles running on conventional diesel along with 2 similar vehicles which used biodiesel. Real time emissions tests and analyses of the vehicles using biodiesel were also conducted by 2 of the participating municipalities. All municipalities participating in the study agreed to purchase significant volumes of biodiesel. The second case study described a pilot study conducted by the City of Vancouver's equipment services branch in 2004. As a result of the study, the city now has over 530 types of equipment that use biodiesel. The third case study described a program designed by TSI Terminals in Vancouver to assess the emission reduction impact of using biodiesel at its port facility. Six different pieces of equipment were used to confirm that biodiesel could be used throughout the terminal. Test results confirmed that biodiesel blends could be used to reduce emissions. Overall emissions were reduced by 30 per cent. The fourth case study described a waste renderer that used a fleet of 36 trucks to deliver raw products to its plants. The company made the decision to use only biodiesel for its entire fleet of trucks. Since July 2005, the company has logged over 1.7 million km using biodiesel blends. The fifth case study described a salmon hatchery that switched from diesel to biodiesel in order to reduce emissions. The biodiesel blends are used to fuel the hatchery's 2 diesel generators. The hatchery has reduced emissions of greenhouse gases (GHGs) by an estimated 1800 tonnes annually. The sixth case study described how the Township of Langley has started using biodiesel for its entire fleet of of approximately 250 pieces of equipment. The township has not

Solution preparation

International Nuclear Information System (INIS)

Seitz, M.G.

1982-01-01

Reviewed in this statement are methods of preparing solutions to be used in laboratory experiments to examine technical issues related to the safe disposal of nuclear waste from power generation. Each approach currently used to prepare solutions has advantages and any one approach may be preferred over the others in particular situations, depending upon the goals of the experimental program. These advantages are highlighted herein for three approaches to solution preparation that are currently used most in studies of nuclear waste disposal. Discussion of the disadvantages of each approach is presented to help a user select a preparation method for his particular studies. Also presented in this statement are general observations regarding solution preparation. These observations are used as examples of the types of concerns that need to be addressed regarding solution preparation. As shown by these examples, prior to experimentation or chemical analyses, laboratory techniques based on scientific knowledge of solutions can be applied to solutions, often resulting in great improvement in the usefulness of results

Optimizing the construction of devices to control inaccesible surfaces - case study

Science.gov (United States)

Niţu, E. L.; Costea, A.; Iordache, M. D.; Rizea, A. D.; Babă, Al

2017-10-01

The modern concept for the evolution of manufacturing systems requires multi-criteria optimization of technological processes and equipments, prioritizing associated criteria according to their importance. Technological preparation of the manufacturing can be developed, depending on the volume of production, to the limit of favourable economical effects related to the recovery of the costs for the design and execution of the technological equipment. Devices, as subsystems of the technological system, in the general context of modernization and diversification of machines, tools, semi-finished products and drives, are made in a multitude of constructive variants, which in many cases do not allow their identification, study and improvement. This paper presents a case study in which the multi-criteria analysis of some structures, based on a general optimization method, of novelty character, is used in order to determine the optimal construction variant of a control device. The rational construction of the control device confirms that the optimization method and the proposed calculation methods are correct and determine a different system configuration, new features and functions, and a specific method of working to control inaccessible surfaces.

Colon cancer risk and different HRT formulations: a case-control study

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Thai Do

2007-05-01

Full Text Available Abstract Background Most studies have found no increased risk of colon cancer associated with hormone replacement therapy (HRT, or even a decreased risk. But information about the effects of different HRT preparations is lacking. Methods A case-control study was performed within Germany in collaboration with regional cancer registries and tumor centers. Up to 5 controls were matched to each case of colon cancer. Conditional logistic regression analysis was applied to estimate crude and adjusted odds ratios (OR and 95% confidence intervals (95% CI. Stratified analyses were performed to get an impression of the risk associated with different estrogens and progestins. Results A total of 354 cases of colon cancer were compared with 1422 matched controls. The adjusted overall risk estimate for colon cancer (ColC associated with ever-use of HRT was 0.97 (0.71 – 1.32. No clinically relevant trends for ColC risk were observed with increasing duration of HRT use, or increasing time since first or last HRT use in aggregate. Whereas the overall risk estimates were stable, the numbers in many of the sub-analyses of HRT preparation groups (estrogens and progestins were too small for conclusions. Nevertheless, if the ColC risk estimates are taken at face value, most seemed to be reduced compared with never-use of HRT, but did not vary much across HRT formulation subgroups. In particular, no substantial difference in ColC risk was observed between HRT-containing conjugated equine estrogens (CEE or medroxyprogesterone acetate (MPA and other formulations more common in Europe. Conclusion Ever-use of HRT was not associated with an increased risk of colon cancer. In contrary, most risk estimates pointed non-significantly toward a lower ColC risk in HRT ever user. They did not vary markedly among different HRT formulations (estrogens, progestins. However, the small numbers and the overlapping nature of the subgroups suggest cautious interpretation.

Stakeholder involvement in building and maintaining radiation safety infrastructure in Latvia: The case studies

International Nuclear Information System (INIS)

Eglajs, A.; Salmins, A.

2003-01-01

This paper comprises the assessment of interests for central and local governments, different authorities, public and commercial companies, political parties and non-governmental organizations, organised and ad-hock groups of public, which could contribute to development and maintenance of infrastructure for radiation safety, general environmental protection, as well as for public health among other similar fields. Understanding of these interests allows to be prepared for eventual demonstrations or publications against decisions about significant modifications of infrastructure and provides ideas how to explain needs of financial and human resources for maintaining of supervisory system and management of major facilities, which are vital for safety infrastructure. Two case studies are presented in this report related to modification of the framework law and the preparation of radioactive waste management strategy. (author)

Describing Case Study Method and Identifying the Factors that Contribute to the Successful Conduct of Case Studies

OpenAIRE

Ahmad H. Juma'h; Mustafa Cavus

2001-01-01

This article has attempted to describe case study, the limitations and critiques on case study methodology and how the proponents have responded to these. Our special focus have been on the debate on theory building from case study research, and a framework for conducting case study research as well as the factors for a successful case study research. The overall conclusion is that the case study has been inappropriately used to generate theories.

Investigation of Public Charging Infrastructure : Case study Gränby sportfält

OpenAIRE

Dahl, Emma; Hedström, Andreas; Lindgren, Anna

2017-01-01

The municipal company Sportfastigheter AB is currently renovating and developing Gränby sportfält, a sports field in Uppsala. Adjacent to the sports field, a parking lot for 700 vehicles is located, where Sportfastigheter AB is preparing to install charging points for electric vehicles (EVs) at some of the places. This bachelor thesis aims to investigate how a public charging solution should be modeled, with the parking lot at Gränby sportfält as a case study. The investigation involves estim...

A "how-to" guide in preparing abstracts and poster presentations.

Science.gov (United States)

Boullata, Joseph I; Mancuso, Carissa E

2007-12-01

The preparation of an abstract or poster to share information from a project or case report with colleagues is a professional goal for many nutrition support practitioners. This paper provides an approach to help practitioners prepare an abstract for submission and subsequently a poster for presentation at a meeting. A nutrition support question that required collecting and evaluating information, or a unique patient case or case series, can serve as the focus of an abstract and subsequent poster. The professional meeting selected should be appropriate for the abstract topic, and the authors should closely adhere to the organization's abstract submission guidelines. The well-prepared abstract will then serve as the outline for the poster content; the visual aspect of the poster is also important to effectively communicate the information to colleagues at the meeting. Adequate time is required to prepare both the abstract and the poster in order to fittingly reflect the value of the information. Efforts in preparing the abstract will be worthwhile once the abstract has been accepted by reviewers for a poster session at the meeting. Likewise, the effort in preparing the poster in advance allows the presenter to enjoy the poster session and discuss the project with colleagues.

How To Set Up Your Own Small Business. Service Company Case Study. Manufacturing Firm Case Study. Retail Store Case Study.

Science.gov (United States)

Fallek, Max

This collection of case studies is intended for use in a course in setting up a small business. The first, a case study of the process of setting up a service company, covers analyzing the pros and cons of starting one's own business, assessing the competition and local market, and selecting a site for and financing the business. The principal…

Impact of bowel preparation type on the quality of colonoscopy: a multicenter community-based study

Directory of Open Access Journals (Sweden)

Daniel Martin

2016-04-01

Full Text Available Background: High-quality bowel preparation is crucial for achieving the goals of colonoscopy. However, choosing a bowel preparation in clinical practice can be challenging because of the many formulations. This study aims to assess the impact the type of bowel preparation on the quality of colonoscopy in a community hospital setting. Methods: A retrospective, observational study was conducted utilizing a colonoscopy screening/surveillance database in central Illinois during the period of January 1, 2010, to March 31, 2014. Patients without bowel preparation assessment were excluded from this study. Controlling for the confounders, generalized linear models were used to estimate the adjusted impact [odds ratio (OR] of bowel preparation type on the quality of preparation (excellent, good, fair, and poor, and on the detection of advanced adenoma. The association between the time of withdrawal after insertion and the quality of preparation was also examined using a linear model. Results: A total of 28,368 colonoscopies; half the patients were male, and the average age was 61±9 years. Polyethylene glycol (PEG was used in the majority (70.2% of bowel preparations, followed by sodium sulfate (21.4%, sodium phosphate (2.5%, magnesium sulfate (0.4%, and others. Compared with PEG, magnesium sulfate had a poorer quality of bowel preparations (OR=0.6, 95% CI 0.4–0.9; p<0.05, whereas the quality of bowel preparation was significantly improved by using sodium sulfate (OR=5.7, 95% CI 5.4–6.1; p<0.001 and sodium phosphate (OR=2.1, 95% CI 1.8–2.5; p<0.001. For those who had adequate bowel preparation, the better quality of preparation significantly increased the detection rate of advanced adenoma (5.0, 3.6, and 2.9% for excellent, good, and fair, respectively. Conclusion: When possible, sodium sulfate–based preparations should be recommended in the community setting for colonoscopy because of their high quality of bowel preparation.

Preparation and study of dialkyl nitroxide radicals; Preparation et etude de radicaux nitroxydes diacyles

Energy Technology Data Exchange (ETDEWEB)

Chenavas, P [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

1969-07-01

These radicals are obtained by oxidation of N-hydroxy-imides with lead tetracetate or p-nitro-perbenzoic acid. These imides are prepared by heating dicarboxylic acids anhydrides with benzyloxy-amine followed by catalytic hydrogenation of N-benzyloxy-imides so obtained. Two series of radicals have mainly been studied, the first concerning five-membered cyclic imides, the second six-membered cyclic imides, these molecules having methyls substituents or no on the carbon ring. N. M. R. spectra of some O-benzyl-imides have been analysed. These different results have made it possible to study the conformation and stereochemistry of these imides. (author) [French] Ces radicaux sont obtenus par oxydation d'imides N-hydroxyles par le tetracetate de plomb ou l'acide p-nitroperbenzoique; ces imides sont prepares par chauffage d'anhydrides de diacides en presence de benzyloxyamine suivie d'une hydrogenation catalytique des N-benzyloxyimides ainsi obtenus. Deux series de radicaux ont principalement ete etudies: la premiere relative a des imides cycliques a cinq chainons, la seconde a des imides cycliques a six chainons, ces molecules ayant des substituants methyles ou non sur la chaine carbonee. Les derives O-benzyles de quelques-uns de ces imides ont ete analyses en R. M. N. Ces differents resultats ont permis une etude de la conformation et de la stereochimie de ces imides. (auteur)

Preparation and study of dialkyl nitroxide radicals; Preparation et etude de radicaux nitroxydes diacyles

Energy Technology Data Exchange (ETDEWEB)

Chenavas, P. [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

1969-07-01

These radicals are obtained by oxidation of N-hydroxy-imides with lead tetracetate or p-nitro-perbenzoic acid. These imides are prepared by heating dicarboxylic acids anhydrides with benzyloxy-amine followed by catalytic hydrogenation of N-benzyloxy-imides so obtained. Two series of radicals have mainly been studied, the first concerning five-membered cyclic imides, the second six-membered cyclic imides, these molecules having methyls substituents or no on the carbon ring. N. M. R. spectra of some O-benzyl-imides have been analysed. These different results have made it possible to study the conformation and stereochemistry of these imides. (author) [French] Ces radicaux sont obtenus par oxydation d'imides N-hydroxyles par le tetracetate de plomb ou l'acide p-nitroperbenzoique; ces imides sont prepares par chauffage d'anhydrides de diacides en presence de benzyloxyamine suivie d'une hydrogenation catalytique des N-benzyloxyimides ainsi obtenus. Deux series de radicaux ont principalement ete etudies: la premiere relative a des imides cycliques a cinq chainons, la seconde a des imides cycliques a six chainons, ces molecules ayant des substituants methyles ou non sur la chaine carbonee. Les derives O-benzyles de quelques-uns de ces imides ont ete analyses en R. M. N. Ces differents resultats ont permis une etude de la conformation et de la stereochimie de ces imides. (auteur)

IRRIGOGRAPHY AFTER PREPARATIONS OF PATIENTS WITH FORTRANS

Directory of Open Access Journals (Sweden)

Irena Jankovic

2006-01-01

Full Text Available Fortrans® is a laxative in the form of the powder which is used for making solution for oral application. Laxative effects are achieved over long linear polymer (polyethylene-glikol - PEG 4000 which binds water molecules, increasing thus the volume of fluids in the intestinal tract.Material of study comprises 150 irrigographies made at the Institute of Radiology of the Clinical Center in Nis in the period from January 2004 to Jun 2005.The preparation in these cases was done by Fortrans®. The contrast medium used was barium sulfate.The results of study are presented in illustrations and irrigograms.In conclusion,we can say that Fortrans® provides reliable, effective and simple preparation of patients for irrigography as well as for fast, comfortable and efficient endographic examination (irrigography. The obtained irrigograms are of satisfactory quality, showing sharp contrasts.

Theory Testing Using Case Studies

DEFF Research Database (Denmark)

Møller, Ann-Kristina Løkke; Dissing Sørensen, Pernille

2014-01-01

The appropriateness of case studies as a tool for theory testing is still a controversial issue, and discussions about the weaknesses of such research designs have previously taken precedence over those about its strengths. The purpose of the paper is to examine and revive the approach of theory...... testing using case studies, including the associated research goal, analysis, and generalisability. We argue that research designs for theory testing using case studies differ from theorybuilding case study research designs because different research projects serve different purposes and follow different...... research paths....

A new hysteroscopic technique for the preparation of partially intramural myomas in office setting (OPPIuM technique): A pilot study.

Science.gov (United States)

Bettocchi, Stefano; Di Spiezio Sardo, Attilio; Ceci, Oronzo; Nappi, Luigi; Guida, Maurizio; Greco, Elena; Pinto, Lauro; Camporiale, Anna Lina; Nappi, Carmine

2009-01-01

To assess the safety and the effectiveness of a novel hysteroscopic technique for the Office Preparation of Partially Intramural Myomas (OPPIuM), to facilitate the subsequent, already scheduled, resectoscopic myomectomy. Pilot study. University of Bari, Naples and Foggia. Fifty-nine fertile women (age 27-48 years) diagnosed at office hysteroscopy as having symptomatic submucous myomas>1.5 cm with intramural development (G1 and G2), scheduled for resectoscopic surgery. The OPPIuM technique consisted of an incision of the endometrial mucosa covering the myoma by means of Fr scissors or bipolar Versapoint Twizzle electrode, along its reflection line on the uterine wall, up to the precise identification of the cleavage surface between the myoma and its pseudo-capsule. Such procedure was aimed at triggering the protrusion of the intramural portion of the myoma into the uterine cavity during the following menstrual cycles, thus facilitating the subsequent total removal of the lesion via resectoscopic surgery. All patients underwent follow-up in-patient hysteroscopy after 2 menstrual cycles before resectoscopic surgery were performed. The OPPIuM technique was successfully performed in all cases. The mean diameter of successfully prepared myomas was 2.9+/-0.8 cm. At follow-up hysteroscopy, the conversion of partially intramural myomas into totally or prevalently intracavitary ones was observed in 93.2% (55/59) of cases. In 2 of 3 cases of failure, the myomas' size was>4 cm. One patient was excluded from the study because of the occurrence of total spontaneous expulsion of the myoma at the subsequent menstrual cycle. Our preliminary findings seem to support the safety and the effectiveness of the OPPIuM procedure by reporting the conversion of myomas with intramural development>1.5 cm into totally or prevalently intracavitary ones in nearly 93% of cases. Such technique may allow surgeons to perform resectoscopic surgery more safely and quickly as dealing with prevalently

Theory testing using case studies

DEFF Research Database (Denmark)

Dissing Sørensen, Pernille; Løkke Nielsen, Ann-Kristina

2006-01-01

on the strengths of theory-testing case studies. We specify research paths associated with theory testing in case studies and present a coherent argument for the logic of theoretical development and refinement using case studies. We emphasize different uses of rival explanations and their implications for research...... design. Finally, we discuss the epistemological logic, i.e., the value to larger research programmes, of such studies and, following Lakatos, conclude that the value of theory-testing case studies lies beyond naïve falsification and in their contribution to developing research programmes in a progressive......Case studies may have different research goals. One such goal is the testing of small-scale and middle-range theories. Theory testing refers to the critical examination, observation, and evaluation of the 'why' and 'how' of a specified phenomenon in a particular setting. In this paper, we focus...

Application and Assessment of Extension of Time Claim: Findings of Case Studies Conducted in Malaysia

Directory of Open Access Journals (Sweden)

M.S. Mohd Danuri,

2006-12-01

Full Text Available It is a common phenomenon for construction projects to have applications for extension of time. Many problems are encountered in practice in the application and preparation of extension of time claims. A study was conducted to identify the main problems encountered in the application and assessment of extension of time claim in selected construction projects in Malaysia. Three (3 case studies have been used 10 investigate the extension of time issues. Findings from the study revealed that local contractors usually fail to comply with the contract procedural requirements to submit timely notification of delay and have difficulty in demonstrating their entitlement for extension of time. The main problem faced by contract administrators is that contractors tend to "inflate" their extension of time entitlement with the intention to maximise their claims. Adherence to the agreed procedure in preparing and evaluating of delay claims and the implementation of a set of agreed standardised delay analysis may help to minimize the frequency and impact of such problems.

The effect of surface preparation on the behaviour of double strap adhesive joints with thick steel adherents

DEFF Research Database (Denmark)

Anyfantis, K.N.; Tsouvalis, N.G.

2009-01-01

for preparing the bonding surfaces are investigated, namely grit blasting (GB) and simple sandpaper (SP). The behaviour of the joints, in terms of the force-displacement and strains-displacement responses was monitored and compared for both cases. The joints with SP surface preparation exhibited slightly lower...... stiffness and lower strength than the joints with GB surface preparation, while the latter failed at a lower displacement. In both cases, failure initiated at the free edges of the joints and the dominating failure mode was interfacial. In addition to the above experimental measurements, results are also......One of the major factors determining the integrity of an adhesive bond is the preparation of the bonding surfaces. The present study is an experimental investigation of the effect of the surface preparation procedure on the response of a steel-to-steel double strap adhesive joint. Two procedures...

Five Misunderstandings About Case-Study Research

DEFF Research Database (Denmark)

Flyvbjerg, Bent

2006-01-01

This article examines five common misunderstandings about case-study research: (a) theoretical knowledge is more valuable than practical knowledge; (b) one cannot generalize from a single case, therefore, the single-case study cannot contribute to scientific development; (c) the case study is most...... useful for generating hypotheses, whereas other methods are more suitable for hypotheses testing and theory building; (d) the case study contains a bias toward verification; and (e) it is often difficult to summarize specific case studies. This article explains and corrects these misunderstandings one...

Study on non-ionic membrane prepared by radiation-induced graft polymerization

International Nuclear Information System (INIS)

Hegazy, E.-S.A.; Mokhtar, S.M.; Osman, M.B.S.; Mostafa, A.E.-K.B.

1990-01-01

The preparation of good hydrogel supported on polymeric material was carried out by means of direct radiation-induced graft polymerization of N-vinyl-2-pyrrolidone (NVP) onto low density polyethylene films (LDPE). The optimum conditions were determined, at which the grafting process occurred and suitable degrees of grafting were obtained with a homogeneous distribution of the graft chains throughout the polymer. The effect of different inhibitors, addition of ZnCl 2 and monomer concentration on the grafting yield was also studied. Some investigations and characterization on the prepared graft copolymer were investigated and the possibility of its practical use was discussed. Mechanical properties, thermal and chemical stability and hydrophilic properties of such prepared grafted films showed a great promise in some practical applications. (author)

Impact of a stay in the intensive care unit on the preparation of Advance Directives: Descriptive, exploratory, qualitative study.

Science.gov (United States)

Andreu, Pascal; Dargent, Auguste; Large, Audrey; Meunier-Beillard, Nicolas; Vinault, Sandrine; Leiva-Rojas, Uriel; Ecarnot, Fiona; Prin, Sébastien; Charles, Pierre-Emmanuel; Fournel, Isabelle; Rigaud, Jean-Philippe; Quenot, Jean-Pierre

2018-04-01

Our objective was to assess, through a qualitative, exploratory study, the thought processes of patients regarding the formulation of advance directives (AD) after a stay in the ICU. The study was conducted from May to July 2016 using telephone interviews performed by four senior ICU physicians. Inclusion criteria were: patients discharged from ICU to home>3 months earlier. Semi-directive interviews with patients focused on 5 main points surrounding AD. In total, among 159 eligible patients, data from 94 (59%) were available for analysis. Among all those interviewed, 83.5% had never heard of "advance directives". Only 2% had executed AD before ICU admission, and 7% expressed a desire to prepare AD further to their ICU stay. Among the barriers to preparation of AD, lack of information was the main reason cited for not executing AD. Patients noted the following in their AD: withdrawal of life-support in case of vegetative/minimally conscious state or when there is no longer any hope, in case of uncontrollable pain, and if impossible to wean from mechanical ventilation. The ideal time to engage patients in these discussions is most likely well before an acute health event occurs, although this warrants further investigation both before and after ICU admissions. Copyright © 2017 Société française d’anesthésie et de réanimation (Sfar). Published by Elsevier Masson SAS. All rights reserved.

Different crystal morphologies arising from different preparation methods of a same polymorphic form may result in different properties of the final materials: the case of diclofenac sodium trihydrate.

Science.gov (United States)

Rodomonte, Andrea; Antoniella, Eleonora; Bertocchi, Paola; Gaudiano, Maria Cristina; Manna, Livia; Bartolomei, Monica

2008-09-29

Diclofenac sodium is a nonsteroidal anti-inflammatory drug widely used in painful and inflammatory diseases. It can exist in different hydrate phases. Recently the physico-chemical and pharmaceutical properties of a trihydrate form, named DSH3 were reported by the same authors. This short communication discusses how samples of a same polymorphic form can display dissimilar analytical signatures when obtained by different routes. Data from hot-stage microscopy, FT-IR spectroscopy, X-ray powder diffraction (XRDP) and thermal analysis were used to characterise the DSH3 samples prepared by different methods. Through the case study of diclofenac sodium, this work highlights how the method used to prepare a specific crystal modification can generate samples with different morphologies and therefore different properties and physical stability.

Obtaining of labelled 'Co-101' preparation and study of its pharmacological kinetics

International Nuclear Information System (INIS)

Khujaev, S.; Sultanov, A.; Ganiev, D.A.; Tashmetov, M.; Shermatova, L.; Aliev, Kh.U.; Nazarov, E.A.

2004-01-01

Full text: One of the most actual problems for the last years is the problem of studying physiological role of microelements in animate nature and their use in biological and medical practice. For some time coordination compounds of microelements are used more bots as less toxic and biologically active medical products. Among numerous microelements favorably influencing a number of physiological processes in an organism, special place takes Cobalt. This element differs from others in that it is part of vitamin B 12 (4,5%). Microorganisms for biosynthesis of B 12 in an organism use Cobalt. At lack of vitamin B 12 in an organism, preparations and concentrates of the vitamin B 12 may be used. One of such preparations is the new preparation 'Co-101', synthesized in Tashkent Pharmaceutical Institute. The given preparation is coordination compound of Cobalt with Inozin. In research of the new preparation Co-101', the most modern method - radio indication (a method of labeled compounds) is used. For labeling of the preparation 57 Co and 58 Co radioisotopes are used. Radioisotopes are obtaining in a nuclear reactor ( 58 Co) and on cyclotron ( 57 Co). From the point of radioactive safety, the more favorable appeared to be 57 Co. Two variants of introduction of radioactive Cobalt in chemical structure of a preparation are of considered: 1-by exchange of an isotope, 2- by introduce of radioisotopes Cobalt into asparagine Cobalt at stage of it synthesis, which is an intermediate product during synthesis of preparation 'Co-101'. The second method had been yield with output compound of up 80% and higher. Received labeling preparation has been used for investigation of his own pharmacological kinetics

Electrochemical and Thermal Studies of Prepared Conducting Chitosan Biopolymer Film

International Nuclear Information System (INIS)

Hlaing Hlaing Oo; Kyaw Naing; Kyaw Myo Naing; Tin Tin Aye; Nyunt Wynn

2005-09-01

In this paper, chitosan based conducting bipolymer films were prepared by casting and solvent evaporating technique. All prepared chitosan films were of pale yellow colour, transparent, and smooth. Sulphuric acid was chosen as the cross-linking agent. It enhanced conduction pathway in cross-linked chitosan films. Mechanical properties, solid-state, and thermal behavior of prepared chitosan fimls were studied by means of a material testing machine, powder X-ray diffractometry (XRD), thermogravimetric analysis (TG-DTG), and differential scanning calorimetry (DSC). By the XRD diffraction pattern, high molecular weight of chitosan product indicates the semi-crystalline nature, but the prepared chitosan film and doped chitosan film indicate significantly lower in crystallinity prove which of the amorphous characteristics. In addition, DSC thermogram of pure chitosan film exhibited exothermic peak around at 300 C, indicating polymer decomposition of chitosan molecules in chitosan films. Furthermore, these DSC thermograms clearly showed that while pure chitosan film display exothermal decomposition, the doped chitosan films mainly endothermic characteristics. The ionic conductivity of doped chitosan films were in the order of 10 to 10 S cm , which is in the range of semi-conductor. These results showed that cross-linked chitoson films may be used as polymer electrolyte film to fabricate solid state electrochemical cells

Fuzzy-Set Case Studies

Science.gov (United States)

Mikkelsen, Kim Sass

2017-01-01

Contemporary case studies rely on verbal arguments and set theory to build or evaluate theoretical claims. While existing procedures excel in the use of qualitative information (information about kind), they ignore quantitative information (information about degree) at central points of the analysis. Effectively, contemporary case studies rely on…

Preparation of powders Ag3PO4 and study of their photocatalytic activity

International Nuclear Information System (INIS)

Badurova, K.

