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1

Nursing students respond to a computer assignment.  

UK PubMed Central (United Kingdom)

Computer-generated information is becoming increasingly important in nursing. Nursing schools are faced with the need to ensure that students have basic informatics skills and rudimentary computer literacy. This article describes the introduction of an assignment using electronic communication skills within a teaching-learning course in a baccalaureate program. The assignment was designed to introduce the students to several tasks that would be useful to them in their studies as well as in their care of clients. Students learned to send electronic mail, post to a class list, use search engines, access libraries, and critique web pages. They developed increased confidence and skill, advancing from informed user to proficient user status as identified by Ronald & Skiba. The students' appraisal of the assignment in terms of value to their nursing education and their nursing careers indicated that they recognized the value of these skills for their professional nursing lives. Activities were monitored for content and technical glitches. Lessons learned are highlighted, and "Inbox overload" is identified. The authors found that nursing curricula can be designed to meet the challenge of fostering computer literacy. The assignment could be easily adapted for continuing education or other professional education endeavors.

Stamler LL; Thomas B; McMahon S

1999-01-01

2

Student Perceptions of the Benefits of a Learner-Based Writing Assignment in Organic Chemistry  

Science.gov (United States)

A writing assignment to increase student understanding of and interest in practical applications of organic chemistry is described. Students were required to study a pharmaceutical or other organic compound and perform a qualitative risk assessment on the chemical. Student perceptions of the benefits of the paper were generally positive. (Contains…

Ablin, Lois

2008-01-01

3

Open Ended Laboratory (OEL) Assignment as Tool Imparting Generic Skills for Engineering Students  

Directory of Open Access Journals (Sweden)

Full Text Available Generic skills play a vital role in increasing the employability and marketability of a student. As for the Department of Chemical and Process Engineering, UKM, some of these skills are imparted in the assignment given to students called Open Ended Laboratory (OEL). In this OEL assignment, students are required to propose an experiment title based on the general topic given for that particular semester. The students, working in groups of 3 to 4 students, need to determine the objectives, apparatus and methods as well as execute the experiment. A report including results, discussion, conclusion and references is submitted for evaluation. The final presentation of students’ work is organised in a competition poster presentation format. Skills such as communication (oral and written), organisation, teamwork, innovation and creativity were evaluated for this assignment. We discovered that these skills can be nurtured by looking at the marks given by the judges and peer assessment matrices.

Noorhisham Tan Kofli; Syarifah Najiha Badar; Norliza Abd Rahman; Mohd Shahbudin Mastar; Siti Rozaimah Sheikh Abdullah

2012-01-01

4

Helping students convert assignments into articles: tips for teachers.  

UK PubMed Central (United Kingdom)

The student may spend a lot of time and effort on an assignment or essay, and when the lecturer makes this comment about the finished product, may go ahead and submit it to a journal editor. If the editor returns the work with the comment 'our readers would be most interested in your work but it needs to be presented as a journal article', the student rarely feels able to spare the time or make the effort to rewrite and resubmit, and the work is never published. The article and the assignment could, however, be produced simultaneously, and below are some suggestions as to how this could be achieved.

Sbaih L

1999-04-01

5

Evidence for occupational therapy interventions: a student educational assignment.  

UK PubMed Central (United Kingdom)

As an educational assignment, two classes of graduate students who had recently completed Level II fieldwork listed interventions they had either witnessed or implemented at their sites. Interventions were then randomly assigned to a different group of graduate students in an upper level research class. Searching the literature from the past 10 years, students located the literature providing evidence for the efficacy of these interventions and categorized them according to five hierarchical levels of effectiveness. Results across both classes indicated support at the two highest levels (I and II) for the following interventions: Constraint-Induced Treatment; Hippotherapy; Proprioceptive Neuromuscular Facilitation and Multisensory Handwriting Programs. Students indicated that this educational experience greatly helped to improve their understanding of research and emphasized the importance of researching the literature supporting interventions as they relate to current practice.

Lederer JM

2005-01-01

6

Evidence for occupational therapy interventions: a student educational assignment.  

Science.gov (United States)

As an educational assignment, two classes of graduate students who had recently completed Level II fieldwork listed interventions they had either witnessed or implemented at their sites. Interventions were then randomly assigned to a different group of graduate students in an upper level research class. Searching the literature from the past 10 years, students located the literature providing evidence for the efficacy of these interventions and categorized them according to five hierarchical levels of effectiveness. Results across both classes indicated support at the two highest levels (I and II) for the following interventions: Constraint-Induced Treatment; Hippotherapy; Proprioceptive Neuromuscular Facilitation and Multisensory Handwriting Programs. Students indicated that this educational experience greatly helped to improve their understanding of research and emphasized the importance of researching the literature supporting interventions as they relate to current practice. PMID:23927651

Lederer, Jeffrey M

2005-01-01

7

Feedback and Error Corrections : on Swedish Students' Written English Assignments  

Digital Repository Infrastructure Vision for European Research (DRIVER)

It is important to think about how to correct an essay and what the students should learn from it. My aim in this paper, is to look into what different researchers have said about feedback on written assignments and carry out a study of the kind of feedback that is actually used in secondary school ...

Eriksson, Maria

8

Impact of a health literacy assignment on student pharmacist learning.  

UK PubMed Central (United Kingdom)

BACKGROUND: The average American adult reads at the 8th grade level while most written health information materials, including medication guides, are written at the 12th grade level. To assist students with health literacy-sensitive communication, pharmacy schools should incorporate educational activities addressing health literacy competencies. OBJECTIVES: The objectives of this study were to evaluate the impact of a health literacy assignment on student pharmacists' perceptions of: 1) learning about health literacy; 2) ability to write health literacy level-appropriate patient education material; and 3) the use of these skills in future pharmacy practice. METHODS: Third professional year student pharmacists were asked to rewrite a patient medication information sheet at the 5th grade reading level, altering it from the 12th grade level. Following assignment completion, students responded to a 4-item open-ended questionnaire on what they learned from the activity, what information components were the most difficult to rewrite and reason for the difficulty, key strategies to accomplish the assignment, and their perception of the impact this assignment had on their future practice. Content analysis of the reflections was performed using QSR NVivo to identify themes grounded in the students' responses. RESULTS: Reflections were completed in 2009 (n = 159) and 2010 (n = 144), for a total of 303 completed reflections. Predominant themes included greater understanding about the challenges, importance, and methods of health literacy level-appropriate communication and greater awareness of the role of pharmacists in presenting information clearly to patients. CONCLUSIONS: Students indicated the activity increased their understanding of the complexity of patient information, the educational needs of patients, and the importance of providing information that is understandable. Student pharmacists learned methods of effective communication with patients and should be better prepared to communicate in a health literacy-level appropriate manner.

Chen AM; Noureldin M; Plake KS

2013-09-01

9

Influence of Assigned Reading on Senior Medical Student Clinical Performance  

Directory of Open Access Journals (Sweden)

Full Text Available OBJECTIVE: This Institutional Review Board-approved, prospective, observational study compared the clinical performance of senior medical students in an emergency medicine (EM) clerkship using a clinical behavioral evaluation tool in which one group had mandatory, topic specific readings and the other did not.METHODS: The study took place in an urban, tertiary referral center emergency department treating 43,000 patients annually and supporting medical student clerkships and an EM residency. The grades of two groups of senior medical students participating in an elective EM clerkship were compared. Those students during the 2002-2004 academic years were not assigned mandatory, topic-specific reading for the clerkship, while those during the 2004-2007 academic years were. The groups were compared on baseline demographic information, prior academic performance, and EM clerkship grade distributions using appropriate statistical techniques, including multinomial logistic regression, chi-square tests, and Fisher's Exact tests.RESULTS: The control and experimental groups each had 83 subjects and were similar in baseline characteristics, except for the control group performing better than the experimental group during the basic science training of medical school (years 1-2; p=0.01). The experimental group had statistically significant more members in the EM Interest Group (EMIG; p=0.0001) and more members who went on to match in an EM residency (p=0.0007). The difference in grade distributions between the control group and experimental group was not statistically significant (p=0.40). Of note, those student members of the EMIG (p=0.0005) and those later matching to an emergency medicine residency (p<0.0001) were more likely to earn a grade of "honors" for the clerkship.CONCLUSION: The addition of uniform, topic-specific reading assignments to an EM senior medical student curriculum does not improve the overall clinical performance of those students as measured using a clinical behavioral evaluation tool.

Hoffman, Lance; Bott, Kristine; Puumala, Susan; Shostrom, Valerie

2009-01-01

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The Impact of Anonymous and Assigned Use of Student Response Systems on Student Achievement  

Science.gov (United States)

This study examined the impact of two approaches to use of student response systems (SRSs) on achievement in a study designed to better understand effective use of the devices. One condition was anonymous use of SRSs, in which graduate students selected a random clicker when entering the classroom. The second condition assigned devices to students

Poole, Dawn

2012-01-01

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Comparison of audio vs. written feedback on clinical assignments of nursing students.  

UK PubMed Central (United Kingdom)

AIM: This pilot study explored using audio recordings as method of feedback for weekly clinical assignments of nursing students. BACKGROUND: Feedback that provides students with insight into their performance is an essential component of nursing education. Audio methods have been used to communicate feedback on written assignments in other disciplines, but this method has not been reported in the nursing literature. METHOD: A survey and VARK questionnaire were completed by eight nursing students. Each student had randomly received written and audio feedback during an eight-week period. RESULTS: There were no differences between written and audio methods. Students perceived audio as the most personal, easy to understand, and positive method. Only one student expressed a preference for written feedback.There was no difference in instructor time. CONCLUSION: Audio feedback is an innovative method of feedback for clinical assignments of 'Net Generation' nursing students.

Bourgault AM; Mundy C; Joshua T

2013-01-01

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Who Assigns the Most ICT Activities? Examining the Relationship between Teacher and Student Usage  

Science.gov (United States)

|The expansion of information and communication technology (ICT) infrastructure in schools is expected to promote learning. To what extent teachers are utilizing the new ICT tools to engage students in learning activities remains a question. This study reports what kind of activities teachers are likely to assign students, and what type of…

Hsu, Shihkuan

2011-01-01

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Using the "write" resources: nursing student evaluation of an interdisciplinary collaboration using a professional writing assignment.  

Science.gov (United States)

Nursing students need the necessary resources to successfully complete a professional paper writing assignment. The purpose of this article is to describe resource support and evaluation strategies used in a professional paper writing assignment in a baccalaureate nursing program. The impetus for the study is to address the need for nursing faculty to move students toward writing proficiency while improving their information management skills. Students need resources to successfully complete professional papers due to the need for mining relevant professional sources, assistance with editing, and refinement of paper gained through peer feedback. Methods include evaluation of the interdisciplinary resource collaboration with campus librarians (information literacy), campus writing center tutorial oversight, and peer reviewer support and feedback. Student evaluation of the teaching strategy found the resources helpful for completion of the writing assignment and the collaborative learning with campus colleagues and writing experts beneficial. PMID:21956258

McMillan, Libba Reed; Raines, Kimberly

2011-09-30

14

Peer Assignment Review Process for Collaborative E-learning: Is the Student Learning Process Changing?  

Directory of Open Access Journals (Sweden)

Full Text Available In recent years collaborative e-learning has been emphasized as a learning method that has facilitated knowledge construction and supported student learning. However some universities especially in developing country contexts are struggling to attain minimal educational benefits from its adoption and use. This paper investigates the application of a peer assignment review process for collaborative e-learning to third year undergraduate students. The study was aimed at evaluating the effect of the peer assignment review process on the student learning process. Data was collected using a survey questionnaire and analyzed using SPSS Version 16.0. While the student reported positive impact of the peer assignment review process in terms of facilitating students to put more effort and improve their work; quick feedback on their assignments; effective sharing and development of knowledge and information and the need of computer competence to manipulate the peer assignment review system, analysis of the quantitative data indicated that the process had limited effect on the learning process. This is attributed to lack of review skills, absence of lecturer scaffolding, low ICT literacy levels and change management.

Evelyn Kigozi Kahiigi; Mikko Vesisenaho; F.F Tusubira; Henrik Hansson; Mats Danielson

2013-01-01

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Adaptive System for Assigning Reliable Students’ Letter Grades—A Computer Code  

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Full Text Available The availability of automated evaluation methodologies that may reliably be used for determining students’ scholastic performance through assigning letter grades are of utmost practical importance to educators, students, and do invariably have pivotal values to all stakeholders of the academic process. In particular, educators use letter grades as quantification metrics to monitor students’ intellectual progress within a framework of clearly specified learning objectives of a course. To students grades may be used as predictive measures and motivating drives for success in a study field. However due to numerous objective and subjective variables that may by be accounted for in a methodological process of assigning students’ grades, and since such a process is often tainted with personal philosophy and human psychology factors, it is essential that educators exercise extra care in maximizing positive account of all objective factors and minimizing negative ramifications of subjectively fuzzy factors. To this end, and in an attempt to make assigning students’ grades more reliable for assessing true-level of mastering specified learning outcomes, this paper will: i) provide a literature review on previous works on the most common methods that have traditionally been in use for assigning students’ grades, and a short account of the virtues and/or vices of such methods, and ii) present a user-friendly computer code that may be easily adapted for the purpose of assigning students’ grades. This would relieve educators from the overwhelming concerns associated with mechanistic aspects of determining educational metrics, and it would allow them to have more time and focus to obtain reliable assessments of true-level of students’ mastery of learning outcomes by accounting for all possible evaluation components.

Saeid A. Alghamdi

2010-01-01

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The impact of teacher assigned but not graded compared to teacher assigned and graded chemistry homework on the formative and summative chemistry assessment scores of 11th-grade students with varying chemistry potential  

Science.gov (United States)

The study analyzed 2005 posttest data compared to 2008 posttest data to determine student end of school year academic achievement outcomes across three academic levels (above average, average, and below average chemistry potential) and two teacher homework evaluation methods (assigned but not graded and assigned and graded) on teacher prepared 11th-grade assessments, district prepared 11th-grade assessment, and district graduation requirement physical science strand 11th-grade science Essential Learner Outcome assessment. Overall, results indicated that students with above average (n = 16), average, (n = 17) and below average (n = 14) chemistry potential whom were given teacher assigned and graded chemistry homework compared to students with above average (n = 17), average (n = 15), and below average (n = 19) chemistry potential whom were given teacher assigned but not graded chemistry homework had statistically significantly higher independent t test matter homework scores while atoms, naming, and reactions homework scores were generally in the direction of higher but not significant scores for students given graded homework regardless of their chemistry potential. Furthermore, students of above average and below average chemistry potential who were given assigned and graded chemistry homework performed statistically significantly better on the 11th-grade district prepared chemistry final and the district prepared physical science strand Essential Learner Outcome assessment t test results compared to students with the same chemistry potential given assigned but not graded chemistry homework, suggesting that the graded chemistry condition may have contributed to improved long term learning and retention of chemistry knowledge. Finally, the coefficient of determination (r2 = .95) measure of strength of relationship between not completing, not graded chemistry homework and a corresponding drop in chemistry assessment scores for all students was 95% and the coefficient of determination (r2 = .82) measure of strength of relationship between not completing, graded chemistry homework and a corresponding drop in chemistry assessment scores for all students was 82%. While not implying causality the study findings suggest that students who complete more homework, not graded or graded, have a higher probability of improving their chemistry assessment scores regardless of their chemistry potential.

Wilson, Jennifer L.

17

Using portfolio assignment to support students individually and sustainably -There's always a first time  

Science.gov (United States)

The recent education of engineers, using the example of satellite geodesy at the Geodetic Institute of the University Karlsruhe (GIK, Germany), is still suffering from time pressure as well as from heavy curriculum content loading. Within this education students, where the academic teachers have to fulfill high requests from the new generation of students as well as from industry and from research institutions respectively, advanced satellite geodetic knowledge has to be transferred effectively and sustainably. In order to enable the students to train newest aspects related to satellite geodesy as well as important key competences, e.g. capacity for independent and academic work, reflection and evaluation skills, presentation skills, an innovative teaching concept was developed, tested, and evaluated. This teaching concept makes use of very different teaching techniques like portfolio assignment, project work, input from experts, jig saw, advance and post organizer. This presentation will focus on the portfolio assignment component. This teaching technique was used at the GIK during the last two years for the first time, in order to support students individually. The lessons learnt within this teaching experiment are going to be presented.

Mayer, M.

2009-04-01

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A Simple Assignment that Enhances Students' Ability to Solve Organic Chemistry Synthesis Problems and Understand Mechanisms  

Science.gov (United States)

Organic chemistry students typically struggle with the retrosynthetic approach to solving synthesis problems because most textbooks present the chemistry grouped by "reactions of the functional group". In contrast, the retrosynthetic approach requires the student to envision "reactions that yield the functional group". A second challenge is the…

Teixeira, Jennifer; Holman, R. W.

2008-01-01

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The Impact of a Collaborative Wikipedia Assignment on Teaching, Learning, and Student Perceptions in a Teacher Education Program  

Science.gov (United States)

This study explored students' perceptions and behaviors of public wiki use during a collaborative Wikipedia assignment in a graduate technology and literacy education course. Results confirmed that the majority of students had an overall positive experience posting content on Wikipedia. Students learned how to use Wikipedia through collaborative…

Bravo, Vanessa J.; Young, Michael F.

2011-01-01

20

An Exploratory Study of Teacher-Required Out-of-Class Academic Collaboration among Students at a Polytechnic in Singapore.  

Science.gov (United States)

Investigates out-of-class academic collaboration among students at a polytechnic in Singapore as they worked on collaborative assignments. Data were collected via a questionnaire completed by 232 students, interviews were conducted with 10 lecturers, observations were made of eight student groups as they collaborated on teacher-required work…

Jacobs, George M.; Hussein, Aisha; Ismail, Fazilah Mohamed; Crookall, David

2001-01-01

 
 
 
 
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Laboratory evaluation of dynamic traffic assignment systems: Requirements, framework, and system design  

Energy Technology Data Exchange (ETDEWEB)

The success of Advanced Traveler Information 5ystems (ATIS) and Advanced Traffic Management Systems (ATMS) depends on the availability and dissemination of timely and accurate estimates of current and emerging traffic network conditions. Real-time Dynamic Traffic Assignment (DTA) systems are being developed to provide the required timely information. The DTA systems will provide faithful and coherent real-time, pre-trip, and en-route guidance/information which includes routing, mode, and departure time suggestions for use by travelers, ATIS, and ATMS. To ensure the credibility and deployment potential of such DTA systems, an evaluation system supporting all phases of DTA system development has been designed and presented in this paper. This evaluation system is called the DTA System Laboratory (DSL). A major component of the DSL is a ground- truth simulator, the DTA Evaluation System (DES). The DES is envisioned to be a virtual representation of a transportation system in which ATMS and ATIS technologies are deployed. It simulates the driving and decision-making behavior of travelers in response to ATIS and ATMS guidance, information, and control. This paper presents the major evaluation requirements for a DTA Systems, a modular modeling framework for the DES, and a distributed DES design. The modeling framework for the DES is modular, meets the requirements, can be assembled using both legacy and independently developed modules, and can be implemented as a either a single process or a distributed system. The distributed design is extendible, provides for the optimization of distributed performance, and object-oriented design within each distributed component. A status report on the development of the DES and other research applications is also provided.

Miaou, S.-P.; Pillai, R.S.; Summers, M.S.; Rathi, A.K. [Oak Ridge National Lab., TN (United States); Lieu, H.C. [Federal Highway Administration, McLean, VA (United States). Intelligent Systems Div.

1997-01-01

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Developing and Evaluating Clinical Written Assignment in Clinical Teaching for the Senior B.S. Nursing Students: An action research  

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Full Text Available Introduction: In a four-year undergraduate level , the nursing students have to get prepared in the patients education, designing care plans, applying nursing processes and exercise the clinical decisions, in addition to learning practical skills. Therefore, multiple clinical teaching strategies in nursing must be applied. In this study the sheets for the mentioned fields were designed and used. Methods: In this action research in Tabriz University of Medical Sciences, 64 nursing senior students and related instructors participated. Clinical written assignment included the patient’s health condition sheet, tables showing the used medicines and the precautions, the clinical and paraclinical tests and the results, identifying the patient problems, designing and implementing care plan and writing nursing reports with SOAPIE method. The instructors’ viewpoints were achieved through the group discussions and their notes taken. The perceived competency of the students was obtained through a questionnaire. The qualitative data was analyzed by the content analysis and quantitative using SPSS. Results: Both the students and the instructors agreed with the clinical written assignment. The desired care competency of the students before and after assignment was statistically significant (p<0.05). According to the instructors, intervention was useful for the senior students who have passed the courses needed for completing and using the different parts of these forms. Conclusion: Since a need is always felt in the trends of the nursing clinical teaching, the researchers recommend the clinical written assignment and their application along with other strategies for senior nursing students in clinical teaching.

Leila Valizadeh; Vahid Zamanzadeh; Faza Virani

2012-01-01

23

Grid Computing Portlets Development Assignment  

Science.gov (United States)

Grid Computing Portlets Development Assignment - The purpose of this assignment is to show how to create and test a portlet using the Gridsphere Portal. In the process of doing that, the student will also learn how to install Gridsphere and other required packages.

Ferner, Clayton; Wilkinson, Barry

2011-06-30

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Nursing students gain tools for knowledge utilisation through a work and research integrated learning assignment – a qualitative study  

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Full Text Available Background: By integrating education, research and collaboration with society, in a learning assignment, the level of nursing students learning can be enhanced. Aim: The purpose of this study was to explore nursing students’ experiences of participating in a work and research integrated learning assignment during their clinical practice courses. Methods: At the end of their nursing training, in their sixth semester, five nursing students were recruited to the study and interviewed after which the texts of interviews were analysed using content analysis. The participants had been involved in two studies, one during their second semester, where the risk of falling was assessed, and one during their sixth semester where the risk for under nutrition was assessed. Results: The students experienced that the two assignments enhanced their learning in how to work as a foreman/supervisor, how to inform and engage in dialogue, about using risk assessment, and further, gave them the opportunity to meet the people behind the diagnosis. Through assignments they could also identify the need for knowledge within the study focus, for instance, the risks for falling or the risk of undernourishment. Further, they described how they tried to live up to the ethical standards and that they had learned about using a scientific approach in their work. Conclusion: It is possible to integrate Research, Education and Collaboration in a learning assignment during Nursing education (RECN-assignment) by allowing nursing students to participate in an actual research project during their work integrated learning courses. Such an approach enhances nursing students learning about research and the area being studied in the actual research project.

Albert Westergren; Ellinor Edfors

2013-01-01

25

The Impact of Teacher Assigned but Not Graded Compared to Teacher Assigned and Graded Chemistry Homework on the Formative and Summative Chemistry Assessment Scores of 11th-Grade Students with Varying Chemistry Potential  

Science.gov (United States)

The study analyzed 2005 posttest data compared to 2008 posttest data to determine student end of school year academic achievement outcomes across three academic levels (above average, average, and below average chemistry potential) and two teacher homework evaluation methods (assigned but not graded and assigned and graded) on teacher prepared…

Wilson, Jennifer L.

2010-01-01

26

High school graduation requirements for students with disabilities.  

Science.gov (United States)

Although increasing the high school graduation rate is now a national goal, requirements for graduation are not set at the national level. And, although the goal is said to include students in special education programs, what high school graduation means for these students is not clear. We collected documentation from state departments of education to examine high school graduation requirements for students in general, and for students with disabilities. Forty-four states use Carnegie course unit requirements ranging from 10.35 to 24.00 credits. Seventeen states currently have requirements for either a minimum competency test or an exit exam. Local education agencies in several states have the option of establishing more stringent requirements than called for in state guidelines. Exit documents that are awarded to students with disabilities (e.g., standard diplomas, modified diplomas, certificates of attendance) also vary from state to state, with similar requirements sometimes earning different types of exit documents in different states. These inconsistencies in graduation requirements and their implications for students with learning disabilities are discussed. PMID:9364898

Thurlow, M L; Ysseldyke, J E; Reid, C L

27

High school graduation requirements for students with disabilities.  

UK PubMed Central (United Kingdom)

Although increasing the high school graduation rate is now a national goal, requirements for graduation are not set at the national level. And, although the goal is said to include students in special education programs, what high school graduation means for these students is not clear. We collected documentation from state departments of education to examine high school graduation requirements for students in general, and for students with disabilities. Forty-four states use Carnegie course unit requirements ranging from 10.35 to 24.00 credits. Seventeen states currently have requirements for either a minimum competency test or an exit exam. Local education agencies in several states have the option of establishing more stringent requirements than called for in state guidelines. Exit documents that are awarded to students with disabilities (e.g., standard diplomas, modified diplomas, certificates of attendance) also vary from state to state, with similar requirements sometimes earning different types of exit documents in different states. These inconsistencies in graduation requirements and their implications for students with learning disabilities are discussed.

Thurlow ML; Ysseldyke JE; Reid CL

1997-11-01

28

What does an innovative teaching assignment strategy mean to nursing students?  

Science.gov (United States)

The concept of innovation in nursing education has been addressed in published literature on faculty-defined and faculty-created teaching strategies and instructional methods. In this project, innovation is defined as "using knowledge to create ways and services that are new (or perceived as new) in order to transform systems" (Pardue, Tagliareni, Valiga, Davison-Price, & Orchowsky, 2005). Studies on nursing student perceptions of innovation are limited, and it is unclear how undergraduate and graduate students conceptualize innovative learning experiences. This project explored students' perceptions of their experiences with instructor-defined, innovative teaching/learning strategies in four types of nursing education programs. Issues nurse educators should consider as they apply new techniques to their teaching are discussed. PMID:19606658

Neuman, Lois H; Pardue, Karen T; Grady, Janet L; Gray, Mary Tod; Hobbins, Bonnie; Edelstein, Jan; Herrman, Judith W

29

What does an innovative teaching assignment strategy mean to nursing students?  

UK PubMed Central (United Kingdom)

The concept of innovation in nursing education has been addressed in published literature on faculty-defined and faculty-created teaching strategies and instructional methods. In this project, innovation is defined as "using knowledge to create ways and services that are new (or perceived as new) in order to transform systems" (Pardue, Tagliareni, Valiga, Davison-Price, & Orchowsky, 2005). Studies on nursing student perceptions of innovation are limited, and it is unclear how undergraduate and graduate students conceptualize innovative learning experiences. This project explored students' perceptions of their experiences with instructor-defined, innovative teaching/learning strategies in four types of nursing education programs. Issues nurse educators should consider as they apply new techniques to their teaching are discussed.

Neuman LH; Pardue KT; Grady JL; Gray MT; Hobbins B; Edelstein J; Herrman JW

2009-05-01

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Academic Integrity and Student Plagiarism: Guided Instructional Strategies for Business Communication Assignments  

Science.gov (United States)

Maintaining academic integrity is critical to the sustainability of a civil society and to the democratic process. Educators across the disciplines are growing increasingly disturbed by the level of plagiarism on university campuses. The author contends that developing supportive ways of empowering students to become more independent writers in…

Okoro, Ephraim A.

2011-01-01

31

Information Literacy Skills: Teacher and Student Viewpoints. A review of: Herring, James E. “A Critical Investigation of Students’ and Teachers’ View of the Use of Information Literacy Skills in School Assignments.” School Library Media Research 9 (2006). 14 May 2007 .  

Directory of Open Access Journals (Sweden)

Full Text Available Objective – To examine student and teacher views of information literacy skills in school assignments in order to determine: 1) To what extent did students value the use of a research model booklet (PLUS)? 2) How confident were the students about doing a good assignment and did the PLUS booklet affect their confidence? 3)What benefits and limitations did students identify from individual brainstorming and concept mapping in relation to learning more about their topic and producing a good assignment? 4) To what extent did students see value in doing preliminary reading to revise their initial keywords and concept maps? 5) What reading and note?taking strategies did students adopt when using print and electronic resources? 6) To what extent (and why) did students prefer to use electronic rather than print resources? 7) What are the implications for teachers and school library media specialists (SLMS)?Design – Qualitative, action research; collaborative inquiry.Setting – Ripon Grammar School, Yorkshire, United Kingdom (high school/coeducational).Subjects – Fifty?two students in the second year of high school (year 8) enrolled in a science class studying sound technology; the school library media specialist (SLMS); science teachers.Methods – Students in this study had previously been taught a variety of information skills and had been introduced to a research model called PLUS (Purpose, Location, Use, Self?Evaluation). Students were given a PLUS model booklet, were required to select a topic in the area of sound technology, and were expected to do brainstorming and concept mapping and to produce a 600?word essay. After the assignment was completed, three methods of data collection were employed to determine students’ and teachers’ views: 1) post?assignment questionnaire 2) group interviews with students and teachers 3)semi?structured interview with the school librarian.Main results – Responses indicated that students were “mostly” satisfied with the use of the PLUS model, although there were 18 students who did not respond to questions regarding the use of the booklet. It was also clear from the questionnaire that the majority of the students did not feel confident in their abilities to produce a satisfactory assignment prior to beginning the research; however, 48% of the students indicated that the PLUS booklet made them more confident. A comparable number of students said the booklet had no effect on their confidence and one student said it made them less confident. Students responded very positively about the use of individual brainstorming and concept mapping as a way to organize and focus on their topic. (There was a split between those who felt a written concept map was useful and those who felt a mental concept map was just as helpful.) The majority of students felt that group brainstorming was helpful, while a few indicated the behavior of other students during group brainstorming was a hindrance. Questions about preliminary reading were not open?ended but were multiple choice. There was no response to indicate whether the preliminary reading was helpful or not, but rather how it was helpful. Most students indicated it had helped to identify the right keywords for further research and it helped them in finding the right resources. Students were questioned on the format of their note?taking. Sixty?five per cent preferred to hand write their notes in a notebook; fifteen per cent preferred to take notes electronically in some type of word processing program; twelve per cent preferred to cut and paste into a word processor; and eight per cent preferred “other methods.” Note?taking styles ranged from bulleted lists to spider diagrams, to using headings with categorized notes. When asked to indicate the percentage of information derived from Web sites versus information from books and journals, responses showed that over 65.5 % of the information came from web sites while only 35.5 % came from print material. When asked why, students responded that Websites we

Julie Stephens

2007-01-01

32

"I'm Glad I'm Not Gay!": Heterosexual Students' Emotional Experience in the College Classroom with a "Coming Out" Assignment.  

Science.gov (United States)

Discusses a sex and gender course where heterosexual students were asked to write a 'coming out' letter to a person of their choice. States students analyzed their reaction to the assignment, discussed, and explored prominent issues on the subject of homosexuality. (Author/KDR)

De Welde, Kristine; Hubbard, Eleanor A.

2003-01-01

33

Sequential reading/writing assignment  

Science.gov (United States)

Right now I use four essay assignments in Paleontology. These assignments work to help students meet several goals of the course, including using reading/writing for critical thinking, synthesizing information from different sources, and formulating new research questions. In particular, the last two of the four assignments are designed as part of a multi-step process. Each student is assigned a particular reading for which he or she will be the primary discussant in a class discussion. Two things are required to make this discussion work and to achieve the (hoped for) "aha" moments for the students. Students must take the time to read and understand the paper they've received. It's useful, particularly if students are just starting out reading primary literature, to discuss how to approach reading a journal article. Maybe most important is inculcating the idea that most people don't read straight through a paper, that multiple readings are important, and that it's not like reading a novel it takes time to absorb. On discussion day, have students talk about the papers in chronological sequence. There should be back and forth discussion, of course, but when this process works right, (which is most of the time, in my experience), the stepwise introduction and discussion of the papers allows students to see how the problem was originally framed, how it developed, and how new information changes interpretations (and that there may not be a clear resolution). After the discussion, hand out essay assignments tailored to the skills and knowledge you want them to acquire.

Kendrick, David

34

Required Volunteers: Community Volunteerism among Students in College Classes  

Science.gov (United States)

Volunteering implies free choice, but people in some situations can feel compelled to volunteer. Hypotheses about students' volunteer work focused on self-determination and sufficiency of justification for their behavior. We examined required versus nonrequired volunteerism, internal and external motivation for volunteering, and attitudes of…

Beehr, Terry A.; LeGro, Kimberly; Porter, Kimberly; Bowling, Nathan A.; Swader, William M.

2010-01-01

35

Teacher competences required for developing reflection skills of nursing students.  

UK PubMed Central (United Kingdom)

AIM: This paper is a report of a study in senior secondary vocational education designed to develop a framework for teacher competences to support nursing students in developing their reflection skills. BACKGROUND: For healthcare-related professions such as nursing, there is a growing attention for developing reflection skills. Little is known about teacher competences required to support the development of reflection skills in nursing students. Developing a framework of teacher competences can contribute to filling up this gap. These competences are described in 91 indicators distributed over six task domains. METHODS: A Delphi study was conducted in the first half year of 2008 to get consensus on a framework of teacher competences required for creating the learning environment needed for developing reflection skills in nursing students. Experts judged teacher competences on a seven-point Likert-type scale. FINDINGS: In the first round, mean scores on the teacher competences were already high. Minor revisions were needed. In the second round, mean scores increased, whereas standard deviations decreased in round 2 compared with round 1. These changes were statistically significant. Coaching was seen as most important task domain. CONCLUSION: Consensus has been reached on teacher competences to be used in nursing education to develop students' reflection skills. The framework of competences may be a source for curriculum development concerning reflection skills and for teacher training programmes to coach nursing students' reflections.

Dekker-Groen AM; van der Schaaf MF; Stokking KM

2011-07-01

36

Structural NMR assignment  

International Nuclear Information System (INIS)

Full text: General automated NMR assignment approaches are aimed at full heteronuclear assignment, which is needed for structure determination. Usually, full assignment requires at least as much spectral information as is used for structure generation. For large proteins, obtaining sufficient spectral information may require a number of sample preparations and many spectra, resulting in a significant overhead for the use of NMR in biochemical investigation. For a protein of biochemical interest one may already have an x-ray crystal structure, but spectral assignment is still needed to use NMR as a structural probe for ligand binding studies. In this situation it may be possible to use much less spectral information to make an assignment based purely on the correspondence of structural data to the measurements contained in a few simple spectra. We introduce a framework to accomplish this 'structural assignment', and give some observations on the practical requirements for a structural assignment to succeed

1999-01-01

37

Principals Make Assignments Matter  

Science.gov (United States)

|The inner-city high school in Washington, DC, that Guillaume Gendre joined as an assistant principal had a modest reputation for achievement but was nevertheless challenged to raise expectations for student work. In other schools, Gendre had used assignments--a specific kind of instructional task in which students are charged to think about an…

Dougherty, Eleanor

2013-01-01

38

Assignments as a Pedagogical Tool in Learning to Teach Science: A Case Study  

Science.gov (United States)

|Fostering student teachers' confidence and competence to teach science in early childhood settings is a complex and challenging task for teacher educators situated in university classrooms. The research reported in this paper is based on an analysis of 3rd-year early childhood student teachers' assignments. The assignment required them to…

Garbett, Dawn L.

2007-01-01

39

Applying the ICF to identify requirements for students with Asperger syndrome in higher education.  

UK PubMed Central (United Kingdom)

Abstract Higher education requires more than academic skills and everyday student-life can be stressful. Students with Asperger syndrome (AS) may need support to manage their education due to difficulties in social functioning. Objective: As preparation for the development of a structured tool to guide student and coordinator dialogues at Swedish universities, this study aimed to identify ICF categories that reflect requirements in everyday student-life for students with AS. Methods: Using descriptive qualitative approach, information in documents reflecting the perspectives of university students, international classifications, user/health organisations and education authorities were linked to ICF codes. Results: In total, 114 ICF categories were identified, most of which related to learning, tasks and demands, communication and interactions. Conclusion: Students with AS need varying accommodations to be successful in higher education. In the future, ICF-based code sets, including demands on student roles, can be used as checklists to describe functioning and needs for support.

Adolfsson M; Simmeborn Fleischer A

2013-08-01

40

Task Requirements, Task Representation, and Self-Reported Citation Functions: An Exploratory Study of a Successful L2 Student's Writing  

Science.gov (United States)

|This mixed-method study investigates the citation behaviour of a successful L2 postgraduate management student, Sofie, in two pieces of writing, written in response to two assignment tasks in two management modules. The tasks belonged to the same assignment type, but differed in the level of direction provided: one was a directed task,…

Petric, Bojana; Harwood, Nigel

2013-01-01

 
 
 
 
41

A required rural health module increases students' interest in rural health careers.  

UK PubMed Central (United Kingdom)

INTRODUCTION: The Australian Commonwealth Department of Health and Ageing has funded University Departments of Rural Health (UDRHs) to facilitate student placements with the goal of encouraging students to choose rural health practice. The objective of this article is twofold: first, to report student feedback regarding The University of Melbourne-UDRH required 4 week Rural Health Module based in Shepparton, Victoria, at the School of Rural Health, with placements in communities in rural northeast Victoria; and second, to identify students' attitudes about practising in rural areas at the completion of the course. METHODS: Student evaluations conducted at the completion of the program were analysed utilising both quantitative and qualitative survey questions. RESULTS: Of 393 students who completed the course, 93% participated in the evaluation. Over half (70%) said that the course increased their interest in rural health issues more than 'somewhat', and 47% stated that the course increased their interest in practising rurally more than 'somewhat'. Students valued their community placements highly but wanted greater clinical focus. CONCLUSIONS: A required community-based rural health course positively influences many medical students' reported intention toward rural practice and increases most students interest in rural health. Rural general practice placements are in short supply. This course offers valuable rural experience to students without depending significantly on GPs, but student feedback has increased efforts to make the course more clinically focussed.

Critchley J; DeWitt DE; Khan MA; Liaw S

2007-04-01

42

Impact of required versus optional remake of a preparation on pharmacy students' compounding accuracy.  

UK PubMed Central (United Kingdom)

OBJECTIVE: This retrospective study investigated the impact of a required vs an optional remake requirement on student performance in a compounding laboratory course in which students' compounded preparations were analyzed. METHODS: The analysis data for several preparations made by students over a 3-year period were compared for differences in the analyzed content of the active principal ingredient and the number of students who successfully compounded the preparation on the first attempt. RESULTS: Students' compounding accuracy was significantly better for the ketoprofen (pluronic lecithin organogel [PLO]) emulsion (p= 0.003) and mock co-enzyme Q10 troches (p< 0.001) when remaking an inaccurate preparation was optional rather than required. There were no significant differences in the parameters for the other compounded preparations. CONCLUSION: Student performance did not decrease when students were given the option to remake an inaccurate preparation. Factors such as the difficulty of the preparation, time spent compounding, and impact on the student's final course grade also may have influenced student performance.

Alford EL; Shrewsbury RP

2013-05-01

43

Testing Students with Disabilities: Practical Strategies for Complying with District and State Requirements.  

Science.gov (United States)

This book is intended to facilitate the meaningful inclusion of students with disabilities in district and state assessments as required by the 1997 amendments to the Individuals with Disabilities Education Act. First, an introductory chapter offers reasons for including students with disabilities in district and statewide accountability systems.…

Thurlow, Martha L.; Elliott, Judy L.; Ysseldyke, James E.

44

Testing Students with Disabilities: Practical Strategies for Complying with District and State Requirements. Second Edition.  

Science.gov (United States)

This book is intended to facilitate the meaningful inclusion of students with disabilities in district and state assessments as required by the 1997 amendments to the Individuals with Disabilities Education Act. First, an introductory chapter offers reasons for including students with disabilities in district and statewide accountability systems.…

Thurlow, Martha L.; Elliott, Judy L.; Ysseldyke, James E.

45

The Academic Achievement of Students at Colleges of Higher Education in Relation to Admission Requirements ????? ?? ????? ??? ??????? ?????? ?????? ?? ?????? ??????? ?????? ???????? ??????  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The investigation attempts to define the relationship between college admission requirements and the academic achievement of students. The academic records of 600 students were taken at random from twelve colleges and analyzed statistically. The investigation revealed an almost complete lack of corr...

J. LABANI

46

Support Required for Primary and Secondary Students with Communication Disorders and/or Other Learning Needs  

Science.gov (United States)

Prioritization of school students with additional learning needs is a reality due to a finite resource base. Limited evidence exists regarding teachers' prioritization of primary and secondary school students with additional learning needs. The aim of the present article was to differentiate teachers' perceptions of the level of support required

McLeod, Sharynne; McKinnon, David H.

2010-01-01

47

Fast, Compact Assignment Algorithm.  

Science.gov (United States)

The m x n assignment problem is solved by a modified Hungarian algorithm in which the data matrix is built up column by column. Many of the usual bookkeeping operations are thereby avoided, leading to a compact FORTRAN code that requires only four vectors...

D. P. Laurie

1983-01-01

48

Redesign of a required undergraduate pharmacy management course to improve student engagement and concept retention.  

UK PubMed Central (United Kingdom)

OBJECTIVE: To change the structure of a required pharmacy management course to make it more interactive and engaging for students. DESIGN: The course is a required component of undergraduate curriculum and is completed over 2 semesters during the students' third year. Changes included requiring students to lead classroom discussions and complete a business plan in groups. ASSESSMENT: A questionnaire centering on methods of delivery, course content, and outcomes was distributed in 2 academic years, with 74.7% of students responding. Even though the redesigned course required more time, there was strong support for the course among students because they realized the content contributed to their learning. CONCLUSION: A major course redesign is a big commitment by faculty members, but if done through consultations with former and current students, it can be rewarding for all involved. Students overwhelmingly embraced the changes to the course as they realized the restructuring and the resulting increase in workload were necessary to raise the relevance of the course to their future professional practice.

Perepelkin J

2012-12-01

49

Comparison of energy intake and requirement of young students in Isfahan, Iran.  

UK PubMed Central (United Kingdom)

BACKGROUND: Estimation of energy intakes is required for understanding of growth and disease in young students. This study was conducted to estimate the energy intake of young students and compare with their energy requirements. MATERIALS AND METHODS: In this cross-sectional study, using simple random sampling, 400 students, aged 14-18 years, were selected in 2010. Hariss-Benedict equations were used to estimate the energy requirement of each group. RESULTS: Mean and standard error of energy intake and requirements of males was 2155 ± 30 and 1670 ± 18, respectively, and of females was 2700 ± 21, 2300 ± 4 kcal, respectively. Differences of means, energy intake, and requirement in both sexes were significant (P < 0.001). CONCLUSION: Because of their age (14-18 years), which is called growth age, energy intake was lower than their needs.

Tazhibi M; Bahraini N

2012-07-01

50

Personnel dose assignment practices  

International Nuclear Information System (INIS)

Implementation of DOE N 5480.6 Radiological Control Manual Article 511(3) requirements, to minimize the assignment of personnel dosimeters, should be done only under a broader context ensuring that capabilities are in place to monitor and record personnel exposure both for compliance and for potential litigation. As noted in NCRP Report No. 114, personnel dosimetry programs are conducted to meet four major objectives: radiation safety program control and evaluation; regulatory compliance; epidemiological research; and litigation. A change to Article 511(3) is proposed that would require that minimizing the assignment of personnel dosimeters take place only following full evaluation of overall capabilities (e.g., access control, area dosimetry, etc.) to meet the NCRP objectives

1993-01-01

51

Activity Based Physics Alternative Homework Assignments: Bicycle  

Science.gov (United States)

This web page contains an introductory physics homework assignment relating to the motion of a cyclist riding a 12-speed bicycle, developed as an alternative to traditional textbook homework. Students use observational skills and mathematical modeling, combined with basic physics, to solve problems related to the use of a racing bicycle. The problem integrates concepts of torque, friction, force, and acceleration. This item is part of a larger collection of alternative homework assignments designed for introductory physics students. Each assignment poses a series of questions about a single context. To successfully complete assignments, students must think critically about how the physical situation is represented by mathematics.

Vick, K.; Redish, Edward F.; Cooney, Patrick

2008-11-21

52

Enhancing Self-Directed Learning through a Content Quiz Group Learning Assignment  

Science.gov (United States)

|This article presents the findings of an empirical study that examined the learning value of a novel group assessment activity aimed at promoting first-year students' development of basic self-directed learning skills required for university study. A content quiz group learning assignment was designed to enhance students' capacity to ask…

Warburton, Natalie; Volet, Simone

2013-01-01

53

Student research projects and theses: should they be a requirement for medical school graduation?  

UK PubMed Central (United Kingdom)

From 1981 to 1994, 69 fourth-year students at the Albert Einstein College of Medicine participated in a 6-month medical school research project (MSRP) with the same mentor. Students could choose an original project or library project, and were required to prepare a written report suitable for submission to a peer-reviewed journal. In this article, it is assessed whether a mandatory fourth-year MSRP might substitute for traditional clinical electives. Student reactions to the experience were ascertained by using the responses to an open- and closed-ended questionnaire regarding skills gained by doing MSRPs, the impact on their careers, and their relationship to the mentor. Eighty-nine percent of the students responded that MSRPs increased their ability to formulate a hypothesis, 91% reported that this project increased their ability to conduct a literature search, 95% felt that MSRPs increased their knowledge of research techniques, and 91% reported having improved data collection skills after completing these projects. Students also reported that MSRPs increased their ability to critically evaluate the literature (95%) or to work independently (93%), and 89% responded that the project improved their ability to evaluate their individual strengths and weaknesses. Eighty-nine percent reported that the project increased their ability to write a research paper (34% of projects were original research, 35% were literature reviews, and 30% both original research and literature reviews). Thirty-three percent of respondents reported having some kind of problem completing their projects, and 90% of project reports were accepted for publication in peer-reviewed journals. Ninety-one percent of students responded that they had received appropriate guidance from their mentor, and 73% met with him at least once a week. Seventy-three percent described a relationship with the mentor that went beyond project advising. Eighty-five percent responded that the project impacted their careers in medicine, 97% felt that the research experience was a useful replacement for fourth-year electives, and 91% felt they were as well prepared for residency training as their classmates who had regular fourth-year electives without research. Fifty percent of students indicated that completion of an independent research project should not be required for graduation, whereas 18% responded it should be a requirement and 32% were undecided. Incorporating an MSRP in the fourth year appears to increase research skills and is considered to be a useful replacement for traditional elective rotations. The MSRP impacts favorably on future careers; however, many students do not think it should be a mandatory requirement for graduation from medical school.

Frishman WH

2001-05-01

54

Students' Awareness and Requirements of Mobile Learning Services in the Higher Education Environment  

Directory of Open Access Journals (Sweden)

Full Text Available Problem statement: M-learning is considered as the next generation of e-learning using mobile technologies. Students? awareness of such technology is one of the most focuses for success adoption. This study aims to investigate students? awareness and requirements of mobile learning services among Malaysian students in the higher education environment. Approach: The study found that the higher education environment now has the necessary mobile technology infrastructure to utilize m-learning. Results: Moreover, the results show that students have adequate knowledge and good awareness to use such technology in their education environment. Regarding the university mobile applications that students would like to use individually through mobile technologies, the exam result and course registration were the highest in rank, followed by calendar and schedule services. The highest limitations were the cost of transaction and slow data exchange with networks, followed by concerns over confidentiality of personal information. Conclusion: Future research should be conducted with a big number of respondents to ensure the representative and conclusive finding.

