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Sample records for surveying problem stefka

  1. A Survey of Transportation Problems

    OpenAIRE

    2014-01-01

    This paper aims at being a guide to understand the different types of transportation problems by presenting a survey of mathematical models and algorithms used to solve different types of transportation modes (ship, plane, train, bus, truck, Motorcycle, Cars, and others) by air, water, space, cables, tubes, and road. Some problems are as follows: bus scheduling problem, delivery problem, combining truck trip problem, open vehicle routing problem, helicopter routing problem, truck loading p...

  2. Potential Theory Surveys and Problems

    CERN Document Server

    Lukeš, Jaroslav; Netuka, Ivan; Veselý, Jiří

    1988-01-01

    The volume comprises eleven survey papers based on survey lectures delivered at the Conference in Prague in July 1987, which covered various facets of potential theory, including its applications in other areas. The survey papers deal with both classical and abstract potential theory and its relations to partial differential equations, stochastic processes and other branches such as numerical analysis and topology. A collection of problems from potential theory, compiled on the occasion of the conference, is included, with additional commentaries, in the second part of this volume.

  3. Survey Based Reviewof Elicitation Problems

    Directory of Open Access Journals (Sweden)

    Sidra Arshad

    2016-02-01

    Full Text Available Any software development process is the combination of multiple development activities and each activity has a vital role in the software development cycle. Requirement Engineering is the main and basic branch of Software Engineering, it has many phases but the most initial phase is Requirement Elicitation. In this phase requirements are gathered for system development. This paper provides a literature review of the requirements engineering processes performed in traditional and modern development processes and analyses the problems in the requirements elicitation phase. This problem analysis is based on a survey which was conducted in University. A questionnaire posing questions regarding the problems in requirement elicitation was given to final year computer science graduate students who are working on their final year project as a requirement for their degree. The theoretical analysis of the questionnaire further clarifies the problems. This problems analysis will help to find out the main problems which are faced by the perspective software developers.

  4. Linearization problem in pseudolite surveys

    Science.gov (United States)

    Cellmer, Slawomir; Rapinski, Jacek

    2010-06-01

    GPS augmented with pseudolites (PL), can be used in various engineering surveys. Also pseudolite—only navigation system can be designed and used in any place, even if GPS signal is not available (Kee et al. Development of indoor navigation system using asynchronous pseudolites, 1038-1045, 2000). Especially in engineering surveys, where harsh survey environment is common, pseudolites have a lot of applications. Pseudolites may be used in construction sites, open pit mines, city canyons, GPS and PL baseline processing is similar, although there are few differences that must be taken into account. One of the major issues is linearization problem. The source of the problem is neglecting second terms of Taylor series expansion in GPS baseline processing software. This problem occurs when the pseudolite is relatively close to the receiver, which is the case in PL surveys. In this paper authors presents the algorithm for GPS + PL data processing including, neglected in classical GPS only approach, second terms of Taylor series expansion. The mathematical model of adjustment problem, detailed proposal of application in baseline processing algorithms, and numerical tests are presented.

  5. Problem neurology residents: a national survey.

    Science.gov (United States)

    Tabby, David S; Majeed, Muhammed H; Schwartzman, Robert J

    2011-06-14

    Problem residents are found across most medical specialties at a prevalence of about 10%. This study was designed to explore the prevalence and causes of problem neurology residents and to compare neurology programs' responses and outcomes. Directors of 126 US neurology residency programs were sent an electronic survey. We collected data on demographics, first and all "identifiers" of problem residents, and year of training in which the problem was found. We asked about observable signs, etiology, and who performed remediation. We asked what resources were used and what outcomes occurred. Ninety-five program directors completed surveys (75% response rate). Almost all neurology programs have problem residents (81%). Age, sex, marital status, being a US native, or attending a US medical school had no effect on problem status. Being a parent carried a lower likelihood of problems (32%). Most commonly the problem is acted on during the first year of training. Faculty members without defined educational roles were the most frequent first identifiers. Program directors were the most common remediators. The most common remediation techniques were increasing supervision and assigning a faculty mentor. Graduate medical education office and psychiatric or psychological counseling services were most often used. Eleven percent of problem residents required a program for impaired physicians and 14% required a leave of absence. Sixteen percent were dismissed from their programs. The prevalence of problem residents in neurology is similar to other disciplines, and various resources are available to remediate them.

  6. Problem based Learning in surveying Education

    DEFF Research Database (Denmark)

    Enemark, Stig

    The challenge of the future will be that the only constant is change. Therefore, the educational base must be flexible. The graduates must possess skills to adapt to a rapidly changing labour market and they must possess skills to deal with even the unknown problems of the future. The point is...... that opportunity. The basis principles of this educational model are presented using the surveying programme at Aalborg University as an example....

  7. Problem based Learning in surveying Education

    DEFF Research Database (Denmark)

    Enemark, Stig

    The challenge of the future will be that the only constant is change. Therefore, the educational base must be flexible. The graduates must possess skills to adapt to a rapidly changing labour market and they must possess skills to deal with even the unknown problems of the future. The point is......, that professional and technical skills can be acquired and updated at a later stage in ones career while skills for problem-solving and skills for learning to learn can only be achieved through the process of academic training at he universities. The concept of project-organised education provides just...... that opportunity. The basis principles of this educational model are presented using the surveying programme at Aalborg University as an example....

  8. Surveying Graduate Students' Attitudes and Approaches to Problem Solving

    CERN Document Server

    Mason, Andrew

    2016-01-01

    Students' attitudes and approaches to problem solving in physics can profoundly influence their motivation to learn and development of expertise. We developed and validated an Attitudes and Approaches to Problem Solving survey by expanding the Attitudes towards Problem Solving survey of Marx and Cummings and administered it to physics graduate students. Comparison of their responses to the survey questions about problem solving in their own graduate level courses vs. problem solving in the introductory physics courses provides insight into their expertise in introductory and graduate level physics. The physics graduate students' responses to the survey questions were also compared with those of introductory physics and astronomy students and physics faculty. We find that, even for problem solving in introductory physics, graduate students' responses to some survey questions are less expert-like than those of the physics faculty. Comparison of survey responses of graduate students and introductory students for...

  9. Engineering surveying theory and examination problems for students

    CERN Document Server

    Schofield, W

    2013-01-01

    Engineering Surveying: Theory and Examination Problems for Students, Volume 1, Third Edition discusses topics concerning engineering surveying techniques and instrumentations. The book is comprised of eight chapters that cover several concerns in engineering survey. Chapter 1 discusses the basic concepts of surveying. Chapter 2 deals with simple and precise leveling, while Chapter 3 covers earthworks. The book also talks about the theodolite and its applications, and then discusses optical distance measurement. Curves, underground and hydrographic surveying, and aspects of dimensional control

  10. Surveying problem solution with theory and objective type questions

    CERN Document Server

    Chandra, AM

    2005-01-01

    The book provides a lucid and step-by-step treatment of the various principles and methods for solving problems in land surveying. Each chapter starts with basic concepts and definitions, then solution of typical field problems and ends with objective type questions. The book explains errors in survey measurements and their propagation. Survey measurements are detailed next. These include horizontal and vertical distance, slope, elevation, angle, and direction. Measurement using stadia tacheometry and EDM are then highlighted, followed by various types of levelling problems. Traversing is then explained, followed by a detailed discussion on adjustment of survey observations and then triangulation and trilateration.

  11. Surveying graduate students’ attitudes and approaches to problem solving

    Directory of Open Access Journals (Sweden)

    Chandralekha Singh

    2010-12-01

    Full Text Available Students’ attitudes and approaches to problem solving in physics can profoundly influence their motivation to learn and development of expertise. We developed and validated an Attitudes and Approaches to Problem Solving survey by expanding the Attitudes toward Problem Solving survey of Marx and Cummings and administered it to physics graduate students. Comparison of their responses to the survey questions about problem solving in their own graduate-level courses vs problem solving in the introductory physics courses provides insight into their expertise in introductory and graduate-level physics. The physics graduate students’ responses to the survey questions were also compared with those of introductory physics and astronomy students and physics faculty. We find that, even for problem solving in introductory physics, graduate students’ responses to some survey questions are less expertlike than those of the physics faculty. Comparison of survey responses of graduate students and introductory students for problem solving in introductory physics suggests that graduate students’ responses are in general more expertlike than those of introductory students. However, survey responses suggest that graduate-level problem solving by graduate students on several measures has remarkably similar trends to introductory-level problem solving by introductory students.

  12. A Survey of Vehicle Routing Problem

    Directory of Open Access Journals (Sweden)

    Cao Wujun

    2017-01-01

    Full Text Available In recent years, vehicle routing problem (VRP has become an important content in logistics management research, and has been widely used in transportation system, logistics distribution system and express delivery system. In this paper, we discuss the classification of VRP, and summarize the common constraints of VRP, model algorithm and the main research results in recent years. Finally, we analyzes the future of VRP, and it is considered that the intelligent vehicle routing problem and intelligent heuristic algorithm will be an important field of future research.

  13. Survey of Foreigners' Pronunciation Problems in Swedish.

    Science.gov (United States)

    Bannert, Robert

    This paper reports results of an analysis of pronunciation problems and error patterns in the recorded speech of 38 immigrants to Sweden. The recordings, of both spontaneous and elicited speech in Swedish, were taken from an archival collection. The native-language groups studied include British English, Spanish, Polish, Finnish, Greek, Persian,…

  14. Survey of Foreigners' Pronunciation Problems in Swedish.

    Science.gov (United States)

    Bannert, Robert

    This paper reports results of an analysis of pronunciation problems and error patterns in the recorded speech of 38 immigrants to Sweden. The recordings, of both spontaneous and elicited speech in Swedish, were taken from an archival collection. The native-language groups studied include British English, Spanish, Polish, Finnish, Greek, Persian,…

  15. Variational Approach to Impulsive Problems: A Survey of Recent Results

    Directory of Open Access Journals (Sweden)

    Fang-fang Liao

    2014-01-01

    Full Text Available We present a survey on the existence of nontrivial solutions to impulsive differential equations by using variational methods, including solutions to boundary value problems, periodic solutions, and homoclinic solutions.

  16. Variational inequalities and fixed point problems : a survey

    Directory of Open Access Journals (Sweden)

    Renu Chugh

    2014-06-01

    Full Text Available The variational inequality problem provides a broad unifying setting for the study of optimization, equilibrium and related problems and serves as a useful computational framework for the solution of a host of problems in very diverse applications. Variational inequalities have been a classical subject in mathematical physics, particularly in the calculus of variations associated with the minimization of infinite-dimensional functionals. This paper presents a survey of main results related to variational inequalities and fixed point problems defined on real Hilbert spaces and Banach spaces. Keywords: Fixed Point Problem, Inverse-Strongly-Monotone Mappings, Monotone Mappings, Projection Mappings, Variational Inequality Problem.

  17. A Survey on the Ship Loading Problem

    DEFF Research Database (Denmark)

    Iris, Cagatay; Pacino, Dario

    2015-01-01

    Recent statistics show that large container terminals can process more than 30 million containers a year, and are constantly in search for the better ways to optimize processing time, deliver high quality and profitable services. Some of the terminal decisions are, however, dependent on externali......Recent statistics show that large container terminals can process more than 30 million containers a year, and are constantly in search for the better ways to optimize processing time, deliver high quality and profitable services. Some of the terminal decisions are, however, dependent...... on externalities. One of those is the ship loading process. Based on the stowage plan received by liner shippers, terminal operators plan the execution of load and discharge operations. In this paper we present a literature review for the Ship Loading Problem, where stowage and loading sequencing and scheduling...

  18. Global Problems and College Education: A Survey of Students.

    Science.gov (United States)

    Bybee, Rodger W.; And Others

    1986-01-01

    College students identified air quality, world hunger, and war technology as the most important of 12 global problems (presented to them during a survey) and indicated that problems will become worse by the year 2000. Implications of findings for curriculum and instruction are addressed. (JN)

  19. Problem Based Internship in Surveying and Planning Curricula

    DEFF Research Database (Denmark)

    Sørensen, Esben Munk; Enemark, Stig

    2006-01-01

    another consulting agency ore company with a surveying ore land management profile. The internship is not focusing on practice training alone. The student has to prepare the internship by formulating a problem reflecting what they want to learn and how the can contribute to develop products, procedures...... by the society to serve the community with still more new knowledge and technology transfer from the international research community. The internship and still more real world influenced problem based learning by writing thesis will be and important bridge builder in the following years.......The University Programme for the education of Masters in Surveying and Planning has been reorganized. First of all the basic concept of Problem Based Learning at Aalborg University is still dominating the full curricula of the Danish Master Programme in Surveying and Planning. The five year...

  20. A survey of learning problems in black primary school children.

    Science.gov (United States)

    Cartwright, J D; Jukes, C; Wilson, A; Xaba, D

    1981-03-28

    A survey of the prevalence and types of learning disorders among Black primary school children was undertaken on the East Rand. Class teachers were given a questionnaire and asked to identify the number of children in their class with learning problems and the number of those with specific disabilities such as poor eyesight or hearing, epilepsy, physical handicaps or mental retardation. There were 7516 children in the classes surveyed; 1692 (22,4%) of them were identified by their teachers as having learning problems, while 666 (8,7%) had a physical or mental handicap. The prevalence and present status of children with learning disability need to be defined before plans to improve their education can be established. Our data show that at present classes are large and the prevalence of children with learning problems is high. Improving teachers' skills and reducing the number of children per class might improve the education of children with learning problems.

  1. Nonresponse error in mail surveys: top ten problems.

    Science.gov (United States)

    Daly, Jeanette M; Jones, Julie K; Gereau, Patricia L; Levy, Barcey T

    2011-01-01

    Conducting mail surveys can result in nonresponse error, which occurs when the potential participant is unwilling to participate or impossible to contact. Nonresponse can result in a reduction in precision of the study and may bias results. The purpose of this paper is to describe and make readers aware of a top ten list of mailed survey problems affecting the response rate encountered over time with different research projects, while utilizing the Dillman Total Design Method. Ten nonresponse error problems were identified, such as inserter machine gets sequence out of order, capitalization in databases, and mailing discarded by postal service. These ten mishaps can potentiate nonresponse errors, but there are ways to minimize their frequency. Suggestions offered stem from our own experiences during research projects. Our goal is to increase researchers' knowledge of nonresponse error problems and to offer solutions which can decrease nonresponse error in future projects.

  2. Nonresponse Error in Mail Surveys: Top Ten Problems

    Directory of Open Access Journals (Sweden)

    Jeanette M. Daly

    2011-01-01

    Full Text Available Conducting mail surveys can result in nonresponse error, which occurs when the potential participant is unwilling to participate or impossible to contact. Nonresponse can result in a reduction in precision of the study and may bias results. The purpose of this paper is to describe and make readers aware of a top ten list of mailed survey problems affecting the response rate encountered over time with different research projects, while utilizing the Dillman Total Design Method. Ten nonresponse error problems were identified, such as inserter machine gets sequence out of order, capitalization in databases, and mailing discarded by postal service. These ten mishaps can potentiate nonresponse errors, but there are ways to minimize their frequency. Suggestions offered stem from our own experiences during research projects. Our goal is to increase researchers' knowledge of nonresponse error problems and to offer solutions which can decrease nonresponse error in future projects.

  3. Aerial thermography surveys find insulator and other problems

    Energy Technology Data Exchange (ETDEWEB)

    Brydges, D. [Hydro One Networks Inc., Toronto, ON (Canada)

    2008-06-15

    Aerial thermal imaging surveying is now regularly used on Hydro One's transmission electrical system. The survey were initially conducted to identify insulator failures and wood arm deterioration after a cost benefits analysis indicated that identifying components for repair represented a fraction of the costs associated with reactive unplanned repair approaches.. Hydro One's circuits are now inspected on a priority basis. Minimum load requirements are obtained before the surveys are carried out, and system outages are monitored along with seasonal weather patterns. Surveys are conducted using a Polytec Kelvin 350 Gyro stabilized Gimbal that contains an infrared camera, a video recorder, and a camera. The system is placed on a helicopter that flies close to utility wires in order to detect anomalies. Data obtained by the helicopter surveys are then analyzed. Common analyzers include problems with bolted pads and conductor splices. Insulator anomalies include porcelain failures and problems with a lack of bonding between the rubber housing and fiberglass rods on non-ceramic insulators. It was concluded that aerial thermography plays an important role in ensuring system security. 23 figs.

  4. A survey of open problems in symplectic integration

    Energy Technology Data Exchange (ETDEWEB)

    McLachlan, R.I. [Univ. of Colorado, Boulder, CO (United States); Scovel, C. [Los Alamos National Lab., NM (United States)

    1993-10-15

    In the past few years there has been a substantial amount of research on symplectic integration. The subject is only part of a program concerned with numerically preserving a system`s inherent geometrical structures. Volume preservation, reversibility, local conservation laws for elliptic equations, and systems with integral invariants are but a few examples of such invariant structures. In many cases one requires a numerical method to stay in the smallest possible appropriate group of phase space maps. It is not the authors` opinion that symplecticity, for example, automatically makes a numerical method superior to all others, but it is their opinion that it should be taken seriously and that a conscious, informed decision be made in that regard. The authors present here a survey of open problems in symplectic integration, including other problems from the larger program. This is not intended as a review of symplectic integration and is naturally derived from the authors` own research interests. At present, this survey is incomplete, but the authors hope the help of the colleagues to be able to include in the proceedings of this conference a more comprehensive survey. Many of the problems mentioned here call for numerical experimentation, some for application of suggested but untested methods, some for new methods, and some for theorems, Some envisage large research programs.

  5. Problems and progress: survey on fat points in P2

    OpenAIRE

    Harbourne, Brian

    2001-01-01

    This paper surveys certain problems involving numerical characters for ideals I(Z) defining fat points subschemes $Z=m_1p_1+...+m_np_n$ for general points $p_i\\in {\\bf P}^2$. It also presents some new results, and includes a suite of MACAULAY 2 scripts for computing actual or conjectured values of (or bounds on) these characters. One such script, for example, is findres, which implements an algorithm due to Fitchett, Harbourne and Holay for computing the syzygy modules in a minimal free resol...