2014-01-01

In our thesis we dealt with preparing powders of Ag 3 PO 4 by using Na 2 HPO 4 ·12H 2 O and Na 3 PO 4 ·12H 2 O as two different precursors. Samples were prepared by precipitation and mechanochemical methods. Photocatalytic efficiency of individual samples was studied by irradiation of suspensions of prepared powders with methylene blue (MB) solution and with phenol solution using source of light similar to solar light. Photocatalytic efficiency was determined via method of determination of total organic carbon (TOC) as the time dependence of phenol concentration and also via monitoring spectrophotometric parameters of solution as the time dependence of MB solution colouring intensity. Effect of sample preparation method on photocatalytic efficiency and morphology of particles was studied. After that, samples were characterised by X-ray powder diffraction method (XRD), scanning electron microscopy (SEM) and Raman spectroscopy (authors)

Integrating Tax Preparation with FAFSA Completion: Three Case Models

Science.gov (United States)

Daun-Barnett, Nathan; Mabry, Beth

2012-01-01

This research compares three different models implemented in four cities. The models integrated free tax-preparation services to assist low-income families with their completion of the Free Application for Federal Student Aid (FAFSA). There has been an increased focus on simplifying the FAFSA process. However, simplification is not the only…

Cr(VI) generation during sample preparation of solid samples – A ...

African Journals Online (AJOL)

Cr(VI) generation during sample preparation of solid samples – A chromite ore case study. R.I Glastonbury, W van der Merwe, J.P Beukes, P.G van Zyl, G Lachmann, C.J.H Steenkamp, N.F Dawson, M.H Stewart ...

Cellient™ automated cell block versus traditional cell block preparation: a comparison of morphologic features and immunohistochemical staining.

Science.gov (United States)

Wagner, David G; Russell, Donna K; Benson, Jenna M; Schneider, Ashley E; Hoda, Rana S; Bonfiglio, Thomas A

2011-10-01

Traditional cell block (TCB) sections serve as an important diagnostic adjunct to cytologic smears but are also used today as a reliable preparation for immunohistochemical (IHC) studies. There are many ways to prepare a cell block and the methods continue to be revised. In this study, we compare the TCB with the Cellient™ automated cell block system. Thirty-five cell blocks were obtained from 16 benign and 19 malignant nongynecologic cytology specimens at a large university teaching hospital and prepared according to TCB and Cellient protocols. Cell block sections from both methods were compared for possible differences in various morphologic features and immunohistochemical staining patterns. In the 16 benign cases, no significant morphologic differences were found between the TCB and Cellient cell block sections. For the 19 malignant cases, some noticeable differences in the nuclear chromatin and cellularity were identified, although statistical significance was not attained. Immunohistochemical or special stains were performed on 89% of the malignant cases (17/19). Inadequate cellularity precluded full evaluation in 23% of Cellient cell block IHC preparations (4/17). Of the malignant cases with adequate cellularity (13/17), the immunohistochemical staining patterns from the different methods were identical in 53% of cases. The traditional and Cellient cell block sections showed similar morphologic and immunohistochemical staining patterns. The only significant difference between the two methods concerned the lower overall cell block cellularity identified during immunohistochemical staining in the Cellient cell block sections. Copyright © 2010 Wiley-Liss, Inc.

Case Study: Guidelines for Producing Videos to Accompany Flipped Cases

Science.gov (United States)

Prud'homme-Généreux, Annie; Schiller, Nancy A.; Wild, John H.; Herreid, Clyde Freeman

2017-01-01

Three years ago, the "National Center for Case Study Teaching in Science" (NCCSTS) was inspired to merge the case study and flipped classroom approaches. The resulting project aimed to create the materials required to teach a flipped course in introductory biology by assigning videos as homework and case studies in the classroom. Three…

[Clinical study of the effect of preventing dentine hypersensitiveness by using Fluor Protector and Green Or on the prepared vital pulp abutment teeth].

Science.gov (United States)

Qin, Jia-nan; Lu, Yu-miao; Zhou, Xiao-yan

2005-04-01

To study and evaluate the effect preventing dentine hypersensitiveness by using Fluor Protector or Green Or on the prepared vital pulp abutment teeth of PFM bridges. 118 cases, 246 prepared vital pulp abutment teeth, were randomly divided into three groups: Experimental Group A--treated with the Fluor Protector and temporary crown; Experimental Group B--treated with the Green Or and temporary crown, and Control Group--only using temporary crown. The results of desensitization in 3 groups were evaluated. F test was used for analysis (DSPV6.01). Significant differences were found between experimental Group A, B and the control group after 1 week (when cementing the PFM bridges); and also after 1 month (P0.05). The effect of preventing dental hypersensitiveness by using Fluor Protector or Green Or on the prepared vital pulp abutment teeth of PFM bridges is ideal. It is easy to use and worth being widely applied.

Study of nano-nitramine explosives: preparation, sensitivity and application

Directory of Open Access Journals (Sweden)

Jie Liu

2014-06-01

Full Text Available Nano-nitramine explosives (RDX, HMX, CL-20 are produced on a bi-directional grinding mill. The scanning electron microscope (SEM observations show that the prepared particles are semi-spherical, and the narrow size distributions are characterized using the laser particle size analyzer. Compared with the micron-sized samples, the nano-products show obvious decrease in friction and impact sensitivities. In the case of shock sensitivities, nano-products have lower values by 59.9% (RDX, 56.4% (HMX, and 58.1% (CL-20, respectively. When nano-RDX and nano-HMX are used in plastic bonded explosives (PBX as alternative materials of micron-sized particles, their shock sensitivities are significantly decreased by 24.5% (RDX and 22.9% (HMX, and their detonation velocities are increased by about 1.7%. Therefore, it is expected to promote the application of nano-nitramine explosives in PBXs and composite modified double-based propellants (CMDBs so that some of their properties would be improved.

Experimental studies of thermal preparation of internal combustion engine

Science.gov (United States)

Karnaukhov, N. N.; Merdanov, Sh M.; V, Konev V.; Borodin, D. M.

2018-05-01

In conditions of autonomous functioning of road construction machines, it becomes necessary to use its internal sources. This can be done by using a heat recovery system of an internal combustion engine (ICE). For this purpose, it is proposed to use heat accumulators that accumulate heat of the internal combustion engine during the operation of the machine. Experimental studies have been carried out to evaluate the efficiency of using the proposed pre-start thermal preparation system, which combines a regular system based on liquid diesel fuel heaters and an ICE heat recovery system. As a result, the stages of operation of the preheating thermal preparation system, mathematical models and the dependence of the temperature change of the antifreeze at the exit from the internal combustion engine on the warm-up time are determined.

Five misunderstandings about case study research

DEFF Research Database (Denmark)

Flyvbjerg, Bent

2004-01-01

This article examines five common misunderstandings about case-study research: (1) Theoretical knowledge is more valuable than practical knowledge; (2) One cannot generalize from a single case, therefore the single case study cannot contribute to scientific development; (3) The case study is most...... useful for generating hypotheses, while other methods aremore suitable for hypotheses testing and theory building; (4) The case study contains a bias toward verification; and (5) It is often difficult to summarize specific case studies. The article explains and corrects these misunderstandings one by one...... and concludes with the Kuhnian insight that a scientific discipline without a large number of thoroughly executed case studies is a discipline without systematic production of exemplars, and that a discipline without exemplars is an ineffective one. Social science may be strengthened by the execution of more...

Using Interactive Case Studies to Support Students Understandings of Local Environmental Problems

Directory of Open Access Journals (Sweden)

Z. Kostova

2012-12-01

Full Text Available The article presents designed and refined an interactive-enhanced curriculum module for 9th grade secondary school students in Bulgaria, based on environmental case studies. In the module activities students from two schools studied the local environments, performed observations and experiments, collected and analyzed data, prepared and presented posters and role plays, made connections between scientific processes and socio-scientific issues and drew conclusions about the global effects of locally created environmental problems. The students’ critical observations of the quality of their surroundings helped them to make a list of local environmental problems, to apply interactive strategies in studying them and to propose rational scientifically based solutions. In the study the attention was directed to the advantages and disadvantages of poster presentations and role playing and to the specific learning difficulties that students had to overcome. Students’ achievements from the two experimental schools were assessed independently in order to give us insights into the details of learning using different interactive strategies and into the acquired performance skills, dependant on students’ interests and personal abilities. The three versions of the module (traditional, dominated by teacher presentation; poster preparation and presentation in which students imitate scientific team research; and role playing in which students not only study the local environmental problems but assume social roles to cope with them demonstrate three levels of students learning independence. Specific assessment tests and check lists were developed for analyzing, evaluating and comparing students’ achievements in each version of the module and in each school. Ecological knowledge assessment tests were based on Bloom’s taxonomy of educational objectives. Poster and role playing preparations and presentations were assessed by specific criteria, shown in the

Preparing Globally Competent Teacher Candidates through Cross-Cultural Experiential Learning

Science.gov (United States)

Kopish, Michael A.

2016-01-01

This manuscript presents findings and implications from a case study of one global educator's attempt to develop globally competent teacher candidates in an elective teacher preparation course. Global Citizenship Education served as the framing paradigm for the course and human experiences of immigrants and refugees served as the milieu for…

Case Study: A Picture Worth a Thousand Words? Making a Case for Video Case Studies

Science.gov (United States)

Pai, Aditi

2014-01-01

A picture, they say, is worth a thousand words. If a mere picture is worth a thousand words, how much more are "moving pictures" or videos worth? The author poses this not merely as a rhetorical question, but because she wishes to make a case for using videos in the traditional case study method. She recommends four main approaches of…

Five misunderstandings about Case-study Research

DEFF Research Database (Denmark)

Flyvbjerg, Bent

This article examines five common misunderstandings about case-study research: (1) Theoretical knowledge is more valuable than practical knowledge; (2) One cannot generalize from a single case, therefore the single case study cannot contribute to scientific development; (3) The case study is most...... useful for generating hypotheses, while other methods aremore suitable for hypotheses testing and theory building; (4) The case study contains a bias toward verification; and (5) It is often difficult to summarize specific case studies. The article explains and corrects these misunderstandings one by one...... and concludes with the Kuhnian insight that a scientific discipline without a large number of thoroughly executed case studies is a discipline without systematic production of exemplars, and that a discipline without  exemplars is an ineffective one. Social science may be strengthened by the execution of more...

Preparation of plant-specific NDA reference material

International Nuclear Information System (INIS)

Abedin-Zadeh, R.; Beetle, T.; Kuhn, E.; Terrey, D.; Turel, S.; Busca, G.; Guardini, S.

1983-01-01

The importance of having suitable and well characterized non-destructive assay (NDA) reference materials for the verification activities of the safeguards control authorities is stressed. The Euratom Inspectorate and the IAEA have initiated an extensive programme for the procurement and preparation of Joint Euratom/IAEA safeguards NDA reference materials with the active participation of the Ispra Establishment of the Euratom Joint Research Centre. The different type and nature of materials, condition of measurements, and plant characteristics and provisions had to be taken into account for plant-specific NDA reference materials. The preparation of each reference material was planned case by case and specific criteria such as limitations in different facilities, measurement capabilities, conditions, product availability and population variability are being ascertained. A procurement scheme was prepared describing step-by-step procedures detailing responsibilities, measurement conditions, destructive analysis schemes, desired characteristics and methods of data evaluation. This paper describes the principles and procedures carried out for the preparation of a reference MOX pin, low enriched uranium reference rods, low enriched uranium reference drums, reference MTR assemblies, and THTR reference pebbles. The scheme for each characterization technique is presented. (author)

Studies on preparation of mixed toffee from guava and strawberry.

Science.gov (United States)

Chavan, U D; Pawar, U B; Pawar, G H

2015-10-01

The present investigation was carried out to develop a technology for preparation of mixed toffee from guava and strawberry pulp and to study the changes in chemical composition and sensory properties of toffee during storage at ambient temperature as well as refrigerated condition. Preliminary experiments were conducted to find out optimum levels of guava and strawberry pulp. The toffees prepared were wrapped in metallic coated polythene wrapper, packed in 200 gauge polythene bags and stored at ambient (27 ± 2 oC) as well as refrigerated (5 ± 2 oC) condition for 90 days. The stored samples were drawn periodically at 30 days interval for organoleptic and chemical analysis. Preliminary studies were carried out to standardize the optimum levels of guava and strawberry pulp. Among various combinations of guava and strawberry pulp, 70 : 30 w/w (guava : strawberry) ratios toffee was found better than other combinations in respect to organoleptic properties and nutritional quality. The yield of fresh toffee was higher (868 g/kg of pulp) in toffee prepared from 100 % guava (control). The chemical composition indicated that the fresh toffees contained on an average moisture 8.73 %, TSS 83.21 oBrix, titrable acidity 0.3 %, total sugars 73.1 % and ascorbic acid 64.1 mg/100 g. The mean score of fresh toffees for colour and appearance was 8.29, texture 8.02, flavour 8.22, taste 8.32 and overall acceptability 8.16 on 9 point Hedonic scale. The cost of fresh toffee was Rs. 282/kg which was prepared from 70 : 30 guava and strawberry pulp level. The storage studies indicated that the TSS and total sugars increased with the advancement of storage period, while moisture content, ascorbic acid and acidity decreased. The rates of increase or decrease were relatively higher at ambient temperature than refrigerated temperature. The sensory quality of toffees also decreased at faster rate during 90 days storage period at ambient condition than the refrigerated

Case study method and problem-based learning: utilizing the pedagogical model of progressive complexity in nursing education.

Science.gov (United States)

McMahon, Michelle A; Christopher, Kimberly A

2011-08-19

As the complexity of health care delivery continues to increase, educators are challenged to determine educational best practices to prepare BSN students for the ambiguous clinical practice setting. Integrative, active, and student-centered curricular methods are encouraged to foster student ability to use clinical judgment for problem solving and informed clinical decision making. The proposed pedagogical model of progressive complexity in nursing education suggests gradually introducing students to complex and multi-contextual clinical scenarios through the utilization of case studies and problem-based learning activities, with the intention to transition nursing students into autonomous learners and well-prepared practitioners at the culmination of a nursing program. Exemplar curricular activities are suggested to potentiate student development of a transferable problem solving skill set and a flexible knowledge base to better prepare students for practice in future novel clinical experiences, which is a mutual goal for both educators and students.

What are the key contextual factors when preparing for successful implementation of assistive living technology in primary elderly care? A case study from Norway.

Science.gov (United States)

Gjestsen, Martha Therese; Wiig, Siri; Testad, Ingelin

2017-09-07

To identify contextual factors at different organisational levels to guide the implementation of an assistive living technology intervention in Norwegian primary home care. A single embedded case study design was carried out in an urban municipality in Western Norway to get an overview of key contextual factors from the municipality's perspective. The data collection was based on a triangulation of methods involving document analysis, semi-structured individual interviews and focus group interviews to get a broad insight when preparing for an intervention. Data were collected on three levels of the healthcare system: (1) national policy documents and regulations (macro), (2) five individual interviews with senior managers and municipal strategy documents (meso) and (3) two focus group interviews with nurses and nurse managers in direct patient care (micro). The Model for Understanding Success in Quality framework was used as a guide in the data analysis. The main contextual factors identified were external motivators and project sponsorship (macro level); leadership, workforce focus and maturity (meso level);and motivation to change and maturity (micro level). Strategies developed in policy documents affected upper management in the municipality, but healthcare personnel at the micro level were not so familiar with strategies and emphasis on assistive living technologies. Healthcare personnel in our study were motivated to use technological solutions, but lack of data infrastructure and resource availability hindered this. Aligning interests across multiple stakeholders remain a challenge when planning for an assistive living technology intervention in primary care. In the studied municipality, integration of technological solutions into healthcare services was more a vision than a reality because of a low level of organisational readiness. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No

Theoretical pluralism in psychoanalytic case studies.

Science.gov (United States)

Willemsen, Jochem; Cornelis, Shana; Geerardyn, Filip M; Desmet, Mattias; Meganck, Reitske; Inslegers, Ruth; Cauwe, Joachim M B D

2015-01-01

The aim of this study is to provide an overview of the scientific activity of different psychoanalytic schools of thought in terms of the content and production of case studies published on ISI Web of Knowledge. Between March 2013 and November 2013, we contacted all case study authors included in the online archive of psychoanalytic and psychodynamic case studies (www.singlecasearchive.com) to inquire about their psychoanalytic orientation during their work with the patient. The response rate for this study was 45%. It appears that the two oldest psychoanalytic schools, Object-relations psychoanalysis and Ego psychology or "Classical psychoanalysis" dominate the literature of published case studies. However, most authors stated that they feel attached to two or more psychoanalytic schools of thought. This confirms that the theoretical pluralism in psychoanalysis stretches to the field of single case studies. The single case studies of each psychoanalytic school are described separately in terms of methodology, patient, therapist, or treatment features. We conclude that published case studies features are fairly similar across different psychoanalytic schools. The results of this study are not representative of all psychoanalytic schools, as some do not publish their work in ISI ranked journals.

Theoretical pluralism in psychoanalytic case studies

Science.gov (United States)

Willemsen, Jochem; Cornelis, Shana; Geerardyn, Filip M.; Desmet, Mattias; Meganck, Reitske; Inslegers, Ruth; Cauwe, Joachim M. B. D.

2015-01-01

The aim of this study is to provide an overview of the scientific activity of different psychoanalytic schools of thought in terms of the content and production of case studies published on ISI Web of Knowledge. Between March 2013 and November 2013, we contacted all case study authors included in the online archive of psychoanalytic and psychodynamic case studies (www.singlecasearchive.com) to inquire about their psychoanalytic orientation during their work with the patient. The response rate for this study was 45%. It appears that the two oldest psychoanalytic schools, Object-relations psychoanalysis and Ego psychology or “Classical psychoanalysis” dominate the literature of published case studies. However, most authors stated that they feel attached to two or more psychoanalytic schools of thought. This confirms that the theoretical pluralism in psychoanalysis stretches to the field of single case studies. The single case studies of each psychoanalytic school are described separately in terms of methodology, patient, therapist, or treatment features. We conclude that published case studies features are fairly similar across different psychoanalytic schools. The results of this study are not representative of all psychoanalytic schools, as some do not publish their work in ISI ranked journals. PMID:26483725

Novel technology to prepare oral formulations for preclinical safety studies.

Science.gov (United States)

Niwa, Toshiyuki; Hashimoto, Naofumi

2008-02-28

A novel method to prepare oral formulations, normally suspended dosage form, for preclinical safety studies in animals has been developed using a rotation/revolution mixer. Small hard balls made of zirconia were added to the mixing process to evaluate effectiveness in making a high quality suspension. The driving with balls loaded in the cylindrical container (vessel) of the mixer was quite efficient in dispersing and milling the particles of the active pharmaceutical ingredient (API) in an aqueous medium. The API powder and a small amount of oral aqueous medium (vehicle) were successfully mixed by the spinning motion of the balls in the vessel as though the paste-like suspension was kneaded with a mortar and pestle. It was found that the milled suspension with the mean size of 10-20microm could be prepared, in addition finer milling of less than 10microm could be achieved by selecting the material of vessel. Optimum driving conditions including mixing time, size and quantity of balls, and the standard operational procedure was established using compounds varying in physicochemical properties. The particle size and quantitative analysis by HPLC showed that the resultant suspension was well-milled and highly homogeneous with the nearly intended concentration of API. The proposed method established by this experiment could be applied to the actual safety studies in the real preparation scale of oral suspension.

Preparing perservice teachers to teach elementary school science

Science.gov (United States)

Lewis, Amy D.

The development of scientifically literate citizens begins in the elementary school. Yet elementary school teachers are ill prepared to teach science (Trygstad, Smith, Banilower, Nelson, & Horizon Research, Inc., 2013). The research base on teacher preparation finds that programs designed to prepare elementary teachers are inadequate in providing both the content knowledge and pedagogical content knowledge necessary to teach science effectively (Baumgartner, 2010; Bodzin & Beerer, 2003; Bulunuz & Jarrett 2009). This mixed methods study examined what happened when a science methods course was interactively co-taught by an expert in elementary teaching methods and a physics expert. This study also aimed to discover what aspects of the curriculum pre-service teachers (PSTs) said helped them in developing their understanding of science content and scientific reasoning, and how to implement inquiry practices to teach science. A nested case study of three PSTs provided descriptive portraits of student experiences in the class. A whole class case analysis was used to examine what PSTs learned in terms of science, scientific reasoning skills, and pedagogical content knowledge (PCK) from their experiences in the course. It was found that students often conflated science content with the experiences they had in learning the content. Although PSTs felt the interactive co-teaching model effectively created a balance between theory and practice, it was their experiences doing science--conducting physical experiments, developing and discussing scientific models, and the use of inquiry-based instruction--that they credited for their learning. Even with careful curriculum planning, and a course purposely designed to bridge the theory to practice gap, this study found one semester-long methods course to be insufficient in providing the vast content knowledge and PCK elementary school science teachers need.

Experimental studies on absorbed dose in radiation sterilization of pharmaceutical preparation

International Nuclear Information System (INIS)

Ohnishi, Tokuhiro; Okamoto, Shinichi; Kimura, Syojiro; Taimatsu, Meiko.

1991-01-01

For radiation sterilization, it is necessary to decide the irradiation conditions considering a balance between sterilization efficiency and chemical changes of samples by irradiation. These effects may be estimated by the product of two factors (D 10 and G value) and absorbed dose. In this work, it has been found experimentally by using Fricke dosimeter that the absorbed doses of the samples in vessels different in size, material, volume, etc. are not equal under the same gamma-ray irradiation condition. The correction factor from exposure to absorbed dose was estimated to be 6-7% for organic vessels (a polyethylene bag and a polystyrene vial) and a 20-ml glass vial, 9% for a 10-ml glass vial, and 10% for the 5-ml glass vial. These values of the correction factor were confirmed by using the changes of enzymic activity of saccharated powder pepsin preparation. In the cases of using organic vessels and the 10-ml glass vial, G-values for the change of the enzymic activity were calculated to show similar values in the range from 0.79 to 0.82. However, in the case of a small glass vial (5-ml), the value was 0.93. (author)

Reconceptualizing Elementary Teacher Preparation : A case for informal science education

NARCIS (Netherlands)

Avraamidou, Lucy

2015-01-01

The purpose of this case study was to explore the ways in which 3 different informal science experiences in the context of an elementary methods course influenced a group of prospective elementary teachers' ideas about science teaching and learning as well as their understandings about the role of

Preparation and Characterization of Hydrous Zirconium Oxide Formed by Homogeneous Precipitation

Directory of Open Access Journals (Sweden)

Silva G.L.J.P. da

2002-01-01

Full Text Available This paper reports on the preparation, characterization and study of the ion exchange behavior of hydrous zirconium oxides formed by homogeneous precipitation from zirconium oxychloride. The precipitants used were obtained by thermal decomposition of urea, sodium nitrite or ammonium carbonate. Seven compounds were prepared and characterized by thermal analysis, X-ray diffractometry and by surface area measurements. Amorphous forms were obtained in each case, a result that agrees with those obtained by conventional gel precipitation methodology. All these materials present surface area values of >148 m².g-1, determined after heat treatment at 50 °C. The ion exchange behavior of each hydrous zirconium oxide prepared was studied using K+ as the exchanged species and the results compared with those obtained for hydrous zirconium oxide originally precipitated by the sol gel method.

New classification of operators' human errors at overseas nuclear power plants and preparation of easy-to-use case sheets

International Nuclear Information System (INIS)

Takagawa, Kenichi

2004-01-01

At nuclear power plants, plant operators examine other human error cases, including those that occurred at other plants, so that they can learn from such experiences and avoid making similar errors again. Although there is little data available on errors made at domestic plants, nuclear operators in foreign countries are reporting even minor irregularities and signs of faults, and a large amount of data on human errors at overseas plants could be collected and examined. However, these overseas data have not been used effectively because most of them are poorly organized or not properly classified and are often hard to understand. Accordingly, we carried out a study on the cases of human errors at overseas power plants in order to help plant personnel clearly understand overseas experiences and avoid repeating similar errors, The study produced the following results, which were put to use at nuclear power plants and other facilities. (1) ''One-Point-Advice'' refers to a practice where a leader gives pieces of advice to his team of operators in order to prevent human errors before starting work. Based on this practice and those used in the aviation industry, we have developed a new method of classifying human errors that consists of four basic actions and three applied actions. (2) We used this new classification method to classify human errors made by operators at overseas nuclear power plants. The results show that the most frequent errors caused not by operators themselves but due to insufficient team monitoring, for which superiors and/or their colleagues were responsible. We therefore analyzed and classified possible factors contributing to insufficient team monitoring, and demonstrated that the frequent errors have also occurred at domestic power plants. (3) Using the new classification formula, we prepared a human error case sheets that is easy for plant personnel to understand. The sheets are designed to make data more understandable and easier to remember

comparative study between different oxidizing agents to prepare radioiodinated alpha fetoprotein (AFP)

International Nuclear Information System (INIS)

El-Kolaly, M.T.; Ragab, M.T.; El-Mohty, A.A.; Sallam, K.M.; Arief, M.H.

2004-01-01

the aim of the present study was designed to prepare four different preparation of radioiodinated alpha fetoprotein ( 125 I-Afp) using different oxidizing agents. the oxidizing agents were chloramine-T (Ch-T), lodogen (1,3,4 , 6-tetrachloro 3 α ,6α diphenyl glycoluril ), N-bromosuccinimide (NBS) and lactoperoxidase (LPS). the product was purified by gel filtration using sephadex G-25. then the tracers obtained were tested by radioimmunoassay (RIA) technique. different affecting factors were extensively studied including reaction time, reaction volume, oxidizing agent content and Ph of reaction. it was found that the Ch-T method is the best one

451 Case studies Cardiac

African Journals Online (AJOL)

Marinda

Case Studies. 29 ... A case of a 26-year-old ASA I physical status male undergoing septoplasty had an abrupt ... myocardial infarction, severe hypertensive crisis, cerebral .... or no formal management is required in an ASA I patient.8 One.