Naji S. Alzaza; Abdul R. Yaakub

2011-01-01

55

'Chasing the numbers': Australian Bachelor of Midwifery students' experiences of achieving midwifery practice requirements for registration.  

UK PubMed Central (United Kingdom)

OBJECTIVE: to explore one aspect of the findings from a qualitative study exploring Australian Bachelor of Midwifery students' experiences of achieving competency for beginning practice. DESIGN: a qualitative study using grounded theory, incorporating situational analysis. Data were collected by interviews, field observation and students' documents. SETTING: one university in Victoria, Australia, which was a member of a consortium of universities that first implemented Bachelor of Midwifery curricula. PARTICIPANTS: 19 women, aged 20-40 years, completing the Bachelor of Midwifery course between the years 2005 and 2008. FINDINGS: data analysis revealed an overarching social process of assimilation, and three related subprocesses namely realisation, adaptation and consolidation. This paper focuses on consolidation in terms of competency achievement in relation to set requirements. KEY CONCLUSIONS: while generally found competent for beginning practice, the Bachelor of Midwifery students in this study felt that their ability to achieve competency according to professional midwifery standards, was constrained by the restricted nature of midwifery practice and medical dominance in the hospitals where they were placed. Furthermore, they found it challenging to achieve the minimum midwifery experience requirements, as well as their own personal learning objectives, within the clinical practicum hours provided in the curriculum. IMPLICATIONS FOR PRACTICE: a review of the clinical hours provided by Bachelor of Midwifery curricula is required, with a view to ensure that clinical hours are consistent with recommended hours suggested by Australian Bachelor of Midwifery course accreditation standards. Universities implementing midwifery curricula in Australia need to be cognisant of the theory-practice gap and therefore the applicability of professional competency standards to the education of midwives. The concerns about the reliability of competency standards need to be addressed. Finally, further research is required to validate the current number of, minimum practice experience required for competency for beginning practice and registration as a midwife in Australia.

Licqurish S; Seibold C

2013-06-01

56

Time Students Spend Reading Threaded Discussions in Online Graduate Courses Requiring Asynchronous Participation  

Directory of Open Access Journals (Sweden)

Full Text Available The authors report the results of a study that provides bases for comparison between the time necessary to participate in courses delivered asynchronously online and courses delivered in a traditional classroom setting. Weekly discussion threads from 21 sections of six courses offered as part of online, degree-granting, accredited, graduate programs were examined. The purpose of this research is to determine whether students are spending more or less time participating in an online course than in a traditional classroom.The discussion size (i.e., the number of words per discussion) was determined using the automatic word count function in MS Word. Once the word counts for each course section were determined, the average words per discussion were calculated. The authors used 180 words per minute to calculate the average reading time, based on the work of Ziefle (1998) and Carver (1985, 1990), in order to determine the average minutes per week a student spent reading the discussions.The study indicates that a typical, graduate-level, online, asynchronous discussion requires about one hour a week of reading time, and the time commitment for participatory activity is similar to that of traditional, face-to-face courses, given that it takes under two hours to compose initial messages and responses to the discussion prompt.Although these findings are informative, further research is recommended in the area of time spent on online course activities in terms of student hours earned to enable a direct focus on various student characteristics, such as English language competency and student level.

Abbie H. Brown

2009-01-01

57

A participation requirement to engage students in a pharmacokinetics course synchronously taught at a local and distant campus.  

UK PubMed Central (United Kingdom)

OBJECTIVE: To design, implement, and evaluate a strategy to actively engage doctor of pharmacy (PharmD) students at local and distant sites in a pharmacokinetics course. DESIGN: A Web-based system was designed that allowed second-year pharmacy students to choose whether to participate in a instructor-led class discussion session by registering prior to or during the first 10 minutes of each class. The instructor then used the program to randomly select students to respond to questions based on the assigned reading. Five percent of the overall course grade was based on class participation. ASSESSMENT: For each class session, an average of 85% of students at both the local and distant campuses registered for participation in class discussion and approximately 5% were called on to respond to questions. Student responses to course survey questions regarding the participation strategy were overwhelmingly positive, with 75%-90% agreeing that the strategy more actively engaged them in classroom activities, resulting in improved learning. Student performance in all assessment categories was almost identical at the local and distant sites. CONCLUSIONS: Implementation of a participation strategy in a large course synchronously taught on 2 campuses is feasible and results in successful engagement of most students at both sites.

Mehvar R

2010-09-01

58

La autonomía en el aprendizaje del inglés y su relación con los trabajos independientes asignados a los estudiantes/ Autonomy in English learning and its relationship with independent works assigned to students  

Scientific Electronic Library Online (English)

Full Text Available Abstract in spanish Objetivo: analizar la incidencia de las prácticas de aprendizaje y de los trabajos independientes en el desarrollo de la autonomía de los estudiantes del ciclo básico de inglés del programa de Licenciatura en Lenguas Modernas de la Universidad de San Buenaventura (seccional Cartagena). Metodología: investigación descriptiva y correlacional que mediante datos interpretados cuantitativa y cualitativamente, relaciona las variables en estudio, para determinar su inciden (more) cia en el desarrollo de la autonomía del estudiante. Resultados: aunque algunos estudiantes (25%) son autónomos, el resto no alcanza esa característica, debido al poco control ejercido sobre sus procesos de aprendizaje y a que los trabajos que se les asignan no contribuyen a desarrollar en ellos la autonomía. Conclusiones: las fortalezas encontradas en relación con la motivación de los estudiantes, su satisfacción por el programa y su interés por las nuevas tecnologías de la información y la comunicación son factores que potencializados contribuirían al desarrollo de la autonomía, trabajo que ya se ha iniciado y se comenta al final de este artículo. Abstract in english Objective: To analyze the influence of learning practices and independent assignments, on the development of the autonomy of the students of the English basic cycle of the Modern Languages program. Methodology: Descriptive and correlational investigation, which by means of quantitative and qualitative interpretation of data relates the variables in the study, to determine its influence on the development of autonomy in students. Results: Though some students (25%) are aut (more) onomous, the rest do not reach this characteristic, due to little control exercised on their learning processes and because the tasks that are assigned to them do not help develop autonomy. Conclusions: The strengths found in relation to the motivation of the students, their satisfaction with the program and their interest in ICT, are factors that if promoted, would contribute to the development of autonomy, work that has already begun and is commented on at the end of this article.

Cabrales Vargas, Myriam; Cáceres Cabrales, Jaime Andrés; Feria Marrugo, Irina

2010-05-01

59

Active Quantum Mechanics: Tutorials and Writing Assignments  

Science.gov (United States)

This web site contains active-learning tutorials and writing assignments for upper-level undergraduate quantum mechanics. The tutorials focus on the mathematical formalism of quantum mechanics. The writing assignments focus on the interpretation of quantum mechanics, and particularly the role of experiments. The topics cover range from introduction to the Schrodinger equation through perturbation theory. In the course using these materials, students work in small groups to complete worksheet-based tutorials during class time, and do fairly typical homework problems and writing assignments, on their own.

Timberlake, Todd

2011-08-01

60

Are New Generations of Female College-Student Populations Meeting Calcium Requirements: Comparison of American and Croatian Female Students  

Directory of Open Access Journals (Sweden)

Full Text Available We compared calcium (Ca) sources and intake, as well as multivitamin/mineral supplement use between female students with nutrition/health background and those from general-student-populations. 314 participants 18–37 y, including 57 African-Americans and 54 Caucasian-Americans recruited from Nutrition and/or other Health Sciences departments (NHS), and 100 African-American and 103 Croatian women representing general-student-population (GSP), completed food frequency questionnaire assessing their usual Ca intake and supplement use. NHS populations met recommendations and consumed significantly more Ca, particularly from dairy sources, and were more likely to take supplements than GSP groups, suggesting that health education may influence Ca intake.

Crystal C. Douglas; Ivana Rumbak; Irena Coli? Bari?; Marinela Kova?ina; Martina Piasek; Jasminka Z. Ilich

2010-01-01

 
 
 
 
61

Do Dutch nutrition and dietetics students meet nutritional requirements during education?  

UK PubMed Central (United Kingdom)

OBJECTIVES: To compare the dietary intakes of Dutch nutrition and dietetics students with the Dutch RDA and the Dutch National Food Consumption Survey (DNFCS), and to assess whether dietary intake changes during education. DESIGN: Cross-sectional and longitudinal research (2004-2010). SETTING: Data collection by 7 d dietary record and questionnaire. SUBJECTS: Dutch nutrition and dietetics students. RESULTS: Three hundred and fifty-two first-year and 216 fourth-year students were included. One hundred and thirty-three students in three cohorts were assessed twice. Of first-year students, >80 % met the RDA for all macronutrients. Of these students only 37 % met the RDA for fibre and in 43 % intake of saturated fat was too high. Fourth-year students more often met the RDA for fruits (55 %) and vegetables (74 %) compared with first-year students (32 % and 40 %, respectively). Intake of fruits and vegetables of both first- and fourth-year students was much higher than that of DNFCS participants (where 2 % and 7 %, respectively, met the corresponding RDA). Only <25 % of fourth-year students met the RDA for Fe, Se and vitamin D. In the cohorts, dietary intake for all macronutrients stabilised from the first to the fourth year (>80 %). Intakes of dietary fibre, Ca, Mg, Se, riboflavin, niacin, fruits, vegetables and fish improved significantly during education. CONCLUSIONS: Dietary intake of nutrition and dietetics students is much better than that of DNFCS participants and improved during education. However, there is still a gap between actual dietary intake and the RDA, especially for Fe, Se and vitamin D.

van der Kruk JJ; Jager-Wittenaar H; Nieweg RM; van der Schans CP

2013-05-01

62

Radio Link Frequency Assignment  

UK PubMed Central (United Kingdom)

The problem of radio frequency assignment is to provide communication channelsfrom limited spectral resources whilst keeping to a minimum the interference suered by thosewhishing to communicate in a given radio communication network. This problem is a combinatorial(NP-hard) optimization problem. In 1993, the CELAR (the French Centre d'Electronique del'Armement") built a suite of simplied versions of Radio Link Frequency Assignment Problems(RLFAP) starting from data on a real network [16]. Initially designed for assessing the performancesof several Constraint Logic Programming languages, these benchmarks have been madeavailable to the public in the framework of the European EUCLID project CALMA (CombinatorialAlgorithms for Military Applications).

B. Cabon; S. De Givry; L. Lobjois Fcabon; Department Of

63

Do Dutch nutrition and dietetics students meet nutritional requirements during education?  

Science.gov (United States)

OBJECTIVES: To compare the dietary intakes of Dutch nutrition and dietetics students with the Dutch RDA and the Dutch National Food Consumption Survey (DNFCS), and to assess whether dietary intake changes during education. DESIGN: Cross-sectional and longitudinal research (2004-2010). SETTING: Data collection by 7 d dietary record and questionnaire. SUBJECTS: Dutch nutrition and dietetics students. RESULTS: Three hundred and fifty-two first-year and 216 fourth-year students were included. One hundred and thirty-three students in three cohorts were assessed twice. Of first-year students, >80 % met the RDA for all macronutrients. Of these students only 37 % met the RDA for fibre and in 43 % intake of saturated fat was too high. Fourth-year students more often met the RDA for fruits (55 %) and vegetables (74 %) compared with first-year students (32 % and 40 %, respectively). Intake of fruits and vegetables of both first- and fourth-year students was much higher than that of DNFCS participants (where 2 % and 7 %, respectively, met the corresponding RDA). Only RDA for Fe, Se and vitamin D. In the cohorts, dietary intake for all macronutrients stabilised from the first to the fourth year (>80 %). Intakes of dietary fibre, Ca, Mg, Se, riboflavin, niacin, fruits, vegetables and fish improved significantly during education. CONCLUSIONS: Dietary intake of nutrition and dietetics students is much better than that of DNFCS participants and improved during education. However, there is still a gap between actual dietary intake and the RDA, especially for Fe, Se and vitamin D. PMID:23659552

van der Kruk, Joke J; Jager-Wittenaar, Harriët; Nieweg, Roos Mb; van der Schans, Cees P

2013-05-10

64

Assignment problems in logistics  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We consider two classical problems from location theory which may serve as theoretical models for several logistic problems where one wants to assign elements of a set A to elements of a set B such that some linear or quadratic function attains its minimum. It turns out that linear objective functio...

Povh, Janez

65

Mars - robust automatic backbone assignment of proteins  

Energy Technology Data Exchange (ETDEWEB)

MARS a program for robust automatic backbone assignment of {sup 13}C/{sup 15}N labeled proteins is presented. MARS does not require tight thresholds for establishing sequential connectivity or detailed adjustment of these thresholds and it can work with a wide variety of NMR experiments. Using only {sup 13}C{sup {alpha}}/{sup 13}C{sup {beta}} connectivity information, MARS allows automatic, error-free assignment of 96% of the 370-residue maltose-binding protein. MARS can successfully be used when data are missing for a substantial portion of residues or for proteins with very high chemical shift degeneracy such as partially or fully unfolded proteins. Other sources of information, such as residue specific information or known assignments from a homologues protein, can be included into the assignment process. MARS exports its result in SPARKY format. This allows visual validation and integration of automated and manual assignment.

Jung, Young-Sang; Zweckstetter, Markus [Max Planck Institute for Biophysical Chemistry (Germany)], E-mail: mzwecks@gwdg.de

2004-09-15

66

Mars - robust automatic backbone assignment of proteins  

International Nuclear Information System (INIS)

[en] MARS a program for robust automatic backbone assignment of 13C/15N labeled proteins is presented. MARS does not require tight thresholds for establishing sequential connectivity or detailed adjustment of these thresholds and it can work with a wide variety of NMR experiments. Using only 13C?/13C? connectivity information, MARS allows automatic, error-free assignment of 96% of the 370-residue maltose-binding protein. MARS can successfully be used when data are missing for a substantial portion of residues or for proteins with very high chemical shift degeneracy such as partially or fully unfolded proteins. Other sources of information, such as residue specific information or known assignments from a homologues protein, can be included into the assignment process. MARS exports its result in SPARKY format. This allows visual validation and integration of automated and manual assignment

2004-01-01

67

Channel Assignment In Cellular  

UK PubMed Central (United Kingdom)

This paper proposes a methodology for the channelassignment problem in the cellular communication industry.The problem considers the assignment of a limited channelbandwidth to satisfy a growing channel demand withoutviolating electromagnetic interference constraints. The initialsolution is generated using random constructive heuristic. Thissolution is then improved using a hyper-heuristic techniquebased on the great deluge algorithm. Our experimental results,on benchmarks data sets, gives promising results.

Graham Kendall; Mazlan Mohamad

68

Calibrated peer review assignments for the earth sciences  

Science.gov (United States)

Calibrated Peer Review ??? (CPR), a web-based instructional tool developed as part of the National Science Foundation reform initiatives in undergraduate science education, allows instructors to incorporate multiple writing assignments in large courses without overwhelming the instructor. This study reports successful implementation of CPR in a large, introductory geology course and student learning of geoscience content. For each CPR assignment in this study, students studied web-based and paper resources, wrote an essay, and reviewed seven essays (three from the instructor, three from peers, and their own) on the topic. Although many students expressed negative attitudes and concerns, particularly about the peer review process of this innovative instructional approach, they also recognized the learning potential of completing CPR assignments. Comparing instruction on earthquakes and plate boundaries using a CPR assignment vs. an instructional video lecture and homework essay with extensive instructor feedback, students mastered more content via CPR instruction.

Rudd, II, J. A.; Wang, V. Z.; Cervato, C.; Ridky, R. W.

2009-01-01

69

Understanding Hiroshima: An Assignment Sequence for Freshman English.  

Science.gov (United States)

Presents an extended sequence of reading and writing assignments using John Hersey's "Hiroshima" to introduce composition students to the nature of interpretation, understanding, and composing. Stresses learning through enactment. (RAE)

Jenseth, Richard

1989-01-01

70

Pathways to Assignment of Payees.  

UK PubMed Central (United Kingdom)

How clients come to be assigned representative payees and/or conservators to manage their funds is not well understood. We compared clients assigned a payee during a clinical trial of a money management-based intervention to those not assigned payees and examined antecedents to payee assignment. One year after randomization, significantly more clients assigned to the advisor teller money manager (ATM) money management intervention were assigned payees than participants in the control condition (10 of 47 vs. 2 of 43; p = .02); those assigned payees had lower baseline GAF scores and participated more in study therapies. Several ATM clients were assigned payees after third parties paid more attention to clients' finances, and others after having negotiated storage of their funds with the ATM money manager during the study. Assignment of payees appears to be influenced by whether third parties critically attend to how clients' manage funds and by clients' receptiveness to having a payee.

Rosen MI; Ablondi K; Black AC; Serowik KL; Rowe M

2013-06-01

71

Truthful Assignment without Money  

CERN Multimedia

We study the design of truthful mechanisms that do not use payments for the generalized assignment problem (GAP) and its variants. An instance of the GAP consists of a bipartite graph with jobs on one side and machines on the other. Machines have capacities and edges have values and sizes; the goal is to construct a welfare maximizing feasible assignment. In our model of private valuations, motivated by impossibility results, the value and sizes on all job-machine pairs are public information; however, whether an edge exists or not in the bipartite graph is a job's private information. We study several variants of the GAP starting with matching. For the unweighted version, we give an optimal strategyproof mechanism; for maximum weight bipartite matching, however, we show give a 2-approximate strategyproof mechanism and show by a matching lowerbound that this is optimal. Next we study knapsack-like problems, which are APX-hard. For these problems, we develop a general LP-based technique that extends the ideas ...

Dughmi, Shaddin

2010-01-01

72

English Proficiency Requirements at BC Post-Secondary Institutions: Challenges Posed for Students. Research Results  

Science.gov (United States)

|This newsletter presents key observations from a review of BC post-secondary institutional websites undertaken to assess any differences in admission requirements for entry into standard First Year English courses and in institutional English admission requirements. Recommendations are made on possible actions that could be taken to clarify…

Cooke, Jim

2011-01-01

73

English Proficiency Requirements at BC Post-Secondary Institutions: Challenges Posed for Students. Research Results  

Science.gov (United States)

This newsletter presents key observations from a review of BC post-secondary institutional websites undertaken to assess any differences in admission requirements for entry into standard First Year English courses and in institutional English admission requirements. Recommendations are made on possible actions that could be taken to clarify…

Cooke, Jim

2011-01-01

74

Experiences from Cross-Institutional Exchanges of Undergraduate Business Student Written Cases  

Science.gov (United States)

This article describes an undergraduate course assignment that required 134 students in 52 student teams from three universities, two in the United States and one in the Czech Republic, to write, exchange, and give constructive feedback on a student-written strategic management or international business case and its accompanying teaching note. The…

Ross, Douglas N.; Zufan, Pavel; Rosenbloom, Al

2008-01-01

75

Pre-Assigned Application number  

Science.gov (United States)

... Pre-Assigned Application number. Requesting a Pre-Assigned Application number: ... Does the NDA or ANDA have a referenced IND application? ... More results from www.fda.gov/drugs/developmentapprovalprocess/formssubmissionrequirements

76

The utility of writing assignments in undergraduate bioscience.  

UK PubMed Central (United Kingdom)

We tested the hypothesis that engagement in a few, brief writing assignments in a nonmajors science course can improve student ability to convey critical thought about science. A sample of three papers written by students (n = 30) was coded for presence and accuracy of elements related to scientific writing. Scores for different aspects of scientific writing were significantly correlated, suggesting that students recognized relationships between components of scientific thought. We found that students' ability to write about science topics and state conclusions based on data improved over the course of three writing assignments, while the abilities to state a hypothesis and draw clear connections between human activities and environmental impacts did not improve. Three writing assignments generated significant change in student ability to write scientifically, although our results suggest that three is an insufficient number to generate complete development of scientific writing skills.

Libarkin J; Ording G

2012-01-01

77

Protein side-chain resonance assignment and NOE assignment using RDC-defined backbones without TOCSY data  

International Nuclear Information System (INIS)

One bottleneck in NMR structure determination lies in the laborious and time-consuming process of side-chain resonance and NOE assignments. Compared to the well-studied backbone resonance assignment problem, automated side-chain resonance and NOE assignments are relatively less explored. Most NOE assignment algorithms require nearly complete side-chain resonance assignments from a series of through-bond experiments such as HCCH-TOCSY or HCCCONH. Unfortunately, these TOCSY experiments perform poorly on large proteins. To overcome this deficiency, we present a novel algorithm, called Nasca (NOE Assignment and Side-Chain Assignment), to automate both side-chain resonance and NOE assignments and to perform high-resolution protein structure determination in the absence of any explicit through-bond experiment to facilitate side-chain resonance assignment, such as HCCH-TOCSY. After casting the assignment problem into a Markov Random Field (MRF), Nasca extends and applies combinatorial protein design algorithms to compute optimal assignments that best interpret the NMR data. The MRF captures the contact map information of the protein derived from NOESY spectra, exploits the backbone structural information determined by RDCs, and considers all possible side-chain rotamers. The complexity of the combinatorial search is reduced by using a dead-end elimination (DEE) algorithm, which prunes side-chain resonance assignments that are provably not part of the optimal solution. Then an A* search algorithm is employed to find a set of optimal side-chain resonance assignments that best fit the NMR data. These side-chain resonance assignments are then used to resolve the NOE assignment ambiguity and compute high-resolution protein structures. Tests on five proteins show that Nasca assigns resonances for more than 90% of side-chain protons, and achieves about 80% correct assignments. The final structures computed using the NOE distance restraints assigned by Nasca have backbone RMSD 0.8–1.5 Å from the reference structures determined by traditional NMR approaches.

2011-01-01

78

Utilitarian resource assignment  

CERN Document Server

This paper studies a resource allocation problem introduced by Koutsoupias and Papadimitriou. The scenario is modelled as a multiple-player game in which each player selects one of a finite number of known resources. The cost to the player is the total weight of all players who choose that resource, multiplied by the ``delay'' of that resource. Recent papers have studied the Nash equilibria and social optima of this game in terms of the $L_\\infty$ cost metric, in which the social cost is taken to be the maximum cost to any player. We study the $L_1$ variant of this game, in which the social cost is taken to be the sum of the costs to the individual players, rather than the maximum of these costs. We give bounds on the size of the coordination ratio, which is the ratio between the social cost incurred by selfish behavior and the optimal social cost; we also study the algorithmic problem of finding optimal (lowest-cost) assignments and Nash Equilibria. Additionally, we obtain bounds on the ratio between alterna...

Berenbrink, P; Goldberg, P; Martin, R; Berenbrink, Petra; Goldberg, Leslie Ann; Goldberg, Paul; Martin, Russell

2004-01-01

79

Investigations on Autark Assignments  

UK PubMed Central (United Kingdom)

The structure of the monoid of autarkies for clause-sets is investigated (autarkies aregeneralizations of satisfying (truth) assignments).The notion of a "plain clause-set" is introduced, where every clause is usable by someresolution refutation, and it is shown that a clause-set is plain iff it has no non-trivialautarky.Every clause-set has a unique decomposition into a plain sub-clause-set and a satisfiablesub-clause-set.As a special case of autarkies we introduce the notion of "linear autarky," definableby a system of linear inequalities over the rational numbers (and thus linear autarkies canbe searched for in polynomial time by means of linear programming).Clause-sets without non-trivial linear autarkies we call " weakly plain," and clause-setssatisfiable by a linear autarky we call "linearly satisfiable." As before, every clause-sethas a unique decomposition into a weakly plain sub-clause-set and a linearly satisfiablesub-clause-set, but this time the decomposition i...

Oliver Kullmann

80

Critical Thinking and Reflection Exercises in a Biochemistry Course to Improve Prospective Health Professions Students' Attitudes Toward Physician-Pharmacist Collaboration  

Science.gov (United States)

Objective. To determine the impact of performing critical-thinking and reflection assignments within interdisciplinary learning teams in a biochemistry course on pharmacy students’ and prospective health professions students’ collaboration scores. Design. Pharmacy students and prospective medical, dental, and other health professions students enrolled in a sequence of 2 required biochemistry courses. They were randomly assigned to interdisciplinary learning teams in which they were required to complete case assignments, thinking and reflection exercises, and a team service-learning project. Assessment. Students were asked to complete the Scale of Attitudes Toward Physician-Pharmacist Collaboration prior to the first course, following the first course, and following the second course. The physician-pharmacist collaboration scores of prospective health professions students increased significantly (p<0.001). Conclusions. Having prospective health professions students work in teams with pharmacy students to think and reflect in and outside the classroom improves their attitudes toward physician-pharmacist collaboration.

Cornell, Susan; Fjortoft, Nancy; Bjork, Bryan C.; Chandar, Nalini; Green, Jacalyn M.; La Salle, Sophie; Viselli, Susan M.; Burdick, Paulette; Lynch, Sean M.

2013-01-01

 
 
 
 
81

Tic Tac Toe - Pick 3 in a Row Atomic Model Assignment  

Science.gov (United States)

This activity is a summary/assessment assignment which allows for differentiation and student choice. Students are assessed in their knowledge of the atomic model and the arrangement of elements on the periodic table.

Larson, Janet

82

Comment on Assignment (Guy)  

UK PubMed Central (United Kingdom)

XiXiXiXiXiXi. . . . . . . . . . . . . . . . . . . . .P P . . . . . . . . . . . . . . . . . . . . .Middle RowLast RowFigure 153: Keep two arrays for each of S and E2812 Goals of HotBotHistoryHotBot originated in the Berkeley NOW project. An application was needed that wouldshow the benefits of clustering. A search engine was decided upon as the killer app. becauseits requirements closely matched what cluster computing could provide.AvailabilityIn order to achieve 24x7 uptime, a mission critical infrastructure is necessary. Fault toleranceand redundancy are cornerstones in achieving this goal. The multiple individual machinesin clusters provide a natural method.ScalabilityAdditionally, a search engine must expand its service as client requests grow. Since growth inthe WEB, however, is occurring at a staggering rate, big, expensive machines, quickly wouldbecome overl

83

Evaluation of mental representation for same and mixed compatibility assignments.  

UK PubMed Central (United Kingdom)

In most studies of stimulus-response (S-R) compatibility, assignments within a set are either compatible or incompatible for all S-R combinations. The present study provided an extension of previous research by examining the situations with same or mixed S-R assignments for pairs of subsets from a four-choice spatial precuing task. Assignments of stimuli to responses for the subsets could be same (both subsets assigned compatibility or both assigned incompatibility) or mixed (one subset assigned compatibility and one subset assigned incompatibility). A precue stimulus provided advanced information about which subset, and thus which assignment, would be required for responding on each trial. Experiment 1 had four visual stimuli assigned to four response locations, whereas Experiment 2 had the four visual stimuli assigned to only two response locations. For both experiments, the analyses revealed similar patterns of reaction times, with reaction times slower in the mixed condition than in the same condition. Moreover, the reaction times for the compatible assignments in the mixed sets were slowed more than the incompatible ones in those sets. The nonprecued subset influenced the S-R translation processes, indicating that the nonprecued subset was part of the mental representation upon which subjects were making decisions.

Dornier LA; Gilmour Reeve T

1996-01-01

84

Nonlinear Assignment Problems in Manufacturing  

UK PubMed Central (United Kingdom)

IntroductionNonlinear Assignment Problems (NAP's) are NP-hard combinatorial optimization problemsthat are natural extensions of the classical Linear Assignment Problem (LAP). NAPs havenumerous applications in different fields, ranging from the assignment of facilities to locationsin location theory, to the tracking of elementary particles in high energy physics. We beginthis section with the most basic of all assignment problems, the linear assignment problem.Consider that we are given n facilities and locations, and a matrix IRnThetan3 C := (c ij ) wherec ij represents the cost of placing facility i to location j. The objective is to find an optimalassignment of facilities to locations such that the total placement cost is minimized. Usingthe decision variables x ij 2 f0; 1

Panos M. Pardalos; Leonidas S. Pitsoulis

85

Beyond LMS: Expanding Course Experience with Content Collaboration and Smart Assignment Feedback  

Directory of Open Access Journals (Sweden)

Full Text Available Tools for content collaboration among students and teachers and automated assignment verification have been introduced to students of a third-year computing course. Collaborative work on lecture slides promotes content openness to students via a new open perspective and improves the quality of lectures among other benefits. Assignment verification helps students resolve most common problems giving immediate feedback on their submissions. WikiPres and ORVViS applications developed to assist in these tasks are introduced and presented.

Ivana Bosni?; Marin Orli?; Mario Žagar

2010-01-01

86

Designing Internet research assignments: building a framework for instructor collaboration  

Directory of Open Access Journals (Sweden)

Full Text Available Internet knowledge is increasing steadily among instructors in the academic world. As courses incorporate more instructional technology, traditional undergraduate research assignments are adapting to reflect the changing world of information and information access. New library assignments reflect this shift as well, with term papers and research projects asking students to use Web sites as an information resource, in addition to the standard literature of periodicals and monographs. But the many pitfalls the library profession has learned in its own metamorphosis during the past decade are often repeated in these newer course assignments. The authors in this paper present a framework for librarians to interact with instructors to incorporate Internet resources into traditional term paper and research assignments. They suggest a framework for creating sample assignments librarians can take to campus instructional units, to show the teaching community at large what the library profession has learned from first-hand experience.

David Ward; Sarah Reisinger

2000-01-01

87

Reflective practice: assessment of assignments in English for Specific Purposes  

Directory of Open Access Journals (Sweden)

Full Text Available The construct alternative assessment has been widely used in higher education. It is often defined as any type of assessment of learners who provide a response to an assignment. The key features of alternative assessment are active participation of learners in self-evaluation of their performance, and the development of reflective thinking through reflective thinking (Schön, 1983). The success of alternative assessment in language teaching is predetermined by student’s performance and demonstrates learner’s language proficiency in contemporary communicative classrooms. This paper aims at researching the influence of students’ evaluations of various assignments for their linguistic development in English for Specific Purposes (ESP). The study uses learners’ assessment of different assignments and learners’ in-course and post-course written reflections on benefits to language mastery. Learners’ assignments included were contributions to portfolios (dossiers), such as essays and summaries, oral presentations, short impromptu talks, creative tasks, tests, and self-assessment notes (reflections) on activities in learning ESP. Findings were obtained for two streams of the project participants. Results showed that self-assessment was beneficial for learners’ linguistic development. The context of learners’ reflections reveals that the attitudes to various assignments are affected by success or failure in students’ performance. Reflective practice might help teachers develop ways of dealing with previously identified difficulties and improve the quality of teaching.

Galina Kavaliauskiené; Ligija Kaminskiené; Lilija Anusiené

2007-01-01

88

Collaborative online writing assignments to foster active learning.  

UK PubMed Central (United Kingdom)

To help students master the content of a neurophysiology course, they were asked to participate in collaborative writing projects. In the first two years, students contributed to a class wiki by summarizing one lecture and editing summaries of several others. In the second two years, students worked in teams of three or four to write a series of illustrated chapters spanning the entire semester. The second assignment kept students more engaged than the wiki project, and although they found it a significant amount of work, they also believed that it helped them learn the subject matter. Working in teams, however, was not always a happy experience.

Olivo RF

2012-01-01

89

Two First-Year Students' Strategies for Writing from Sources: Patchwriting or Plagiarism?  

Science.gov (United States)

In this paper we report a case study of two first-year students at a university in Hong Kong doing the same writing assignment that required the use of sources. We explore the students' understanding of plagiarism, their strategies for composing, the similarity between their texts and source texts, and the lecturer's assessment of their work. The…

Li, Yongyan; Casanave, Christine Pearson

2012-01-01

90

An assigned teaching resident rotation.  

UK PubMed Central (United Kingdom)

OBJECTIVE: The authors' adult psychiatry residency training program identified several educational needs for residents at their institution. Junior residents needed enhanced learning of clinical interviewing skills and learning connected to the inpatient psychiatry ward rotations, and senior residents needed opportunities to prepare for the specialty board exam and to develop teaching skills in preparation for attending positions. Changing the residency program structure and implementing a Teaching Resident rotation addressed these needs simultaneously. METHODS: The authors describe the responsibilities of the teaching resident, the role of the teaching resident in the program, and instruction in educational methods. Residents shared their perceptions of the new teaching resident rotation in an anonymous survey. RESULTS: PGY-1, PGY-2, and the PGY-4 residents found the teaching resident rotation helpful in many areas of their learning. CONCLUSION: Service requirements were not compromised and highly valuable educational objectives were achieved for both the PGY-4 teaching residents and the PGY-1 and PGY-2 residents whom they taught. An intensive teaching rotation for senior residents who teach junior residents and medical students is an effective way to deal with systemic changes in psychiatric education.

Daniels-Brady C; Rieder R

2010-07-01

91

Practical Homework Assignments As Part Of Chemistry Teaching And Learning  

Directory of Open Access Journals (Sweden)

Full Text Available The paper presents two examples of classroom practices when practical research tasks in primary and secondary school are assigned as homework. The task for primary school students was aimed at developing divergent thinking, which is evidenced and illustrated by some examples of students’ solutions. The task for secondary school students illustrates how these students are able to apply their classroom knowledge of acids, bases and indicators on the substances they can find in everyday life. The students performed the following activities: problem analysis, action planning, and equipment selection/assembling, performing the experiment, measuring (mass, volume), data recording, and drawing conclusions. The results of both tasks served as a basis for introducing new contents in the classroom and stimulated active participation of a larger number of students.Keywords:

Dragica Trivic; Mirjana Markovi; Miomir Randjelovi

2010-01-01

92

Consistent assignment of quantum probabilities  

International Nuclear Information System (INIS)

We pose and solve a problem concerning consistent assignment of quantum probabilities to a set of bases associated with maximal projective measurements. We show that our solution is optimal. We also consider some consequences of the main theorem in this paper in conjunction with Gleason’s theorem. Some potential applications to state tomography and probabilistic quantum secret-sharing scheme are discussed. (paper)

2012-02-24

93

Evaluation of Offset Assignment Heuristics  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In digital signal processors (DSPs) variables are accessed using k address registers. The problem of finding a memory layout, for a set of variables, that minimizes the address-computation overhead is known as the General Offset Assignment (GOA) Problem. The most common approach to this problem is t...

Huynh, Johnny; Nelson, Jose; Paul, Berube; TOUATI, Sid-Ahmed-Ali

94

Periodic Table of Students.  

Science.gov (United States)

Presents an exercise in which an eighth-grade science teacher decorated the classroom with a periodic table of students. Student photographs were arranged according to similarities into vertical columns. Students were each assigned an atomic number according to their placement in the table. The table is then used to teach students about…

Johnson, Mike

1998-01-01

95

Academic cheating among nursing students.  

UK PubMed Central (United Kingdom)

BACKGROUND: The purpose of the study was to investigate the magnitude and predictors of academic cheating and to understand relevant perspectives among South Korean nursing students. METHODS: Survey responses of 655 undergraduate nursing students from five institutions were analyzed. Demographics, psychological factors of an individual (perceived seriousness of cheating, ethical attitudes to cheating, neutralization behaviors, knowledge of academic integrity and policy) and contextual factors (perceived prevalence of peers' cheating, atmosphere of academic integrity, atmosphere of whistle-blowing, moral support of families and friends) were measured in relation with 11 exam-cheating and 15 assignment-cheating behaviors. Also reasons for cheating and importance of various interventions to discourage cheating were questioned. RESULTS: 50% and 78% of the students were engaged in, respectively, exam-cheating and assignment cheating behaviors. Perceived seriousness of cheating (OR=0.74, 0.64) and perceived prevalence of peers' cheating (OR=3.02, 6.66) were significant predictors for both exam-cheating and assignment cheating. A higher grade, a lack of time, a better job, and a lack of motivation were reported as a major reason for cheating. Multiple interventions were considered important to discourage cheating from different stakeholders. CONCLUSIONS: An alarming level of a cheating problem was found among South Korean nursing students, requiring immediate attention. As the nursing workforce market is becoming global, the cheating issue in nursing education should be managed under collaborative efforts of nursing faculty members around the globe.

Park EJ; Park S; Jang IS

2013-04-01

96

Mapping Learning Outcomes and Assignment Tasks for SPIDER Activities  

Directory of Open Access Journals (Sweden)

Full Text Available Modern engineering programs have to address rapidly changing technical content and have to enable students to develop transferable skills such as critical evaluation, communication skills and lifelong learning. This paper introduces a combined learning and assessment activity that provides students with opportunities to develop and practice their soft skills, but also extends their theoretical knowledge base. Key tasks included self directed inquiry, oral and written communication as well as peer assessment. To facilitate the SPIDER activities (Select, Prepare and Investigate, Discuss, Evaluate, Reflect), a software tool has been implemented in the learning management system Moodle. Evidence shows increased student engagement and better learning outcomes for both transferable as well as technical skills. The study focuses on generalising the relationship between learning outcomes and assignment tasks as well as activities that drive these tasks. Trail results inform the approach. Staff evaluations and their views of assignments and intended learning outcomes also supported this analysis.

Lyn Brodie

2011-01-01

97

Heuristic for Task-Worker Assignment with Varying Learning Slopes  

Directory of Open Access Journals (Sweden)

Full Text Available Fashion industry has variety products, so the multi-skilled workers are required to improve flexibility in production and assignment. Generally the supervisor will assign task to the workers based on skill and skill levels of worker. Since in fashion industry new product styles are launched more frequently and the order size tends to be smaller, the workers always learn when the raw material and the production process changes. Consequently they require less time to produce the succeeding units of a task based on their learning ability. Since the workers have both experience and inexperience workers, so each worker has different skill level and learning ability. Consequently, the assignment which assumed constant skill level is not proper to use. This paper proposes a task-worker assignment considering worker skill levels and learning abilities. Processing time of each worker changes along production period due to a worker learning ability. We focus on a task-worker assignment in a fashion industry where tasks are ordered in series; the number of tasks is greater than the number of workers. Therefore, workers can perform multiple assignments followed the precedence restriction as an assembly line balancing problem. The problem is formulated in an integer linear programming model with objective to minimize makespan. A heuristic is proposed to determine the lower bound (LB) and the upper bound (UB) of the problem and the best assignment is determined. The performance of the heuristic method is tested by comparing quality of solution and computational time to optimal solutions.

Kanajana Thongsanit; Rein Boondisakulchok; Wipawee Tharmmaphornphilas

2010-01-01

98

Windfarm layout as a senior electrical engineering student design project  

Energy Technology Data Exchange (ETDEWEB)

A proven senior design project is described in this paper. Students select equipment, make economic choices, and write a report for a windfarm electrical distribution system. Using topographical maps of potential sites increases realism, helping to make the design project well liked by students. The author has taught a course on Wind Engineering for the past 16 years to a total of 350 students. The design project in this course is the design of a windfarm in the 10 MW size range on an assigned section of land and to recommend one of two assigned wind turbines for installation. The bulk of the project is actually electrical distribution and engineering economics, in that the students select transformers, circuit breakers, and wire sizes to meet certain goals. The required knowledge of wind turbines is rather low and is easily obtained by students, so the project could be given in a variety of power engineering courses.

Johnson, G.L. (Kansas State Univ., Manhattan, KS (United States). Dept. of Electrical and Computer Engineering)

1993-05-01

99

The Random Quadratic Assignment Problem  

CERN Multimedia

Optimal assignment of classes to classrooms \\cite{dickey}, design of DNA microarrays \\cite{carvalho}, cross species gene analysis \\cite{kolar}, creation of hospital layouts cite{elshafei}, and assignment of components to locations on circuit boards \\cite{steinberg} are a few of the many problems which have been formulated as a quadratic assignment problem (QAP). Originally formulated in 1957, the QAP is one of the most difficult of all combinatorial optimization problems. Here, we use statistical mechanical methods to study the asymptotic behavior of problems in which the entries of at least one of the two matrices that specify the problem are chosen from a random distribution $P$. Surprisingly, this case has not been studied before using statistical methods despite the fact that the QAP was first proposed over 50 years ago \\cite{Koopmans}. We find simple forms for $C_{\\rm min}$ and $C_{\\rm max}$, the costs of the minimal and maximum solutions respectively. Notable features of our results are the symmetry of ...

Paul, Gerald; Stanley, H Eugene

2011-01-01

100

Collaborative learning using nursing student dyads in the clinical setting.  

UK PubMed Central (United Kingdom)

Formal pairing of student nurses to work collaboratively on one patient assignment is a strategy for improving the quality and efficiency of clinical instruction while better utilizing the limited resources at clinical agencies. The aim of this qualitative study was to explore the student nurse and patient experiences of collaborative learning when peer dyads are used in clinical nursing education. Interviews were conducted with 11 students and 9 patients. Students described the process of collaborative learning as information sharing, cross-checking when making clinical decisions, and group processing when assessing the outcomes of nursing interventions. Positive outcomes reported by students and patients included reduced student anxiety, increased confidence and task efficiency. Students' primary concern was reduced opportunity to perform hands-on skills which had to be negotiated within each dyad. Meeting the present and future challenges of educating nurses will require innovative models of clinical instruction such as collaborative learning using student peer dyads.

Austria MJ; Baraki K; Doig AK

2013-01-01

 
 
 
 
101

A Comparative Analysis of Pair-work and Individual Assignments In two ELT Grammar Classes  

Directory of Open Access Journals (Sweden)

Full Text Available Assignments prepared in pair-work have long been evaluated to be more successful whencompared to individually prepared assignments in many respects in foreign language learningcontexts. However, there is not much research conducted to reveal the advantages of pair-work in preparing assignments and the linguistic characteristics of the finished texts. In this paper, depending upon an experimental study with the first year students in Department of EnglishLanguage Teaching at Hacettepe University, quality of pair-work assignments and the factors affecting the preparation process are discussed and compared to individual assignments. Results indicate a variety of advantages of student collaboration in preparing written work since outputsare far more grammatical, include less spelling mistakes, and indicate a higher level ofgrammatical awareness. Additionally, pair-work helps students build positive interpersonalrelationships and create a high level of academic solidarity and confidence.

Olcay Sert

2005-01-01

102

Requirements for the Success of the Integration Program of Disabled Students in the Regular Schools from the Perspective of the Teachers of the Learning Resources Rooms  

Directory of Open Access Journals (Sweden)

Full Text Available The purpose of this study is to identify the requirements for the success of the integration program and to find out the causes of success and to provide optimal services for the students with disabilities in regular schools. The study attempts to answer the following questions: 1. What are the most important requirements of the success of the integration of disabled persons in regular schools from the viewpoint of the teachers of the learning resources rooms2. Are there any statistically significant differences to the level of (? (0.05 ? in the requirements of disabilities program success of integration in regular schools from the teachers of learning resources rooms- perspectives attributed to the variable of gender? 3. Are there any statistically significant differences to the level of (? (0.05 ? in the requirements of disabilities program success of integration in regular schools from the teachers of learning resources rooms- perspectives attributed to the variable the years of experience? 4. What is the most appropriate educational option for students with disabilities (The academic integration, social integration, classes attached to the regular school, general education class with their peers, the integration program of the full-day, partial day program integration, from the viewpoint of the teachers of the learning resources rooms)? The study sample consisted of (140) male and female teachers in the learning resources rooms in public and private schools in the Directorate of Amman. These were selected in a simple random manner. And a list of assessment was used to collect information consisting of 70 items, distributed on seven axes (teachers and administration, school environment, supporting services, awareness, students with disabilities, the type of the program which is the most important from the viewpoint of the teachers of the learning resources rooms). The stability and reliability of the instrument were verified using the test and re-test method. The results indicate that the requirements of the success of the integration program, appeared in descending order, were as follows: awareness, support services, integration programs, the domain of the school environment, teachers, students with disabilities, The results also indicate that the program that is the most important and appropriate for students were arranged as follows: the program of social integration, the academic integration program, the program of the integrated public class, program of partial integration, program of private class attached to the regular school, the long- term integration program (Full-day).

Jihad At-Turki; Hisham Ali ALdmour; Khalil A.R Al Maitah; Mohammad Nayef ALsarayreh

2012-01-01

103

Effects of choice on intervention outcomes for college students sanctioned for campus alcohol policy violations.  

UK PubMed Central (United Kingdom)

This study tested the hypothesis that client choice influences intervention outcomes. We recruited 288 student drinkers (60% men, 67% freshmen) required to participate in an intervention due to a violation of campus alcohol policy. Participants were randomized either to self-chosen or researcher-assigned interventions. In the choice condition they selected either a brief motivational intervention (BMI) or a computer-delivered educational program. In the assigned condition they received 1 of the 2 interventions, assigned randomly. Follow-up assessments at 1 and 2 months revealed that choice was associated with higher intervention satisfaction. However, the assigned and choice conditions did not differentially change on consumption or consequences across intervention type. Overall, change scores favored the BMI over the computer-delivered intervention on consumption and consequences. Exploratory analyses revealed that given the choice of intervention, heavier-drinking students self-selected into the face-to-face BMI. Furthermore, among the students who received a BMI, the students who chose it (despite their heavier drinking) reduced drinks per drinking day more than did the assigned students. In summary, offering a choice of intervention to students mandated for campus alcohol violations increased the chance that at-risk students will select a more intensive and effective intervention. (PsycINFO Database Record (c) 2013 APA, all rights reserved).

Carey KB; Demartini KS; Prince MA; Luteran C; Carey MP

2013-09-01

104

ZAP: a distributed channel assignment algorithm for cognitive radio networks  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract We propose ZAP, an algorithm for the distributed channel assignment in cognitive radio (CR) networks. CRs are capable of identifying underutilized licensed bands of the spectrum, allowing their reuse by secondary users without interfering with primary users. In this context, efficient channel assignment is challenging as ideally it must be simple, incur acceptable communication overhead, provide timely response, and be adaptive to accommodate frequent changes in the network. Another challenge is the optimization of network capacity through interference minimization. In contrast to related work, ZAP addresses these challenges with a fully distributed approach based only on local (neighborhood) knowledge, while significantly reducing computational costs and the number of messages required for channel assignment. Simulations confirm the efficiency of ZAP in terms of (i) the performance tradeoff between different metrics and (ii) the fast achievement of a suitable assignment solution regardless of network size and density.

Junior Paulo Roberto; Fonseca Mauro; Munaretto Anelise; Viana Aline; Ziviani Artur

2011-01-01

105

Assigning functional meaning to digital circuits  

Energy Technology Data Exchange (ETDEWEB)

During computer-aided design, the problem of how to determine the logical function of a digital circuit arises in many contexts. For example, assigning functional meaning to a circuit is a fundamental operation in both reverse engineering and implementation validation. This report describes such a determination by discussing how a higher-level functional representation is constructed from a detailed circuit description (i.e., a gate-level netlist, which is a list of logic gates and their interconnections). The approach used involves transforming parts of the netlist into a functional representation and then manipulating this representation. Two types of functional representations are described: (1) a mathematical representation based on the logical operators ``exor`` and ``and`` and (2) a directed acyclic graph representation based on binary decision trees. Each representation provides a canonical form of the logical function being implemented (i.e., a form that is independent of implementation details). Such forms, however, have a well-known problem associated with the ordering of inputs: for each order, a unique form exists. A solution to this problem is given for both representations. Experimental results that demonstrate the use of these representations in the process of assigning functional meaning to a circuit are provided. The report also identifies and discusses issues critical to the performance required of this fundamental operation.