  6. Fifty Years of the Spectrum Problem: Survey and New Results

    CERN Document Server

    Durand, Arnaud; Makowsky, Johann; More, Malika

    2009-01-01

    In 1952, Heinrich Scholz published a question in the Journal of Symbolic Logic asking for a characterization of spectra, i.e., sets of natural numbers that are the cardinalities of finite models of first order sentences. G\\"unter Asser asked whether the complement of a spectrum is always a spectrum. These innocent questions turned out to be seminal for the development of finite model theory and descriptive complexity. In this paper we survey developments over the last 50-odd years pertaining to the spectrum problem. Our presentation follows conceptual developments rather than the chronological order. Originally a number theoretic problem, it has been approached in terms of recursion theory, resource bounded complexity theory, classification by complexity of the defining sentences, and finally in terms of structural graph theory. Although Scholz' question was answered in various ways, Asser's question remains open. One appendix paraphrases the contents of several early and not easily accesible papers by G. Ass...

  7. A Survey on Open Problems for Mobile Robots

    CERN Document Server

    Bandettini, Alberto; Viglietta, Giovanni

    2011-01-01

    Gathering mobile robots is a widely studied problem in robotic research. This survey first introduces the related work, summarizing models and results. Then, the focus shifts on the open problem of gathering fat robots. In this context, "fat" means that the robot is not represented by a point in a bidimensional space, but it has an extent. Moreover, it can be opaque in the sense that other robots cannot "see through" it. All these issues lead to a redefinition of the original problem and an extension of the CORDA model. For at most 4 robots an algorithm is provided in the literature, but is gathering always possible for n>4 fat robots? Another open problem is considered: Boundary Patrolling by mobile robots. A set of mobile robots with constraints only on speed and visibility is working in a polygonal environment having boundary and possibly obstacles. The robots have to perform a perpetual movement (possibly within the environment) so that the maximum timespan in which a point of the boundary is not being wa...

  8. Problems and Recommendations for Rural Statistics and Survey Methods

    Institute of Scientific and Technical Information of China (English)

    Chengjun; ZHANG

    2014-01-01

    With constant deepening of the reform and opening-up,national economic system has changed from planned economy to market economy,and rural survey and statistics remain in a difficult transition period. In this period,China needs transforming original statistical mode according to market economic system. All levels of government should report and submit a lot and increasing statistical information. Besides,in this period,townships,villages and counties are faced with old and new conflicts. These conflicts perplex implementation of rural statistics and survey and development of rural statistical undertaking,and also cause researches and thinking of reform of rural statistical and survey methods.

  9. Science and Technology Related Global Problems: An International Survey of Science Educators.

    Science.gov (United States)

    Bybee, Rodger W.; Mau, Teri

    1986-01-01

    Reviews findings from a survey which focused on the teaching of global problems related to science and technology. Includes a ranking of 12 global problems and a listing of the survey's results. Presents six specific policy recommendations for programs and practices which support a Science-Technology-Society theme. (ML)

  10. Harmonizing Screening for Gambling Problems in Epidemiological Surveys - Development of the Rapid Screener for Problem Gambling (RSPG).

    Science.gov (United States)

    Challet-Bouju, Gaëlle; Perrot, Bastien; Romo, Lucia; Valleur, Marc; Magalon, David; Fatséas, Mélina; Chéreau-Boudet, Isabelle; Luquiens, Amandine; Grall-Bronnec, Marie; Hardouin, Jean-Benoit

    2016-06-01

    Background and aims The aim of this study was to test the screening properties of several combinations of items from gambling scales, in order to harmonize screening of gambling problems in epidemiological surveys. The objective was to propose two brief screening tools (three items or less) for a use in interviews and self-administered questionnaires. Methods We tested the screening properties of combinations of items from several gambling scales, in a sample of 425 gamblers (301 non-problem gamblers and 124 disordered gamblers). Items tested included interview-based items (Pathological Gambling section of the DSM-IV, lifetime history of problem gambling, monthly expenses in gambling, and abstinence of 1 month or more) and self-report items (South Oaks Gambling Screen, Gambling Attitudes, and Beliefs Survey). The gold standard used was the diagnosis of a gambling disorder according to the DSM-5. Results Two versions of the Rapid Screener for Problem Gambling (RSPG) were developed: the RSPG-Interview (RSPG-I), being composed of two interview items (increasing bets and loss of control), and the RSPG-Self-Assessment (RSPG-SA), being composed of three self-report items (chasing, guiltiness, and perceived inability to stop). Discussion and conclusions We recommend using the RSPG-SA/I for screening problem gambling in epidemiological surveys, with the version adapted for each purpose (RSPG-I for interview-based surveys and RSPG-SA for self-administered surveys). This first triage of potential problem gamblers must be supplemented by further assessment, as it may overestimate the proportion of problem gamblers. However, a first triage has the great advantage of saving time and energy in large-scale screening for problem gambling.

  11. Nonresponse error in mail surveys: top ten problems

    National Research Council Canada - National Science Library

    Daly, Jeanette M; Jones, Julie K; Gereau, Patricia L; Levy, Barcey T

    2011-01-01

    ... utilizing the Dillman Total Design Method. Ten nonresponse error problems were identified, such as inserter machine gets sequence out of order, capitalization in databases, and mailing discarded by postal service...

  12. Nonresponse Error in Mail Surveys: Top Ten Problems

    National Research Council Canada - National Science Library

    Daly, Jeanette M; Jones, Julie K; Gereau, Patricia L; Levy, Barcey T

    2011-01-01

    ... utilizing the Dillman Total Design Method. Ten nonresponse error problems were identified, such as inserter machine gets sequence out of order, capitalization in databases, and mailing discarded by postal service...

  13. A survey on multi trip vehicle routing problem

    OpenAIRE

    2008-01-01

    The vehicle routing problem (VRP) and its variants are well known and greatly explored in the transportation literature. The vehicle routing problem can be considered as the scheduling of vehicles (trucks) to a set of customers under various side constraints. In most studies, a fundamental assumption is that a vehicle dispatched for service finishes its duty in that scheduling period after it returns back to the depot. Clearly, in many cases this assumption may not hold. Thus, in the last dec...

  14. Methodological problems in international comparisons based on national surveys

    DEFF Research Database (Denmark)

    Madsen, Henning

    1995-01-01

    Artiklen omhandler de metodemæssige problemer, der opstår, når man gennemfører internationale sammenlignende undersøgelser baseret på nationale forarbejder.......Artiklen omhandler de metodemæssige problemer, der opstår, når man gennemfører internationale sammenlignende undersøgelser baseret på nationale forarbejder....

  15. Surveying college introductory physics students’ attitudes and approaches to problem solving

    Science.gov (United States)

    Mason, Andrew J.; Singh, Chandralekha

    2016-09-01

    Students’ attitudes and approaches to problem solving in physics can greatly impact their actual problem solving practices and also influence their motivation to learn and ultimately the development of expertise. We developed and validated an attitudes and approaches to problem solving (AAPS) survey and administered it to students in the introductory physics courses in a typical large research university in the US. Here, we discuss the development and validation of the survey and analysis of the student responses to the survey questions in introductory physics courses. The introductory physics students’ responses to the survey questions were also compared with those of physics faculty members and physics PhD students. We find that introductory students are in general less expert-like than the physics faculty members and PhD students. Moreover, on some AAPS survey questions, the responses of students and faculty have unexpected trends. Those trends were interpreted via individual interviews, which helped clarify reasons for those survey responses.

  16. Surveying Turkish High School and University Students' Attitudes and Approaches to Physics Problem Solving

    Science.gov (United States)

    Balta, Nuri; Mason, Andrew J.; Singh, Chandralekha

    2016-01-01

    Students' attitudes and approaches to physics problem solving can impact how well they learn physics and how successful they are in solving physics problems. Prior research in the U.S. using a validated Attitude and Approaches to Problem Solving (AAPS) survey suggests that there are major differences between students in introductory physics and…

  17. A Survey on Inverse Problems for Applied Sciences

    Directory of Open Access Journals (Sweden)

    Fatih Yaman

    2013-01-01

    Full Text Available The aim of this paper is to introduce inversion-based engineering applications and to investigate some of the important ones from mathematical point of view. To do this we employ acoustic, electromagnetic, and elastic waves for presenting different types of inverse problems. More specifically, we first study location, shape, and boundary parameter reconstruction algorithms for the inaccessible targets in acoustics. The inverse problems for the time-dependent differential equations of isotropic and anisotropic elasticity are reviewed in the following section of the paper. These problems were the objects of the study by many authors in the last several decades. The physical interpretations for almost all of these problems are given, and the geophysical applications for some of them are described. In our last section, an introduction with many links into the literature is given for modern algorithms which combine techniques from classical inverse problems with stochastic tools into ensemble methods both for data assimilation as well as for forecasting.

  18. Menstrual problems in university students: an electronic mail survey.

    Science.gov (United States)

    Anastasakis, E; Kingman, C E; Lee, C A; Economides, D L; Kadir, R A

    2008-01-01

    To establish the prevalence of menstrual-related problems among university students. A questionnaire regarding gynecological, bleeding and family history was sent by electronic mail (e-mail) to all female students attending University College London (UCL). A total of 767 students aged 18-39 years replied; 71% had a regular menstrual cycle. One in three (n = 264) had received some treatment for their menstrual periods (such as the combined oral contraceptive pill or simple analgesia). Those with heavy or painful periods were more likely to feel that their menstrual problems had a substantial impact on their academic and social life; however, even among those with light periods, one in every four females felt that their life was considerably affected. A considerable prevalence of menstrual-related problems was demonstrated among this young healthy population. Additionally, the use of e-mail could present potential benefits as a research medium for this kind of study.

  19. Controllability Problem of Fractional Neutral Systems: A Survey

    Directory of Open Access Journals (Sweden)

    Artur Babiarz

    2017-01-01

    Full Text Available The following article presents recent results of controllability problem of dynamical systems in infinite-dimensional space. Generally speaking, we describe selected controllability problems of fractional order systems, including approximate controllability of fractional impulsive partial neutral integrodifferential inclusions with infinite delay in Hilbert spaces, controllability of nonlinear neutral fractional impulsive differential inclusions in Banach space, controllability for a class of fractional neutral integrodifferential equations with unbounded delay, controllability of neutral fractional functional equations with impulses and infinite delay, and controllability for a class of fractional order neutral evolution control systems.

  20. A Survey of the Routing and Wavelength Assignment Problem

    DEFF Research Database (Denmark)

    Gamst, Mette

    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...

  1. Surveying college introductory physics students' attitudes and approaches to problem solving

    CERN Document Server

    Mason, Andrew

    2016-01-01

    Students' attitudes and approaches to problem solving in physics can greatly impact their actual problem solving practices and also influence their motivation to learn and ultimately the development of expertise. We developed and validated an attitudes and approaches to problem solving (AAPS) survey and administered it to students in the introductory physics courses in a typical large research university in the US. Here, we discuss the development and validation of the survey and analysis of the student responses to the survey questions in introductory physics courses. The introductory physics students' responses to the survey questions were also compared with those of physics faculty members and physics PhD students. We find that introductory students are in general less expert-like than the physics faculty members and PhD students. Moreover, on some AAPS survey questions, the responses of students and faculty have unexpected trends. Those trends were interpreted via in

  2. Problem Based Internship in Surveying and Planning Curricula

    DEFF Research Database (Denmark)

    Sørensen, Esben Munk; Enemark, Stig

    2006-01-01

    for students at the 9th semester, just before they in the 10th semester is finalizing the five year education by writing their Master- Thesis. The internship gives the student the possibility to stay and work for a three month period in private surveying company, a public authority within land management ore...... of professional work being done by the host for the internship. It is expected that the student will develop skills to make their thesis with a profile that will give still more useable end employable new knowledge. When the students are away from the campus, they follow a distance learning course in “Project...... economy and – leadership”. This course is organized as an e-Learning course and the student has to develop and document their skills to follow distance e-learning courses. It will prepare them to follow and organize self paced learning in virtual environment which will develop their capacity for life...

  3. Teaching Central Eurasia in Undergraduate Survey Courses: Problems and Strategies

    Directory of Open Access Journals (Sweden)

    Amy Kardos

    2014-06-01

    Full Text Available Recent scholarship has challenged narratives of Central Eurasia’s relationships with its neighbors in East Asia, South Asia, and Southwest Asia.  This scholarship explains the trade networks that are commonly called the “Silk Routes” as the foreign trade component of a complex and dynamic Central Eurasian economy.  Scholarship of Central Eurasia also challenges long-standing narratives of “needy” or “predatory” nomads that militarily overwhelm sedentary empires. This article discusses the importance of incorporating such ideas into world history and Asian history survey courses, which are often taught by non-specialists who have only encountered Central Eurasia in their respective fields as a periphery.  Correcting misconceptions about Central Eurasia’s relationship with its neighbors also provides opportunities for students to think critically about historical sources and move past stereotypes of “barbarian” and “civilization.”

  4. Establishing Educational Priorities through the Illinois Problems Index. Survey Instruments [and] User's Manual.

    Science.gov (United States)

    Illinois State Board of Education, Springfield.

    The Illinois Problems Index (IPI), a process with supporting survey instruments, enables local school districts to assess and evaluate the adequacy of current programs and services and plan improvements where problems exist. A User's Manual provides a step-by-step "walk through" of the process, while permitting alternative techniques for…

  5. Science and technology related global problems: An international survey of science educators

    Science.gov (United States)

    Bybee, Rodger W.; Mau, Teri

    This survey evaluated one aspect of the Science-Technology-Society theme, namely, the teaching of global problems related to science and technology. The survey was conducted during spring 1984. Two hundred sixty-two science educators representing 41 countries completed the survey. Response was 80%. Findings included a ranking of twelve global problems (the top six were: World Hunger and Food Resources, Population Growth, Air Quality and Atmosphere, Water Resources, War Technology, and Human Health and Disease). Science educators generally indicated the following: the science and technology related global problems would be worse by the year 2000; they were slightly or moderately knowledgeable about the problems; print, audio-visual media, and personal experiences were their primary sources of information; it is important to study global problems in schools; emphasis on global problems should increase with age/grade level; an integrated approach should be used to teach about global problems; courses including global problems should be required of all students; most countries are in the early stages of developing programs including global problems; there is a clear trend toward S-T-S; there is public support for including global problems; and, the most significant limitations to implementation of the S-T-S theme (in order of significance) are political, personnel, social, psychological, economic, pedagogical, and physical. Implications for research and development in science education are discussed.

  6. Surveying Turkish high school and university student attitudes and approaches to physics problem solving

    CERN Document Server

    Balta, Nuri; Singh, Chandralekha

    2016-01-01

    Student attitudes and approaches to problem solving can impact how well they learn physics. Prior research in the US using a validated Attitude and Approaches to Problem Solving (AAPS) survey suggests that there are major differences between students in introductory physics and astronomy courses and physics experts in terms of their attitudes and approaches to physics problem solving. Here we discuss the validation, administration and analysis of data for the Turkish version of the AAPS survey for high school and university students in Turkey. After the validation and administration of the Turkish version of the survey, the analysis of the data was conducted by grouping the data by grade level, school type, and gender. While there are no statistically significant differences between the averages of various groups on the survey, overall, the university students in Turkey were more expert-like than vocational high school students. On an item by item basis, there are statistically differences between the average...

  7. Aggregation and non aggregation techniques for large facility location problems: A survey

    Directory of Open Access Journals (Sweden)

    Irawan Chandra Ade

    2015-01-01

    Full Text Available A facility location problem is concerned with determining the location of some useful facilities in such a way so to fulfil one or a few objective functions and constraints. We survey those problems where, in the presence of a large number of customers, some form of aggregation may be required. In addition, a review on conditional location problems where some (say q facilities already exist in the study area is presented.

  8. Men with Sexual Problems and Their Partners: Findings from the International Survey of Relationships.

    Science.gov (United States)

    Rosen, Raymond C; Heiman, Julia R; Long, J Scott; Fisher, William A; Sand, Michael S

    2016-01-01

    Epidemiologic studies of sexual function problems in men have focused on the individual male and related sociodemographic characteristics, individual risk factors and lifestyle concomitants, or medical comorbidities. Insufficient attention has been given to the role of sexual and relationship satisfaction and, more particularly, to the perspective of the couple as causes or correlates of sexual problems in men or women. Previously, we reported results of the first large, multi-national study of sexual satisfaction and relationship happiness in 1,009 midlife and older couples in five countries (Brazil, Germany, Japan, Spain, U.S.). For the present study, we examined, within each problem, the association of four major sexual problems in men (loss of sexual desire, erectile problems, premature ejaculation, delayed/absent orgasm) and multiple problems, with male and female partners' assessments of physical intimacy, sexual satisfaction, and relationship happiness, as well as associations with well-known health and psychosocial correlates of sexual problems in men. Sexual problem rates of men in our survey were generally similar to rates observed in past surveys in the general population, and similar risk factors (age, relationship duration, overall health) were associated with lack of desire, anorgasmia, or erection difficulties in our sample. As in previous surveys, there were few correlates of premature ejaculation. As predicted, men with one or more sexual problems reported decreased relationship happiness as well as decreased sexual satisfaction compared to men without sexual problems. Moreover, female partners of men with sexual problems had reduced relationship happiness and sexual satisfaction, although these latter outcomes were less affected in the women than the men. The association of men's sexual problems with men's and women's satisfaction and relationship happiness were modest, as these couples in long-term, committed relationships were notable for their

  9. A survey of the all-pairs shortest paths problem and its variants in graphs

    Directory of Open Access Journals (Sweden)

    Udaya Kumar Reddy K. R.

    2016-06-01

    Full Text Available There has been a great deal of interest in the computation of distances and shortest paths problem in graphs which is one of the central, and most studied, problems in (algorithmic graph theory. In this paper, we survey the exact results of the static version of the all-pairs shortest paths problem and its variants namely, the Wiener index, the average distance, and the minimum average distance spanning tree (MAD tree in short in graphs (focusing mainly on algorithmic results for such problems. Along the way we also mention some important open issues and further research directions in these areas.