Preparation Of Porous And Dense Bodies From Hydroxyapatite Powders Prepared Via Sol-Gel Technique

International Nuclear Information System (INIS)

Sopyan, Lis

2001-01-01

Hydroxyapatite (HA) ceramics is clinically proven and, thus, a reliable material for medical applications, that is, for use in dental and orthopedical surgery to fill cavities in bones. In this paper, we report a preliminary study on development of HA porous and dense materials manufactured using fine HA powders prepared via a sol-gel technique. In the preparation of HA porous bodies, slurries of the as-prepared powder were prepared with an adjusted loading ofHA, using Duramax of 0-3021 type as dispersant. After soaking cellulosic sponges into the slurry, the sponges were dried and then subjected to heat-treatment at 600 o C, followed by sintering at 1250 o C for I h. The apparent density of the porous bodies is 1.290 g/cm 3 , with a porosity of 59%. The sintering shrinkage is about 20% (in respect of dimension) and 44 % (in respect of volume). Morphological evaluation of the porous bodies showed that the samples contained macropores of 1-2 mm diameter and micropores of 1-2 μm diameter. The measurement of mechanical strength provided 1.31 ± 0.30 MPa. Subsequently, dense samples were prepared from the as-prepared powder. In this case, the powder was mixed with poly(vinyl alcohol) and distilled water to make a slurry. The mixture was mixed using Zirconia balls as the crusher for 2h. The suspension was then spray-dried, and well-dispersed powder was obtained. The powder was compressed uniaxially using cold pressing technique at 800 kglcm2 and the pellets obtained were sintered in air at : 250 o C for I h. The sintered dense bodies have apparent density of 2.855 g/cm 3 , with a 10% porosity. The flexural strength of the dense bodies measured on the specimens of riimension 2 mm x 2.5 mm gave rise to the considerable value of 57.7 MPa

Case Studies of Mental Health in General practice(28)---HIV and Mood Disturbance

Institute of Scientific and Technical Information of China (English)

Fiona Judd; Leon Piterman; Grant Blashki; Hui Yang

2014-01-01

The Journal presents the Column of Case Studies of Mental Health in General Practice;with aca-demic support from Australian eXperts in general practice,psychology and psychiatry from Monash University and the University of Mel-bourne. The Columnˊs purpose is to respond to the increasing need for the development of mental health services in China. Through study and analysis of mental health cases,we hope to improve understanding of mental illnesses in Chinese primary health settings,and to build capaci-ty amongst community health professionals in managing mental illnesses and psychological problems in general practice. A patient - centred whole - person approach in general practice is the best way to maintain and improve the physical and mental health of residents. Our hope is that these case studies will lead the new wave of general practice and mental health service development both in practice and research. A num-ber of Australian eXperts from the disciplines of general practice,mental health and psychiatry will contribute to the Column. Professor Blash-ki,Professor Judd and Professor Piterman are authors of the teXt General Practice Psychiatry;the Chinese version of the book to be published in 2014. The Journal cases are helping to prepare for the translation and publication of a Chinese version of the book in China. We believe Chi-nese mental health in primary health care will reach new heights under this international cooperation.

Home food preparation practices, experiences and perceptions: A qualitative interview study with photo-elicitation

OpenAIRE

Mills, Susanna; White, Martin; Wrieden, Wendy; Brown, Heather; Stead, Martine; Adams, Jean

2017-01-01

Food-related choices have an important impact on health. Food preparation methods may be linked to diet and health benefits. However, the factors influencing people's food choices, and how they are shaped by food preparation experiences, are still not fully understood. We aimed to study home food preparation practices, experiences and perceptions amongst adults in North East England. A matrix was used to purposively sample participants with diverse socio-demographic characteristics. Participa...

Cost Effectiveness of Screening Colonoscopy Depends on Adequate Bowel Preparation Rates - A Modeling Study.

Directory of Open Access Journals (Sweden)

James Kingsley

Full Text Available Inadequate bowel preparation during screening colonoscopy necessitates repeating colonoscopy. Studies suggest inadequate bowel preparation rates of 20-60%. This increases the cost of colonoscopy for our society.The aim of this study is to determine the impact of inadequate bowel preparation rate on the cost effectiveness of colonoscopy compared to other screening strategies for colorectal cancer (CRC.A microsimulation model of CRC screening strategies for the general population at average risk for CRC. The strategies include fecal immunochemistry test (FIT every year, colonoscopy every ten years, sigmoidoscopy every five years, or stool DNA test every 3 years. The screening could be performed at private practice offices, outpatient hospitals, and ambulatory surgical centers.At the current assumed inadequate bowel preparation rate of 25%, the cost of colonoscopy as a screening strategy is above society's willingness to pay (<$50,000/QALY. Threshold analysis demonstrated that an inadequate bowel preparation rate of 13% or less is necessary before colonoscopy is considered more cost effective than FIT. At inadequate bowel preparation rates of 25%, colonoscopy is still more cost effective compared to sigmoidoscopy and stool DNA test. Sensitivity analysis of all inputs adjusted by ±10% showed incremental cost effectiveness ratio values were influenced most by the specificity, adherence, and sensitivity of FIT and colonoscopy.Screening colonoscopy is not a cost effective strategy when compared with fecal immunochemical test, as long as the inadequate bowel preparation rate is greater than 13%.

A case-control study of Yersinia enterocolitica infections in Auckland.

Science.gov (United States)

Satterthwaite, P; Pritchard, K; Floyd, D; Law, B

1999-10-01

To identify major risk factors for Yersinia enterocolitica (YE) and identify measures to reduce YE infections. A prospective case control study, group age matched, using 186 cases of YE identified by community pathology laboratories and 379 randomly selected controls. Conducted between April 1995 and June 1996 in Auckland, New Zealand. Face-to-face interviews used a standardised questionnaire examining exposures to factors potentially associated with YE infections including untreated water, unreticulated sewerage, consumption of selected foods, selected food handling practices and socio-demographic factors. Multivariate logistic regression was used to calculate adjusted odds ratios for the potential risk factors. Population attributable risk (PAR) was calculated for significant exposures. Having more than two people living in the home was more common among cases than controls (OR = 2.2). Town supply water (OR = 0.2), reticulated sewerage (OR = 0.34) and looking after a young child (OR = 0.51) were significantly less common. Of the meats, only pork (OR = 1.34) had a higher consumption rate, while bacon (OR = 0.75) and smallgoods (OR = 0.73) were consumed less frequently by cases than controls. Eating food from a sandwich bar was more frequent among cases (OR = 1.18). Fruit and vegetable consumption was marginally less (OR = 0.98). The population attributable risk of these factors was 0.89, implying that 89% of YE would be eliminated if adverse exposures were removed. The risk of YE illness is increased by contact with untreated water, unreticulated sewerage and consumption of pork. Investigation of non-town water supply, informal sewerage systems and methods of preparation and consumption of pork are recommended to determine how YE enters the human food chain.

Preparation and study of properties of dispersed graphene oxide

Directory of Open Access Journals (Sweden)

Evgeniya Seliverstova

2015-09-01

Full Text Available Ability of graphene oxide to form stable dispersion in organic solvents was studied in this work. As it was shown, sonication of graphene leads to the decreas of the particle size. Stability of prepared graphene dispersions was studied upon measurements of distribution of number of the particles via size and change of optical density of the solutions with time. It was found that graphene oxide forms a more stable dispersion in tetrahydrofuran and dimethylformamide than in chloroform and acetone.

Differences in sensitivity of rat mesenteric small arteries to agonists when studied as ring preparations or as cannulated preparations

NARCIS (Netherlands)

Buus, N. H.; VanBavel, E.; Mulvany, M. J.

1994-01-01

1. Pharmacological experiments on vascular tissue are normally performed on isometric ring or strip preparations. The aim of this study was to compare the isometric characteristics with the characteristics obtained if vessels were examined under the more physiologically appropriate isobaric

Study of the influence of homologous serum globulin preparations on the intestinal automicroflora in irradiated mice

Energy Technology Data Exchange (ETDEWEB)

Pinegin, B.V.; Klemparskaya, N.N.; Mal' tsev, V.N.; Korshunov, G.A.; Shal' nova, G.A.; Kuz' mina, T.D.

1984-09-01

In spite of considerable experience of practical use of serum globulin preparations, their effect on automicroflora wasn't studied. The favorable effect of therapeutic injection of homologous serum globulin preparations on automicroflora of small and large intestine of mices was established for the model of acute radiation sickness caused by /sup 60/Co irradiation with 700 R dose. The effect of injecting two types of globulin preparations was studied: ones prepared of blood of intact and hemostimulated mices (to increase the content of normal antitissue antibodies in the serum). Besides the general globulin fraction isolated by ammonium sulfate precipitation a study was made on the effect of purified IgG and IgM preparations. Threefold subcutaneous or intraperitoneal globulin in ection of 1 ..mu..g dose in a mice prevented after 2, 24, 48 h after irradiation the development of bacteriosis, typical for radiation injury - decreased accumulation of putrefactive bacteria and reduced the suppression of lactobacilli content. Globulin preparations and fractions of hemostimulated mice serum, enriched by normal antitissue antibodies are the most effective ones.

PREPARATION, SPECTROSCOPIC STUDIES AND X-RAY ...

African Journals Online (AJOL)

Molar conductance measurements in dmf indicate 1:3 electrolytes in all cases. Magnetic moment values are close proximity of the Van Vleck values. IR studies suggest the coordination of the ligand is through the azomethine, the phenolic oxygen atom and the carbonyl oxygen of the hydrazonic moiety. The nitrate ion is also ...

Treatment of hematomas after anterior cervical spine surgery: A retrospective study of 15 cases.

Science.gov (United States)

Miao, Weiliang; Ma, Xiaojun; Liang, Deyong; Sun, Yu

2018-05-04

Postoperative hematoma is a rare and dangerous complication of cervical spine surgery. The aim of this study was to investigate the incidence and related factors of postoperative hematoma, and to report on 15 cases at our institution over a 6-year period. Fifteen cases of postoperative hematoma were retrospectively identified. We investigated their neurological outcomes, characteristics, and surgical data, and identified risk factors associated with postoperative (PO) hematoma. Patients with hematoma were compared to those with no hematoma, in order to identify risk factors. Retropharyngeal hematomas developed in seven cases and epidural hematomas in eight. The total incidence of postoperative hematoma was 1.2%: 0.5% retropharyngeal hematomas and 0.6% spinal epidural hematomas. At time of onset, the severity of paralysis was assessed as grade B in one case, grade C in six cases, and grade D in eight cases. Risk factors for PO hematoma were: (1) presence of ossification of the posterior longitudinal ligament (OPLL) (Phematoma group and non-hematoma group (P>0.05). Precise preoperative preparation and systematic evaluation are central to successful management of PO hematoma after anterior cervical surgery. Risk factors for PO hematoma include multilevel decompression, OPLL, higher BMI, and longer operation time. Copyright © 2018 Elsevier Masson SAS. All rights reserved.

Experimental design: Case studies of diagnostics optimization for W7-X

International Nuclear Information System (INIS)

Dreier, H.; Dinklage, A.; Fischer, R.; Hartfuss, H.-J.; Hirsch, M.; Kornejew, P.; Pasch, E.; Turkin, Yu.

2005-01-01

The preparation of diagnostics for Wendelstein 7-X is accompanied by diagnostics simulations and optimization. Starting from the physical objectives, the design of diagnostics should incorporate predictive modelling (e.g. transport modelling) and simulations of respective measurements. Although technical constraints are governing design considerations, it appears that several design parameters of different diagnostics can be optimized. However, a general formulation for fusion diagnostics design in terms of optimization is lacking. In this paper, first case studies of Bayesian experimental design aiming at applications on W7-X diagnostics preparation are presented. The information gain of a measurement is formulated as a utility function which is expressed in terms of the Kullback-Leibler divergence. Then, the expected range of data is to be included and the resulting expected utility represents the objective for optimization. Bayesian probability theory gives a framework allowing us for an appropriate formulation of the design problem in terms of probability distribution functions. Results are obtained for the information gain from interferometry and for the design of polychromators for Thomson scattering. For interferometry, studies of the choice of line-of-sights for optimum signal and for the reproduction of gradient positions are presented for circular, elliptical and W7-X geometries. For Thomson scattering, the design of filter transmissions for density and temperature measurements are discussed. (author)

A Study on Foodborne Bacterial Cross-contamination During Fresh Chicken Preparation

Directory of Open Access Journals (Sweden)

Shamma Ebrahim AlZaabi

2017-12-01

Full Text Available Background: Cross-contamination of foodborne pathogens from undercooked poultry meat to ready-to-eat food has been shown to be responsible for a number of foodborne disease outbreaks. Various studies have indicated that bacterial cross-contamination occurs during food preparation where bacteria present on food contact other surfaces and cause illness. Objectives: This study evaluated the ability of bacteria to survive and cross-contaminate other foods during the preparation of fresh chicken. Salmonella spp. cross-contamination from chicken to cucumber and utensils under various food handling scenarios was determined. Methods: Two scenarios were tested: in scenario 1, cutting board and knife used for cutting chicken without washing step were sampled. In scenario 2, cutting board and knife was washed with tap water separately after cutting chicken, and subsequently used for cutting cucumber. In scenario 1, chicken, cutting board, knife, and hands were sampled, and in scenario 2, cucumber was tested. Fluorescent in situ hybridization (FISH method, using published Salmonella specific gene probes was used for Salmonella detection in samples taken from cross-contamination scenarios. A culture-based detection by Hektoen enteric agar was used for the confirmation of Salmonella species. Results: All the samples analyzed were found to be positive for Salmonella spp. with different contamination levels. These results were further confirmed by culture based method. In scenario 1, Salmonella spp. was detected by Sal-1 and Salm-63 oligonucleotide probes in all four samples (chicken, cutting board, knife and hands. A high contamination level was observed in chicken samples in comparison to samples collected from cutting board, knife and hands. In scenario 2, Salmonella spp. was detected by Sal-1 and Salm-63 oligonucleotide probes in the cucumber with very low contamination level. Salmonella Enterica was also detected by Sal-3 and Sapath-3 in both scenarios but

CASE STUDY

African Journals Online (AJOL)

2011-06-02

Jun 2, 2011 ... immunosuppression associated with HIV/AIDS puts them at a higher risk of developing oesophageal cancer. 47. CASE STUDY. A 49-year-old man was diagnosed as HIV infected, with a CD4 count of 60 cells/µl. He was started on an antiretroviral treatment regimen comprising zidovudine, lamivudine and ...

Preparation and biological studies of 68Ga-DOTA-alendronate

Directory of Open Access Journals (Sweden)

Ashraf Fakhari

2016-07-01

Full Text Available Objective(s: In line with previous research on the development of conjugated bisphosphonate ligands as new bone-avid agents, in this study, DOTA conjugated alendronate (DOTA-ALN was synthesized and evaluated after labeling with gallium-68 (68Ga.Methods: DOTA-ALN was synthesized and characterized, followed by 68Ga-DOTA-ALN preparation, using DOTA-ALN and 68GaCl3 (pH: 4-5 at 92-95°C for 10 min. Stability tests, hydroxyapatite assay, partition coefficient calculation,biodistribution studies, and imaging were performed on the developed agent in normal rats.Results: The complex was prepared with high radiochemical purity (>99% as depicted by radio thin-layer chromatography; specific activity: 310-320GBq/mmol after solid phase purification and was stabilized for up to 90 min with a logP value of -2.91. Maximum ligand binding (65% was observed in the presence of 50 mg of hydroxyapatite; a major portion of the activity was excreted through the kidneys. With the exception of excretory organs, gastrointestinal tract organs, including the liver, intestine, and colon, showed significant uptake; however, the bone uptake was low (

The Hathaway Scholarship and Academic Preparation: A Study of Perceptions of Academic Preparation and Academic Success

Science.gov (United States)

Aagard, Tammy Lindsay

2010-01-01

With the implementation of the Hathaway scholarship in the state of Wyoming, questions arose regarding the effectiveness of a prescribed set of high school courses (the Success Curriculum) in preparing students for success in college. This research sought to determine the perceptions of academic preparation of students who earned the Hathaway…

Casing study

Energy Technology Data Exchange (ETDEWEB)

Roche, P.

2000-12-01

An unorthodox method of casing drilling used by Tesco Corporation at a gas well in Wyoming to drill deeper using casings as drillpipe is discussed. The process involves either rotating the casing as drill string or using a downhole mud motor to rotate the bit. In this instance, the surface hole and the production hole were casing-drilled to a record 8,312 feet by rotating the casing. The 8 1/2-inch surface hole was drilled with 7-inch casing to 1,200 feet using a Tesco underreamer and a polycrystalline pilot bit; drilling and cementing was completed in 12 1/2 hours. The 6 1/4-inch production hole was drilled with 4 1/2-inch casing and the bottomhole assembly was retrieved after 191 hours rotating. This case was the first in which the entire well was casing-drilled from surface to TD. Penetration rate compared favorably with conventional methods: 12 1/2 hours for casing-drilling to 18.9 hours for conventional drilling, despite the fact that the casing-drilling technology is still in its infancy. It is suggested that casing-drilling has the potential to eliminate the need for the drillpipe entirely. If these expectations were to be realised, casing-drilling could be one of the most radical drilling changes in the history of the oil and gas industry. 1 photo.

Studies on the preparation of low-carrier Se-73,75 tracers for in vivo examinations

International Nuclear Information System (INIS)

Helfer, Andreas

2013-01-01

With the growing importance of positron emission tomography (PET) for in vivo imaging in diagnostic medicine there is great interest of developing new labelling methods for the positron emitter selenium-73. As attractive application an examination of a no-carrier-added (n.c.a.) preparation of the analogous tracer Sulindac Selenid and of the selenium containing compound Ebselen was examined with 73,75 Se. First of all a labelling strategy for Sulindac Selenid based on a protected precursor was developed. This precursor should further be transformed into the corresponding standard compound for chomatographic identification of the n.c.a. product. This, however, was not possible. An alternative synthesis method also did not result in a product. Thus, a radioactive labelling in case of Sulindac Selenid was not indicated in spite of a successful synthesis of a precursor. The preparation of Ebselen was performed as earlier described by a sequential one-pot synthesis with a yield of 46 %. An adaption of the reaction parameters to a radiosynthesis with 75 Se failed on the n.c.a. state and also after adding carrier to the reaction mixture. The desired product could, however, be prepared in a copper catalysed one-pot radiosynthesis for the first time under carrier-added conditions. Here, optimized conditions resulted in radiochemical yields of 60 ± 18 %. A no-carrier-added product could finally be achieved using sulphur as nonisotopic carrier in the reaction mixture. After optimisation of reaction parameters n.c.a. [ 75 Se]Ebselen could be synthesized with radiochemical yields of 55 ± 7 % within 4 h. Furthermore the desired product could be separated by RHPL-chromatography from its co-produced sulfur-analogue. After transferring the conditions to radiosyntheses with the positron emitter 73 Se, n.c.a. [ 73 Se]Ebselen could be achieved with a radiochemical yield of 22 ± 1 % and can now be used as a potential radiotracer in preclinical evaluation studies with respect to

Micronucleus Assay in Exfoliated Buccal Epithelial Cells Using Liquid Based Cytology Preparations in Building Construction Workers.

Science.gov (United States)

Arul, P; Smitha, Shetty; Masilamani, Suresh; Akshatha, C

2018-01-01

Cytogenetic damage in exfoliated buccal epithelial cells due to environmental and occupational exposure is often monitored by micronucleus (MN) assay using liquid based cytology (LBC) preparations. This study was performed to evaluate MN in exfoliated buccal epithelial cells of building construction workers using LBC preparations. LBC preparations of exfoliated buccal epithelial cells from 100 subjects [50 building construction workers (cases) and 50 administrative staffs (controls)] was evaluated by May-Grunwald Giemsa, Hematoxylin and Eosin and Papanicolaou stains. Student's t test was used for statistical analysis and a P value of 5 years) and smokers and non-smokers of cases (P=0.001). However, there were meaningful differences regarding mean frequencies of MN between smokers, non-smokers, those with alcohol consumption or not in cases and controls using various stains (P=0.001). There was an increased risk of cytogenetic damage in building construction workers. However, evaluation of MN of exfoliated buccal epithelial cells in building construction workers serve as a minimally invasive biomarker for cytogenetic damage. LBC preparations can be applied for MN assay as it improves the quality of smears and cell morphology, decreases the confounding factors and reduces false positive results.

Reconceptualizing Elementary Teacher Preparation: A Case for Informal Science Education

Science.gov (United States)

Avraamidou, Lucy

2015-01-01

The purpose of this case study was to explore the ways in which 3 different informal science experiences in the context of an elementary methods course influenced a group of prospective elementary teachers' ideas about science teaching and learning as well as their understandings about the role of informal science environments to teaching and…

Preparation, characterization, and in vitro release study of albendazole-encapsulated nanosize liposomes

Science.gov (United States)

Panwar, Preety; Pandey, Bhumika; Lakhera, P C; Singh, K P

2010-01-01

The purpose of the present study was to formulate effective and controlled release albendazole liposomal formulations. Albendazole, a hydrophobic drug used for the treatment of hydatid cysts, was encapsulated in nanosize liposomes. Rapid evaporation method was used for the preparation of albendazole-encapsulated conventional and PEGylated liposomes consisting of egg phosphatidylcholine (PC) and cholesterol (CH) in the molar ratios of (6:4) and PC:CH: polyethylene glycol (PEG) (5:4:1), respectively. In this study, PEGylated and conventional liposomes containing albendazole were prepared and their characteristics, such as particle size, encapsulation efficiency, and in vitro drug release were investigated. The drug encapsulation efficiency of PEGylated and conventional liposomes was 81% and 72%, respectively. The biophysical characterization of both conventional and PEG-coated liposomes were done by transmission electron microscopy and UV-vis spectrophotometry. Efforts were made to study in vitro release of albendazole. The drug release rate showed decrease in albendazole release in descending order: free albendazole, albendazole-loaded conventional liposomes, and least with albendazole-loaded PEG-liposomes. Biologically relevant vesicles were prepared and in vitro release of liposome-entrapped albendazole was determined. PMID:20309396

MRI case studies

International Nuclear Information System (INIS)

Huggett, S.; Barber, J.

1989-01-01

Three case studies are presented to show the value of magnetic resonance imaging used in conjunction with other imaging techniques. In each case MRI proved a vital diagnostic tool and superior to CT in showing firstly the haematoma in a patient with aphasia and right-sided weakness, secondly the size of the disc herniation in a patient with severe leg and ankle pains and thirdly the existence of a metastatic lesion in a patient with a previous history of breast cancer. 11 figs

Shigellosis Outbreak in Al Batinah South Governorate, Oman; Case-control study

Directory of Open Access Journals (Sweden)

Idris Abaidani

2015-08-01

Full Text Available Objectives: An outbreak of acute gastroenteritis due to Shigella flexneri occurred in August 2012 in the catchment area of the Wadi Sahtan Health Center in Rustaq, Al Batinah South Governorate, Oman. The aim of this study was to discover possible causes of this outbreak in the villages of Fassa, Rogh and Amk and to measure the risk of exposure among cases and controls. Methods: A case-control study was conducted in September 2012 in Fassa, Rogh and Amk. All households in the three villages were interviewed. Case and control households were compared to determine possible exposure avenues, including place of residence, source of drinking water, hand hygiene levels and practices related to drinking water, food preparation and environmental sanitation. Results: Residing in Fassa (P <0.0001; odds ratio [OR] = 4.86, 95% confidence interval [CI] = 2.22–10.63 and average hand hygiene practices (P = 0.008; OR = 13.97, 95% CI = 1.58–123.36 were associated with an increased risk of contracting shigellosis. No significant differences were found with regards to the other exposure avenues. Conclusion: This was the first study conducted in Oman regarding an outbreak of shigellosis in a community setting. The only variables that significantly impacted the risk of acute gastroenteritis were residing in Fassa and average hand hygiene practices. The source of the outbreak could not be identified. However, septic tank sanitation and water and food consumption practices were not satisfactory in the studied villages. These need to be addressed to prevent similar outbreaks of acute gastroenteritis in this region in the future.

22 CFR 96.48 - Preparation and training of prospective adoptive parent(s) in incoming cases.

Science.gov (United States)

2010-04-01

... child resides; and (3) Any other medical, social, background, birth history, educational data... least ten hours (independent of the home study) of preparation and training, as described in paragraphs... and children with a history of multiple caregivers may experience, before and after their adoption; (6...

Oromucosal film preparations: classification and characterization methods.

Science.gov (United States)

Preis, Maren; Woertz, Christina; Kleinebudde, Peter; Breitkreutz, Jörg

2013-09-01

Recently, the regulatory authorities have enlarged the variety of 'oromucosal preparations' by buccal films and orodispersible films. Various film preparations have entered the market and pharmacopoeias. Due to the novelty of the official monographs, no standardized characterization methods and quality specifications are included. This review reports the methods of choice to characterize oromucosal film preparations with respect to biorelevant characterization and quality control. Commonly used dissolution tests for other dosage forms are not transferable for films in all cases. Alternatives and guidance on decision, which methods are favorable for film preparations are discussed. Furthermore, issues about requirements for film dosage forms are reflected. Oromucosal film preparations offer a wide spectrum of opportunities. There are a lot of suggestions in the literature on how to control the quality of these innovative products, but no standardized tests are available. Regulatory authorities need to define the standards and quality requirements more precisely.

Studies concerning the preparation of the 153Sm complex with EDTMP (ethylenediaminetetra methylenephosphonic acid) and other 153Sm complexes with other phosphonates, at room temperature

International Nuclear Information System (INIS)

Gasiglia, Haroldo Taurian

2000-01-01

This work presents a study on the preparation of the complexes 1 53S m - EDTMP, 153 Sm - HEDP, 153 Sm - NTMP, 153 Sm - DTPMP and 153 Sm - HDTMP at room temperature. The preparation of the complex 153 Sm - HDTMP, under heating (70 - 72 deg C), was also studied. Several factors affecting the 153 Sm - EDTMP complexing yields were studied, due to its importance for use in Nuclear Medicine. These factors were: the molar ratio [ligand] / [metal], the ligand concentration and the incubation time of the mixture ligand-metal. The preparation of this complex, in low molar ratios, was also investigated. A study of the 153 Sm - EDTMP concerning the 'in vitro' stability, when this complex was prepared in low radioactive concentrations was performed. A study on the temperature influence on its degradation, when this complex was obtained in higher radioactive concentrations, was also performed. The preparation of the complexes 153 Sm - HEDP, 153 Sm - NTMP, 153 Sm - DTPMP and 153 Sm - HDTMP was investigated by preparing the complexes in two situations: high molar ratio and ligand concentration and low molar ratio and ligand concentration. The 'in vitro' stability of each complex, obtained in low radioactive concentration was studied. In the specific case of the complex 153 Sm - HDTMP, its biological distribution in mice was performed. All the complexes were investigated by high performance liquid chromatography (HPLC) and its complexing yields were determined by other three chromatographic processes: ionic exchange, thin layer chromatography (TLC - SG) and paper chromatography. The chromatographic processes were performed by association with specific radiochemical techniques. This work also presents a comparative study on the chromatograms obtained by thin layer chromatography (TLC - SG) and paper chromatography, when evaluated by the technique of cutting the strips into pieces and the chromatograms performed directly on a radiochromatography. The shape of the chromatograms and R

Qualitative Case Study Guidelines

Science.gov (United States)

2013-11-01

Introduction to Sociological Methods. 2nd ed. New York, McGraw-Hill 14. Denzin , N. K. and Lincoln , Y. S. (2011) The SAGE Handbook of Qualitative...The Art of Science. In: Denzin , N. K. and Lincoln , Y. S. (eds.) Handbook of Qualitative Research. Thousand Oaks, Sage 19. GAO (1990) Case Study...Rinehart & Winston 39. Stake, R. E. (1994) Case Studies. In: Denzin , N. K. and Lincoln , Y. S. (eds.) Handbook of Qualitative Research. Thousand Oaks, Sage

Study of barium bismuth titanate prepared by mechanochemical synthesis

Directory of Open Access Journals (Sweden)

Lazarević Z.Ž.