Eckmann, S.T.; Chisholm, G.H. [Argonne National Lab., IL (United States). Decision and Information Sciences Div.

1997-07-01

106

Assigned value improves memory of proper names.  

UK PubMed Central (United Kingdom)

Names are more difficult to remember than other personal information such as occupations. The current research examined the influence of assigned point value on memory and metamemory judgements for names and occupations to determine whether incentive can improve recall of proper names. In Experiment 1 participants studied face-name and face-occupation pairs assigned 1 or 10 points, made judgements of learning, and were given a cued recall test. High-value names were recalled more often than low-value names. However, recall of occupations was not influenced by value. In Experiment 2 meaningless nonwords were used for both names and occupations. The name difficulty disappeared, and value influenced recall of both names and occupations. Thus value similarly influenced names and occupations when meaningfulness was held constant. In Experiment 3 participants were required to use overt rote rehearsal for all items. Value did not boost recall of high-value names, suggesting that differential processing could not be implemented to improve memory. Thus incentives may improve memory for proper names by motivating people to engage in selective rehearsal and effortful elaborative processing.

Festini SB; Hartley AA; Tauber SK; Rhodes MG

2013-08-01

107

Selection of a time slot assignment scheme for a fully variable demand assignment SS/TDMA satellite system  

Science.gov (United States)

Fully variable demand assignment in a SS/TDMA satellite system requires dynamic reconfiguration of the onboard switch state sequence. Some advantages can be expected from burst time plan changes where existing bursts on the frame are not splitted but merely shifted in time. The switching mode allocation associated to a specific traffic requirement is obtained from a time slot assignment algorithm, several of which are presently available. This paper reports the compared performances of a SS/TDMA system, in terms of throughput gains and required signalling capacity as obtained from simulation, considering several time slot assignment algorithms. The results show the importance of carefully selecting an appropriate algorithm when the burst management assumes no burst splitting.

Maral, G.; Bousquet, M.; Wattier, P.

108

On pole structure assignment in linear systems.  

Czech Academy of Sciences Publication Activity Database

pole structure assignmentKód oboru RIV: BC - Teorie a systémy ?ízeníImpakt faktor: 1.124, rok: 2009 http://library.utia.cas.cz/separaty/2009/AS/zagalak-on pole structure assignment in linear systems.pdf

Loiseau, J.-J.; Zagalak, PetrG

109

A Fast Heuristic Algorithm for the Train Unit Assignment Problem  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In this paper we study a railway optimization problem known as the Train Unit Assignment Problem. A train unit consists of a self-contained train with an engine and a set of wagons with passenger seats. Given a set of timetabled train trips, each with a required number of passenger seats, and a set ...

Cacchiani, Valentina; Caprara, Alberto; Toth, Paolo

110

From Letter Writing to Report Writing: Bridging the Gap (My Favorite Assignment).  

Science.gov (United States)

Describes a report-writing assignment that uses business letters to bridge the gap between letters and reports. Notes that in the letter writing unit, students learn to apply the principles of good business writing to various types of letters; and in the report-writing unit, students learn the reporting process (planning, data gathering, analysis,…

Krajewski, Lorraine; Smith, Gwendolyn

1997-01-01

111

Reeling in the Big Fish: Changing Pedagogy to Encourage the Completion of Reading Assignments  

Science.gov (United States)

The authors examined how the regular use of Monte Carlo Quizzes, learning logs, or non-random quizzes impacted student completion of assigned reading and preparedness for class. A questionnaire was used to gather data on student perceptions and self-reported reading behavior in response to each of the methods over the course of a semester. Results…

Carney, Amy G.; Fry, Sara Winstead; Gabriele, Rosaria V.; Ballard, Michelle

2008-01-01

112

Student-Centered Notebooks  

Science.gov (United States)

To recognize the benefit of science notebooks, they should be viewed as useful, personalized tools rather than an assignment. This article examines how the teacher can offer support while still ensuring that the notebook is personal to each student.

Campbell, Brian; Fulton, Lori

2004-11-01

113

ncIDP-assign : a SPARKY extension for the effective NMR assignment of intrinsically disordered proteins  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We describe here the ncIDP-assign extension for the popular NMR assignment program SPARKY, which aids in the sequence-specific resonance assignment of intrinsically disordered proteins (IDPs). The assignment plugin greatly facilitates the effective matching of a set of connected resonances to the co...

Tamiola, Kamil; Mulder, Frans A.A.

114

ncIDP-assign: a SPARKY extension for the effective NMR assignment of intrinsically disordered proteins  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Summary: We describe here the ncIDP-assign extension for the popular NMR assignment program SPARKY, which aids in the sequence-specific resonance assignment of intrinsically disordered proteins (IDPs). The assignment plugin greatly facilitates the effective matching of a set of connected resonances ...

Tamiola, Kamil; Mulder, Frans A. A.

115

Solving multiconstraint assignment problems using learning automata.  

UK PubMed Central (United Kingdom)

This paper considers the NP-hard problem of object assignment with respect to multiple constraints: assigning a set of elements (or objects) into mutually exclusive classes (or groups), where the elements which are "similar" to each other are hopefully located in the same class. The literature reports solutions in which the similarity constraint consists of a single index that is inappropriate for the type of multiconstraint problems considered here and where the constraints could simultaneously be contradictory. This feature, where we permit possibly contradictory constraints, distinguishes this paper from the state of the art. Indeed, we are aware of no learning automata (or other heuristic) solutions which solve this problem in its most general setting. Such a scenario is illustrated with the static mapping problem, which consists of distributing the processes of a parallel application onto a set of computing nodes. This is a classical and yet very important problem within the areas of parallel computing, grid computing, and cloud computing. We have developed four learning-automata (LA)-based algorithms to solve this problem: First, a fixed-structure stochastic automata algorithm is presented, where the processes try to form pairs to go onto the same node. This algorithm solves the problem, although it requires some centralized coordination. As it is desirable to avoid centralized control, we subsequently present three different variable-structure stochastic automata (VSSA) algorithms, which have superior partitioning properties in certain settings, although they forfeit some of the scalability features of the fixed-structure algorithm. All three VSSA algorithms model the processes as automata having first the hosting nodes as possible actions; second, the processes as possible actions; and, third, attempting to estimate the process communication digraph prior to probabilistically mapping the processes. This paper, which, we believe, comprehensively reports the pioneering LA solutions to this problem, unequivocally demonstrates that LA can play an important role in solving complex combinatorial and integer optimization problems.

Horn G; Oommen BJ

2010-02-01

116

Requirements Engineering  

CERN Document Server

Written for those who want to develop their knowledge of requirements engineering process, whether practitioners or students.Using the latest research and driven by practical experience from industry, Requirements Engineering gives useful hints to practitioners on how to write and structure requirements. It explains the importance of Systems Engineering and the creation of effective solutions to problems. It describes the underlying representations used in system modeling and introduces the UML2, and considers the relationship between requirements and modeling. Covering a generic multi-layer r

Hull, Elizabeth; Dick, Jeremy

2011-01-01

117

ncIDP-assign : a SPARKY extension for the effective NMR assignment of intrinsically disordered proteins  

DEFF Research Database (Denmark)

We describe here the ncIDP-assign extension for the popular NMR assignment program SPARKY, which aids in the sequence-specific resonance assignment of intrinsically disordered proteins (IDPs). The assignment plugin greatly facilitates the effective matching of a set of connected resonances to the correct position in the sequence by making use of IDP random coil chemical shifts. AVAILABILITY: The ncIDP-assign extension is available at http://www.protein-nmr.org/.

Tamiola, Kamil; Mulder, Frans A.A.

2011-01-01

118

Assigning Students to Edit Wikipedia: Four Case Studies  

Science.gov (United States)

During the 2010-11 academic year, the Wikimedia Foundation, the nonprofit organization that supports Wikipedia, worked with professors at universities across the United States who were interested in using Wikipedia as a teaching tool in their classrooms through a pilot version of the Wikipedia Education Program. This article presents a case study…

Carver, Brian W.; Davis, Rochelle; Kelley, Robin T.; Obar, Jonathan A.; Davis, Lianna L.

2012-01-01

119

Using Content Reading Assignments in a Psychology Course to Teach Critical Reading Skills  

Directory of Open Access Journals (Sweden)

Full Text Available Liberal arts students are expected to graduate college with fully developed critical reading and writing skills. However, for a variety of reasons these skills are not always as well developed as they might be - both during and upon completion of college. This paper describes a reading assignment that was designed to increase students’ discipline-specific critical reading and writing skills. The assignment was piloted in a mid-level social psychology class. Pre-test/post-test comparisons indicate substantial improvement in students’ ability to identify thesis statements, recognize and interpret evidence, and other critical reading skills. Furthermore, students themselves rate the assignment as efficacious in helping them with both their reading and writing skills.

Debbie Van Camp; Wesley Van Camp

2013-01-01

120

A New Polling-Based Dynamic Slot Assignment Scheme . . .  

UK PubMed Central (United Kingdom)

This paper proposes a new polling-based dynamicslot assignment (DSA) scheme. With the rapid progress of wirelessaccess systems, wireless data communication will become more andmore attractive. In wireless data communication, an efficient DSAscheme is required to enhance system throughput, since the capacity ofradio links is often smaller than that of wired links. A polling-basedDSA scheme is typically used in centralized slot assignment controlsystems. It, however, is difficult to assign the slots to the targetedmobile terminals in a fair-share manner if only a polling-based schemeis used, especially in unbalanced-traffic circumstances, as revealedlater. To solve this problem, we propose the exponential decreasingand proportional increasing rate control as is employed in available bitrate (ABR) service in ATM so that fair slot assignment is achievedeven in heavily-unbalanced-traffic circumstances. Moreover, so thatan AP operating with a large number of MTs can avoid longtransmission delays, a polling-based resource request scheme withrandom access is featured in a new algorithm. Simulations verify thatthe proposed scheme offers fair slot assignment for each user whilemaintaining high throughput and short delay performance.

 
 
 
 
121

GPON system with user controlled port-ID assignment method  

Science.gov (United States)

Passive Optical Network (PON) system with characters of low-cost and high-efficiency has become a promising solution for access network in relieving the bandwidth bottleneck problem. PON system can provide high-speed optical subscriber networks with broad bandwidth and long distance transmission. In current telecommunication carriers' PON system, different service has its given priority which is configured by carriers based on common requirements. However, different users have their own requirement and inflexibility of the given default service priority causes users' inconvenience and frustration. In this paper, we propose a novel method of user controlled Port-IDentifier (Port-ID) assignment in a Gigabit-capable PON (GPON) system. This method provides users a more individualized priority determination mechanism for end users through assigning a multi-level Port-ID to different service. Then users can manage their own bandwidth based on their requirements for different service and carriers can provide a flexible service management mechanism.

Zhang, Na; Yoshiuchi, Hideya

2008-11-01

122

Medical students' experiences with medical errors: an analysis of medical student essays.  

UK PubMed Central (United Kingdom)

OBJECTIVE: This study aimed to examine medical students' experiences with medical errors. METHODS: In 2001 and 2002, 172 fourth-year medical students wrote an anonymous description of a significant medical error they had witnessed or committed during their clinical clerkships. The assignment represented part of a required medical ethics course. We analysed 147 of these essays using thematic content analysis. RESULTS: Many medical students made or observed significant errors. In either situation, some students experienced distress that seemingly went unaddressed. Furthermore, this distress was sometimes severe and persisted after the initial event. Some students also experienced considerable uncertainty as to whether an error had occurred and how to prevent future errors. Many errors may not have been disclosed to patients, and some students who desired to discuss or disclose errors were apparently discouraged from doing so by senior doctors. Some students criticised senior doctors who attempted to hide errors or avoid responsibility. By contrast, students who witnessed senior doctors take responsibility for errors and candidly disclose errors to patients appeared to recognise the importance of honesty and integrity and said they aspired to these standards. CONCLUSIONS: There are many missed opportunities to teach students how to respond to and learn from errors. Some faculty members and housestaff may at times respond to errors in ways that appear to contradict professional standards. Medical educators should increase exposure to exemplary responses to errors and help students to learn from and cope with errors.

Martinez W; Lo B

2008-07-01

123

Quantitative evaluation of expression difference in report assignments between nursing and radiologic technology departments.  

UK PubMed Central (United Kingdom)

Our purpose in this study was to investigate the expression differences in report assignments between students in nursing and radiologic technology departments. We have known that faculties could identify differences, such as word usage, through grading their students' assignments. However, there are no reports in the literature dealing with expression differences in vocabulary usage in medical informatics education based on statistical techniques or other quantitative measures. The report assignment asked for students' opinions in the event that they found a rare case of a disease in a hospital after they graduated from professional school. We processed student report data automatically, and we applied the space vector model and TF/IDF (term frequency/inverse document frequency) scoring to 129 report assignments. The similarity-score distributions among the assignments for these two departments were close to normal. We focused on the sets of terms that occurred exclusively in either department. For terms such as "radiation therapy" or "communication skills" that occurred in the radiologic technology department, the TF/IDF score was 8.01. The same score was obtained for terms such as "privacy guidelines" or "consent of patients" that occurred in the nursing department. These results will help faculties to provide a better education based on identified expression differences from students' background knowledge.

Nishimoto N; Yokooka Y; Yagahara A; Uesugi M; Ogasawara K

2011-01-01

124

Rank-Minimization for balanced assignment of subjects in clinical trials.  

UK PubMed Central (United Kingdom)

Minimization (M) is the most popular algorithm for balancing large numbers of subject variables in treatment groups of small clinical trials. However, its use has been limited because of its complexity, vulnerability to selection bias and lack of a generally accepted method for statistical analysis of the data. Rank-Minimization (RM) is a promising new algorithm. It is less complex since it does not require unique programming for each clinical trial to convert continuous to categorical variables. In this study RM is compared to M for balance of variables and vulnerability to selection bias in 1000 simulated trials using 200 subjects with 15 continuous variables. With RM there were no instances of significant imbalance to cause rejection of the null hypothesis, i.e. a Student's t> or =2, although it occurred in 0.4% of the 15000 tests for M. For moderate imbalance, i.e. 1< or = t < 2, the figures were 3% (RM) and 12% (M). The probability of guessing the next assignment was 0.636 (RM) and 0.683 (M). The smaller figure is superior to that of restricted randomization in blocks of five per treatment group. Improvement in balance, a decrease in vulnerability to selection bias and ease of application along with improvements in the statistical analysis should result in the general acceptance of RM for assigning subjects to treatment groups in clinical trials.

Stigsby B; Taves DR

2010-03-01

125

Assignment of element and isotope factors  

International Nuclear Information System (INIS)

Element and isotope factors are assigned in the NICS internal accounting system at the Exxon Fuel Fabrication Facility on the basis of coded information included on the material transfer documents. This paper explains more fully the manner in which NICS assigns these factors

1983-11-04

126

Stress Assignment in Reading Italian Polysyllabic Pseudowords  

Science.gov (United States)

In 4 naming experiments we investigated how Italian readers assign stress to pseudowords. We assessed whether participants assign stress following distributional information such as stress neighborhood (the proportion and number of existent words sharing orthographic ending and stress pattern) and whether such distributional information affects…

Sulpizio, Simone; Arduino, Lisa S.; Paizi, Despina; Burani, Cristina

2013-01-01

127

Airport Gate Assignment: New Model and Implementation  

CERN Document Server

Airport gate assignment is of great importance in airport operations. In this paper, we study the Airport Gate Assignment Problem (AGAP), propose a new model and implement the model with Optimization Programming language (OPL). With the objective to minimize the number of conflicts of any two adjacent aircrafts assigned to the same gate, we build a mathematical model with logical constraints and the binary constraints, which can provide an efficient evaluation criterion for the Airlines to estimate the current gate assignment. To illustrate the feasibility of the model we construct experiments with the data obtained from Continental Airlines, Houston Gorge Bush Intercontinental Airport IAH, which indicate that our model is both energetic and effective. Moreover, we interpret experimental results, which further demonstrate that our proposed model can provide a powerful tool for airline companies to estimate the efficiency of their current work of gate assignment.

Li, Chendong

2008-01-01

128

Wavelength and fiber assignment problems on avionic networks  

DEFF Research Database (Denmark)

This paper solves the wavelength and fiber assignment problems with systems' isolation requirements on the avionic ring networks. The experiment results give a general glace of the numbers of the wavelengths and fibers are required under certain scale of networks. At the beginning of increasing system isolation requirements on the networks with shorter span traffics will not greatly increase the wavelength consumption and it will grow faster after the isolation constrains being larger up to certain scale. Regarding the traffics with longer span, the system isolation constrains slowly cause the increase of the used wavelengths. Under all situations, the fiber consumption are mainly changed according to the system isolation constrains.

Zhang, Jiang; An, Yi

2011-01-01

129

Proton resonance assignments of horse ferricytochrome c  

International Nuclear Information System (INIS)

Two-dimensional nuclear magnetic resonance spectroscopy (2D NMR) was used to obtain extensive resonance assignments in the 1H NMR spectrum of horse ferricytochrome c. Assignments were made for the main-chain and C? protons of 102 residues (all except Pro-44 and Gly-84) and the majority of side-chain protons. As starting points for the assignment of the oxidized protein, a limited set of protons was initially assigned by use of 2D NMR magnetization transfer methods to correlate resonances in the oxidized form with assigned resonances in the reduced form. Given the complexity of the spectrum due to the size of this protein (104 residues) and its paramagnetic center, the initial search for side-chain spin systems in J-correlated spectra was successful only for the simplest side chains, but the majority of NH-C?H-C?H subspin systems (NAB sets) could be identified at this stage. The subsequent search for sequential NOE connectivities focused on NAB sets, with use of previously assigned residues to place NOE-connected segments within the amino acid sequence. Selective proton labeling of either the slowly or the rapidly exchanging amide sites was used to simplify the spectra, and systematic work at two temperatures was used to resolve ambiguities in the 2D NMR spectra. These approaches, together with the use of magnetization transfer methods to correlate reduced and oxidized cytochrome c spectra, provide multiple cross-checks to verify assignments.

1989-01-01

130

AUTO : Disassembly of a car engine. A first year assignment. Aarhus School of Architecture 2010  

DEFF Research Database (Denmark)

AUTO is the first assignment that the students of Architecture are introduced to at the Aarhus school of Architecture. The aim is to give students an understanding of design through a generic working method. This by disassembling a car engine and staging its components through a series of castings in plaster. The assignment can be as an implementation of a research into teaching. Thus the study method is based on a generative research method that the present author acquired while conducting research work for a Ph.D project.

Gammelgaard Nielsen, Anders; Aagaard, Tine

2011-01-01

131

Occupational Code Assignment System (CodeSearch)  

Science.gov (United States)

The Codesearch System is a PC-based system which provides users with an interactive method for assigning standardized industry and occupation codes to related job description titles from specific studies.

132

Inequity of patient assignments: fact or fiction?  

UK PubMed Central (United Kingdom)

The leadership group of the medical/surgical intensive care unit at Children's Hospital Boston, working within the healthy work environment guidelines of the American Association for Critical-Care Nurses, heard that some staff nurses thought that their patient care assignments were unfair; specifically, certain nurses always received a single assignment while other nurses always received a double assignment. The nurses' concerns were validated and addressed, and unit leaders continue to monitor the nurses' concerns, which has resulted in more equitable assignments. Acknowledging the concerns of staff nurses is a positive first step in maintaining a healthy work environment. Staff nurses' voices were heard, and their voices resulted in a positive change in the unit that embraced a healthy work environment and supported patient care.

Marine K; Meehan P; Lyons AC; Curley MA

2013-04-01

133

Agent-Oriented Business Rules: Deontic Assignments  

UK PubMed Central (United Kingdom)

Business rules are statements that express a businesspolicy, such as defining business terms, defining deonticassignments (of powers, rights and duties), anddefining or constraining the operations of an enterprise,in a declarative manner. In this paper we focuson deontic assignments.

Kuldar Taveter; Gerd Wagner

134

Using Electronic Repositories as a Student Resource for MSE Applications  

Science.gov (United States)

In the majority of engineering disciplines, MSE provides resources and applications with many other areas of engineering, e.g., design, structures, mechanics, and manufacturing. For the students to transfer and implement their MSE knowledge, they must have easy access to all their information. The eportfolio is a repository of the students entire academic MSE content and provides a wealth of knowledge applicable to all engineering disciplines. This repository combines not only lecture and textbook material, but also every assignment (in assessed format), all quizzes (with answers) laboratory activities (in audiovisual format), student oral presentations (podcast), and lectures in asynchronous format. This allows all of the data and information accumulated by students throughout their varying MSE course collected in one place, and is able to act as a quick resource and information kit for future use as the eportfolio is quickly accessed. Student and graduate responses have been positive especially for those in the workforce who require immediate and correct information.

Blicblau, Aaron

2009-09-22

135

Success in Blinding to Group Assignment With Sham-CPAP.  

Science.gov (United States)

This study evaluated the success of sham-continuous positive airway pressure (CPAP) as a placebo in a 4-week clinical trial of adults with sleep apnea. Participants (n = 23) were previously undiagnosed for obstructive sleep apnea, had no one in their household on sleep apnea therapy, and were willing to be randomly assigned to either active or sham-CPAP. Before final debriefing, participants were asked to "guess" their group assignment. When questioned, 10 of the 23 participants (44%) were incorrect in their guess of group assignment; 2 of these participants stated that their guess was "random." The active CPAP group's average usage was significantly longer when compared to participants on the sham device (293 ± 117 min/day vs. 188 ± 110 min/day, p = .046). The results suggest that participants remained blinded to group assignment and that sham-CPAP is an appropriate placebo control device. Participants' lower adherence to the sham device may be a potential problem that requires attention in the use of sham-CPAP as a placebo during clinical trials. PMID:23034539

Chasens, Eileen R; Drumheller, Oliver J; Strollo, Patrick J

2012-10-02

136

Distributed Frequency Assignment Using Hierarchical Cooperative Multi-Agent System  

Directory of Open Access Journals (Sweden)

Full Text Available Recent demand for wireless communication continues to grow rapidly as a result of the increasing number of users, the emergence of new user requirements, and the trend to new access technologies. At the same time, the electromagnetic spectrum or frequencies allocated for this purpose are still limited. This makes solving the frequency assignment problem more and more critical. In this paper, a new approach is proposed using self-organizing multi-agent systems to solve distributed dynamic channel-assignment; it concerns distribution among agents which task is to assign personal station to frequencies with respect to well known constraints. Agents only know their variables and the constraints affecting them, and have to negotiate to find a collective solution. The approach is based on a macro-level management taking the form of a hierarchical group of distributed agents in the network and handling all RANs (Regional Radio Access Network) in a localized region regardless of the operating band. The approach defines cooperative self-organization as the process leading the collective to the solution: agents can change the organization by their own decision to improve the state of the system. Our approach has been tested on PHEADEPHIA benchmarks of frequency assignment Problem. The results obtained are equivalent to those of current existing methods with the benefits that our approach shows more efficiency in terms of flexibility and autonomy.

Jamal Elhachimi; Zouhair Guenoun

2011-01-01

137

Dynamic traffic assignment for urban road networks  

Energy Technology Data Exchange (ETDEWEB)

This paper describes a dynamic traffic assignment (DTA) algorithm for urban road networks. The DTA algorithm is intended for application to large transportation planning networks with flow dependent travel costs and multiple origin and destination zones. The static user-equilibrium assignment problem (SUE) is a nonlinear programming problem with linear constraints that is typically solved by methods of linear combinations. The dynamic user-equilibrium assignment problem with multiple origins and destinations (DUE) is a nonlinear programming problem with nonlinear constraints that cannot be solved by these methods. Moreover, the constraints needed to ensure temporal flow continuity at the nodes cannot be properly specified within DUE. DTA is not a solution algorithm for DUE, but was designed instead to produce assignments that approximate the optimality conditions of DUE. Alternative approaches to dynamic assignment are discussed, including those that have been formulated as optimization problems and others that have been developed to simulate or approximate observed traffic conditions. Test results presented in this paper show that DTA generates both static and dynamic assignments that approximately satisfy the user-equilibrium conditions of those problems. 23 refs., 2 figs., 3 tabs.

Janson, B.N. (Oak Ridge National Lab., TN (USA))

1989-07-01

138

The Weapon-Target Assignment Problem  

UK PubMed Central (United Kingdom)

This report briefly describes the weapon-threat assignment problem. This is a specialcase of the more general optimal resource allocation problem, which is an actual real-timedefence industry problem with a large number of military appplications. It is indicatedhow an appropriate simplified simulation model can be constructed. A previous study, thatsolved the problem using a genetic algorithm, is briefly reviewed. No attempt is made tosolve the problem here. However, it is suggested that this problem is a good candidatefor the testbed that is required for the last part of the CALMA study, which will be acomparative evaluation of the different optimization techniques that were studied and/ordeveloped in the earlier stages of this project. The outcome of this comparative study maylead to a better understanding of the applicability of these methods.4Het optimaal gebruik van verdedigingsmiddelenA. Toet en H. de WaardSAMENVATTINGEr zijn tegenwoordig verscheidene combinatorische optimalizatietechnieken beschikbaar.De meeste daarvan zijn niet volledig getest op realistische problemen. Het EUCLID (EUropeanCooperation for the Long term In Defence) CALMA (Combinatorial Algorithmsfor Military Applications) RTP (Research and Technology Project) 6.4 project heeft alsvoornaamste doel het onderzoeken van de bruikbaarheid van verschillende bestaande combinatorischeoptimalizatie technieken voor het oplossen van complexe combinatorischeproblemen zoals die voorkomen in militaire omgevingen.Dit rapport geeft een beknopte beschrijving van het wapen-doel toekennings probleem.Dit is een speciaal geval van het meer algemene probleem van het optimale gebruikvan beschikbare middelen. Er wordt kort aangegeven hoe een geschikt vereenvoudigdsimulatie model kan worden gecon...

Alexander Toet; Huub Waard

139

A preliminary assessment of the assignment of Intermediate Level Waste streams to designs of transport containers  

International Nuclear Information System (INIS)

[en] This paper considers the assignment of ILW to designs of transport container. Estimates are made of the radiation levels penetrating the transport containers and assesses the duration of any storage required prior to transportation. (author)

1984-01-01

140

Flexible taxonomic assignment of ambiguous sequencing reads  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background To characterize the diversity of bacterial populations in metagenomic studies, sequencing reads need to be accurately assigned to taxonomic units in a given reference taxonomy. Reads that cannot be reliably assigned to a unique leaf in the taxonomy (ambiguous reads) are typically assigned to the lowest common ancestor of the set of species that match it. This introduces a potentially severe error in the estimation of bacteria present in the sample due to false positives, since all species in the subtree rooted at the ancestor are implicitly assigned to the read even though many of them may not match it. Results We present a method that maps each read to a node in the taxonomy that minimizes a penalty score while balancing the relevance of precision and recall in the assignment through a parameter q. This mapping can be obtained in time linear in the number of matching sequences, because LCA queries to the reference taxonomy take constant time. When applied to six different metagenomic datasets, our algorithm produces different taxonomic distributions depending on whether coverage or precision is maximized. Including information on the quality of the reads reduces the number of unassigned reads but increases the number of ambiguous reads, stressing the relevance of our method. Finally, two measures of performance are described and results with a set of artificially generated datasets are discussed. Conclusions The assignment strategy of sequencing reads introduced in this paper is a versatile and a quick method to study bacterial communities. The bacterial composition of the analyzed samples can vary significantly depending on how ambiguous reads are assigned depending on the value of the q parameter. Validation of our results in an artificial dataset confirm that a combination of values of q produces the most accurate results.

Clemente José C; Jansson Jesper; Valiente Gabriel

2011-01-01

 
 
 
 
141

Special Issues Analysis Center (SIAC). Annual Report: Year Three. Volume VII: Task D160 Report--State Certification Requirements for Teachers of Limited English Proficient Students. Task D210 Report--Inclusion of Limited English Proficient Students in State Performance Standards and Assessments.  

Science.gov (United States)

Two reports concerning the education of limited-English-proficient students are presented. The Task D160 report presents information on current and planned state certification requirements for bilingual education and English-as-a-Second-Language (ESL) teachers, and the ways in which these requirements address or do not address the challenge of…

Fleischman, Howard L.; And Others

142

Protein secondary structure assignment revisited: a detailed analysis of different assignment methods  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background A number of methods are now available to perform automatic assignment of periodic secondary structures from atomic coordinates, based on different characteristics of the secondary structures. In general these methods exhibit a broad consensus as to the location of most helix and strand core segments in protein structures. However the termini of the segments are often ill-defined and it is difficult to decide unambiguously which residues at the edge of the segments have to be included. In addition, there is a "twilight zone" where secondary structure segments depart significantly from the idealized models of Pauling and Corey. For these segments, one has to decide whether the observed structural variations are merely distorsions or whether they constitute a break in the secondary structure. Methods To address these problems, we have developed a method for secondary structure assignment, called KAKSI. Assignments made by KAKSI are compared with assignments given by DSSP, STRIDE, XTLSSTR, PSEA and SECSTR, as well as secondary structures found in PDB files, on 4 datasets (X-ray structures with different resolution range, NMR structures). Results A detailed comparison of KAKSI assignments with those of STRIDE and PSEA reveals that KAKSI assigns slightly longer helices and strands than STRIDE in case of one-to-one correspondence between the segments. However, KAKSI tends also to favor the assignment of several short helices when STRIDE and PSEA assign longer, kinked, helices. Helices assigned by KAKSI have geometrical characteristics close to those described in the PDB. They are more linear than helices assigned by other methods. The same tendency to split long segments is observed for strands, although less systematically. We present a number of cases of secondary structure assignments that illustrate this behavior. Conclusion Our method provides valuable assignments which favor the regularity of secondary structure segments.

Martin Juliette; Letellier Guillaume; Marin Antoine; Taly Jean-François; de Brevern Alexandre G; Gibrat Jean-François

2005-01-01

143

Stress assignment in reading Italian polysyllabic pseudowords.  

Science.gov (United States)

In 4 naming experiments we investigated how Italian readers assign stress to pseudowords. We assessed whether participants assign stress following distributional information such as stress neighborhood (the proportion and number of existent words sharing orthographic ending and stress pattern) and whether such distributional information affects naming speed. Experiments 1 and 2 tested how readers assign stress to pseudowords. The results showed that participants assign stress on the basis of the pseudowords' stress neighborhood, but only when this orthographic/phonological information is widely represented in the lexicon. Experiments 3 and 4 tested the naming speed of pseudowords with different stress patterns. Participants were faster in reading pseudowords with antepenultimate than with penultimate stress. The effect was not driven by distributional information, but it was related to the stage of articulation planning. Overall, the experiments showed that, under certain conditions, readers assign stress using orthographic/phonological distributional information. However, the distributional information does not speed up pseudoword naming, which is affected by stress computation at the level of the articulation planning of the stimulus. It is claimed that models of reading aloud and speech production should be merged at the level of phonological encoding, when segmental and metrical information are assembled and articulation is planned. PMID:22612167

Sulpizio, Simone; Arduino, Lisa S; Paizi, Despina; Burani, Cristina

2012-05-21

144

Stress assignment in reading Italian polysyllabic pseudowords.  

UK PubMed Central (United Kingdom)

In 4 naming experiments we investigated how Italian readers assign stress to pseudowords. We assessed whether participants assign stress following distributional information such as stress neighborhood (the proportion and number of existent words sharing orthographic ending and stress pattern) and whether such distributional information affects naming speed. Experiments 1 and 2 tested how readers assign stress to pseudowords. The results showed that participants assign stress on the basis of the pseudowords' stress neighborhood, but only when this orthographic/phonological information is widely represented in the lexicon. Experiments 3 and 4 tested the naming speed of pseudowords with different stress patterns. Participants were faster in reading pseudowords with antepenultimate than with penultimate stress. The effect was not driven by distributional information, but it was related to the stage of articulation planning. Overall, the experiments showed that, under certain conditions, readers assign stress using orthographic/phonological distributional information. However, the distributional information does not speed up pseudoword naming, which is affected by stress computation at the level of the articulation planning of the stimulus. It is claimed that models of reading aloud and speech production should be merged at the level of phonological encoding, when segmental and metrical information are assembled and articulation is planned.

Sulpizio S; Arduino LS; Paizi D; Burani C

2013-01-01

145

A mentor-based portfolio program to evaluate pharmacy students' self-assessment skills.  

UK PubMed Central (United Kingdom)

Objective. To evaluate pharmacy students' self-assessment skills with an electronic portfolio program using mentor evaluators. Design. First-year (P1) and second-year (P2) pharmacy students used online portfolios that required self-assessments of specific graded class assignments. Using a rubric, faculty and alumni mentors evaluated students' self-assessments and provided feedback. Assessment. Eighty-four P1 students, 74 P2 students, and 59 mentors participated in the portfolio program during 2010-2011. Both student groups performed well overall, with only a small number of resubmissions required. P1 students showed significant improvements across semesters for 2 of the self-assessment questions; P2 students' scores did not differ significantly. The P1 scores were significantly higher than P2 scores for 3 questions during spring 2011. Mentors and students had similar levels of agreement with the extent to which students put forth their best effort on the self-assessments. Conclusion. An electronic portfolio using mentors based inside and outside the school provided students with many opportunities to practice their self-assessment skills. This system represents a useful method of incorporating self-assessments into the curriculum that allows for feedback to be provided to the students.

Kalata LR; Abate MA

2013-05-01

146

A Useful Metaheuristic for Dynamic Channel Assignment in Mobile Cellular Systems  

Directory of Open Access Journals (Sweden)

Full Text Available The prime objective of a Channel Assignment Problem (CAP) is to assign appropriate number of required channels to each cell in a way to achieve both efficient frequency spectrum utilization and minimization of interference effects (by satisfying a number of channel reuse constraints). Dynamic Channel Assignment (DCA) assigns the channels to the cells dynamically according to traffic demand, and hence, can provide higher capacity (or lower call blocking probability), fidelity and quality of service than the fixed assignment schemes. Channel assignment algorithms are formulated as combinatorial optimization problems and are NP-hard. Devising a DCA, that is practical, efficient, and which can generate high quality assignments, is challenging. Though Metaheuristic Search techniques like Evolutionary Algorithms, Differential Evolution, Particle Swarm Optimization prove effective in the solution of Fixed Channel Assignment (FCA) problems but they still require high computational time and therefore may be inefficient for DCA. A number of approaches have been proposed for the solution of DCA problem but the high complexity of these proposed approaches makes them unsuitable/less efficient for practical use. Therefore, this paper presents an effective and efficient Hybrid Discrete Binary Differential Evolution Algorithm (HDB-DE) for the solution of DCA Problem

Deepak Kumar Singh; K. Srinivas; D. Bhagwan Das

2012-01-01

147

Flexible Issue Slot Assignment for VLIW Architectures  

UK PubMed Central (United Kingdom)

this paper, we present a method for representing such placement constraints using the concept ofresources and reservation tables. In our approach, conict-free placement congurations are modelled usingreplicated virtual resources, and the standard methods for manipulating reservation tables are used to checkthe feasibility of a slot assignment. We present a formulation of the slot assignment problem which is thenmapped to a resource-based model, we demonstrate the equivalence of both representations, and we presentthe resource-based model of the current TriMedia architecture obtained using our approach. Finally, weoutline several immediate applications of the method for the current TriMedia architecture and software.

Christine Eisenbeis; Zbigniew Chamski; Philips Natlab; Prof Holstlaan; Erven Rohou

148

Complete Proton and Carbon Assignment of Triclosan via One- and Two- Dimensional Nuclear Magnetic Resonance Analysis  

Science.gov (United States)

Students from an upper-division undergraduate spectroscopy class analyzed one- and two-dimensional 400 MHz NMR spectroscopic data from triclosan in CDCl3. Guided assignment of all proton and carbon signals was completed via 1D proton and carbon, nuclear Overhauser effect (nOe), distortionless enhanc...

149

A Statistical Process Control Approach to Homework Assignments (or, Practicing What We Preach).  

Science.gov (United States)

|Describes a process in which problems randomly selected from assigned homework sets are used as quizzes. Students take the quizzes seriously because advance knowledge makes their studying effective. Grading is simplified and the motivation for low effort in homework completion is removed. (SK)|

Miller, Janis L.

1996-01-01

150

Dynamic Weapon-Target Assignment Problem.  

Science.gov (United States)

We present a progress report on our recent results on the dynamic version of the Weapon to Target Assignment (WTA) problem. In this paper we will present result for the Asset-Based problem. In the static Asset-Based WTA problem, the offense launches missi...

M. Athans P. Hosein

1989-01-01

151

Product due date assignment for complex assemblies.  

Digital Repository Infrastructure Vision for European Research (DRIVER)

A method is described to assign product due dates for multistage assemblies with uncertain manufacturing and assembly process times. Earliest start times of operations are specified by a predetermined production plan and processing time distributions for operations are truncated at minimum processin...

D.P. Song; C Hicks; C.F. Earl

152

New Assignation Methods of Workers on Jobs  

Directory of Open Access Journals (Sweden)

Full Text Available In this paper we shall give a new solution for the optimal assignation of workers on jobs from the point of viewof minimization the maximal execution time using the simplex algorithm which can solve the problem using computersinstead the known graphical solution.

C?t?lin Angelo IOAN

2009-01-01

153

Tabu search for target-radar assignment  

DEFF Research Database (Denmark)

In the paper the problem of assigning air-defense illumination radars to enemy targets is presented. A tabu search metaheuristic solution is described and the results achieved are compared to those of other heuristic approaches, implementation and experimental aspects are discussed. It is argued that tabu search could be used in near real-time decision making systems

Hindsberger, Magnus; Vidal, Rene Victor Valqui

2000-01-01

154

Traffic Assignment and Gibbs-Maslov Semirings  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The Traffic Assignment problem consists in determining the routes used by sets of network users taking into account the link congestions. In deterministic modelling, Wardrop Equilibriums are computed. They can be reduced to huge non-linear multiflow problems in the simplest cases. In stochastic mode...

Lotito, Pablo; Mancinelli, Elina; Quadrat, Jean-Pierre

155

Credit assignment during movement reinforcement learning.  

UK PubMed Central (United Kingdom)

We often need to learn how to move based on a single performance measure that reflects the overall success of our movements. However, movements have many properties, such as their trajectories, speeds and timing of end-points, thus the brain needs to decide which properties of movements should be improved; it needs to solve the credit assignment problem. Currently, little is known about how humans solve credit assignment problems in the context of reinforcement learning. Here we tested how human participants solve such problems during a trajectory-learning task. Without an explicitly-defined target movement, participants made hand reaches and received monetary rewards as feedback on a trial-by-trial basis. The curvature and direction of the attempted reach trajectories determined the monetary rewards received in a manner that can be manipulated experimentally. Based on the history of action-reward pairs, participants quickly solved the credit assignment problem and learned the implicit payoff function. A Bayesian credit-assignment model with built-in forgetting accurately predicts their trial-by-trial learning.

Dam G; Kording K; Wei K

2013-01-01

156

Towards an intelligent system for the automatic assignment of domains in globular proteins  

Energy Technology Data Exchange (ETDEWEB)

The automatic identification of protein domains from coordinates is the first step in the classification of protein folds and hence is required for databases to guide structure prediction. Most algorithms encode a single concept based and sometimes do not yield assignments that are consistent with the generally accepted perception. Our development of an automatic approach to identify reliably domains from protein coordinates is described. The algorithm is benchmarked against a manual identification of the domains in 284 representative protein chains. The first step is the domain assignment by distance (DAD) algorithm that considers the density of inter-residue contacts represented in a contact matrix. The algorithm yields 85% agreement with the manual assignment. The paper then considers how the reliability of these assignments could be evaluated. Finally the use of structural comparisons using the STAND algorithm to validate domain assignment is reported on a test case.

Sternberg, M.J.E.; Hegyi, H.; Islam, S.A.; Luo, J.; Russell, R.B. [Imperial Cancer Research Fund, London (United Kingdom)

1995-12-31

157

Systematic assignment of thermodynamic constraints in metabolic network models  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background The availability of genome sequences for many organisms enabled the reconstruction of several genome-scale metabolic network models. Currently, significant efforts are put into the automated reconstruction of such models. For this, several computational tools have been developed that particularly assist in identifying and compiling the organism-specific lists of metabolic reactions. In contrast, the last step of the model reconstruction process, which is the definition of the thermodynamic constraints in terms of reaction directionalities, still needs to be done manually. No computational method exists that allows for an automated and systematic assignment of reaction directions in genome-scale models. Results We present an algorithm that – based on thermodynamics, network topology and heuristic rules – automatically assigns reaction directions in metabolic models such that the reaction network is thermodynamically feasible with respect to the production of energy equivalents. It first exploits all available experimentally derived Gibbs energies of formation to identify irreversible reactions. As these thermodynamic data are not available for all metabolites, in a next step, further reaction directions are assigned on the basis of network topology considerations and thermodynamics-based heuristic rules. Briefly, the algorithm identifies reaction subsets from the metabolic network that are able to convert low-energy co-substrates into their high-energy counterparts and thus net produce energy. Our algorithm aims at disabling such thermodynamically infeasible cyclic operation of reaction subnetworks by assigning reaction directions based on a set of thermodynamics-derived heuristic rules. We demonstrate our algorithm on a genome-scale metabolic model of E. coli. The introduced systematic direction assignment yielded 130 irreversible reactions (out of 920 total reactions), which corresponds to about 70% of all irreversible reactions that are required to disable thermodynamically infeasible energy production. Conclusion Although not being fully comprehensive, our algorithm for systematic reaction direction assignment could define a significant number of irreversible reactions automatically with low computational effort. We envision that the presented algorithm is a valuable part of a computational framework that assists the automated reconstruction of genome-scale metabolic models.

Kümmel Anne; Panke Sven; Heinemann Matthias

2006-01-01

158

Breaking the time barrier: helping students "find the time" to do intergenerational service-learning.  

UK PubMed Central (United Kingdom)

This study addresses issues related to mandatory versus optional service-learning assignments and presents findings from a study of an option-based service-learning program. Using qualitative data collected from students over two semesters, this study examines one of the biggest barriers students cite to successful participation in service-learning options--"not having enough time." Typically, time constraints manifest themselves in one of two ways: first is students who elect not to participate in the service-learning option because they do not see the required time commitment as feasible; a second concern is the small percentage of students who have difficulty completing the hours for which they have signed up. With the majority of students employed part- or even full-time in addition to their school work, these time barriers are not surprising. A variety of strategies to help students "find the time" to do service-learning are explored.

Karasik RJ

2005-01-01

159

Study on Optimization of Railway Passenger Train Sets Assignment  

Directory of Open Access Journals (Sweden)

Full Text Available The passenger train sets is the carrier of railway passenger transport production and reasonable use of the passenger train sets is one of the key goals of railway transportation plan. In order to improve the operation efficiency of passenger train sets, optimization model of railway passenger train sets assignment have been built to minimize the non-production staying time of passenger train sets at passenger station based on established train diagram and established configuration of train sets system. On that basis, considering that the parameters of simulated Annealing Algorithm (SA) directly affect the efficiency and precision of solving, SA parameters is optimized based on nested partitions, then improved simulated annealing algorithm (ISA) is designed to solve this model. Finally, a case study has been carried out taking Zhengzhou railway station of china as an example in order to testify validity of this model and its algorithm by using calculating and comparing analysis and further solved practical problems is analyzed. The results show that the number of passenger train sets required and carriage staying time at passenger station are reduced and this model and its algorithm can be used to optimize railway passenger train sets assignment to improve efficiency of railway passenger train sets assignment.

Changfeng Zhu; Deyuan Liu; Linna Cheng; Haijun Li

2013-01-01

160

Heuristic Spectrum Assignment Algorithm in Distributed Cognitive Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Cognitive radio is an exciting emerging technology that has the potential of dealing with the urgent requirement and scarcity of the radio spectrum. Although having multiple radio interfaces and available spectrum bands can generally increase the effective throughput, a problem arises as to what the best strategy to dynamically assign available bands to secondary users for maximizing throughput by minimizing the interference, and what the best scheme to allocate the spectrum holes to unlicensed users to maximize the fairness. This paper presents a distributed and heuristic spectrum assignment algorithm for multi-radio wireless cognitive networks in a cognitive network environment. The proposed algorithm (Fairness Bargaining with Maximum throughput, FBMT) considers the problems including system throughput and the fairness. Extensive simulation studies in 802.11 based multi-radio cognitive networks have been performed. The results indicate that the proposed algorithm can facilitate a large increase in network throughput and acquire a good fairness performance in comparison with a common spectrum assignment mechanism that is used as a benchmark in the literature.

Li Yu; Cong Liu; Zuhao Liu; Wenyu Hu

2010-01-01

 
 
 
 
161

Fixed Channel Assignment and Neural Network Algorithm for Channel Assignment Problem in Cellular Radio Networks  

Directory of Open Access Journals (Sweden)

Full Text Available The channel-assignment problem is important in mobile telephone communication. Since the usable range of the frequency spectrum is limited, the optimal channel-assignment problem has become increasingly important. The goal of this problem is to find a channel assignment to requested calls with the minimum number of channels subject to interference constraints between channels. This algorithm consists of: 1) the fixed channel assignment stage; 2) the neural network stage. In the first stage, the calls in a cell determining the lower bound on the total number of channels are assigned channels at regular intervals, then the calls in adjacent six cells are assigned channels by a cluster heuristic method sequentially. In the second stage, the calls in the remaining cells are assigned channels by a binary neural network. The performance is verified through solving well-known benchmark problems. Especially for Sivarajan’s benchmark problems, my algorithm first achieves the lower bound solutions in all of the 12 instances.