  10. Surveying Turkish high school and university students’ attitudes and approaches to physics problem solving

    Directory of Open Access Journals (Sweden)

    Nuri Balta

    2016-04-01

    Full Text Available Students’ attitudes and approaches to physics problem solving can impact how well they learn physics and how successful they are in solving physics problems. Prior research in the U.S. using a validated Attitude and Approaches to Problem Solving (AAPS survey suggests that there are major differences between students in introductory physics and astronomy courses and physics experts in terms of their attitudes and approaches to physics problem solving. Here we discuss the validation, administration, and analysis of data for the Turkish version of the AAPS survey for high school and university students in Turkey. After the validation and administration of the Turkish version of the survey, the analysis of the data was conducted by grouping the data by grade level, school type, and gender. While there are no statistically significant differences between the averages of various groups on the survey, overall, the university students in Turkey were more expertlike than vocational high school students. On an item by item basis, there are statistically differences between the averages of the groups on many items. For example, on average, the university students demonstrated less expertlike attitudes about the role of equations and formulas in problem solving, in solving difficult problems, and in knowing when the solution is not correct, whereas they displayed more expertlike attitudes and approaches on items related to metacognition in physics problem solving. A principal component analysis on the data yields item clusters into which the student responses on various survey items can be grouped. A comparison of the responses of the Turkish and American university students enrolled in algebra-based introductory physics courses shows that on more than half of the items, the responses of these two groups were statistically significantly different, with the U.S. students on average responding to the items in a more expertlike manner.

  11. Surveying Turkish high school and university students' attitudes and approaches to physics problem solving

    Science.gov (United States)

    Balta, Nuri; Mason, Andrew J.; Singh, Chandralekha

    2016-06-01

    Students' attitudes and approaches to physics problem solving can impact how well they learn physics and how successful they are in solving physics problems. Prior research in the U.S. using a validated Attitude and Approaches to Problem Solving (AAPS) survey suggests that there are major differences between students in introductory physics and astronomy courses and physics experts in terms of their attitudes and approaches to physics problem solving. Here we discuss the validation, administration, and analysis of data for the Turkish version of the AAPS survey for high school and university students in Turkey. After the validation and administration of the Turkish version of the survey, the analysis of the data was conducted by grouping the data by grade level, school type, and gender. While there are no statistically significant differences between the averages of various groups on the survey, overall, the university students in Turkey were more expertlike than vocational high school students. On an item by item basis, there are statistically differences between the averages of the groups on many items. For example, on average, the university students demonstrated less expertlike attitudes about the role of equations and formulas in problem solving, in solving difficult problems, and in knowing when the solution is not correct, whereas they displayed more expertlike attitudes and approaches on items related to metacognition in physics problem solving. A principal component analysis on the data yields item clusters into which the student responses on various survey items can be grouped. A comparison of the responses of the Turkish and American university students enrolled in algebra-based introductory physics courses shows that on more than half of the items, the responses of these two groups were statistically significantly different, with the U.S. students on average responding to the items in a more expertlike manner.

  12. The backtracking survey propagation algorithm for solving random K-SAT problems

    Science.gov (United States)

    Marino, Raffaele; Parisi, Giorgio; Ricci-Tersenghi, Federico

    2016-10-01

    Discrete combinatorial optimization has a central role in many scientific disciplines, however, for hard problems we lack linear time algorithms that would allow us to solve very large instances. Moreover, it is still unclear what are the key features that make a discrete combinatorial optimization problem hard to solve. Here we study random K-satisfiability problems with K=3,4, which are known to be very hard close to the SAT-UNSAT threshold, where problems stop having solutions. We show that the backtracking survey propagation algorithm, in a time practically linear in the problem size, is able to find solutions very close to the threshold, in a region unreachable by any other algorithm. All solutions found have no frozen variables, thus supporting the conjecture that only unfrozen solutions can be found in linear time, and that a problem becomes impossible to solve in linear time when all solutions contain frozen variables.

  13. Employee problems and their consequences in the technology industry: evidence from surveys and counseling records.

    Science.gov (United States)

    Wang, Ching-Wen; Lin, Po-Chang; Sha, Chyuan

    2014-06-01

    To support employees' work and health, organizations should help employees cope with common problems. Previous studies have focused primarily on work-related problems across multiple industries rather than on evaluating industry-specific issues. Here, two approaches identified common work and non-work employee problems in the technology industry with the strongest correlations with psychosomatic health and life satisfaction. Study 1 used questionnaires to identify the problems that were perceived as the most frequent by lower-level employees (N = 355) working in the technology industry. Study 2 evaluated employees' coping behaviors by analyzing (with permission) counseling records collected from an employee assistance service company (N = 276). Employees reported a variety of problems; work problems were the only problems (of the top 5 problems) reported in both studies. Several problems emerged in the counseling records (e.g., legal issues, career development, family and marriage problems, and emotional problems) but not in the surveys. Future research should apply these observations to develop scales for measuring employee stressors.

  14. A nonparametric approach to the sample selection problem in survey data

    NARCIS (Netherlands)

    Vazquez-Alvarez, R.

    2001-01-01

    Responses to economic surveys are usually noisy. Item non-response, as a particular type of censored data, is a common problem for key economic variables such as income and earnings, consumption or accumulated assets. If such non-response is non-random, the consequence can be a bias in the results o

  15. Conceptualizing childhood health problems using survey data: a comparison of key indicators

    Directory of Open Access Journals (Sweden)

    Miller Anton R

    2007-12-01

    Full Text Available Abstract Background Many definitions are being used to conceptualize child health problems. With survey data, commonly used indicators for identifying children with health problems have included chronic condition checklists, measures of activity limitations, elevated service use, and health utility thresholds. This study compares these different indicators in terms of the prevalence rates elicited, and in terms of how the subgroups identified differ. Methods Secondary data analyses used data from the National Longitudinal Survey of Children and Youth, which surveyed a nationally representative sample of Canadian children (n = 13,790. Descriptive analyses compared healthy children to those with health problems, as classified by any of the key indicators. Additional analyses examined differences between subgroups of children captured by a single indicator and those described as having health problems by multiple indicators. Results This study demonstrates that children captured by any of the indicators had poorer health than healthy children, despite the fact that over half the sample (52.2% was characterized as having a health problem by at least one indicator. Rates of child ill health differed by indicator; 5.6% had an activity limitation, 9.2% exhibited a severe health difficulty, 31.7% reported a chronic condition, and 36.6% had elevated service use. Further, the four key indicators captured different types of children. Indicator groupings differed on child and socio-demographic factors. Compared to children identified by more than one indicator, those identified only by the severe health difficulty indicator displayed more cognitive problems (p Conclusion We provide information useful to researchers when selecting indicators from survey data to identify children with health problems. Researchers and policy makers need to be aware of the impact of such definitions on prevalence rates as well as on the composition of children classified as

  16. Literature survey and documentation on organic solid deposition problem. Status report

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Ting-Horng

    1993-12-01

    Organic solid deposition is often a major problem in petroleum production and processing. Recently, this problem has attracted more attention because operating costs have become more critical to the profit of oil production. Also, in miscible gas flooding, asphaltene deposition often occurs in the wellbore region after gas breakthrough and causes plugging. The organic deposition problem is particularly serious in offshore oil production. Cooling of crude oil when it flows through long-distance pipelines under sea water may cause organic deposition in the pipeline and result in plugging. NIPER`s Gas EOR Research Project has been devoted to the study of the organic solid deposition problem for three years. NIPER has received many requests for technical support. Recently, the DeepStar project committee on thermo-technology development and standardization has asked NIPER to provide them with NIPER`s expertise and experience. To assist the oil industry, NIPER is preparing a state-of-the-art review on the technical development for the organic deposition problem. In the first quarter, this project has completed a literature survey and documentation. total of 258 publications (114 for wax, 124 for asphaltene, and 20 for related subjects) were collected and categorized. This literature survey was focused on the two subjects: wax and asphaltene. The subjects of bitumen, asphalt, and heavy oil are not included. Also, the collected publications are mostly related to production problems.

  17. Survey of the research on dynamic weapon-target assignment problem

    Institute of Scientific and Technical Information of China (English)

    Cai Huaiping; Liu Jingxu; Chen Yingwu; Wang Hao

    2006-01-01

    The basic concepts and models of weapon-target assignment (WTA) are introduced and the mathematical nature of the WTA models is also analyzed. A systematic survey of research on WTA problem is provided. The present research on WTA is focused on models and algorithms. In the research on models of WTA, the static WTA models are mainly studied and the dynamic WTA models are not fully studied in deed. In the research on algorithms of WTA, the intelligent algorithms are often used to solve the WTA problem. The small scale of static WTA problems has been solved very well, however, the large scale of dynamic WTA problems has not been solved effectively so far. Finally, the characteristics of dynamic WTA are analyzed and directions for the future research on dynamic WTA are discussed.

  18. Adaptive search techniques for problems in vehicle routing, part I: A survey

    Directory of Open Access Journals (Sweden)

    Kritzinger Stefanie

    2015-01-01

    Full Text Available Research in the field of vehicle routing often focused on finding new ideas and concepts in the development of fast and efficient algorithms for an improved solution process. Early studies introduce static tailor-made strategies, but trends show that algorithms with generic adaptive policies - which emerged in the past years - are more efficient to solve complex vehicle routing problems. In this first part of the survey, we present an overview of recent literature dealing with adaptive or guided search techniques for problems in vehicle routing.

  19. Professional Problems Experienced by Information Technology Teachers and Suggested Solutions: Longitudinal Survey

    OpenAIRE

    Hafize Keser; Levent Çetinkaya

    2013-01-01

    The study aimed to determine the opinions of teacher candidates in the fourth year of Computer Education & Instructional Technologies department (CEIT) on the Problems Experienced by Information Technology (IT) Teachers and Suggested Solutions and it has been designed in case study routine taking place within qualitative research tradition and in a longitudinal survey model. The final year IT teacher candidates receiving education in Ankara University Educational Sciences Faculty CEIT departm...

  20. Applications of numerical optimization methods to helicopter design problems - A survey

    Science.gov (United States)

    Miura, H.

    1985-01-01

    A survey of applications of mathematical programming methods is used to improve the design of helicopters and their components. Applications of multivariable search techniques in the finite dimensional space are considered. Five categories of helicopter design problems are considered: (1) conceptual and preliminary design, (2) rotor-system design, (3) airframe structures design, (4) control system design, and (5) flight trajectory planning. Key technical progress in numerical optimization methods relevant to rotorcraft applications are summarized.

  1. Applications of numerical optimization methods to helicopter design problems: A survey

    Science.gov (United States)

    Miura, H.

    1984-01-01

    A survey of applications of mathematical programming methods is used to improve the design of helicopters and their components. Applications of multivariable search techniques in the finite dimensional space are considered. Five categories of helicopter design problems are considered: (1) conceptual and preliminary design, (2) rotor-system design, (3) airframe structures design, (4) control system design, and (5) flight trajectory planning. Key technical progress in numerical optimization methods relevant to rotorcraft applications are summarized.

  2. Problem drinking and physical intimate partner violence against women: evidence from a national survey in Uganda

    Directory of Open Access Journals (Sweden)

    Tumwesigye Nazarius

    2012-06-01

    Full Text Available Abstract Background Problem drinking has been identified as a major risk factor for physical intimate partner violence (PIPV in many studies. However, few studies have been carried on the subject in developing countries and even fewer have a nationwide perspective. This paper assesses the patterns and levels of PIPV against women and its association with problem drinking of their sexual partners in a nationwide survey in Uganda. Methods The data came from the women’s dataset in the Uganda Demographic and Health Survey of 2006. Problem drinking among sexual partners was defined by women’s reports that their partner got drunk sometimes or often and served as the main independent variable while experience of PIPV by the women was the main dependent variable. In another aspect problem drinking was treated an ordinal variable with levels ranging from not drinking to getting drunk often. A woman was classified as experiencing PIPV if her partner pushed or shook her; threw something at her; slapped her; pushed her with a fist or a harmful object; kicked or dragged her, tried to strangle or burn her; threatened/attacked her with a knife/gun or other weapon. General chi-square and chi-square for trend analyses were used to assess the significance of the relationship between PIPV and problem drinking. Multivariate analysis was applied to establish the significance of the relationship of the two after controlling for key independent factors. Results Results show that 48% of the women had experienced PIPV while 49.5% reported that their partners got drunk at least sometimes. The prevalence of both PIPV and problem drinking significantly varied by age group, education level, wealth status, and region and to a less extent by occupation, type of residence, education level and occupation of the partner. Women whose partners got drunk often were 6 times more likely to report PIPV (95% CI: 4.6-8.3 compared to those whose partners never drank alcohol. The

  3. Problem-based learning in pharmacology:a survey of department heads in Taiwan, China

    Institute of Scientific and Technical Information of China (English)

    Ying-tung LAU

    2004-01-01

    Problem-based learning (PBL) requires active student participation and the use of clinical cases as a trigger to learn within a given area. It has gained much attention as a pedagogic alternative in the course of reform in medica education due to information overload. From discipline-based consideration, it is interesting to understand the views of department heads of pharmacology about implementing PBL for their medical students. According to a general survey from the heads of the department of pharmacology across medical schools in Taiwan, we found that although serious reservation about the approach remains, many departments indeed look forward to including PBL component in their pharmacology curriculum.

  4. A survey of low-level radioactive waste treatment methods and problem areas associated with commercial nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Jolley, R.L.; Rodgers, B.R.

    1987-01-01

    A survey was made (June 1985) of technologies that were currently being used, those that had been discontinued, and those that were under consideration for treatment of low-level radioactive waste from the commercial nuclear power plants in the United States. The survey results included information concerning problems areas, areas needing research and development, and the use of mobile treatment facilities.

  5. Multi-Robot Path-Planning Problem for a Heavy Traffic Control Application: A Survey

    Directory of Open Access Journals (Sweden)

    Ebtehal Turki Saho Alotaibi

    2016-06-01

    Full Text Available This survey looked at the methods used to solve multi-autonomous vehicle path-planning for an application of heavy traffic control in cities. Formally, the problem consisted of a graph and a set of robots. Each robot has to reach its destination in the minimum time and number of movements, considering the obstacles and other robots’ paths, hence, the problem is NP-hard. The study found that decoupled centralised approaches are the most relevant approaches for an autonomous vehicle path-planning problem for three reasons: (1 a city is a large environment and coupled centralised approaches scale weakly, (2 the overhead of a coupled decentralised approach to achieve the global optimal will affect the time and memory of the other robots, which is not important in a city configuration and (3 the coupled approaches suppose that the number of robots is defined before they start to find the paths and resolve collisions, while in a city, any car can start at any time and hence, each car should work individually and resolve collisions as they arise. In addition, the study reviewed four decoupled centralised techniques to solve the problem: multi-robot path-planning rapidly exploring random tree (MRRRT, push and swap (PAS, push and rotate (PAR and the Bibox algorithm. The experiments showed that MRRRT is the best for exploring any search space and optimizing the solution. On the other hand, PAS, PAR and Bibox are better in terms of providing a complete solution for the problem and resolving collisions in significantly much less time, the analysis, however, shows that a wider class of solvable instances are excluded from PAS and PAR domain. In addition, Bibox solves a smaller class than the class solved by PAS and PAR in less time, in the worst case, and with a shorter path than PAS and PAR.

  6. Self-reported occupational health problems among dentists in Himachal Pradesh, India: A descriptive survey

    Directory of Open Access Journals (Sweden)

    Vinay Kumar Bhardwaj

    2013-01-01

    Full Text Available Background: Occupation-related health problems are associated with risk or danger as a consequence of the nature of working conditions. Unique working conditions in dentistry can affect the health of dentists. Aim: The aim of this study is to collect information from dentists in Himachal Pradesh concerning common occupation-related health problems, their knowledge and the precautions they commonly took to avoid such problems. Settings and Design: Questionnaire survey conducted on a systematic random sample of 465 dentists among 1395 dentists registered in the state dental council. Materials and Methods: Questionnaires were sent by mail in September 2011 to systematic random sample of 465 dentists. The dentists were asked to complete the questionnaire and return it by mail using the stamped addressed envelope provided. Statistically Analysis Used: The data were analyzed using the software Statistical Package for the Social Sciences version 15 (SPSS Inc., Chicago. Z test was used for statistical comparison. Results: The response rate from the dentists was 81.7%. The most common problem experienced was musculoskeletal pain (46.1% followed by allergic dermatitis of the hands (7.6%. Nearly, all of the respondent dentists wore gloves (100% and face masks (97.4% during work. 1/10 th respondents reported that they had received instructions or training through interactive workshops in occupational health and safety. Conclusions: There seems to be a substantial demand for continuing education on occupational health and safety among dentists in Himachal Pradesh. Hence, more emphasis on occupational health and safety is put into dental training with more continuing education activities on occupational health and safety to practicing dentists.

  7. The coverage problem in video-based wireless sensor networks: a survey.

    Science.gov (United States)

    Costa, Daniel G; Guedes, Luiz Affonso

    2010-01-01

    Wireless sensor networks typically consist of a great number of tiny low-cost electronic devices with limited sensing and computing capabilities which cooperatively communicate to collect some kind of information from an area of interest. When wireless nodes of such networks are equipped with a low-power camera, visual data can be retrieved, facilitating a new set of novel applications. The nature of video-based wireless sensor networks demands new algorithms and solutions, since traditional wireless sensor networks approaches are not feasible or even efficient for that specialized communication scenario. The coverage problem is a crucial issue of wireless sensor networks, requiring specific solutions when video-based sensors are employed. In this paper, it is surveyed the state of the art of this particular issue, regarding strategies, algorithms and general computational solutions. Open research areas are also discussed, envisaging promising investigation considering coverage in video-based wireless sensor networks.