2009-01-01

Full Text Available Barium-bismuth titanate, BaBi4Ti4O15 (BBT, a member of Aurivillius bismuth-based layer-structure perovskites, was prepared from stoichiometric amounts of barium titanate and bismuth titanate obtained via mechanochemical synthesis. Mechanochemical synthesis was performed in air atmosphere in a planetary ball mill. The reaction mechanism of BaBi4Ti4O15 and the preparation and characteristics of BBT ceramic powders were studied using XRD, Raman spectroscopy, particle analysis and SEM. The Bi-layered perovskite structure of BaBi4Ti4O15 ceramic forms at 1100 °C for 4 h without a pre-calcination step. The microstructure of BaBi4Ti4O15 exhibits plate-like grains typical for the Bi-layered structured material and spherical and polygonal grains. The Ba2+ addition leads to changes in the microstructure development, particularly in the change of the average grain size.

Effects of three types of retirement preparation program : A qualitative study of civil servants in Brazil

NARCIS (Netherlands)

Leandro-Franca, Cristineide; Van Solinge, Hanna; Henkens, Kene; Murta, Sheila Giardini

2016-01-01

Studies on the effectiveness of retirement planning programs are relatively scarce. Retirement preparation and planning programs may assist individuals to smooth the transition to retirement and subsequent adjustment. This qualitative study examines the effects of three retirement preparation

Pathological Imitative Behavior and Response Preparation in Schizophrenia.

Science.gov (United States)

Dankinas, Denisas; Melynyte, Sigita; Siurkute, Aldona; Dapsys, Kastytis

2017-08-01

Pathological imitative behavior (ehopraxia) is occasionally observed in schizophrenia patients. However, only a severe form of echopraxia can be detected with the help of a direct observation. Therefore, our goal was to study a latent form of pathological imitative behavior in this disorder, which is indicated by an increase of imitative tendencies. In our study, 14 schizophrenia patients and 15 healthy subjects were employed in two tasks: (a) in an imitative task they had to copy a hand action seen on a screen; (b) in a counter-imitative task they had to make a different movement (which involves an inhibition of prepotent imitative tendency that is impaired in case of pathological imitative behavior). Imitative tendencies were assessed by an interference score - a difference between counter-imitative and imitative response parameters. We also studied a response preparation in both groups by employing precueing probabilistic information. Our results revealed that schizophrenia patients were able to employ probabilistic information to prepare properly not only the imitative, but also the counter-imitative responses, the same as the healthy subjects did. Nevertheless, we detected increased prepotent imitative tendencies in schizophrenia patients, what indicates the latent pathological imitative behavior in case of this disorder. The obtained results suggest that in the case of schizophrenia problems with pathological imitative behavior more likely occurred in executive rather than in the preparatory stage of response. Our findings can help to detect a latent echopraxia in schizophrenia patients that cannot be revealed by direct observation. © The Author 2017. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Evaluation of research methods to study domestic food preparation

NARCIS (Netherlands)

Bongoni, R.; Verkerk, R.; Dekker, M.; Steenbekkers, B.

2015-01-01

Purpose – Domestic preparation practices influence the sensory properties and nutritional composition of food products. Information on the variability in actual domestic preparation practices is needed to assess the influence of applied conditions on the sensory and nutritional quality of food. The

TOGAF version 9 foundation study guide preparation for the TOGAF 9 Part 1 examination

CERN Document Server

Harrison, Rachel

2009-01-01

This document is a Study Guide for TOGAF™ 9 Foundation.It gives an overview of every learning objective for the TOGAF 9 Foundation Syllabus and in-depth coverage on preparing and taking the TOGAF 9 Part 1 Examination. It is specifically designed to help individuals prepare for certification.

Magistral preparation in nuclear medicine departments: Requirements for their realization; Preparations magistrales en radiopharmacie: contraintes liees a la mise en place

Energy Technology Data Exchange (ETDEWEB)

Desruet, M.D. [Radiopharmacie, clinique universitaire de medecine nucleaire, CHU de Grenoble, 38 - Grenoble (France); Bolot, C. [Radiopharmacie, hospices civils de Lyon, groupement hospitalier Est, 69 - Bron (France); Bourrel, F. [Services de pharmacie et medecine nucleaire, centre hospitalier d' Avignon, 84 - Avignon (France); Francois-Joubert, A.; Biechlin-Chassel, M.L. [Medecine nucleaire et Radiopharmacie, centre hospitalier de Chambery, 73 - Chambery (France); Couret, I. [Service de medecine nucleaire, hopital Lapeyronie, 34 - Montpellier (France); Pelegrin, M. [Institut de recherche en cancerologie (IRCM), 34 - Montpellier (France); Service de medecine nucleaire, hopital Purpan, 31 - Toulouse (France); Lao, S. [Service de medecine nucleaire, CHU Hopital de l' Archet, 06 - Nice (France); Ouhayon, E.; Sauvan, R. [Service de medecine nucleaire, institut Paoli-Calmettes, 13 - Marseille (France)

2010-11-15

Use of radiopharmaceuticals in French nuclear medicine departments depends on marketing authorization and their development may be compromised by a limited return on investment. As an alternative, radiopharmaceuticals may also be prepared in the form of a magistral preparation, like in some European countries. In this case, these preparations are subjected to restrictions and requirements for radio-pharmacies relating to quality assurance, facilities and equipment, quality of starting materials and final radiopharmaceutical products defined in French good preparation practice. Labelled tracers used as magistral preparations have to be prepared under the full responsibility of a radio-pharmacist and used under the responsibility of the prescribing physician. Conditions of sufficient guarantees for the safety of the patient and adherence to pharmaceutical rules must be evaluated individually. However, this form of preparation intends to supply specific medical needs for an individual patient and is not an answer in the framework of development of radiopharmaceuticals. (authors)

Comparative Study of Three Rotary Instruments for root canal Preparation using Computed Tomography

International Nuclear Information System (INIS)

Mohamed, A.M.E.

2015-01-01

Cleaning and shaping the root canal is a key to success in root canal treatment. This includes the removal of organic substrate from the root canal system by chemo mechanical methods, and the shaping of the root canal system into a continuously tapered preparation. This should be done while maintaining the original path of the root canal. Although instruments for root canal preparation have been progressively developed and optimized, a complete mechanical debridement of the root canal system is rarely achievable. One of the main reasons is the geometrical dis symmetry between the root canal and preparation instruments. Rotary instruments regardless of their type and form produce a preparation with a round outline if they are used in a simple linear filing motion, which in most of the cases do not coincide with the outline of the root canal. Root canal preparation in narrow, curved canals is a challenge even for experienced endodontists. Shaping of curved canals became more effective after the introduction of nickel-titanium (Ni-Ti) endodontic instruments. Despite the advantages of Ni-Ti rotary instruments, intra canal fracture is the most common procedural accident that occurs with these instruments during clinical use. It is a common experience between clinicians that Ni-Ti rotary instruments may undergo unexpected fracture without any visible warning, such as any previous permanent defect or deformation. Pro Taper Ni-Ti instruments were introduced with a unique design of variable taper within one instrument and continuously changing helical angles. Pro Taper rotary instruments are claimed to generate lower torque values during their use because of their modified nonradial landed cross-section that increases the cutting efficiency and reduces contact areas. On the other hand, the variable taper within one instrument is believed to reduce the ‘taper lock’ effect (torsional failure) in comparison with similarly tapered instruments. Nevertheless, Pro Taper

A Quantitative Correlational Study of Teacher Preparation Program on Student Achievement

Science.gov (United States)

Dingman, Jacob Blackstone

2010-01-01

The purpose of this quantitative correlational study was to identify the relationship between the type of teacher preparation program and student performance on the seventh and eighth grade mathematics state assessments in rural school settings. The study included a survey of a convenience sample of 36 teachers from Colorado and Washington school…

The Role of Adolescents From a Low Socioeconomic Background in Household Food Preparation: A Qualitative Study.

Science.gov (United States)

Leak, Tashara M; Aasand, Taylor A; Vickers, Zata; Reicks, Marla

2018-05-01

The purpose of this study was to understand adolescents' from low-income households perceptions of their involvement in home food preparation, reasons underlying the extent to which they were involved, and positive and negative consequences associated with their involvement. Semistructured interviews were conducted with a convenience sample of 19 adolescents (13-18 years). Audio-recorded interviews were transcribed verbatim. Themes were identified using grounded theory and the constant comparative method. Eight adolescents described cooking as a primary responsibility due to adult work and family schedules, age, gender, and/or cultural expectations. They were typically preparing food for themselves and their family without assistance, and making decisions about what was prepared. They identified positive and negative consequences including enjoyment and satisfaction, as well as stress and less time for other activities. Eleven adolescents mostly assisted the primary food preparer, with little input in deciding what was prepared. They identified benefits such as enjoyment and family interaction. Foods prepared by many adolescents tended to be quick and easy to prepare foods. Future studies should investigate the relationship between adultified cooking responsibilities, diet quality, and health. Also, cooking education for adolescents needs to address how to prepare a healthy family meal on a budget.

Case Study: The Chemistry of Cocaine

Science.gov (United States)

Dewprashad, Brahmadeo

2011-01-01

This column provides original articles on innovations in case study teaching, assessment of the method, as well as case studies with teaching notes. This month's case study focuses on the chemistry of cocaine to teach a number of core concepts in organic chemistry. It also requires that students read and analyze an original research paper on…

The role of radionuclide studies in emergency cases

International Nuclear Information System (INIS)

Nishimura, Tsunehiko; Hayashida, Kohei; Uehara, Toshiisa

1982-01-01

Radionuclide studies have been performed popularly because of its noninvasive and simple method recently. In this study, we applied this technique for the evaluation of emergency cases in cardiovascular diseases. There were 93 cases (1.5%) out of 6163 cases, done during 1981. The subjects were 34 cases of cardiac studies (9 cases of sup(99m)Tc-PYP myocardial imaging, 12 cases of thallium myocardial imaging, 13 cases of cardioangiography), 23 cases of peripheral diseases (12 cases of peripheral angiography, 11 cases of venography), 16 cases of pulmonary imaging, 10 cases of renal studies (6 cases of renal angiography, 9 cases of renal imaging) and 5 cases of brain angiography. These studies were proven to be useful clinically for the evaluation of emergency cases and follow-up studies. In the near future, ''emergency radionuclide studies'' would be benefit for the high-risk patients noninvasively. (author)

Preparation and intercalation study of ternary transition elements chalcogenides AxMXn

International Nuclear Information System (INIS)

Kassem, M.

1999-01-01

The crystalline powders of transition elements chalcogenides have been prepared by solid-solid reaction method starting from elemental powders in evacuated and sealed quartz tubes heated at various temperatures depending on the compound to be prepared. The structures and composition of the obtained compounds have been studied by X-ray diffraction and X-ray fluorescence techniques. Intercalation compounds Co x MX 2 have been obtained by heating the powder with elemental cobalt at 500 Centigrade. The results of the structural studies show that the intercalation of cobalt is a regular phenomena and the cobalt atoms play the role of staples for the layers constructing the crystalline structure of starting materials. This stapling phenomena is accompanied by changes in distance between the layers and therefore changes in the length of bonds between the elements of compound. The changes in the length of bonds have been confirmed by the results of FTIR studies.(author)

eCompetence Case Studies

DEFF Research Database (Denmark)

Jensen, Helle Bækkelund

2006-01-01

In this paper we present some details of the processes undertaken in the European eCompetence Initiative. We present two illustrative and representative case studies. The research aims to identify and understand patterns of individual and organisational eCompetence approaches.......In this paper we present some details of the processes undertaken in the European eCompetence Initiative. We present two illustrative and representative case studies. The research aims to identify and understand patterns of individual and organisational eCompetence approaches....

Case Study Methodology and Homelessness Research

Directory of Open Access Journals (Sweden)

Jill Pable

2013-10-01

Full Text Available This paper describes the potential suitability of case study methodology for inquiry with the homeless population. It references a research study that uses case study research method to build theory. This study's topic is the lived experience of destitute individuals who reside in homeless shelters, and explores the homeless shelter built environment's potential influence on resident satisfaction and recovery. Case study methodology may be appropriate because it explores real-life contextual issues that characterize homelessness and can also accommodate the wide range of homeless person demographics that make this group difficult to study in a generalized fashion. Further, case study method accommodates the need within research in this area to understand individualized treatments as a potential solution for homelessness.

Assembling a Case Study Tool Kit: 10 Tools for Teaching with Cases

Science.gov (United States)

Prud'homme-Généreux, Annie

2017-01-01

This column provides original articles on innovations in case study teaching, assessment of the method, as well as case studies with teaching notes. The author shares the strategies and tools that teachers can use to manage a case study classroom effectively.

Preparation, characterization and electrical study of gum arabic/ZnO ...

Indian Academy of Sciences (India)

Gum arabic (GA)-mediated chemical synthesis was carried out for obtaining ZnO nanoparticles (ZnO-NPs) (particle size of ZnO ≈ 40 nm) which, in turn, was used for preparing ZnO–biopolymer nanocomposites. The dielectric study of this synthesized products is reported in this paper. The synthesized products were ...

JET Tokamak, preparation of a safety case for tritium operations

Energy Technology Data Exchange (ETDEWEB)

Boyer, Helen, E-mail: helen.boyer@ccfe.ac.uk [CCFE, Culham Science Centre (United Kingdom); Plummer, David; Johnston, Jane [CCFE, Culham Science Centre (United Kingdom)

2016-11-01

Highlights: • A safety case incorporating technical and ITER related upgrades. • Hazard analysis reworked to include new modelling assessments. • Fitness for purpose assessment of safety controls. - Abstract: A new Safety Case is required to permit tritium operations on JET during the forthcoming DTE2 campaign. The outputs, benefits and lessons learned associated with the production of this Safety Case are presented. The changes that have occurred to the Safety Case methodology since the last JET tritium Safety Case are reviewed. Consideration is given to the effects of modifications, particularly ITER related changes, made to the JET and the impact these have on the hazard assessments as well as normal operations. Several specialized assessments, including recent MELCOR modelling, have been undertaken to support the production of this Safety Case and the impact of these assessments is outlined. Discussion of the preliminary actions being taken to progress implementation of this Safety Case is provided, highlighting new methods to improve the dissemination of the key Safety Case results to the plant operators. Finally, the work required to complete this Safety Case, before the next tritium campaign, is summarized.

A Comparative Study of Leadership Preparation Programs in Gama (Brazil) and the United States

Science.gov (United States)

Borges-Gatewood, Mara Rubia Fonseca; McNeal, Larry

2013-01-01

The objective of the study was to determine the relationship, if any, between leadership preparation programs types and how well school administrators are prepared to set a widely shared vision, develop a school culture, effectively manage school operations and resources, collaborate with faculty and community members, act with integrity and…

On misunderstandings in connection with case-studies

DEFF Research Database (Denmark)

Flyvbjerg, Bent

2005-01-01

This article examines five common misunderstandings about case-study research: (1) Theoretical knowledge is more valuable than practical knowledge; (2) One cannot generalize from a single case, therefore the single case study cannot contribute to scientific development; (3) The case study is most...

Analgesics use and ESRD in younger age: a case-control study

Directory of Open Access Journals (Sweden)

Moehner Sabine

2007-12-01

Full Text Available Abstract Background An ad hoc peer-review committee was jointly appointed by Drug Authorities and Industry in Germany, Austria and Switzerland in 1999/2000 to review the evidence for a causal relation between phenacetin-free analgesics and nephropathy. The committee found the evidence as inconclusive and requested a new case-control study of adequate design. Methods We performed a population-based case-control study with incident cases of end-stage renal disease (ESRD under the age of 50 years and four age and sex-matched neighborhood controls in 170 dialysis centers (153 in Germany, and 17 in Austria from January 1, 2001 to December 31, 2004. Data on lifetime medical history, risk factors, treatment, job exposure and intake of analgesics were obtained in a standardized face-to-face interview using memory aids to enhance accuracy. Study design, study performance, analysis plan, and study report were approved by an independent international advisory committee and by the Drug Authorities involved. Unconditional logistic regression analyses were performed. Results The analysis included 907 cases and 3,622 controls who had never used phenacetin-containing analgesics in their lifetime. The use of high cumulative lifetime dose (3rd tertile of analgesics in the period up to five years before dialysis was not associated with later ESRD. Adjusted odds ratios with 95% confidence intervals were 0.8 (0.7 – 1.0 and 1.0 (0.8 – 1.3 for ever- compared with no or low use and high use compared with low use, respectively. The same results were found for all analgesics and for mono-, and combination preparations with and without caffeine. No increased risk was shown in analyses stratifying for dose and duration. Dose-response analyses showed that analgesic use was not associated with an increased risk for ESRD up to 3.5 kg cumulative lifetime dose (98 % of the cases with ESRD. While the large subgroup of users with a lifetime dose up to 0.5 kg (278 cases and

Preparation and response in case of natural disasters: Cuban programs and experience.

Science.gov (United States)

Mas Bermejo, Pedro

2006-01-01

Inadequate preparation for national disasters is frequently particularly devastating in lower income countries. The Cuba's location has a diversity of potential natural disasters, including hurricanes, non-tropical depressions, tropical storms, tropical cyclones, and severe local storms, all with intense rains and winds, earthquakes and droughts. Cuban preparation, at all levels, is geared to these predominant threats. Planning for natural disasters is integral to the political and economic life of Cuba, nationally and locally. On several occasions, United Nations (UN) officials have pointed to Cuba as a model for developing countries preparing for hurricanes and other natural disasters. A global policy for managing the risks of natural disasters could improve continuity of assistance for development and reduce the necessity of humanitarian aid. Planning in advance of disasters is a feasible way of helping people, by reducing expenses of emergencies, recuperation, and reconstruction. As climate changes accelerate, many researchers fear a period of irreversible and uncontrollable change. While the atmosphere continues to warm, it generates more intense rains, more frequent heat waves, and more ferocious storms. Thus, achieving better protection of developing countries from an increasing onslaught of natural disasters will only grow in importance. Even though Cuba's contribution to know-how has been recognized by United Nations' officials, progress toward more adequate preparation worldwide has been slow. To support other countries beyond conveying the lessons, Cuba now offers specially trained personnel to cooperate immediately with any country suffering a natural disaster.

Cost decreases in environmental technology. Evidence from four case studies

Energy Technology Data Exchange (ETDEWEB)

Oosterhuis, F. [Instituut for Environmental Studies, Vrije Universiteit VU, Amsterdam (Netherlands)

2007-07-15

The cost of a new technology tends to decrease as its uptake grows, and environmental technology is no exception to this general rule. Factors that can bring about such cost reductions include economies of scale, 'learning-by-doing', incremental technological improvements, and growing competition. In preparing environmental policies, the potential for future cost reductions is often disregarded. The present study aims to provide some additional empirical evidence on the cost decreases in environmental technology and the factors that lie behind them. To this end, four exemplary case studies have been selected. The first case (NOx emission abatement by Selective Catalytic Reduction (SCR)), shows a wide variety in cost estimates, without a clear trend. This is even true for the costs of a fairly homogeneous type of investment (SCR in coal fired power plants). Nevertheless, it is clear that an important cost decrease has been achieved by prolonging the lifetime of the catalyst, which is one of the main cost components in SCR. In the second case (NH3 emission abatement by chemical air scrubbers in pig farming) there is not yet sufficient experience with the technology to draw conclusions on the development of costs. However, it is already clear that economizing on the capacity of the system can contribute to important cost savings. Three-way catalytic converters in cars have shown significant price decreases following their large scale introduction on the European market in the early 1990s. Probably economies of scale have played an important role in this case, as the size of the market made mass production possible. To some extent, cost reductions may also be attributed to improvements such as the need for less materials (e.g. platinum). Furthermore, the performance of catalytic converters has improved, implying that the cost per unit of emission reduction has decreased even more than the cost of the device itself. Market prices of Compact Fluorescent Lamps

Translanguaging in Bilingual Teacher Preparation: Exploring Pre-Service Bilingual Teachers' Academic Writing

Science.gov (United States)

Musanti, Sandra I.; Rodríguez, Alma D.

2017-01-01

Translanguaging, or the complex, dynamic, and integrated linguistic practices of bilinguals have been recently identified as a pedagogical strategy to facilitate learning in bilingual classrooms. Given its potential implications for teacher preparation, a qualitative case study was conducted at a university on the Texas-Mexico border to explore…

OUTSOURCING FAILURES IN SME’S: CASE STUDY APPROACH

Directory of Open Access Journals (Sweden)

Kaja Prystupa

2015-06-01

Full Text Available Outsourcing, which is a popular business strategy among large companies, is also an attractive option for small entities. However, in order to bring expected results, outsourcing requires knowledge of potential risks and ability of managing them. Even large companies need to face various outsourcing challenges, however, at least they dispose richer resources than small organizations and their success is less dependent on single product delivery. Therefore the aim of the research was to examine the reasons of failure of outsourcing initiatives in SMEs. The authors followed the qualitative approach based on case study method. The obtained results brought contributions in both areas: theoretical as the issue of outsourcing initiatives in SMEs has been analysed to a limited extent; as well as practical because it brought important insight for managers by indicating risks of that they should be aware and properly prepared. The findings indicated the importance of: strategic planning on outsourcing initiative and the development and maintenance of close relations of outsourcing companies with its vendor.

Qualitative Case Study Research as Empirical Inquiry

Science.gov (United States)

Ellinger, Andrea D.; McWhorter, Rochell

2016-01-01

This article introduces the concept of qualitative case study research as empirical inquiry. It defines and distinguishes what a case study is, the purposes, intentions, and types of case studies. It then describes how to determine if a qualitative case study is the preferred approach for conducting research. It overviews the essential steps in…

PSYCHOLOGICAL PREPARATION OF COMPETITIVE JUDOKAS - A REVIEW

Directory of Open Access Journals (Sweden)

Gal Ziv

2013-09-01

Full Text Available The purpose of this article was to review a series of studies (n = 18 on psychological preparation of competitive judokas. These studies were grouped according to the type of study performed - observational, experimental, and case studies. In addition, five psychological categories were identified: (a imagery, (b motivation, (c stress, anxiety, and mood states, (d eating attitudes and weight control, and (e coach/athlete interactions. The main findings of this review are that (a there is a lack of data regarding the use of imagery to improve judo performance; (b goal involvement states of competitive judokas fluctuate and undergo abrupt changes during actual combat, according to the ecological constraints of the situation; (c cortisol levels and somatic and cognitive anxiety tend to increase prior to and during a judo combat; (d weight reduction programs that judokas undergo prior to a judo combat can lead to unpleasant moods, and cultural differences can lead to conflicting results; (e psychological preparation plans should be tailored to each individual judoka, as there can be significant individual differences among the judokas. Based on the findings of our review, a number of research limitations and methodological concerns are discussed

Learning How to Be a Research-Minded Teacher: Four Instrumental Music Education Students Investigate Good Music Teaching through Case Study Methodology

Science.gov (United States)

Sindberg, Laura K.

2016-01-01

Increasing evidence, both in general education and music education, points to the significance of inquiry as a part of teacher preparation. The purpose of this case study was to investigate the ways in which an introductory research project would help preservice music educators understand good "music teaching" and to discover the extent…

EXPLAINING THE AUDIT RISK AND ITS COMPONENTS: A COMPARATIVE CASE-STUDY BASED ON AUDIT REPORTS

Directory of Open Access Journals (Sweden)

ALINA VOICULESCU

2014-08-01

Full Text Available The players activating in the post-recession business environment have to and begin to be more and more prudent and attentive to any sign of human errors, uncertainty, lack of objectivity, attempt of fraud which may occur when financial statements are prepared, in their own case or in the case of their trade clients/suppliers, debtors, business partners, in general. Auditors thus became the mediators between the producers and the users of accountant information, using their high theoretical training, authority, competence and independence as pledge for the fairness of the financial statements and for the compliance with the Law. But even their reports are subject to uncertainty, therefore the author considered useful to approach in the current paper the issue of risk in financial audit, by use of a study-case of several audit reports, in order to explain and exemplify it and to highlight the difference between its components’ evaluation.

Methodology for the case studies

NARCIS (Netherlands)

Smits, M.J.W.; Woltjer, G.B.

2017-01-01

This document is about the methodology and selection of the case studies. It is meant as a guideline for the case studies, and together with the other reports in this work package can be a source of inform ation for policy officers, interest groups and researchers evaluating or performing impact

Performable Case Studies in Ethics Education.

Science.gov (United States)

Robeson, Richard; King, Nancy M P

2017-09-12

Bioethics education often includes the study of short stories, novels, plays, and films, because such materials present case examples that can highlight relevant issues and questions especially vividly for a wide range of students. In addition, creative writing is widely used in the education of health professional students and in continuing education settings for health professionals. There are very few academic or professional disciplines that do not use case studies, but the case study in dialogic form has not been standard practice for thousands of years. Dramatic arts casuistry-the creation and performance of short case studies designed specifically to raise bioethics issues for discussion-represents an application of literature and the medical humanities that is both unique and uniquely valuable. This essay describes the development and history of a course that has been successfully taught to medical students and graduate bioethics students, in which the class researches, writes, and performs a case study designed to elicit reflection and discussion about a topic and set of bioethics issues of current interest to both academic and general audiences. The model is also suited to the presentation and discussion of existing case studies, both live and via on-demand audio.

Emotion, Engagement, and Case Studies

Science.gov (United States)

Herreid, Clyde Freeman; Terry, David R.; Lemons, Paula; Armstrong, Norris; Brickman, Peggy; Ribbens, Eric

2014-01-01

Three college faculty taught large general biology classes using case studies and personal response systems (clickers). Each instructor taught the same eight cases in two different sections, except the questions within the cases differed. In one section the questions were lower order (LO) factual inquiries, and in the other they were largely…

Using Correspondence Analysis in Multiple Case Studies

NARCIS (Netherlands)

Kienstra, Natascha; van der Heijden, Peter G.M.

2015-01-01

In qualitative research of multiple case studies, Miles and Huberman proposed to summarize the separate cases in a so-called meta-matrix that consists of cases by variables. Yin discusses cross-case synthesis to study this matrix. We propose correspondence analysis (CA) as a useful tool to study

Using correspondence analysis in multiple case studies

NARCIS (Netherlands)

Kienstra, N.H.H.; van der Heijden, P.G.M.