Omid Moradi

2010-01-01

162

Gender Assignment in Danish, Swedish and Norwegian: A Comparison of the Status of Assignment Criteria  

Directory of Open Access Journals (Sweden)

Full Text Available The paper deals with gender assignment of English loanwords in Danish, Swedish and Norwegian. The following assignment criteria have been analysed: semantic (animate, mass), phonological (number of syllables, homonymy), and morphological (inflection, suffixation, deverbal monosyllables, compounds). Common gender in Danish and Swedish and masculine in Norwegian are overrepresented in comparison with the native lexicon. This is confirmed by discriminant function analysis, which shows that neuter nouns in the three languages and feminine nouns in Norwegian show fewer characteristic features. This analysis has also been used to measure the degree of regularity based on the postulated criteria: the percentage of correctly classified cases (from 67% in Swedish to 68% in Norwegian and 72% in Danish) suggests only a partial regularity in gender assignment. The stronger pull of common or masculine gender is reflected in the contribution of selected assignment rules, particularly in the assignment of animates, where common or masculine nouns constitute 96% of assigned nouns. As regards phonological rules, monosyllables show a slightly better correlation with neuter gender, particularly in Danish. Homonymy is significant for nouns of both genders in Danish, while in Swedish and Norwegian nouns with a native neuter or feminine homonym are more likely to be assigned common or masculine gender. Likewise, most inflectional and derivational assignment rules contribute to the assignment of common or masculine genders, with the exception of zero plurals, Swedish n-plurals, suffixes such as -ment, -ery, deverbal monosyllables in Danish and Norwegian, and compounds whose base appears in the corpus with n. gender. Discriminant function analysis shows that plural inflection has the greatest discriminant power among the postulated criteria. Finally, it is suggested that these tendencies may indicate an ongoing expansion of common and masculine genders in the three Scandinavian languages.

Marcin Kilarski

2003-01-01

163

Robust structure-based resonance assignment for functional protein studies by NMR  

International Nuclear Information System (INIS)

High-throughput functional protein NMR studies, like protein interactions or dynamics, require an automated approach for the assignment of the protein backbone. With the availability of a growing number of protein 3D structures, a new class of automated approaches, called structure-based assignment, has been developed quite recently. Structure-based approaches use primarily NMR input data that are not based on J-coupling and for which connections between residues are not limited by through bonds magnetization transfer efficiency. We present here a robust structure-based assignment approach using mainly HN-HN NOEs networks, as well as 1H-15N residual dipolar couplings and chemical shifts. The NOEnet complete search algorithm is robust against assignment errors, even for sparse input data. Instead of a unique and partly erroneous assignment solution, an optimal assignment ensemble with an accuracy equal or near to 100% is given by NOEnet. We show that even low precision assignment ensembles give enough information for functional studies, like modeling of protein-complexes. Finally, the combination of NOEnet with a low number of ambiguous J-coupling sequential connectivities yields a high precision assignment ensemble. NOEnet will be available under: http://www.icsn.cnrs-gif.fr/download/nmrhttp://www.icsn.cnrs-gif.fr/download/nmr.

2010-01-01

164

A Framework for Participatory Science in High Schools that Supports Useful Scientific Research as Well as Student Learning: Requirements and Constraints  

Science.gov (United States)

For the past five years the Schoodic Education and Research Center (SERC) Institute, located at Acadia National Park, has collaborated with the Senator George J. Mitchell Center for Environmental and Watershed Research and Maine Sea Grant at the University of Maine to engage high school teachers and students in field work to collect samples and data used in a study of spatial patterns of mercury (Hg) and methylmercury (MeHg) across the northeastern US. This program's success in producing useful scientific research data at the same time that it achieves formal science education outcomes has resulted in new funding for both the scientific work and the education work. SERC Institute and the Mitchell Center have recently used the pedagogical and scientific framework underlying this work to address new research related to seasonal variation in nitrogen in watersheds, demonstrating that the framework has applicability beyond studies of Hg. This paper summarizes the core elements of the framework and reports on new research into student learning and teacher professional development that is essential to the success of this kind of participatory science. Specifically, this paper describes (1) approaches to structuring research designs to ensure that data collected by students is scientifically useful; (2) the need to assist teachers in supporting a research focus by students that differs from the research undertaken by working scientists; (3) pedagogical strategies to support this student research; (4) mechanisms to support peer review and publication of student research, creating over time a body of student work that supports new student research and that is a potentially useful resource for others; and (5) new research data related to student ability to use and make sense of the data that they collect. By connecting data on student data literacy with data collected from assessments of teacher content knowledge and pedagogical content knowledge, we are able to identify implications for teacher professional development. We conclude with a brief qualitative summary of our experiences with offering such professional development and a discussion of "next steps" emerging from these experiences.

Zoellick, B.; Nelson, S. J.; Bisson, B.; Schauffler, M.; Webber, H.

2011-12-01

165

Backbone resonance assignment and order tensor estimation using residual dipolar couplings  

International Nuclear Information System (INIS)

An NMR investigation of proteins with known X-ray structures is of interest in a number of endeavors. Performing these studies through nuclear magnetic resonance (NMR) requires the costly step of resonance assignment. The prevalent assignment strategy does not make use of existing structural information and requires uniform isotope labeling. Here we present a rapid and cost-effective method of assigning NMR data to an existing structure—either an X-ray or computationally modeled structure. The presented method, Exhaustively Permuted Assignment of RDCs (EPAR), utilizes unassigned residual dipolar coupling (RDC) data that can easily be obtained by NMR spectroscopy. The algorithm uses only the backbone N–H RDCs from multiple alignment media along with the amino acid type of the RDCs. It is inspired by previous work from Zweckstetter and provides several extensions. We present results on 13 synthetic and experimental datasets from 8 different structures, including two homodimers. Using just two alignment media, EPAR achieves an average assignment accuracy greater than 80%. With three media, the average accuracy is higher than 94%. The algorithm also outputs a prediction of the assignment accuracy, which has a correlation of 0.77 to the true accuracy. This prediction score can be used to establish the needed confidence in assignment accuracy.

2011-01-01

166

Speeding up sequence specific assignment of IDPs.  

UK PubMed Central (United Kingdom)

The characterization of intrinsically disordered proteins (IDPs) by NMR spectroscopy is made difficult by the extensive spectral overlaps. To overcome the intrinsic low-resolution of the spectra the introduction of high-dimensionality experiments is essential. We present here a set of high-resolution experiments based on direct (13)C-detection which proved useful in the assignment of ?-synuclein, a paradigmatic IDP. In particular, we describe the implementation of 4D HCBCACON, HCCCON, HCBCANCO, 4/5D HNCACON and HNCANCO and 3/4D HCANCACO experiments, specifically tailored for spin system identification and backbone resonances sequential assignment. The use of non-uniform-sampling in the indirect dimension and of the H-flip approach to achieve longitudinal relaxation enhancement rendered the experiments very practical.

Bermel W; Bertini I; Felli IC; Gonnelli L; Ko?mi?ski W; Piai A; Pierattelli R; Stanek J

2012-08-01

167

Baryon and Lepton Number Assignment in  

UK PubMed Central (United Kingdom)

In E 6 models there are new particles whose baryon number is notuniquely assigned. We point out that the baryon and lepton numberassignment to these particles can change the baryogenesis scenariosignificantly. We consider left-right symmetric extension of thestandard model in which (B Gamma L) quantum number is gauged. Theidentification of (B Gamma L) with a generator of E 6 is used to define thebaryon and lepton numbers for the exotic particles in a way that theelectroweak baryon and lepton number anomaly corresponding to theSU(2) L group vanishes, i.e., there is no non-perturbative baryon orlepton number violation during the electroweak phase transition. Westudy some consequences of the new assignment.1On sabbatical leave from Theory Group, Physical Research Laboratory, Ahmedabad -380009, India.2On leave from Physics Department, Niigata University, Niigata 950-21, JapanIn the standard model and its generalizations to Grand Unified Theories(GUTs) the quantum n...

Emmanuel A. Paschos; Utpal Sarkar

168

Proton resonance assignments of horse ferrocytochrome c  

International Nuclear Information System (INIS)

Two-dimensional nuclear magnetic resonance (NMR) spectroscopy was used to assign the proton resonances of horse ferrocytochrome c. Assignments were based on the main chain directed (MCD) and sequential assignment procedures. The fundamental units of the MCD approach, the main-chain NH-C?H-C?H J-coupled subspin systems of each amino acid residue (NAB sets), were defined by analysis of direct and relayed coherence transfer spectra. Recognition of main-chain NOE connectivity patterns specified in the MCD algorithm them allowed NAB sets to be aligned in their proper juxtaposition within secondary structural units. The units of secondary structure were placed within the polypeptide sequence of identification of a small number of side-chain J-coupled spin systems, found by direct recognition in 2D spectra of some J-coupled spin systems and by pairwise comparisons of the J-correlated spectra of six homologous cytochromes c having a small number of known amino acid differences. The placement of a given segment in this way defines the amino acid identity of all its NAB sets. This foreknowledge allowed the vast majority of the side-chain resonances to be discerned in J-correlated spectra. Extensive confirmation of the assignments derives internally from multiple main-chain NOE connectivities and their consistency following temperature-induced changes of the chemical shifts of NOE-correlated protons. The observed patterns of main-chain NOEs provide some structural information and suggest small but potentially significant differences between the solution structure observed by NMR and that defined earlier in crystallographic studies at 2.8-angstrom resolution.

1989-01-01

169

Channel Assignment via Fast Zeta Transform  

CERN Document Server

We show an O*((l+1)^n)-time algorithm for the channel assignment problem, where l is the maximum edge weight. This improves on the previous O*((l+2)^n)-time algorithm by Kral, as well as algorithms for important special cases, like L(2,1)-labelling. For the latter problem, our algorithm works in O*(3^n) time. The progress is achieved by applying the fast zeta transform in combination with the inclusion-exclusion principle.

Cygan, Marek

2011-01-01

170

Credit Assignment in Adaptive Evolutionary Algorithms  

CERN Multimedia

In this paper, a new method for assigning credit to search operators is presented. Starting with the principle of optimizing search bias, search operators are selected based on an ability to create solutions that are historically linked to future generations. Using a novel framework for defining performance measurements, distributing credit for performance, and the statistical interpretation of this credit, a new adaptive method is developed and shown to outperform a variety of adaptive and non-adaptive competitors.

Whitacre, James M; Sarker, Ruhul A; 10.1145/1143997.1144206

2009-01-01

171

Power Assignment Problems in Wireless Communication  

CERN Multimedia

A fundamental class of problems in wireless communication is concerned with the assignment of suitable transmission powers to wireless devices/stations such that the resulting communication graph satisfies certain desired properties and the overall energy consumed is minimized. Many concrete communication tasks in a wireless network like broadcast, multicast, point-to-point routing, creation of a communication backbone, etc. can be regarded as such a power assignment problem. This paper considers several problems of that kind; for example one problem studied before in \\cite{Carrots, Bilo} aims to select and assign powers to $k$ of the stations such that all other stations are within reach of at least one of the selected stations. We improve the running time for obtaining a $(1+\\epsilon)$-approximate solution for this problem from $n^{((\\alpha/\\epsilon)^{O(d)})}$ as reported by Bilo et al. (\\cite{Bilo}) to $O(n+ {(\\frac{k^{2d+1}}{\\epsilon^d})}^{\\min{\\{2k, (\\alpha/\\epsilon)^{O(d)} \\}}})$ that is, we obtain a ru...

Funke, S; Lotker, Z; Naujoks, R; Funke, Stefan; Laue, Soeren; Lotker, Zvi; Naujoks, Rouven

2006-01-01

172

Heuristic Algorithms for Assigning Hispanic Ethnicity  

Science.gov (United States)

We compared several techniques for assigning Hispanic ethnicity to records in data systems where this information may be missing, variously making use of country of origin, surname, race, and county of residence. We considered an algorithm in use by the North American Association of Central Cancer Registries (NAACCR), a variation of this developed by the authors, a “fast and frugal” algorithm developed with the aid of recursive partitioning methods, and conventional logistic regression. With the exception of logistic regression, each approach was rule-based: if specific criteria were met, an ethnicity assignment was made; otherwise, the next criterion was considered, until all records were assigned. We evaluated the algorithms on a sample of over 500,000 female clients from the New York State Cancer Services Program for whom self-reported Hispanic ethnicity was known. We found that all approaches yielded similarly high accuracy, sensitivity, and positive predictive value in all parts of the state, from areas with very low to very high Hispanic populations. An advantage of the fast and frugal method is that it consists of a small number of easily remembered steps.

Boscoe, Francis P.; Schymura, Maria J.; Zhang, Xiuling; Kramer, Rachel A.

2013-01-01

173

Heuristic algorithms for assigning Hispanic ethnicity.  

UK PubMed Central (United Kingdom)

We compared several techniques for assigning Hispanic ethnicity to records in data systems where this information may be missing, variously making use of country of origin, surname, race, and county of residence. We considered an algorithm in use by the North American Association of Central Cancer Registries (NAACCR), a variation of this developed by the authors, a "fast and frugal" algorithm developed with the aid of recursive partitioning methods, and conventional logistic regression. With the exception of logistic regression, each approach was rule-based: if specific criteria were met, an ethnicity assignment was made; otherwise, the next criterion was considered, until all records were assigned. We evaluated the algorithms on a sample of over 500,000 female clients from the New York State Cancer Services Program for whom self-reported Hispanic ethnicity was known. We found that all approaches yielded similarly high accuracy, sensitivity, and positive predictive value in all parts of the state, from areas with very low to very high Hispanic populations. An advantage of the fast and frugal method is that it consists of a small number of easily remembered steps.

Boscoe FP; Schymura MJ; Zhang X; Kramer RA

2013-01-01

174

An Algorithm for Fractional Assignment Problems  

UK PubMed Central (United Kingdom)

In this paper, we propose a polynomial time algorithm for fractionalassignment problems. The fractional assignment problem is interpreted as follows.Let G = (I; J; E) be a bipartite graph where I and J are vertex setsand E ` I 2 J is an edge set. We call an edge subset X(` E) assignmentif every vertex is incident to exactly one edge from X: Given an integer weightc ij and a positive integer weight d ij for every edge (i; j) 2 E; the fractionalassignment problem finds an assignment X(` E) such that the ratio(P(i;j)2X c ij )=(P(i;j)2X d ij ) is minimized.Our algorithm is based on the parametric approach and employs the approximatebinary search method. The time complexity of our algorithmis O(pnm log D log(nCD)) where jIj = jJ j = n; jEj = m; C =maxf1; maxfjc ij j : (i; j) 2 Egg and D = maxfd ij : (i; j) 2 Eg + 1:Key Words. Combinatorial Optimization, Mathematical Programming,Fractional Programming, Assignment Problems, Approximation Optimality,Parametric pro...

Maiko Shigeno; Yasufumi Saruwatari; Tomomi Matsui

175

Writing approaches of nursing students.  

UK PubMed Central (United Kingdom)

Over the past 20years, research has focused on the writing processes of college students, however, despite recent support for writing as a tool of reflection in nursing education, little is known about how it is that nursing students go about writing papers and assignments as part of their professional education. In order to determine the writing processes of nursing students, the Inventory of Processes in College Composition, a self-response questionnaire, was administered to 169 nursing students. Results support the independence of the writing approaches that nursing students use and similarity to the writing approaches of a general college student population.

Lavelle E; Ball SC; Maliszewski G

2013-01-01

176

Writing approaches of nursing students.  

Science.gov (United States)

Over the past 20years, research has focused on the writing processes of college students, however, despite recent support for writing as a tool of reflection in nursing education, little is known about how it is that nursing students go about writing papers and assignments as part of their professional education. In order to determine the writing processes of nursing students, the Inventory of Processes in College Composition, a self-response questionnaire, was administered to 169 nursing students. Results support the independence of the writing approaches that nursing students use and similarity to the writing approaches of a general college student population. PMID:22112918

Lavelle, Ellen; Ball, Susan C; Maliszewski, Genevieve

2011-11-23

177

A Kind of Twilight: How Do Teachers of English at Key Stage 3 Respond to the Requirement to Prepare Their Students for SATs?  

Science.gov (United States)

This article presents extracts from interviews with 14 teachers of English. It indicates some of the tensions which result for such teachers from having to prepare Year 9 students for the "national" tests in English toward the end of Key Stage 3. These are high-stakes tests: they supply the means to compile school "league tables" and the material…

Yarker, Patrick

2006-01-01

178

CAPA (Computer-Assisted Personalized Assignments) in a large university setting  

Science.gov (United States)

A systematic study of the online homework system CAPA (Computer-Assisted Personalized Assignments) was carried out in the calculus-based introductory physics course at the University of Colorado, Boulder during the fall 2001 semester (N ? 500). This study looked at the effects CAPA had on student learning and attitudes. The students in this class were split into two groups. One group was initially assigned to CAPA; the other group was assigned to traditional homework. At mid-semester the groups switched identities (the students who began the course using CAPA had to complete traditional homework). Exam scores and Force and Motion Concept Evaluation gains showed no statistically significant differences between the groups. Written quizzes and exams were collected from a smaller sample of students and analyzed using a problem-solving rubric. No statistically significant differences in the problem solving abilities of the groups were seen. Student opinions about the effect each homework type had on their learning were elicited. Students with non-expert-like epistemologies felt that CAPA was a better learning tool while students with expert-like epistemologies believed that traditional homework was a better learning tool. Problem solving interviews were conducted weekly with 9 students. From the analysis of this data a problem solving characterization of students using CAPA and traditional homework was inferred. Four types of problems solvers emerged---the CAPA Thinker, Traditional Thinker, CAPA Guesser, and Traditional Guesser. Thinkers tend to have expert-like epistemological beliefs. Guessers generally have non-expert-like epistemologies. On quantitative problems traditional homework promoted metacognitive processes in the Traditional Thinker and CAPA hindered self-evaluation among CAPA Thinkers. On qualitative problems, the opposite was observed to occur. When the students switched homework types at mid-semester it was expected that CAPA Thinkers would become Traditional Thinkers and vice versa. Similar results were expected among Guessers. However, there were students who "switched" from Traditional Thinkers to CAPA Guessers as well as students who "switched" from CAPA Guesser to Traditional Thinker. This may imply that CAPA hinders metacognitive behaviors. Implications for the development of online homework systems are discussed. Directions for future research are suggested.

Pascarella, Andrea M.

179

Interval Assignment for Volumes with Holes  

Energy Technology Data Exchange (ETDEWEB)

This paper presents a new technique for automatically detecting interval constraints for swept volumes with holes. The technique finds true volume constraints that are not necessarily imposed by the surfaces of the volume. A graphing algorithm finds independent, parallel paths of edges from source surfaces to target surfaces. The number of intervals on two paths between a given source and target surface must be equal; in general, the collection of paths determine a set of linear constraints. Linear programming techniques solve the interval assignment problem for the surface and volume constraints simultaneously.

BENZLEY, STEVEN; MITCHELL, SCOTT A.; SHEPHERD, JASON F.

1999-09-07

180

Development of a Microbiology Course for Diverse Majors: Longitudinal Survey of the Use of Various Active, Problem-Based Learning Assignments.  

Science.gov (United States)

Reports on the development of a series of assignments for use in a basic microbiology course involving sophomore-, junior-, and senior-level students from five different biology majors. Assignments include writing, a class debate, and case history studies. (Author/MM)

Cundell, Diana R.

2002-01-01

 
 
 
 
181

Genetic spectrum assignment model with constraints in cognitive radio networks  

Directory of Open Access Journals (Sweden)

Full Text Available The interference constraints of genetic spectrum assignment model in cognitive radio networks are analyzed in this paper. An improved genetic spectrum assignment model is proposed. The population of genetic algorithm is divided into two sets, the feasible spectrum assignment strategies and the randomly updated spectrum assignment strategies. The penalty function is added to the utility function to achieve the spectrum assignment strategy that satisfies the interference constraints and has better fitness. The proposed method is applicable in both the genetic spectrum assignment model and the quantum genetic spectrum assignment mode. It can ensure the randomness of partial chromosomes in the population to some extent, and reduce the computational complexity caused by the constraints-free procedure after the update of population. Simulation results show that the proposed method can achieve better performance than the conventional genetic spectrum assignment model and quantum genetic spectrum assignment model

Fang Ye; Rui Yang; Yibing Li

2011-01-01

182

Social class assignment and mortality in Sweden.  

UK PubMed Central (United Kingdom)

The earlier practice of assigning all members of a family to the same social class as that of the household head, typically the father, has in recent years been replaced by either basing individual class position on one's own occupation or of one of the family members, not necessarily the father. These various practices have been extensively scrutinised for more than 20 years. The validity of the approaches has chiefly been tested by checking how well they account for the variation in some criteria, mostly class identification, political attitudes and voting behaviour. Here it is shown, using census data from Sweden, that mortality-rate differences between social classes covering the period 1991-1997 are greater for both men and women when both spouses are assigned to the same social class on the basis of the dominance approach, where the labour market position of either spouse may determine the social class of the family. It is suggested that the common observation that class differences are smaller among women than among men may, at least to some extent, be the result of establishing a woman's class position on the basis of her own occupation rather than the labour market position of her spouse.

Erikson R

2006-05-01

183

Social class assignment and mortality in Sweden.  

Science.gov (United States)

The earlier practice of assigning all members of a family to the same social class as that of the household head, typically the father, has in recent years been replaced by either basing individual class position on one's own occupation or of one of the family members, not necessarily the father. These various practices have been extensively scrutinised for more than 20 years. The validity of the approaches has chiefly been tested by checking how well they account for the variation in some criteria, mostly class identification, political attitudes and voting behaviour. Here it is shown, using census data from Sweden, that mortality-rate differences between social classes covering the period 1991-1997 are greater for both men and women when both spouses are assigned to the same social class on the basis of the dominance approach, where the labour market position of either spouse may determine the social class of the family. It is suggested that the common observation that class differences are smaller among women than among men may, at least to some extent, be the result of establishing a woman's class position on the basis of her own occupation rather than the labour market position of her spouse. PMID:16249049

Erikson, Robert

2005-10-24

184

Inspection of Forrestal parking permit allocation and assignments  

Energy Technology Data Exchange (ETDEWEB)

The purpose of this inspection was to review the process cr allocating and assigning parking permits at the Forrestal building. Specifically, we sought to determine the roles and responsibilities of Department of Energy (DOE) officials involved in the administration of the Forrestal parking permit process during the period June 1, 1991 to February 1, 1992. We also sought to determine if the allocation and assignment of Forrestal building parking spaces was implemented in accordance with Federal and DOE requirements. For our review, we interviewed the Headquarters officials involved in the administration of the parking permit allocation and assignment process. We also reviewed parking permit files and associated documentation for the period June 1, 1991 through February 1, 1992. In addition, we conducted a limited sampling of parking permits that were revoked during July and August 1991 to assess if they were processed in compliance with applicable regulations. We found no evidence that the actions by the Special Assistant to the Secretary (White House Liaison) and the other members of the parking committee regarding the issuance and revocation of parking permits were for any reason other than a desire to ensure that only individuals having a legitimate basis for a parking permit were issued a permit. However, we found that decisions by the parking committee regarding revocation of permits and appeals of revocation decisions were not always documented, nor were there written guidelines or procedures to govern the activities of the committee. In our view, the lack of written guidelines and procedures resulted in the use of invalidated personal knowledge by the parking committee in making decisions involving the revocation of parking permits and led to inconsistencies in the notification of individuals about the associated appeal process.

1992-12-16

185

Effects of academic service learning in drug misuse and addiction on students' learning preferences and attitudes toward harm reduction.  

UK PubMed Central (United Kingdom)

OBJECTIVE. To examine academic service-learning pedagogy on student learning and perceptions of drug misuse and addiction. DESIGN. Third- and fourth-year pharmacology students were exposed to an academic service-learning pedagogy that integrated a community service experience with lectures, in-class discussions and debates, group projects, a final paper, and an examination. Reflective writing assignments throughout the course required students to assimilate and apply what they had learned in the classroom to what they learned in their community placement. ASSESSMENT. Changes in students' responses on pre- and post-course survey instruments reflected shifts toward higher-order thinking. Also, subjective student-learning modalities shifted toward learning by writing. Students' perspectives and attitudes allowed improved context of issues associated with drug misuse and harm reduction models. CONCLUSION. Academic service-learning pedagogy contributes to developing adaptable, well-rounded, engaged learners who become more compassionate and pragmatic in addressing scientific and social questions relating to drug addiction.

Kabli N; Liu B; Seifert T; Arnot MI

2013-04-01

186

Designing cancer-killing artificial viruses to improve student understanding of microbiology.  

UK PubMed Central (United Kingdom)

Our objective was to assess the effectiveness of a "learning by designing" group project used in a lower-division Microbiology course. Students used knowledge gained from the course to design an artificial virus that would kill cancer cells. The assignment required groups to integrate the individual course topics into a unified, complex understanding of the field of microbiology. Throughout the course, students and the instructor collaborated in creating a rubric to evaluate the groups' final presentations. This paper reports the results of an assessment of the project by comparing the instructor's and the students' scores for the presentations. Students' and the instructor's scores were correlated; the Pearson coefficient of 0.52 was statistically significant. The results indicate that students gained sufficient knowledge to accurately evaluate proposed designs. Additionally, the overall course grade distribution improved compared to the semester before the project was introduced. Finally, in order to engage students in thinking about their own learning process, they completed a reflection assignment that required them to discuss the changes in their understanding of microbiology over the course of the semester. Our assessment indicates that a design project can serve as an effective and useful learning technique in undergraduate Microbiology courses, though modifications are suggested.

Kuniyuki A; Sharp G

2011-01-01

187

CASA: An Efficient Automated Assignment of Protein Mainchain NMR Data Using an Ordered Tree Search Algorithm  

International Nuclear Information System (INIS)

Rapid analysis of protein structure, interaction, and dynamics requires fast and automated assignments of 3D protein backbone triple-resonance NMR spectra. We introduce a new depth-first ordered tree search method of automated assignment, CASA, which uses hand-edited peak-pick lists of a flexible number of triple resonance experiments. The computer program was tested on 13 artificially simulated peak lists for proteins up to 723 residues, as well as on the experimental data for four proteins. Under reasonable tolerances, it generated assignments that correspond to the ones reported in the literature within a few minutes of CPU time. The program was also tested on the proteins analyzed by other methods, with both simulated and experimental peaklists, and it could generate good assignments in all relevant cases. The robustness was further tested under various situations.

2005-01-01

188

Political Psychology - Public Political Attitudes Assignment  

Science.gov (United States)

Students were asked to compare their estimates of public opinion on several current issues to the actual values obtained through the analysis of National Surveys. The objective was to explore a common social attribution error and to acquire familiarity with data sources and on-line analysis tools.

Marfleet, Greg

189

The Lost Sense: A Favorite Writing Assignment.  

Science.gov (United States)

Explains the guidelines for an exercise based on the poem "The Little Mute Boy" by F. Garcia Lorca. States that students are to: discuss synesthesia, the substitution of senses; explore the surreal senses; think about life without a sense; create a net of surprises; write a poem; and read the poem aloud. (PA)

Galt, Margot Fortunato

1995-01-01

190

Classifier Assignment by Corpus-based Approach  

CERN Multimedia

This paper presents an algorithm for selecting an appropriate classifier word for a noun. In Thai language, it frequently happens that there is fluctuation in the choice of classifier for a given concrete noun, both from the point of view of the whole spe ech community and individual speakers. Basically, there is no exect rule for classifier selection. As far as we can do in the rule-based approach is to give a default rule to pick up a corresponding classifier of each noun. Registration of classifier for each noun is limited to the type of unit classifier because other types are open due to the meaning of representation. We propose a corpus-based method (Biber, 1993; Nagao, 1993; Smadja, 1993) which generates Noun Classifier Associations (NCA) to overcome the problems in classifier assignment and semantic construction of noun phrase. The NCA is created statistically from a large corpus and recomposed under concept hierarchy constraints and frequency of occurrences.

Sornlertlamvanich, V; Meknavin, S; Sornlertlamvanich, Virach; Pantachat, Wantanee; Meknavin, Surapant

1994-01-01

191

Tech Trek: Electronic bulletin boards and digital student groups  

Science.gov (United States)

Nothing is as irksome as a student who returns from a couple of days of being absent and asks nonchalantly, "Did I miss anything?" Not only do you have to backtrack through what you did in the last few days of instruction, but you must also remember on the spot what assignments you gave, what worksheet you required, and what supporting handouts you may have distributed. Fortunately, you can avoid this question altogether with the help of two technological tools: electronic bulletin boards and digital student groups. These tools have been used for many years by schools offering online courses and distance-learning opportunities. This article describes these tools, and explains how they can be utilized to benefit students in traditional courses.

Christmann, Edwin P.; Wighting, Mervyn J.; Lucking, Robert A.

2007-09-01

192

(1)H, (15)N, and (13)C backbone resonance assignments for the yersinia protein tyrosine phosphatase YopH.  

UK PubMed Central (United Kingdom)

YopH is a protein tyrosine phosphatase that functions as a required virulence factor in Yersinia. Here we report the backbone resonance assignments for a point mutant of the C-terminal catalytic domain of YopH.

Whittier SK; Loria JP

2013-09-01

193

Electre tri method used to storage location assignment into categories  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english Day after day, the importance of a company having an efficient storage location assignment system increases. Moreover, since products have different warehouse costs and customers' requirements are also different, it is important to sort products in order to adopt strategies for inventory management that are appropriate for each product. However, adopting a policy for each product is not applicable in the real world. Therefore, companies usually categorize products into cl (more) asses and thereafter adopt specific inventory management policies. Given this situation, this paper puts forward the arguments for adopting a multi-criteria method, Electre TRI, to sort products that both considers criteria relating to the characteristics of a product as to its physical location in the warehouse and the criteria that are important for inventory strategies, such as, for example, the profitability of each unit held in storage.

Fontana, Marcele Elisa; Cavalcante, Cristiano Alexandre Virgínio

2013-08-01

194

ICT Proficiency of Dental Students in Sri Lanka  

Directory of Open Access Journals (Sweden)

Full Text Available The Faculty of Dental Sciences, University of Peradeniya has been conducting formal introductory courses in ICT for undergraduates at their entry level. Although senior students do not get an opportunity for ICT education they will be required to perform tasks such as assignments, reports, referencing using ICT tools.Dental undergraduate students’ proficiency in ICT was tested on randomly selected groups from three senior batches. Total performance of all students tested showed that the MCQ score (53.4, SD 8.0) has exceeded the pass mark and practical test (44.0, SD 7.2) has recorded well below. Individual tests on the Practical components also showed that students were extremely weak in Excel (8.1, SD 2.2) and well below passmark in Word (16.9, SD 2.9) and Powerpoint (19.0, SD 5.3) tasks.This indicates that considering the basic nature of the questions in this ICT proficiency test, students have displayed a low level of skill in the practical component. However the total aggregate for the overall student performance (48.8, SD 5.4) has recorded just below the pass mark of 50%. These results reiterate the need for development of a formal supplementary training course in ICT for students in senior batches in the Faculty of Dental Sciences.

Jayantha Udaya Weerasinghe; Parakrama Wijekoon

2012-01-01

195

Parallel shortest augmenting path algorithm for the assignment problem. Technical report  

Energy Technology Data Exchange (ETDEWEB)

We describe a parallel version of the shortest augmenting path algorithm for the assignment problem. While generating the initial dual solution and partial assignment in parallel does not require substantive changes in the sequential algorithm, using several augmenting paths in parallel does require a new dual variable recalculation method. The parallel algorithm was tested on a 14-processor Butterfly Plus computer, on problems with up to 900 million variables. The speedup obtained increases with problem size. The algorithm was also embedded into a parallel branch and bound procedure for the traveling salesman problem on a directed graph, which was tested on the Butterfly Plus on problems involving up to 7,500 cities. To our knowledge, these are the largest assignment problems and traveling salesman problems solved so far.

Balas, E.; Miller, D.; Pekny, J.; Toth, P.

1989-04-01

196

Lava Layering: Student Page  

Science.gov (United States)

This is the Student Page of an activity that teaches students about the stratigraphy of lava flows produced by multiple eruptions. This page has activity procedures, key words, a list of required materials, and twelve questions for the students to answer. This activity is part of Exploring Planets in the Classroom's Volcanology section.

197

English Language as a Requirement Course for Information Students -- A Content Analysis of English Syllabus in the Faculty of Arabic and Islamic Studies/ Nile Valley University  

Directory of Open Access Journals (Sweden)

Full Text Available The study investigated the importance of two elements in the process of syllabus design (ends / means specifications, program implementation) in the faculty of Islamic and Arabic studies, Nile Valley University, designed in 1995.Results indicate that the ends/means specifications stage is used to present the general aims and the objective of each course. A general description of each course is also given. Program implementation is completely left for the teacher’s decision. The paper shows related literature review for information students. This kind of literature review (linguistic contents) may however change the Program Implementation to a highly individualistic and subjective stage. Materials writing are left only for teachers and this may cause variations in the linguistic contents of the prescribed courses and this in turn may lead to many hidden syllabuses. Teachers training as a unique step in program implementation stage is lacking since there is no ESP teacher program available

Mustafa Shazali Mustafa Ahmed

2009-01-01

198

Regulatory focus and the assignment of punishment  

Directory of Open Access Journals (Sweden)

Full Text Available Regulatory Focus has been demonstrated to influence human behavior in a number of domains, such as object valuation and readiness to commit time or money to social projects. It has also been demonstrated to influence an individual’s approach to mistakes; and a person’s preference for global or local processing of information. The present work seeks to consider how regulatory focus might interact with punitive behaviors, specifically, the assignment of legal punishment. In this study, 240 undergraduates completed a series of written instruments that assessed their regulatory focus. They read a vignette that described a target that commits a crime, is detected by the police, and is arrested due to a careless mistake. Participants were asked what level of legal punishment they deemed appropriate. Participants’ punitive evaluations show that there are significant interactions a) between the regulatory focus of the participant and the regulatory focus of the target and b) between the regulatory focus of the participant and the level of detail used to describe the target and her behavior. In each case, when the regulatory foci matched, causing ‘fit,’ the participant was more lenient than in the non-fit condition.

Chloe Carmichael; Nancy Nawi; Joseph Cesario; Abagail Scholer; E. Tory Higgins

2007-01-01

199

Joint Power Control, Base Station Assignment, and Channel Assignment in Cognitive Femtocell Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Cognitive radio and femtocells are recent technology breakthroughs that aim to achieve throughput improvement by means of spectrum management and interference mitigation, respectively. However, these technologies are limited by the former's susceptibility to interference and the latter's dependence on bandwidth availability. In this paper, we overcome these limitations by integrating cognitive radio and femtocell technology and exploring its feasibility and throughput improvement. To realize this, we propose an integrated architecture and formulate a multiobjective optimization problem with mixed integer variables for the joint power control, base station assignment, and channel assignment scheme. In order to find a pareto optimal solution, a weighted sum approach was used. Based on numerical results, the optimization framework is found to be both stable and converging. Simulation studies further show that the proposed architecture and optimization framework improve the aggregate throughput as the client population rises, hence confirming the successful and beneficial integration of these technologies.

Torregoza JohnPaulM; Enkhbat Rentsen; Hwang Won-Joo

2010-01-01

200

Financial Literacy for High School Students: A Guidance Document to Assist Nevada's School Districts in Meeting the Requirements under SB 317  

Science.gov (United States)

The 2009 Nevada Legislature approved Senate Bill 317 (SB 317) requiring that Nevada's public high schools, including charter schools, provide instruction in financial literacy. In an effort to assist school districts with implementation of instruction in financial literacy, the Nevada Department of Education assembled a task force (Financial…

Nevada Department of Education, 2010

2010-01-01

 
 
 
 
201

Gender-Inclusive Housing Preferences: A Survey of College-Aged Transgender Students  

Science.gov (United States)

Traditional on-campus housing assignments at colleges and universities are made on the basis of legal sex, where students are housed only with other students of the same legal sex. This method is problematic for transgender and gender-nonconforming students, who may not identify with the gender assigned to them at birth. Recently, some…

Krum, Tiana E.; Davis, Kyle S.; Galupo, M. Paz

2013-01-01

202

A Method of Using Student Evaluation in the Basic [Speech] Course.  

Science.gov (United States)

Student input into grading in the basic speech communication course can be accomplished through a peer evaluation system. Three student evaluators are assigned for every student speech. Speeches are given a quality score by the peer evaluators and by the instructor. Rating errors are minimized by assigning peer evaluators so that no…

Zeman, James V.

203

The 15-Minute Family Interview as a learning strategy for senior undergraduate nursing students.  

UK PubMed Central (United Kingdom)

Nursing care of families continues to be a challenge within complex and demanding health-care systems. Educational strategies to bridge the theory-practice gap, connecting classroom learning with clinical experiences in undergraduate nursing education, enable students to develop the skills required to form meaningful partnerships with families. This article describes how undergraduate nursing students complete a 15-Minute Family Interview in a clinical practice setting, and document the interview process in a reflective major paper. Students integrate research and theory and identify ways to improve the care of families in the clinical setting while building communication skills and confidence in interacting with families in everyday practice. The implementation of the assignment and the evaluation of the process, including quotes from 10 student papers and 2 clinical faculty members, are discussed. Implications for education and ongoing research are offered.

Holtslander L; Solar J; Smith NR

2013-05-01

204

Flexible Issue Slot Assignment for VLIW Architectures  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Programming specialized processors requires solving complex resource constrain- ts related to the underlying architecture. Although one instruction of the Philips TriMedia VLIW processor can issue five parallel operations, each category of operations can only be allocated to a subset of the five ava...

Chamski, Zbigniew; Eisenbeis, Christine; Rohou, Erven

205

Development of advanced WTA (Weapon Target Assignment) algorithms for parallel processing. Final report  

Energy Technology Data Exchange (ETDEWEB)

The objective of weapon-target assignment (WTA) in a ballistic missile defense (BMD) system is to determine how defensive weapons should be assigned to boosters and reentry vehicles in order to maximize the survival of assets belonging to the U.S. and allied countries. The implied optimization problem requires consideration of a large number of potential weapon target assignments in order to select the most effective combination of assignments. The resulting WTA optimization problems are among the most complex encountered in mathematical programming. Indeed, simple versions of the WTA problem have been shown to be NP-complete, implying that the computations required achieve optimal solutions grow exponentially with the numbers of weapons and targets considered in the solution. The computational complexity of the WTA problem has motivated the development of heuristic algorithms that are not altogether satisfactory for use in Strategic Defense Systems (SDS). Some special cases of the WTA problem are not NP-complete and can be solved using standard optimization algorithms such as linear programming and maximum-marginal-return algorithms; these algorithms enjoy low computational requirements and therefore have been adopted as heuristics for solving more general WTA problems. However, experimental studies have demonstrated that these heuristic algorithms lead to significantly suboptimal solutions for certain scenarios.

Castanon, D.A.

1989-10-01

206

Developing information literacy with first year oral health students.  

UK PubMed Central (United Kingdom)

CONTEXT: In this time of rapid expansion of the scientific knowledge base, subject matter runs the risk of becoming outdated within a relatively short time. Instead of adding more content to already crowded curricula, the focus should be on equipping students to adapt to their changing world. The ability to access, evaluate and apply new knowledge for the benefit of patients has been acknowledged as an important goal for dental education. Information literacy is key to achieving this. METHODS: An information literacy programme for first year oral health students was instituted. This was integrated within a biosciences course and linked with its assessment. Small group instruction reinforced by the use of a tailored online Assignment Guide was used in the context of a specific task. Effectiveness was measured in terms of assessment outcome, processes used and student experience. RESULTS: Twenty-seven students participated in the intervention which was effective in enhancing foundation literacy skills and confidence of students in accessing and evaluating information sources in the context of a clinical problem. Improvement in higher level literacy skills required to articulate this information in the synthesis of a scientific review was not demonstrated. CONCLUSIONS: Integration of this information literacy programme within the learning activities and assessment of a basic sciences course resulted in significantly enhanced information literacy skills. As this is highly relevant for higher education students in general, the wider promotion of information literacy should be encouraged.

Ford PJ; Foxlee N; Green W

2009-02-01

207

Introductory Videos: An Analysis of Student Use Patterns  

Directory of Open Access Journals (Sweden)

Full Text Available In a distance-learning environment, an introductory video allows students to see and hear their instructor, affording the instructor the ability to efficiently communicate course information to a large number of students. This study considers the use of these introductory videos and made use of the Blackboard course management system (Blackboard, 2008) during two consecutive academic semesters to track and evaluate student usage patterns. Results found students used the video throughout the semester, although an ARIMA (autoregressive integrated moving average) analysis found a significant negative trend. An additional exploratory analysis conducted with a linear regression and t-test found that student use of the video during the first half of the spring semester was significantly greater than during the second half of the semester. This finding may suggest that this type of video, a general course introduction, is much more useful to students early in a semester than it is in the latter half of a course. Additionally, this type of video may be viewed in the second half of a course to access more specific content information to assist with assignments but does not require frequent viewing.

David Lewis; Max Moreno; John Large

2009-01-01

208

Developing a Model of Teaching English to Primary School Students  

Directory of Open Access Journals (Sweden)

Full Text Available Under the auspices of the Centre for Curriculum Decelopment, a three-cycle action research study was carried out in three primary schools in Yogyakarta with the aim of developing a model of teaching English to primary school students. The model consists of five parts: Opening, Content Focus, Language Focus, Communication Focus, and Closing. The model, requiring that learning tasks involve active participation of students, both physically and mentally, supported by the use of media suitable for young learners, was developmentally fully implemented. The results showed that efforts were mostly made to establish teacher-student rapport in the first cycle, in which success in classroom management was gradually reached. This led to the easier second cycle, which was characterized by increasing teacher talk (classroom English), the use of interesting media, and more active students' participation in the tasks involving various games which successfully elicited students' English. All of this was solidified in the third cycle. The conclusion is that with the three aspects being focused successively, teacher-student good rapport being established, various media being used, and competing and cooperative tasks being assigned in balance, joyful and effective learning is likely to occur.

Suwarsih Madya; Bambang Sugeng; Samsul Maarif; Nury Supriyanti; Widyastuti Purbani; Basikin Basikin; Sri Istiqomah

2004-01-01

209

AN EXPLORATORY STUDY OF LECTURERS' VIEWS OF OUT-OF-CLASS ACADEMIC COLLABORATION AMONG STUDENTS  

Directory of Open Access Journals (Sweden)

Full Text Available This article reports an exploratory study of lecturers' perceptions of out-of-class academic collaboration (OCAC) among students at a large Singapore university. Two types of OCAC were investigated: collaboration initiated by students, e.g., groups decide on their own to meet to prepare for exams, and collaboration required by teachers, e.g., teachers assign students to do projects in groups. Data were collected via one-on-one interviews with 18 faculty members from four faculties at the university. Findings suggest that OCAC, especially of a teacher-required kind, is fairly common at the university. Faculty members' views on factors affecting the success of OCAC are discussed for the light they might shed on practices to enhance the effectiveness of OCAC.

Teng Sze Mei Jessie; Susan Lopez-Nerney; Norhayati Bte Mohd Ismail; Toh L. S., Jacqueline E; Lisa Meyer; Wu Siew Mei; George M. Jacobs; David Crookall

2001-01-01

210

On Optimal Linear Redistribution of VCG Payments in Assignment of Heterogeneous Objects  

CERN Multimedia

There are p heterogeneous objects to be assigned to n competing agents (n > p) each with unit demand. It is required to design a Groves mechanism for this assignment problem satisfying weak budget balance, individual rationality, and minimizing the budget imbalance. This calls for designing an appropriate rebate function. Our main result is an impossibility theorem which rules out linear rebate functions with non-zero efficiency in heterogeneous object assignment. Motivated by this theorem, we explore two approaches to get around this impossibility. In the first approach, we show that linear rebate functions with non-zero are possible when the valuations for the objects are correlated. In the second approach, we show that rebate functions with non-zero efficiency are possible if linearity is relaxed.

Gujar, Sujit

2008-01-01

211

Cooperative multiple target assignment of submunitions based on Chaos-PSO algorithm  

Science.gov (United States)

In this paper Multi-Objective particle swarm optimization (MOPSO) algorithm is utilized to solve the problem for cooperative multiple target assignment, which is the optimization problem in the discrete search space. At first a model of multi-objective optimization for Cooperative Multiple Target Assignment is established. Aiming to solve out the local convergence phenomenon, the chaos mutation is introduced into PSO for improving global optimal ability. Another underlying problem is that computing speed of the algorithm must meet the operational requirement, so a new kind of Chaos-MOPSO Algorithm is developed to solve the target assignment problem with less population and iterations. At last an authentication example is given in this paper, compared with basic MOPSO and NSGA-II, the Chaos-MOPSO algorithm obtained a better Pareto solution set with smaller computational burden.

Wu, Xuzhong; Tang, Shengjing; Shi, Jiao

2011-10-01

212

Spin assignment of 109Ag neutron resonances  

International Nuclear Information System (INIS)

Using the low-level population method and also information from primary ?-rays, the spin of fifty-five s-wave and twenty-three p-wave neutron resonances of 109Ag have been determined in the energy range 10-1400 eV. These data are required for the interpretation of parity violation measurements performed by the TRIPLE collaboration on the same isotope. (author)

1997-01-01

213

Using a simulated environment to support students learning clinical skills.  

Science.gov (United States)

Within intellectual disability nursing students are prepared within a biopsychosocialeducational model and curriculum address these challenges. Using a simulated learning environment has great potential for promoting competence and in-depth knowledge of substantive topics relevant to practice. This article presents an assignment designed to more closely resemble real-world activities to allow students develop and exercise skills that translate to practice activities and incorporates a student's reflective comments on the process. The assignment was designed to foster intellectual disability student nurses ability to facilitate family/client education. The aim of the assignment was fulfilled through the students designing a clinical skill teaching session that could be used with families/clients. The sessions were recorded and the student reviewed their recording to reflect on their performance and to self assess. To facilitate student learning the modules academic lecturer also reviewed the recording and both lecturer and student meet to discuss the reflection and self assessment. PMID:23602694

Doody, O; Condon, M

2013-04-18

214

Using a simulated environment to support students learning clinical skills.  

UK PubMed Central (United Kingdom)

Within intellectual disability nursing students are prepared within a biopsychosocialeducational model and curriculum address these challenges. Using a simulated learning environment has great potential for promoting competence and in-depth knowledge of substantive topics relevant to practice. This article presents an assignment designed to more closely resemble real-world activities to allow students develop and exercise skills that translate to practice activities and incorporates a student's reflective comments on the process. The assignment was designed to foster intellectual disability student nurses ability to facilitate family/client education. The aim of the assignment was fulfilled through the students designing a clinical skill teaching session that could be used with families/clients. The sessions were recorded and the student reviewed their recording to reflect on their performance and to self assess. To facilitate student learning the modules academic lecturer also reviewed the recording and both lecturer and student meet to discuss the reflection and self assessment.

Doody O; Condon M

2013-04-01

215

Linear Assignment Maps for Correlated System-Environment States  

CERN Multimedia

An assignment map is a mathematical operator that describes initial system-environment states for an open quantum systems. We reexamine the notion of assignments, introduced by Pechukas, and show the conditions for which linear assignments can account for correlations between the system and the environment. We study the role of other conditions, such as consistency and positivity of the map, and show the effects of relaxing these. Finally, we establish a connection between the violation of positivity of linear assignments and the no-broadcasting theorem.