  8. Link-prediction to tackle the boundary specification problem in social network surveys

    Science.gov (United States)

    De Wilde, Philippe; Buarque de Lima-Neto, Fernando

    2017-01-01

    Diffusion processes in social networks often cause the emergence of global phenomena from individual behavior within a society. The study of those global phenomena and the simulation of those diffusion processes frequently require a good model of the global network. However, survey data and data from online sources are often restricted to single social groups or features, such as age groups, single schools, companies, or interest groups. Hence, a modeling approach is required that extrapolates the locally restricted data to a global network model. We tackle this Missing Data Problem using Link-Prediction techniques from social network research, network generation techniques from the area of Social Simulation, as well as a combination of both. We found that techniques employing less information may be more adequate to solve this problem, especially when data granularity is an issue. We validated the network models created with our techniques on a number of real-world networks, investigating degree distributions as well as the likelihood of links given the geographical distance between two nodes. PMID:28426826

  9. Status of problem based learning in postgraduate anesthesia teaching: A cross-sectional survey

    Directory of Open Access Journals (Sweden)

    Geetanjali Chilkoti

    2015-01-01

    Full Text Available Background: Anesthesia is a specialized branch of medicine with a very narrow margin of error. Incorporation of problem-based learning (PBL in anesthesia post-graduate (PG teaching enhances the critical thinking and problem-solving skills. It also helps in developing a broader prospective of clinical case scenarios. Case based discussions (CBD are most widely practiced out of all PBL methods in anesthesia PG teaching. Materials and Methods: We conducted an anonymous questionnaire based, cross-sectional survey among 62 anesthesia residents from various medical institutions in a city of Delhi, India. We aimed to assess the current status of PBL by assessing the student satisfaction with CBD in anesthesia PG teaching, educational objectives accomplished with CBD and effectiveness of teaching curriculum in PG teaching with suggested modifications, if any. Result and Conclusion: We observed that CBD is lacking in many important key areas of PBL e.g., formulation of objectives, communication on the content and direction of PBL, facilitation skills, supplementation of inadequacies of CBD. However, CBD seems to be a valid method of PBL in terms of the educational objectives accomplished with it but increased motivation for learning is required. Majority of the students felt that PG teaching curriculum should be centralized, with increased emphasis on open interactive sessions regarding its effectiveness.

  10. The Lagrange reduction of the N-body problem, a survey

    CERN Document Server

    Chenciner, Alain

    2011-01-01

    In his fondamental "Essay on the 3-body problem", Lagrange, well before Jacobi's "reduction of the node", carries out the first complete reduction of symetries. Discovering the so-called homographic motions, he shows that they necessarily take place in a fixed plane. The true nature of this reduction is revealed if one considers the n-body problem in an euclidean space of arbitrary dimension. The actual dimension of the ambiant space then appears as a constraint, namely the angular momentum bivector's degeneracy. The main part of this survey is a detailed description of the results obtained in a joint paper with Alain Albouy published in french (Inventiones 1998): for a non homothetic homographic motion to exist, it is necessary that the space of motion be even dimensional. Two cases are possible: either the configuration is "central" (that is a critical point of the potential among configurations with a given moment of inertia) and the space where the motion takes place is endowed with an hermitian structure...

  11. Do teachers have more health problems? Results from a French cross-sectional survey

    Directory of Open Access Journals (Sweden)

    Nerrière Eléna

    2006-04-01

    Full Text Available Abstract Background Although only a few studies have been published on teachers' health, certain ideas are widely accepted, such as for example, the preconceived notion that teachers suffer from an excessively high rate of mental health problems. The objective of this study is to compare teachers' mental and physical health to that of a control group. Methods A cross-sectional postal survey was conducted among a sample of 3,679 teachers and 1,817 non-teachers aged 20 to 60 years old. Results No lifetime prevalence of any psychiatric disorder (with the exception of undifferentiated somatoform disorder in men or mean scores of psychological distress were found to be significantly higher in teachers. However, multiple analyses, adjusted for all confounding variables, revealed a higher risk of lifetime anxiety disorders in male teachers. On the other hand, significant differences were observed for some physical ailments: a higher lifetime prevalence of rhinopharyngitis/laryngitis in both male and female teachers, of conjunctivitis and lower urinary tract infection in male teachers and of bronchitis, eczema/dermatitis and varicose veins in female teachers. No significant difference was found for chronic pain between the two groups. Conclusion Teachers do not seem to have poorer mental health. However, their physical condition is characterized by a higher prevalence of health problems related to the ENT tract, and to a lesser extent, depending on the gender, to skin, eyes, legs and lower urinary tract.

  12. Insulin-taking behavior and memory problems among people with diabetes in five countries: findings from a web survey

    Directory of Open Access Journals (Sweden)

    Brod M

    2014-11-01

    Full Text Available Meryl Brod,1 Kathryn M Pfeiffer,1 Kasper Mandel Clausen,2 Rasmus Skovgaard,3 Jens Harald Kongsø21The Brod Group, Mill Valley, CA, USA; 2Novo Nordisk A/S, Global Development, Søborg, Denmark; 3Novo Nordisk Canada Inc., Market Access and External Affairs, Mississauga, ON, CanadaBackground: The purpose of this study was to explore memory problems that result in nonadherence with insulin treatment in people with diabetes from five countries (USA, UK, Canada, Germany, People's Republic of China, as well as the impact of memory problems on physical and emotional functioning, work, and diabetes management.Methods: A web survey was conducted in five countries with diabetic patients taking insulin. In three countries, focus groups and interviews with 64 patients treated with insulin were used to develop survey items. Three types of memory problems associated with insulin-taking were examined: unintentionally forgetting (UF, questioning whether or not one took a dose (QT, and questioning how much was taken (QD over the past month. The survey focused on respondents who had experienced at least one of these memory problems.Results: The incidence of memory problems was high; 93.3% of those eligible for the survey reported having had a memory issue in the previous month. A total of 1,754 patients with type 1 or type 2 diabetes completed the web survey. Sixty-eight percent of respondents reported a UF, 79.6% a QT, and 54.7% a QD. A total of 35.9% of respondents reported experiencing all three memory problems. Respondents reported that memory problems had negative impacts on physical and emotional functioning, as well as time and functioning at work. Many respondents indicated that memory problems led them to taking additional blood glucose measurements and contacting physicians/health care professionals. The results demonstrated some significant differences across countries, some significant variation across patient demographics and disease characteristics

  13. Scoping survey of perceived concerns, issues, and problems for near-surface disposal of FUSRAP waste

    Energy Technology Data Exchange (ETDEWEB)

    Robinson, J.E.; Gilbert, T.L.

    1982-12-01

    This report is a scoping summary of concerns, issues, and perceived problems for near-surface disposal of radioactive waste, based on a survey of the current literature. Near-surface disposal means land burial in or within 15 to 20 m of the earth's surface. It includes shallow land burial (burial in trenches, typically about 6 m deep with a 2-m cap and cover) and some intermediate-depth land burial (e.g., trenches and cap similar to shallow land burial, but placed below 10 to 15 m of clean soil). Proposed solutions to anticipated problems also are discussed. The purpose of the report is to provide a better basis for identifying and evaluating the environmental impacts and related factors that must be analyzed and compared in assessing candidate near-surface disposal sites for FUSRAP waste. FUSRAP wastes are of diverse types, and their classification for regulatory purposes is not yet fixed. Most of it may be characterized as low-activity bulk solid waste, and is similar to mill tailings, but with somewhat lower average specific activity. It may also qualify as Class A segregated waste under the proposed 10 CFR 61 rules, but the parent radionuclides of concern in FUSRAP (primarily U-238 and Th-232) have longer half-lives than do the radionuclides of concern in most low-level waste. Most of the references reviewed deal with low-level waste or mill tailings, since there is as yet very little literature in the public domain on FUSRAP per se.

  14. Perceived problems with computer gaming and internet use among adolescents: measurement tool for non-clinical survey studies

    OpenAIRE

    Holstein, Bjørn E.; Pedersen, Trine Pagh; Bendtsen, Pernille; Madsen, Katrine Rich; Meilstrup, Charlotte Riebeling; Nielsen, Line; Rasmussen, Mette

    2014-01-01

    Background Existing instruments for measuring problematic computer and console gaming and internet use are often lengthy and often based on a pathological perspective. The objective was to develop and present a new and short non-clinical measurement tool for perceived problems related to computer use and gaming among adolescents and to study the association between screen time and perceived problems. Methods Cross-sectional school-survey of 11-, 13-, and 15-year old students in thirteen schoo...

  15. The Problems in Rural English Teaching and the Optimization Path: A Study Based on the Chinese General Social Survey Data

    OpenAIRE

    Tan, Hong

    2014-01-01

    The new curriculum, new ideas and new requirements concerning English teaching have made the rural English teaching face unprecedented challenges. There are many problems contributing to the poor effect of rural English teaching, such as outdated teaching equipment, unreasonable curriculum design, insufficient teaching staff, asymmetrical teaching content, family education and students' personal problems. Based on the Chinese General Social Survey data, it is found that in terms of English re...

  16. A Survey on Renewable Energy Development in Malaysia: Current Status, Problems and Prospects

    Directory of Open Access Journals (Sweden)

    Alam Syed Shah

    2016-05-01

    Full Text Available Energy demand in Malaysia is increasing over seven per cent a year, while forty per cent of the energy is supplied from conventional fossil fuel. However, a number of social barriers have mired the social acceptance of renewable energy among the users. This study investigates the current status of renewable energy, problems and future outlook of renewable energy in Malaysia. A total of 200 respondents were surveyed from Klang Valley in Malaysia. Majority of the respondents use energy to generate electricity. Although some respondents reported using solar energy, there is lack of retail availability for solar energy. The findings show that limited information on renewable energy technologies, lack of awareness, and limited private sector engagement emerged as major barriers to sustainable renewable energy development. In addition, the respondents suggest for increasing policy support from the government to make information more accessible to mass users, provide economic incentives to investors and users, and promote small-community based renewable energy projects. The study suggests that the government begin small scale projects to build awareness on renewable energy, while academically, higher learning institutions include renewable energy syllabus in their academic curriculum. The study concluded that to have sustainable renewable energy development, government’s initiative, private sector engagement and users awareness must be given priority.

  17. A Survey on Renewable Energy Development in Malaysia: Current Status, Problems and Prospects

    Science.gov (United States)

    Alam, Syed Shah; Nor, Nor Fariza Mohd; Ahmad, Maisarah; Hashim, Nik Hazrul Nik

    2016-05-01

    Energy demand in Malaysia is increasing over seven per cent a year, while forty per cent of the energy is supplied from conventional fossil fuel. However, a number of social barriers have mired the social acceptance of renewable energy among the users. This study investigates the current status of renewable energy, problems and future outlook of renewable energy in Malaysia. A total of 200 respondents were surveyed from Klang Valley in Malaysia. Majority of the respondents use energy to generate electricity. Although some respondents reported using solar energy, there is lack of retail availability for solar energy. The findings show that limited information on renewable energy technologies, lack of awareness, and limited private sector engagement emerged as major barriers to sustainable renewable energy development. In addition, the respondents suggest for increasing policy support from the government to make information more accessible to mass users, provide economic incentives to investors and users, and promote small-community based renewable energy projects. The study suggests that the government begin small scale projects to build awareness on renewable energy, while academically, higher learning institutions include renewable energy syllabus in their academic curriculum. The study concluded that to have sustainable renewable energy development, government's initiative, private sector engagement and users awareness must be given priority.

  18. Help-seeking for emotional problems in major depression : findings of the 2006 Estonian health survey.

    Science.gov (United States)

    Kleinberg, Anne; Aluoja, Anu; Vasar, Veiko

    2013-08-01

    To study help-seeking among the general population and people with major depression. 12-month help-seeking for emotional problems was assessed in a cross-sectional 2006 Estonian Health Survey. Non-institutionalized individuals aged 18-84 years (n = 6,105) were interviewed. A major depressive episode was assessed using the Mini-International Neuropsychiatric Interview. The factors associated with help-seeking, received help, and health service use were analyzed. The prevalence of 12-month help-seeking for emotional symptoms was 4.8%. The rate of 12-month help-seeking in the depressed sample was 34.1%. Depressed people used non-mental health services 1.5-3 times more than non-depressed persons even when adjusted for the chronic somatic disorder. Only one third of depressed persons sought help, which was most of all associated with severity of depression. Underdiagnosis and undertreatment of depression leads to an increased use of expensive but non-specific health services by depressed persons.

  19. Prevalence of dental problems in recreational SCUBA divers: a pilot survey.

    Science.gov (United States)

    Ranna, V; Malmstrom, H; Yunker, M; Feng, C; Gajendra, S

    2016-11-04

    Objective To determine the prevalence of dental symptoms in recreational scuba divers and describe the distribution of these symptoms on the basis of diver demographics, diving qualifications and dive conditions during the episode of dental pain.Design A survey was designed and distributed through online social media platforms dedicated to scuba diving. A convenience sample of 100 recreational divers was obtained by this method.Main outcome measures The outcome measures of interest were: diver demographics, diving characteristics (level of certification, number of dives completed), occurrence of dental problems during a dive, and details of the episode.Results Forty-one percent of the respondents experienced dental symptoms during a dive. Barodontalgia was the most frequently experienced dental symptom during a dive.Conclusion Within the limits of the small sample size and online method of recruitment, the findings of this study suggest that a high proportion of recreational divers may experience dental symptoms during a dive. It would be meaningful to ensure that dental decay and damaged restorations are addressed before a dive and that the mouthpiece design be evaluated in case of complaints of temporomandibular discomfort during a dive.

  20. A Literature Survey for Earliness/Tardiness Scheduling Problems with Learning Effect

    Directory of Open Access Journals (Sweden)

    Mesut Cemil İŞLER

    2009-02-01

    Full Text Available When a task or work is done continuously, there will be an experience so following times needs of required resources (manpower, materials, etc. will be reduced. This learning curve described first by Wright. Wright determined how workmanship costs decreased while proceed plain increasing. This investigations correctness found consistent by plain producers. Learning effect is an effect that, works can be done in shorter time in the rate of repeat of work with repeating same or similar works in production process. Nowadays classical production systems adapted more acceptable systems with new approaches. Just in time production system (JIT philosophy is one of the most important production system philosophies. JIT which is known production without stock stands on using all product resources optimum. Minimization problem of Earliness/Tardiness finishing penalty, which we can describe Just in time scheduling, appeared by inspired from JIT philosophy. In this study, there is literature survey which directed to earliness/tardiness performance criteria and learning effect processing in scheduling and as a result of this it is obtained some establishing for literature.

  1. Anxiety disorders moderate the association between externalizing problems and substance use disorders: data from the National Comorbidity Survey-Revised.

    Science.gov (United States)

    Hofmann, Stefan G; Richey, J Anthony; Kashdan, Todd B; McKnight, Patrick E

    2009-05-01

    Anxiety disorders and externalizing problems are both associated with substance use disorders. However, the nature of this relationship remains unclear. To examine whether presence of an anxiety disorder changes the association between externalizing problems (conduct disorder, oppositional defiant disorder, and attention deficit hyperactivity disorder) and substance use disorders, we analyzed data from the National Comorbidity Survey-Replication, which is based on a nationally representative sample of 9282 English-speaking adults. Presence of externalizing problems was associated with an increased odds for alcohol abuse (OR: 6.7, CI: 5.6-8.1), alcohol dependence (OR: 7.6, CI: 5.9-9.6), substance abuse (OR: 9.9, CI: 8.1-12.2), and substance dependence (OR: 13.1, CI: 9.6-17.8). Similarly, anxiety disorders were associated with increased odds for substance use disorders. The highest association was found between post-traumatic stress disorder and substance use disorder (OR: 9.2, CI: 5.4-15.5). Individuals who met diagnostic criteria for an anxiety disorder and externalizing problems showed consistently and significantly lower odds for substance use problems than subjects with externalizing problems without a comorbid anxiety disorder. The results suggest that presence of any anxiety disorder reduces the association between externalizing problems and substance use disorders, possibly because the fear of bodily symptoms prevents individuals with externalizing problems from engaging in drug-seeking behaviors.

  2. Survey on Multi-Agent Collaborative Problem Solving%多Agent合作求解

    Institute of Scientific and Technical Information of China (English)

    张新良; 石纯一

    2003-01-01

    Multi-Agent Collaborative Problem Solving is one basic issue of the research of Multi-Agent Systen(MAS). In this paper we summarize some research work of Multi-Agent collaborative problem solving,expound thecharacteristic of Multi-Agnet collaborative problem solving,Model of Multi-Agent collaborative problem solving,pro-cess of solving、the application field of Multi-Agent collaborative problem solving and some challenge. Especially wediscuss the main models ,introduce the representative model including joint-intention,joint-commitment ,shared plan.

  3. Feasibility of a self-administered survey to identify primary care patients at risk of medication-related problems

    Directory of Open Access Journals (Sweden)

    Makowsky MJ

    2014-02-01

    Full Text Available Mark J Makowsky,1 Andrew J Cave,2 Scot H Simpson1 1Faculty of Pharmacy and Pharmaceutical Sciences, 2Department of Family Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada Background and objectives: Pharmacists working in primary care clinics are well positioned to help optimize medication management of community-dwelling patients who are at high risk of experiencing medication-related problems. However, it is often difficult to identify these patients. Our objective was to test the feasibility of a self-administered patient survey, to facilitate identification of patients at high risk of medication-related problems in a family medicine clinic. Methods: We conducted a cross-sectional, paper-based survey at the University of Alberta Hospital Family Medicine Clinic in Edmonton, Alberta, which serves approximately 7,000 patients, with 25,000 consultations per year. Adult patients attending the clinic were invited to complete a ten-item questionnaire, adapted from previously validated surveys, while waiting to be seen by the physician. Outcomes of interest included: time to complete the questionnaire, staff feedback regarding impact on workflow, and the proportion of patients who reported three or more risk factors for medication-related problems. Results: The questionnaire took less than 5 minutes to complete, according to the patient's report on the last page of the questionnaire. The median age (and interquartile range of respondents was 57 (45–69 years; 59% were women; 47% reported being in very good or excellent health; 43 respondents of 100 had three or more risk factors, and met the definition for being at high risk of a medication-related problem. Conclusions: Distribution of a self-administered questionnaire did not disrupt patients, or the clinic workflow, and identified an important proportion of patients at high risk of medication-related problems. Keywords: screening tool, pharmacists, primary

  4. Problems

    Directory of Open Access Journals (Sweden)

    Yekini Shehu

    2010-01-01

    real Banach space which is also uniformly smooth using the properties of generalized f-projection operator. Using this result, we discuss strong convergence theorem concerning general H-monotone mappings and system of generalized mixed equilibrium problems in Banach spaces. Our results extend many known recent results in the literature.