2015-01-01

In qualitative research of multiple case studies, Miles and Huberman proposed to summarize the separate cases in a so-called meta-matrix that consists of cases by variables. Yin discusses cross-case synthesis to study this matrix. We propose correspondence analysis (CA) as a useful tool to study

Preparation of chromatographic and solid-solvent extraction 99mTc generators using gel-type targets

International Nuclear Information System (INIS)

Le Van So

2000-01-01

We have studied two types of targets zirconium-molybdate (ZrMo) and titanium-molybdate (TiMo) prepared by precipitating reaction between ammonium-molybdate and zirconium-chloride or titanium-chloride solutions, respectively. Other types of targets were also prepared by co-precipitating ZrMo or TiMo with hydrous manganese-dioxide, hydrous silica, and hydrous titanium-dioxide or by impregnated ZrMo or TiMo with Iodate anions. The results on extraction of Tc-99m from neutron irradiated TiMo solid phase using solvents such as MEK, aceton, ethylic ether, chloroform, etc showed that separation yield (SY) of Tc-99m in case of aceton extraction was from 70% to 80% and in other cases non higher than 40%. The Tc-99m elution curves and column kinetic in case of aceton extraction (after evaporation of aceton and recovery of Tc-99m in 0,9% NaCl solution) was superior than in case chromatographic generator using saline eluant. As result obtained, two types of generators were successfully prepared and put into use: Chromatographic generator using titanium-molybdate target as packing material and saline as eluant. Solid-solvent extraction 99m Tc generator using titanium-molybdate target (as solid phase) and aceton as extracting solvent. (author)

Teaching Business French through Case Studies: Presentation of a Marketing Case.

Science.gov (United States)

Federico, Salvatore; Moore, Catherine

The use of case studies as a means for teaching business French is discussed. The approach is advocated because of the realism of case studies, which are based on actual occurrences. Characteristics of a good case are noted: it tells a story, focuses on interest-arousing issues, is set in the past 10 years, permits empathy with the main…

Case Study: Puttin' on the Ritz: How to Put Science into Cases

Science.gov (United States)

Herreid, Clyde Freeman

2017-01-01

There are multiple ways to put science into a case. This column provides original articles on innovations in case study teaching, assessment of the method, as well as case studies with teaching notes. This month's issue discusses different ways of presenting science in case studies.

A study of UF4 preparations

International Nuclear Information System (INIS)

Chang, I.S.; Doh, J.B.; Choi, Y.D.

1985-05-01

Uranium tetrafluoride (UF 4 ), green salt, is very important intermediate in the production of metallic uranium and uranium hexafluoride (UF 6 ) for enrichment. The hydrofluorination of uranium dioxide (UO 2 ) with anhydrous hydrogen fluoride (HF), produced from ADU (ammonium diuranate) process or AUC (ammonium uranyl carbonate) process, are commercially used for the production of uranium tetrafluoride. At present, a new approach such as direct UF 4 preparation at the mine-site without further precipitation, filteration and drying of yellow cake from leaching solution has been studied. The single step continous reduction of uranium hexafluoride to uranium tetrafluoride is one of the most interesting process being applied for the commercial use of a large amount of depleted UF 6 which is produced in tail after enrichment. The direct conversion of UF 6 and UF 4 with hydrogen and fluorine gases using cold wall reactor has a certain advantage over various wet process such as AUD and AUC processes in which hydrolysis of UF 6 and various kind of chemicals are required, including liquid waste treatment. This report reviews and analyzes the theory and processes being used commercially or under study. (Author)

Wound bed preparation for ischemic diabetic foot ulcer.

Science.gov (United States)

Zhang, Zhaoxin; Lv, Lei; Guan, Sheng

2015-01-01

This study is to evaluate the effect of allograft skin on wound angiogenesis and wound bed preparation of ischemic diabetic foot ulcer. A total of 60 cases of patients with diabetic foot ulcer were randomly divided into the experimental group (n = 30) and the control group (n = 30). After debridement, in the experimental group, allograft skin was used to cover the wound while in the control group, vaseline and gauze was used to cover the wound. The wound was opened and dressed at 3, 5, 7, 14 days after operation and the growth condition of the granulation tissue was observed and recorded. The wound bed preparation time of the experimental group was 14.37 ± 1.06 days, compared with the control group 25.99 ± 4.03 days, there was statistically significant difference (t = 14.78, P cure time of the experimental group was 32 ± 1.93 days and this time was significantly shortened than the control group 39.73 ± 2.55 days (t = 12.521, P ulcer and shorten the wound bed preparation time and treatment cycle.

Case Study Observational Research: A Framework for Conducting Case Study Research Where Observation Data Are the Focus.

Science.gov (United States)

Morgan, Sonya J; Pullon, Susan R H; Macdonald, Lindsay M; McKinlay, Eileen M; Gray, Ben V

2017-06-01

Case study research is a comprehensive method that incorporates multiple sources of data to provide detailed accounts of complex research phenomena in real-life contexts. However, current models of case study research do not particularly distinguish the unique contribution observation data can make. Observation methods have the potential to reach beyond other methods that rely largely or solely on self-report. This article describes the distinctive characteristics of case study observational research, a modified form of Yin's 2014 model of case study research the authors used in a study exploring interprofessional collaboration in primary care. In this approach, observation data are positioned as the central component of the research design. Case study observational research offers a promising approach for researchers in a wide range of health care settings seeking more complete understandings of complex topics, where contextual influences are of primary concern. Future research is needed to refine and evaluate the approach.

Beyond Clinical Case Studies in Psychoanalysis: A Review of Psychoanalytic Empirical Single Case Studies Published in ISI-Ranked Journals

Science.gov (United States)

Meganck, Reitske; Inslegers, Ruth; Krivzov, Juri; Notaerts, Liza

2017-01-01

Single case studies are at the origin of both theory development and research in the field of psychoanalysis and psychotherapy. While clinical case studies are the hallmark of psychoanalytic theory and practice, their scientific value has been strongly criticized. To address problems with the subjective bias of retrospective therapist reports and uncontrollability of clinical case studies, systematic approaches to investigate psychotherapy process and outcome at the level of the single case have been developed. Such empirical case studies are also able to bridge the famous gap between academic research and clinical practice as they provide clinically relevant insights into how psychotherapy works. This study presents a review of psychoanalytic empirical case studies published in ISI-ranked journals and maps the characteristics of the study, therapist, patient en therapies that are investigated. Empirical case studies increased in quantity and quality (amount of information and systematization) over time. While future studies could pay more attention to providing contextual information on therapist characteristics and informed consent considerations, the available literature provides a basis to conduct meta-studies of single cases and as such contribute to knowledge aggregation. PMID:29046660

A comparative study of the effects of Vitex agnus castus upon premenstrual syndrome in a mother tincture preparation and in a 3X homoeopathic preparation

OpenAIRE

2014-01-01

M.Tech. (Homeopathy) The purpose of this study was to compare the effectiveness of a mother tincture preparation of Vitex agnus-castus and a hornoeopathic 3x preparation of Vitex agnus-castus in the treatment of premenstrual syndrome. A sample of 15 subjects suffering from premenstrual syndrome was selected. The subjects were selected according to the diagnostic criteria of premenstrual syndrome and certain other criteria requtred for the study. The subjects were given questionnaires to co...

Cofiring of biofuels in coal fired boilers: Results of case study analysis

Energy Technology Data Exchange (ETDEWEB)

Tillman, D.A. [Ebasco Environmental, Sacramento, CA (United States); Hughes, E. [Electric Power Research Institute, Palo Alto, CA (United States); Gold, B.A. [TVA, Chattanooga, TN (United States)

1993-12-31

Ebasco Environmental and Reaction Engineering, under contract to EPRI, performed a case study analysis of cofiring biomass in coal-fired boilers of the Tennessee Valley Authority (TVA). The study was also sponsored by DOE. This analysis included evaluating wood fuel receiving, preparation, and combustion in pulverized coal (PC) boilers and cyclone furnaces and an assessment of converting wood into pyrolysis oil or low Btu gas for use in a new combined cycle combustion turbine (CCCT) installation. Cofiring wood in existing coal-fired boilers has the most immediate potential for increasing the utilization of biofuels in electricity generation. Cofiring biofuels with coal can potentially generate significant benefits for utilities including: (1) reducing emissions of SO{sub 2} and NO{sub x}; (2) reducing the net emissions of CO{sub 2}; (3) potentially reducing the fuel cost to the utility depending upon local conditions and considering biomass is potentially exempt from the proposed Btu tax and may get a 1.5 cent/kWh credit for energy generated by wood combustion; (4) supporting local industrial forest industry; and (5) providing a long term market for the development of a biofuel supply and delivery industry. Potential benefits are reviewed in the context of cofiring biofuel at a rate of 15% heat input to the boiler, and compares this cofiring strategy and others previously tested or developed by other utilities. Other issues discussed include: (1) wood fuel specifications as a function of firing method; (2) wood fuel receiving and preparation system requirements; (3) combustion system requirements for cofiring biofuels with coal; (4) combustion impacts of firing biofuels with coal; (5) system engineering issues; (6) the economics of cofiring biofuel with coal. The Allen, TN 330 MW(e) cyclone boiler and Kingston, TN 135 MW(e) Boiler {number_sign}1, a tangentially fired PC unit, case studies are then summarized in the paper, highlighting the cofiring opportunities.

CROSSFIT – mental training. Case study

Directory of Open Access Journals (Sweden)

Beata Rolak

2017-08-01

Full Text Available Introduction: CrossFit is a challenging sport. It enforces full engagement of the athlete in every move during every training session. CrossFit teaches perseverance, discipline and respect. Sports psychology allows for in-depth analysis of trainings or competitions. The athlete can better prepare himself for what he may face, both on the mistakes made and on success. Regular mental training supports the athlete's ability to be successful in sports. The aim of the study: The purpose of this paper was to demonstrate the relationship between mental training - here mainly focused on concentration, self-confidence and imagery,  CrossFit and sports performance. Material and the method: This paper is a case study. The subject of the study was a male - 30 years old, training crossfit, with the 3-year training experience. Meeting  period with the subject male was conducted for 2 months. Before and after the meeting period there were used below mentioned methods: Sports Confidence Inventory (TSCI-PL; The Sport Anxiety Scale (SAS; The Imagination in Sport Questionnaire; The Sport  Orientation Questionnaire (SOQ and the profile of skills.   Results: There was a noticeable increase of the results in the questionnaires: Sports Confidence Inventory (TSCI-PL; The Imagination in Sport Questionnaire; The Sport  Orientation Questionnaire (SOQ questionnaire for the self-confidence (TSCI-PL.  The Sport Anxiety Scale (SAS there was an increase of the results regarding the somatic anxiety and worrying also there was a decrease in the scale of distraction. Conclusion: The meeting period turned out to be effective, however the mental training requires regularity and longevity in order to maintain consistency and repeatability of behavior.

Use of a prescribed ephedrine/caffeine combination and the risk of serious cardiovascular events: a registry-based case-crossover study

DEFF Research Database (Denmark)

Hallas, Jesper; Bjerrum, Lars; Støvring, Henrik

2008-01-01

Ephedrine and herbal ephedra preparations have been shown to induce a small-to-moderate weight loss. Owing to reports on serious cardiovascular events, they were banned from the US market in 2004. There have been no large controlled studies on the possible association between prescribed ephedrine/caffeine...... and cardiovascular events in general. The authors linked data from four different sources within Statistics Denmark, using data on 257,364 users of prescribed ephedrine/caffeine for the period 1995-2002. The data were analyzed using a case-crossover technique with a composite endpoint: death outside of a hospital......, myocardial infarction, or stroke. To account for effects of chronic exposure and effects in naïve users, the authors performed a secondary case-control study nested within the cohort of ephedrine/caffeine ever users. Among 2,316 case subjects, 282 (12.2%) were current users of ephedrine/caffeine. The case...

Studies on ethno medicinal plant diversity in an urban area – a case study

Directory of Open Access Journals (Sweden)

Sudipta Biswas

2016-08-01

Full Text Available The present study deals with the Ethno-medicinal plants used by the local communities in Santragachhi area, under Howrah Municipal Corporation, ward no. 38, District Howrah, West Bengal, India. An ethno medicinal survey was carried out the use of medicinal plants in Santragachi region. The information was gathered from the local community people using an integrated approach botanical collections, group discussion and interview with questionnaire during 2012-2013. Among 50 informants interviewed, 10 were tribal practitioners. A total of 53 genera and 33 families are documented. In most of case, fresh parts of the plants were used for the preparation of medicine. The results further revealed that the natives of this area are not very much practiced in using the medicinal plants in the treatment of human illness. The study area is delimited by number of wetlands and the people collect the aquatic plants by their habitual knowledge as food resources. But due to expansion of city area, road construction causes loss of plant diversity and random exploitation of natural resources many valuable medicinal plants are at the stage of extinction. The present study documented ethno medicinal plants were mostly used for treatment of various diseases.

Study of preparation and surface morphology of self-ordered nanoporous alumina

International Nuclear Information System (INIS)

Rodrigues, Elisa Marchezini; Martins, Maximiliano Delany; Silva, Ronald Arreguy

2013-01-01

Nanoporous alumina is a typical material that exhibits self-ordered nanochannels spontaneously organized in hexagonal shape. Produced by anodizing of metallic aluminum, it has been used as a template for production of materials at the nanoscale. This work aimed to study the preparation of nanoporous alumina by anodic anodizing of metallic aluminum substrates. The nanoporous alumina was prepared following the methodology proposed by Masuda and Fukuda (1995), a two-step method consisting of anodizing the aluminum sample in the potentiostatic mode, removing the layer of aluminum oxide (alumina) formed and then repeat the anodization process under the same conditions as the first anodization. This method produces nanoporous alumina with narrow pore diameter distribution and well-ordered structure. (author)

Design and preparation of scenarios for human factors studies in the HAMMLAB

International Nuclear Information System (INIS)

Moracho, M. J.

1999-01-01

In the preparation of experiments for Human Factors studies, the scenarios play an important role. As a matter of fact, scenario effect is often demonstrated in the analysis of results. An experimental study referred to as Experiments' 97 was conducted in the Halden Man Machine LABoratory. In the design of the scenarios for this experiment, an effort was made for producing scenarios in compliance with the objectives of the study. Before the experiment simulations, scenario analysis was conducted and documented. This report presents some of the lessons learned from these activities. It also identifies main issues to be considered in the scenario characterisation and preparation. Examples of the scenarios' design document produced for the Experiments' 97 as well as examples of measure definitions for OPAS (OPerator Assessment System) and PPAS (Plant Performance System) are included in the appendixes (author) (ml)

HYDROGEOLOGIC CASE STUDIES

Science.gov (United States)

Hydrogeology is the foundation of subsurface site characterization for evaluations of monitored natural attenuation (MNA). Three case studies are presented. Examples of the potentially detrimental effects of drilling additives on ground-water samples from monitoring wells are d...

Sample preparation and study by electronic diffraction of oxidations and fluorinations of some metals and alloys

International Nuclear Information System (INIS)

Auguin, B.

1963-06-01

After having recalled that electron diffraction is particularly adapted to the study of thin films and surface layers, notably those forming during corrosions, and recalled some characteristics of this technique (wavelength, interactions with substances, parasite reactions, observation by transmission or reflection, obtained diagrams for polycrystalline and mono-crystalline substances), the author describes how samples are prepared in the case of examinations performed by transmission and by reflection. As fluorination agents are used for the separation of uranium 235 and 238, the second part discusses some works related to the fluorination of metals and alloys, some of them being used in these separation installations. Chlorine trifluoride is generally used and materials are generally oxidised. Thus, the author reports the study of the action of ClF 3 on different oxides. Oxidations of iron, nickel and Monel are addressed, as well as the behaviour of stainless steel. The study of fluorinations of metals (nickel, chromium, copper), alloys (stainless steel, Monel) and oxides is reported. The author finally addresses treatments performed after fluorinations: vacuum heating, action of humid air

Clinical nurses' perceptions and expectations of the role of doctorally-prepared nurses: a qualitative study in Iran.

Science.gov (United States)

Cheraghi, Mohammad-Ali; Jasper, Melanie; Vaismoradi, Mojtaba

2014-01-01

Nurses with doctorates are increasing in number throughout the world, yet the multitude of roles they play following graduation is unclear. The purpose of this study was to explore and describe clinical nurses' perceptions and expectations of the role of doctorally-prepared nurses in Iran. A qualitative study, using a content analysis approach was conducted with 43 clinical nurses chosen using a purposive sampling strategy. Oral, semi-structured and written interviews were used to generate data. During data analysis, three main themes emerged; "advantages of the doctoral degree", "clarification of doctorally-prepared nurses' role in clinical practice", and "unmet expectations of doctorally-prepared nurses". An understanding of the expectations of nurses on the role of doctorally-prepared nurses is needed to improve the collaboration between clinical nurses and doctorally-prepared nurses; remove misunderstandings on the abilities and skills of doctorally-prepared nurses; incorporate the expectations into doctoral education in order to facilitate their collaboration; and also remove the theory and practice gap through the utilisation of doctorally-prepared nurses' knowledge and skills in practice. Copyright © 2013 Elsevier Ltd. All rights reserved.

Preparation of inorganic crystalline compounds induced by ionizing, UV and laser radiation

International Nuclear Information System (INIS)

Cuba, V.; Pavelkova, T.; Barta, J.; Indrei, J.; Gbur, T.; Pospisil, M.; Mucka, V.; Docekalova, Z.; Zavadilova, A.; Vlk, M.

2011-01-01

Complete text of publication follows. Radiation methods represent powerful tool for synthesis of various inorganic materials. Study of solid particles formation from solutions in the field of UV or ionizing radiation is one of the very promising and long term pursued trends in photochemistry and radiation chemistry. The motivation may be various, either preparation of new materials or removal of hazardous contaminants (e.g. heavy metals) from wastewater. This work deals with preparation of some metal oxides, synthetic garnets and spinel structures via irradiation of aqueous solutions containing precursors, i.e. soluble metal salts, radical scavengers and/or macromolecular stabilizers. Namely, results on radiation induced preparation of nickel, zinc, yttrium and aluminium oxides are summarized, as well as zinc peroxide, yttrium / lutetium - aluminium garnets and cobalt(II) aluminate. 60 Co irradiator, linear electron accelerator, medium pressure UV lamp and solid state laser were used as the sources of radiation. Aside from preparation, various physico-chemical and structural properties of compounds prepared were also studied. All used modifications of radiation method are rather convenient and simple, and yield (nano)powder materials with interesting characteristics. Prepared materials generally have high chemical purity, high specific surface area and narrow distribution of particles size (ranging in tens of nm). Generally, all types of irradiation result in materials with comparable properties and structural characteristics; but in the case of synthetic garnets and spinels, preparation using UV-radiation seems to be the most convenient for their preparation. Among compounds discussed, only zinc oxide and zinc peroxide were prepared directly via irradiation. For preparation of other crystalline compounds, additional heat treatment (at low temperature) of amorphous solid phase formed under irradiation was necessary.

Electron microscopy and EXAFS studies on oxide-supported gold-silver nanoparticles prepared by flame spray pyrolysis

Energy Technology Data Exchange (ETDEWEB)

Hannemann, Stefan [Institute of Chemical and Bioengineering, Swiss Federal Institute of Technology, ETH Hoenggerberg, CH-8093 Zurich (Switzerland); Grunwaldt, Jan-Dierk [Institute of Chemical and Bioengineering, Swiss Federal Institute of Technology, ETH Hoenggerberg, CH-8093 Zurich (Switzerland)]. E-mail: grunwaldt@chem.ethz.ch; Krumeich, Frank [Laboratory of Inorganic Chemistry, Swiss Federal Institute of Technology, ETH Hoenggerberg, CH-8093 Zurich (Switzerland); Kappen, Peter [Department of Physics, La Trobe University, Victoria 3086 (Australia); Baiker, Alfons [Institute of Chemical and Bioengineering, Swiss Federal Institute of Technology, ETH Hoenggerberg, CH-8093 Zurich (Switzerland)

2006-09-15

Gold and gold-silver nanoparticles prepared by flame spray pyrolysis (FSP) were characterized by electron microscopy, in situ X-ray absorption spectroscopy (XANES and EXAFS), X-ray diffraction (XRD) and their catalytic activity in CO oxidation. Within this one-step flame-synthesis procedure, precursor solutions of dimethyl gold(III) acetylacetonate and silver(I) benzoate together with the corresponding precursor of the silica, iron oxide or titania support, were sprayed and combusted. In order to prepare small metal particles, a low noble metal loading was required. A loading of 0.1-1 wt.% of Au and Ag resulted in 1-6 nm particles. The size of the noble metal particles increased with higher loadings of gold and particularly silver. Both scanning transmission electron microscopy (STEM) combined with energy dispersive X-ray spectroscopy (EDXS) and X-ray absorption spectroscopy (XAS) studies proved the formation of mixed Au-Ag particles. In case of 1% Au-1% Ag/SiO{sub 2}, TEM combined with electron spectroscopic imaging (ESI) using an imaging filter could be used in addition to prove the presence of silver and gold in the same noble metal particle. CO oxidation in the presence of hydrogen was chosen as a test reaction sensitive to small gold particles. Both the influence of the particle size and the alloying of gold and silver were reflected in the CO oxidation activity.

Electron microscopy and EXAFS studies on oxide-supported gold-silver nanoparticles prepared by flame spray pyrolysis

International Nuclear Information System (INIS)

Hannemann, Stefan; Grunwaldt, Jan-Dierk; Krumeich, Frank; Kappen, Peter; Baiker, Alfons

2006-01-01

Gold and gold-silver nanoparticles prepared by flame spray pyrolysis (FSP) were characterized by electron microscopy, in situ X-ray absorption spectroscopy (XANES and EXAFS), X-ray diffraction (XRD) and their catalytic activity in CO oxidation. Within this one-step flame-synthesis procedure, precursor solutions of dimethyl gold(III) acetylacetonate and silver(I) benzoate together with the corresponding precursor of the silica, iron oxide or titania support, were sprayed and combusted. In order to prepare small metal particles, a low noble metal loading was required. A loading of 0.1-1 wt.% of Au and Ag resulted in 1-6 nm particles. The size of the noble metal particles increased with higher loadings of gold and particularly silver. Both scanning transmission electron microscopy (STEM) combined with energy dispersive X-ray spectroscopy (EDXS) and X-ray absorption spectroscopy (XAS) studies proved the formation of mixed Au-Ag particles. In case of 1% Au-1% Ag/SiO 2 , TEM combined with electron spectroscopic imaging (ESI) using an imaging filter could be used in addition to prove the presence of silver and gold in the same noble metal particle. CO oxidation in the presence of hydrogen was chosen as a test reaction sensitive to small gold particles. Both the influence of the particle size and the alloying of gold and silver were reflected in the CO oxidation activity

Cooperative Learning in Accounting Classes: A Case Study.

Science.gov (United States)

Joyce, William B.

1999-01-01

Accounting student teams worked cooperatively on homework, problem solving, and test preparation. Group study helped retention, especially when interdependence was rewarded. Although they enjoyed cooperative learning, most students preferred individual study. (SK)

Objectivist case study research

DEFF Research Database (Denmark)

Ridder, Hanne Mette Ochsner; Fachner, Jörg

2016-01-01

be achieved through the use of objectivist case study research. The strength of the case study design is that it allows for uncovering or suggesting causal relationships in real-life settings through an intensive and rich collection of data. According to Hilliard (1993), the opposite applies for extensive......In order to comprehend the impact of music therapy or music therapy processes, a researcher might look for an approach where the topic under investigation can be understood within a broader context. This calls for a rich inclusion of data and consequently a limited number of participants and may...... designs, in which a small amount of data is gathered on a large number of subjects. With the richness of data, the intensive design is ―the primary pragmatic reason for engaging in single-case or small N research‖ (p. 374) and for working from an idiographic rather than a nomothetic perspective....

Methodology Series Module 2: Case-control Studies.

Science.gov (United States)

Setia, Maninder Singh

2016-01-01

Case-Control study design is a type of observational study. In this design, participants are selected for the study based on their outcome status. Thus, some participants have the outcome of interest (referred to as cases), whereas others do not have the outcome of interest (referred to as controls). The investigator then assesses the exposure in both these groups. The investigator should define the cases as specifically as possible. Sometimes, definition of a disease may be based on multiple criteria; thus, all these points should be explicitly stated in case definition. An important aspect of selecting a control is that they should be from the same 'study base' as that of the cases. We can select controls from a variety of groups. Some of them are: General population; relatives or friends; and hospital patients. Matching is often used in case-control control studies to ensure that the cases and controls are similar in certain characteristics, and it is a useful technique to increase the efficiency of the study. Case-Control studies can usually be conducted relatively faster and are inexpensive - particularly when compared with cohort studies (prospective). It is useful to study rare outcomes and outcomes with long latent periods. This design is not very useful to study rare exposures. Furthermore, they may also be prone to certain biases - selection bias and recall bias.

Sudden onset Oculo-cardiac Reflex post-traumatic eye injury in PNG: a case study and discussion.

Science.gov (United States)

Grogan, Aaron D

2014-08-01

This case study examines the onset of traumatic OCR--Oculo-cardiac Reflex--in the remote southern highlands of PNG. The spontaneous occurrence of OCR post-trauma in the clinical setting leads to sudden onset bradycardia, nausea and hypotension, resulting in cardiovascular compromise and deteriorating clinical conditions. Initial recognition of the characteristics of OCR will prepare the clinician to deal with the sequence of events that arise post the reflex initiation. Copyright © 2014 College of Emergency Nursing Australasia Ltd. Published by Elsevier Ltd. All rights reserved.

[Study on preparation and physicochemical properties of surface modified sintered bone].

Science.gov (United States)

Li, Jingfeng; Zheng, Qixin; Guo, Xiaodong

2012-06-01

The aim of this study is to investigate a new method for preparing a biomimetic bone material-surface modified sintered bovine cancellous bone, and to improve its bioactivity as a tissue engineering bone. The prepared sintered bovine cancellous bones with the same size were randomly divided into two groups, immersing in 1 and 1. 5 times simulated body fluid (SBF), respectively. The three time periods of soak time were 7, 14, and 21 days. After sintered bone was dried, the surface morphology of sintered bone and surface mineralization composition were observed under scanning electron microscopy (SEM). By comparing the effect of surface modification of sintered bone materials, we chose the most ideal material and studied its pore size, the rate of the porosity, the compress and bend intensity. And then the material and the sintered bone material without surface modification were compared. The study indicated that sintered bone material immersed in SBF (1.5 times) for 14 days showed the best effect of surface modification, retaining the original physico-chemical properties of sintered bone.

Catalog of NASA-Related Case Studies

Data.gov (United States)

National Aeronautics and Space Administration — The OCKO has developed over 50 case studies to enhance learning at workshops, training, retreats and conferences. Case studies make mission knowledge attractive and...

Preparing for retirement - new seminars

CERN Multimedia

Human Resources Department

2015-01-01

We would like to take the opportunity to inform you about a new programme related to retirement, organised by the Human Resources Department. Retirement marks the end of a career and the start of a new chapter in life.  In all cases, being well-informed and prepared is necessary to cope successfully with this transition. The programme has been developed for staff members and consists of two seminars: Leaving CERN (half day seminar): short presentations by internal speakers, focusing on what options CERN offers at the end of your career: organised once per year, next session scheduled on 24 November 2015, in the afternoon, enrolment and more information on Indico.   Preparation for retirement (2-day seminar): interactive workshop (in small groups) delivered by external experts, focusing on how to prepare psychologically as well as practically to cope with all the changes retirement brings: organised regularly in 2016, in English or ...