Rodríguez-Rosario, César A; Aspuru-Guzik, Alán

2009-01-01

216

Efficient Role Assignment Scheme for Multichannel Wireless Mesh Networks  

Directory of Open Access Journals (Sweden)

Full Text Available a wireless mesh network (WMN) is cost-effective access network architecture. The performance of multi-hop communication quickly reduces as the number of hops becomes larger. Nassiri et al. proposed a Molecular MAC protocol for autonomic assignment and use of multiple channels to improve network performance. In the Molecular MAC protocol, each node forms a shortest path-spanning tree to a gateway node linked to a wired Internet. After a tree is formed, the nodes with an even-numbered depth and an odd-numbered depth are assigned with the roles of a nucleus and an electron, respectively. After such roles are assigned, each nucleus selects an idle channel. However, this protocol has the following drawback; since the nodes with an even-numbered depth are assigned with the role of a nucleus, there are many nuclei in the topology. The number of assigned channels tends to increase, since each nucleus selects an idle channel that is not currently being occupied by its neighboring nuclei. In wireless communications networks, channels are very important resources. Thus, it is necessary to assign the minimum number of channels as little as possible. To do so, this paper proposes an efficient role assignment scheme, which can reduce the number of assigned channels by reducing the number of nodes assigned as nuclei and preventing nodes within the transmission range of each other from becoming nuclei. Based on various simulation results, the proposed scheme was verified.

Sunmyeng Kim; Hyun Ah Lee

2013-01-01

217

Understanding Student Computational Thinking with Computational Modeling  

CERN Multimedia

Recently, the National Research Council's framework for next generation science standards highlighted "computational thinking" as one of its "fundamental practices". Students taking a physics course that employed the Arizona State University's Modeling Instruction curriculum were taught to construct computational models of physical systems. Student computational thinking was assessed using a proctored programming assignment, written essay, and a series of think-aloud interviews, where the students produced and discussed a computational model of a baseball in motion via a high-level programming environment (VPython). Roughly a third of the students in the study were successful in completing the programming assignment. Student success on this assessment was tied to how students synthesized their knowledge of physics and computation. On the essay and interview assessments, students displayed unique views of the relationship between force and motion; those who spoke of this relationship in causal (rather than obs...

Aiken, John M; Douglas, Scott S; Burk, John B; Scanlon, Erin M; Thoms, Brian D; Schatz, Michael F

2012-01-01

218

An Adaptive Strategy for an Optimized Collision-Free Slot Assignment in Multichannel Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Convergecast is the transmission paradigm used by data gathering applications in wireless sensor networks (WSNs). For efficiency reasons, a collision-free slotted medium access is typically used: time slots are assigned to non-conflicting transmitters. Furthermore, in any slot, only the transmitters and the corresponding receivers are awake, the other nodes sleeping in order to save energy. Since a multichannel network increases the throughput available to the application and reduces interference, multichannel slot assignment is an emerging research domain in WSNs. First, we focus on a multichannel time slot assignment that minimizes the data gathering delays. We compute the optimal time needed for a raw data convergecast in various multichannel topologies. Then, we focus on how to adapt such an assignment to dynamic demands of transmissions (e.g., alarms, temporary additional application needs and retransmissions). We formalize the problem using linear programming, and we propose an incremental technique that operates on an optimized primary schedule to provide bonus slots to meet new transmission needs. We propose AMSA, an Adaptive Multichannel Slot Assignment algorithm, which takes advantage of bandwidth spatial reuse, and we evaluate its performances in terms of the number of slots required, slot reuse, throughput and the number of radio state switches.

Ridha Soua; Erwan Livolant; Pascale Minet

2013-01-01

219

Educating future physicians to track health care quality: feasibility and perceived impact of a health care quality report card for medical students.  

UK PubMed Central (United Kingdom)

PURPOSE: Quality improvement (QI) requires measurement, but medical schools rarely provide opportunities for students to measure their patient outcomes. The authors tested the feasibility and perceived impact of a quality metric report card as part of an Education-Centered Medical Home longitudinal curriculum. METHOD: Student teams were embedded into faculty practices and assigned a panel of patients to follow longitudinally. Students performed retrospective chart reviews and reported deidentified data on 30 nationally endorsed QI metrics for their assigned patients. Scorecards were created for each clinic team. Students completed pre/post surveys on self-perceived QI skills. RESULTS: A total of 405 of their patients' charts were abstracted by 149 students (76% response rate; mean 2.7 charts/student). Median abstraction time was 21.8 (range: 13.1-37.1) minutes. Abstracted data confirmed that the students had successfully recruited a "high-risk" patient panel. Initial performance on abstracted quality measures ranged from 100% adherence on the use of beta-blockers in postmyocardial infarction patients to 24% on documentation of dilated diabetic eye exams. After the chart abstraction assignment, grand rounds, and background readings, student self-assessment of their perceived QI skills significantly increased for all metrics, though it remained low. CONCLUSIONS: Creation of an actionable health care quality report card as part of an ambulatory longitudinal experience is feasible, and it improves student perception of QI skills. Future research will aim to use statistical process control methods to track health care quality prospectively as our students use their scorecards to drive clinic-level improvement efforts.

O'Neill SM; Henschen BL; Unger ED; Jansson PS; Unti K; Bortoletto P; Gleason KM; Woods DM; Evans DB

2013-10-01

220

Educating Future Physicians to Track Health Care Quality: Feasibility and Perceived Impact of a Health Care Quality Report Card for Medical Students.  

UK PubMed Central (United Kingdom)

PURPOSE: Quality improvement (QI) requires measurement, but medical schools rarely provide opportunities for students to measure their patient outcomes. The authors tested the feasibility and perceived impact of a quality metric report card as part of an Education-Centered Medical Home longitudinal curriculum. METHOD: Student teams were embedded into faculty practices and assigned a panel of patients to follow longitudinally. Students performed retrospective chart reviews and reported deidentified data on 30 nationally endorsed QI metrics for their assigned patients. Scorecards were created for each clinic team. Students completed pre/post surveys on self-perceived QI skills. RESULTS: A total of 405 of their patients' charts were abstracted by 149 students (76% response rate; mean 2.7 charts/student). Median abstraction time was 21.8 (range: 13.1-37.1) minutes. Abstracted data confirmed that the students had successfully recruited a "high-risk" patient panel. Initial performance on abstracted quality measures ranged from 100% adherence on the use of beta-blockers in postmyocardial infarction patients to 24% on documentation of dilated diabetic eye exams. After the chart abstraction assignment, grand rounds, and background readings, student self-assessment of their perceived QI skills significantly increased for all metrics, though it remained low. CONCLUSIONS: Creation of an actionable health care quality report card as part of an ambulatory longitudinal experience is feasible, and it improves student perception of QI skills. Future research will aim to use statistical process control methods to track health care quality prospectively as our students use their scorecards to drive clinic-level improvement efforts.

O'Neill SM; Henschen BL; Unger ED; Jansson PS; Unti K; Bortoletto P; Gleason KM; Woods DM; Evans DB

2013-08-01

 
 
 
 
221

CAMRA: Chemical shift based computer aided protein NMR assignments  

International Nuclear Information System (INIS)

A suite of programs called CAMRA (Computer Aided Magnetic Resonance Assignment) has been developed for computer assisted residue-specific assignments of proteins. CAMRA consists of three units: ORB, CAPTURE and PROCESS. ORB predicts NMR chemical shifts for unassigned proteins using a chemical shift database of previously assigned homologous proteins supplemented by a statistically derived chemical shift database in which the shifts are categorized according to their residue, atom and secondary structure type. CAPTURE generates a list of valid peaks from NMR spectra by filtering out noise peaks and other artifacts and then separating the derived peak list into distinct spin systems. PROCESS combines the chemical shift predictions from ORB with the spin systems identified by CAPTURE to obtain residue specific assignments. PROCESS ranks the top choices for an assignment along with scores and confidence values. In contrast to other auto-assignment programs, CAMRA does not use any connectivity information but instead is based solely on matching predicted shifts with observed spin systems. As such, CAMRA represents a new and unique approach for the assignment of protein NMR spectra. CAMRA will be particularly useful in conjunction with other assignment methods and under special circumstances, such as the assignment of flexible regions in proteins where sufficient NOE information is generally not available. CAMRA was tested on two medium-sized proteins belonging to the chemokine family. It was found to be effective in predicting the assignment providing a database of previously assigned proteins with at least 30% sequence identity is available. CAMRA is versatile and can be used to include and evaluate heteronuclear and three-dimensional experiments.

1998-01-01

222

The importance of active learning and practice on the students' mastery of pharmacokinetic calculations for the intermittent intravenous infusion dosing of antibiotics.  

UK PubMed Central (United Kingdom)

BACKGROUND: Estimation of pharmacokinetic parameters after intermittent intravenous infusion (III) of antibiotics, such as aminoglycosides or vancomycin, has traditionally been a difficult subject for students in clinical pharmacology or pharmacokinetic courses. Additionally, samples taken at different intervals during repeated dose therapy require manipulation of sampling times before accurate calculation of the patient-specific pharmacokinetic parameters. The main goal of this study was to evaluate the effectiveness of active learning tools and practice opportunities on the ability of students to estimate pharmacokinetic parameters from the plasma samples obtained at different intervals following intermittent intravenous infusion. METHODS: An extensive reading note, with examples, and a problem case, based on a patient's chart data, were created and made available to students before the class session. Students were required to work through the case before attending the class. The class session was devoted to the discussion of the case requiring active participation of the students using a random participation program. After the class, students were given additional opportunities to practice the calculations, using online modules developed by the instructor, before submitting an online assignment. RESULTS: The performance of students significantly (P?students further improved (P?assignment after they had a chance to study on their own and work on the online practices. Finally, students scored 82.6% in a formal mid-term examination, suggesting significant retention of the materials. CONCLUSIONS: Despite being a difficult subject, students achieve mastery of pharmacokinetic calculations for the topic of intermittent intravenous infusion when appropriate active learning strategies and practice opportunities are employed.

Mehvar R

2012-01-01

223

ICT Teachers' Assigned Roles and Expectations from Them  

Science.gov (United States)

|The aim of this study was to provide a better understanding of ICT teachers' assigned position and to determine school administrators' and other teachers' perceptions towards ICT teachers and these teachers' positions, and to reveal the similar and discrepant aspects of their tertiary education and the roles (work and responsibilities) assigned

Topu, Fatma Burcu; Goktas, Yuksel

2012-01-01

224

Grid Computing GT4 Core and Service Deployment Assignment  

Science.gov (United States)

Grid Computing GT4 core and service deployment Assignment - The goal of this assignment is to create a Globus 4.0 (GT4) stateful Web service and deploy it in GT4 container, and test it with a simple client.

Ferner, Clayton; Wilkinson, Barry

2011-06-30

225

Dynamic Equilibrium Assignment Convergence by En-route Flow Smoothing:  

Digital Repository Infrastructure Vision for European Research (DRIVER)

An essential feature in many dynamic traffic assignment (DTA) models used for planning purposes is to compute the (dynamic) equilibrium assignment, where travellers follow user-optimal routes, leading to minimal experienced route travel times. To compute these time-varying route flows in the equilib...

Pel, A.J.; Bliemer, M.C.J.; Hoogendoorn, S.P.

226

ICT Teachers' Assigned Roles and Expectations from Them  

Science.gov (United States)

The aim of this study was to provide a better understanding of ICT teachers' assigned position and to determine school administrators' and other teachers' perceptions towards ICT teachers and these teachers' positions, and to reveal the similar and discrepant aspects of their tertiary education and the roles (work and responsibilities) assigned to…

Topu, Fatma Burcu; Goktas, Yuksel

2012-01-01

227

NOESY on neurotoxins: NMR and conformational assignments of picrotoxins.  

Science.gov (United States)

Nuclear Overhauser effect spectroscopy (NOESY) gave full assignments of the 1H-NMR spectra of the picrotoxane neurotoxins tutin, hyenanchin, picrotoxinin and picrotin, as well as the solution conformations of these compounds, consistent with molecular modelling. Fully assigned 13C-NMR data are reported. PMID:11704965

Perry, N B; Aiyaz, M; Kerr, D S; Lake, R J; Leach, M T

228

NOESY on neurotoxins: NMR and conformational assignments of picrotoxins.  

UK PubMed Central (United Kingdom)

Nuclear Overhauser effect spectroscopy (NOESY) gave full assignments of the 1H-NMR spectra of the picrotoxane neurotoxins tutin, hyenanchin, picrotoxinin and picrotin, as well as the solution conformations of these compounds, consistent with molecular modelling. Fully assigned 13C-NMR data are reported.

Perry NB; Aiyaz M; Kerr DS; Lake RJ; Leach MT

2001-01-01

229

Time Slot Assignment Algorithm for a TDMA Packet Radio Network.  

Science.gov (United States)

An algorithm for the assignment of time slots within a Time Division Multiple Access (TDMA) scheme for an integrated voice and packet radio network is implemented in, and studied by, a computer simulation. The slot assignment scheme is applied both to a s...

W. K. Tritchler

1983-01-01

230

SS/TDMA time slot assignment with restricted switching modes  

Science.gov (United States)

The time slot assignment problem for satellite-switched time-division multiple access communication systems is studied. In particular, assignment algorithms are developed for the special case in which only a restricted subset of all possible switching modes is to be utilized. The question of the existence and selection of such restricted sets of switching modes is also addressed.

Lewandowski, J. L.; Liu, J. W. S.; Liu, C. L.

231

Task Assignment Problem Solved by Continuous Hopfield Network  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The task assignment problem with non uniform communication costs (TAP) consists in finding an assignment of the tasks to the processors such that the total execution and communication costs is minimized. This problem is naturally formulated as 0-1 quadratic programming subject to linear constraints...

Ettaouil Mohamed; Loqman Chakir; Hami Youssef; Haddouch Khalid

232

Optimal Assignment of Durable Objects to Successive Agents  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper analyzes the assignment of durable objects to successive generations of agents who live for two periods. The optimal assignment rule is stationary, favors old agents and is determined by a selectivity function which satisfies an iterative functional differential equation. More patient soc...

Bloch, Francis; Houy, Nicolas

233

Further Steps in TANGO: improved taxonomic assignment in metagenomics.  

Science.gov (United States)

MOTIVATION: TANGO is one of the most accurate tools for the taxonomic assignment of sequence reads. However, because of the differences in the taxonomy structures, performing a taxonomic assignment on different reference taxonomies will produce divergent results. RESULTS: We have improved the TANGO pipeline to be able to perform the taxonomic assignment of a metagenomic sample using alternative reference taxonomies, coming from different sources. We highlight the novel pre-processing step, necessary to accomplish this task, and describe the improvements in the assignment process. We present the new TANGO pipeline in details, and, finally, we show its performance on four real metagenomic datasets and also on synthetic datasets. AVAILABILITY: The new version of TANGO, including implementation improvements and novel developments to perform the assignment on different reference taxonomies, is freely available at http://sourceforge.net/projects/taxoassignment/. CONTACT: valiente@lsi.upc.edu. PMID:23645816

Alonso-Alemany, Daniel; Barré, Aurélien; Beretta, Stefano; Bonizzoni, Paola; Nikolski, Macha; Valiente, Gabriel

2013-05-29

234

Evaluating Experiential Learning in Organizational Behavior: Taking Measure of Student Perception Regarding Group Experience  

Directory of Open Access Journals (Sweden)

Full Text Available Problem statement: The purpose of this study was to determine undergraduate student perceptions in the areas of group experience within the context of an undergraduate organizational behavior business class community service assignment. College students, as part of an in-class service-learning project, were assigned to teach business related curriculum to at-risk high school students. Approach: Students, enrolled in the required senior level business course, were then assessed in the following areas: service learning experience and group experience. A multiple-choice questionnaire was administered to undergraduate students in an organizational and administrative behavior class and analyzed for correlations and relationships. The survey was administered in week eleven of a traditional semester and in the last week of the community service project. The survey was comprised of seven questions relating to group experience and one based on the impact of the community service project itself. Results: Significant findings revealed a positive correlation between the group experience and the feelings toward the project. In addition, multiple linear regressions suggested a positive and significant prediction. Conclusion: From the findings, implications for the development of experiential learning projects for use in the college classroom will be discussed. When paired with the results of previous research, the findings of this research can be very useful in developing group based service learning projects at the undergraduate level. Based upon the importance of service learning as an experiential teaching style, it is critical to understand how to better use this vehicle for discovery.

Roxanne Helm-Stevens; Orlando Griego

2009-01-01

235

Online Learning: A Student Perspective.  

Science.gov (United States)

An instructor taking an online course presents her view from the perspective of student. Discussion includes assuring the online course was acceptable for traditional course transfer credit; registering; e-mailing assignments while the Web conferencing system was down; class demographics; the backlog that occurred from not checking the system…

Gale, Carolyn

2000-01-01

236

Approaches to optimization of SS/TDMA time slot assignment  

Science.gov (United States)

Reduction techniques for traffic matrices are explored in some detail. These matrices arise in satellite switched time-division multiple access (SS/TDMA) techniques whereby switching of uplink and downlink beams is required to facilitate interconnectivity of beam zones. A traffic matrix is given to represent that traffic to be transmitted from n uplink beams to n downlink beams within a TDMA frame typically of 1 ms duration. The frame is divided into segments of time and during each segment a portion of the traffic is represented by a switching mode. This time slot assignment is characterized by a mode matrix in which there is not more than a single non-zero entry on each line (row or column) of the matrix. Investigation is confined to decomposition of an n x n traffic matrix by mode matrices with a requirement that the decomposition be 100 percent efficient or, equivalently, that the line(s) in the original traffic matrix whose sum is maximal (called critical line(s)) remain maximal as mode matrices are subtracted throughout the decomposition process. A method of decomposition of an n x n traffic matrix by mode matrices results in a number of steps that is bounded by n(2) - 2n + 2. It is shown that this upper bound exists for an n x n matrix wherein all the lines are maximal (called a quasi doubly stochastic (QDS) matrix) or for an n x n matrix that is completely arbitrary. That is, the fact that no method can exist with a lower upper bound is shown for both QDS and arbitrary matrices, in an elementary and straightforward manner.

Wade, T. O.

1984-01-01

237

Student Collaborative Networks and Academic Performance  

Science.gov (United States)

Undergraduate physics students commonly collaborate with one another on homework assignments, especially in more challenging courses. However, there currently exists a dearth of empirical research directly comparing the structure of students' collaborative networks to their academic performances in lower and upper division physics courses. We investigate such networks and associated performances through a mandated collaboration reporting system in two sophomore level and three junior level physics courses during the Fall 2012 and Spring 2013 semesters. We employ social network analysis to quantify the structure and time evolution of networks involving approximately 140 students. Analysis includes analytical and numerical assignments in addition to homework and exam scores. Preliminary results are discussed.

Schmidt, David; Bridgeman, Ariel; Kohl, Patrick

2013-04-01

238

Addressing AACSB Global and Technology Requirements: Exploratory Assessment of a Marketing Management Assignment  

Science.gov (United States)

|The Association to Advance Collegiate Schools of Business (AACSB) standards mandate knowledge of global and technology issues. Businesses desire employees with ability to analyze international markets and to be adept with technology. Taxpayers supporting public universities and organizations hiring business school graduates expect accountability…

Greene, Scott; Bao, Yongchuan

2009-01-01

239

Feature assignment in perception of auditory figure.  

UK PubMed Central (United Kingdom)

Because the environment often includes multiple sounds that overlap in time, listeners must segregate a sound of interest (the auditory figure) from other co-occurring sounds (the unattended auditory ground). We conducted a series of experiments to clarify the principles governing the extraction of auditory figures. We distinguish between auditory "objects" (relatively punctate events, such as a dog's bark) and auditory "streams" (sounds involving a pattern over time, such as a galloping rhythm). In Experiments 1 and 2, on each trial 2 sounds-an object (a vowel) and a stream (a series of tones)-were presented with 1 target feature that could be perceptually grouped with either source. In each block of these experiments, listeners were required to attend to 1 of the 2 sounds, and report its perceived category. Across several experimental manipulations, listeners were more likely to allocate the feature to an impoverished object if the result of the grouping was a good, identifiable object. Perception of objects was quite sensitive to feature variation (noise masking), whereas perception of streams was more robust to feature variation. In Experiment 3, the number of sound sources competing for the feature was increased to 3. This produced a shift toward relying more on spatial cues than on the potential contribution of the feature to an object's perceptual quality. The results support a distinction between auditory objects and streams, and provide new information about the way that the auditory world is parsed.

Gregg MK; Samuel AG

2012-08-01

240

Rule-based support system for multiple UMLS semantic type assignments.  

UK PubMed Central (United Kingdom)

BACKGROUND: When new concepts are inserted into the UMLS, they are assigned one or several semantic types from the UMLS Semantic Network by the UMLS editors. However, not every combination of semantic types is permissible. It was observed that many concepts with rare combinations of semantic types have erroneous semantic type assignments or prohibited combinations of semantic types. The correction of such errors is resource-intensive. OBJECTIVE: We design a computational system to inform UMLS editors as to whether a specific combination of two, three, four, or five semantic types is permissible or prohibited or questionable. METHODS: We identify a set of inclusion and exclusion instructions in the UMLS Semantic Network documentation and derive corresponding rule-categories as well as rule-categories from the UMLS concept content. We then design an algorithm adviseEditor based on these rule-categories. The algorithm specifies rules for an editor how to proceed when considering a tuple (pair, triple, quadruple, quintuple) of semantic types to be assigned to a concept. RESULTS: Eight rule-categories were identified. A Web-based system was developed to implement the adviseEditor algorithm, which returns for an input combination of semantic types whether it is permitted, prohibited or (in a few cases) requires more research. The numbers of semantic type pairs assigned to each rule-category are reported. Interesting examples for each rule-category are illustrated. Cases of semantic type assignments that contradict rules are listed, including recently introduced ones. CONCLUSION: The adviseEditor system implements explicit and implicit knowledge available in the UMLS in a system that informs UMLS editors about the permissibility of a desired combination of semantic types. Using adviseEditor might help accelerate the work of the UMLS editors and prevent erroneous semantic type assignments.

Geller J; He Z; Perl Y; Morrey CP; Xu J

2013-02-01

 
 
 
 
241

Consistent assignment of nurse aides: association with turnover and absenteeism.  

UK PubMed Central (United Kingdom)

Consistent assignment refers to the same caregivers consistently caring for the same residents almost every time caregivers are on duty. This article examines the association of consistent assignment of nurse aides with turnover and absenteeism. Data came from a survey of nursing home administrators, the Online Survey Certification and Reporting data, and the Area Resource File. The measures were from 2007 and came from 3,941 nursing homes. Multivariate logistic regression models were used to examine turnover and absenteeism. An average of 68% of nursing homes reported using consistent assignment, with 28% of nursing homes using nurse aides consistent assignment at the often recommended level of 85% (or more). Nursing homes using recommended levels of consistent assignment had significantly lower rates of turnover and of absenteeism. In the multivariate analyses, consistent assignment was significantly associated with both lower turnover and lower absenteeism (p < .01). Consistent assignment is a practice recommended by many policy makers, government agencies, and industry advocates. The findings presented here provide some evidence that the use of this staffing practice can be beneficial.

Castle NG

2013-01-01

242

Concepts and Spatial Abilities Required for Geometry Questions on the ENC/ENADE for University Students in Mathematics Teaching Programs Conceitos e Habilidades Espaciais Requeridos pelas Questões de Geometria do ENC/ENADE para a Licenciatura em Matemática  

Directory of Open Access Journals (Sweden)

Full Text Available This study analyzes the spatial geometry questions included in the National Examination of Courses (ENC) and the National Examination of Student Performance (Enade), from 1998 to 2005, with respect to the kind of statement and to the conceptual structure required. The categories of analysis were based on studies in cognitive psychology concerning levels of conceptual formation, the spatial component of mathematical ability, and the model of formation and manipulation of mental images. It was found that the majority of questions present verbal statements and require intermediate level of conceptualization, but demand mental operations related to spatial ability. Keywords: Psychology of Mathematical Education. Spatial Ability. Geometry Teaching. Enade.Este trabalho analisa as questões de geometria espacial constantes nas provas do Exame Nacional de Cursos - ENC — e do Exame Nacional de Desempenho dos Estudantes - Enade — de 1998 a 2005, quanto ao tipo de enunciado e à estrutura conceitual requerida. As categorias de análise foram formadas tendo como base estudos da psicologia cognitiva acerca dos níveis de formação conceitual, do componente espacial da habilidade matemática e do modelo de formação e manipulação de imagens mentais. Verificou-se que a maioria das questões apresenta enunciado verbal e requer nível intermediário de conceituação, mas exige operações mentais relativas à habilidade espacial. Palavras-chave: Psicologia da Educação Matemática. Habilidade Espacial. Ensino de Geometria. Enade.

Odaléa Aparecida Viana

2009-01-01

243

Solution NMR resonance assignment strategies for ?-barrel membrane proteins.  

UK PubMed Central (United Kingdom)

Membrane proteins in detergent micelles are large and dynamic complexes that present challenges for solution NMR investigations such as spectral overlap and line broadening. In this study, multiple methods are introduced to facilitate resonance assignment of ?-barrel membrane proteins using Opa60 from Neisseria gonorrhoeae as a model system. Opa60 is an eight-stranded ?-barrel with long extracellular loops (?63% of the protein) that engage host receptors and induce engulfment of the bacterium. The NMR spectra of Opa60 in detergent micelles exhibits significant spectral overlap and resonances corresponding to the loop regions had variable line widths, which interfered with a complete assignment of the protein. To assign the ?-barrel residues, trypsin cleavage was used to remove much of the extracellular loops while preserving the detergent solubilized ?-barrel. The removal of the loop resonances significantly improved the assignment of the Opa60 ?-barrel region (97% of the resonances corresponding to the ?-barrel and periplasmic turns were assigned). For the loop resonance assignments, two strategies were implemented; modulating temperature and synthetic peptides. Lowering the temperature broadened many peaks beyond detection and simplified the spectra to only the most dynamic regions of the loops facilitating 27 loop resonances to be assigned. To further assign functionally important and unstructured regions of the extracellular loops, a synthetic 20 amino acid peptide was synthesized and had nearly complete spectral overlap with the full-length protein allowing 17 loop resonances to be assigned. Collectively, these strategies are effective tools that may accelerate solution NMR structure determination of ?-barrel membrane proteins.

Fox DA; Columbus L

2013-08-01

244

Structure-based protein NMR assignments using native structural ensembles  

Energy Technology Data Exchange (ETDEWEB)

An important step in NMR protein structure determination is the assignment of resonances and NOEs to corresponding nuclei. Structure-based assignment (SBA) uses a model structure ('template') for the target protein to expedite this process. Nuclear vector replacement (NVR) is an SBA framework that combines multiple sources of NMR data (chemical shifts, RDCs, sparse NOEs, amide exchange rates, TOCSY) and has high accuracy when the template is close to the target protein's structure (less than 2 A backbone RMSD). However, a close template may not always be available. We extend the circle of convergence of NVR for distant templates by using an ensemble of structures. This ensemble corresponds to the low-frequency perturbations of the given template and is obtained using normal mode analysis (NMA). Our algorithm assigns resonances and sparse NOEs using each of the structures in the ensemble separately, and aggregates the results using a voting scheme based on maximum bipartite matching. Experimental results on human ubiquitin, using four distant template structures show an increase in the assignment accuracy. Our algorithm also improves the robustness of NVR with respect to structural noise. We provide a confidence measure for each assignment using the percentage of the structures that agree on that assignment. We use this measure to assign a subset of the peaks with even higher accuracy. We further validate our algorithm on data for two additional proteins with NVR. We then show the general applicability of our approach by applying our NMA ensemble-based voting scheme to another SBA tool, MARS. For three test proteins with corresponding templates, including the 370-residue maltose binding protein, we increase the number of reliable assignments made by MARS. Finally, we show that our voting scheme is sound and optimal, by proving that it is a maximum likelihood estimator of the correct assignments.

Apaydin, Mehmet Serkan; Conitzer, Vincent; Donald, Bruce Randall [Duke University, Department of Computer Science (United States)

2008-04-15

245

Dynamical Frequency Assignment of WSN Based on Cloud Computing Technology  

Directory of Open Access Journals (Sweden)

Full Text Available As the rapid development of Wireless Sensor Networks(WSN), the demands of frequency rose sharply, thereby how to deal with the frequency assignment of WSN is a difficult problem. A dynamical and real-time frequency assignment system is proposed, which was based on the network architecture of Internet of Things by the means of Cloud Computing technique. The system assigned the frequency dynamically and real-timely that it can improve the frequency utilization rate. This system is an efficient path to face the frequency needs of WSN.

JING Jun-li; YANG Jie

2012-01-01

246

RDC derived protein backbone resonance assignment using fragment assembly  

Energy Technology Data Exchange (ETDEWEB)

Experimental residual dipolar couplings (RDCs) in combination with structural models have the potential for accelerating the protein backbone resonance assignment process because RDCs can be measured accurately and interpreted quantitatively. However, this application has been limited due to the need for very high-resolution structural templates. Here, we introduce a new approach to resonance assignment based on optimal agreement between the experimental and calculated RDCs from a structural template that contains all assignable residues. To overcome the inherent computational complexity of such a global search, we have adopted an efficient two-stage search algorithm and included connectivity data from conventional assignment experiments. In the first stage, a list of strings of resonances (CA-links) is generated via exhaustive searches for short segments of sequentially connected residues in a protein (local templates), and then ranked by the agreement of the experimental {sup 13}C{sub {alpha}} chemical shifts and {sup 15}N-{sup 1}H RDCs to the predicted values for each local template. In the second stage, the top CA-links for different local templates in stage I are combinatorially connected to produce CA-links for all assignable residues. The resulting CA-links are ranked for resonance assignment according to their measured RDCs and predicted values from a tertiary structure. Since the final RDC ranking of CA-links includes all assignable residues and the assignment is derived from a 'global minimum', our approach is far less reliant on the quality of experimental data and structural templates. The present approach is validated with the assignments of several proteins, including a 42 kDa maltose binding protein (MBP) using RDCs and structural templates of varying quality. Since backbone resonance assignment is an essential first step for most of biomolecular NMR applications and is often a bottleneck for large systems, we expect that this new approach will improve the efficiency of the assignment process for small and medium size proteins and will extend the size limits assignable by current methods for proteins with structural models.

Wang Xingsheng; Tash, Brian; Flanagan, John M.; Tian Fang, E-mail: ftian@psu.edu [Pennsylvania State University, Department of Biochemistry and Molecular Biology, College of Medicine (United States)

2011-02-15

247

RDC derived protein backbone resonance assignment using fragment assembly  

International Nuclear Information System (INIS)

Experimental residual dipolar couplings (RDCs) in combination with structural models have the potential for accelerating the protein backbone resonance assignment process because RDCs can be measured accurately and interpreted quantitatively. However, this application has been limited due to the need for very high-resolution structural templates. Here, we introduce a new approach to resonance assignment based on optimal agreement between the experimental and calculated RDCs from a structural template that contains all assignable residues. To overcome the inherent computational complexity of such a global search, we have adopted an efficient two-stage search algorithm and included connectivity data from conventional assignment experiments. In the first stage, a list of strings of resonances (CA-links) is generated via exhaustive searches for short segments of sequentially connected residues in a protein (local templates), and then ranked by the agreement of the experimental 13C? chemical shifts and 15N-1H RDCs to the predicted values for each local template. In the second stage, the top CA-links for different local templates in stage I are combinatorially connected to produce CA-links for all assignable residues. The resulting CA-links are ranked for resonance assignment according to their measured RDCs and predicted values from a tertiary structure. Since the final RDC ranking of CA-links includes all assignable residues and the assignment is derived from a “global minimum”, our approach is far less reliant on the quality of experimental data and structural templates. The present approach is validated with the assignments of several proteins, including a 42 kDa maltose binding protein (MBP) using RDCs and structural templates of varying quality. Since backbone resonance assignment is an essential first step for most of biomolecular NMR applications and is often a bottleneck for large systems, we expect that this new approach will improve the efficiency of the assignment process for small and medium size proteins and will extend the size limits assignable by current methods for proteins with structural models.

2011-01-01

248

Assessing medical students’ competence in calculating drug doses  

Directory of Open Access Journals (Sweden)

Full Text Available Evidence suggests that healthcare professionals are not optimally able to calculate medicine doses and various strategies have been employed to improve these skills. In this study, the performance of third and fourth year medical students was assessed and the success of various educational interventions investigated. Students were given four types of dosing calculations typical of those required in an emergency setting. Full competence (at the 100% level) was defined as correctly answering all four categories of calculation at any one time. Three categories correct meant competence at the 75% level. Interventions comprised an assignment with a model answer for self-assessment in the third year and a small group tutorial in the fourth year. The small groups provided opportunities for peer-assisted learning. A subgroup of 23 students received individual tuition from the lecturer prior to the start of the fourth year. Amongst the 364 eligible students, full competence rose from 23% at the beginning of the third year to 66% by the end of the fourth year. More students succeeded during the fourth than the third year of study. Success of small group tuition was assessed in a sample of 200 students who had formal assessments both before and after the fourth year tuition. Competence at the 75% level improved by 10% in attendees and decreased by 3% in non-attendees, providing evidence of the value of students receiving assistance from more able same-language peers. Good results were achieved with one-on-one tuition where individualised assistance allowed even struggling students to improve.

Catherine Harries; Julia Botha

2013-01-01

249

VESTA Student Profiles  

Science.gov (United States)

These vignettes, from the Viticulture and Enology Science and Technology Alliance, showcase students' experiences as they learn the science and skills required for the grape and wine industry and begin their careers in this exciting and exploding field. Students from Iowa, Missouri, Illinois, and Oklahoma are represented. Each experience is documented on a one- or two-page PDF.

2011-09-22

250

The importance of active learning and practice on the students' mastery of pharmacokinetic calculations for the intermittent intravenous infusion dosing of antibiotics  

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Full Text Available Abstract Background Estimation of pharmacokinetic parameters after intermittent intravenous infusion (III) of antibiotics, such as aminoglycosides or vancomycin, has traditionally been a difficult subject for students in clinical pharmacology or pharmacokinetic courses. Additionally, samples taken at different intervals during repeated dose therapy require manipulation of sampling times before accurate calculation of the patient-specific pharmacokinetic parameters. The main goal of this study was to evaluate the effectiveness of active learning tools and practice opportunities on the ability of students to estimate pharmacokinetic parameters from the plasma samples obtained at different intervals following intermittent intravenous infusion. Methods An extensive reading note, with examples, and a problem case, based on a patient’s chart data, were created and made available to students before the class session. Students were required to work through the case before attending the class. The class session was devoted to the discussion of the case requiring active participation of the students using a random participation program. After the class, students were given additional opportunities to practice the calculations, using online modules developed by the instructor, before submitting an online assignment. Results The performance of students significantly (P?P? Conclusions Despite being a difficult subject, students achieve mastery of pharmacokinetic calculations for the topic of intermittent intravenous infusion when appropriate active learning strategies and practice opportunities are employed.

Mehvar Reza

2012-01-01

251

The relationship between different kinds of students' errors and the knowledge required to solve mathematics word problems/ A relação entre diferentes tipos de erros cometidos por estudantes e o conhecimento exigido para resolver problemas-palavra  

Scientific Electronic Library Online (English)

Full Text Available Abstract in portuguese O principal objetivo desta pesquisa é examinar a relação entre diferentes tipos de erros cometidos por estudantes e os conhecimentos necessários para resolver situações-problema em Álgebra, Aritmética e Geometria. Para a análise de erros seguimos as considerações de Kinfong e Holtan e para investigar o conhecimento necessário para ultrapassar os erros mobilizamos a teoria de Mayer. A metodologia de pesquisa é semi-experimental, envolvendo um teste de matemát (more) ica com seis questões e entrevistas dirigidas. Os resultados da pesquisa revelaram que os erros na solução dos problemas-palavra aritméticos resultaram da falta de conhecimentos linguísticos, semânticos, estruturais e comunicativos; no que diz respeito aos problemas-palavra, os erros vinculam-se à lacunas no conhecimento semântico, estrutural e intuitivo. Em relação aos problemas-palavra algébricos os erros devem-se a lacunas quanto às operações matemáticas. Em síntese, os resultados mostram que a maior deficiência dos alunos relaciona-se a lacunas relativas ao conhecimento semântico, estrutural e comunicativo. Abstract in english The main objective of this research is to examine the relationship between different kinds of errors and the knowledge required to solve word problems in Arithmetic, Algebra and Geometry. Kinfong's and Holtan's framework supports the analysis of the errors, and Mayer's theory was implemented to understand the necessary knowledge for solving math word problems. The research methodology follows a semi-experimental method. Research tools comprise both a descriptive math test (more) and a directed interview. The research findings revealed that students' errors when solving arithmetic word problems result from the lack of linguistic, semantic, structural and communicational knowledge; when solving the geometric word problems, the lack of semantic, intuition and structural knowledge were the cause of the students' errors. Regarding algebra word problems, miscalculation was the reason for the higher error rate. Results show that the highest deficiency is mainly related to the lack of semantic, structural and communicational knowledge.

Haghverdi, Majid; Semnani, Ahmad Shahvarani; Seifi, Mohammad

2012-04-01

252

Disulphide bond assignment in human tissue inhibitor of metalloproteinases (TIMP).  

UK PubMed Central (United Kingdom)

Disulphide bonds in human recombinant tissue inhibitor of metalloproteinases (TIMP) were assigned by resolving proteolytic digests of TIMP on reverse-phase h.p.l.c. and sequencing those peaks judged to contain disulphide bonds by virtue of a change in retention time on reduction. This procedure allowed the direct assignment of Cys-145-Cys-166 and the isolation of two other peptides containing two disulphide bonds each. Further peptide cleavage in conjunction with fast-atom-bombardment m.s. analysis permitted the assignments Cys-1-Cys-70, Cys-3-Cys-99, Cys-13-Cys-124 and Cys-127-Cys-174 from these peptides. The sixth bond Cys-132-Cys-137 was assigned by inference, as the native protein has no detectable free thiol groups.

Williamson RA; Marston FA; Angal S; Koklitis P; Panico M; Morris HR; Carne AF; Smith BJ; Harris TJ; Freedman RB

1990-06-01

253

A Peer-Reviewed Research Assignment for Large Classes  

Science.gov (United States)

One way science educators can integrate writing, critical-thinking and team-building skills into their curriculum is by incorporating a collaborative, peer-evaluated research paper assignment. This type of exercise reduces an instructor's heavy grading lo

Buising, Charisse; Henderson, Larhee

2000-10-01

254

Task Assignment Problem Solved by Continuous Hopfield Network  

Directory of Open Access Journals (Sweden)

Full Text Available The task assignment problem with non uniform communication costs (TAP) consists in finding an assignment of the tasks to the processors such that the total execution and communication costs is minimized. This problem is naturally formulated as 0-1 quadratic programming subject to linear constraints (QP). In this paper, we propose a new approach to solve the task assignment problem with non uniform communication costs using the continuous Hopfield network (CHN). This approach is based on some energy or Lyapunov function, which diminishes as the system develops until a local minimum value is obtained. We show that this approach is able to determine a good solution for this problem. Finally, some computational experiments solving the task assignment problem with non-uniform communication costs are shown.

Ettaouil Mohamed; Loqman Chakir; Hami Youssef; Haddouch Khalid

2012-01-01

255

Recommender Systems for the Conference Paper Assignment Problem  

CERN Multimedia

Conference paper assignment, i.e., the task of assigning paper submissions to reviewers, presents multi-faceted issues for recommender systems research. Besides the traditional goal of predicting `who likes what?', a conference management system must take into account aspects such as: reviewer capacity constraints, adequate numbers of reviews for papers, expertise modeling, conflicts of interest, and an overall distribution of assignments that balances reviewer preferences with conference objectives. Among these, issues of modeling preferences and tastes in reviewing have traditionally been studied separately from the optimization of paper-reviewer assignment. In this paper, we present an integrated study of both these aspects. First, due to the paucity of data per reviewer or per paper (relative to other recommender systems applications) we show how we can integrate multiple sources of information to learn paper-reviewer preference models. Second, our models are evaluated not just in terms of prediction accu...

Conry, Don; Ramakrishnan, Naren

2009-01-01

256

Stabilizing Interference-Free Slot Assignment for Wireless Mesh Networks  

Science.gov (United States)

In this chapter, we focus on stabilizing interference-free slot assignment to WMN nodes. These slot assignments allow each node to transmit its data while ensuring that it does not interfere with other nodes. We proceed as follows: First, we focus on infrastructure-only part where we only consider static infrastructure nodes. We present three algorithms in this category. The first two are based on communication topology and address centralized or distributed slot assignment. The third focuses on slot assignment where infrastructure nodes are deployed with some geometric distribution to cover the desired area. Subsequently, we extend this protocol for the case where there are mobile client nodes that are in the vicinity of the infrastructure nodes. And, finally, we present an algorithm for the case where a client node is only in the vicinity of other client nodes.

Arumugam, Mahesh; Jhumka, Arshad; Abujarad, Fuad; Kulkarni, Sandeep S.

257

A demand assignment control in international business satellite communications network  

Science.gov (United States)

An experimental system is being developed for use in an international business satellite (IBS) communications network based on demand-assignment (DA) and TDMA techniques. This paper discusses its system design, in particular from the viewpoints of a network configuration, a DA control, and a satellite channel-assignment algorithm. A satellite channel configuration is also presented along with a tradeoff study on transmission rate, HPA output power, satellite resource efficiency, service quality, and so on.

Nohara, Mitsuo; Takeuchi, Yoshio; Takahata, Fumio; Hirata, Yasuo

258

A practical approach to SS/TDMA time slot assignment  

Science.gov (United States)

Time slot assignment problem for a satellite switched/time division multiple access (SS/TDMA) system is discussed and an algorithm is proposed which maintains the assignment efficiency provided by previous algorithms and moreover reduces the number of connection time slots. This provides an easier identification step during burst time plan changes and tends to reduce the amount of signalling and transmitting time on the service channel. Simulation results are presented for (10 x 10) traffic matrices.

Maral, G.; Bousquet, M.; Wattier, P.

259

PARETO OPTIMAL SOLUTIONS FOR MULTI-OBJECTIVE GENERALIZED ASSIGNMENT PROBLEM  

Directory of Open Access Journals (Sweden)

Full Text Available ENGLISH ABSTRACT: The Multi-Objective Generalized Assignment Problem (MGAP) with two objectives, where one objective is linear and the other one is non-linear, has been considered, with the constraints that a job is assigned to only one worker – though he may be assigned more than one job, depending upon the time available to him. An algorithm is proposed to find the set of Pareto optimal solutions of the problem, determining assignments of jobs to workers with two objectives without setting priorities for them. The two objectives are to minimise the total cost of the assignment and to reduce the time taken to complete all the jobs.AFRIKAANSE OPSOMMING: ‘n Multi-doelwit veralgemeende toekenningsprobleem (“multi-objective generalised assignment problem – MGAP”) met twee doelwitte, waar die een lineêr en die ander nielineêr is nie, word bestudeer, met die randvoorwaarde dat ‘n taak slegs toegedeel word aan een werker – alhoewel meer as een taak aan hom toegedeel kan word sou die tyd beskikbaar wees. ‘n Algoritme word voorgestel om die stel Pareto-optimale oplossings te vind wat die taaktoedelings aan werkers onderhewig aan die twee doelwitte doen sonder dat prioriteite toegeken word. Die twee doelwitte is om die totale koste van die opdrag te minimiseer en om die tyd te verminder om al die take te voltooi.

S. Prakash; M.K. Sharma; A. Singh

2012-01-01

260

Resource assignment in multi-granularity switching optical network  

Science.gov (United States)

Multi-granularity switching is an attractive technology, which can not only save the network cost but also realize traffic grooming. There are many different sizes tunnels available in multi-granularity optical network, so resource assignment becomes very important for lightpath establishment. In this paper, we focus on the research in waveband switching (WBS) network. Firstly the node structure and multi-granularity connections are analyzed, and the term of RRA (routing and resource assignment) is proposed to state the problem of lightpath establishment. And a kind of resource assignment policy for RRA is proposed according to the tunnel granularity. As a part of resource assignment in WBS network, the problem of waveband paths assignment is discussed and several new dynamic algorithms are proposed. They are SBP (shortest waveband path), FBP (first-fit waveband path), LBP (longest waveband path) and LBC (longest waveband combination) algorithms. In our numerical simulations, some factors that impact the performance of network are analyzed, such as waveband assignment algorithm, switching ratios and waveband partition. And also some useful conclusions are drawn, which are instructive for the design and implementation of multi-granularity network.

Song, Hongsheng; Gui, Xuan; Zhang, Jie; Gu, Wanyi

2004-10-01

 
 
 
 
261

Evaluating the Effects of Virtual Pair Programming on Students’ Achievement and Satisfaction  

Directory of Open Access Journals (Sweden)

Full Text Available Pair programming is a lightweight software development technique in which two programmers work together at one computer. In literature, many benefits of pair programming have been proposed, such as increased productivity, improved code quality, enhanced job satisfaction and confidence. Although pair programming provides clear pedagogical benefits, its collocation requirement and the limited time during a lab session are serious barriers in the full deployment and evaluation of this programming technique. This paper reports on a study that investigated the effectiveness of Virtual Pair Programming (VPP) on student performance and satisfaction in an introductory Java course where students worked collaboratively in pairs on homework programming assignments, using online tools that integrated desktop sharing and real time communication. The results of this study support previous research findings and suggest that VPP is an effective pedagogical tool for flexible collaboration and an acceptable alternative to individual/solo programming experience, regarding productivity, code quality, academic performance and student satisfaction.

Nick Zacharis

2009-01-01

262

"GET IT! WRITE" - DEVELOPING AN ONLINE RESOURCE TO AID STUDENT ACADEMIC WRITING: A JOURNEY OF DISCOVERY  

Directory of Open Access Journals (Sweden)

Full Text Available The central focus of this paper is the authors'experiences developing an online program to assist students improve their academic writing and referencing skills in response to increasingly poor levels of student expression and quality of submitted work. The ten modules provide students with access to theory on the process and skills required in preparing tertiary level assignments and then the opportunity to practice these skills. Sociocultural and constructivist theory underpin the structure of the online program. As writers and developers familiar with academic processes we engaged with a discourse with each other and more capable others to learn new skills particularly with respect to WebCT. This was a complex process characterised by role switching so that there was not an ongoing distinct demarcation of novice and expert.

Robyn Joy Gregson; Marilyn Kell

2007-01-01

263

Development of research paper writing skills of poultry science undergraduate students studying food microbiology.  

UK PubMed Central (United Kingdom)

Because food and poultry industries are demanding an improvement in written communication skills among graduates, research paper writing should be an integral part of a senior undergraduate class. However, scientific writing assignments are often treated as secondary to developing the technical skills of the students. Scientific research paper writing has been emphasized in an undergraduate course on advanced food microbiology taught in the Poultry Science Department at Texas A& M University (College Station, TX). Students' opinions suggest that research paper writing as part of a senior course in Poultry Science provides students with scientific communication skills and useful training for their career, but more emphasis on reading and understanding scientific literature may be required.