  5. How Big of a Problem is Analytic Error in Secondary Analyses of Survey Data?

    Science.gov (United States)

    West, Brady T; Sakshaug, Joseph W; Aurelien, Guy Alain S

    2016-01-01

    Secondary analyses of survey data collected from large probability samples of persons or establishments further scientific progress in many fields. The complex design features of these samples improve data collection efficiency, but also require analysts to account for these features when conducting analysis. Unfortunately, many secondary analysts from fields outside of statistics, biostatistics, and survey methodology do not have adequate training in this area, and as a result may apply incorrect statistical methods when analyzing these survey data sets. This in turn could lead to the publication of incorrect inferences based on the survey data that effectively negate the resources dedicated to these surveys. In this article, we build on the results of a preliminary meta-analysis of 100 peer-reviewed journal articles presenting analyses of data from a variety of national health surveys, which suggested that analytic errors may be extremely prevalent in these types of investigations. We first perform a meta-analysis of a stratified random sample of 145 additional research products analyzing survey data from the Scientists and Engineers Statistical Data System (SESTAT), which describes features of the U.S. Science and Engineering workforce, and examine trends in the prevalence of analytic error across the decades used to stratify the sample. We once again find that analytic errors appear to be quite prevalent in these studies. Next, we present several example analyses of real SESTAT data, and demonstrate that a failure to perform these analyses correctly can result in substantially biased estimates with standard errors that do not adequately reflect complex sample design features. Collectively, the results of this investigation suggest that reviewers of this type of research need to pay much closer attention to the analytic methods employed by researchers attempting to publish or present secondary analyses of survey data.

  6. How Big of a Problem is Analytic Error in Secondary Analyses of Survey Data?

    Science.gov (United States)

    West, Brady T.; Sakshaug, Joseph W.; Aurelien, Guy Alain S.

    2016-01-01

    Secondary analyses of survey data collected from large probability samples of persons or establishments further scientific progress in many fields. The complex design features of these samples improve data collection efficiency, but also require analysts to account for these features when conducting analysis. Unfortunately, many secondary analysts from fields outside of statistics, biostatistics, and survey methodology do not have adequate training in this area, and as a result may apply incorrect statistical methods when analyzing these survey data sets. This in turn could lead to the publication of incorrect inferences based on the survey data that effectively negate the resources dedicated to these surveys. In this article, we build on the results of a preliminary meta-analysis of 100 peer-reviewed journal articles presenting analyses of data from a variety of national health surveys, which suggested that analytic errors may be extremely prevalent in these types of investigations. We first perform a meta-analysis of a stratified random sample of 145 additional research products analyzing survey data from the Scientists and Engineers Statistical Data System (SESTAT), which describes features of the U.S. Science and Engineering workforce, and examine trends in the prevalence of analytic error across the decades used to stratify the sample. We once again find that analytic errors appear to be quite prevalent in these studies. Next, we present several example analyses of real SESTAT data, and demonstrate that a failure to perform these analyses correctly can result in substantially biased estimates with standard errors that do not adequately reflect complex sample design features. Collectively, the results of this investigation suggest that reviewers of this type of research need to pay much closer attention to the analytic methods employed by researchers attempting to publish or present secondary analyses of survey data. PMID:27355817

  7. How Big of a Problem is Analytic Error in Secondary Analyses of Survey Data?

    Directory of Open Access Journals (Sweden)

    Brady T West

    Full Text Available Secondary analyses of survey data collected from large probability samples of persons or establishments further scientific progress in many fields. The complex design features of these samples improve data collection efficiency, but also require analysts to account for these features when conducting analysis. Unfortunately, many secondary analysts from fields outside of statistics, biostatistics, and survey methodology do not have adequate training in this area, and as a result may apply incorrect statistical methods when analyzing these survey data sets. This in turn could lead to the publication of incorrect inferences based on the survey data that effectively negate the resources dedicated to these surveys. In this article, we build on the results of a preliminary meta-analysis of 100 peer-reviewed journal articles presenting analyses of data from a variety of national health surveys, which suggested that analytic errors may be extremely prevalent in these types of investigations. We first perform a meta-analysis of a stratified random sample of 145 additional research products analyzing survey data from the Scientists and Engineers Statistical Data System (SESTAT, which describes features of the U.S. Science and Engineering workforce, and examine trends in the prevalence of analytic error across the decades used to stratify the sample. We once again find that analytic errors appear to be quite prevalent in these studies. Next, we present several example analyses of real SESTAT data, and demonstrate that a failure to perform these analyses correctly can result in substantially biased estimates with standard errors that do not adequately reflect complex sample design features. Collectively, the results of this investigation suggest that reviewers of this type of research need to pay much closer attention to the analytic methods employed by researchers attempting to publish or present secondary analyses of survey data.

  8. Marketing Problems of Tourism Certifacated Hotel Managements- AField Survey in Bal›kesirProvince

    OpenAIRE

    Bedriye Tuncsiper; Mehmet Oguzhan ‹lban

    2006-01-01

    This study aims to searh marketing problems of hotel managements located in Balikesir, and the types of marketing applications applied by these managements. According to the results, the most important problems of these managements are: the difficulty of following technology,inadequte demand, difficulty of costumer satistification, cheating and confusing advertisements, excessive competition, and not having talented and educated salesmen. Against these problems, it is understood that service,...

  9. Incidence of health problems associated with tattooed skin: a nation-wide survey in German-speaking countries.

    Science.gov (United States)

    Klügl, Ines; Hiller, Karl-Anton; Landthaler, Michael; Bäumler, Wolfgang

    2010-08-01

    Millions of people are tattooed. However, the frequency of health problems is unknown. We performed an Internet survey in German-speaking countries. The provenance of tattooed participants (n = 3,411) was evenly distributed in Germany. The participants had many (28%; >4) and large tattoos (36%; >or=900 cm(2)). After tattooing, the people described skin problems (67.5%) or systemic reactions (6.6%). Four weeks after tattooing, 9% still had health problems. Six percent reported persistent health problems due to the tattoo, of which females (7.3%) were more frequently concerned than males (4.2%). Colored tattoos provoked more short-term skin (p = 0.003) or systemic (p = 0.0001) reactions than black tattoos. Also the size of tattoos and the age at the time of tattooing play a significant role in many health problems. Our results show that millions of people in the Western world supposedly have transient or persisting health problems after tattooing. Owing to the large number and size of the tattoos, tattooists inject several grams of tattoo colorants into the skin, which partly spread in the human body and stay for a lifetime. The latter might cause additional health problems in the long term. Copyright 2010 S. Karger AG, Basel.

  10. Associations between yoga practice and joint problems: a cross-sectional survey among 9151 Australian women.

    Science.gov (United States)

    Lauche, Romy; Schumann, Dania; Sibbritt, David; Adams, Jon; Cramer, Holger

    2017-07-01

    Yoga exercises have been associated with joint problems recently, indicating that yoga practice might be potentially dangerous for joint health. This study aimed to analyse whether regular yoga practice is associated with the frequency of joint problems in upper middle-aged Australian women. Women aged 62-67 years from the Australian Longitudinal Study on Women's Health (ALSWH) were questioned in 2013 whether they experienced regular joint pain or problems in the past 12 months and whether they regularly practiced yoga. Associations of joint problems with yoga practice were analysed using Chi-squared tests and multiple logistic regression modelling. Of 9151 women, 29.8% reported regular problems with stiff or painful joints, and 15.2, 11.9, 18.1 and 15.9% reported regular problems with shoulders, hips, knees and feet, respectively, in the past 12 months. Yoga was practiced sometimes by 10.1% and often by 8.4% of women. Practicing yoga was not associated with upper or lower limb joint problems. No association between yoga practice and joint problems has been identified. Further studies are warranted for conclusive judgement of benefits and safety of yoga in relation to joint problems.

  11. APPLICATION OF PARAMETER CONTINUATION METHOD FOR INVESTIGATION OF VIBROIMPACT SYSTEMS DYNAMIC BEHAVIOUR. PROBLEM STATE. SHORT SURVEY OF WORLD SCIENTIFIC LITERATURE

    Directory of Open Access Journals (Sweden)

    V.A. Bazhenov

    2014-12-01

    Full Text Available Authors in their works study vibroimpact system dynamic behaviour by numerical parametric continuation technique combined with shooting and Newton-Raphson’s methods. The technique is adapted to two-mass two-degree-of-freedom vibroimpact system under periodic excitation. Impact is simulated by nonlinear contact interaction force based on Hertz’s contact theory. Stability or instability of obtained periodic solutions is determined by monodromy matrix eigenvalues (multipliers based on Floquet’s theory. In the present paper we describe the state of problem of parameter continuation method using for nonlinear tasks solution. Also we give the short survey of numerous contemporary literature in English and Russian about parameter continuation method application for nonlinear problems. This method is applied for vibroimpact problem solving more rarely because of the difficulties connected with repeated impacts.

  12. Radiometric survey in mammography: problems and challenges; Levantamento radiometrico em mamografia: problemas e desafios

    Energy Technology Data Exchange (ETDEWEB)

    Navarro, M.V.T.; Navarro, V.C.C.; Garcia, I.F.M.; Ferreira, M.J.; Macedo, E.M., E-mail: navarro@ifba.edu.br [Instituto Federal da Bahia (LABPROSAUD/IFBA), Salvador, BA (Brazil). Laboratorio de Produtos para a Saude

    2015-07-01

    In addition to being mandatory, the radiometric survey is a necessity, especially in the Brazilian reality with the construction of smaller and smaller rooms. However, calibration conditions, the instrumentation and its use, can produce underestimated factors. Measures made at Labprosaud/IFBA, with five different instruments and the ISO N 25 radiation quality, show the possibility of the values presented in the radiometric surveys are underestimated by up to 10 times. The results indicate the need for meters to be calibrated in ISO N qualities, in mammography energy range, in integrated dose mode and exposure times shorter or equal to 1 s. (author)

  13. [Mental Health, Emotional Suffering, Mental Problems and Disorders in Indigenous Colombians. Data From the National Mental Health Survey 2015].

    Science.gov (United States)

    Gómez-Restrepo, Carlos; Rincón, Carlos Javier; Urrego-Mendoza, Zulma

    2016-12-01

    Indigenous people represent 5% of the world population and one-third of the poor ones. Alcoholism rates, substance abuse problems, and mental disorders are shown to be higher than the general population. An analysis was made of the data from the National Mental Health Survey 2015. In this survey, it was asked if self-recognition as a native was according to the culture, the people, or physical features. A total of 902 indigenous people were surveyed, corresponding to 8.3% of the surveyed adult population. The majority (39.5%) lived in the Pacific region, with 23.7% Atlantic region, and 20% in the Eastern region. More than one-quarter (26.6%) reported a status of poverty, 31.7% spoke the language of their people, and 17.8% reported displacement due to violence. Mental health was defined as, "having good physical health, to eat, sleep and rest, by 42.9%. As regards problems and mental disorders, 8% reported excessive consumption and 7.9% a risk consumption of alcohol. As regards general psychopathology, measured by the (Self-reporting questionnaire) SRQ, 8.1% of the population had symptoms. The life prevalences of anxiety and depressive mental disorders were reported by 6.7% women and 8.4% men, and the associated risk factors that show higher risk were: aged between 18 to 44 years, not speaking the language of their people, living in Bogota, living in urban areas, and consuming psychoactive substances and tobacco. People who recognised themselves as indigenous have higher rates of displacement by violence, report problems and common mental disorders that are associated with factors consistent with loss of cultural characteristics. Copyright © 2016. Publicado por Elsevier España.

  14. Problems with the Big Five assessment in the World Values Survey

    DEFF Research Database (Denmark)

    Ludeke, Steven G.; Larsen, Erik Gahner

    2017-01-01

    Publicly-available data from the World Values Survey (WVS) is an extremely valuable resource for social scientists, serving as the basis for thousands of research publications. The most recent assessment (Wave 6) was the first to assess Big Five personality traits, and this data has already been...

  15. The Gaia-ESO Survey: A simple explanation for the Li-rich giant problem

    DEFF Research Database (Denmark)

    Casey, Andrew R.; Ruchti, G.; Masseron, T.;

    2016-01-01

    observed through the Gaia-ESO Survey. Our sample is one of the largest in the literature, and includes nine towards the CoRoT fields. We explore all mechanisms proposed to explain Li-rich giants. While the planet accretion scenario was presented to reconcile observations of Li-rich giants across the RGB...

  16. A survey of waterfowl problems in Alaska for the purpose of identifying research needs: Preliminary draft

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report highlights the many and varied problems facing the waterfowl resource of Alaska. Current waterfowl investigations and management programs aimed at...

  17. The First Survey for Abilities of Wavelets in Solving Optimal Control Problems by Embedding Methods

    Directory of Open Access Journals (Sweden)

    A. Fakharzadeh

    2007-06-01

    Full Text Available By a brief review on the applications of wavelets in solving optimal control problems, a multiresolution analysis for two dimensional Sobolev spaces and the square spline wavelets are considered. Regarding the density and approximation properties of these wavelets, for the first time, they are employed for solving optimal control problems by embedding method. Existence and the determination way for the solution are also discussed. Finally, the abilities of the new approach are explained by a numerical example and some comparisons

  18. Survey of Steiner Tree Problem%Steiner Tree问题的研究进展

    Institute of Scientific and Technical Information of China (English)

    郑莹; 王建新; 陈建二

    2011-01-01

    Steiner tree problems are classical NP problems,which have wide applications in many fields,such as computer network arrangement,circuit design, biological network analysis and so oa With the development of parameterized computation theory, parameterized Steiner tree problem has been proved fixed parameter solvable not only in undirected graph but also in directed case This paper firstly introduced the approximation algorithms and parameterized algorithms for Steiner tree problem in general graphs,then analysed the research situation for some special Steiner tree problems. Moreover, the vertex-weighted Steiner tree problem was also discussed. Finally,some further research directions on this problem were proposed.%Steiner树问题是经典的NP难解问题,在计算机网络布局、电路设计以及生物网络等领域都有很多应用.随着参数计算理论的发展,已经证明了无向图和有向图中的Steiner树问题都是固定参数可解的(FPT).介绍了无向图和有向图中Steiner树问题的近似算法和参数算法,分析了一些特殊Steiner树问题的研究现状,还讨论了顶点加权Steiner树问题的研究进展.最后,提出了该问题的进一步研究方向.

  19. Survey of Steiner Tree Problem%Steiner Tree问题的研究进展

    Institute of Scientific and Technical Information of China (English)

    郑莹; 王建新; 陈建二

    2011-01-01

    Steiner树问题是经典的NP难解问题,在计算机网络布局、电路设计以及生物网络等领域都有很多应用.随着参数计算理论的发展,已经证明了无向图和有向图中的Steiner树问题都是固定参数可解的(FPT).介绍了无向图和有向图中Steiner树问题的近似算法和参数算法,分析了一些特殊Steiner树问题的研究现状,还讨论了顶点加权Steiner树问题的研究进展.最后,提出了该问题的进一步研究方向.%Steiner tree problems are classical NP problems,which have wide applications in many fields,such as computer network arrangement,circuit design, biological network analysis and so on. With the development of parameterized computation theory, parameterized Steiner tree problem has been proved fixed parameter solvable not only in undirected graph but also in directed case This paper firstly introduced the approximation algorithms and parameterized algorithms for Steiner tree problem in general graphs,then analysed the research situation for some special Steiner tree problems. Moreover, the vertex-weighted Steiner tree problem was also discussed. Finally,some further research directions on this problem were proposed.

  20. Abduction of children by their parents: a survey of the problem.

    Science.gov (United States)

    Hegar, R L; Greif, G L

    1991-09-01

    On the basis of a survey of a non-representative national sample of 371 parents who sought help from missing children's organizations, this article provides a profile of families in which children were abducted by one of the parents. Abductors were described as less educated and less likely to be employed than searching parents. In this survey, three-fourths of abducted children were younger than seven years of age; most abductions involved a single child. Although the abducting parents tended to be male (55 percent, n = 205), the proportion of female abductors was higher than in previous research. Mothers whose children were kidnapped by the father described more violence in their marriages, more fault-related reasons for divorce, and more force used in the abduction than did fathers whose children were kidnapped by the mother. The different family and social experiences of these men and women are discussed, and implications for social work practice are explored.

  1. Consequences of non-vascular trans-femoral amputation: a survey of quality of life, prosthetic use and problems.

    Science.gov (United States)

    Hagberg, K; Brånemark, R

    2001-12-01

    Individuals with unilateral trans-femoral amputations due to non-vascular causes were studied in a mailed survey designed to investigate health-related quality of life (HRQL), prosthetic use and problems. The Swedish SF-36 Health Survey and a structured questionnaire designed for trans-femoral amputees were used. The series consisted of 97 subjects (60 men, 37 women), aged 20 to 69 years with a mean of 22 years since the amputation. Trauma was the cause of amputation in 55%, tumour in 35% and other causes in 10%. Ninety-two (92) subjects (95%) had a prosthesis and 80 (82%) used it daily. General HRQL was significantly lower than Swedish age- and gender-matched norms in all dimensions as measured by SF-36. Most frequently reported problems that had led to reduction in quality of life were heat/sweating in the prosthetic socket (72%), sores/skin irritation from the socket (62%), inability to walk in woods and fields (61%) and inability to walk quickly (59%). Close to half were troubled by stump pain (51%), phantom limb pain (48%), back pain (47%) and pain in the other leg (46%). One fourth considered themselves to have a poor or extremely poor overall situation. Transfemoral amputation, due to non-vascular causes, has an evident impact on quality of life and there are considerable problems related to the amputation and the prosthesis. Efforts to improve the physical and the psychological well-being for this group, with a long life expectancy, are needed.

  2. Use of ministers for a serious personal problem among African Americans: findings from the national survey of American life.