Erythema multiforme-like eruption from a slimming drug preparation cutaneous adverse drug reaction

Directory of Open Access Journals (Sweden)

Linda Tognetti

2011-01-01

Full Text Available We report a case of a 34-year-old woman presenting with an erythema multiforme (EM-like eruption. Lesions developed after a 12-day treatment with a slimming drug preparation (food integrator with thermogenic activity and a herbal remedy (pilosella tincture. Serological investigations excluded viral or bacterial infections. Patch testing with galenic preparations of both drugs demonstrated sensitization to the slimming drug preparation. According to literature reports and immune-chemical properties, those components that are likely to have triggered the skin eruption are clorazepate dipotassium and theobromine. Their interaction with other two constituents such as pseudoephedrine hydrochloride and dehydrocholic acid may have caused the adverse reaction by means of a summation effect. There are no reports specifically about EM caused by a slimming drug preparation and no studies have identified thermogenic pills as cause of EM/EM-like eruption. Weight-loss compounds in slimming preparations should be kept in mind as a possible cause of drug-induced EM-like eruption.

The effect of secondary school study skills preparation on first-year university achievement

NARCIS (Netherlands)

Jansen, Ellen P. W. A.; Suhre, Cor J. M.

2010-01-01

Although many studies have revealed the importance of study skills for students' first-year performance and college retention, the extent of the impact of study skills preparation on students' academic achievement is less clear. This paper explores the impact of pre-university study skills

Applying Value Stream Mapping Technique for Production Improvement in a Manufacturing Company: A Case Study

Science.gov (United States)

Jeyaraj, K. L.; Muralidharan, C.; Mahalingam, R.; Deshmukh, S. G.

2013-01-01

The purpose of this paper is to explain how value stream mapping (VSM) is helpful in lean implementation and to develop the road map to tackle improvement areas to bridge the gap between the existing state and the proposed state of a manufacturing firm. Through this case study, the existing stage of manufacturing is mapped with the help of VSM process symbols and the biggest improvement areas like excessive TAKT time, production, and lead time are identified. Some modifications in current state map are suggested and with these modifications future state map is prepared. Further TAKT time is calculated to set the pace of production processes. This paper compares the current state and future state of a manufacturing firm and witnessed 20 % reduction in TAKT time, 22.5 % reduction in processing time, 4.8 % reduction in lead time, 20 % improvement in production, 9 % improvement in machine utilization, 7 % improvement in man power utilization, objective improvement in workers skill level, and no change in the product and semi finished product inventory level. The findings are limited due to the focused nature of the case study. This case study shows that VSM is a powerful tool for lean implementation and allows the industry to understand and continuously improve towards lean manufacturing.

Cases as Shared Inquiry: A Dialogical Model of Teacher Preparation.

Science.gov (United States)

Harrington, Helen L.; Garrison, James W.

1992-01-01

A dialogical model is proposed for connecting theory to practice in teacher education by conceiving of cases from case-based pedagogy as problems that initiate shared inquiry. Cases with genuine cognitive and axiological content can initiate self-directed, student-centered inquiry while building democratic dialogical communities. (SLD)

Autism Between the PhD Student and the Promotor. A Case Study

Directory of Open Access Journals (Sweden)

Perkowski Maciej

2017-12-01

Full Text Available Contemporary societies struggle with the problem of education being inadequate to the reality. The crisis (and, consequently, the deficit of authorities is present in all levels of education. It seems that the classical vertical mechanism “student-master” should experience a renaissance. Instead of theoretical argumentation, it is worth learning about the case of a particular relationship – between a doctoral student who is a non-speaking autistic person and the promotor who tries to oppose it constructively. Both lawyers (as the cooperation is currently taking place in doctoral law studies apart from the preparation of the dissertation, are experimenting methodologically, entering the “student-master” relationship with mutual benefit. They are subject to ongoing verification in this area – both domestic and foreign.

A Case Study of True and Fair View Override in Financial Reporting

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Ho Horace

2016-12-01

Full Text Available This paper documents a case study of true and fair view override in financial reporting by a multinational firm subject to International Financial Reporting Standards (IFRSs. The 2009 Interim Report of HSBC Holdings plc states that HSBC departed from the requirements of IAS 32 Financial Instruments: Presentation (IAS 32. Notwithstanding its noncompliance with the IFRSs, HSBC (2009 concluded that “the interim consolidated financial statements prepared on this basis presented fairly, and gave a true and fair view of the Group’s financial position, financial performance and cash flows” (p. 2. The purpose of this paper is to evaluate critically the accounting treatment in light of the relevant requirements of the IFRSs and the implications for professional accounting standards arising from this departure.

Progress of studies on preparation of TiO2 photocatalysts with sol-gel auto igniting synthesis

Science.gov (United States)

Wu, Di; Shi, Zaifeng; Zhang, Xiaopeng; Xinghui, Wu

2017-11-01

In this article, influencing factors on the kinetics of the process of Sol-gel Auto igniting Synthesis (SAS) which is an advanced technology for preparing nanometer particles of inorganic materials were reviewed. The studies on preparing of nanometer TiO2 photocatalysts with SAS were focused. It was concluded that SAS will play an important role in practical preparing of high-pure nanometer TiO2 powder, and as a technical support, preparation of titania TiO2 from titanic iron ore with SAS is feasible and practicable.

Preparation and Biological Study of (68)Ga-DOTA-alendronate.

Science.gov (United States)

Fakhari, Ashraf; Jalilian, Amir R; Johari-Daha, Fariba; Shafiee-Ardestani, Mehdi; Khalaj, Ali

2016-01-01

In line with previous research on the development of conjugated bisphosphonate ligands as new bone-avid agents, in this study, DOTA-conjugated alendronate (DOTA-ALN) was synthesized and evaluated after labeling with gallium-68 ((68)Ga). DOTA-ALN was synthesized and characterized, followed by (68)Ga-DOTA-ALN preparation, using DOTA-ALN and (68)GaCl3 (pH: 4-5) at 92-95° C for 10 min. Stability tests, hydroxyapatite assay, partition coefficient calculation, biodistribution studies, and imaging were performed on the developed agent in normal rats. The complex was prepared with high radiochemical purity (>99% as depicted by radio thin-layer chromatography; specific activity: 310-320 GBq/mmol) after solid phase purification and was stabilized for up to 90 min with a log P value of -2.91. Maximum ligand binding (65%) was observed in the presence of 50 mg of hydroxyapatite; a major portion of the activity was excreted through the kidneys. With the exception of excretory organs, gastrointestinal tract organs, including the liver, intestine, and colon, showed significant uptake; however, the bone uptake was low (<1%) at 30 min after the injection. The data were also confirmed by sequential imaging at 30-90 min following the intravenous injection. The high solubility and anionic properties of the complex led to major renal excretion and low hydroxyapatite uptake; therefore, the complex failed to demonstrate bone imaging behaviors.

Fish intake and ovarian cancer risk: a meta-analysis of 15 case-control and cohort studies.

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Pei-yue Jiang

Full Text Available BACKGROUND: Previous epidemiological studies have shown that fish consumption may modify the risk of ovarian cancer. However, these studies yielded controversial results. The present meta-analysis was undertaken to evaluate the relationship between fish intake and ovarian cancer risk. METHODS: A literature search was carried out using Pubmed, Embase, and Cochrane Library Central database for all relevant studies up to August 2013. We pooled the relative risks (RR from individual studies using fixed-effect or random-effect model, and carried out heterogeneity and publication bias analyses. RESULTS: A total of 15 (ten case-control, and five cohort studies were included in the present meta-analysis, representing data for 889,033 female subjects and 6,087 ovarian cancer cases. We found that total fish intake was not significantly associated with the risk of ovarian cancer among cohort studies (RR = 1.04 95% CI [0.89, 1.22] as well as case-control studies (RR = 0.90, 95% CI [0.73,1.12]. There was no evidence of publication bias as suggested by Begg's test (P = 0.55 and Egger's test(P = 0.29. CONCLUSIONS: The present meta-analysis showed that total fish consumption was not significantly associated with the risk of ovarian cancer. Further analysis on different fish species and food preparation methods should be conducted in future studies.

Case Study: Let's Get Personal--Putting Personality into Your Cases

Science.gov (United States)

Herreid, Clyde Freeman

2017-01-01

In this case study, the subject for discussion is the need to use teaching notes in order to add personality to case studies. Personality, it is said, is more important than policy, than demographics, than finances, or amorous peccadillos. Personality is essential. It is the interaction of people that capture our interest, yet, the question is…

Case Study of 'moral injury' : Format Dutch Case Studies Project

NARCIS (Netherlands)

Korver, Sjaak; Walton, Martin N.; van Loenen, Guus

2017-01-01

The case study ‘Moral Injury’ traces care provided by a chaplain in a mental health institution to a former military marksman named Hans. Hans was in care at a specialized unit for military veterans with traumas. He sought contact with a chaplain “to set things right with God” and wanted the

Comparative study of ZnO thin films prepared by different sol-gel route

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F Esmaieli Ghodsi

2012-03-01

Full Text Available   Retraction Notice    The paper "Comparative study of ZnO thin films prepared by different sol-gel route" by H. Absalan and F. E. Ghodsi, which appeared in Iranian Journal of Physics Research, Vol. 11, No. 4, 423-428 (in Farsi is translation of the paper "Comparative Study of ZnO Thin Films Prepared by Different Sol-Gel Route" by F. E. Ghodsi and H. Absalan, which appeared in ACTA PHYSICA POLONICA A, Vol 118 (2010 (in English and for this reason is retracted from this journal.The corresponding author  (and also the first author is the only responsible person for this action.   

Study of structural relaxation in amorphous alloys prepared by sputtering

International Nuclear Information System (INIS)

Habibi, S.; Banaee, N.; Majidy, S.

2004-01-01

Full text: We have prepared amorphous alloy of Al x Cu 1-x (with X= 93, 90, 80, 70, 30) using sputtering system. The rate of growth was 0.7 nm/sec. X-ray diffractometer was used to conform the amorphous nature of the prepared specimens. High temperature annealing can change amorphous to crystalline structure, while low temperature annealing may transform amorphous state to a more stable amorphous state via structural relaxation of the specimen and enhancing the properties of the alloys, such as mechanical ductility etc. Here we have annealed the alloys at temperatures 100, 150, 200, 250, 300 and 350 C for 1 hour. We observed that microhardness of the specimen increases with annealing and gets maximum value at 300 C. Our XRD experiments and also earlier Moessbauer studies show that while the average interatomic distances reduces due to annealing, structure remains amorphous

NATO Advanced Study Institute on Preparation and Properties of Stereoregular Polymers

CERN Document Server

Ciardelli, Francesco

1980-01-01

This book contains the texts of the main lectures presented at the NATO Advanced Studies Institute on "Advances in Preparation and Properties of Stereoregular Polymers" held at Tirrenia near Pisa, Italy, from October 3 to 14, 1978. A few contributed papers have also been included because they were concerned with topics not included in the main lectures. The primary objective of the Institute was to assist in the further development of stereoregular polymers because of the ever-increasing demand for new products with exceptional chemical and physical properties. This need has reawakened interest in the field. Indeed there is now a rapidly increasing activity in the study of stereoregular polymerization and the preparation of structurally-ordered polymers with the aim of achieving apprecia­ ble improvements in existing polymeric materials through new developments in synthesis and properties as well as in discovering new polymeric structures. In order to achieve these objectives, a broad interdiscipli­ nary co...

Mentor preparation: A qualitative study of STEM master teacher professional development

Science.gov (United States)

Click-Cuellar, Heather Lynn

The No Child Left Behind Act of 2001 has required districts to staff all classrooms with highly qualified teachers. Yet, retaining certified teachers in the profession has been a national concern, especially among new teachers who leave at alarming rates within their first three years. This comes at a heavy cost to districts financially and in trying to maintain highly qualified status, but also to the continuity and effective education of students. Mentoring has been identified by many researchers as a plausible solution to reducing attrition rates for beginning teachers. In this dissertation, I conducted qualitative research to explore and understand the perceptions of STEM (science, technology, engineering, and mathematics) Master Teachers' mentoring professional development in the context of the Master Teacher Academies program situated at Desert State University (pseudonym), a large institution located on the Texas-Mexico border. Additionally, I examined the reported teaching self-efficacy of STEM Master Teachers (mentors), as well as that of their novice teachers (mentees). Another purpose of the study was to investigate the forms and elements of interactions between these mentors and their mentees. Participants of this study were Texas certified Master Mathematics or Master Science Teachers, and their novice mathematics or science teacher mentees; all of whom teach in a high need U.S. Mexico border city school district serving a student population that is over 93% Hispanic. A grounded theory approach was used in examining and analyzing mentor and mentee perceptions and experiences through case studies. A constructivist framework was utilized to derive findings from interviews and the review of documents and contribute a diverse context and population to the literature. The study reveals conclusions and recommendations that will benefit educators, universities, school districts, and policy makers in regard to teacher mentor preparation.

FISHprep: A Novel Integrated Device for Metaphase FISH Sample Preparation

DEFF Research Database (Denmark)

Shah, Pranjul Jaykumar; Vedarethinam, Indumathi; Kwasny, Dorota

2011-01-01

We present a novel integrated device for preparing metaphase chromosomes spread slides (FISHprep). The quality of cytogenetic analysis from patient samples greatly relies on the efficiency of sample pre-treatment and/or slide preparation. In cytogenetic slide preparation, cell cultures...... are routinely used to process samples (for culture, arrest and fixation of cells) and/or to expand limited amount of samples (in case of prenatal diagnostics). Arguably, this expansion and other sample pretreatments form the longest part of the entire diagnostic protocols spanning over 3–4 days. We present here...... with minimal handling for metaphase FISH slide preparation....

Sample preparation for large-scale bioanalytical studies based on liquid chromatographic techniques.

Science.gov (United States)

Medvedovici, Andrei; Bacalum, Elena; David, Victor

2018-01-01

Quality of the analytical data obtained for large-scale and long term bioanalytical studies based on liquid chromatography depends on a number of experimental factors including the choice of sample preparation method. This review discusses this tedious part of bioanalytical studies, applied to large-scale samples and using liquid chromatography coupled with different detector types as core analytical technique. The main sample preparation methods included in this paper are protein precipitation, liquid-liquid extraction, solid-phase extraction, derivatization and their versions. They are discussed by analytical performances, fields of applications, advantages and disadvantages. The cited literature covers mainly the analytical achievements during the last decade, although several previous papers became more valuable in time and they are included in this review. Copyright © 2017 John Wiley & Sons, Ltd.

Home food preparation practices, experiences and perceptions: A qualitative interview study with photo-elicitation.

Directory of Open Access Journals (Sweden)

Susanna Mills

Full Text Available Food-related choices have an important impact on health. Food preparation methods may be linked to diet and health benefits. However, the factors influencing people's food choices, and how they are shaped by food preparation experiences, are still not fully understood. We aimed to study home food preparation practices, experiences and perceptions amongst adults in North East England. A matrix was used to purposively sample participants with diverse socio-demographic characteristics. Participants developed photographic food diaries that were used as prompts during semi-structured interviews. Data were analysed using the Framework Method. Interviews were conducted with 18 adults (five men and 13 women, aged approximately 20 to 80 years, to reach data saturation. Participants' practices varied widely, from reliance on pre-prepared foods, to preparing complex meals entirely from basic ingredients. Key themes emerged regarding the cook (identity, the task (process of cooking, and the context (situational drivers. Resources, in terms of time, money and facilities, were also underpinning influences on food preparation. Participants' practices were determined by both personal motivations to cook, and the influence of others, and generally reflected compromises between varied competing demands and challenges in life. Most people appeared to be overall content with their food preparation behaviour, though ideally aspired to cook more frequently, using basic ingredients. This often seemed to be driven by social desirability. Home food preparation is complex, with heterogeneous practices, experiences and perceptions both between individuals and within the same individual over time, according to shifting priorities and circumstances. Generalisability of these findings may be limited by the regional participant sample; however the results support and build upon previous research. Focussing interventions on life transition points at which priorities and

Home food preparation practices, experiences and perceptions: A qualitative interview study with photo-elicitation

Science.gov (United States)

White, Martin; Wrieden, Wendy; Brown, Heather; Stead, Martine; Adams, Jean

2017-01-01

Food-related choices have an important impact on health. Food preparation methods may be linked to diet and health benefits. However, the factors influencing people’s food choices, and how they are shaped by food preparation experiences, are still not fully understood. We aimed to study home food preparation practices, experiences and perceptions amongst adults in North East England. A matrix was used to purposively sample participants with diverse socio-demographic characteristics. Participants developed photographic food diaries that were used as prompts during semi-structured interviews. Data were analysed using the Framework Method. Interviews were conducted with 18 adults (five men and 13 women), aged approximately 20 to 80 years, to reach data saturation. Participants’ practices varied widely, from reliance on pre-prepared foods, to preparing complex meals entirely from basic ingredients. Key themes emerged regarding the cook (identity), the task (process of cooking), and the context (situational drivers). Resources, in terms of time, money and facilities, were also underpinning influences on food preparation. Participants’ practices were determined by both personal motivations to cook, and the influence of others, and generally reflected compromises between varied competing demands and challenges in life. Most people appeared to be overall content with their food preparation behaviour, though ideally aspired to cook more frequently, using basic ingredients. This often seemed to be driven by social desirability. Home food preparation is complex, with heterogeneous practices, experiences and perceptions both between individuals and within the same individual over time, according to shifting priorities and circumstances. Generalisability of these findings may be limited by the regional participant sample; however the results support and build upon previous research. Focussing interventions on life transition points at which priorities and circumstances

Home food preparation practices, experiences and perceptions: A qualitative interview study with photo-elicitation.

Science.gov (United States)

Mills, Susanna; White, Martin; Wrieden, Wendy; Brown, Heather; Stead, Martine; Adams, Jean

2017-01-01

Food-related choices have an important impact on health. Food preparation methods may be linked to diet and health benefits. However, the factors influencing people's food choices, and how they are shaped by food preparation experiences, are still not fully understood. We aimed to study home food preparation practices, experiences and perceptions amongst adults in North East England. A matrix was used to purposively sample participants with diverse socio-demographic characteristics. Participants developed photographic food diaries that were used as prompts during semi-structured interviews. Data were analysed using the Framework Method. Interviews were conducted with 18 adults (five men and 13 women), aged approximately 20 to 80 years, to reach data saturation. Participants' practices varied widely, from reliance on pre-prepared foods, to preparing complex meals entirely from basic ingredients. Key themes emerged regarding the cook (identity), the task (process of cooking), and the context (situational drivers). Resources, in terms of time, money and facilities, were also underpinning influences on food preparation. Participants' practices were determined by both personal motivations to cook, and the influence of others, and generally reflected compromises between varied competing demands and challenges in life. Most people appeared to be overall content with their food preparation behaviour, though ideally aspired to cook more frequently, using basic ingredients. This often seemed to be driven by social desirability. Home food preparation is complex, with heterogeneous practices, experiences and perceptions both between individuals and within the same individual over time, according to shifting priorities and circumstances. Generalisability of these findings may be limited by the regional participant sample; however the results support and build upon previous research. Focussing interventions on life transition points at which priorities and circumstances change

Casing Out Evaluation: Expanding Student Interest in Program Evaluation through Case Competitions.

Science.gov (United States)

Obrecht, Michael; Porteous, Nancy; Haddock, Blair

1998-01-01

Describes the authors' experiences in organizing bilingual evaluation case competitions for the National Capital Chapter of the Canadian Evaluation Society for three years. Competition structure, eligibility, judging, contestant recruiting, and preparing cases are outlined. (SLD)

Schematic representation of case study research designs.

Science.gov (United States)

Rosenberg, John P; Yates, Patsy M

2007-11-01

The paper is a report of a study to demonstrate how the use of schematics can provide procedural clarity and promote rigour in the conduct of case study research. Case study research is a methodologically flexible approach to research design that focuses on a particular case - whether an individual, a collective or a phenomenon of interest. It is known as the 'study of the particular' for its thorough investigation of particular, real-life situations and is gaining increased attention in nursing and social research. However, the methodological flexibility it offers can leave the novice researcher uncertain of suitable procedural steps required to ensure methodological rigour. This article provides a real example of a case study research design that utilizes schematic representation drawn from a doctoral study of the integration of health promotion principles and practices into a palliative care organization. The issues discussed are: (1) the definition and application of case study research design; (2) the application of schematics in research; (3) the procedural steps and their contribution to the maintenance of rigour; and (4) the benefits and risks of schematics in case study research. The inclusion of visual representations of design with accompanying explanatory text is recommended in reporting case study research methods.

The Impact of Customer Relationship Marketing by Aqaba Economic Zone "A Case Study of Five Stars Hotels"

OpenAIRE

Omar A.A. Jawabreh

2014-01-01

This paper is an attempt to find the variables factors that Influence the impact of customer relationship marketing by Aqaba Economic Zone "A case study of Five Stars Hotels. In this research, the Statistical Package for the Social Sciences (SPSS) was used for data entry, as well as for examining the data later. Data preparation was the initial step, which aimed to convert raw data into a more structured format that is more appropriate for analysis. The hotel use specialized Customer Relation...

Are elementary school teachers prepared to tackle bullying? : A pilot study

NARCIS (Netherlands)

Oldenburg, Beau; Bosman, Rie; Veenstra, Rene

The aim of this pilot study was to investigate to what extent elementary school teachers were prepared to tackle bullying. Interview data from 22 Dutch elementary school teachers (M age=43.3, 18 classrooms in eight schools) were combined with survey data from 373 students of these teachers (M

Peace Corps Water/Sanitation Case Studies and Analyses. Appropriate Technologies for Development. Case Study CS-4.

Science.gov (United States)

Talbert, Diana E., Comp.

This document provides an overview of Peace Corps water and sanitation activities, five case studies (Thailand, Yemen, Paraguay, Sierra Leone, and Togo), programming guidelines, and training information. Each case study includes: (1) background information on the country's geography, population, and economics; (2) information on the country's…

Preparation and reactivity studies of maleimidophenyl glycidylether with amines

Directory of Open Access Journals (Sweden)

B. Lakshmi

2011-04-01

Full Text Available The hybrid thermosetting maleimido epoxy compound 4-(N-maleimidophenyl glycidylether (N-MPGE was prepared by reacting N-(4-hydroxyphenyl maleimide (HPM with epichlorohydrin by using benzyltrimethylammonium chloride as a catalyst. The resulting compound possessed both the oxirane ring and maleimide group. The curing reaction of N-MPGE with amines as curing agents such as tetraethylenepentamine (TEPA, bishexamethylenetriamine (BHMT, 2-methyl pentamethylenediamine (2-MPMDA and 2,2,4-trimethy diamines (2,2,4-TMDA was studied. The cured samples exhibited good thermal stability and excellent chemical (acid/alkali/solvent and water absorption resistance. Morphological studies by the SEM technique further confirmed the phase homogeneity network of the cured systems.

Teaching microbiological food safety through case studies

Directory of Open Access Journals (Sweden)

Florence Dubois-Brissonnet

2015-10-01

Full Text Available Higher education students usually ask for more training based on case studies. This was addressed by designing a specific food safety module (24 hours in which students were shown how to predict microbiological risks in food products i.e. they were asked to determine product shelf-life according to product formulation, preservation methods and consumption habits using predictive microbiology tools. Working groups of four students first identified the main microbiological hazards associated with a specific product. To perform this task, they were given several documents including guides for good hygiene practices, reviews on microbiological hazards in the food sector, flow sheets, etc…  After three-hours of work, the working groups prepared and gave an oral presentation in front of their classmates and professors. This raised comments and discussion that allowed students to adjust their conclusions before beginning the next step of their work. This second step consisted in the evaluation of the safety risk associated with the two major microbiological hazards of the product studied, using predictive microbiology. Students then attended a general lecture on the different tools of predictive microbiology and tutorials (6 hours that made them familiar with the modelling of bacterial growth or inactivation. They applied these tools (9 hours to predict the shelf-life of the studied product according to various scenarios of preservation (refrigeration, water activity, concentration of salt or acid, modified atmosphere, etc… and/or consumption procedures (cooking. The module was concluded by oral presentations of each working group and included student evaluation (3 hours.

Data preparation techniques for a perinatal psychiatric study based on linked data.

Science.gov (United States)

Xu, Fenglian; Hilder, Lisa; Austin, Marie-Paule; Sullivan, Elizabeth A

2012-06-08

In recent years there has been an increase in the use of population-based linked data. However, there is little literature that describes the method of linked data preparation. This paper describes the method for merging data, calculating the statistical variable (SV), recoding psychiatric diagnoses and summarizing hospital admissions for a perinatal psychiatric study. The data preparation techniques described in this paper are based on linked birth data from the New South Wales (NSW) Midwives Data Collection (MDC), the Register of Congenital Conditions (RCC), the Admitted Patient Data Collection (APDC) and the Pharmaceutical Drugs of Addiction System (PHDAS). The master dataset is the meaningfully linked data which include all or major study data collections. The master dataset can be used to improve the data quality, calculate the SV and can be tailored for different analyses. To identify hospital admissions in the periods before pregnancy, during pregnancy and after birth, a statistical variable of time interval (SVTI) needs to be calculated. The methods and SPSS syntax for building a master dataset, calculating the SVTI, recoding the principal diagnoses of mental illness and summarizing hospital admissions are described. Linked data preparation, including building the master dataset and calculating the SV, can improve data quality and enhance data function.

Five case studies of multifamily weatherization programs

Energy Technology Data Exchange (ETDEWEB)

Kinney, L; Wilson, T.; Lewis, G. [Synertech Systems Corp. (United States); MacDonald, M. [Oak Ridge National Lab., TN (United States)

1997-12-31

The multifamily case studies that are the subject of this report were conducted to provide a better understanding of the approach taken by program operators in weatherizing large buildings. Because of significant variations in building construction and energy systems across the country, five states were selected based on their high level of multifamily weatherization. This report summarizes findings from case studies conducted by multifamily weatherization operations in five cities. The case studies were conducted between January and November 1994. Each of the case studies involved extensive interviews with the staff of weatherization subgrantees conducting multifamily weatherization, the inspection of 4 to 12 buildings weatherized between 1991 and 1993, and the analysis of savings and costs. The case studies focused on innovative techniques which appear to work well.