Howard ZR; Donalson LM; Kim WK; Li X; Zabala Díaz I; Landers KL; Maciorowski KG; Ricke SC

2006-02-01

264

Development of research paper writing skills of poultry science undergraduate students studying food microbiology.  

Science.gov (United States)

Because food and poultry industries are demanding an improvement in written communication skills among graduates, research paper writing should be an integral part of a senior undergraduate class. However, scientific writing assignments are often treated as secondary to developing the technical skills of the students. Scientific research paper writing has been emphasized in an undergraduate course on advanced food microbiology taught in the Poultry Science Department at Texas A& M University (College Station, TX). Students' opinions suggest that research paper writing as part of a senior course in Poultry Science provides students with scientific communication skills and useful training for their career, but more emphasis on reading and understanding scientific literature may be required. PMID:16523638

Howard, Z R; Donalson, L M; Kim, W K; Li, X; Zabala Díaz, I; Landers, K L; Maciorowski, K G; Ricke, S C

2006-02-01

265

TARGETING L2 WRITING PROFICIENCIES: INSTRUCTION AND AREAS OF CHANGE IN STUDENTS' WRITING OVER TIME  

Directory of Open Access Journals (Sweden)

Full Text Available Writing in a second language is a complex activity requiring proficiency in a number of different areas. l Writing programmes often focus on particular areas of skill and knowledge that are seen as important to the overall process. This study looks at the effects of the focus of teaching on student writing. Fifty students on an eight-week pre-sessional programme were asked to write a 250-word assignment at the start and the end of their courses. These were graded on a nineband scale using a seven-trait multiple-trait scoring system. The results show that discourse organisation and argumentation, which were the primary focus of classroom study, improved more than other areas. This suggests that tutors should look at writing proficiency in terms of an overall balance of proficiencies and that targeting aspects of student writing can affect this overall balance.

Alasdair Archibald

2001-01-01

266

Alimentação na escola como forma de atender às recomendações nutricionais de alunos dos Centros Integrados de Educação Pública (CIEPS)/ School meal programs as a means to meet nutritional requirements for students in the Integrated Public School Centers (CIEPS)  

Scientific Electronic Library Online (English)

Full Text Available Abstract in portuguese Avalia-se o consumo alimentar de 244 crianças amostradas utilizando-se o registro dos alimentos por elas ingeridos, durante três dias não consecutivos da semana. Analisa-se a adequação de energia e nutrientes de acordo com o padrão definido para a população brasileira. Observa-se que a dieta dos escolares revela-se, em média, deficiente em energia: as refeições consumidas no âmbito dos CIEPs não alcançam 70% de adequação. Verifica-se que, inversamente, o c (more) onteúdo protéico das dietas apresenta-se muito acima do preconizado. Ressalta-se a satisfatória adequação das refeições consumidas no âmbito dos CIEPs quanto às vitaminas A, tiamina, riboflavina e niacina. Merece destaque a surpreendente adequação das dietas dos escolares em relação ao ácido ascórbico. Contribui para esse resultado a presença freqüente de frutas cítricas nas refeições da escola. Com relação ao ferro, constata-se que, com exceção dos escolares mais velhos, todos os demais exibem dietas que ultrapassam 90% de adequação. Quanto ao cálcio, nota-se que as dietas da maioria (exceto a dos alunos de maior idade) alcançam 100% de adequação. Resultados do estudo mostram necessidade de corrigir falhas do conteúdo nutricional das refeições distribuídas na escola, pois as mesmas constituem parte fundamental do consumo alimentar dos alunos dos CIEPs. Abstract in english This study evaluates food intake of 244 children between ages 7-13 years using records of ingested foods on three non-consecutive days. The study analyzes energy and nutrient adequacy based on standards for the Brazilian population. Diet was generally found to be energy-deficient: meals consumed at the CIEPs met less than 70% of the requirement. On the other hand, protein was well above recommended levels. Worthy of note was the adequacy of meals in the CIEPs as to vitami (more) n A, thiamin, riboflavin, and niacin, as well as the surprising adequacy of ascorbic acid, resulting from the frequent presence of citrus fruits in school meals. Except for older students, all schoolchildren studied had greater than 90% minimum iron intake. As for calcium, again except for older ones, consumption was 100% or more of minimum required levels. Results showed the need to correct flaws in the nutritional content of school meals, which are central to dietary intake for CIEP students.

Silva, Marina Vieira da

1998-01-01

267

Alimentação na escola como forma de atender às recomendações nutricionais de alunos dos Centros Integrados de Educação Pública (CIEPS) School meal programs as a means to meet nutritional requirements for students in the Integrated Public School Centers (CIEPS)  

Directory of Open Access Journals (Sweden)

Full Text Available Avalia-se o consumo alimentar de 244 crianças amostradas utilizando-se o registro dos alimentos por elas ingeridos, durante três dias não consecutivos da semana. Analisa-se a adequação de energia e nutrientes de acordo com o padrão definido para a população brasileira. Observa-se que a dieta dos escolares revela-se, em média, deficiente em energia: as refeições consumidas no âmbito dos CIEPs não alcançam 70% de adequação. Verifica-se que, inversamente, o conteúdo protéico das dietas apresenta-se muito acima do preconizado. Ressalta-se a satisfatória adequação das refeições consumidas no âmbito dos CIEPs quanto às vitaminas A, tiamina, riboflavina e niacina. Merece destaque a surpreendente adequação das dietas dos escolares em relação ao ácido ascórbico. Contribui para esse resultado a presença freqüente de frutas cítricas nas refeições da escola. Com relação ao ferro, constata-se que, com exceção dos escolares mais velhos, todos os demais exibem dietas que ultrapassam 90% de adequação. Quanto ao cálcio, nota-se que as dietas da maioria (exceto a dos alunos de maior idade) alcançam 100% de adequação. Resultados do estudo mostram necessidade de corrigir falhas do conteúdo nutricional das refeições distribuídas na escola, pois as mesmas constituem parte fundamental do consumo alimentar dos alunos dos CIEPs.This study evaluates food intake of 244 children between ages 7-13 years using records of ingested foods on three non-consecutive days. The study analyzes energy and nutrient adequacy based on standards for the Brazilian population. Diet was generally found to be energy-deficient: meals consumed at the CIEPs met less than 70% of the requirement. On the other hand, protein was well above recommended levels. Worthy of note was the adequacy of meals in the CIEPs as to vitamin A, thiamin, riboflavin, and niacin, as well as the surprising adequacy of ascorbic acid, resulting from the frequent presence of citrus fruits in school meals. Except for older students, all schoolchildren studied had greater than 90% minimum iron intake. As for calcium, again except for older ones, consumption was 100% or more of minimum required levels. Results showed the need to correct flaws in the nutritional content of school meals, which are central to dietary intake for CIEP students.

Marina Vieira da Silva

1998-01-01

268

Causal effects of single-sex schools on college entrance exams and college attendance: random assignment in Seoul high schools.  

UK PubMed Central (United Kingdom)

Despite the voluminous literature on the potentials of single-sex schools, there is no consensus on the effects of single-sex schools because of student selection of school types. We exploit a unique feature of schooling in Seoul-the random assignment of students into single-sex versus coeducational high schools-to assess causal effects of single-sex schools on college entrance exam scores and college attendance. Our validation of the random assignment shows comparable socioeconomic backgrounds and prior academic achievement of students attending single-sex schools and coeducational schools, which increases the credibility of our causal estimates of single-sex school effects. The three-level hierarchical model shows that attending all-boys schools or all-girls schools, rather than coeducational schools, is significantly associated with higher average scores on Korean and English test scores. Applying the school district fixed-effects models, we find that single-sex schools produce a higher percentage of graduates who attended four-year colleges and a lower percentage of graduates who attended two-year junior colleges than do coeducational schools. The positive effects of single-sex schools remain substantial, even after we take into account various school-level variables, such as teacher quality, the student-teacher ratio, the proportion of students receiving lunch support, and whether the schools are public or private.

Park H; Behrman JR; Choi J

2013-04-01

269

Agreement on diagnoses of mental health problems between an online clinical assignment and a routine clinical assignment.  

UK PubMed Central (United Kingdom)

We examined the agreement between diagnoses assigned based on the Development and Well Being Assessment (DAWBA) information collected online, and ordinary day-to-day diagnostic assignment by Child and Adolescent Mental Health Service (CAMHS) clinicians. Diagnoses were compared for 286 patients. Raw agreement for diagnostic categories was 74-90%, resulting in kappa values of 0.41-0.49. Multinomial regression models for 'emotional diagnosis' and 'hyperkinetic/conduct diagnosis' were significant (P < 0.001). Age, gender and number of informants significantly contributed to the explanation of agreement and disagreement. Agreement on mental health diagnoses may be sufficient to replace routine clinical assignment of diagnoses with an online clinical assignment, thereby saving time and resources.

Brøndbo PH; Mathiassen B; Martinussen M; Handegård BH; Kvernmo S

2013-02-01

270

Predictors of academic performance in a cohort of pre-registration nursing students.  

UK PubMed Central (United Kingdom)

The recruitment, selection and retention of nursing students have become crucial in securing the future workforce required by the NHS. Concerns regarding the academic performance of what is a changing student profile led to an audit being performed to explore the predictive relationship between entry qualifications, age, gender, attendance and academic performance in a cohort of pre-registration Diploma of Nursing students. Data was collated from a cohort of 154 students. Statistical analysis demonstrated that students with higher level entry qualifications performed consistently better than those with lower level qualifications. Mature students, over the age of 26, achieved better average marks in coursework and examinations that their younger peers. Year 1 performance predicted year 3 performance in both examinations and assignments. Non-attendance was shown to have an impact on academic performance with a correlation existing between high absenteeism and poor academic achievement. The findings highlight interesting issues for nurse educators relating to academic student support particularly in first year; recruitment and selection of the most suitable candidates; absenteeism monitoring and curriculum design.

McCarey M; Barr T; Rattray J

2007-05-01

271

Mastering the Concepts of Geologic Time: Novice Students' Understanding of the Principles of Relative Age  

Science.gov (United States)

Misconceptions can adversely affect students’ mastery of the fundamental geoscience concepts necessary for development of the knowledge base required to become a professional geoscientist. In the fall of 2009, in-class learning assessments were introduced into a large (400 student) undergraduate introductory geoscience course to help students develop expert-like problem solving skills for geologic problems. They were also designed to reveal students’ misconceptions on geoscience concepts in order to help direct the course of instruction. These assessments were based on simple, real-world scenarios that geoscientists encounter in their research. One of these assessments focused on the application of concepts of geologic time. It asked students to give the relative ages of granite, schist and shale based on a sketch of two outcrops, and to describe the reasoning behind their answer. In order to test all of the principles of relative age, the assignment had two possible solutions. A post-course analysis of student responses on these assessments was carried out using a modified constant comparative analysis method to identify common misconceptions. This analysis revealed that 61% of students failed to identify both possible solutions. Furthermore, 55% of students applied the principle of superposition to intrusive igneous and metamorphic rocks, and 18% treated the once connected outcrops as having separate geologic histories. 56% of students could not support their proposed geologic history with appropriate reasoning. These results suggest that the principles of relative geologic time that students had the greatest difficulty with were when to apply the principle of superposition and how to apply the principle of original continuity. Students also had difficulty using the principles of relative age to provide appropriate scientific reasoning for their choices.

Speta, M.; Reid, L.

2010-12-01

272

An Ideal Mass Assignment Scheme for Measuring the Power Spectrum with Fast Fourier Transforms  

Science.gov (United States)

In measuring the power spectrum of the distribution of large numbers of dark matter particles in simulations, or galaxies in observations, one has to use fast Fourier transforms (FFT) for calculational efficiency. However, because of the required mass assignment onto grid points in this method, the measured power spectrum obtained with an FFT is not the true power spectrum P(k), but instead, one that is convolved with a window function |W(k)|2 in Fourier space. In a recent paper, Jing proposed an elegant algorithm to deconvolve the sampling effects of the window function and to extract the true power spectrum, and tests using N-body simulations show that this algorithm works very well for the three most commonly used mass assignment functions, i.e., the nearest grid point, the cloud-in-cell, and the triangular-shaped cloud methods. In this paper, rather than trying to deconvolve the sampling effects of the window function, we propose to select a particular function in performing the mass assignment that can minimize these effects. An ideal window function should fulfill the following criteria: (1) compact top-hat-like support in Fourier space to minimize the sampling effects; and (2) compact support in real space to allow a fast and computationally feasible mass assignment onto grids. We find that the scale functions of Daubechies wavelet transformations are good candidates for such a purpose. Our tests using data from the Millennium Simulation show that the true power spectrum of dark matter can be accurately measured at a level better than 2% up to k=0.7kN, without applying any deconvolution processes. The new scheme is especially valuable for measurements of higher order statistics, e.g., the bispectrum, where it can render the mass assignment effects negligible up to comparatively high k.

Cui, Weiguang; Liu, Lei; Yang, Xiaohu; Wang, Yu; Feng, Longlong; Springel, Volker

2008-11-01

273

Impact of Journaling on Students’ Self-Efficacy and Locus of Control  

Directory of Open Access Journals (Sweden)

Full Text Available While considerable research has examined the academic and cognitive value of journaling, little has examined the psychological impact of journaling on the personal development of college students. Research on cognitive-behavioral therapy indicates that journaling can have a positive impact on individuals’ self-growth and intrapersonal characteristics. The purpose of this study is to examine the impact of classroom-based journaling on students’ self-efficacy and locus of control. Students in two undergraduate courses were required to complete weekly journal assignments; one class received targeted information on cognitive-behavioral therapy (CBT) and one class did not. Students completed pre-, mid-, and post-course assessments on self-efficacy, locus of control, and learning. Results revealed that self-efficacy scores for both groups significantly improved after the early journaling assignments; however, there were no differences between those who received direct CBT instruction and those who did not. These findings indicate that journaling may have important psychological benefits above and beyond its expected academic and cognitive outcomes.

Krista K. Fritson

2008-01-01

274

Class Participation in an Aboriginal Theatre Project: An Exemplar of Undergraduate Student Engagement  

Science.gov (United States)

In the 21st Century, Canadian universities are increasingly emphasizing the importance of student engagement. This research paper, by analyzing the reflections of undergraduate students on their experiences in a co-curricular service learning assignment--integrated into a course that included more traditional assignments--in the context of…

Ratsoy, Ginny R.

2011-01-01

275

From Student Resistance to Embracing the Sociological Imagination: Unmasking Privilege, Social Conventions, and Racism.  

Science.gov (United States)

|Discusses experiences in teaching the meaning and value of the sociological imagination to a group of ethnically and economically privileged students. Describes an assignment asking students to critically assess agendas, fallacies, and consequences of scientific racism. Finds evaluations reflect that the assignment conveyed that sociological…

Haddad, Angela T.; Lieberman, Leonard

2002-01-01

276

Preparing Computing Students for Culturally Diverse E-Mediated IT Projects  

Science.gov (United States)

In this paper we present an account of an undergraduate team-based assignment designed to facilitate, exhibit and record team-working skills in an e-mediated environment. By linking the student feedback received to Hofstede's classic model of cultural dimensions we aim to show the assignment's suitability in revealing the student's multi-cultural…

Conrad, Marc; French, Tim; Maple, Carsten; Zhang, Sijing

2006-01-01

277

Self-recording and student teacher supervision: variables within a token economy structure1  

Digital Repository Infrastructure Vision for European Research (DRIVER)

A token system was used to attempt to increase the accuracy with which special education students answered questions about reading assignments. In the token system, students recorded their own data, received toy money for accurately completing assignments, and were allowed to spend their toy money a...

Knapczyk, Dennis R.; Livingston, Gary

278

Ethical issues confronted by medical students during clinical rotations.  

UK PubMed Central (United Kingdom)

OBJECTIVES: This study aimed to examine the most common and important ethical issues confronting medical students during clinical rotations so that ethics-related topics can be prioritised according to students' needs and this information used to develop a curriculum for the ethics course. METHODS: In a cross-sectional approach, we reviewed the medical ethics-related cases recorded in the logbooks of all medical students (n=241) at Tehran University of Medical Sciences who attended the medical ethics course during October 2006 to July 2007. As part of a graded assignment, each student was required to record three encounters with ethics-related issues in his or her logbook. A total of 713 cases were assessed. Information related to the ethical issues and the conditions in which ethical issues arose was extracted and recorded by two experts, whose analysis showed agreement of kappa 0.77. In cases of discrepancy, both experts reviewed and discussed the record until they achieved agreement. RESULTS: A total of 713 cases were analysed. The most common issues reported by students related to ethics in medical education (20.1%, n=143), professionalism (18.8%, n=134), confidentiality (7.6%, n=54), the doctor-patient relationship (7.3%, n=52), informed consent (7.0%, n=50) and the doctor-peer relationship (7.0%, n=50). After adjusting for length of rotation, the highest numbers of ethics-related incidents were reported from urology, general surgery, orthopaedics, internal medicine, neurology, and obstetrics and gynaecology wards. CONCLUSIONS: The results of this study indicate that professionalism and related elements represent one of the most important areas of concern that need to be addressed when planning courses for medical students. The other significant area of concern is that of ethics in medical education, which, although the subject is not considered essential for medical practitioners, should be taught and respected so that student sensitivity to medical ethics is maintained and even increased.

Fard NN; Asghari F; Mirzazadeh A

2010-07-01

279

Student research activities in the Technology Assessments Section of the Health and Safety Research Division, Summer 1980  

Energy Technology Data Exchange (ETDEWEB)

Reports summarizing activities of students assigned to the Technology Assessments Section of the Health and Safety Research Division for the summer 1980 are presented. Unless indicated otherwise, each report was written by the student whose work is being described. For each student, the student's supervisor, the name of the program under which the student was brought to ORNL, the academic level of the student, and the name of the ORNL project to which the student was assigned are tabulated. The reports are presented in alphabetical order of the students' last names.

Chester, R.O.; Roberts, D.A.

1981-08-01

280

Student research activities in the Technology Assessments Section of the Health and Safety Research Division, Summer 1980  

International Nuclear Information System (INIS)

[en] Reports summarizing activities of students assigned to the Technology Assessments Section of the Health and Safety Research Division for the summer 1980 are presented. Unless indicated otherwise, each report was written by the student whose work is being described. For each student, the student's supervisor, the name of the program under which the student was brought to ORNL, the academic level of the student, and the name of the ORNL project to which the student was assigned are tabulated. The reports are presented in alphabetical order of the students' last names

1981-01-01

 
 
 
 
281

Socially-assigned race, healthcare discrimination and preventive healthcare services.  

UK PubMed Central (United Kingdom)

BACKGROUND: Race and ethnicity, typically defined as how individuals self-identify, are complex social constructs. Self-identified racial/ethnic minorities are less likely to receive preventive care and more likely to report healthcare discrimination than self-identified non-Hispanic whites. However, beyond self-identification, these outcomes may vary depending on whether racial/ethnic minorities are perceived by others as being minority or white; this perception is referred to as socially-assigned race. PURPOSE: To examine the associations between socially-assigned race and healthcare discrimination and receipt of selected preventive services. METHODS: Cross-sectional analysis of the 2004 Behavioral Risk Factor Surveillance System "Reactions to Race" module. Respondents from seven states and the District of Columbia were categorized into 3 groups, defined by a composite of self-identified race/socially-assigned race: Minority/Minority (M/M, n?=?6,837), Minority/White (M/W, n?=?929), and White/White (W/W, n?=?25,913). Respondents were 18 years or older, with 61.7% under age 60; 51.8% of respondents were female. Measures included reported healthcare discrimination and receipt of vaccinations and cancer screenings. RESULTS: Racial/ethnic minorities who reported being socially-assigned as minority (M/M) were more likely to report healthcare discrimination compared with those who reported being socially-assigned as white (M/W) (8.9% vs. 5.0%, p?=?0.002). Those reporting being socially-assigned as white (M/W and W/W) had similar rates for past-year influenza (73.1% vs. 74.3%) and pneumococcal (69.3% vs. 58.6%) vaccinations; however, rates were significantly lower among M/M respondents (56.2% and 47.6%, respectively, p-values<0.05). There were no significant differences between the M/M and M/W groups in the receipt of cancer screenings. CONCLUSIONS: Racial/ethnic minorities who reported being socially-assigned as white are more likely to receive preventive vaccinations and less likely to report healthcare discrimination compared with those who are socially-assigned as minority. Socially-assigned race/ethnicity is emerging as an important area for further research in understanding how race/ethnicity influences health outcomes.

Macintosh T; Desai MM; Lewis TT; Jones BA; Nunez-Smith M

2013-01-01

282

RNA-PAIRS: RNA probabilistic assignment of imino resonance shifts  

Energy Technology Data Exchange (ETDEWEB)

The significant biological role of RNA has further highlighted the need for improving the accuracy, efficiency and the reach of methods for investigating RNA structure and function. Nuclear magnetic resonance (NMR) spectroscopy is vital to furthering the goals of RNA structural biology because of its distinctive capabilities. However, the dispersion pattern in the NMR spectra of RNA makes automated resonance assignment, a key step in NMR investigation of biomolecules, remarkably challenging. Herein we present RNA Probabilistic Assignment of Imino Resonance Shifts (RNA-PAIRS), a method for the automated assignment of RNA imino resonances with synchronized verification and correction of predicted secondary structure. RNA-PAIRS represents an advance in modeling the assignment paradigm because it seeds the probabilistic network for assignment with experimental NMR data, and predicted RNA secondary structure, simultaneously and from the start. Subsequently, RNA-PAIRS sets in motion a dynamic network that reverberates between predictions and experimental evidence in order to reconcile and rectify resonance assignments and secondary structure information. The procedure is halted when assignments and base-parings are deemed to be most consistent with observed crosspeaks. The current implementation of RNA-PAIRS uses an initial peak list derived from proton-nitrogen heteronuclear multiple quantum correlation ({sup 1}H-{sup 15}N 2D HMQC) and proton-proton nuclear Overhauser enhancement spectroscopy ({sup 1}H-{sup 1}H 2D NOESY) experiments. We have evaluated the performance of RNA-PAIRS by using it to analyze NMR datasets from 26 previously studied RNAs, including a 111-nucleotide complex. For moderately sized RNA molecules, and over a range of comparatively complex structural motifs, the average assignment accuracy exceeds 90%, while the average base pair prediction accuracy exceeded 93%. RNA-PAIRS yielded accurate assignments and base pairings consistent with imino resonances for a majority of the NMR resonances, even when the initial predictions are only modestly accurate. RNA-PAIRS is available as a public web-server at http://pine.nmrfam.wisc.edu/RNA/http://pine.nmrfam.wisc.edu/RNA/.

Bahrami, Arash; Clos, Lawrence J.; Markley, John L.; Butcher, Samuel E. [National Magnetic Resonance Facility at Madison (United States); Eghbalnia, Hamid R., E-mail: eghbalhd@uc.edu [University of Cincinnati, Department of Molecular and Cellular Physiology (United States)

2012-04-15

283

Approximation Algorithms for the Multiple Knapsack Problem with Assignment Restrictions  

UK PubMed Central (United Kingdom)

Motivated by a real world application, we study the multiple knapsack problem withassignment restrictions (MKAR): We are given a set of items N = f1; : : : ; ng and a setof knapsacks M = f1; : : : ; mg. Each item j 2 N has a positive real weight w j and eachknapsack i 2 M has a positive real capacity c i associated with it. In addition, for eachitem j 2 N a set A j ` M of knapsacks that can hold item j is specified. In a feasibleassignment of items to knapsacks, for each knapsack i 2 M , we need to choose a subsetS i of items in N to be assigned to knapsack i, such that (i) Each item is assigned to atmost one knapsack (ii) Assignment restrictions are satisfied and (iii) For each knapsack, itscapacity constraint is satisfied. We consider two objectives (i) Maximize assigned weightPi2MPj2S iw j and (ii) minimize utilized capacityPi:S i 6=;c iOur results include two13approximation algorithms and two12approximation algorithmsfor the single objective problem of maximizing assigned weight. For the bi-criteria problemwhich considers both the objectives, we present two algorithms with performance ratios(13 ; 2) and (12 ; 3) respectively.

M. Dawande; J. Kalagnanam; P. Keskinocak; R. Ravi; F. S. Salman

284

Comparing assignment algorithms for the Multi-Depot VRP  

UK PubMed Central (United Kingdom)

This paper considers the Multi-Depot Vehicle Routing Problem (MDVRP). Given the intrinsic difficulty of thisproblem class, approximation methods of the type "cluster first, route second" (two step approaches) seem to bepromising for practical size problems. The first step, clustering is usually solved by assignments algorithms. Thetotal cost of the solution for a MDVRP problem depends strongly on the assignment algorithm used in the first step,and these algorithms depend on the geographic topology of the instance of the problem to solve. We compare theresults obtained by six heuristic algorithms for the assignment of customers to depots, with assignments obtainedfrom solving the Transport Problem (TP). To compare the assignment algorithms we run the same routing heuristic,namely a modified version of the Clark and Wright heuristic [5], and compare the routing results for each one ofthem using STAAR [9] developed under the Arcview 3.0 Geographical Information System platform. In earlier work[10] we confirmed that the heuristics with best results were those with the largest computational efforts. We now findthat the solutions obtained solving the TP give good results for our test cases and are worth using in real-lifeproblems.

Libertad Tansini; Maria Urquhart; Omar Viera

285

32P and 2-dimensional NMR methodology for assignment of 31P and 2H signals of oligonucleotides  

International Nuclear Information System (INIS)

[en] Because of spectral overlap, even with 2-D methods, 1H signal assignments in oligonucleotides much longer than tetramers is exceedingly difficult. However, by chemically introducing site-specific 0-17, 0-18, and S labeling in the phosphoryl groups of oligonucleotides, it is now possible to unambiguously assign the 32P peaks. Thus, it is possible to assign all three phosphate 31P signals of the oligonucleotide tetramer d(ApGpCpT) by site-specific introduction of the three different oxygen isotopes into the three different phosphate diesters. Using two-dimensional 31P/1H correlated spectral methods the authors can also unambiguously identify the 1H NMR signals coupled to the assigned 31P signals. In the latter, only those protons which are scalar coupled to the 31P nucleus are observed in the 2-D heteronuclear spectrum. Finally by the 1H/1H COSY and 1H NOESY they can identify the other protons of the oligonucleotides. This new methodology is not dependent upon any assumed B-DNA structure as is required in other recent 2-D oligonucleotide assignment techniques. Assignment of signals in the actinomycin D intercalating d(ApGpCpT) tetramer complex, d(CGCAGAATTCGCG), and lac operator pseudo-fragment, d(TGTGAGCGCTCACA), are now possible

1986-01-01

286

Multicast routing and wavelength assignment in WDM networks: a bin packing approach  

Science.gov (United States)

We address the problem of multicast routing and wavelength assignment (MClowbarRWA) in wavelength-routed WDM optical networks. Multicast requests are facilitated in WDM networks by setting up so-called light trees and assigning wavelengths to them. Objectives of the MClowbarRWA problem include minimizing the number of distinct wavelengths used to establish a set of multicast requests and minimizing the cost of the corresponding light trees. This cost can represent the physical length, delay, or actual cost of a tree. Applications that require quality of service (QoS) multicasting can impose additional constraints on light trees, such as a bounded end-to-end delay. Proposed are heuristic algorithms based on bin packing methods for the general MClowbarRWA problem, which is NP complete. These algorithms can consider unicast, multicast, and broadcast requests with or without QoS demands. Computational tests indicate that these algorithms are efficient, particularly for dense networks.

Skorin-Kapov, Nina

2006-04-01

287

Complete sequence-specific sup 1 H NMR assignments for human insulin  

Energy Technology Data Exchange (ETDEWEB)

Solvent conditions where human insulin could be studied by high-resolution NMR were determined. Both low pH and addition of acetonitrile were required to overcome the protein's self-association and to obtain useful spectra. Two hundred eighty-six {sup 1}H resonances were located and assigned to specific sites on the protein by using two-dimensional NMR methods. The presence and position of numerous d{sub NN} sequential NOE's indicate that the insulin conformation seen in crystallographic studies is largely retained under these solution conditions. Slowly exchanging protons were observed for seven backbone amide protons and were assigned to positions A15 and A16 and to positions B15-B19. These amides all occur within helical regions of the protein.

Kline, A.D.; Justice, R.M. Jr. (Eli Lilly and Co., Indianapolis, IN (USA))

1990-03-27

288

Complete sequence-specific 1H NMR assignments for human insulin  

International Nuclear Information System (INIS)

Solvent conditions where human insulin could be studied by high-resolution NMR were determined. Both low pH and addition of acetonitrile were required to overcome the protein's self-association and to obtain useful spectra. Two hundred eighty-six 1H resonances were located and assigned to specific sites on the protein by using two-dimensional NMR methods. The presence and position of numerous dNN sequential NOE's indicate that the insulin conformation seen in crystallographic studies is largely retained under these solution conditions. Slowly exchanging protons were observed for seven backbone amide protons and were assigned to positions A15 and A16 and to positions B15-B19. These amides all occur within helical regions of the protein

1990-03-27

289

GPU-based SoftAssign for Maximizing Image Utilization in Photomosaics  

Directory of Open Access Journals (Sweden)

Full Text Available Photomosaic generation is a popular non-photorealistic rendering technique, where a single image is assembled from several smaller ones. Visual responses change depending on the proximity to the photomosaic, leading to many creative prospects for publicity and art. Synthesizing photomosaics typically requires very large image databases in order to produce pleasing results. Moreover, repetitions are allowed to occur which may locally bias the mosaic. This paper provides alternatives to prevent repetitions while still being robust enough to work with coarse image subsets. Three approaches were considered for the matching stage of photomosaics: a greedy-based procedural algorithm, simulated annealing and SoftAssign. It was found that the latter delivers adequate arrangements in cases where only a restricted number of images is available. This paper introduces a novel GPU-accelerated SoftAssign implementation that outperforms an optimized CPU implementation by a factor of 60 times in the tested hardware.

Marcos Slomp; Michihiro Mikamo; Bisser Raytchev; Toru Tamaki; Kazufumi Kaneda

2011-01-01

290

Software requirements  

CERN Multimedia

Without formal, verifiable software requirements-and an effective system for managing them-the programs that developers think they've agreed to build often will not be the same products their customers are expecting. In SOFTWARE REQUIREMENTS, Second Edition, requirements engineering authority Karl Wiegers amplifies the best practices presented in his original award-winning text?now a mainstay for anyone participating in the software development process. In this book, you'll discover effective techniques for managing the requirements engineering process all the way through the development cy

Wiegers, Karl E

2003-01-01

291

Reliability of retrospective assignment of gross motor function classification system scores.  

UK PubMed Central (United Kingdom)

OBJECTIVES: To assess "alternate forms" reliability and inter-rater reliability of Gross Motor Function Classification System (GMFCS) scores. METHODS: Fifty randomly selected children with cerebral palsy were divided into two groups: (1) GMFCS score assigned during gait assessment ("GMFCS previously assigned") and (2) no GMFCS score assigned. Using database information, two physiotherapists independently determined GMFCS scores for 25 children from the "previously assigned" group, and 25 from the "no score assigned" group. Therapists compared their recently assigned scores for the "previously assigned" group, discussing discrepancies until attaining agreement. This group's consensus scores were compared to GMFCS scores assigned at time of actual assessment to calculate "alternate forms" reliability. RESULTS: Between-therapist agreements were kappa?=?0.84 for "GMFCS previously assigned" group and 0.95 for "no GMFCS assigned" group. Kappa agreement between direct assessment and retrospectively assigned scores for the "GMFCS previously assigned" group was 0.79. CONCLUSIONS: Retrospective GMFCS scores can be reliably assigned.

Mayson TA; Ward V; Davies KR; Maurer J; Alvarez C; Beauchamp R; Black A

2013-06-01

292

Optimal assignment of incoming flights to baggage carousels at airports  

DEFF Research Database (Denmark)

The problem considered in this report is an assignment problem occurring at airports. This problem concerns the assignment of baggage carousels in baggage claim halls to arriving aircraft (baggage carousel assignment problem). This is a highly dynamic problem since disruptions frequently occur during operations. We introduce a basic static model that can be adapted to the layout of different airports. Afterwards we show how a decision support system based on a MIP-model can be designed in a dynamic real world environment. The system supports the decisions of the dispatcher during daily operations. Computational results for a real world problem at Frankfurt Airport are presented. At Frankfurt Airport the suggested solution method was successfully implemented and is running now for over half an year. The experiences show that the system increases the quality of the dispatching process and in general is a substantial support in decision making.

Barth, Torben C.

2013-01-01

293

Hiding Satisfying Assignments: Two are Better than One  

CERN Multimedia

The evaluation of incomplete satisfiability solvers depends critically on the availability of hard satisfiable instances. A plausible source of such instances consists of random k-SAT formulas whose clauses are chosen uniformly from among all clauses satisfying some randomly chosen truth assignment A. Unfortunately, instances generated in this manner tend to be relatively easy and can be solved efficiently by practical heuristics. Roughly speaking, as the formula's density increases, for a number of different algorithms, A acts as a stronger and stronger attractor. Motivated by recent results on the geometry of the space of satisfying truth assignments of random k-SAT and NAE-k-SAT formulas, we introduce a simple twist on this basic model, which appears to dramatically increase its hardness. Namely, in addition to forbidding the clauses violated by the hidden assignment A, we also forbid the clauses violated by its complement, so that both A and complement of A are satisfying. It appears that under this "symm...

Achlioptas, D; Moore, Cristopher; Achlioptas, Dimitris; Jia, Haixia; Moore, Cristopher

2005-01-01

294

Airport Gate Assignment A Hybrid Model and Implementation  

CERN Document Server

With the rapid development of airlines, airports today become much busier and more complicated than previous days. During airlines daily operations, assigning the available gates to the arriving aircrafts based on the fixed schedule is a very important issue, which motivates researchers to study and solve Airport Gate Assignment Problems (AGAP) with all kinds of state-of-the-art combinatorial optimization techniques. In this paper, we study the AGAP and propose a novel hybrid mathematical model based on the method of constraint programming and 0 - 1 mixed-integer programming. With the objective to minimize the number of gate conflicts of any two adjacent aircrafts assigned to the same gate, we build a mathematical model with logical constraints and the binary constraints. For practical considerations, the potential objective of the model is also to minimize the number of gates that airlines must lease or purchase in order to run their business smoothly. We implement the model in the Optimization Programming L...

Li, Chendong

2009-01-01

295

Stress assignment in reading Italian: Friendship outweighs dominance.  

UK PubMed Central (United Kingdom)

Stress assignment to polysyllabic words is the only aspect of the pronunciation of written Italian that cannot be predicted by rule. It could be a function of stress dominance in the language or of stress neighborhood (i.e., the number of words sharing an ending and a stress pattern). In two experiments, we investigated stress assignment in Italian adult and, most importantly, young readers. Word frequency and number of stress friends influenced reading times and accuracy, outweighing any effect of stress dominance. In the presence of a majority of stress friends, the reading of low-frequency words was only affected by stress neighborhood. These effects were the same in fourth graders and adult readers. We argue that distributional information based on the number of stress friends-rather than stress dominance-is the most effective factor in assigning stress to words in reading.

Burani C; Paizi D; Sulpizio S

2013-10-01

296

Simulation Optimization of the Crossdock Door Assignment Problem  

CERN Multimedia

The purpose of this report is to present the Crossdock Door Assignment Problem, which involves assigning destinations to outbound dock doors of Crossdock centres such that travel distance by material handling equipment is minimized. We propose a two fold solution; simulation and optimization of the simulation model simulation optimization. The novel aspect of our solution approach is that we intend to use simulation to derive a more realistic objective function and use Memetic algorithms to find an optimal solution. The main advantage of using Memetic algorithms is that it combines a local search with Genetic Algorithms. The Crossdock Door Assignment Problem is a new domain application to Memetic Algorithms and it is yet unknown how it will perform.

Aickelin, Uwe

2008-01-01

297

A new probabilistic transformation of belief mass assignment  

CERN Document Server

In this paper, we propose in Dezert-Smarandache Theory (DSmT) framework, a new probabilistic transformation, called DSmP, in order to build a subjective probability measure from any basic belief assignment defined on any model of the frame of discernment. Several examples are given to show how the DSmP transformation works and we compare it to main existing transformations proposed in the literature so far. We show the advantages of DSmP over classical transformations in term of Probabilistic Information Content (PIC). The direct extension of this transformation for dealing with qualitative belief assignments is also presented.

Dezert, Jean

2008-01-01

298

Job Assignments under Moral Hazard : The Peter Principle Revisited  

DEFF Research Database (Denmark)

Inefficient job assignments are usually explained with incomplete information about employees' abilities or contractual imperfections. We show that inefficient assignments arise even without uncertainty about the employee's ability and with complete contracts. Building on this result we provide a new perspective on the Peter Principle, by incorporating the possibility that an employee works harder. Hence, earnings and output may increase with a promotion only because employees work harder, some doing so to compensate for lacking talent. As a result, promotions are desirable for most employees but may make the least able in a hierarchy level less well off.

Koch, Alexander; Nafziger, Julia

2008-01-01

299

The Effect of Output Requirement on the Acquisition of Grammatical Collocations by Iranian EFL Learners  

Directory of Open Access Journals (Sweden)

Full Text Available The present study investigated: (a) the effect of output requirement on the acquisition of grammatical collocations; and (b) the relative efficacy of output tasks in comparison with that of input enhancement with regard to the acquisition of grammatical collocations. Ninety homogenous adult Iranian intermediate EFL learners were randomly assigned to two experimental (EG1/EG2) and a control group (CG). A pre-test was given to the three groups to measure the students’ knowledge of collocations prior to any treatment. The students in EG1 were required to do certain output tasks dealing with the collocations in focus after reading a passage whereas for those in EG2 the same target forms were visually enhanced. The students in the CG received neither visually enhanced input, nor output tasks and they were asked to simply read the passage, and answer some questions about it. After the treatment phase, a post-test was administered to measure the gains. The results indicated that both output and input enhancement exert a significant effect on the acquisition of grammatical collocations by the learners. It was also found that input enhancement group outperformed the output group; however; the observed difference was not statistically significant. Accordingly, it can be claimed that an implicit and unobtrusive method such as input enhancement can be as effective as an output task which requires actual production of language on the part of L2 learners.

Ehsan Rezvani

2011-01-01

300

Spin-parity assignments in high-spin studies  

International Nuclear Information System (INIS)

[en] Generally for the states populated in high-spin reactions, spins increase with increasing excitation energy. This is the result of the fact that these reactions tend to populate yrast or near yrast states. Angular distributions of gamma rays are presented for different stretched quadrupole and dipole as a gating transition. Parity assignment is discussed

2001-01-01

 
 
 
 
301

Exploiting Flexibly Assignable Work to Improve Load Balance  

Energy Technology Data Exchange (ETDEWEB)

In many applications of parallel computing, distribution of the data unambiguously implies distribution of work among processors. But there are exceptions where some tasks can be assigned to one of several processors without altering the total volume of communication. In this paper, we study the problem of exploiting this flexibility in assignment of tasks to improve load balance. We first model the problem in terms of network flow and use combinatorial techniques for its solution. Our parametric search algorithms use maximum flow algorithms for probing on a candidate optimal solution value. We describe two algorithms to solve the assignment problem with log W{sub T} and |P| probe calls, where W{sub T} and |P|, respectively, denote the total workload and number of processors. We also define augmenting paths and cuts for this problem, and show that any algorithm based on augmenting paths can be used to find an optimal solution for the task assignment problem. We then consider a continuous version of the problem, and formulate it as a linearly constrained optimization problem, i.e., min ||Ax||{sub {infinity}}, s.t. Bx = d. To avoid solving an intractable {infinity}-norm optimization problem, we show that in this case minimizing the 2-norm is sufficient to minimize the {infinity}-norm, which reduces the problem to the well-studied linearly-constrained least squares problem. The continuous version of the problem has the advantage of being easily amenable to parallelization.

Pinar, Ali; Hendrickson, Bruce

2002-12-09

302

Augmenting superpopulation capture-recapture models with population assignment data.  

UK PubMed Central (United Kingdom)

Ecologists applying capture-recapture models to animal populations sometimes have access to additional information about individuals' populations of origin (e.g., information about genetics, stable isotopes, etc.). Tests that assign an individual's genotype to its most likely source population are increasingly used. Here we show how to augment a superpopulation capture-recapture model with such information. We consider a single superpopulation model without age structure, and split each entry probability into separate components due to births in situ and immigration. We show that it is possible to estimate these two probabilities separately. We first consider the case of perfect information about population of origin, where we can distinguish individuals born in situ from immigrants with certainty. Then we consider the more realistic case of imperfect information, where we use genetic or other information to assign probabilities to each individual's origin as in situ or outside the population. We use a resampling approach to impute the true population of origin from imperfect assignment information. The integration of data on population of origin with capture-recapture data allows us to determine the contributions of immigration and in situ reproduction to the growth of the population, an issue of importance to ecologists. We illustrate our new models with capture-recapture and genetic assignment data from a population of banner-tailed kangaroo rats?Dipodomys spectabilis?in Arizona.

Wen Z; Pollock K; Nichols J; Waser P

2011-09-01

303

Active vibration isolation via simultaneous left–right eigenvector assignment  

International Nuclear Information System (INIS)

[en] The objective of this research is to synthesize a simultaneous left and right eigenvector assignment (SLREA) method for active vibration isolation. It is a pioneering effort to utilize such an eigenvector assignment concept for active isolator design, where the approach can provide good physical insight into the problem. In this investigation, a new algorithm for the synthesis of the desired left eigenvectors is developed, which is an improvement over the classical methods. The purpose of the right eigenvector assignment method is to alter the closed-loop system modes such that the modal components corresponding to the concerned region (isolation area of the isolator) have relatively small vibration amplitude. Correspondingly, the design goal of the left eigenvector assignment is to alter the left eigenvectors of the closed-loop system so that they are as closely orthogonal to the system's forcing vectors as possible. With the proposed approach, one can achieve both disturbance rejection and modal confinement concurrently for the purpose of vibration isolation. In this research, a new formulation is developed so that the desired left eigenvectors of this integrated system are selected through solving a generalized eigenvalue problem, where the orthogonality indices between the forcing vectors and the left eigenvectors are minimized. The components of the right eigenvectors corresponding to the concerned region are minimized concurrently. It is shown that, with the SLREA technique, both disturbance rejection and modal confinement can be achieved, and thus vibration amplitude in the isolated region can be suppressed significantly

2008-01-01

304

On parametric stability margin maximization using state feedback pole assignment  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In this paper, the maximization of the parametric stability margin of state-space uncertain systems under the constraints of pole assignment is investigated. The class of systems considered is where the uncertainty may be modelled as the, possibly nonlinear, variation of a parameter appearing in the...

Hu, TS; Lam, J

305

ASSIGNMENT OF RAINBOW TROUT LINKAGE GROUPS TO SPECIFIC CHROMOSOMES  

Science.gov (United States)

The rainbow trout genetic linkage groups have been assigned to specific chromosomes in the OSU (2N=60) strain using fluorescence in situ hybridization (FISH) with BAC probes containing genes mapped to each linkage group. There was a rough correlation between chromosome size and size of the genetic l...

306

Asymmetric synthesis of (+)-geranyllinaloisocyanide: assignment of absolute stereochemistry.  

UK PubMed Central (United Kingdom)

The first nonracemic synthesis of (+)-geranyllinaloisocyanide, starting with (-)-lactic acid methyl ester, has been accomplished by exploiting a [3.3] sigmatropic rearrangement of allyl cyanate. The synthesis enables assignment of the S configuration of the C(3) isocyano substituted, quaternary stereogenic center in natural geranyllinaloisocyanide.

Ichikawa Y; Matsuda Y; Okumura K; Nakamura M; Masuda T; Kotsuki H; Nakano K

2011-05-01

307

TRASA: TRaffic Aware Slot Assignment Algorithm in Wireless Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In data gathering applications which is a typical application paradigm in wireless sensor networks, sensor nodes may have different traffic demands. Assigning equal channel access to each node may lead to congestion, inefficient use of the bandwidth and decrease of the application performance. In th...

Amdouni, Ichrak; Minet, Pascale

308

Tabu Search Metaheuristic for the Air Refueling Tanker Assignment Problem.  

Science.gov (United States)

In a joint effort between Air Mobility Command (AMC) and the Air Force Institute of Technology, we present a Tanker Assignment Problem (TAP) Tool capable of providing tanker mission plans for deployment scenarios. Due to the complex nature of extracting a...

S. R. Capehart

2000-01-01

309

Examination of a Formula Method for Assigning Letter Grades.  

Science.gov (United States)

Demonstrates that a current method of assigning letter grades is limited by choice of the high raw score as the parameter used to typify the raw score distribution. Provides an alternative procedure involving standard scores, transformed standard scores, and grade or ability-adjusted grade distribution models. (JN)

Thomas, Charles R.

1984-01-01

310

Assessing sex assignment concordance with genotype and phenotype.  

UK PubMed Central (United Kingdom)

OBJECTIVES: To catalogue patients with DSD and to assess the concordance of genotype and phenotype with sex assignment at birth compared to sex assignment before and following assessment by a Gender Medicine Team (GMT) at one institution, as an initial step in formulating standardized guidelines for management of these conditions. DESIGN: After obtaining IRB approval, a retrospective chart review was conducted patients seen in the Gender Medicine Clinic (GMC) between 2006-2009 at Texas Children's Hospital (TCH), Houston, Texas. McNemar's test and Kappa agreement provided associations of various factors with sex assignment at birth prior to GMT assessment and after GMT assessment. PARTICIPANTS: Forty-seven patients seen in the GMC with confirmed DSD. RESULTS: Forty-seven patients met the inclusion criteria. The mean age of the patients at the time of GMT evaluation was 9.1+/-6.1 years; 61.7% had male karyotype, and 38.3% had female karyotype; 51.1% had a male external phenotype, 42.6% had a female external phenotype, and 6.4% had phenotypic ambiguity. Sex assignment was concordant with genotype and phenotype in 63.8% and 86.4%, respectively of cases at the time of birth and in 76.6% and 97.7%, respectively, of cases after assessment by GMT. CONCLUSION: Long-term outcomes are needed to establish standardized practice guidelines for decision-making.

Suresh D; Crawford J; Axelrad ME; Gunn SK; McCullough L; Smith OB; Sutton VR; Roth D; Karaviti LP; Dietrich JE

2013-01-01

311

Helping Students Test Programs That Have Graphical User Interfaces  

Directory of Open Access Journals (Sweden)

Full Text Available Within computer science education, many educators are incorporating software testing activities into regular programming assignments. Tools like JUnit and its relatives make software testing tasks much easier, bringing them into the realm of even introductory students. At the same time, many introductory programming courses are now including graphical interfaces as part of student assignments to improve student interest and engagement. Unfortunately, writing software tests for programs that have significant graphical user interfaces is beyond the skills of typical students (and many educators). This paper presents initial work at combining educationally oriented and open-source tools to create an infrastructure for writing tests for Java programs that have graphical user interfaces. Critically, these tools are intended to be appropriate for introductory (CS1/CS2) student use, and to dovetail with current teaching approaches that incorporate software testing in programming assignments. We also include in our findings our proposed approach to evaluating our techniques.