    Science.gov (United States)

    Chatters, Linda M; Mattis, Jacqueline S; Woodward, Amanda Toler; Taylor, Robert Joseph; Neighbors, Harold W; Grayman, Nyasha A

    2011-01-01

    This study examined use of ministers for assistance with a serious personal problem within a nationally representative sample of African Americans (National Survey of American Life-2001-2003). Different perspectives on the use of ministers-social stratification, religious socialization, and problem-oriented approach-were proposed and tested using logistic regression analyses with demographic, religious involvement, and problem type factors as predictors. Study findings supported religious socialization and problem-oriented explanations indicating that persons who are heavily invested in religious pursuits and organizations (i.e., women, frequent attenders) are more likely than their counterparts to use ministerial assistance. Contrary to expectations from the social stratification perspective, positive income and education effects indicated that higher status individuals were more likely to report use of ministers. Finally, problems involving bereavement are especially suited for assistance from ministers owing to their inherent nature (e.g., questions of ultimate meaning) and the extensive array of ministerial support and church resources that are available to address the issue.

  3. Relationships between problematic internet use and problem-gambling severity: findings from a high-school survey.

    Science.gov (United States)

    Yau, Yvonne H C; Pilver, Corey E; Steinberg, Marvin A; Rugle, Loreen J; Hoff, Rani A; Krishnan-Sarin, Suchitra; Potenza, Marc N

    2014-01-01

    With the popularity of Internet use among adolescents, there is concern that some youth may display problematic or addictive patterns of Internet use. Although excessive patterns of Internet use was considered for inclusion in the DSM-5 with pathological gambling and substance-use disorders in a category of addictive disorders, it was determined that more research was needed on Internet-use behaviors before such actions be further considered and possibly undertaken. The present study is the first to investigate whether at-risk/problematic Internet use (ARPIU) may moderate the strength of association between problem-gambling severity and gambling-related characteristics and health and well-being measures in adolescents. Survey data from 1884 Connecticut high-school student stratified by Internet use (ARPIU vs. non-ARPIU) were examined in bivariate analyses and logistic regression models. Gambling-related characteristics and health and well-being measures were mostly positively associated with problem-gambling severity in both Internet use groups. Interaction odds ratio revealed that the strength of the associations between problem-gambling severity and marijuana, alcohol and caffeine use were stronger amongst the non-ARPIU compared to the ARPIU group, suggesting that the relationships between these substance use behaviors and problem gambling may be partially accounted for by ARPIU. Future studies should examine the extent to which preventative interventions targeting both problematic Internet use and problem gambling may synergistically benefit measures of health and reduce risk-taking behaviors in adolescence.

  4. Sustained adoption of an evidence-based treatment: a survey of clinicians certified in problem-solving therapy.

    Science.gov (United States)

    Crabb, Rebecca M; Areán, Patricia A; Hegel, Mark T

    2012-01-01

    Training models that incorporate case supervision in addition to didactic instruction appear to be effective in maximizing clinicians' proficiency in evidence-based treatments (EBTs). However, it is unknown the extent to which these models promote sustained adoption of EBTs. We describe the results of an online survey on post-training utilization of an EBT, problem-solving therapy (PST), among 40 clinicians highly trained in PST. Seventy-five percent of the survey's 40 respondents reported that they continued to use PST in their clinical practices. Many PST-trained clinicians reported that they had modified the PST protocol in their clinical practices according to patient characteristics or preferences. Considering these results, we recommend emphasizing patient variability and treatment tailoring throughout the training process as a means for promoting clinicians' sustained adoption of EBTs.

  5. Application of Multi Criteria Decision Making approaches for personnel selection problem: A survey

    Directory of Open Access Journals (Sweden)

    Mahdi Khorami

    2015-05-01

    Full Text Available Personnel selection is the critical stage of human resource management (HRM. It is undeniable fact that qualified personnel is one of the necessary building blocks for organization success because improper personnel might cause many obstacles for an organization and dissipates it resource as time, effort, and money. Indeed, complexity and the important role of personnel selection problem require the application of robust and equitable methods. An effective, helpful, and reliable approach has been developed to deal with personnel selection problem is multi criteria decision making (MCDM methods. In this paper, we focus on the application of MCDM methods for personnel selection problem and review numerous international journal articles accessible on famous academic databases.

  6. Environmental Problems Related to Refractories --Some Discussions Based on Historical Surveys mainly in Japan

    Institute of Scientific and Technical Information of China (English)

    Kiyoshi Sugita

    2005-01-01

    Major environmental problems related to refractories are discussed based on their historical studies mostly in Japan. Those issues have been experienced in a wide range of industrial scenes, from processing raw materials, making refractories to relining furnaces, handling after-use refractories.The key substances dealt with in this paper include, for example, suspended particulate, SOx and other exhaust gaseous emissions, hexa-valent chromium, and dioxin. The measures so far taken to avoid or reduce their influences upon environments are described with some future problems to be tackled.

  7. Survey of development work and problems with different collection techniques of food waste; Kartlaeggning av utvecklingsarbete samt problem vid olika insamlingstekniker foer matavfall

    Energy Technology Data Exchange (ETDEWEB)

    Henriksson, Gunilla

    2010-07-01

    In accordance with Sweden's environmental objectives it has been decided that, by 2010, 35 per cent of all food waste shall be recovered through biological treatment. In order to get there, the problems regarding collection methods needs to be solved. There are several different collection systems to choose between, but at the present time there is no complete list of the methods and techniques available on the market. Lists of advantages and disadvantages with each system, of potential improvements, and of completed or ongoing development projects are also missing, and creating difficulties for municipalities and businesses which are planning on introducing a system. The goal with this study is to provide a survey of technical problems with different systems and to identify previous studies as well as new innovations within collection techniques. The expectation is that this work eventually will lead to improved collection systems. The study will cover existing collection techniques in households, large-scale kitchens, restaurants and grocery stores in Sweden. The study will only cover the so called hard parameters, i.e. primarily technical issues. The target group is on the one hand municipalities planning on starting collection of food waste and on the other hand all actors in the area, such as innovators, producers and suppliers as well as Waste Refinery's organizations. Soft issues such as issues regarding information and quality are not included. The system limits of this project span between the recycling equipment of homes and businesses to the food waste's treatment at the biological treatment plant. The methods that have been used in this project are: questionnaire survey to 133 municipalities that today are recycling food waste, telephone interviews with a number of biological treatment plants and innovators in the business, and Internet searching for relevant reports and studies in the field. The results show that the paper bag and the

  8. A Survey of the Isentropic Euler Vortex Problem Using High-Order Methods

    Science.gov (United States)

    Spiegel, Seth C.; Huynh, H. T.; DeBonis, James R.

    2015-01-01

    The flux reconstruction (FR) method offers a simple, efficient, and easy to implement method, and it has been shown to equate to a differential approach to discontinuous Galerkin (DG) methods. The FR method is also accurate to an arbitrary order and the isentropic Euler vortex problem is used here to empirically verify this claim. This problem is widely used in computational fluid dynamics (CFD) to verify the accuracy of a given numerical method due to its simplicity and known exact solution at any given time. While verifying our FR solver, multiple obstacles emerged that prevented us from achieving the expected order of accuracy over short and long amounts of simulation time. It was found that these complications stemmed from a few overlooked details in the original problem definition combined with the FR and DG methods achieving high-accuracy with minimal dissipation. This paper is intended to consolidate the many versions of the vortex problem found in literature and to highlight some of the consequences if these overlooked details remain neglected.

  9. Professional Problems Experienced by Information Technology Teachers and Suggested Solutions: Longitudinal Survey

    Science.gov (United States)

    Keser, Hafize; Cetinkaya, Levent

    2013-01-01

    The study aimed to determine the opinions of teacher candidates in the fourth year of Computer Education & Instructional Technologies department (CEIT) on the Problems Experienced by Information Technology (IT) Teachers and Suggested Solutions and it has been designed in case study routine taking place within qualitative research tradition and…

  10. Coincidence of Homophone Spelling Errors and Attention Problems in Schoolchildren: A Survey Study

    Science.gov (United States)

    Tsai, Li-Hui; Meng, Ling-Fu; Hung, Li-Yu; Chen, Hsin-Yu; Lu, Chiu-Ping

    2011-01-01

    This article examines the relationship between writing and attention problems and hypothesizes that homophone spelling errors coincide with attention deficits. We analyze specific types of attention deficits, which may contribute to Attention Deficits Hyperactivity Disorder (ADHD); rather than studying ADHD, however, we focus on the inattention…

  11. A survey of the literature on the multiple or parallel assembly Line balancing problem

    OpenAIRE

    Lusa García, Amaia

    2008-01-01

    This paper focuses on production systems that consist of multiple parallel assembly lines. The main literature contributions are briefly described and used to present a summary of the state of the art. The advantages and disadvantages of adopting multiple lines are discussed and the multiple assembly line balancing problem and its relevant characteristics are described. Peer Reviewed

  12. The linear quadratic optimal control problem for infinite dimensional systems over an infinite horizon - Survey and examples

    Science.gov (United States)

    Bensoussan, A.; Delfour, M. C.; Mitter, S. K.

    1976-01-01

    Available published results are surveyed for a special class of infinite-dimensional control systems whose evolution is characterized by a semigroup of operators of class C subscript zero. Emphasis is placed on an approach that clarifies the system-theoretic relationship among controllability, stabilizability, stability, and the existence of a solution to an associated operator equation of the Riccati type. Formulation of the optimal control problem is reviewed along with the asymptotic behavior of solutions to a general system of equations and several theorems concerning L2 stability. Examples are briefly discussed which involve second-order parabolic systems, first-order hyperbolic systems, and distributed boundary control.

  13. An Epidemiological and Clinical Survey of Infertility Problems in Henan Province

    Institute of Scientific and Technical Information of China (English)

    程立法; 王敏峥; 杨文秀; 钱伟; 王一鑫

    1993-01-01

    An epidemiological survey of fertility was carried out in two cities and five counties of Henan province in China. 1.96% of couples were found to have primary infertility (2.01% if 12 women with recurrent rrdscarraiges were included ). The etiology, was analysed in 321 couples with primary infertility selected from the sample, In these 321 couples there were malefactors implicated in 26.8% of couples, female factors in 49% and both female and malefactors in 24%. The most commonly identified factors were: Varicocele ( 10.9% ) and ovulations disorders ( 32.08% ) in male and female respectively.

  14. Survey of editors and reviewers of high-impact psychology journals: statistical and research design problems in submitted manuscripts.

    Science.gov (United States)

    Harris, Alex; Reeder, Rachelle; Hyun, Jenny

    2011-01-01

    The authors surveyed 21 editors and reviewers from major psychology journals to identify and describe the statistical and design errors they encounter most often and to get their advice regarding prevention of these problems. Content analysis of the text responses revealed themes in 3 major areas: (a) problems with research design and reporting (e.g., lack of an a priori power analysis, lack of congruence between research questions and study design/analysis, failure to adequately describe statistical procedures); (b) inappropriate data analysis (e.g., improper use of analysis of variance, too many statistical tests without adjustments, inadequate strategy for addressing missing data); and (c) misinterpretation of results. If researchers attended to these common methodological and analytic issues, the scientific quality of manuscripts submitted to high-impact psychology journals might be significantly improved.

  15. A survey of foot problems in community-dwelling older Greek Australians

    Directory of Open Access Journals (Sweden)

    Menz Hylton B

    2011-10-01

    Full Text Available Abstract Background Foot problems are common in older people and are associated with impaired mobility and quality of life. However, the characteristics of foot problems in older Australians for whom English is a second language have not been evaluated. Methods One hundred and four community-dwelling people aged 64 to 90 years with disabling foot pain (according to the case definition of the Manchester Foot Pain and Disability Index, or MFPDI were recruited from four Greek elderly citizens clubs in Melbourne, Australia. All participants completed a Greek language questionnaire consisting of general medical history, the Medical Outcomes Study Short-Form 36 (SF-36 questionnaire, the MFPDI, and specific questions relating to foot problems and podiatry service utilisation. In addition, all participants underwent a brief clinical foot assessment. Results The MFPDI score ranged from 1 to 30 (median 14, out of a total possible score of 34. Women had significantly higher total MFPDI scores and MFPDI subscale scores. The MFPDI total score and subscale scores were significantly associated with most of the SF-36 subscale scores. The most commonly reported foot problem was difficulty finding comfortable shoes (38%, and the most commonly observed foot problem was the presence of hyperkeratotic lesions (29%. Only 13% of participants were currently receiving podiatry treatment, and 40% stated that they required more help looking after their feet. Those who reported difficulty finding comfortable shoes were more likely to be female, and those who required more help looking after their feet were more likely to be living alone and have osteoarthritis in their knees or back. Conclusions Foot problems appear to be common in older Greek Australians, have a greater impact on women, and are associated with reduced health-related quality of life. These findings are broadly similar to previous studies in English-speaking older people in Australia. However, only a small

  16. Stress and mental health problems in 1st year medical students: a survey of two medical colleges in Kanpur, India

    Directory of Open Access Journals (Sweden)

    Shivendra Jena

    2015-01-01

    Full Text Available Background: Incidence of stress among medical students has been reported to be between high and very high. Medical students in pre-clinical phase are more likely to develop psychological distress than medical students in clinical phase. It may affect academic performance and lead to anxiety, depression and substance abuse. Methods: First year students of one government medical college and one private medical college of Kanpur, Uttar Pradesh, India, were surveyed to find out stress and mental health problems shortly after their admission. Results: The two colleges showed difference in the frequencies of a number of factors- current stress, sleep problem, sad mood, both parents working, parents giving sufficient time, non-participation in extra-curricular activities, sharing problem with their families, having break-up in a romantic relationship and poor relationships with classmates and roommate. More students of the government medical college reported to have current stress compared to the students of the private medical college. While all students of the government medical who had stress since admission did not recover from it, 55.56% of students of the private medical college recovered from it at the time of our survey. Conclusion: a Psychiatry Department of every medical college should be involved in screening 1st year students having stress and mental health problems and managing them. b Medical education should be imparted in more relaxed and fun filled manner to help students cope with the long and difficult course. [Int J Res Med Sci 2015; 3(1.000: 130-134

  17. Problems of the carless. Final report. [Analysis of 400 respondents in Buffalo, NY survey

    Energy Technology Data Exchange (ETDEWEB)

    Paaswell, R.E.; Recker, W.W.

    1976-06-01

    A detailed study of a larger group of the transportation disadvantaged--the carless--was carried out, incorporating an extensive personal survey of over 400 respondents in Buffalo, New York. Analysis of the survey and other sources of information indicate the wide degree of heterogeneity of this group. While the person most likely to be disadvantaged by being carless is female and elderly, over half the population suffers from lack of access to a car. Car availability, as opposed to household car ownership is a key variable in determining degree of disadvantaged. Of all households that owned no car, over three-quarters had a car available for at least one significant activity. Regardless of access to a car, there is a basic level of mobility, expressed in trips per person, per day common to most people. Differences in travel between groups are qualitative rather than quantitative and occur in the selection of activities and the priority of activities people choose. Fourteen non-work activities were examined in depth. It was found that while public transit is a viable alternative to the car for non-work trips, the viability is limited to only a few selected activities. Walking is extremely important to the carless.

  18. The problem of bias when nursing facility staff administer customer satisfaction surveys.

    Science.gov (United States)

    Hodlewsky, R Tamara; Decker, Frederic H

    2002-10-01

    Customer satisfaction instruments are being used with increasing frequency to assess and monitor residents' assessments of quality of care in nursing facilities. There is no standard protocol, however, for how or by whom the instruments should be administered when anonymous, written responses are not feasible. Researchers often use outside interviewers to assess satisfaction, but cost considerations may limit the extent to which facilities are able to hire outside interviewers on a regular basis. This study was designed to investigate the existence and extent of any bias caused by staff administering customer satisfaction surveys. Customer satisfaction data were collected in 1998 from 265 residents in 21 nursing facilities in North Dakota. Half the residents in each facility were interviewed by staff members and the other half by outside consultants; scores were compared by interviewer type. In addition to a tabulation of raw scores, ordinary least-squares analysis with facility fixed effects was used to control for resident characteristics and unmeasured facility-level factors that could influence scores. Significant positive bias was found when staff members interviewed residents. The bias was not limited to questions directly affecting staff responsibilities but applied across all types of issues. The bias was robust under varying constructions of satisfaction and dissatisfaction. A uniform method of survey administration appears to be important if satisfaction data are to be used to compare facilities. Bias is an important factor that should be considered and weighed against the costs of obtaining outside interviewers when assessing customer satisfaction among long term care residents.

  19. Aspects of Nonabelian Group Based Cryptography: A Survey and Open Problems

    CERN Document Server

    Fine, Benjamin; Kahrobaei, Delaram; Rosenberger, Gerhard

    2011-01-01

    Most common public key cryptosystems and public key exchange protocols presently in use, such as the RSA algorithm, Diffie-Hellman, and elliptic curve methods are number theory based and hence depend on the structure of abelian groups. The strength of computing machinery has made these techniques theoretically susceptible to attack and hence recently there has been an active line of research to develop cryptosystems and key exchange protocols using noncommutative cryptographic platforms. This line of investigation has been given the broad title of noncommutative algebraic cryptography. This was initiated by two public key protocols that used the braid groups, one by Ko, Lee et.al.and one by Anshel, Anshel and Goldfeld. The study of these protocols and the group theory surrounding them has had a large effect on research in infinite group theory. In this paper we survey these noncommutative group based methods and discuss several ideas in abstract infinite group theory that have arisen from them. We then presen...

  20. ADVENTURE TOURISM IN THE SURVEYED POLISH ADVENTURE TOURISTS’ OPINION – OUTLINE OF THE PROBLEM

    Directory of Open Access Journals (Sweden)

    Ewa Cieślik

    2014-12-01

    Full Text Available Tourism is a kind of human activity, which has the ability to simultaneously satisfy a wide human needs’ range and develop people’s personality. Adventure tourism term is a type of tourism able to fulfill these types of human needs. The aim of the study was to know the Polish tourists opinion about the adventure tourism in Poland. The study involved 50 people, taking into account their gender, age, education and occupational status. The research tool was a survey questionnaire. The study indicated that it is not a popular form of tourism in Poland. Its proponents, the information about places and facilities derive mainly from the Internet. The most popular forms are trekking, tramping, caves exploration, paintball, windsurfing, bungejumping and rafting. Rather average possibility of practicing the adventure tourism in Poland is associated with multitude barriers, mainly financial investments, lack of free time, as well as fear and general fear of some of its forms.