Case study on the feasibility of small and medium nuclear power plants in Egypt

International Nuclear Information System (INIS)

1994-04-01

The IAEA agreed to co-operate with the Arab Republic of Egypt in performing a case study on the feasibility of small and medium power reactors (SMPRs) as a technical assistance project. The major objective of this study is to examine the feasibility of SMPRs to supply a portion of the future electrical energy requirements in the long term power programme of Egypt. The IAEA is grateful to all who provided information and assisted in the drafting and review of the report, in particular to the Advisory Group which performed the study in a co-operative effort. It is hoped that the report will meet the interests of policy makers, managers, engineers and economists in Member States, particularly in developing countries, and that it will provide a useful basis for specific studies to prepare decisions on SMPR projects. Refs, figs and tabs

Commonly used bowel preparations have significant and different effects upon cell proliferation in the colon: a pilot study

Directory of Open Access Journals (Sweden)

Riley Stuart A

2008-11-01

Full Text Available Abstract Background Markers of crypt cell proliferation are frequently employed in studies of the impact of genetic and exogenous factors on human colonic physiology. Human studies often rely on the assessment of tissue acquired at endoscopy. Modulation of cell proliferation by bowel preparation with oral laxatives may confound the findings of such studies, but there is little data on the impact of commonly used bowel preparations on markers of cell proliferation. Methods Crypt length, crypt cellularity and crypt cell proliferation were assessed in biopsies acquired after preparation with either Klean-Prep or Picolax. Crypt cell proliferation was assessed by whole-mount mitotic figure count, and by two different immunohistochemical (IHC labelling methods (Ki-67 and pHH3. Subsequent biopsies were obtained from the same patients without bowel preparation and similarly assessed. Parameters were compared between groups using analysis of variance and paired t-tests. Results There were significant differences in labelling indices (LI between biopsies taken after Klean-prep and those taken after Picolax preparation, for both Ki67 (p = 0.019 and pHH3 (p = 0.017. A similar trend was seen for whole-mount mitotic figure counts. Suppression or elevation of proliferation parameters by bowel preparation may mask any effect due to an intervention or disease. Conclusion Commonly used bowel preparations may have significant and different effects on crypt cell proliferation. This should be taken into account when designing studies and when considering the findings of existing studies.

Entrepreneurial Attitudes and Behaviors that Can Help Prepare Successful Change-Agents in Education

Science.gov (United States)

Borasi, Raffaella; Finnigan, Kara

2010-01-01

This article explores how the preparation of educators committed to improving education can capitalize on entrepreneurship when broadly defined as "transforming ideas into enterprises that generate economic, intellectual and/or social value." The article reports on the case-studies of six educators who have been successful change-agents in a…

Atomic Force Microscopy Techniques for Nanomechanical Characterization: A Polymeric Case Study

Science.gov (United States)

Reggente, Melania; Rossi, Marco; Angeloni, Livia; Tamburri, Emanuela; Lucci, Massimiliano; Davoli, Ivan; Terranova, Maria Letizia; Passeri, Daniele

2015-04-01

Atomic force microscopy (AFM) is a versatile tool to perform mechanical characterization of surface samples at the nanoscale. In this work, we review two of such methods, namely contact resonance AFM (CR-AFM) and torsional harmonics AFM (TH-AFM). First, such techniques are illustrated and their applicability on materials with elastic moduli in different ranges are discussed, together with their main advantages and limitations. Then, a case study is presented in which we report the mechanical characterization using both CR-AFM and TH-AFM of polyaniline and polyaniniline doped with nanodiamond particles tablets prepared by a pressing process. We determined the indentation modulus values of their surfaces, which were found in fairly good agreement, thus demonstrating the accuracy of the techniques. Finally, the determined surface elastic moduli have been compared with the bulk ones measured through standard indentation testing.

An Analytical Study of the Preparation of Community College Physics Teachers.

Science.gov (United States)

Ohm, Kenneth Ronald

Reported is a study of the type and nature of course offerings, student teaching practices, internships, and industrial experiences for the purpose of developing a curriculum necessary for adequate preparation of community college physics teachers. Similar questionnaires were submitted to participants of the 1968 and 1971 summer institutes held at…

Toxic effect of Xanthium Strumarium as an herbal medicine preparation

OpenAIRE

Mofidi, Mani; Saidi, Hossein

2009-01-01

We describe the intoxication resulting from exposure of a previously healthy young woman to Xanthium Strumarium (Astraceae family) as an herbal preparation. The patient developed hepatic injury, symptomatic hypoglycemia and seizure 7 days after drinking of decocting preparation of the plant. It is different from previous reported cases because of neuropsychiatric and gradual onset of symptoms.

Summary of case studies for cooperation mechanisms

DEFF Research Database (Denmark)

Longa, Francesco Dalla; Klinge Jacobsen, Henrik; Hansen, Lise-Lotte Pade

2012-01-01

This document is a summary report highlighting the main aspect analyzed in the RES4LESS case studies. The document starts with an introductory chapter where the background that led to the selection of the case studies is outlined. In the following three chapters the case studies are presented, hi...

Implementing Product Platforms: A Case Study

DEFF Research Database (Denmark)

Nielsen, Ole Fiil; Mortensen, Niels Henrik

2006-01-01

The paper describes a case study dealing with the process of creating and implementing a product platform. The paper espessially deals with the fact that to obtain the benefits of platforms a permanent change in behaviour in product development must be ensured. This change in behaviour requires...... acceptance and approval from the organisation in general and the commitment from management to enforce agreed-upon decisions. The case study itself was performed in the Danish company LEGO Group. The case study had two objectives: To create a technical architecture and align this architecture...

Comparative study of nano copper aluminate spinel prepared by sol–gel and modified sol–gel techniques: Structural, electrical, optical and catalytic studies

International Nuclear Information System (INIS)

Kumar, R. Thinesh; Suresh, P.; Selvam, N. Clament Sagaya; Kennedy, L. John; Vijaya, J. Judith

2012-01-01

Highlights: ► A modified sol–gel method for the preparation of nano CuAl 2 O 4 spinel using ethylenediamine was studied. ► Role of ethylenediamine in enhancing the structural, electrical, optical and catalytic properties of copper aluminate is highlighted. ► Effect of preparation method on the activity and selectivity of the samples on the oxidation of benzyl alcohol by CuAl 2 O 4 is studied. - Abstract: The effect of ethylenediamine addition in the sol–gel method for the preparation of nano CuAl 2 O 4 spinel for the enhancement in their structural, electrical, optical and catalytic properties was investigated. The samples were prepared by two different methods: sol–gel and modified sol–gel technique using ethylenediamine. X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), high resolution-transmission electron microscopy (HR-TEM), energy dispersive X-ray analysis (EDX), nitrogen adsorption/desorption isotherms, temperature dependent conductance measurements, thermoelectric power (TEP) measurements and UV–visible diffuse reflectance (UV–vis-DRS) spectra were used to characterize the samples prepared. CuAl 2 O 4 prepared by modified sol–gel technique was found to possess a higher surface area, lower crystallite size, lower activation energy and high porosity than the one prepared by sol–gel method which in turn lead to the improved performance of it towards the selective oxidation of benzyl alcohol to benzaldehyde. Effect of solvent on the catalytic oxidation of benzyl alcohol by the nano CuAl 2 O 4 prepared by modified sol–gel technique was also investigated.

Location of existing Case Studies on Open Education

OpenAIRE

Burke, Siobhan

2014-01-01

Members of the Open Education Special Interest Group have collected a selection of short case studies on Open Education. View all of the case studies at http://repository.alt.ac.uk/view/divisions/CaseStudies/ Location of existing Case Studies on Open Education: The following lists aims to capture and amalgamate the various different case study sources which have been created and developed within the UK around experiences of Open Educational Resources.

Use of Powder PEG-3350 as a Sole Bowel Preparation

Science.gov (United States)

Arora, Manish

2008-01-01

Objective: To assess the efficacy of low-volume powder polyethylene glycol (PEG)-3350 as a sole bowel preparation for colonoscopy. Methods: This case series examined 245 consecutive patients (a mixture of inpatients and outpatients undergoing screening colonoscopy) at a hospital endoscopy center over a 2-year period. The patients received powder PEG-3350 in the amount of 204 g dissolved in 32 oz of water and taken in 3 divided doses 1 hour apart with 8 oz of water in between each dose. Colon preparation scores (CPS) were used to assess the quality of colon cleansing. The results obtained from the 245 patients were collated and compared to those of patients receiving sodium phosphate, the historical control. Results: The mean CPS was calculated to be 3.43, with a standard deviation of 1.12. Of the 245 patients, 92 were scored with a grade of 4, and 5 patients had incomplete colonoscopies secondary to failure of bowel preparation (CPS=0). Among the remaining patients, 22 and 26 were graded as poor (CPS=1) or fair (CPS=2) bowel preparations, respectively. Conclusion: The low-volume powder PEG-3350 formula used in our case series showed effective colon cleansing and may be considered for use as a sole bowel preparation. PMID:21960925

national Case study

African Journals Online (AJOL)

This national case study reports on the development of a national network, ... system under the new policy), tends to be limited by content on problems and ... 20 credit programme; and within two Post Graduate Certificate of Education contexts, ...... descriptive with an issues focus (empirical) towards awareness production to.

Writing case studies in information systems research

NARCIS (Netherlands)

van der Blonk, H.C.

Case study research can be reported in different ways. This paper explores the various ways in which researchers may choose to write down their case studies and then introduces a subsequent typology of writing case studies. The typology is based on a 2 x 2 matrix, resulting in four forms of writing

Studies on the preparation of Caro’s acid by ultrasonic enhanced electrochemistry

Science.gov (United States)

Li, Linbo; Yu, Zeli; Hong, Tao; Fang, Zhao; Peng, Jishi; Yang, Zhao

2017-06-01

Ultrasonic cavitation effects can generate hydroxyl radicals and high energy, which is widely applied in the field of oxidation currently. Ultrasound-enhanced electrochemical is used to prepare Caro’s acid, which improves the generate rate of Caro’s acid. In this article, the influences of ultrasonic frequency and ultrasonic power on the electrolysis voltage, electrolyte temperature, electrolyte concentration and the concentration of additive in the process of electrochemical preparation of Caro’s acid was studied. And the optimal production conditions were determined. The research results showed that ultrasonic can significantly improve the production of Caro’s acid and the product can increase by about 20 g/L under the best condition.

Nuclear characteristics of the endometrial cytology: liquid-based versus conventional preparation.

Science.gov (United States)

Norimatsu, Yoshiaki; Shigematsu, Yumie; Sakamoto, Shingo; Ohsaki, Hiroyuki; Yanoh, Kenji; Kawanishi, Namiki; Kobayashi, Tadao K

2013-02-01

The aim of this study was to assess the utility of liquid-based cytologic preparation (LP) compared with conventional preparation (CP) for the assessment of nuclear findings in endometrial glandular and stromal breakdown (EGBD) which may be misdiagnosed as carcinoma in EGBD cases. The material consists of cytologic smears including 20 cases of proliferative endometrium (PE), 20 cases of EGBD, and 20 cases of endometrioid adenocarcinoma grade1 (G1) for which histopathological diagnosis was obtained by endometrial curettage at the JA Suzuka General Hospital. Nuclear findings were examined in PE cells, EGBD-stromal cells, EGBD-metaplastic cells, and G1 cells, respectively. It was examined about the following items; (1) nuclear shape; (2) A long/minor axis ratio in cell nuclei; (3) an area of cell nuclei; (4) overlapping nuclei. Results are as follows: (1) nuclear shape; as for the reniform shape of EGBD-stromal cells and spindle shape of EGBD-metaplastic cells, the ratio of the LP method was a higher value than the CP method. (2) The long axis and area of cell nuclei; LP in all groups was a recognizable tendency for nuclear shrinkage. (3) The long/minor axis ratio in cell nuclei; only EGBD-metaplastic cells recognize a significant difference between CP and LP. (4) Overlapping nuclei; LP was a higher value in comparison with CP in the other groups except PE cells, and the degree of overlapping nuclei was enhanced about three times. Therefore, although a cell of LP has a shrinking tendency, (1) it is excellent that LP preserves a characteristic of nuclear shape than CP; (2) a cellular characteristic becomes clearer, because three-dimensional architecture of LP is preserved of than CP. As for the standard preparation method for endometrial cytology samples, we considered that a concrete introduction of the LP method poses no problems. Copyright © 2011 Wiley Periodicals, Inc.

Sample preparation techniques of biological material for isotope analysis

International Nuclear Information System (INIS)

Axmann, H.; Sebastianelli, A.; Arrillaga, J.L.

1990-01-01

Sample preparation is an essential step in all isotope-aided experiments but often it is not given enough attention. The methods of sample preparation are very important to obtain reliable and precise analytical data and for further interpretation of results. The size of a sample required for chemical analysis is usually very small (10mg-1500mg). On the other hand the amount of harvested plant material from plots in a field experiment is often bulky (several kilograms) and the entire sample is too large for processing. In addition, while approaching maturity many crops show not only differences in physical consistency but also a non-uniformity in 15 N content among plant parts, requiring a plant fractionation or separation into parts (vegetative and reproductive) e.g. shoots and spikes, in case of small grain cereals, shoots and pods in case of grain legumes and tops and roots or beets (including crown) in case of sugar beet, etc. In any case the ultimate goal of these procedures is to obtain representative subsample harvested from greenhouse or field experiments for chemical analysis. Before harvesting an isotopic-aided experiment the method of sampling has to be selected. It should be based on the type of information required in relation to the objectives of the research and the availability of resources (staff, sample preparation equipment, analytical facilities, chemicals and supplies, etc.). 10 refs, 3 figs, 3 tabs

Comparison of different procedures to prepare platelet-rich plasma for studies of platelet aggregation by light transmission aggregometry.

Science.gov (United States)

Femia, Eti Alessandra; Pugliano, Mariateresa; Podda, Gianmarco; Cattaneo, Marco

2012-01-01

Light transmission aggregometry (LTA), the gold standard for the study of patients with defects of platelet function, is a poorly standardized technique. The guidelines that have been produced so far are largely based on consensus of experts, due to the absence of studies directly comparing different procedures. Therefore, ad hoc studies are needed to gather scientific evidence on how to choose the most appropriate procedures for LTA measurement. In this study, we aimed at evaluating the most appropriate conditions for preparing samples of platelet-rich plasma (PRP) for studies of platelet aggregation by LTA. Citrate-anticoagulated blood from 32 individuals was centrifuged at 150, 200, 250 or 300×g at room temperature for 10 min. Red blood cells contamination was highest in PRP prepared at 150×g; mean platelet volume (MPV) was lowest in PRP prepared at 300×g. The extent of platelet aggregation measured by LTA was lower and more variable in PRP prepared at 300×g. Therefore, centrifugation of blood at 200×g or 250×g for 10 min appears to be the best condition for preparing PRP for LTA studies.

Studies on the lanthanum arsenate ion-exchanger: preparation, physicochemical properties and applications

International Nuclear Information System (INIS)

Mukherjee, A.K.; Mandal, S.K.

1984-01-01

The cation-exchange behaviour of lanthanum arsenate has been studied. This paper reports the preparation and physicochemical properties of the exchanger. Its analytical utility is compared with that of other arsenate exchangers. Some practical analytical applications are described. (author)

Relationship between the Apical Preparation Diameter and the Apical Seal: An In Vitro Study

Directory of Open Access Journals (Sweden)

Kaoutar Laslami

2018-01-01

Full Text Available Objectives. The aim of the study is to define the relationship between the apical preparation diameter and the apical sealing ability to highlight the importance of the preservation of the diameter and the original position of the apical foramen. Materials and Methods. 50 extracted maxillary incisors were randomly allocated into three groups of 15 teeth each (n = 15 according to the apical preparation size: Group 1: finishing file F1 corresponding to size 20 reached the working length (ProTaper Universal system Dentsply®; Group 2: prepared up to size 30 corresponding to finishing file F30; Group 3: prepared up to size 50 corresponding to finishing file F5. Five teeth were assigned to positive and negative control groups. After the filling of the root canals, the teeth were isolated and immersed in a dye solution, then cut longitudinally, photographed, and the dye penetration were calculated using a computer software. Results. Comparison of the three different apical preparation sizes showed no statistically significant differences regarding the apical microleakage. Conclusion. The most important value of the dye penetration was observed in the group with the largest apical diameter.

Practical single-photon-assisted remote state preparation with non-maximally entanglement

Science.gov (United States)

Wang, Dong; Huang, Ai-Jun; Sun, Wen-Yang; Shi, Jia-Dong; Ye, Liu

2016-08-01

Remote state preparation (RSP) and joint remote state preparation (JRSP) protocols for single-photon states are investigated via linear optical elements with partially entangled states. In our scheme, by choosing two-mode instances from a polarizing beam splitter, only the sender in the communication protocol needs to prepare an ancillary single-photon and operate the entanglement preparation process in order to retrieve an arbitrary single-photon state from a photon pair in partially entangled state. In the case of JRSP, i.e., a canonical model of RSP with multi-party, we consider that the information of the desired state is split into many subsets and in prior maintained by spatially separate parties. Specifically, with the assistance of a single-photon state and a three-photon entangled state, it turns out that an arbitrary single-photon state can be jointly and remotely prepared with certain probability, which is characterized by the coefficients of both the employed entangled state and the target state. Remarkably, our protocol is readily to extend to the case for RSP and JRSP of mixed states with the all optical means. Therefore, our protocol is promising for communicating among optics-based multi-node quantum networks.

The Danish National Case Study Report

DEFF Research Database (Denmark)

Brodersen, Søsser; Jørgensen, Michael Søgaard

Three case studies from Danish science shops within the environmental field are analysed with respect to societal background, interaction between the involved actors and the societal impact of the co-operation. The report is one of the seven national case study reports from the EU...

Using Case Studies in Calculus-based Physics

Science.gov (United States)

Katz, Debora M.

2006-12-01

Do your students believe that the physics only works in your classroom or laboratory? Or do they see that physics underlies their everyday experience? Case studies in physics help students connect physics principles to their everyday experience. For decades, case studies have been used to teach law, medicine and biology, but they are rarely used in physics. I am working on a calculus-based physics textbook for scientists and engineers. Case studies are woven into each chapter. Stop by and get a case study to test out in your classroom. I would love to get your feedback.

Modalities of Generalization Through Single Case Studies.

Science.gov (United States)

Zittoun, Tania

2017-06-01

The value of case studies for theory building is still doubted in psychology. The paper argues for the importance of case studies and the possibility of generalizing from these for a specific sociocultural understanding of human development. The paper first clarifies the notion of abduction within case studies, drawing on pragmatists James and Peirce and expanding it with the work of Lewin, and argues that it is the core mechanism that allows generalization from case studies. The second section presents the possibility of generalizing from individual single case studies, for which not only the subjective perspective, but also the dynamics by which the social and cultural environment guide and enable the person's development, have to be accounted for. The third section elaborates the question of institutional case studies, where the challenge is to account both for institutional dynamics, and for persons' trajectories within; this is exemplified with an ongoing study on the process of obtaining citizenship in Switzerland. The paper briefly concludes by highlighting two possible implications of the paper, one concerning the process of theoretical reasoning, the other, the fact that sociocultural psychology could itself be seen as an institution in-the-making.

D Mapping of Cultural Heritage: Special Problems and best Practices in Extreme Case-Studies

Science.gov (United States)

Patias, P.; Kaimaris, D.; Georgiadis, Ch.; Stamnas, A.; Antoniadis, D.; Papadimitrakis, D.

2013-07-01

Photogrammetrey has a long successful history in the area of 3D modelling and documentation of cultural heritage monuments. In some cases an extensive study, preparation and the application of novel solutions is required for the successful documentation and 3D modelling of monuments. In most of the cases the problem that we have to face is difficulties regarding accessing, photographing, and measuring the monument from the optimal distance, in combination with the need for a high spatial resolution mapping. This paper is highlighting the special problems and the novel solutions, performed during mapping of two significant cultural heritage monuments in Greece. The Roussanou monastery (1527-1529 A.C., Meteora, Center Greece) and its underlying rock, had to be photographed and measured from a far distance and measured with various spatial resolutions. In the lakeside Neolithic settlement of Dispilio (6.000 B.C., western Greece) the enclosure which is covered with vegetation above a height of 3 m, had to be measured with high spatial resolution. The combined use of a laser scanner, a digital camera equipped with a telephoto lens and UAV allowed the successful mapping and the production of orthophotomaps in each case.

Implementation of case studies in undergraduate didactic nursing courses: a qualitative study.

Science.gov (United States)

Dutra, Danette K

2013-07-04

The implementation of unfolding scenario-based case studies in the didactic classroom is associated with learner-centered education. The utilization of learner-centered pedagogies, such as case studies, removes the focus from the instructor and instead places it on the student. Learner-centered pedagogies are believed to improve students' levels of cognition. The purpose of this study was to examine how nurse educators are implementing the pedagogies of case studies in their undergraduate didactic courses. The goal was to examine, document, report, and, ultimately, implement the strategies. Purposeful sampling was utilized in this qualitative, multisite-designed study. For each of the four participants, three separate site visits were completed. Observations and post-observational interviews took place at each site visit. Transcribed data from interviews, observations, and course documents were imported into the computer program Nvivo8. Repetitive comparative analysis was utilized to complete the data coding process. The guiding research question of this study sought to investigate the implementation strategies of case studies in didactic nursing courses. The implementation of case studies by the participants reflected two primary patterns: Formal Implementation (FI) and Informal Implementation (II) of case studies. The FI of case studies was further divided into two subcategories: Formal Implementation of case studies used Inside the Classroom setting (FIIC) and Formal Implementation of cases studies used Outside of the Classroom (FIOC). Results of this investigation have led to an increased understanding of implementation strategies of unfolding scenario-based case studies in undergraduate nursing didactic courses. Data collected were rich in the description of specific methodologies for utilization of case studies and may serve as a resource for faculty in development of creative strategies to enhance the didactic classroom experience.

Remote state preparation without oblivious conditions

International Nuclear Information System (INIS)

Hayashi, A.; Hashimoto, T.; Horibe, M.

2003-01-01

In quantum teleportation, neither Alice nor Bob acquires any classical knowledge on teleported states. The teleportation protocol is said to be oblivious to both parties. In remote state preparation (RSP), it is assumed that Alice is given complete classical knowledge on the state that is to be prepared by Bob. Recently, Leung and Shor [e-print quant-ph/0201008] showed that the same amount of classical information as that in teleportation needs to be transmitted in any exact and deterministic RSP protocol that is oblivious to Bob. Assuming that the dimension of subsystems in the prior-entangled state is the same as the dimension of the input space, we study similar RSP protocols, but not necessarily oblivious to Bob. We show that in this case Bob's quantum operation can be safely assumed to be a unitary transformation. We then derive an equation that is a necessary and sufficient condition for such a protocol to exist. By studying this equation, we show that one-qubit RSP requires two classical bits of communication, which is the same amount as in teleportation, even if the protocol is not assumed oblivious to Bob. For higher dimensions, it is still an open question whether the amount of classical communication can be reduced by abandoning oblivious conditions

Differences in taste between three polyethylene glycol preparations: a randomized double-blind study.

Science.gov (United States)

Lam, Tze J; Mulder, Chris Jj; Felt-Bersma, Richelle Jf

2011-01-01

Patients suffering from chronic constipation require long-term, regular therapy with laxatives. Literature regarding patient preference and acceptance in polyethylene glycol preparations is scarce. Therefore, this research aimed to identify preference between the three polyethylene glycol 3350, namely Molaxole(®), Movicol(®), and Laxtra Orange(®). Furthermore, taste is one of the most important factors leading to patients' adherence, particularly when the treatment lasts for a long time. In this randomized, cross-over double-blind study, 100 volunteers were recruited by advertisement. The volunteers were invited to taste the preparations and grade the taste using a five-point hedonic scale (extremely poor taste [1] to extremely good taste [5]). The volunteers were then asked to choose the most palatable preparation. One hundred volunteers with a mean age of 35 years (range 20-61) were randomized (76 females). Molaxole(®), Movicol(®), and Laxtra Orange(®) had a mean hedonic score of 2.76 (SD: 0.82), 2.81 (SD: 0.76) and 3.12 (SD: 0.82) respectively. The hedonic taste score for Laxtra Orange(®) was significantly better than Molaxole(®) (P = 0.001) and Movicol(®) (P = 0.001). No difference was found between Molaxole(®) and Movicol(®) (P = 0.61). Molaxole(®) was the most preferred preparation for 19 volunteers (19%), Movicol(®) for 24 volunteers (25%) and Laxtra Orange(®) for 55 volunteers (56%). Two volunteers had no preference. The order in which volunteers tested the preparations had no influence on the taste results. No significant differences in age or gender were observed. Laxtra Orange(®) was most palatable preparation. This may have implications for adherence in patients with chronic constipation.

Platelet Preparations for Use in Facial Rejuvenation and Wound Healing: A Critical Review of Current Literature.

Science.gov (United States)

Sclafani, Anthony P; Azzi, James

2015-08-01

In facial plastic surgery, the potential for direct delivery of growth factors from platelet preparations has been of particular interest for use in facial rejuvenation, recovery after facial surgery, and wound healing. A literature search was conducted through PubMed for the terms PRP, PRFM, platelet-rich plasma, platelet-rich fibrin matrix, platelet preparations, platelet therapy, growth factors, platelet facial, platelet facial rejuvenation, platelet wound healing, platelet plastic surgery. Articles pertaining to the use of platelet preparations in facial surgery and wound healing in plastic surgery after 2001 were included. Thirteen in vitro studies showed use of platelet-rich plasma (PRP) and platelet-rich fibrin matrix (PRFM) had a significant effect on cellular activity. Twenty-four out of 28 animal studies exhibited favorable results with use of a platelet preparation, including five of six studies that showed enhanced fat graft survival with addition of a platelet preparation. Twenty-three case series and clinical trials were identified, only two of which showed no differences. Twenty-one reported favorable results with use of various platelet preparations. A total of 47 studies used PRP, four studies evaluated Leukocyte-rich PRP, and fourteen studies used PRFM. The vast majority of studies examined show a significant and measurable effect on cellular changes, wound healing, and facial esthetic outcomes with use of platelet preparations, both topical and injectable. One must also consider possible publication bias against null results that may have had an influence on the data that were available for review. However, the preponderance of studies suggests that platelet preparations might represent an as-of-yet untapped adjunct in facial plastic surgery.

Safety of Intravenous Application of Mistletoe (Viscum album L. Preparations in Oncology: An Observational Study

Directory of Open Access Journals (Sweden)

Megan L. Steele

2014-01-01

Full Text Available Background. Traditional mistletoe therapy in cancer patients involves subcutaneous applications of Viscum album L. preparations, with doses slowly increasing based on patient responses. Intravenous infusion of high doses may improve therapeutic outcomes and is becoming more common. Little is known about the safety of this “off-label” application of mistletoe. Methods. An observational study was performed within the Network Oncology. Treatment with intravenous mistletoe applications is described. The frequency of adverse drug reactions (ADRs to intravenous mistletoe applications was calculated and compared to ADR data from a study on subcutaneous applications. Results. Of 475 cancer patients who received intravenous infusions of Helixor, Abnoba viscum, or Iscador mistletoe preparations, 22 patients (4.6% reported 32 ADRs of mild (59.4% or moderate severity (40.6%. No serious ADRs occurred. ADRs were more frequently reported to i.v. mistletoe administered alone (4.3%, versus prior to chemotherapy (1.6%. ADR frequency differed with respect to preparation type, with Iscador preparations showing a higher relative frequency, compared to Abnoba viscum and Helixor. Overall, patients were almost two times less likely to experience an ADR to intravenous compared to subcutaneous application of mistletoe. Conclusion. Intravenous mistletoe therapy was found to be safe and prospective studies for efficacy are recommended.