Matthew Thornton; Stephen H. Edwards; Roy Patrick Tan

2008-01-01

312

FPGA-Based Laboratory Assignments for NoC-Based Manycore Systems  

Science.gov (United States)

Manycore systems have emerged as being one of the dominant architectural trends in next-generation computer systems. These highly parallel systems are expected to be interconnected via packet-based networks-on-chip (NoC). The complexity of such systems poses novel and exciting challenges in academia, as teaching their design requires the students

Ttofis, C.; Theocharides, T.; Michael, M. K.

2012-01-01

313

Introducing blended learning: An experience of uncertainty for students in the United Arab Emirates  

Directory of Open Access Journals (Sweden)

Full Text Available The cultural dimension of Uncertainty Avoidance is analysed in this study of an introduction to blended learning for international students. Content analysis was conducted on the survey narratives collected from three cohorts of management undergraduates in the United Arab Emirates. Interpretation of certainty with blended learning was found in: student skills with technology; student acknowledgement of course organisation; and student appreciation of online feedback. Uncertainty with the introduction of blended learning was found: when membership was assigned for group work, higher quality research methods were introduced; where course structure lacked detail, increased time was required for new and different online activities. These international students, from countries with a high score on Uncertainty Avoidance, exhibited that dimension when introduced to blended learning. The implications of these findings are discussed, and strategies suggested for introducing blended learning to international students. The limitations of the study are considered, and a direction for future research is suggested. This is the first study on undergraduates in the Middle East for the effects of a cultural dimension when introducing blended learning. The findings increase the body of knowledge that relates to learning technology in the international business classroom.

Linzi J. Kemp

2013-01-01

314

Balance Calibration – A Method for Assigning a Direct-Reading Uncertainty to an Electronic Balance.  

Energy Technology Data Exchange (ETDEWEB)

Paper Title: Balance Calibration – A method for assigning a direct-reading uncertainty to an electronic balance. Intended Audience: Those who calibrate or use electronic balances. Abstract: As a calibration facility, we provide on-site (at the customer’s location) calibrations of electronic balances for customers within our company. In our experience, most of our customers are not using their balance as a comparator, but simply putting an unknown quantity on the balance and reading the displayed mass value. Manufacturer’s specifications for balances typically include specifications such as readability, repeatability, linearity, and sensitivity temperature drift, but what does this all mean when the balance user simply reads the displayed mass value and accepts the reading as the true value? This paper discusses a method for assigning a direct-reading uncertainty to a balance based upon the observed calibration data and the environment where the balance is being used. The method requires input from the customer regarding the environment where the balance is used and encourages discussion with the customer regarding sources of uncertainty and possible means for improvement; the calibration process becomes an educational opportunity for the balance user as well as calibration personnel. This paper will cover the uncertainty analysis applied to the calibration weights used for the field calibration of balances; the uncertainty is calculated over the range of environmental conditions typically encountered in the field and the resulting range of air density. The temperature stability in the area of the balance is discussed with the customer and the temperature range over which the balance calibration is valid is decided upon; the decision is based upon the uncertainty needs of the customer and the desired rigor in monitoring by the customer. Once the environmental limitations are decided, the calibration is performed and the measurement data is entered into a custom spreadsheet. The spreadsheet uses measurement results, along with the manufacturer’s specifications, to assign a direct-read measurement uncertainty to the balance. The fact that the assigned uncertainty is a best-case uncertainty is discussed with the customer; the assigned uncertainty contains no allowance for contributions associated with the unknown weighing sample, such as density, static charges, magnetism, etc. The attendee will learn uncertainty considerations associated with balance calibrations along with one method for assigning an uncertainty to a balance used for non-comparison measurements.

Mike Stears

2010-07-01

315

A study of terminology auditors' performance for UMLS semantic type assignments.  

UK PubMed Central (United Kingdom)

Auditing healthcare terminologies for errors requires human experts. In this paper, we present a study of the performance of auditors looking for errors in the semantic type assignments of complex UMLS concepts. In this study, concepts are considered complex whenever they are assigned combinations of semantic types. Past research has shown that complex concepts have a higher likelihood of errors. The results of this study indicate that individual auditors are not reliable when auditing such concepts and their performance is low, according to various metrics. These results confirm the outcomes of an earlier pilot study. They imply that to achieve an acceptable level of reliability and performance, when auditing such concepts of the UMLS, several auditors need to be assigned the same task. A mechanism is then needed to combine the possibly differing opinions of the different auditors into a final determination. In the current study, in contrast to our previous work, we used a majority mechanism for this purpose. For a sample of 232 complex UMLS concepts, the majority opinion was found reliable and its performance for accuracy, recall, precision and the F-measure was found statistically significantly higher than the average performance of individual auditors.

Gu HH; Elhanan G; Perl Y; Hripcsak G; Cimino JJ; Xu J; Chen Y; Geller J; Paul Morrey C

2012-12-01

316

Improved pulse sequences for sequence specific assignment of aromatic proton resonances in proteins.  

UK PubMed Central (United Kingdom)

Aromatic proton resonances of proteins are notoriously difficult to assign. Through-bond correlation experiments are preferable over experiments that rely on through-space interactions because they permit aromatic chemical shift assignments to be established independently of the structure determination process. Known experimental schemes involving a magnetization transfer across the Cbeta-Cgamma bond in aromatic side chains either suffer from low efficiency for the relay beyond the Cdelta position, use sophisticated 13C mixing schemes, require probe heads suitable for application of high 13C radio-frequency fields or rely on specialized isotopic labelling patterns. Novel methods are proposed that result in sequential assignment of all aromatic protons in uniformly 13C/15N labelled proteins using standard spectrometer hardware. Pulse sequences consist of routinely used building blocks and are therefore reasonably simple to implement. Ring protons may be correlated with beta-carbons and, alternatively, with amide protons (and nitrogens) or carbonyls in order to take advantage of the superior dispersion of backbone resonances. It is possible to record spectra in a non-selective manner, yielding signals of all aromatic residues, or as amino-acid type selective versions to further reduce ambiguities. The new experiments are demonstrated with four different proteins with molecular weights ranging from 11 kDa to 23 kDa. Their performance is compared with that of (Hbeta)Cbeta(CgammaCdelta)Hdelta and (Hbeta)Cbeta(CgammaCdeltaCepsilon)Hepsilon pulse sequences.

Löhr F; Hänsel R; Rogov VV; Dötsch V

2007-03-01

317

A Divide-and-Conquer Scheme for Assigning Roles in Multi-Channel Wireless Mesh Networks  

CERN Multimedia

A multi-channel MAC seems to be an interesting approach for improving network throughput by multiplexing transmissions over orthogonal channels. In particular, Molecular MAC has recently proposed to modify the standard IEEE 802.11 DCF access method to use dynamic channel switching for efficient packet forwarding over multiple hops. However, this MAC layer requires role and channel assignment to nodes: some of them use a static channel, while others dynamically switch to neighbor channels on-demand. To assign roles and channels, we extend the notion of the Weakly Connected Dominating Set, the structure already used in clustering. More precisely, we adapt the WCDS structure and introduce new constraints to define what we call a reversible WCDS (r-WCDS), which is particularly suitable for wireless mesh networks operating under Molecular MAC. We propose a divide-and-conquer scheme that partitions the network into clusters with one leader per cluster solving a MILP formulation to assign roles in its cluster. By ap...

Darties, Benoit; Duda, Andrzej

2009-01-01

318

A Peer-Reviewed Research Assignment for Large Classes.  

Science.gov (United States)

Introduces a writing exercise students work on in collaborative groups. Aims to enhance students' scientific research paper writing skills and provide experience working in collaborative groups. Presents evaluation criteria for peer-group evaluation of a poster presentation, intra-group evaluation of peer performance, and peer-group evaluation of…

Henderson, LaRhee; Buising, Charisse

2000-01-01

319

Critical Task Re-assignment under Hybrid Scheduling Approach in Multiprocessor Real-Time Systems  

CERN Multimedia

Embedded hard real time systems require substantial amount of emergency processing power for the management of large scale systems like a nuclear power plant under the threat of an earth quake or a future transport systems under a peril. In order to meet a fully coordinated supervisory control of multiple domains of a large scale system, it requires the scenario of engaging multiprocessor real time design. There are various types of scheduling schemes existing for meeting the critical task assignment in multiple processor environments and it requires the tracking of faulty conditions of the subsystem to avoid system underperformance from failure patterns. Hybrid scheduling usually engages a combined scheduling philosophy comprising of a static scheduling of a set of tasks and a highly pre-emptive scheduling for another set of tasks in different situations of process control. There are instances where highly critical tasks need to be introduced at a least expected catastrophe and it cannot be ensured to meet a...

Nair, Gopalakrishnan T R

2012-01-01

320

An expectation/maximization nuclear vector replacement algorithm for automated NMR resonance assignments  

International Nuclear Information System (INIS)

We report an automated procedure for high-throughput NMR resonance assignment for a protein of known structure, or of an homologous structure. Our algorithm performs Nuclear Vector Replacement (NVR) by Expectation/Maximization (EM) to compute assignments. NVR correlates experimentally-measured NH residual dipolar couplings (RDCs) and chemical shifts to a given a priori whole-protein 3D structural model. The algorithm requires only uniform 15N-labelling of the protein, and processes unassigned HN-15N HSQC spectra, HN-15N RDCs, and sparse HN-HN NOE's (dNNs). NVR runs in minutes and efficiently assigns the (HN,15N) backbone resonances as well as the sparse dNNs from the 3D 15N-NOESY spectrum, in O(n3) time. The algorithm is demonstrated on NMR data from a 76-residue protein, human ubiquitin, matched to four structures, including one mutant (homolog), determined either by X-ray crystallography or by different NMR experiments (without RDCs). NVR achieves an average assignment accuracy of over 99%. We further demonstrate the feasibility of our algorithm for different and larger proteins, using different combinations of real and simulated NMR data for hen lysozyme (129 residues) and streptococcal protein G (56 residues), matched to a variety of 3D structural models. Abbreviations: NMR, nuclear magnetic resonance; NVR, nuclear vector replacement; RDC, residual dipolar coupling; 3D, three-dimensional; HSQC, heteronuclear single-quantum coherence; HN, amide proton; NOE, nuclear Overhauser effect; NOESY, nuclear Overhauser effect spectroscopy; dNN, nuclear Overhauser effect between two amide protons; MR, molecular replacement; SAR, structure activity relation; DOF, degrees of freedom; nt., nucleotides; SPG, Streptococcal protein G; SO(3), special orthogonal (rotation) group in 3D; EM, Expectation/Maximization; SVD, singular value decomposition

2004-01-01

 
 
 
 
321

A set of BEST triple-resonance experiments for time-optimized protein resonance assignment  

Science.gov (United States)

A series of sequential, intra-residue, and bi-directional BEST H N CA, H N CO, and H N CB pulse sequences is presented that extends the BEST concept introduced recently for fast multidimensional protein NMR [Schanda et al., J. Am. Chem. Soc. 128 (2006) 9042] to the complete set of experiments required for sequential resonance assignment. We demonstrate for the protein ubiquitin that 3D BEST H N C correlation spectra can be recorded on a 600 MHz NMR spectrometer equipped with a cryogenic probe in only a few minutes of acquisition time with sufficient sensitivity to detect all expected cross peaks.

Lescop, Ewen; Schanda, Paul; Brutscher, Bernhard

2007-07-01

322

A set of BEST triple-resonance experiments for time-optimized protein resonance assignment.  

UK PubMed Central (United Kingdom)

A series of sequential, intra-residue, and bi-directional BEST H-N-CA, H-N-CO, and H-N-CB pulse sequences is presented that extends the BEST concept introduced recently for fast multidimensional protein NMR [Schanda et al., J. Am. Chem. Soc. 128 (2006) 9042] to the complete set of experiments required for sequential resonance assignment. We demonstrate for the protein ubiquitin that 3D BEST H-N-C correlation spectra can be recorded on a 600MHz NMR spectrometer equipped with a cryogenic probe in only a few minutes of acquisition time with sufficient sensitivity to detect all expected cross peaks.

Lescop E; Schanda P; Brutscher B

2007-07-01

323

Making students engineers  

Directory of Open Access Journals (Sweden)

Full Text Available Curtin University of Technology’s Engineering faculty addresses its students as ‘student engineers’. There is a subtle but important distinction between an engineering student and a student engineer. It is a challenge to have our students make that distinction and to engage with the processes of professional engineering practice.This paper reports on an innovative first year ‘Engineering Foundations: Principles and Communications (EFPC)’ unit that embeds the acquisition of communication skills in a technically based project. The project revolves around two engineering constructs: a popsicle stick bridge and a mousetrap-powered car. The design and construction of each construct is conducted by different teams of students – each team designs a bridge and constructs a car, or vice versa. Each team follows recognised procedures of process and communication for the design, tendering and production of the projects.Requiring students to work both as designers and constructors introduces them to the different communication requirements of each role. More powerfully, they also assume the role of client for each others’ engineering project, providing a valuable alternative perspective. Within this technical context the unit also teaches students to write engineering case study reports, give professional presentations on their project and work in teams. These are all principal skills that are essential in the real engineering world.The project has led to significant improvements in students’ communication skills, as well as their perceived learning outcomes. It has introduced students to essential lifelong learning skills and has challenged them to become effective communicators, better team players and more professional in their approach to engineering projects.

Euan Lindsay; Roger Munt; Helen Rogers; David Scott; Karen Sullivan

2008-01-01

324

Empirical Equation Based Chirality (n, m) Assignment of Semiconducting Single Wall Carbon Nanotubes from Resonant Raman Scattering Data  

Directory of Open Access Journals (Sweden)

Full Text Available This work presents a technique for the chirality (n, m) assignment of semiconducting single wall carbon nanotubes by solving a set of empirical equations of the tight binding model parameters. The empirical equations of the nearest neighbor hopping parameters, relating the term (2n, m) with the first and second optical transition energies of the semiconducting single wall carbon nanotubes, are also proposed. They provide almost the same level of accuracy for lower and higher diameter nanotubes. An algorithm is presented to determine the chiral index (n, m) of any unknown semiconducting tube by solving these empirical equations using values of radial breathing mode frequency and the first or second optical transition energy from resonant Raman spectroscopy. In this paper, the chirality of 55 semiconducting nanotubes is assigned using the first and second optical transition energies. Unlike the existing methods of chirality assignment, this technique does not require graphical comparison or pattern recognition between existing experimental and theoretical Kataura plot.

Md Shamsul Arefin

2012-01-01

325

Effects of contact with treatment users on mental illness stigma: evidence from university roommate assignments.  

Science.gov (United States)

Mental illness stigma refers to negative stereotypes and prejudices about people with mental illness, and is a widespread phenomenon with damaging social, psychological, and economic consequences. Despite considerable policy attention, mental illness stigma does not appear to have declined significantly in recent years. Interpersonal contact with persons with mental illness has been identified as a promising approach to reducing mental illness stigma. This study investigates the effect of contact with mental health treatment users on stigma using an observational research design that is free of self-selection bias. The research design is based on the quasi-experiment in which university students are assigned to live together as roommates. Survey data were collected from first-year undergraduates at two large universities in the United States (N = 1605). Multivariable regressions were used to estimate the effect of assignment to a roommate with a history of mental health treatment on a brief measure of stigmatizing attitudes. Contact with a treatment user caused a modest increase in stigma (standardized effect size = 0.15, p = 0.03). This effect was present among students without a prior treatment history of their own, but not among those with a prior history. The findings indicate that naturalistic contact alone does not necessarily yield a reduction in mental illness stigma. This may help explain why stigma has not declined in societies such as the United States even as treatment use has risen substantially. The findings also highlight the importance of isolating the specific components, beyond contact per se, that are necessary to reduce stigma in contact-based interventions. PMID:22703886

Eisenberg, Daniel; Downs, Marilyn F; Golberstein, Ezra

2012-06-01

326

Effects of contact with treatment users on mental illness stigma: evidence from university roommate assignments.  

UK PubMed Central (United Kingdom)

Mental illness stigma refers to negative stereotypes and prejudices about people with mental illness, and is a widespread phenomenon with damaging social, psychological, and economic consequences. Despite considerable policy attention, mental illness stigma does not appear to have declined significantly in recent years. Interpersonal contact with persons with mental illness has been identified as a promising approach to reducing mental illness stigma. This study investigates the effect of contact with mental health treatment users on stigma using an observational research design that is free of self-selection bias. The research design is based on the quasi-experiment in which university students are assigned to live together as roommates. Survey data were collected from first-year undergraduates at two large universities in the United States (N = 1605). Multivariable regressions were used to estimate the effect of assignment to a roommate with a history of mental health treatment on a brief measure of stigmatizing attitudes. Contact with a treatment user caused a modest increase in stigma (standardized effect size = 0.15, p = 0.03). This effect was present among students without a prior treatment history of their own, but not among those with a prior history. The findings indicate that naturalistic contact alone does not necessarily yield a reduction in mental illness stigma. This may help explain why stigma has not declined in societies such as the United States even as treatment use has risen substantially. The findings also highlight the importance of isolating the specific components, beyond contact per se, that are necessary to reduce stigma in contact-based interventions.

Eisenberg D; Downs MF; Golberstein E

2012-09-01

327

Closure requirements  

International Nuclear Information System (INIS)

Closure of a waste management unit can be either permanent or temporary. Permanent closure may be due to: economic factors which make it uneconomical to mine the remaining minerals; depletion of mineral resources; physical site constraints that preclude further mining and beneficiation; environmental, regulatory or other requirements that make it uneconomical to continue to develop the resources. Temporary closure can occur for a period of several months to several years, and may be caused by factors such as: periods of high rainfall or snowfall which prevent mining and waste disposal; economic circumstances which temporarily make it uneconomical to mine the target mineral; labor problems requiring a cessation of operations for a period of time; construction activities that are required to upgrade project components such as the process facilities and waste management units; and mine or process plant failures that require extensive repairs. Permanent closure of a mine waste management unit involves the provision of durable surface containment features to protect the waters of the State in the long-term. Temporary closure may involve activities that range from ongoing maintenance of the existing facilities to the installation of several permanent closure features in order to reduce ongoing maintenance. This paper deals with the permanent closure features.

1992-01-01

328

The effect of online quizzes on student achievement in high school chemistry  

Science.gov (United States)

The idea of student engagement has come to the forefront of the United States educational system over the past decade. Student engagement requires learners to be actively involved in all stages of the learning process. This study focuses on the use of online quizzes in the chemistry classroom as a means to help students become more engaged in their learning outside of the classroom. Students were given three different types of online quizzes over the course of a chemistry chapter. Student scores on end of the chapter examinations was used to determine whether there was a significant difference in the amount of learning that occurred when a student took each of the three types of online quizzes. Students in a private parochial high school chemistry class completed online quizzes over the course of a semester. The quizzes were taken after completing assigned readings from the chemistry text. After each reading, a third of the students took online multiple-choice quizzes, a third took a paragraph quiz, and a third took no quiz. Scores received from end of chapter tests were evaluated to determine if the impact each of the quiz types had on the learning. All statistical analysis was done using SPSS using two-way split plot ANOVA with condition (paragraph, multiple-choice, nothing) as the within subject factor and group (A, B, C) as between subject factor. The data indicates that there was no significance within the condition F (1.877, 90.087) =.996, p>.05, or the interaction results. F (3.754, 90.087) =.509, p>.05. The data indicated that the effect of group was not significant either. F (2, 48) =.981, p>.05. Interviews undertaken to explain this outcome discovered that students did not become engaged with the content until the night before each test. When they did so, they used a teacher-provided study guide as their primary learning tool.

Deeter, Christopher L.

329

Conducting interviews with failing students.  

UK PubMed Central (United Kingdom)

Pre-registration students are bound by the Nursing and Midwifery Council's code of conduct, and must meet the expectations for performance laid out in the NMC's standards for competence. When a student is not achieving the relevant competencies and is regarded as at risk of failing a clinical placement, it is paramount that the mentor acts promptly, bringing forward interim interviews where appropriate. Good interview technique will help mentors and students to address difficulties in placements. Mentors should receive adequate support to address problems during the remainder of the student's placement or, if a student does not reach the required level of competency or professional behaviour, ensure that they do not pass.

Stevens E

2013-02-01

330

Ionospheric HF radio propagation in problems and computer assignments  

CERN Multimedia

The book's purpose is to introduce the HF ionospheric radio-propagation, through the solution of problems and computer assignments. The problems and computer assignments are used primarily as a check and deepening of the theoretical part, which however is essential. Secondly, they are used to introduce the reader to new subjects in a natural way. The text proposes the main objective of bringing the reader which has a background similar to a master degree in physics or engineering, to an operative level in the field of ionospheric radio-propagation. The material covers the fundamentals of plasma physics, the Appleton-Hartree equation, its interpretation and discussion, and group refractive indices. The applications presented include ionograms simulation, ray tracing, and ionospheric absorption.

Scotto, Carlo

2013-01-01

331

Vehicle Suspension System Control Based on Pole Assignment Optimization  

Directory of Open Access Journals (Sweden)

Full Text Available The vibration control design of the vehicle active suspension system is studied. The controller of the suspension system is designed optimally based on the optimal pole assignment method. This paper will elaborate the suspension system on the following four aspects. Firstly, the effect of the road roughness disturbance on the smoothness of the vehicle is analyzed based on the linear model of the vehicle active suspension system. Then the optimal pole assignment method is proposed and the optimal controller is obtained by optimizing the poles of the system. The simulation results show that the input in size with the optimal controller is small. The control type besides the hydraulic equipment can be used as the actuator. Additionally, the optimal controller reduces the vibration caused by the road disturbance, which is difficult for the traditional PID controller. Finally, the proposed method has well practical property for improving the smoothness of the system by the simulation results.

Zhi Qu; Guojun Cui

2013-01-01

332

The use of meta-heuristics for airport gate assignment  

DEFF Research Database (Denmark)

Improper assignment of gates may result in flight delays, inefficient use of the resource, customer’s dissatisfaction. A typical metropolitan airport handles hundreds of flights a day. Solving the gate assignment problem (GAP) to optimality is often impractical. Meta-heuristics have recently been proposed to generate good solutions within a reasonable timeframe. In this work, we attempt to assess the performance of three meta-heuristics, namely, genetic algorithm (GA), tabu search (TS), simulated annealing (SA) and a hybrid approach based on SA and TS. Flight data from Incheon International Airport are collected to carry out the computational comparison. Although the literature has documented these algorithms, this work may be a first attempt to evaluate their performance using a set of realistic flight data.

Cheng, Chun-Hung; Ho, Sin C.

2012-01-01

333

Confirmed assignments of isomeric dimethylbenzyl radicals generated by corona discharge.  

UK PubMed Central (United Kingdom)

The controversial vibronic assignments of isomeric dimethylbenzyl radicals were clearly resolved by using different precursors. By employing corresponding dimethylbenzyl chlorides as precursors, we identified the origins of the vibronic bands of the dimethylbenzyl radicals generated by corona discharge of 1,2,4-trimethylbenzene. From the analysis of the spectra observed from the dimethylbenzyl chlorides in a corona excited supersonic expansion, we revised previous assignments of the 3,4-, 2,4-, and 2,5-dimethylbenzyl radicals. Spectroscopic data of electronic transition and vibrational mode frequencies in the ground electronic state of each isomer were accurately determined by comparing them with those obtained by an ab initio calculation and with the known vibrational data of 1,2,4-trimethylbenzene.

Yoon YW; Lee SK

2011-12-01

334

Confirmed assignments of isomeric dimethylbenzyl radicals generated by corona discharge.  

Science.gov (United States)

The controversial vibronic assignments of isomeric dimethylbenzyl radicals were clearly resolved by using different precursors. By employing corresponding dimethylbenzyl chlorides as precursors, we identified the origins of the vibronic bands of the dimethylbenzyl radicals generated by corona discharge of 1,2,4-trimethylbenzene. From the analysis of the spectra observed from the dimethylbenzyl chlorides in a corona excited supersonic expansion, we revised previous assignments of the 3,4-, 2,4-, and 2,5-dimethylbenzyl radicals. Spectroscopic data of electronic transition and vibrational mode frequencies in the ground electronic state of each isomer were accurately determined by comparing them with those obtained by an ab initio calculation and with the known vibrational data of 1,2,4-trimethylbenzene. PMID:22149790

Yoon, Young Wook; Lee, Sang Kuk

2011-12-01

335

Equilibrium Assignment Model with Uncertainties in Traffic Demands  

Directory of Open Access Journals (Sweden)

Full Text Available In this study, we present an equilibrium traffic assignment model considering uncertainties in traffic demands. The link and route travel time distributions are derived based on the assumption that OD traffic demand follows a log-normal distribution. We postulate that travelers can acquire the variability of route travel times from past experiences and factor such variability into their route choice considerations in the form of mean route travel time. Furthermore, all travelers want to minimize their mean route travel times. We formulate the assignment problem as a variational inequality, which can be solved by a route-based heuristic solution algorithm. Some numerical studies on a small test road network are carried out to validate the proposed model and algorithm, at the same time, some reasonable results are obtained.

Aiwu Kuang; Zhongxiang Huang

2013-01-01

336

The problem of assigning responsibility for greenhouse gas emissions  

Energy Technology Data Exchange (ETDEWEB)

The paper discusses different methods to assign the responsibility for Greenhouse gas (GHG) emissions: the geographical approach, based on the IPCC guidelines for GHG inventory; the consumer responsibility approach, based on the Ecological Footprint methodology; the Carbon Emission Added (CEA) approach that adopts the Embodied Energy-Emergy Analysis method. The last approach tries to solve the problem between the consumer and producer accounting principles, considering also the emissions of developing countries.

Bastianoni, Simone; Pulselli, Federico Maria; Tiezzi, Enzo [Department of Chemical and Biosystem Sciences, University of Siena, Via della Diana, 2, 53100 Siena (Italy)

2004-07-01

337

Spectral assignments of new diterpenes from Hyptis martiusii Benth.  

Science.gov (United States)

The structural characterization of two new abietanes and a new spiro-fused tricyclic diterpene isolated from the roots of Hyptis martiusii is described. The first member of a new class of rearranged abietane diterpenoids designated martiusane was characterized by the use of 1D NMR and several 2D shift correlated NMR pulse sequences (1H,1H-COSY, HMQC, HMBC and NOESY). Unambiguous 1H and 13C chemical shift assignments for all compounds are reported. PMID:15390028

da Cruz Araújo, Edigênia Cavalcante; Lima, Mary Anne Sousa; Silveira, Edilberto Rocha

2004-12-01

338

Spectral assignments of new diterpenes from Hyptis martiusii Benth.  

UK PubMed Central (United Kingdom)

The structural characterization of two new abietanes and a new spiro-fused tricyclic diterpene isolated from the roots of Hyptis martiusii is described. The first member of a new class of rearranged abietane diterpenoids designated martiusane was characterized by the use of 1D NMR and several 2D shift correlated NMR pulse sequences (1H,1H-COSY, HMQC, HMBC and NOESY). Unambiguous 1H and 13C chemical shift assignments for all compounds are reported.

da Cruz Araújo EC; Lima MA; Silveira ER

2004-12-01

339

Configurational assignment of N-arylsulfonylimines of alpha-polychloroaldehydes.  

Science.gov (United States)

Configurational assignment of seven synthesized N-arylsulfonylimines of alpha-polychloroaldehydes has been carried out by means of experimental measurements and high-level ab initio calculations of their (13)C--(13)C, (13)C--(1)H and (15)N--(1)H spin-spin coupling constants. The title compounds were shown to exist in solution solely in the form of E isomers, in line with thermodynamic reasoning. PMID:17876855

Krivdin, Leonid B; Chernyshev, Kirill A; Rosentsveig, Gulnur N; Ushakova, Irina V; Rosentsveig, Igor B; Levkovskaya, Galina G

2007-11-01

340

Binary Assignments of Amino Acids from Pattern Conservation  

CERN Multimedia

We develop a simple optimization procedure for assigning binary values to the amino acids. The binary values are determined by a maximization of the degree of pattern conservation in groups of closely related protein sequences. The maximization is carried out at fixed composition. For compositions approximately corresponding to an equipartition of the residues, the optimal encoding is found to be strongly correlated with hydrophobicity. The stability of the procedure is demonstrated. Our calculations are based upon sequences in the SWISS-PROT database.

Irbäck, A; Irb\\"ack, Anders; Potthast, Frank

1997-01-01

 
 
 
 
341

Understanding medication adherence via lived experience: An experiential learning exercise for nursing students  

Directory of Open Access Journals (Sweden)

Full Text Available Patients often receive a prescription with little instruction, which they often do not follow. These “non-compliant” patientsare seen as being difficult or resistant. However, in reality these patients may truly be struggling to make a majorbehavioral change with little help or direction. Nurses’ play a major role in the education and support of patients receivingnew prescriptions, but too often nurses provide little more support and guidance than the medical provider. Unfortunately,some nurses also engage in the negative labeling of these patients. The purpose of the learning assignment described herewas to provide pre-licensure nursing students an experiential learning opportunity to increase understanding and empathyfor the difficulties often embedded in behavioral changes required when patients are asked to follow a new medicalregimen. The framework for the assignment was Kolb’s Experiential Learning Model, which posits that lived experienceallows for the transformation of theoretical or classroom knowledge into functional skills. The exercise made use ofplacebo medication and a 3 week course of treatment, during which time students kept written records of their adherenceand feelings. Literature review, classroom discussion and a scholarly paper were used to help students process theexperience. One focus of the post-experience processing was the application of newly gained knowledge in thedevelopment of nursing interventions to help with non-adherence.

John Brion

2012-01-01

342

A Medical Interviewing Curriculum Intervention for Medical Students' Assessment of Suicide Risk.  

UK PubMed Central (United Kingdom)

OBJECTIVE Effective communication strategies are required to assess suicide risk. The authors determined whether a 2-hour simulated-patient activity during a psychiatry clerkship improved self-assessment of medical interviewing skills relevant to suicide risk-assessment. METHODS In the 2-hour simulated-patient intervention, at least one psychiatrist, a non-clinician communication expert, and a specifically-trained simulated patient worked with groups of 4-6 students to address student-identified challenges with patient encounters involving suicide risk-assessment. Six of twelve clerkships between July 2010 and October 2011 were assigned to this educational intervention in addition to a communications curriculum. RESULTS On a retrospective pre-post self-assessment, the 61 of 118 students assigned to the intervention group reported greater improvements in relevant skills. The process of discovering/responding to patients' feelings and identifying/addressing verbal and nonverbal cues specifically improved. CONCLUSION The psychiatry clerkship provides a unique opportunity to reinforce and develop communications skills with a formal, skills-based curriculum.

Fiedorowicz JG; Tate J; Miller AC; Franklin EM; Gourley R; Rosenbaum M

2013-05-01

343

Does racial bias influence psychiatric diagnoses assigned at first hospitalization?  

UK PubMed Central (United Kingdom)

BACKGROUND: Research on racial bias in psychiatric diagnosis has largely been limited to studies of admission diagnoses assigned to chronically ill patients. This study tests whether racial bias influences diagnoses assigned to patients at discharge from their first psychiatric hospitalization. METHODS: In a county-wide sample of patients with psychosis, hospital diagnoses were compared with research diagnoses formulated using structured interviews and strict adherence to DSM-III-R. Symptom patterns were also examined. RESULTS: Racial differences were observed in the distribution of both hospital and research diagnoses. Using research diagnoses as the gold standard, the sensitivities and specificities of hospital diagnoses were similar by race (for blacks the sensitivity and specificity of schizophrenia was 0.33 and 0.91, and for whites, 0.43 and 0.89). The only suggestion of possible bias was that more blacks were discharged without a definitive diagnosis (38.7% of blacks vs. 26.3% of whites, chi(2) = 5.80, df = 1, p = 0.02). CONCLUSIONS: We did not observe the expected racial bias in the assignment of diagnoses of schizophrenia and affective disorders. While there was evidence that hospital clinicians had more difficulty diagnosing black patients, the low concordance between hospital and research diagnoses for both black and white patients demonstrates the need to better understand the clinical diagnostic process for all patients with psychotic disorders at their first hospitalization.

Sohler NL; Bromet EJ

2003-08-01

344

Assigning dose of nicotine gum by time to first cigarette.  

UK PubMed Central (United Kingdom)

INTRODUCTION: Nicotine gum, a proven effective aid to cessation, comes in two doses: 2-mg and 4-mg. Assignment to the higher dose has traditionally been based on daily cigarette consumption. This paper evaluates efficacy of the gum when the 4-mg dose is assigned based on time to first cigarette (TTFC) being ? 30 min. METHODS: In a secondary analysis of a randomized, double-blind, placebo-controlled trial that allocated smokers randomly to placebo, 2-mg, or 4-mg gum (Garvey, A. J., Kinnunen, T., Nordstrom, B. L., Utman, C. H., Doherty, K., Rosner, B., et al. (2000). Effects of nicotine gum dose by level of nicotine dependence. Nicotine & Tobacco Research, 2, 53-63. doi:10.1080/14622200050011303), we evaluated outcomes when 4-mg gum was given to subjects with TTFC ? 30 (n = 158, placebo n = 159). RESULTS: Active treatment doubled or tripled abstinence rates versus placebo. This also held among smokers with a history of treatment failure. The effect of 4-mg gum was significant among light smokers (<25 CPD) with TTFC ? 30; 2-mg gum was not. CONCLUSION: This analysis suggests that assigning dose of nicotine gum based on TTFC is an effective and appropriate means of dose allocation.

Shiffman S; Sembower MA; Rohay JM; Gitchell JG; Garvey AJ

2013-02-01

345

A direct comparison of protein interaction confidence assignment schemes  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background Recent technological advances have enabled high-throughput measurements of protein-protein interactions in the cell, producing large protein interaction networks for various species at an ever-growing pace. However, common technologies like yeast two-hybrid may experience high rates of false positive detection. To combat false positive discoveries, a number of different methods have been recently developed that associate confidence scores with protein interactions. Here, we perform a rigorous comparative analysis and performance assessment among these different methods. Results We measure the extent to which each set of confidence scores correlates with similarity of the interacting proteins in terms of function, expression, pattern of sequence conservation, and homology to interacting proteins in other species. We also employ a new metric, the Signal-to-Noise Ratio of protein complexes embedded in each network, to assess the power of the different methods. Seven confidence assignment schemes, including those of Bader et al., Deane et al., Deng et al., Sharan et al., and Qi et al., are compared in this work. Conclusion Although the performance of each assignment scheme varies depending on the particular metric used for assessment, we observe that Deng et al. yields the best performance overall (in three out of four viable measures). Importantly, we also find that utilizing any of the probability assignment schemes is always more beneficial than assuming all observed interactions to be true or equally likely.

Suthram Silpa; Shlomi Tomer; Ruppin Eytan; Sharan Roded; Ideker Trey

2006-01-01

346

Assignment of points to three-dimensional trajectories  

Energy Technology Data Exchange (ETDEWEB)

The subject of this thesis is the assignment of 3-D points to trajectories in the context of computer vision and image understanding. Successive frames of points, 3-D range-images, are assigned to trajectories according to smoothness of motion criteria. No assumptions are made about rigidity of objects. The 3-D range images used may originate from any range finder such as stereo vision, a time-of-flight range finder, etc. These range images are assumed to be arriving in a variety of applications such as autonomous vehicle navigation or intrusion detection in addition to its application in scene analysis. Greedy exchange algorithms are examined and versions that accept continuously arriving sets of points are implemented in the C programming language. The algorithm implementations are embedded in a software test-frame which simulates the continuous arrival of 3-D range-images. The simulated range images are generated in such a way as to assign points to trajectories at random. Then the algorithms are used to reassign the points to the correct trajectories, thus testing the efficacy of the algorithms. A parallel implementation is attempted on a 12 processor Encore computer and some possibilities for a processor array implementation, such as a systolic array or a wavefront array processor, are described. 17 refs., 20 figs.

Sorsby, C.R.

1988-10-01

347

Shape Assignment by Genetic Algorithm towards Designing Optimal Areas  

Directory of Open Access Journals (Sweden)

Full Text Available This paper presents a preliminary study on space allocation focusing on the rectangular shapes to be assigned into an area with an intention to find optimal combination of shapes. The proposed solution is vital for promoting an optimal planting area and eventually finds the optimal number of trees as the ultimate goal. Thus, the evolutionary algorithm by GA technique was performed to find the objective. GAs by implementing some metaheuristic approaches is one of the most common techniques for handling ambiguous and / or vast possible solutions. The shape assignment strategy by the determined shapes coordinate to be assigned into an area was introduced. The aim of this study is to gauge the capability of GA to solve this problem. Therefore some strategies to determine the chromosome representation and genetic operators are essential for less computational time and result quality. Some areas coordinate were used to generate the optimal solutions. The result indicates the GA is able to fulfill both feasible result and acceptable time.

Ismadi Md Badarudin; Abu Bakar Md Sultan; Md Nasir Sulaiman; Ali Mamat; Mahmud Tengku Muda Mohamed

2010-01-01

348

Solving Large Quadratic Assignment Problems on Computational Grids.  

UK PubMed Central (United Kingdom)

The quadratic assignment problem (QAP) is among the hardest combinatorial optimization problems.Some instances of size n = 30 have remained unsolved for decades. The solution of these problemsrequires both improvements in mathematical programming algorithms and the utilization of powerful computationalplatforms. In this article we describe a novel approach to solve QAPs using a state-of-the-artbranch-and-bound algorithm running on a federation of geographically distributed resources known as acomputational grid. Solution of QAPs of unprecedented complexity, including the nug30, kra30b, and tho30problems, is reported.Key words. Quadratic assignment problem -- branch and bound -- computational grid -- metacomputing1. IntroductionThe quadratic assignment problem (QAP) is a standard problem in location theory. TheQAP in "Koopmans-Beckmann" form is tominnXi=1nXj=1a ij b (i);(j) +nXi=1c i;(i) ;where a ij is the flow between facilities i and j, b kl is...

Delta Jeff Linderoth

349

Lower Bounds from Tile Covers for the Channel Assignment Problem  

UK PubMed Central (United Kingdom)

A method to generate lower bounds for the channel assignment problem is given.The method is based on the reduction of the channel assignment problem to a problemof covering the demand in a cellular network by pre-assigned blocks of cells, calledtiles. This tile cover approach is applied to networks with a cosite constraint and twodi#erent constraints between cells. New bounds are derived using this method, whichlead to improved results when applied to an example from the literature.ResumeNous donnons une methode pour generer des bornes inferieures pour le problemede l'a#ectation de canaux. La methode est basee sur la reduction du probleme del'a#ectation de canaux a un probleme de couverture de la demande dans le reseaucellulaire par des groupes de cellules avant un besoin minimal de canaux precalcules.Ces groupes de cellules sont appeles des tuiles. Nous appliquons la methode de lacouverture par tuiles a des reseaux avec une contrainte co-site et deux di#erentescontraintes inter-site. Nous derivons des nouvelles bornes inferieures en utilisant cettemethode. Appliquees a un exemple tire de la litterature, ces bornes donnent desmeilleurs resultats.Les Cahiers du GERAD G--2000--09 11

J. C. M. Janssen; T. E. Wentzell; Les Cahiers Du Gerad

350

Risky Business: Malcolm X, Student-Centered Learning and "Ethos."  

Science.gov (United States)

|Describes the author's approach to student-centered learning through writing workshops. Focuses on a series of class assignments in which students read, write about, and discuss "The Autobiography of Malcolm X" to encourage them to accept responsibility for their own learning. (JAD)|

Harris, Jeane

1988-01-01

351

The Impact of Conferencing Assessment on EFL Students’ Grammar Learning  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This article reports on a study that was carried out in order to examine the impact of conferencing assessment on students’ learning of English grammar. Forty-two Iranian intermediate university students were randomly assigned to an experimental and a control group. The participants in th...

Baleghizadeh Sasan; Zarghami Zahra

352

Turning to Turnitin to Fight Plagiarism among University Students  

Science.gov (United States)

This paper reports on a pilot project of the Turnitin plagiarism detection software, which was implemented to determine the impact of the software on the level of plagiarism among University of Botswana (UB) students. Students' assignments were first submitted to the software without their knowledge so as to gauge their level of plagiarism. The…

Batane, Tshepo

2010-01-01

353

Student's Perspectives in a Web-Based Distance Education Course.  

Science.gov (United States)

|This case study examined student perspectives in regard to a Web-based distance education graduate course in language education at a major university in the United States. Data were obtained from the six students enrolled in the course through observation by the instructor, interviews, and review of course documents and assignments. Four of the…

Hara, Noriko

354

Polynomial Weights or Generalized Geometric Weights: Yet Another Scheme for Assigning Credits to Multiple Authors  

CERN Multimedia

Devising a weight assignment policy for assigning credits to multiple authors of a manuscript is a challenging task. In this paper, we present a scheme for assigning credits to multiple authors that we call a polynomial weight assignment scheme. We compare our scheme with other schemes proposed in the literature.

Abbas, Ash Mohammad

2011-01-01

355

REQUIRED NAVIGATION PERFORMANCE AUTHORIZATION REQUIRED ????? ?? ??????? ? ????????????? ????????? ?? ?????? ????????? ???????????? ????????????? ????? ?? ??????? ? ????????????? ????????? ?? ?????? ????????? ???????????? ?????????????  

Directory of Open Access Journals (Sweden)

Full Text Available The article deals with the concept of required navigation performances and also the concept ofRNP AR APCH. The main exploitation preferences and benefits are considered according to thesafety of aviation. Efficiency and safety of the given specification usage are argued?????????? ????????, ?????????????? ????, ?????????? ?? ??????????? ???????? ???????? ??????? ? ????????????? ????????? ?? ?????? ????????? ???????????? ?????????????,?? ?????????? ??????????? ???????.??????? ?????: ??????????? ????????, ???????? ??????????? ??????????????, ????????????????????? ??????????? ??????????????, ????? ???????.?????????? ????????, ?????????????? ????, ?????????? ?? ??????????? ???????? ???????? ??????? ? ????????????? ????????? ?? ?????? ????????? ???????????? ?????????????,?? ?????????? ??????????? ???????

?. ?????; ?. ????????????; ?. ???????

2011-01-01

356

Teaching About Energy: Power of a Student  

Science.gov (United States)

This student activity is designed to help students understand the concept of power. The energy required to climb stairs, and the rate at which students can do this, illustrates this concept. The energy requirements for other common activities are given to help students calculate their energy needs. Included are notes for instructors wishing to use this material. This activity is part of a PTRA manual on Energy.

Roeder, John

2006-01-17

357

WRITTEN EXAMS: CONCRETE SOLUTION TO SOLVE IMAGE-TEXT RELATION FOR VISUAL COMMUNICATION DESIGN STUDENTS (ART STUDENTS)?  

Directory of Open Access Journals (Sweden)

Full Text Available Post modern visual culture and semiotic places great emphasis on image as well as text; consequently, learning now includes the study of both text and image that are made up of many forms of mixed media, and does not separate text from images. Visual Communication Design’s Students have seldom taken written exams, reading text, and writing assignments. Most design’s subject matter emphasize in studio productions. Thus the lecturers have seldom given exams or assignments which relate between text and images. One of design’s subject matter is photography. Most photographic lecturers had never given written exams; instead they gave photo assignments for final project. Most of the lecturers gave either written exams or studio productions, but they have seldom or never integrate the text and images. The survey research conducted on 100 communication design students in third and fifth semester, and three photographic lecturers, in Tarumanagara University. The photographic lecturers prepared learning materials, student’s presentation, and exams with combine text and images. Problem based learning was used to make students more focused on the themes and assignments. Moreover, the lecturers can facilitates student, supervise student, and provide feed back. Barrett’s photo criticism was used to help students relate text and image of photographs. Some guided question was modified from Barrett’s photo criticism model. The guided questions and images selections became important steps during delivery materials, and listed in lecturer’s presentation and student’s assignments. The guided questions and a good selection of images helped the discussion, and brought students to complex thinking.

Iwan Zahar; Abdullah Sani Kamaluddin

2012-01-01

358

A Safety Net for Homeless Students.  

Science.gov (United States)

Of 1,700 homeless in Orange County, Florida, 40 percent are families. In 1988, a coalition of 34 agencies formed to address this challenge. A school district task force composed of community members, university student tutors, and key players from transportation services, pupil assignment, health services, Chapter 1, extended day, exceptional…

Pawlas, George; And Others

1994-01-01

359

Social Media: It's What Students Do  

Science.gov (United States)

In assessing the application of social media on the teaching of business communication, this article looks at MBA student use of blogs, online photo database contributions, and video contributions to YouTube channels. These assignments were part of their course activities, which included a 2-week study tour in China. The article looks at these…

Kelm, Orlando R.

2011-01-01

360

My Experience as Student Project Leader  

Directory of Open Access Journals (Sweden)

Full Text Available The author worked in an engineering college as a teacher. He completed one semester as a student leader of a class project in hand to investigate, write and produce. This paper describes the management process of organizing the class into groups of writers, highlighting the document into sections, assigning research topics and writing groups, and establishing deadlines for the project timetable.

SERENE WONG

2009-01-01

 
 
 
 
361

The methods that college students use to answer questions about stereochemistry involving spatial ability  

Science.gov (United States)

Introduction. The research problem investigated involved determining the spatial techniques used by students when they solved problems relating to stereochemistry using both traditional and non-traditional techniques. The main reason for undertaking this study was to determine how to help students invoke their spatial ability in solving problems during their organic chemistry courses. The project allowed students to generate their own understanding of the material, to gain experience in order to increase their knowledge, and to be actively involved in the learning process in order for true understanding to take place. Methods. The qualitative methodology for the project included a background questionnaire and the Purdue Visualization of Rotations Exam to determine the five students to be interviewed. The class participated in three multimedia lectures, an in-class assignment, and an on-line homework activity, which allowed multiple ways of incorporating the material. These activities included hand-drawing structures, making non-traditional models as well as traditional models, and computer related exercises that required differing aspects of spatial ability and engagement. Five students participated in an individual and small group interview in which rotation ability as well as visualization ability was assessed using physical molecular models as well as computer models. Results. This study is significant for the field of science education and chemistry because it determined that students with varying levels of spatial ability preferred different tools and used different skills when answering questions about stereochemistry that require spatial ability. There was a pronounced difference in the ability of low and high spatial ability students to draw and make structures that required three-dimensional aspects. A distinct preference for working with the physical model kit over the computer-enhanced program was also noted. An online resource for instructors and students of organic chemistry to use when studying stereochemistry was developed during the project. Conclusions. The potential impact on teaching and learning is that other instructors of chemistry will be able to develop problems and training sessions for their specific students that are "tailor made" to fit their students' abilities and interests. Consequently, students with either high or low spatial ability can work problems with tools that best fit their skills.