  1. The Gaia-ESO Survey: A simple explanation for the Li-rich giant problem

    DEFF Research Database (Denmark)

    Casey, Andrew R.; Ruchti, G.; Masseron, T.;

    2016-01-01

    of evidence actually predict the existence of Li-rich giants, and suggests they should be preferentially found before the luminosity bump at near-solar metallicities, consistent with observations. This scenario explains (indeed, predicts) the majority properties of Li-rich giants, leaving a minority...... observed through the Gaia-ESO Survey. Our sample is one of the largest in the literature, and includes nine towards the CoRoT fields. We explore all mechanisms proposed to explain Li-rich giants. While the planet accretion scenario was presented to reconcile observations of Li-rich giants across the RGB....../AGB, this is inconsistent with recent studies of close-in giant planets. We highlight recent observations of the difference in hot Jupiter occurrence rates around dwarf and sub-giant stars as evidence for their tidal destruction when the convective envelope expands. Therefore any close-in giant planet is likely...

  2. Problems using ratios of galaxy shape moments in requirements for weak lensing surveys

    Science.gov (United States)

    Israel, H.; Kitching, T. D.; Massey, R.; Cropper, M.

    2017-01-01

    Context. The shapes of galaxies are typically quantified by ratios of their quadrupole moments. Knowledge of these ratios (i.e. their measured standard deviation) is commonly used to assess the efficiency of weak gravitational lensing surveys. For faint galaxies, observational noise can make the denominator close to zero, so the ratios become ill-defined. Aims: Since the requirements cannot be formally tested for faint galaxies, we explore two complementary mitigation strategies. In many weak lensing contexts, the most problematic sources can be removed by a cut in measured size. This first technique is applied frequently. As our second strategy, we propose requirements directly on the quadrupole moments rather than their ratio. Methods: As an example of the first strategy, we have investigated how a size cut affects the required precision of the charge transfer inefficiency model for two shape measurement settings. For the second strategy, we analysed the joint likelihood distribution of the image quadrupole moments measured from simulated galaxies, and propagate their (correlated) uncertainties into ellipticities. Results: Using a size cut, we find slightly wider tolerance margins for the charge transfer inefficiency parameters compared to the full size distribution. However, subtle biases in the data analysis chain may be introduced. These can be avoided using the second strategy. To optimally exploit a Stage-IV dark energy survey, we find that the mean and standard deviation of a population of galaxies' quadrupole moments must to be known to better than 1.4 × 10-3 arcsec2, or the Stokes parameters to 1.9 × 10-3 arcsec2. Conclusions: Cuts in measured size remove sources that otherwise make ellipticity statistics of weak lensing galaxy samples diverge. However, size cuts bias the source population non-trivially. Assessing weak lensing data quality directly on the quadrupole moments instead mitigates the need for size cuts. Such testable requirements can form

  3. SURVEY

    DEFF Research Database (Denmark)

    SURVEY er en udbredt metode og benyttes inden for bl.a. samfundsvidenskab, humaniora, psykologi og sundhedsforskning. Også uden for forskningsverdenen er der mange organisationer som f.eks. konsulentfirmaer og offentlige institutioner samt marketingsafdelinger i private virksomheder, der arbejder...... med surveys. Denne bog gennemgår alle surveyarbejdets faser og giver en praktisk indføring i: • design af undersøgelsen og udvælgelse af stikprøver, • formulering af spørgeskemaer samt indsamling og kodning af data, • metoder til at analysere resultaterne...

  4. Model-based elastography: a survey of approaches to the inverse elasticity problem

    Science.gov (United States)

    Doyley, M M

    2012-01-01

    Elastography is emerging as an imaging modality that can distinguish normal versus diseased tissues via their biomechanical properties. This article reviews current approaches to elastography in three areas — quasi-static, harmonic, and transient — and describes inversion schemes for each elastographic imaging approach. Approaches include: first-order approximation methods; direct and iterative inversion schemes for linear elastic; isotropic materials; and advanced reconstruction methods for recovering parameters that characterize complex mechanical behavior. The paper’s objective is to document efforts to develop elastography within the framework of solving an inverse problem, so that elastography may provide reliable estimates of shear modulus and other mechanical parameters. We discuss issues that must be addressed if model-based elastography is to become the prevailing approach to quasi-static, harmonic, and transient elastography: (1) developing practical techniques to transform the ill-posed problem with a well-posed one; (2) devising better forward models to capture the transient behavior of soft tissue; and (3) developing better test procedures to evaluate the performance of modulus elastograms. PMID:22222839

  5. Problems and Proposals of Their Solutions in Dermatology Residency Training: A Survey of Residents’ Opinions in Turkey

    Directory of Open Access Journals (Sweden)

    Sadık Yılmaz

    2009-03-01

    Full Text Available Background and Design: There are many problems in dermatology residency training. The purpose of this study was to describe dermatology residents’ opinions about problems and proposals of their solutions of dermatology residency training programs in Turkey. In addition, by means of these estimations to propose efficient and standard curriculum components are aimed. Material and Method: A descriptive pilot study was designed and a questionnaire was prepared to describe the problems and suggestions for the solution in dermatology residency education. The survey was conducted between 20 June 2006 and 09 August 2006. The questions were prepared in accordance with a 1 to 5 Likert-type scale to evaluate the level of importance and sufficiency of the residents’ opinions. Results: Sixty seven (52 female, 15 male residents responded to the survey. Based on the importance evaluation, although clinical-pathological meetings were the most important educational component, all other educational components were also indicated as important. Based on the sufficiency evaluation, the least sufficient educational components were photodermatology/laser therapy training (score, 1,82 of 5,0 and cosmetic dermatology (1,83. Sufficiency levels of educational components such as textbook review, translation and discussion (3,86 journal club (4,04, preparation of seminar (4,03 and allergy training (2,95 were evaluated as sufficient. All other educational components were determined as insufficient. Overall, the greatest discrepancies between the importance and sufficiency for all educational components were observed in cosmetic dermatology education (2,50.Conclusion: This is the first study to assess dermatology residency education based on the residents’ perspectives, in Turkey. These results show the necessity for review and revise of some of the elements and the necessity to prepare a standard curriculum of dermatology residency education. It is appropriate to

  6. High incidence of sleep problems in children with developmental disorders: results of a questionnaire survey in a Japanese elementary school.

    Science.gov (United States)

    Matsuoka, Michiko; Nagamitsu, Shinichiro; Iwasaki, Mizue; Iemura, Akiko; Yamashita, Yushiro; Maeda, Masaharu; Kitani, Shingo; Kakuma, Tatsuyuki; Uchimura, Naohisa; Matsuishi, Toyojiro

    2014-01-01

    The aim of the present school-based questionnaire was to analyze the sleep problems of children with developmental disorders, such as pervasive developmental disorder and attention deficit hyperactivity disorder. The sleep problems of 43 children with developmental disorders were compared with those of 372 healthy children (control group). All children attended one public elementary school in Kurume, Japan; thus, the study avoided the potential bias associated with hospital-based surveys (i.e. a high prevalence of sleep disturbance) and provided a more complete picture of the children's academic performance and family situation compared with a control group under identical conditions. Children's sleep problems were measured with the Japanese version of the Children's Sleep Habits Questionnaire (CSHQ). Children with developmental disorders had significantly higher total CSHQ scores, as well as mean scores on the parasomnias and sleep breathing subscales, than children in the control group. The total CSHQ score, bedtime resistance, sleep onset delay, and daytime sleepiness worsened with increasing age in children with developmental disorders; in contrast, these parameters were unchanged or became better with age in the control group. In children with developmental disorders, there was a significant association between a higher total CSHQ score and lower academic performance, but no such association was found in the control group. For both groups, children's sleep problems affected their parents' quality of sleep. There were no significant differences in physical, lifestyle, and sleep environmental factors, or in sleep/wake patterns, between the two groups. Children with developmental disorders have poor sleep quality, which may affect academic performance. It is important for physicians to be aware of age-related differences in sleep problems in children with developmental disorders. Further studies are needed to identify the association between sleep quality and

  7. The Gaia-ESO Survey: revisiting the Li-rich giant problem

    Science.gov (United States)

    Casey, A. R.; Ruchti, G.; Masseron, T.; Randich, S.; Gilmore, G.; Lind, K.; Kennedy, G. M.; Koposov, S. E.; Hourihane, A.; Franciosini, E.; Lewis, J. R.; Magrini, L.; Morbidelli, L.; Sacco, G. G.; Worley, C. C.; Feltzing, S.; Jeffries, R. D.; Vallenari, A.; Bensby, T.; Bragaglia, A.; Flaccomio, E.; Francois, P.; Korn, A. J.; Lanzafame, A.; Pancino, E.; Recio-Blanco, A.; Smiljanic, R.; Carraro, G.; Costado, M. T.; Damiani, F.; Donati, P.; Frasca, A.; Jofré, P.; Lardo, C.; de Laverny, P.; Monaco, L.; Prisinzano, L.; Sbordone, L.; Sousa, S. G.; Tautvaišienė, G.; Zaggia, S.; Zwitter, T.; Delgado Mena, E.; Chorniy, Y.; Martell, S. L.; Silva Aguirre, V.; Miglio, A.; Chiappini, C.; Montalban, J.; Morel, T.; Valentini, M.

    2016-09-01

    The discovery of lithium-rich giants contradicts expectations from canonical stellar evolution. Here we report on the serendipitous discovery of 20 Li-rich giants observed during the Gaia-ESO Survey, which includes the first nine Li-rich giant stars known towards the CoRoT fields. Most of our Li-rich giants have near-solar metallicities and stellar parameters consistent with being before the luminosity bump. This is difficult to reconcile with deep mixing models proposed to explain lithium enrichment, because these models can only operate at later evolutionary stages: at or past the luminosity bump. In an effort to shed light on the Li-rich phenomenon, we highlight recent evidence of the tidal destruction of close-in hot Jupiters at the sub-giant phase. We note that when coupled with models of planet accretion, the observed destruction of hot Jupiters actually predicts the existence of Li-rich giant stars, and suggests that Li-rich stars should be found early on the giant branch and occur more frequently with increasing metallicity. A comprehensive review of all known Li-rich giant stars reveals that this scenario is consistent with the data. However, more evolved or metal-poor stars are less likely to host close-in giant planets, implying that their Li-rich origin requires an alternative explanation, likely related to mixing scenarios rather than external phenomena.

  8. The Gaia-ESO Survey: A simple explanation for the Li-rich giant problem

    CERN Document Server

    Casey, Andrew R; Masseron, T; Randich, S; Gilmore, G; Lind, K; Kennedy, G M; Smiljanic, R; Jofre, P; Hourihane, A; Bragaglia, A; Donati, P; Koposov, S E; Worley, C C; Lanzafame, A; Franciosini, E; Lewis, J R; Magrini, L; Morbidelli, L; Sacco, G G; Bensby, T; Carraro, G; Damiani, F; Feltzing, S; Jeffries, R D; Korn, A J; Lardo, C; de Laverny, P; Mena, E Delgado; Costado, M T; Flaccomio, E; Frasca, A; Monaco, L; Pancino, E; Prisinzano, L; Recio-Blanco, A; Sbordone, L; Sousa, S G; Tautvaisiene, G; Vallenari, A; Zaggia, S; Zwitter, T; Aguirre, V Silva; Chorniy, Y; Martell, S L; Miglo, A; Chiappini, C; Montalban, J; Morel, T; Valentini, M

    2016-01-01

    The discovery of lithium-rich giants contradicts expectations from canonical stellar evolution. Although multiple scenarios have been proposed to preserve or produce Li, no model can explain the ensemble properties of Li-rich giants. We report on the serendipitous discovery of 20 Li-rich giants observed through the Gaia-ESO Survey. Our sample is one of the largest in the literature, and includes nine towards the CoRoT fields. We explore all mechanisms proposed to explain Li-rich giants. While the planet accretion scenario was presented to reconcile observations of Li-rich giants across the RGB/AGB, this is inconsistent with recent studies of close-in giant planets. We highlight recent observations of the difference in hot Jupiter occurrence rates around dwarf and sub-giant stars as evidence for their tidal destruction when the convective envelope expands. Therefore any close-in giant planet is likely to be engulfed well before the host evolves up the RGB/AGB. When this occurs, simulations indicate a giant pla...

  9. Ethics, finance, and automation: a preliminary survey of problems in high frequency trading.

    Science.gov (United States)

    Davis, Michael; Kumiega, Andrew; Van Vliet, Ben

    2013-09-01

    All of finance is now automated, most notably high frequency trading. This paper examines the ethical implications of this fact. As automation is an interdisciplinary endeavor, we argue that the interfaces between the respective disciplines can lead to conflicting ethical perspectives; we also argue that existing disciplinary standards do not pay enough attention to the ethical problems automation generates. Conflicting perspectives undermine the protection those who rely on trading should have. Ethics in finance can be expanded to include organizational and industry-wide responsibilities to external market participants and society. As a starting point, quality management techniques can provide a foundation for a new cross-disciplinary ethical standard in the age of automation.

  10. The use of aromasticks to help with sleep problems: A patient experience survey.

    Science.gov (United States)

    Dyer, Jeannie; Cleary, Lise; McNeill, Sara; Ragsdale-Lowe, Maxine; Osland, Caroline

    2016-02-01

    To document the use of aromasticks to facilitate sleep in a cancer centre in the UK. Sleep disturbance is a common problem amongst patients diagnosed with cancer. Essential oils may be inhaled by means of an aromastick (a personal inhaler device containing essential oils) as a means of improving sleep. A prospective audit of aromasticks given to help facilitate sleep. Sixty-five aromasticks were given out over a 13 week period. 94% of patients reported that they did use their aromastick to help them sleep and 92% reported that they would continue to do so. An improvement of at least one point on a Likert scale measuring sleep quality was shown by 64% of patients following the use of an aromastick. Bergamot (Citrus bergamia) and sandalwood (Santalum austrocaladonicum); and frankincense (Boswellia carterii), mandarin (Citrus reticulata) and lavender (Lavandula angustifolia) were the essential oils used in the two blends chosen by patients.

  11. Feigned Symptoms among Defendants Claiming Psychiatric Problems: Survey of 45 Malingerers

    Directory of Open Access Journals (Sweden)

    Seyed Mehdi Saberi

    2013-03-01

    Full Text Available Objective: In many jurisdictions, psychiatric problems are intended for commutation. Therefore, a forensic psychiatrist has an important role in detection of malingering. While several studies evaluate diagnostic tests, it is less known what symptoms are more likely to be imitated by malingerers.Method: In a prospective study [t1] 45 [t2] malingerers, who were diagnosed according to interviews by two forensic psychiatrists, from defendants [t3] with a judicial order for evaluation of mental status and criminal responsibility during a period of eighteen months were examined in legal medicine center of Tehran.[t4] [t5] Participants were assessed in another interview to determine symptoms. Dichotomous symptoms in felony and misdemeanor groups were analyzed using fisher’s exact test. The level of statistical significance was set at P<0.05. [t6] Results: Thirty-eight malingerers were charged with misdemeanors and seven with felonies. Behavioral symptoms were most frequently faked by 35 participants (77.8%. Participants charged with criminal accusation had a significantly lower mean age (P=0.032 and a higher level of education (P=0.008 than other non-criminal defendants. A statistically significant increase in memory function problems was demonstrated in the misdemeanor group (P=0.040. With regard to dual symptom imitation, statistically significant correlations were observed between thought content and perceptual symptoms (P=0.048 for felonies and mood & affect and thought process symptoms (P=0.034, mood & affect and behavioral symptoms (P=0.000 and cognitive function and behavioral symptoms (P=0.039 for misdemeanors. In general, many simulators attempted to mimic simple symptoms of behavioral disorders. Probably felony offenses need less accurate programming; therefore, their rates are higher in older, less educated participants.Conclusion: This study demonstrated that differences between presenting symptoms among different offenses may not be

  12. Alcohol marketing, drunkenness, and problem drinking among Zambian youth: findings from the 2004 Global School-Based Student Health Survey.

    Science.gov (United States)

    Swahn, Monica H; Ali, Bina; Palmier, Jane B; Sikazwe, George; Mayeya, John

    2011-01-01

    This study examines the associations between alcohol marketing strategies, alcohol education including knowledge about dangers of alcohol and refusal of alcohol, and drinking prevalence, problem drinking, and drunkenness. Analyses are based on the Global School-Based Student Health Survey (GSHS) conducted in Zambia (2004) of students primarily 11 to 16 years of age (N = 2257). Four statistical models were computed to test the associations between alcohol marketing and education and alcohol use, while controlling for possible confounding factors. Alcohol marketing, specifically through providing free alcohol through a company representative, was associated with drunkenness (AOR = 1.49; 95% CI: 1.09-2.02) and problem drinking (AOR = 1.41; 95% CI: 1.06-1.87) among youth after controlling for demographic characteristics, risky behaviors, and alcohol education. However, alcohol education was not associated with drunkenness or problem drinking. These findings underscore the importance of restricting alcohol marketing practices as an important policy strategy for reducing alcohol use and its dire consequences among vulnerable youth.

  13. Alcohol Marketing, Drunkenness, and Problem Drinking among Zambian Youth: Findings from the 2004 Global School-Based Student Health Survey

    Directory of Open Access Journals (Sweden)

    Monica H. Swahn

    2011-01-01

    Full Text Available This study examines the associations between alcohol marketing strategies, alcohol education including knowledge about dangers of alcohol and refusal of alcohol, and drinking prevalence, problem drinking, and drunkenness. Analyses are based on the Global School-Based Student Health Survey (GSHS conducted in Zambia (2004 of students primarily 11 to 16 years of age (=2257. Four statistical models were computed to test the associations between alcohol marketing and education and alcohol use, while controlling for possible confounding factors. Alcohol marketing, specifically through providing free alcohol through a company representative, was associated with drunkenness (AOR = 1.49; 95% CI: 1.09–2.02 and problem drinking (AOR = 1.41; 95% CI: 1.06–1.87 among youth after controlling for demographic characteristics, risky behaviors, and alcohol education. However, alcohol education was not associated with drunkenness or problem drinking. These findings underscore the importance of restricting alcohol marketing practices as an important policy strategy for reducing alcohol use and its dire consequences among vulnerable youth.