Preparation of [3beta-3H] labeled bile acids and bile alcohols

International Nuclear Information System (INIS)

Dayal, B.; Baga, E.; Tint, G.S.; Shefer, S.; Salen, G.

1979-01-01

[3beta-3H]-bile acids and bile alcohols may be useful for metabolic studies in man and animals because the 3-position is invulnerable to bacterial attack. A number of tritium labeled bile acids and bile alcohols were prepared by selective oxidation of the hydroxyl group at carbon-3 followed by reduction with NaBT4. In each case, the bile acids and bile alcohols epimeric at carbon-3 were resolved by analytical and preparative thin-layer chromatography and characterized by gas liquid chromatography. The average yield was 60 to 65% and specific activities of the final products were in the range of 7.4 x 10 7 dpm/mg

28-Day oral (gavage) toxicity studies of green tea catechins prepared for beverages in rats.

Science.gov (United States)

Chengelis, Christopher P; Kirkpatrick, Jeannie B; Regan, Karen S; Radovsky, Ann E; Beck, Melissa J; Morita, Osamu; Tamaki, Yasushi; Suzuki, Hiroyuki

2008-03-01

The beneficial health effects associated with drinking green tea are widely considered to be due primarily to tea catechins. Heat treatment of marketed green tea beverages for sterilization causes epimerization and/or polymerization of tea catechins. Safety studies on heat-treated tea catechins are limited. The objective of the present study was to evaluate potential adverse effects, if any, of two standardized green tea catechin (GTC) preparations: one that underwent heat sterilization (GTC-H) and one that was not heat-sterilized (GTC-UH). A decaffeinated preparation of the GTC-H (GTC-HDC) was also evaluated to ascertain if any effects were due to caffeine. The GTC preparations were administered to rats once daily at levels up to 2000 mg/kg/day for 28 days. There were no deaths attributable to the GTC preparations. The clinical condition of the animals, functional observational battery, motor activity, clinical pathology evaluations, organ weights, and gross necropsy findings were unaffected by any of the GTC preparations. GTC-HDC or GTC-UH dosing had no effects on body weights or microscopic findings, whereas lower body weights and food consumption were observed in the 1000 and 2000 mg/kg/day GTC-H group males. The no observed-adverse-effect level (NOAEL) for localized gastric effects for GTC-H was 1000 mg/kg/day. No other target organs were identified. Thus, the NOAEL for systemic toxicity following oral administration was 2000 mg/kg/day for GTC-H, GTC HDC, and GTC-UH under the conditions of this study.

Using Case Studies to Teach About Global Issues, Bali: A Case Study

Science.gov (United States)

Oswald, James M.

1974-01-01

The South Pacific island of Bali is used as a case study of overpopulation and food shortage. A brief description of the resources, the typical lifestyle of the Balinese farmer, and possible teaching techniques are given. (DE)

Preliminary studies with 188Rhenium-tin colloid for radiation synovectomy: preparation, size determination, in vivo distribution, effects and dosimetry studies

International Nuclear Information System (INIS)

Mathe, D.; Balogh, L.; Polyak, A.; Kiraly, R.; Andocs, G.; Janoki, G. A.; Chaudhari, P.R.; Perge, E.; Glavits, R.

2002-01-01

Generator-produced beta-emitting radionuclides such 188R e are gaining in importance for radiosynoviorthesis because of their availability on a regular basis. We prepared a 188 Re-tin colloid in reaction carried out either at 100 o C or at room temperature (RT). The size of the colloid particles was measured with a laser light-scattering method, and their biodistribution, dosimetric aspects and therapeutic effects were studied in an antigen-induced arthritis (AIA) model in rabbits. 188R e-tin colloid solution was injected intraarticularly into the knee joints of rabbits with AIA and imaging studies were performed. Blood samples were collected post injection for estimation of the blood residence time. We also injected 2 intact rabbits in the same manner with 188R e perrhenate solution in order to observe its effects and distribution in the body. All the treated rabbit knees were subjected to histopathology.The colloid particle size distribution was different after preparation at the different reaction temperatures, with a more suitable mean of 4.53 μm in the RT preparation. The dose delivered to the synovial surface was between 3.51 and 4.21 Gy and that to the bone surface was between 0.70 and 0.84 Gy. Histopathologic examination revealed the development of fibrous connective tissue in the AIA knees 4 weeks after treatment, but not in the control group. The 188R e-tin colloid preparation used in study was suitable for radiation synovectomy application. It requires modifications in the preparation protocol so as to increase the labelling efficiency in correlation with an appropriate particle size. (author)

Preparation and study of new rubber to steel adhesive systems

International Nuclear Information System (INIS)

Labaj, I.; Ondrusova, D.; Dubec, A.; Pajtasova, M.; Kohutiar, M.

2017-01-01

The present paper deals with the preparation of new rubber to steel adhesive systems using the steel surface treatment by applying the adhesive coats based on Co (II) and Cu(II) salts. For demonstration of coats chemical composition EDX analysis was used. The topography and microstructure of prepared adhesive coats were investigated using Scanning Electron Microscopy. Finally the efficiency of adhesion between rubber blends and coated metal steel pieces was evaluated according to Test ASTM D429 Rubber to metal adhesion, method A. The adhesive strength resulting values of prepared steel samples with new adhesive coats were compared with samples covered with adhesive systems commonly used in industry. (authors)

Magistral preparation in nuclear medicine departments: Requirements for their realization

International Nuclear Information System (INIS)

Desruet, M.D.; Bolot, C.; Bourrel, F.; Francois-Joubert, A.; Biechlin-Chassel, M.L.; Couret, I.; Pelegrin, M.; Lao, S.; Ouhayon, E.; Sauvan, R.

2010-01-01

Use of radiopharmaceuticals in French nuclear medicine departments depends on marketing authorization and their development may be compromised by a limited return on investment. As an alternative, radiopharmaceuticals may also be prepared in the form of a magistral preparation, like in some European countries. In this case, these preparations are subjected to restrictions and requirements for radio-pharmacies relating to quality assurance, facilities and equipment, quality of starting materials and final radiopharmaceutical products defined in French good preparation practice. Labelled tracers used as magistral preparations have to be prepared under the full responsibility of a radio-pharmacist and used under the responsibility of the prescribing physician. Conditions of sufficient guarantees for the safety of the patient and adherence to pharmaceutical rules must be evaluated individually. However, this form of preparation intends to supply specific medical needs for an individual patient and is not an answer in the framework of development of radiopharmaceuticals. (authors)

Controlled Remote State Preparation via General Pure Three-Qubit State

Directory of Open Access Journals (Sweden)

Yuebo Zha

2015-07-01

Full Text Available The protocols for controlled remote state preparation of a single qubit and a general two-qubit state are presented in this paper. The general pure three-qubit states are chosen as shared quantum channel, which are not Local operations and classical communication (LOCC equivalent to the mostly used GHz state. This is the first time that general pure three-qubit states have been introduced to complete remote state preparation. The probability of successful preparation is presented. Moreover, in some special cases, the successful probability could reach a unit value.

Preparing Scientists to be Community Partners

Science.gov (United States)

Pandya, R. E.

2012-12-01

Many students, especially students from historically under-represented communities, leave science majors or avoid choosing them because scientific careers do not offer enough opportunity to contribute to their communities. Citizen science, or public participation in scientific research, may address these challenges. At its most collaborative, it means inviting communities to partner in every step of the scientific process from defining the research question to applying the results to community priorities. In addition to attracting and retaining students, this level of community engagement will help diversify science, ensure the use and usability of our science, help buttress public support of science, and encourage the application of scientific results to policy. It also offers opportunities to tackle scientific questions that can't be accomplished in other way and it is demonstrably effective at helping people learn scientific concepts and methods. In order to learn how to prepare scientists for this kind of intensive community collaboration, we examined several case studies, including a project on disease and public health in Africa and the professionally evaluated experience of two summer interns in Southern Louisiana. In these and other cases, we learned that scientific expertise in a discipline has to be accompanied by a reservoir of humility and respect for other ways of knowing, the ability to work collaboratively with a broad range of disciplines and people, patience and enough career stability to allow that patience, and a willingness to adapt research to a broader set of scientific and non-scientific priorities. To help students achieve this, we found that direct instruction in participatory methods, mentoring by community members and scientists with participatory experience, in-depth training on scientific ethics and communication, explicit articulation of the goal of working with communities, and ample opportunity for personal reflection were essential

Septic Systems Case Studies

Science.gov (United States)

A collection of septic systems case studies to help community planners, elected officials, health department staff, state officials, and interested citizens explore alternatives for managing their decentralized wastewater treatment systems.

Contextualising case studies in entrepreneurship: A tandem approach to conducting a longitudinal cross-country case study

DEFF Research Database (Denmark)

Chetty, S. K.; Partanen, J.; Rasmussen, Erik Stavnsager

2014-01-01

Using predictive and effectuation logics as a framework, this research note explains how case study research was conducted to demonstrate rigour and relevance. The study involves a longitudinal cross-country case study on small and medium-sized firm growth and networks undertaken by research teams...... in three countries (Finland, Denmark and New Zealand) involving 33 firms. This research note outlines the implications of this research and provides valuable guidance and reflections upon opportunities for future research regarding the conduct of contextual studies in entrepreneurship without compromising...

Standard guide for preparation of metallographic specimens

CERN Document Server

American Society for Testing and Materials. Philadelphia

2011-01-01

1.1 The primary objective of metallographic examinations is to reveal the constituents and structure of metals and their alloys by means of a light optical or scanning electron microscope. In special cases, the objective of the examination may require the development of less detail than in other cases but, under nearly all conditions, the proper selection and preparation of the specimen is of major importance. Because of the diversity in available equipment and the wide variety of problems encountered, the following text presents for the guidance of the metallographer only those practices which experience has shown are generally satisfactory; it cannot and does not describe the variations in technique required to solve individual specimen preparation problems. Note 1—For a more extensive description of various metallographic techniques, refer to Samuels, L. E., Metallographic Polishing by Mechanical Methods, American Society for Metals (ASM) Metals Park, OH, 3rd Ed., 1982; Petzow, G., Metallographic Etchin...

Pulpal responses to cavity preparation in aged rat molars.

Science.gov (United States)

Kawagishi, Eriko; Nakakura-Ohshima, Kuniko; Nomura, Shuichi; Ohshima, Hayato

2006-10-01

The dentin-pulp complex is capable of repair after tooth injuries including dental procedures. However, few data are available concerning aged changes in pulpal reactions to such injuries. The present study aimed to clarify the capability of defense in aged pulp by investigating the responses of odontoblasts and cells positive for class II major histocompatibility complex (MHC) to cavity preparation in aged rat molars (300-360 days) and by comparing the results with those in young adult rats (100 days). In untreated control teeth, immunoreactivity for intense heat-shock protein (HSP)-25 and nestin was found in odontoblasts, whereas class-II-MHC-positive cells were densely distributed in the periphery of the pulp. Cavity preparation caused two types of pulpal reactions based on the different extent of damage in the aged rats. In the case of severe damage, destruction of the odontoblast layer was conspicuous at the affected site. By 12 h after cavity preparation, numerous class-II-MHC-positive cells appeared along the pulp-dentin border but subsequently disappeared together with HSP-25-immunopositive cells, and finally newly differentiated odontoblast-like cells took the place of the degenerated odontoblasts and acquired immunoreactivity for HSP-25 and nestin by postoperative day 3. In the case of mild damage, no remarkable changes occurred in odontoblasts after operation, and some survived through the experimental stages. These findings indicate that aged pulp tissue still possesses a defense capacity, and that a variety of reactions can occur depending on the difference in the status of dentinal tubules and/or odontoblast processes in individuals.

Impregnation of mesoporous silica for catalyst preparation studied with differential scanning calorimetry

NARCIS (Netherlands)

Eggenhuisen, T.M.; van Steenbergen, M.J.; Talsma, H.; de Jongh, P.E.; de Jong, K.P.

2009-01-01

Aqueous impregnation of mesoporous silica as a first step in catalyst preparation was studied to investigate the distribution of the metal-precursor solution over the support. The degree of pore-filling after impregnation was determined using the freezing point depression of confined liquids. A

Preformulation Studies of Bee Venom for the Preparation of Bee Venom-Loaded PLGA Particles.

Science.gov (United States)

Park, Min-Ho; Kim, Ju-Heon; Jeon, Jong-Woon; Park, Jin-Kyu; Lee, Bong-Joo; Suh, Guk-Hyun; Cho, Cheong-Weon

2015-08-18

It is known that allergic people was potentially vulnerable to bee venom (BV), which can induce an anaphylactic shock, eventually leading to death. Up until recently, this kind of allergy was treated only by venom immunotherapy (VIT) and its efficacy has been recognized worldwide. This treatment is practiced by subcutaneous injections that gradually increase the doses of the allergen. This is inconvenient for patients due to frequent injections. Poly (D,L-lactide-co-glycolide) (PLGA) has been broadly studied as a carrier for drug delivery systems (DDS) of proteins and peptides. PLGA particles usually induce a sustained release. In this study, the physicochemical properties of BV were examined prior to the preparation of BV-loaded PLGA nanoparticles NPs). The content of melittin, the main component of BV, was 53.3%. When protected from the light BV was stable at 4 °C in distilled water, during 8 weeks. BV-loaded PLGA particles were prepared using dichloromethane as the most suitable organic solvent and two min of ultrasonic emulsification time. This study has characterized the physicochemical properties of BV for the preparation BV-loaded PLGA NPs in order to design and optimize a suitable sustained release system in the future.

Case Study Research: Foundations and Methodological Orientations

Directory of Open Access Journals (Sweden)

Helena Harrison

2017-01-01

Full Text Available Over the last forty years, case study research has undergone substantial methodological development. This evolution has resulted in a pragmatic, flexible research approach, capable of providing comprehensive in-depth understanding of a diverse range of issues across a number of disciplines. Change and progress have stemmed from parallel influences of historical transformations in approaches to research and individual researcher's preferences, perspectives, and interpretations of this design. Researchers who have contributed to the development of case study research come from diverse disciplines with different philosophical perspectives, resulting in a variety of definitions and approaches. For the researcher new to using case study, such variety can create a confusing platform for its application. In this article, we explore the evolution of case study research, discuss methodological variations, and summarize key elements with the aim of providing guidance on the available options for researchers wanting to use case study in their work. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1701195

Studies of radiolabelled preparations in the rabbit

International Nuclear Information System (INIS)

Wilson, C.G.; Hardy, J.G.

1982-01-01

Rabbits are used to investigate the dose-response relationship of radiopharmaceuticals. The relationship can be divided into three phases:- (i) Pharmaceutical, covering the rate of release of the drug from the preparation. (ii) Pharmacokinetic, comprising processes of absorption, distribution and metabolism. (iii) Pharmacodynamic, interaction of the drug with the receptor site. (U.K.)

Food preparation supplies predict children's family meal and home-prepared dinner consumption in low-income households.

Science.gov (United States)

Appelhans, Bradley M; Waring, Molly E; Schneider, Kristin L; Pagoto, Sherry L

2014-05-01

Frequent family meals and home food preparation are considered important for children's nutritional health and weight maintenance. This cross-sectional study tested whether these parent-driven behaviors are related to the availability of food preparation supplies in low-income urban households. Caregivers of children ages 6-13 provided information on family meal frequency, child consumption of home-prepared dinners, household food insecurity, and attitudes towards cooking. Researchers used a newly developed Food Preparation Checklist (FPC) to assess the availability of 41 food preparation supplies during a physical audit of the home environment. Caregivers and children provided anthropometric measurements and jointly reported on child dietary intake. In ordinal logistic regression models, greater home availability of food preparation supplies was associated with more frequent family meals and child consumption of home-prepared dinners. Associations were independent of household financial strain, food insecurity, caregiver attitudes toward cooking, and sociodemographic characteristics. Fewer food preparation supplies were available in households characterized by greater food insecurity, lower income, and negative caregiver attitudes towards cooking, but did not differ by child or caregiver weight status. As in prior studies, more frequent family meals and consumption of home-prepared dinners were associated with healthier child dietary intake in several areas. We conclude that food preparation supplies are often limited in the most socioeconomically disadvantaged households, and their availability is related to the frequency with which children consume family meals and home-prepared dinners. The potential role of food preparation supplies as contributors to socioeconomic disparities in child nutritional health and obesity deserves further study. Copyright © 2014 Elsevier Ltd. All rights reserved.

Preparation and study of thickness dependent electrical ...

Indian Academy of Sciences (India)

Unknown

there are only a few reports on ZnS by CBD where the main objective is the study of ZnxCd1–xS thin films (Padam et al 1988; Lokhande 1991). Chemical deposition of ZnS thin films has been reported earlier using different zinc ion releasing sources such as zinc sulphate, zinc chloride etc. In the present case, ZnS films ...

Isotactic polypropylene/carbon nanotube composites prepared by latex technology: Electrical conductivity study

NARCIS (Netherlands)

Grossiord, N.; Wouters, M.E.L.; Miltner, H.E.; Lu, K.; Loos, J.; Van Mele, B.; Koning, C.E.

2010-01-01

Several series of nanocomposites were prepared using a latex-based process, the main step of which consisted of mixing an aqueous suspension of exfoliated carbon nanotubes (CNTs) and a polymer latex. In the present work, a systematic study on the electrical properties of fully amorphous (polystyrene

TOGAF 9 foundation study guide preparation for the TOGAF 9 part 1 examination

CERN Document Server

Harrison, Rachel

2013-01-01

This title is a Study Guide for Togaf® 9 Foundation. It gives an overview of every learning objective for the Togaf 9 Foundation Syllabus and in-depth coverage on preparing and taking the Togaf 9 Part 1 Examination. It is specifically designed to help individuals prepare for certification. This Study Guide is excellent material for: * Individuals who require a basic understanding of Togaf 9; * Professionals who are working in roles associated with an architecture project such as those responsible for planning, execution, development, delivery, and operation; * Architects who are looking for a first introduction to Togaf 9; * Architects who want to achieve Level 2 certification in a stepwise manner and have not previously qualified as Togaf 8 Certified. A prior knowledge of enterprise architecture is advantageous but not required.

Preparation of actinide targets by molecular plating for Coulomb excitation studies at ATLAS

International Nuclear Information System (INIS)

Greene, J. P.

1998-01-01

Molecular plating is now routinely used to prepare sources and targets of actinide elements. Although the technique is simple and fairly reproducible, because of the radioactive nature of the target it is very useful to record various parameters in the preparation of such targets. At Argonne, ∼200 microg/cm 2 thick targets of Pu and Cm were required for Coulomb Excitation (COULEX) Studies with the Argonne-Notre Dame BGO gamma ray facility and later with the GAMMASPHERE. These targets were plated on 50 mg/cm 2 Au backing and were covered with 150 microg/cm 2 Au foil. Targets of 239 Pu, 240 Pu, 242 Pu, 244 Pu and 248 Cm were prepared by dissolving the material in isopropyl alcohol and electroplating the actinide ions by applying 600 volts. The amount of these materials on the target was determined by alpha particle counting and gamma ray counting. Details of the molecular plating and counting will be discussed

Enlarging the `knowledge toolbox': helping students prepare for an innovation-driven world

Science.gov (United States)

Nilsen, Elizabeth

2015-03-01

Physics students graduate from their course of studies to enter the ``world of work.'' While for many years that transition meant joining a large corporation for a life-long career, this is no longer the case. Today's graduates will find their career with a series of organizations - often start-ups and small to mid-sized organizations - whose future depends on the ability to rapidly leverage technical knowledge into useful products and services. This session will discuss the value of preparing physics students to be innovators and entrepreneurs, both as a strategy to prepare them for future careers, as well as an opportunity to fully engage students in seeing the relevance of physics to ``real world'' challenges. The session will feature three case studies: 1) embedding core knowledge and skills within a technical content course; 2) building learning experiences around a team-based start-up exploration; 3) engaging an entire department in considering how to comprehensively include innovation & entrepreneurship themes in the curriculum. The session will conclude with information about how faculty members and institutions can access resources for adopting this approach to their course offerings.

Study on preparation and brain distribution of 125I-β-CIT

International Nuclear Information System (INIS)

Liu Xingdang; Lin Xiangtong

2002-01-01

Objective: To develop a relatively simpler and faster method for the routine preparation of 125 I-β-CIT and animal brain distribution of 125 I-β-CIT. Methods: Peracetic acid or Iodogen as an oxidant was used to prepare 125 I-β-CIT and comparison was made between them. The HPLC purification technique was used to identify the labeled tracer. Stability and safety of the radioiodinated β-CIT were also studied. Groups of mice (n=5) were injected i.v. into the tail vein with 125 I-β-CIT . Animals were killed at 5, 15, 30 and 45 minutes, and 1, 2, 4, 6, 8 and 24 hours. Autoradiography was performed on brains of mice at 4 hours after injection. Results: Two kinds of labeling methods using Iodogen or peracetic acid produced 125 I-β-CIT of radiochemical yields 91.10% ± 8.09%, 54.70 ± 9.81% respectively, with high radiochemical purity (RCP) 99.33% ± 0.15%, 18-25 degree C and pH 1 or 2 is the best for Iodogen preparation. The labeled product was stable for at least 23 days when kept in room temperature, and stable for at least 10 weeks when kept in -4 degree C refrigerator. The peak time of uptake of 125 I-β-CIT in striatum was at four hours after injection and the highest value was 22.93% ± 3.11% ID/g. It's highest uptake rate is 20.09 ± 2.11. Conclusions: The Iodogen preparation method is simpler and has a higher labeling yield than peracetic acid labeling method and the labeling yield is higher than which ever reported abroad. The labeled radiopharmaceutical is stable. 125 I-β-CIT showed the highest accumulation in striatum with high densities of dopamine transporters in brain

A Pilot Stability Study of Dehydroepiandrosterone Rapid-dissolving Tablets Prepared by Extemporaneous Compounding.

Science.gov (United States)

Rush, Steven D; Vernak, Charlene; Zhao, Fang

2017-01-01

Dehydroepiandrosterone supplementation is used to treat a variety of conditions. Rapid-dissolving tablets are a relatively novel choice for compounded dehydroepiandrosterone dosage forms. While rapid-dissolving tablets offer ease of administration, there are uncertainties about the physical and chemical stability of the drug and dosage form during preparation and over long-term storage. This study was designed to evaluate the stability of dehydroepiandrosterone rapid-dissolving tablets just after preparation and over six months of storage. The Professional Compounding Centers of America rapid-dissolving tablet mold and base formula were used to prepare 10-mg strength dehydroepiandrosterone rapid-dissolving tablets. The formulation was heated at 100°C to 110°C for 30 minutes, released from the mold, and cooled at room temperature for 30 minutes. The resulting rapid-dissolving tablets were individually packaged in amber blister packs and stored in a stability chamber maintained at 25°C and 60% relative humidity. The stability samples were pulled at pre-determined time points for evaluation, which included visual inspection, tablet weight check, United States Pharmacopeia disintegration test, and stability-indicating high-performance liquid chromatography. The freshly prepared dehydroepiandrosterone rapiddissolving tablets exhibited satisfactory chemical and physical stability. Time 0 samples disintegrated within 40 seconds in water kept at 37°C. The high-performance liquid chromatographic results confirmed that the initial potency was 101.9% of label claim and that there was no chemical degradation from the heating procedure. Over six months of storage, there were no significant changes in visual appearance, physical integrity, or disintegration time for any of the stability samples. The high-performance liquid chromatographic results also indicated that dehydroepiandrosterone rapid-dissolving tablets retained >95% label claim with no detectable degradation

Pt based PEMFC catalysts prepared from colloidal particle suspensions--a toolbox for model studies.

Science.gov (United States)

Speder, Jozsef; Altmann, Lena; Roefzaad, Melanie; Bäumer, Marcus; Kirkensgaard, Jacob J K; Mortensen, Kell; Arenz, Matthias

2013-03-14

A colloidal synthesis approach is presented that allows systematic studies of the properties of supported proton exchange membrane fuel cell (PEMFC) catalysts. The applied synthesis route is based on the preparation of monodisperse nanoparticles in the absence of strong binding organic stabilizing agents. No temperature post-treatment of the catalyst is required rendering the synthesis route ideally suitable for comparative studies. We report work concerning a series of catalysts based on the same colloidal Pt nanoparticle (NP) suspension, but with different high surface area (HSA) carbon supports. It is shown that for the prepared catalysts the carbon support has no catalytic co-function, but carbon pre-treatment leads to enhanced sticking of the Pt NPs on the support. An unwanted side effect, however, is NP agglomeration during synthesis. By contrast, enhanced NP sticking without agglomeration can be accomplished by the addition of an ionomer to the NP suspension. The catalytic activity of the prepared catalysts for the oxygen reduction reaction is comparable to industrial catalysts and no influence of the particle size is found in the range of 2-5 nm.

A FTIR study water in membrane of nitrocellulose prepared by phase inversion

International Nuclear Information System (INIS)

Benosmane, N.; Boutemeur, B.; Hamdi, M.

2004-01-01

Full text.Cellulose derivates were the first biopolymers used to produce synthesis membranes for technical applications, in this study the state of water in asymmetric membrane of nitrocellulose, prepared by the phase inversion process, was investigated using infrared spectroscopy (FTIR), after membrane preparation by the wet inversion process in acetone, the spectre FTIR of wet asymmetric membrane of nitrocellulose after immersion in water (after one week) is compared to the spectre of dried asymmetric membrane of nitrocellulose, the difference in spectre of dried and wet membrane indicate a weakly hydrogen-bonded to the polymer hydroxyl groups between water and hydroxyl groups in surface of membrane, the results demonstrate the amount of water species present in the surface of asymmetric membrane and heterogeneous of surface

Case studies on age-management in organisations: report on organisational case studies

NARCIS (Netherlands)

Punte, E.; Conen, W.S.; Schippers, J.; Henkens, C.J.I.M.

2011-01-01

The acquisition of case studies was thwarted by the economic crisis and the feeling of being ‘over-researched’ by potential organisations. Although organisations in some sectors (e.g. chemical manufacturing) reported the worst part of the economic crisis was behind, many organisations indicated

Case Study: What Makes a Good Case, Revisited: The Survey Monkey Tells All

Science.gov (United States)

Herried, Clyde Freeman; Prud'homme-Genereux, Annie; Schiller, Nancy A.; Herreid, Ky F.; Wright, Carolyn

2016-01-01

This column provides original articles on innovations in case study teaching, assessment of the method, as well as case studies with teaching notes. In this month's issue the authors provide a more definitive answer to the "What Makes a Good Case?" question based on a just-completed Survey Monkey survey given to NCCSTS teachers.