Strange de Soria, Luise Ethelyn

362

Gender identity and gender role orientation in female assigned patients with disorders of sex development.  

UK PubMed Central (United Kingdom)

PURPOSE: Gender identity and gender role orientation were assessed in 24 female assigned patients with disorders of sex development. MATERIALS AND METHODS: A total of 16 patients were prenatally exposed to androgens, of whom 15 had congenital adrenal hyperplasia and 1 was virilized due to maternal tumor. Eight patients had 46,XY karyotype, of whom 5 had partial and 3 had complete androgen insensitivity syndrome. Gender identity was measured by the 27-item Gender Identity/Gender Dysphoria Questionnaire for Adolescents and Adults with 167 female medical students as controls, and gender role was assessed by the femininity and masculinity subscales of the 30-item Bem Sex Role Inventory with 104 female and 64 male medical students as controls. RESULTS: No patient reached the cutoff for gender identity disorder on the Gender Identity/Gender Dysphoria Questionnaire for Adolescents and Adults. However, patients with 46,XY karyotype demonstrated a somewhat more conflicted gender identity, although the overall differences were relatively small. As to gender role orientation, patients with complete androgen insensitivity syndrome had high scores on the femininity and masculinity scales of the Bem Sex Role Inventory, which made them the most androgynous group. CONCLUSIONS: Our findings, although clinically not clear cut, suggest that patients with disorders of sex development are a heterogeneous group regarding gender identity and gender role outcomes, and that this issue should be discussed with the family when treatment plans are made.

Mattila AK; Fagerholm R; Santtila P; Miettinen PJ; Taskinen S

2012-11-01

363

Apron layout design and flight-to-gate assignment at Lanseria International Airport  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english Air traffic is continuously increasing and more efficient air transport systems are required to handle the air travel demand. The study investigates the expansion of Lanseria International Airport in Gauteng, South Africa. Expansion of Lanseria requires a study of the airport apron layout to ensure efficient passenger-aircraft flow as well as the efficient flow of aircraft to and from the airport. The candidate layout designs are based on the layout concept of the Hartsfi (more) eld-Jackson Atlanta International Airport in Atlanta, USA. In the study, different airport apron layouts were compared, including the existing layout of Atlanta Airport, via a simulation model of each. Designs based mainly on passenger transfer distance between the terminal building and aircraft were evaluated. The cross-entropy method was used to develop a generic flight-to-gate assignment program that minimises passenger transfer distances.

Leonard, T.; Bekker, J.

2013-01-01

364

Conformity of behaviors among medical students: impact on performance of knee arthrocentesis in simulation.  

Science.gov (United States)

Although the development of collaborative relationships is considered a requirement for medical education, the functioning of these relationships may be impaired by a well-documented social-psychological phenomenon known as group conformity. The authors hypothesized that students would insert a needle into an incorrect location relative to the patella when performing a knee arthrocentesis if they believed that their peers had also inserted a needle in the same incorrect location. This was a randomized controlled study conducted in 2011 with 60 medical students (24 male; 40.0 %) who were randomly assigned to either using a knee model that had a skin with holes left by peers inserting needles in the wrong location, or a knee with no marks in the skin. Each student's aspiration site was measured with a fibreglass ruler to determine whether it was correctly located within the superior third, 1 cm medial to the patella. The researchers determined that students who used the marked skin were more likely to insert the needle in the incorrect location compared to those who used the clean skin (n = 31, 86.11 vs. n = 14, 58.33 %), Fisher's exact test (1) = 5.93, p < 0.05, Cramer's ? = 0.31. This study demonstrates incorrect performance of the knee arthrocentesis procedure in simulation when students use a damaged model, which may be due to conformity. It suggests that further research on the impact of conformity in medical education is warranted. PMID:22936210

Beran, Tanya N; McLaughlin, Kevin; Al Ansari, Ahmed; Kassam, Aliya

2012-08-31

365

41 CFR 102-75.665 - What happens after the disposal agency receives the assignment recommendation from DOI?  

Science.gov (United States)

...receives the assignment recommendation from DOI? 102-75.665 Section 102-75...receives the assignment recommendation from DOI? If, after considering other uses...approves the assignment recommendation from DOI, it must assign the property by letter...

2009-07-01

366

Vietnamese Students Employability Skills  

Directory of Open Access Journals (Sweden)

Full Text Available This paper attempts to investigate if the International University (IU) students’ core competencies can meet the requirements set by employers, what are the differences in core competencies in final year students (or undergraduates), and how they view themselves compared with ex-students after one or two years in working environment, how differences in levels of competencies which are expected to outperform the job expectations and competencies possessed by ex-students, and any differences in levels of competencies self-rated by undergraduates due to gender. Questionnaires, mean score comparison, independent-samples T-tests, paired-samples T-tests are used to analyze data collected from 120 employers/managers in various companies/organizations in Ho Chi Minh City and Binh Duong province, 105 ex-students, and 102 final year business students. The core competencies are drawn from the behavioral competency dictionary of Organizational Readiness Office, Canada (2007). The research results can provide good suggestions to IU in specific and other foreign invested universities in Vietnam to produce competent students for the ever-changing labor market.

Nguyen Minh Tuan

2011-01-01

367

Third year nursing students' understanding of how to find and evaluate information from bibliographic databases and Internet sites.  

Science.gov (United States)

The aim of this study was to increase undergraduate nursing students' knowledge of finding and evaluating information from selected bibliographic databases and Internet sites. A quasi-experimental design was adopted. The 2004 autumn cohort (n=480) was divided into two approximately equal groups at the beginning of their studies. One group was subjected to a greater number of assignments requiring them to find and evaluate bibliographic and Internet-based information. The assignments were spread throughout the curriculum. Questionnaires were used to collect data. The low response rate makes generalizing the findings difficult. Only small differences were demonstrated between the knowledge of the revised assignment group and that of the other students. Both groups had a poor understanding of the use of important search and evaluation techniques. The results indicate that strategies proven in one context are not necessarily as effective in a new context and that more research is needed into which learning activities best enhance the development of information literacy skills during undergraduate nursing education. PMID:21288607

Jacobsen, Hilary E; Andenæs, Randi

2011-02-01

368

Third year nursing students' understanding of how to find and evaluate information from bibliographic databases and Internet sites.  

UK PubMed Central (United Kingdom)

The aim of this study was to increase undergraduate nursing students' knowledge of finding and evaluating information from selected bibliographic databases and Internet sites. A quasi-experimental design was adopted. The 2004 autumn cohort (n=480) was divided into two approximately equal groups at the beginning of their studies. One group was subjected to a greater number of assignments requiring them to find and evaluate bibliographic and Internet-based information. The assignments were spread throughout the curriculum. Questionnaires were used to collect data. The low response rate makes generalizing the findings difficult. Only small differences were demonstrated between the knowledge of the revised assignment group and that of the other students. Both groups had a poor understanding of the use of important search and evaluation techniques. The results indicate that strategies proven in one context are not necessarily as effective in a new context and that more research is needed into which learning activities best enhance the development of information literacy skills during undergraduate nursing education.

Jacobsen HE; Andenæs R

2011-11-01

369

ADAPTIVE POLE ASSIGNMENT CONTROL OF CD PLAYER ARM  

Directory of Open Access Journals (Sweden)

Full Text Available This study provides a design procedure for the self tuning adaptive control of a CD arm controller. The inputs are the forces of the mechanical actuators while the outputs are related to the tracking accuracy of the arm. The data was measured in closed loop, and then through a two-step procedure converted to open loop equivalentdata the inputs are highly colored. Rely on the obtained model, the parameters of the CD player arm will be estimated online and according to those parameters a self tuning poles assignment controller is designed to force the output to track a desire response.

A.Arab Khazael,; M.Nasirzadeh

2010-01-01

370

The resolution of aglinin A epimers and their NMR assignments.  

Science.gov (United States)

Aglinin A (1) is a mixture of C(24)-epimeric 20S,24-epoxy-24,25-dihydroxy-3,4-secodammar-4(28)-en-3-oic acid and present in plants of the family Meliaceae. The two epimers of 1 were resolved through an acetonide reaction, and the absolute configurations of two derivatives were deduced by the analysis of their (13)C NMR differences induced by ?-gauche or steric effect. Based on it, the (13)C NMR assignment of 24R-1 and 24S-1 was also established. PMID:23324033

Feng, Tian-Xiang; Qu, Shi-Jin; Tan, Jun-Jie; Jiang, Kun; Tan, Chang-Heng; Lin, Shuang-Jun

2013-01-17

371

The resolution of aglinin A epimers and their NMR assignments.  

UK PubMed Central (United Kingdom)

Aglinin A (1) is a mixture of C(24)-epimeric 20S,24-epoxy-24,25-dihydroxy-3,4-secodammar-4(28)-en-3-oic acid and present in plants of the family Meliaceae. The two epimers of 1 were resolved through an acetonide reaction, and the absolute configurations of two derivatives were deduced by the analysis of their (13)C NMR differences induced by ?-gauche or steric effect. Based on it, the (13)C NMR assignment of 24R-1 and 24S-1 was also established.

Feng TX; Qu SJ; Tan JJ; Jiang K; Tan CH; Lin SJ

2013-01-01

372

¹H, ¹³C and ¹?N resonance assignments of human BASP1.  

UK PubMed Central (United Kingdom)

Brain acid-soluble protein 1 (BASP1, CAP-23, NAP-22) appears to be implicated in diverse cellular processes. An N-terminally myristoylated form of BASP1 has been discovered to participate in the regulation of actin cytoskeleton dynamics in neurons, whereas non-myristoylated nuclear BASP1 acts as co-suppressor of the potent transcription regulator WT1 (Wilms' Tumor suppressor protein 1). Here we report NMR chemical shift assignment of recombinant human BASP1 fused to an N-terminal cleavable His6-tag.

Geist L; Zawadzka-Kazimierczuk A; Saxena S; ?erko S; Ko?mi?ski W; Konrat R

2013-10-01

373

A Survey of the Routing and Wavelength Assignment Problem  

DEFF Research Database (Denmark)

When transmitting data in an all-optical network, data connections must be established in such a way that two or more connections never share a wavelength on the same fi ber. The NP-hard Routing and Wavelength Assignment (RWA) problem consists of finding paths and wavelengths for a set of data connections. This survey introduces the RWA and gives an overview of heuristic, metaheuristic and exact solution methods from the literature. Running times for the heuristic methods are presented and computational results are discussed.

Gamst, Mette

2009-01-01

374

The virtual advisor program: linking students to mentors via the world wide web.  

UK PubMed Central (United Kingdom)

BACKGROUND: Emergency medicine (EM) is a popular specialty for medical students choosing a career. Many attend medical schools without an affiliated EM residency and lack both the formal mentorship and informal guidance provided by medical school advisors (or faculty) involved in an accredited EM training program. Others desire specialized advice based on geographic or specific academic interest. OBJECTIVE: The authors describe user characteristics of a Web-based virtual advisor program that paired medical students with EM faculty advisors. METHODS: Prospective users access the system from a link on the Society for Academic Emergency Medicine (SAEM) home page. On the initial visit, demographic information is collected. Faculty and student guidelines are provided. Students desiring individual advice may register for a virtual advisor who can assess career goals and qualifications. Volunteer faculty mentors are assigned on the basis of the student's geographic and demographic preferences and career aspirations. Encounters rely primarily on electronic and/or voice correspondence to suit the needs of the pair. A frequently asked question (FAQ) section provides answers to common questions and does not require registration. RESULTS: Two hundred sixty-four students (183 males, 75 females, 6 unspecified) from North American (87) and international (25) medical schools requested a virtual advisor. One hundred twenty-one faculty advisors from 56 U.S. medical schools participated (86 [71%] males; 35 [29%] females). Students indicated reasons they sought a virtual advisor. Qualitative feedback was generally positive from advisors and advisees. CONCLUSION: The implementation of the virtual advisor program enabled medical students to have access to experienced EM faculty career mentors.

Coates WC; Ankel F; Birnbaum A; Kosiak D; Broderick KB; Thomas S; Leschke R; Collings J

2004-03-01

375

Is It Worth the Effort? How Feedback Influences Students' Subsequent Submission of Assessable Work  

Science.gov (United States)

This paper explores the extent to which students appear to their assessors to act on feedback they have received, and questions the assumption that providing feedback alone is sufficient to effect higher standards of work by students. Feedback provided to 51 undergraduate social work students, on two consecutive assignments involving a similar…

Crisp, Beth R.

2007-01-01

376

Practice Makes Perfect: Improving Students' Skills in Understanding and Avoiding Plagiarism with a Themed Methods Course  

Science.gov (United States)

To address the issue of plagiarism, students in two undergraduate Research Methods and Analysis courses conducted, analyzed, and wrote up original research on the topic of plagiarism. Students in an otherwise identical course completed the same assignments but examined a different research topic. At the start and end of the semester, all students

Estow, Sarah; Lawrence, Eva K.; Adams, Kathrynn A.

2011-01-01

377

The Effectiveness of the New 9th Grade Biology Curriculum on Students' Environmental Awareness  

Science.gov (United States)

|The aim of this study was to examine the effectiveness of a new 9th grade biology curriculum on students' environmental awareness. Participants included 91 ninth grade students in a high school in Balikesir during the spring semester of the 2008-2009 academic years. Two classrooms, including 22 and 24 students respectively, were randomly assigned

Cetin, Gulcan; Nisanci, Seda Hilal

2010-01-01

378

Student-Posed Problems  

Science.gov (United States)

As part of weekly reports,1 structured journals in which students answer three standard questions each week, they respond to the prompt, If I were the instructor, what questions would I ask or problems assign to determine if my students understood the material? An initial analysis of the results shows that some student-generated problems indicate fundamental misunderstandings of basic physical concepts. A further investigation explores the relevance of the problems to the week's material, whether the problems are solvable, and the type of problems (conceptual or calculation-based) written. Also, possible links between various characteristics of the problems and conceptual achievement are being explored. The results of this study spark many more questions for further work. A summary of current findings will be presented, along with its relationship to previous work concerning problem posing.2 1Etkina, E. Weekly Reports;A Two-Way Feedback Tool, Science Education, 84, 594-605 (2000). 2Mestre, J.P., Probing Adults Conceptual Understanding and Transfer of Learning Via Problem Posing, Journal of Applied Developmental Psychology, 23, 9-50 (2002).

Harper, Kathleen A.; Etkina, Eugenia

2002-10-01

379

Learning Disabilities and Student Accommodations  

Science.gov (United States)

This workshop presentation covers the issues of student learning disabilities and the accommodations that students with these disabilities will require. Types of learning disabilities, ways to identify them, and their impact specifically in physics classes are covered. Case studies and questions for discussion are also presented.

Olsen, Julia

2007-04-16

380

Adapting for Students with Autism  

Science.gov (United States)

Autism is the most common condition in a group of developmental disorders known as the autism spectrum disorders (ASDs). Although autism is considered a low-incidence disorder, many music educators in schools today teach students with autism each week. Students with ASDs usually require similar educational interventions that are adapted to their…

Darrow, Alice-Ann

2009-01-01

 
 
 
 
381

Adapting for Students with Autism  

Science.gov (United States)

|Autism is the most common condition in a group of developmental disorders known as the autism spectrum disorders (ASDs). Although autism is considered a low-incidence disorder, many music educators in schools today teach students with autism each week. Students with ASDs usually require similar educational interventions that are adapted to their…

Darrow, Alice-Ann

2009-01-01

382

Reflective assignments in mental health nursing courses: factors to consider.  

UK PubMed Central (United Kingdom)

It is important that mental health educators are clear about the nature and practice of reflective processes and their appropriate uses and inherent challenges. Active reflection was developed as a strategy for professional self-improvement in practice-based disciplines. Some mental health nursing courses use reflective exercises as a formal student assessment component. In this article, the authors draw on their experience and the literature to identify issues relating to aspects of the course, educators, and students that are associated with incorporating reflection-related activities as compulsory assessable items in an undergraduate nursing course.

Cleary M; Horsfall J; Hunt GE

2013-02-01

383

Create a Bacterium: an Engaging Semester-Long Assignment  

Directory of Open Access Journals (Sweden)

Full Text Available Like many other educators, I have adapted the “Adopt a Bacterium” exercise developed by Dr. Amy Cheng Vollmer for use in my microbiology course.  Building upon the success of the “Adopt a Bacterium,” I developed the “Create a Bacterium” exercise aiming to challenge even more my upper-level undergraduate science majors. To create a bacterium, students not only had to search for and organize information, but also to analyze and evaluate information (higher-order learning skills). Most importantly, students were challenged to engage in the highest level of the cognitive domain of Bloom’s revised taxonomy, synthesis or creation.

Min-Ken Liao

2010-01-01

384

Effects of academic service learning in drug misuse and addiction on students' learning preferences and attitudes toward harm reduction.  

Science.gov (United States)

OBJECTIVE. To examine academic service-learning pedagogy on student learning and perceptions of drug misuse and addiction. DESIGN. Third- and fourth-year pharmacology students were exposed to an academic service-learning pedagogy that integrated a community service experience with lectures, in-class discussions and debates, group projects, a final paper, and an examination. Reflective writing assignments throughout the course required students to assimilate and apply what they had learned in the classroom to what they learned in their community placement. ASSESSMENT. Changes in students' responses on pre- and post-course survey instruments reflected shifts toward higher-order thinking. Also, subjective student-learning modalities shifted toward learning by writing. Students' perspectives and attitudes allowed improved context of issues associated with drug misuse and harm reduction models. CONCLUSION. Academic service-learning pedagogy contributes to developing adaptable, well-rounded, engaged learners who become more compassionate and pragmatic in addressing scientific and social questions relating to drug addiction. PMID:23610481

Kabli, Noufissa; Liu, Ben; Seifert, Tricia; Arnot, Michelle I

2013-04-12

385

Satisfying assignments of Random Boolean CSP: Clusters and Overlaps  

CERN Document Server

The distribution of overlaps of solutions of a random CSP is an indicator of the overall geometry of its solution space. For random $k$-SAT, nonrigorous methods from Statistical Physics support the validity of the ``one step replica symmetry breaking'' approach. Some of these predictions were rigorously confirmed in \\cite{cond-mat/0504070/prl} \\cite{cond-mat/0506053}. There it is proved that the overlap distribution of random $k$-SAT, $k\\geq 9$, has discontinuous support. Furthermore, Achlioptas and Ricci-Tersenghi proved that, for random $k$-SAT, $k\\geq 8$. and constraint densities close enough to the phase transition there exists an exponential number of clusters of satisfying assignments; moreover, the distance between satisfying assignments in different clusters is linear. We aim to understand the structural properties of random CSP that lead to solution clustering. To this end, we prove two results on the cluster structure of solutions for binary CSP under the random model from Molloy (STOC 2002) 1. For ...

Istrate, Gabriel

2007-01-01

386

Bayesian assignment of gene ontology terms to gene expression experiments  

Science.gov (United States)

Motivation: Gene expression assays allow for genome scale analyses of molecular biological mechanisms. State-of-the-art data analysis provides lists of involved genes, either by calculating significance levels of mRNA abundance or by Bayesian assessments of gene activity. A common problem of such approaches is the difficulty of interpreting the biological implication of the resulting gene lists. This lead to an increased interest in methods for inferring high-level biological information. A common approach for representing high level information is by inferring gene ontology (GO) terms which may be attributed to the expression data experiment. Results: This article proposes a probabilistic model for GO term inference. Modelling assumes that gene annotations to GO terms are available and gene involvement in an experiment is represented by a posterior probabilities over gene-specific indicator variables. Such probability measures result from many Bayesian approaches for expression data analysis. The proposed model combines these indicator probabilities in a probabilistic fashion and provides a probabilistic GO term assignment as a result. Experiments on synthetic and microarray data suggest that advantages of the proposed probabilistic GO term inference over statistical test-based approaches are in particular evident for sparsely annotated GO terms and in situations of large uncertainty about gene activity. Provided that appropriate annotations exist, the proposed approach is easily applied to inferring other high level assignments like pathways. Availability: Source code under GPL license is available from the author. Contact: peter.sykacek@boku.ac.at

Sykacek, P.

2012-01-01

387

Pole assignment for control of flexible link mechanisms  

Science.gov (United States)

Although the dynamics of flexible link mechanisms and manipulators is nonlinear, motion and vibration control often relies on linear or piecewise-linear controllers based on linearized models in order to ensure real-time implementability. Keeping such an objective in mind, this paper proposes a general receptance-based method for pole assignment in flexible link mechanisms with a single rigid-body degree of freedom (dof) using a single control force (i.e. rank-one control). A chief advantage of the approach proposed is that it makes use of the second-order system model representation through the receptance matrix of the symmetric part of the asymmetric model. The asymmetric terms in the stiffness and damping matrices arise from the coupling between rigid-body motion and elastic motion. The proposed receptance-based formulation ensures numerical reliability and efficiency also for large dimensional and ill-conditioned system models originating from the simultaneous presence of high-frequency and weakly controllable oscillating modes, and of rigid-body motion low-frequency dynamics, which may also be unstable. The validation of the proposed technique is carried out by performing pole assignment through position and velocity feedback or acceleration and velocity feedback on a mechanism. Integral control is also introduced to improve the steady state system response. Numerical results indicate that the proposed method is more accurate and robust than two popular established methods.

Ouyang, H.; Richiedei, D.; Trevisani, A.

2013-06-01

388

Fiber Assignment in Next-generation Wide-field Spectrographs  

CERN Document Server

We present an optimized algorithm for assigning fibers to targets in next-generation fiber-fed multi-object spectrographs. The method, that we named draining algorithm, ensures that the maximum number of targets in a given target field is observed in the first few tiles. Using randomly distributed targets and mock galaxy catalogs we have estimated that the gain provided by the draining algorithm as compared to a random assignment can be as much as 2% for the first tiles. This would imply for a survey like BigBOSS saving for observation several hundred thousand objects or, alternatively, reducing the covered area in ~350 sq. deg. An important advantage of this method is that the fiber collision problem can be solved easily and in an optimal way. We also discuss additional optimizations of the fiber positioning process. In particular, we show that allowing for rotation of the focal plane can improve the efficiency of the process in ~3.5-4.5% even if only small adjustments are permitted (up to 2 deg). For instru...

Morales, Isaac; Azzaro, Marco; Prada, Francisco; Sanchez, Justo; Becerril, Santiago

2011-01-01

389

Mechanisms of responsibility assignment during redundant reaching movements.  

UK PubMed Central (United Kingdom)

When the two hands act together to achieve a goal, the redundancy of the system makes it necessary to distribute the responsibility for error corrections across the two hands. In an experiment in which participants control a single cursor with the movements of both hands, we show that right-handed individuals correct for movement errors more with their nondominant left hand than with their right hand, even though the dominant right hand corrects the same errors more quickly and efficiently when each hand acts in isolation. By measuring the responses to rapid cursor and target displacements using force channels, we demonstrate that this shift is due to a modulation of the feedback gains of each hand rather than to a shift in the onset of the corrective response. We also show that the shift toward left-hand corrections is more pronounced for errors that lead to adaptation (cursor displacements) than for perturbations that do not (target displacements). This finding provides some support for the idea that the motor system assigns the correction to the most likely source of the error to induce learning and to optimize future performance. Finally, we find that the relative strength of the feedback corrections in the redundant task correlates positively with those found for the nonredundant tasks. Thus the process of responsibility assignment modulates the processes that normally determine the gains of feedback correction rather than completely overwriting them.

Reichenbach A; Costello A; Zatka-Haas P; Diedrichsen J

2013-04-01

390

Assisted assignment of ligands corresponding to unknown electron density.  

Energy Technology Data Exchange (ETDEWEB)

A semi-automated computational procedure to assist in the identification of bound ligands from unknown electron density has been developed. The atomic surface surrounding the density blob is compared to a library of three-dimensional ligand binding surfaces extracted from the Protein Data Bank (PDB). Ligands corresponding to surfaces which share physicochemical texture and geometric shape similarities are considered for assignment. The method is benchmarked against a set of well represented ligands from the PDB, in which we show that we can identify the correct ligand based on the corresponding binding surface. Finally, we apply the method during model building and refinement stages from structural genomics targets in which unknown density blobs were discovered. A semi-automated computational method is described which aims to assist crystallographers with assigning the identity of a ligand corresponding to unknown electron density. Using shape and physicochemical similarity assessments between the protein surface surrounding the density and a database of known ligand binding surfaces, a plausible list of candidate ligands are identified for consideration. The method is validated against highly observed ligands from the Protein Data Bank and results are shown from its use in a high-throughput structural genomics pipeline.

Binkowski, T. A.; Cuff, M.; Nocek, B.; Chang, C.; Joachimiak, A.; Biosciences Division

2010-01-03

391

Estimating departure times from traffic counts using dynamic assignment  

Energy Technology Data Exchange (ETDEWEB)

A dynamic traffic assignment algorithm and observed traffic counts are used to estimate the distribution of departure times in a trip matrix. The objective is to find the maximum entropy distribution of departure times by origin zone subject to observed traffic counts on a subset of network links. The procedure results in the estimated number of trip departures from each origin in 10-15 minute time intervals of the full analysis period. Such an analysis period will typically range from one to three hours long. We first review the dynamic assignment algorithm developed and tested in a previous paper, and then describe its use with traffic counts to estimate the departure times of a trip matrix. We present an application to a Pittsburgh network in which trip departures are estimated for each 10-minute interval of a peak-hour survey trip matrix. Computational advances such as parallel computing will enable the procedure to be run on large networks while counts are being monitored. Such an application may provide near real-time detection of temporal trip departure profiles by origin zone. 19 refs., 1 fig., 2 tabs.

Janson, B.N.; Southworth, F. (Oak Ridge National Lab., TN (USA))

1989-07-01

392

Assignment of the stereochemistry of the isomers of IQNP  

Energy Technology Data Exchange (ETDEWEB)

The isomers of 1-azabicyclo[2.2.2]oct-3-yl {alpha}-hydroxy-{alpha}-(1-iodo-1-propen-3-yl)-{alpha}-phenylacetate (IQNP) are attractive for in vivo imaging of muscarinic receptors (mAChR). Although the stereocenter of the quinuclidinyl ring has been studied, the isomers of IQNP are oils and the configuration of the acetate center has not been elucidated. An improved synthesis of the acetate moiety (3) via a chiral intermediate has been developed and allows assignment of the configuration of the acetate. 1,3-dioxolan-4-one (1), (condensation of R- or S-mandelic acid and pivaldehyde) was alkylated with propargyl bromide, treated with base and esterified to afford R-(-)- or S-(+)-3. R- and S-3 were prepared in a 94:6 and 98:2 enantiomeric excess, respectively (HPLC analysis). R- and S-3 were utilized to synthesize the various isomers of IQNP. By comparing the optical rotation, HPLC and NMR of these isomers to those prepared by classical resolution allows the assignment of E-R, R-IQNP as the isomer demonstrating binding to M{sub 1} mAChR subtype and Z-R, R-IQNP as the isomer binding to M{sub 1} and M{sub 2}mAChR subtypes. This route also permits a simplified route for the preparation of the isomers of IQNP.

McPherson, D.W.; Knapp, F.F. Jr. [Oak Ridge National Lab., TN (United States)

1996-05-01

393

The zeta(2) Limit in the Random Assignment Problem  

UK PubMed Central (United Kingdom)

The random assignment (or bipartite matching) problem asks aboutAn = minP ni=1 c(i; (i)), where (c(i; j)) is a n Theta n matrix with i.i.d.entries, say with exponential(1) distribution, and the minimum is overpermutations . M'ezard and Parisi (1987) used the replica method fromstatistical physics to argue non-rigorously that EAn ! i(2) =2=6. Aldous(1992) identified the limit in terms of a matching problem on a limitinfinite tree. Here we construct the optimal matching on the infinite tree.This yields a rigorous proof of the i(2) limit and of the conjectured limitdistribution of edge-costs and their rank-orders in the optimal matching.It also yields the asymptotic essential uniqueness property: every almostoptimalmatching coincides with the optimal matching except on a smallproportion of edges.Key words and phrases. Assignment problem, bipartite matching, cavitymethod, combinatorial optimization, distributional identity, infinite tree, probabilistica...

David J. Aldous

394

Using a Cast Iron Hand-Pump to Teach Students About Water Resources and Resource Allocation  

Science.gov (United States)

Simply turning on the tap brings safe, clean, fresh-tasting water to most Americans. Students never need to consider basic concepts about water supply, including their daily water consumption and the quality of the water required for drinking. In stark contrast, the issues of water quality and quantity play a central role in people’s daily lives in the developing world. It is difficult to convey this reality to our students through lectures alone and hands-on activities are required. In order to develop an active learning based approach, we transported a traditional cast iron hand-pump and aluminum urns from Bangladesh to the United States. The hand-pump is mounted on a cooler, which acts as a water reservoir, and is now functional and easily transportable. Using this powerful demonstration tool, we have developed an active learning module we call “How far will you walk for water?”. The goal of the module is to teach students about water quantity, water quality, and resource allocation with a focus on Arsenic and Bangladesh, but the system could be applied to other areas of concern. First the students are given a quick lecture on Arsenic, its health impacts, and the extent of contamination in Bangladesh. They are then assigned a specific well, complete with a map of their village and picture of their well and a water sample (pre-spiked with arsenic to be above or below the 10 ug/L WHO limit). Next they pump the wellhead, fill an urn, walk down the hall and back, and measure the distance walked. This is compared to the distance from their village home to their private well, to safe wells belonging to neighbors and to a community well. The students then use the Hach Arsenic test kit to test the arsenic levels in their water samples and learn if their well is safe to drink. Finally, given all this information students must determine if they should continue drinking from their well or switch to a new well, even if that means making multiple, long trips each day. This module has introduced the students to important water resource concepts, such as water quality testing, usage and water delivery options. It also provides students the opportunity to consider how much time and effort to should be allocated to obtaining water given known health risks. On follow up tests we use transfer questions that ask students to select the locations for installing community wells based on a data showing contaminated wells in a village. We have utilized this module with High School, Undergraduate, and Graduate students and it excites and engages students while teaching many basic water resource issues.

Mailloux, B. J.; Radloff, K. A.

2010-12-01

395

Cake Batter Lava: Student Page  

Science.gov (United States)

This is the Teacher Page of an activity that teaches students about some of the geological processes and structures that form as lava flows across planetary landscapes by using cake batter as an analog for lava. This page has experiment procedures, a list of the required materials, key words, and a link to the required data tables students will fill out. This activity is part of Exploring Planets in the Classroom's Volcanology section.

396

Rapid assessment of assignments using plagiarism detection software.  

UK PubMed Central (United Kingdom)

Faculty members most often use plagiarism detection software to detect portions of students' written work that have been copied and/or not attributed to their authors. The rise in plagiarism has led to a parallel rise in software products designed to detect plagiarism. Some of these products are configurable for rapid assessment and teaching, as well as for plagiarism detection.

Bischoff WR; Abrego PC

2011-11-01

397

77 FR 33573 - Final Priorities, Requirements, and Selection Criteria-Comprehensive Centers Program (CFDA Number...  

Science.gov (United States)

...culturally and linguistically gifted students by using the Comprehensive Centers...specific initiatives related to gifted students, the requirements for both the...specifically identify initiatives for gifted students in the final priorities....

2012-06-06

398

Requirements for optimal learning environment for an online project risk management game  

Directory of Open Access Journals (Sweden)

Full Text Available Normal.dotm 0 0 1 350 1998 UTS 16 3 2453 12.0 0 false 18 pt 18 pt 0 0 false false false Several authors have questioned the effectiveness of using lecture-based teaching to provide students with enough confidence to apply project risk management. Gaming was proposed as a solution. However, despite widespread use of games in teaching project management, it is still not clear what conditions provide optimal learning through games. Another shortcoming with the existing games is oversimplification.  This paper addresses these shortcomings and proposes a game design that captures real-life challenges associated with applying the project risk management process; a design that prompts an appreciation for project complexity as well as providing students with the opportunity to experience the consequences of ignoring or following the risk management process. The paper also identifies and elaborates on the requirements for optimum learning, and distinguishes between two types of requirements: 1) learning requirements, and 2) qualitative requirements.  Learning requirements identify the learning outcomes of the game. These requirements were identified through structured and semi-structured interviews with senior project managers from several management-consulting firms. The challenges and the corresponding tactics that are adopted in practice in order to manage project risks were thus identified and ranked. These results are also presented in light of supporting literature. The challenges and associated tactics were mapped into a set of eight requirements representing the learning outcomes of the game. These requirements were then mapped to the design using four instructional methods: a briefing lecture, a team-based assignment, an online computer simulation, and a debriefing lecture. All these methods were linked by a real-life project case and executed in a gaming context to improve engagement.  Qualitative requirements represent important conditions that must be present for optimal learning. These were identified through structured interviews with continuing education students taking a master's degree in project management. This empirical study resulted in four qualitative requirements that must be considered in the game design: 1) ownership, 2) relevance, 3) feedback, and 4) adaptation.  The paper also presents the evaluation results of the game design. The purpose of the evaluation was to examine the game's ability to capture the two sets of requirements identified above.    

Bassam Hussein

2012-01-01

399

Automated group assignment in large phylogenetic trees using GRUNT: GRouping, Ungrouping, Naming Tool  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background Accurate taxonomy is best maintained if species are arranged as hierarchical groups in phylogenetic trees. This is especially important as trees grow larger as a consequence of a rapidly expanding sequence database. Hierarchical group names are typically manually assigned in trees, an approach that becomes unfeasible for very large topologies. Results We have developed an automated iterative procedure for delineating stable (monophyletic) hierarchical groups to large (or small) trees and naming those groups according to a set of sequentially applied rules. In addition, we have created an associated ungrouping tool for removing existing groups that do not meet user-defined criteria (such as monophyly). The procedure is implemented in a program called GRUNT (GRouping, Ungrouping, Naming Tool) and has been applied to the current release of the Greengenes (Hugenholtz) 16S rRNA gene taxonomy comprising more than 130,000 taxa. Conclusion GRUNT will facilitate researchers requiring comprehensive hierarchical grouping of large tree topologies in, for example, database curation, microarray design and pangenome assignments. The application is available at the greengenes website 1.

Dalevi Daniel; DeSantis Todd Z; Fredslund Jakob; Andersen Gary L; Markowitz Victor M; Hugenholtz Philip

2007-01-01

400

Quantitative assignment of reaction directionality in constraint-based models of metabolism: application to Escherichia coli.  

Science.gov (United States)

Constraint-based modeling is an approach for quantitative prediction of net reaction flux in genome-scale biochemical networks. In vivo, the second law of thermodynamics requires that net macroscopic flux be forward, when the transformed reaction Gibbs energy is negative. We calculate the latter by using (i) group contribution estimates of metabolite species Gibbs energy, combined with (ii) experimentally measured equilibrium constants. In an application to a genome-scale stoichiometric model of Escherichia coli metabolism, iAF1260, we demonstrate that quantitative prediction of reaction directionality is increased in scope and accuracy by integration of both data sources, transformed appropriately to in vivo pH, temperature and ionic strength. Comparison of quantitative versus qualitative assignment of reaction directionality in iAF1260, assuming an accommodating reactant concentration range of 0.02-20mM, revealed that quantitative assignment leads to a low false positive, but high false negative, prediction of effectively irreversible reactions. The latter is partly due to the uncertainty associated with group contribution estimates. We also uncovered evidence that the high intracellular concentration of glutamate in E. coli may be essential to direct otherwise thermodynamically unfavorable essential reactions, such as the leucine transaminase reaction, in an anabolic direction. PMID:19783351

Fleming, R M T; Thiele, I; Nasheuer, H P

2009-09-01

 
 
 
 
401

Quantitative assignment of reaction directionality in constraint-based models of metabolism: application to Escherichia coli.  

UK PubMed Central (United Kingdom)

Constraint-based modeling is an approach for quantitative prediction of net reaction flux in genome-scale biochemical networks. In vivo, the second law of thermodynamics requires that net macroscopic flux be forward, when the transformed reaction Gibbs energy is negative. We calculate the latter by using (i) group contribution estimates of metabolite species Gibbs energy, combined with (ii) experimentally measured equilibrium constants. In an application to a genome-scale stoichiometric model of Escherichia coli metabolism, iAF1260, we demonstrate that quantitative prediction of reaction directionality is increased in scope and accuracy by integration of both data sources, transformed appropriately to in vivo pH, temperature and ionic strength. Comparison of quantitative versus qualitative assignment of reaction directionality in iAF1260, assuming an accommodating reactant concentration range of 0.02-20mM, revealed that quantitative assignment leads to a low false positive, but high false negative, prediction of effectively irreversible reactions. The latter is partly due to the uncertainty associated with group contribution estimates. We also uncovered evidence that the high intracellular concentration of glutamate in E. coli may be essential to direct otherwise thermodynamically unfavorable essential reactions, such as the leucine transaminase reaction, in an anabolic direction.

Fleming RM; Thiele I; Nasheuer HP

2009-12-01

402

Promoter sequence of fibroin gene assigned by in vitro transcription system.  

UK PubMed Central (United Kingdom)

We have shown that the silk fibroin gene from Bombyx mori is faithfully transcribed in an in vitro transcription system of the HeLa cell extract prepared by the method of Manley et al. [Manley, J. L., Fire, A., Cano, A., Sharp, P. A. & Gefter, M. L. (1980) Proc. Natl. Acad. Sci. USA 77, 3855-3859]. Using this system and a series of deletion mutants of fibroin gene, we have assigned the promoter sequence of fibroin gene. The 5' boundary of the promoter is around nucleotide position -29, indicating that most of the T-A-T-A-A-A-A sequence (-30 to -24) is essential for the promoter function, where the transcription initiation point of fibroin gene is assigned as nucleotide position +1 [Tsuda, M., Ohshima, Y. & Suzuki, Y. (1979) Proc. Natl. Acad. Sci. USA 76, 4872-4876]. The 3' boundary is around nucleotide position +6. However, to support the efficient, faithful transcription, some additional (more than 26 but less than 41) nucleotides of nonspecific origin are required at the 5' side of -29. Functions ascribed to the promoter region are discussed.

Tsujimoto Y; Hirose S; Tsuda M; Suzuki Y

1981-08-01

403

An ideal mass assignment scheme for measuring the Power Spectrum with FFTs  

CERN Document Server

In measuring the power spectrum of the distribution of large numbers of dark matter particles in simulations, or galaxies in observations, one has to use Fast Fourier Transforms (FFT) for calculational efficiency. However, because of the required mass assignment onto grid points in this method, the measured power spectrum $\\la |\\delta^f(k)|^2\\ra$ obtained with an FFT is not the true power spectrum $P(k)$ but instead one that is convolved with a window function $|W(\\vec k)|^2$ in Fourier space. In a recent paper, Jing (2005) proposed an elegant algorithm to deconvolve the sampling effects of the window function and to extract the true power spectrum, and tests using N-body simulations show that this algorithm works very well for the three most commonly used mass assignment functions, i.e., the Nearest Grid Point (NGP), the Cloud In Cell (CIC) and the Triangular Shaped Cloud (TSC) methods. In this paper, rather than trying to deconvolve the sampling effects of the window function, we propose to select a particu...

Cui, Weiguang; Yang, Xiaohu; Wang, Yu; Feng, Longlong; Springel, Volker

2008-01-01

404

An Eigenstructure Assignment for a Static Synchronous Compensator  

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Full Text Available Problem statement: Power flow through an AC transmission line is influenced by three basic electrical parameters, which are line impedance, magnitudes and phase-shift angle between the sending and receiving voltages. Therefore, the change in any of the three basic parameters means a change in the power flow through the transmission line. The aims of this research paper are: increase the power transfer capability of transmission systems, minimize the transmission losses, support a good voltage profile and retain system stability under large disturbances. Study the use of eigenstructure techniques for state feedback control of the power system static compensator. Therefore, the mathematical analysis was performed for eigenvector assignment, power flow transmission line and for the static compensator analysis based on the transformation of the three-phase into d-q frame. Approach: A novel control method for regulating the power system in case of abnormal conditions was carried out. The system considered is a static synchronous compensator. The study includes a detailed mathematical analysis of the impact of the shunt compensator on the power flow; investigation of the system constraints and their effects on the static compensator control; in addition simulation of static compensator to control a transmitted active power flow on the transmission line. The conducted method provides a way of constructing the state feedback gain matrix to satisfy a certain prescribed performance. Results: The solutions of the obtained equation were conducted using the computer simulation method for both open-loop and static compensator techniques. The result shows fast tracking of the power flow transient response when using the static compensator technique comparing with open-loop technique. However, the same trend of the behavior was observed for all cases. Conclusion: A new method for developing a parameterized feedback matrix that assigns a closed-loop prespecified set of eigenvalues was obtained. It improves the overall system performance and yields a class of controllers contributing uniformly to the assignment process. The voltage could be kept constant independent of the loads with static compensator. The results show clearly the applicability of the proposed control scheme which is acceptable for the static compensator.

Ahmad N. Al-Husban

2009-01-01

405

Motivation of engineering students in higher education  

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Full Text Available This paper examines motivational factors affecting Higher Education (HE) students in the Faculty of Technology at the University of Portsmouth. A reliable identification of motivational factors would usefully inform pedagogical interventions. Students who are more intrinsically motivated may benefit from less prescriptive assignments which offer more freedom to choose from ‘formative’ assessment topics in which they have a greater personal interest. For those who are more extrinsically motivated, where the final, ‘summative’ grade is thought of as the most important, pedagogical styles may less influence students’ motivation. In the current study, the investigatory approaches employed to assess motivation discover different results. While questionnaire responses indicated that students operate both intrinsically and extrinsically, semi-structured interviews found little evidence of the former, with most students indicating that they operate extrinsically.

Nick Savage; Roy Birch; Eleni Noussi

2011-01-01

406

Frontier Assignment for Sensitivity Analysis of Data Envelopment Analysis  

Science.gov (United States)

To extend the sensitivity analysis capability for DEA (Data Envelopment Analysis), this paper proposes frontier assignment based DEA (FA-DEA). The basic idea of FA-DEA is to allow a decision maker to decide frontier intentionally while the traditional DEA and Super-DEA decide frontier computationally. The features of FA-DEA are as follows: (1) provides chances to exclude extra-influential DMU (Decision Making Unit) and finds extra-ordinal DMU, and (2) includes the function of the traditional DEA and Super-DEA so that it is able to deal with sensitivity analysis more flexibly. Simple numerical study has shown the effectiveness of the proposed FA-DEA and the difference from the traditional DEA.

Naito, Akio; Aoki, Shingo; Tsuji, Hiroshi

407

Combat ophthalmology. When there isn't an assigned ophthalmologist.  

UK PubMed Central (United Kingdom)

The National Guard has extensive capabilities that are impossible to attain in active duty units, largely because its citizen Soldiers bring their civilian expertise in addition to their military occupational specialties. While deploying to Afghanistan as the flight surgeon for a forward deployed Special Forces (SF) battalion, this Colorado Army National Guardsman also provided basic ophthalmology care in theater in the absence of an assigned ophthalmologist. The SF Battalion Preventive Medicine (PM) NCO was also an experienced eye technician in civilian life. Emergency eye surgery was provided for allied, coalition and host nationals in accordance with the Rules of Engagement. Elective eye surgery was an excellent method to build rapport and trust in keeping with the Special Forces "winning the hearts and minds" philosophy.

Enzenauer RW; Vavra DE; Butler F

2007-01-01

408

NMR assignment of the galactomannan of Candida lipolytica.  

UK PubMed Central (United Kingdom)

The chemical structure of the cell wall galactomannan of Candida lipolytica was analyzed using two-dimensional NMR techniques without chemical fragmentation. The H-1-H-2-correlated cross-peaks of the galactomannan indicated that it consists of an alpha-1,6-linked mannan backbone moiety with side chains. A sequential NMR assignment of the side chains through nuclear Overhauser effect (NOE) cross-peaks indicated that the triose side chain contains an alpha-1,2-linked galactopyranose unit at the non-reducing terminal. The structure was significantly different from the galactomannan of Trichophyton. The molar ratio of the side chains calculated from the H-1 signal dimensions indicated that ca. 45% of the backbone alpha-1,6-linked mannose units are not substituted with side chains and are responsible for the reactivity of the galactomannan with factor 9 serum.

Ikuta K; Shibata N; Kanehiko H; Kobayashi H; Suzuki S; Okawa Y

1997-09-01

409

[Vibrational assignment analysis of Raman spectra of fatty alcohols].  

UK PubMed Central (United Kingdom)

In the present research, Raman spectra of 31 fatty alcohols were calculated by B3LYP/6-31G (d) and verified by taking methanol for example. The study results indicate that B3LYP/6-31G (d) is an effective approach for the fatty alcohols Raman spectra calculated. The vibrational assignment and Raman spectra features of 6 unbranched alcohols were discussed and the vibrating peaks derived from stretching vibration by C-O were chosen as the research target selection, and the multiple principal component regression models were established and validated with the parameters including polarizability, thermodynamic and energy parameters of the above unbranched alcohols. There exists significant correlation between the vibrating peaks derived from stretching vibration by C-O of fatty alcohols and the parameters (sig. = 0.015). This study will benefit the Raman spectra research of homologs.

Zou Q; Du XY; Zhang C; Li XC; Li Y

2013-01-01

410

UPMASK: unsupervised photometric membership assignment in stellar clusters  

CERN Document Server

We develop a method for membership assignment in stellar clusters using only photometry and positions. The method, UPMASK, is aimed to be unsupervised, data driven, model free, and to rely on as few assumptions as possible. It is based on an iterative process, principal component analysis, clustering algorithm, and kernel density estimations. Moreover, it is able to take into account arbitrary error models. An implementation in R was tested on simulated clusters that covered a broad range of ages, masses, distances, reddenings, and also on real data of cluster fields. Running UPMASK on simulations showed that it effectively separates cluster and field populations. The overall spatial structure and distribution of cluster member stars in the colour-magnitude diagram were recovered under a broad variety of conditions. For a set of 360 simulations, the resulting true positive rates (a measurement of purity) and member recovery rates (a measurement of completeness) at the 90% membership probability level reached ...

Krone-Martins, A

2013-01-01

411

The Optimization Model of Runway and Gate Assignment  

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Full Text Available This paper is aimed to develop the optimization model of time slot utilization for both runway and apron gate of airport system. The model considers the objectives of airline company to minimize flight-taxiing-time and waiting-time for both landing and take-off. The optimization makes use of Network Representation (NR) in the form of two bipartite networks in order to transform the problem of runway and apron gate assignment into the network flow problem. Maximum Matching and Minimum Cost Flow on NR are the core of the model. An illustrative example is presented. The result shows that the model could increase both runway and apron gate capacities to as close as their theoretical capacities. Compared to the common practice which concerns only; the nearest available runway slot time, behind the scheduled time, and the nearest location of available gates to serve the flight, the model could reduce the total taxiing and waiting time.

Nahry .; Tjahjono T.; Satiti Y.J.

2013-01-01