  14. Parent Beliefs about the Causes of Learning and Developmental Problems among Children with Autism Spectrum Disorder: Results from a National Survey

    Science.gov (United States)

    Zuckerman, Katharine E.; Lindly, Olivia J.; Sinche, Brianna

    2016-01-01

    This study aimed to assess variation in parent beliefs about causes of learning and developmental problems in U.S. children with autism spectrum disorder, using data from a nationally representative survey. Results showed that beliefs about a genetic/hereditary cause of learning/developmental problems were most common, but nearly as many parents…

  15. A brief survey of constrained mechanics and variational problems in terms of differential forms

    Science.gov (United States)

    Hermann, Robert

    1994-01-01

    There has been considerable interest recently in constrained mechanics and variational problems. This is in part due to applied interests (such as 'non-holonomic mechanics in robotics') and in other part due to the fact that several schools of 'pure' mathematics have found that this classical subject is of importance for what they are trying to do. I have made various attempts at developing these subjects since my Lincoln lab days of the late 1950's. In this Chapter, I will sketch a Unified point of view, using Cartan's approach with differential forms. This has the advantage from the C-O-R viewpoint being developed in this Volume that the extension from 'smooth' to 'generalized' data is very systematic and algebraic. (I will only deal with the 'smooth' point of view in this Chapter; I will develop the 'generalized function' material at a later point.) The material presented briefly here about Variational Calculus and Constrained Mechanics can be found in more detail in my books, 'Differential Geometry and the Calculus of Variations', 'Lie Algebras and Quantum Mechanics', and 'Geometry, Physics and Systems'.

  16. Psychosocial Problems Syndemically Increase Adolescent Substance Use: Findings From a Cross-sectional Survey of 82,812 Chinese Adolescents.

    Science.gov (United States)

    Wu, Jie; Wu, Hong; Wang, Juan; Deng, Jianxiong; Gao, Xue; Xu, Yan; Huang, Guoliang; Huang, Jinghui; Guo, Lan; Lu, Ciyong

    2015-12-01

    A growing body of studies have indicated the associations between substance use and psychosocial problems in adolescents. However, few of them have examined whether these psychosocial problems form a syndemic, which means the co-occurrence of psychosocial problems accompanied by additional effects on substance use.We conducted a cross-sectional survey with 82,812 Chinese adolescents who were selected using a multistage random procedure. Bivariate associations were estimated between selected syndemic indicators and adolescent substance use. Multivariate logistic regression was used to estimate the association between the syndemic indicator count score (the count of syndemic indicators) and adolescent substance use. In addition, cluster analysis was used to partition participants reporting at least one of syndemic indicators to assess associations between resolved cluster memberships and adolescent substance use.All selected syndemic indicators were associated with each other and with adolescent substance use. As the number of syndemic indicators increases, stronger associations with substance use were found in our analysis: the range of adjusted OR was from 1.57 (95% CI: 1.38-1.79) for 1 syndemic indicator to 9.45 (95% CI: 7.60-11.76) for 5 or 6 syndemic indicators. There was no effect modification of gender on these additive associations. The multivariate logistic regression indicated that the cluster membership of nonlow SES academic failures has the highest odds of using substance (OR = 2.26, 95% CI: 2.12-2.41), compared to students reporting none syndemic indicators.Our findings support the syndemic hypothesis that adolescents bearing multiple psychosocial problems experience additive risks of using substance. Our findings support that a comprehensive approach to substance use prevention in adolescents would necessitate the involvement of a variety of providers.

  17. Lack of quantitative training among early-career ecologists: a survey of the problem and potential solutions

    Directory of Open Access Journals (Sweden)

    Frédéric Barraquand

    2014-03-01

    Full Text Available Proficiency in mathematics and statistics is essential to modern ecological science, yet few studies have assessed the level of quantitative training received by ecologists. To do so, we conducted an online survey. The 937 respondents were mostly early-career scientists who studied biology as undergraduates. We found a clear self-perceived lack of quantitative training: 75% were not satisfied with their understanding of mathematical models; 75% felt that the level of mathematics was “too low” in their ecology classes; 90% wanted more mathematics classes for ecologists; and 95% more statistics classes. Respondents thought that 30% of classes in ecology-related degrees should be focused on quantitative disciplines, which is likely higher than for most existing programs. The main suggestion to improve quantitative training was to relate theoretical and statistical modeling to applied ecological problems. Improving quantitative training will require dedicated, quantitative classes for ecology-related degrees that contain good mathematical and statistical practice.

  18. The Problems in Rural English Teaching and the Optimization Path: A Study Based on the Chinese General Social Survey Data

    Institute of Scientific and Technical Information of China (English)

    Hong; TAN

    2014-01-01

    The new curriculum,new ideas and new requirements concerning English teaching have made the rural English teaching face unprecedented challenges. There are many problems contributing to the poor effect of rural English teaching,such as outdated teaching equipment,unreasonable curriculum design,insufficient teaching staff,asymmetrical teaching content,family education and students’ personal problems. Based on the Chinese General Social Survey data,it is found that in terms of English reading,English speaking or English writing,the current English level of China’s rural residents is lagging behind. From the average,the reading level of rural residents is better than the speaking and writing level,but the paired T-test results show that there are no significant differences between them,suggesting that under the current system of rural English teaching,the English level of rural residents is constrained to a low level. To improve the rural English teaching in the future,it is necessary to pay close attention to the following aspects: stabilizing the investment in rural education; optimizing the English teaching content; converting the philosophy of education; increasing teacher training; establishing the new linkage system.

  19. Association of obesity and sleep problems among breast cancer survivors: results from a registry-based survey study.

    Science.gov (United States)

    Klyushnenkova, Elena N; Sorkin, John D; Gallicchio, Lisa

    2015-12-01

    Sleep-related complaints are common among breast cancer survivors. However, the risk factors underlying sleep disturbances in this population are not completely understood. Some studies have shown that maintaining normal weight can result in a reduced risk of cancer-related symptoms, including sleep problems; however, data from published studies are not consistent. This study examined the associations between body mass index (BMI) and sleep-related complaints in breast cancer survivors. Self-reported survey data from 861 breast cancer survivors at a single institution were analyzed. BMI was calculated based on self-reported weight and height at the time of the survey. Daytime sleepiness was assessed using the Epworth Sleepiness Scale. Average sleep duration was calculated based on the reported hours of sleep on a typical weekday and weekend. Associations between BMI and the sleep outcomes were estimated using multivariable logistic regression. In adjusted models, BMI was not significantly associated with either excessive daytime sleepiness or "short" sleep pattern (≤ 6 h) in our sample of breast cancer survivors. Younger age, presence of strong acute pain, and lower level of education were independent risk factors for excessive daytime sleepiness. African American race, presence of strong acute pain, and lower level of education were independent risk factors for being a short sleeper. Findings from this study indicate that BMI is not independently associated with sleep-related outcomes among breast cancer survivors. More research is needed to identify cancer survivors who are at increased risk for sleep disturbances as well as the mechanisms that underlie such disturbances.

  20. Survey results of corroding problems at biological treatment plants; Kartlaeggning av vittrings- och korrosionsskador paa biologiska behandlingsanlaeggningar

    Energy Technology Data Exchange (ETDEWEB)

    Boubitsas, Dimitrios; Aakesson, Urban (CBI, Boraas (Sweden)); Hellstroem, Hanna; Henriksson, Gunilla (SP, Boraas (Sweden))

    2010-03-15

    Problems regarding that leachate from food waste have been corroding vehicles and concrete slabs has been reported by Biogas- and composting plants. This is an issue that has been reported to Swedish Waste Management more often within the same pace as the volume of food waste gathering is increasing all around Sweden. The problem has also been addressed at inspections according to SPCR 120 Biogoedsel and SPCR 152 Kompost, where several plants have requested guidance/support/investigation to help solve their specific issue. Swedish Cement and Concrete Research Inst., has earlier completed some investigations which have been ordered by private plant owners/municipalities and the result from these investigations have often proved that the exposure classification has not been adjusted for its purpose. There is no clear definition regarding construction of concrete that is meant for usage in a receiving hall for food waste. It is likely that concrete for Biogas- and Composting plants are built to meet the demands of agricultural environments. The project will examine the magnitude of the problem regarding corrosion- and weathering damage on concrete slabs and cisterns at biological treatment plants. The project will also culminate to actual solutions for plants that are hit and to give advice to those in the danger zone and those who plan for new constructions. Through a survey handed to Biogas- and composting plants around the country, the width of the problem has been examined and what solutions plants have found and executed to solve this issue. A literature review has been implemented to find specific demands regarding concrete that is meant for a certain environment. Another four treatment plants have been examined. The studies that have been made are chemical analysis of leachate from food waste, analysis of drill cores and analysis of reinforcement corrosion. The results from this project show that concrete doesn't have enough resistance in these

  1. Accurate treatments of electrostatics for computer simulations of biological systems: A brief survey of developments and existing problems

    Science.gov (United States)

    Yi, Sha-Sha; Pan, Cong; Hu, Zhong-Han

    2015-12-01

    Modern computer simulations of biological systems often involve an explicit treatment of the complex interactions among a large number of molecules. While it is straightforward to compute the short-ranged Van der Waals interaction in classical molecular dynamics simulations, it has been a long-lasting issue to develop accurate methods for the longranged Coulomb interaction. In this short review, we discuss three types of methodologies for the accurate treatment of electrostatics in simulations of explicit molecules: truncation-type methods, Ewald-type methods, and mean-field-type methods. Throughout the discussion, we brief the formulations and developments of these methods, emphasize the intrinsic connections among the three types of methods, and focus on the existing problems which are often associated with the boundary conditions of electrostatics. This brief survey is summarized with a short perspective on future trends along the method developments and applications in the field of biological simulations. Project supported by the National Natural Science Foundation of China (Grant Nos. 91127015 and 21522304) and the Open Project from the State Key Laboratory of Theoretical Physics, and the Innovation Project from the State Key Laboratory of Supramolecular Structure and Materials.

  2. Pilot survey of HIV risk and contextual problems and issues in Mexican/Latino migrant day laborers.

    Science.gov (United States)

    Organista, Kurt C; Kubo, Ai

    2005-10-01

    A preliminary survey was conducted with 102 migrant day laborers (MDLs) to assess HIV risk and related contextual problems and issues. These men were primarily Mexican, of low SES background, low in acculturation to the United States, and their income ranged from $100 and $400 a week, 40% of which is sent back home. The psychosocial context of HIV risk included concerns expressed about lack of money and employment, followed by racism, social isolation, sadness and loneliness. High rates of alcohol use and binge drinking that co-occur with sexual activities were reported. While only 7% of MDLs reported illegal injection drug use, needles were frequently shared without bleach cleaning. Men generally did not carry condoms and knowledge of proper condom use was poor. For the most common form of sex reported, vaginal sex, condom use was infrequent. However, men did report confidence in being able to insist on condom use in challenging sexual situations, and they also reported fairly frequent pro-condom attitudes and behaviors within their social circles. Slightly over half of the men reported sexual activity with female partners, during the past 2 months. These female partners were almost evenly divided into regular sex partners, including spouses, and riskier partners such as one time only sex partners, prostitutes, and multiple sex partners. Results also indicated encouraging efforts by MDLs to reduce risk with risky partners (e.g., more condom use).

  3. Family physicians' involvement and self-reported comfort and skill in care of children with behavioral and emotional problems: a population-based survey

    Directory of Open Access Journals (Sweden)

    Klassen Anne F

    2005-03-01

    Full Text Available Abstract Background Little is known about general and family practitioners' (GP/FPs' involvement and confidence in dealing with children with common psychosocial problems and mental health conditions. The aims of this study were to ascertain GP/FPs' preferred level of involvement with, and perceived comfort and skill in dealing with children with behavioral problems, social-emotional difficulties, attention-deficit/hyperactivity disorder (ADHD, and mood disorders; and to identify factors associated with GP/FPs' involvement, comfort and skill. Methods Postal survey of a representative sample of 801 GP/FPs in British Columbia, Canada, which enquired about level of involvement (from primarily refer out to deal with case oneself; ratings of comfort/skill with assessment/diagnosis and management; beliefs regarding psychosocial problems in children; basic demographics; and practice information. Results Surveys were completed by 405 of 629 eligible GP/FPs (64.4%. Over 80% of respondents reported collaborative arrangements with specialists across problem and condition types, although for children with behavior problems or ADHD, more physicians primarily refer (χ2 (1 = 9.0; P 2 (1 = 103.9; P Conclusion Supporting GP/FPs in their care for children with common psychosocial and mental health problems should include efforts to bolster their confidence and modify attitudes in relation towards these problems, especially behavior problems and ADHD, possibly within innovative continuing education programs.

  4. Service Use for Mental Health Problems in People with Delusional-Like Experiences: A Nationwide Population Based Survey

    Science.gov (United States)

    Saha, Sukanta; McGrath, John; Scott, James

    2013-01-01

    Objective Previous population-based studies have found that delusional-like experiences (DLEs) are prevalent in the community, and are associated with a wide range of mental health disorders. The aim of the study was to investigate mental health service use by people with DLEs. Methods Subjects were drawn from the Australian National Survey of Mental Health and Wellbeing 2007 of 8 841community residents aged between 16 and 85 years. The Composite International Diagnostic Interview (CIDI) was used to identify DLEs. Service utilization was assessed using a module that elicited information about hospital admissions, consultations with various health professionals, and prescription medication use. This study focussed on service use for mental health problems. We used logistic regression to examine the association, adjusting for potential confounding factors. Results Of 8 773 included participants, 8.4% (n = 776) positively endorsed one or more DLEs. With respect to consultations for mental health needs, individuals who endorsed DLEs were more likely to consult health professionals compared with those who did not endorse DLEs. Individuals with DLEs were also more likely to use prescription medicine. When we repeated the main analysis in a subgroup excluding any CIDI diagnosis of mental health disorders the results remained largely unchanged. Conclusions DLEs are common in the general population, and individuals with DLEs have an increased rate of accessing services for their mental health needs. Individuals endorsing both DLEs and increased help-seeking may identify a group of vulnerable people who have increased risk of developing psychotic illnesses later in life. This needs closer scrutiny in longitudinal prospective studies. PMID:23991012

  5. Survey results of corroding problems at biological treatment plants, Stage II Protection of concrete - State of the Art

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, Ylva (CBI, Boraas (Sweden)); Henriksson, Gunilla (SP, Boraas (Sweden))

    2011-07-01

    A pilot study on the degradation and corrosion of concrete in biological treatment plants was conducted in 2009/2010 in a Waste Refinery Project WR-27 'Survey results of corroding problems at biological treatment plants'. The results showed that the concrete does not have sufficient resistance in the current aggressive plant environment. Furthermore, it is stated that some form of surface protection system is needed to ensure the good performance of concrete constructions, and that the system must withstand the aggressive environment and the traffic that occurs on site. Consequently, a new study was proposed in order to develop specifications for surface protection of concrete in aggressive food waste environments. Results from that study are presented in this report. The report includes various types of waterproofing/protection coating for concrete in biological treatment plants. A number of proposals from the industry are presented in the light of results from project WR-27, i.e., the materials must, among other things, withstand the aggressive leachate from waste food at temperatures up to 70 deg C, and some degree of wear. Some systems are compared in terms of technical material properties as reported by the manufacturer. It turns out that different testing methods were used, and the test results are thus generally not directly comparable. A proposal for a test program has been developed, focusing on chemical resistance and wear resistance. A test solution corresponding to leachate is specified. Laboratory tests for verification of the proposed methodology and future requirements are proposed, as well as test sites and follow-up in the field

  6. Surveying the meritocracy: the problems of intelligence and mobility in the studies of the Population Investigation Committee.

    Science.gov (United States)

    Ramsden, Edmund

    2014-09-01

    The post-war era saw the emergence of large-scale and longitudinal social and medical surveys in Britain. That these surveys were both representative of an entire nation and could follow individuals throughout their lives, gave them a privileged position in relation to policy-making. This paper will focus on two closely interrelated surveys, both instigated by the Population Investigation Committee at London School of Economics-the National Survey of Health and Development, which began in 1946, and the Scottish Mental Survey of 1947. These surveys had a critical role in educational research and policy and, more specifically, in changing perspectives regarding the concept and measurement of intelligence. They were seen to privilege social and environmental factors as determinants of mental ability, and they shifted attention away from genetic factors and eugenic concerns. However, while the surveys were indeed powerful tools, their structure, the questions they asked, the methods they used and the choices made over the data to be tabulated, also determined what could be known. The paper will examine the growing criticism and debate over the large-scale survey. Many argued that smaller-scale studies were more effective in understanding the social and biological causes of intellectual differences, and better for identifying the benefits and dangers of using intelligence and merit as a means of organising society.

  7. Development of a Survey to Examine the Factors that Motivate Secondary Education Teachers' Use of Problem-based Learning (PBL)

    Science.gov (United States)

    Lao, Huei-Chen

    In this quantitative study, a survey was developed and administered to middle and high school teachers to examine what factors motivated them to implement problem-based learning (PBL). Using Expectancy-Value Theory by Eccles et al. (1983) and Self-Determination Theory by Ryan and Deci (2000b) as the theoretical framework, this instrument measured respondents' perceived competence, support for autonomy and relatedness, and value and cost they placed on implementing PBL. Data analyses indicated that the instrument had good reliability. A 3-factor structure was established by exploratory factor analysis which confirmed the construct validity of the instrument. Value of PBL to teachers and their students was the most dominant factor that motivated teachers to implement it. The second most important factor was their self-efficacy and anxiety about failing this pedagogy, and the third factor was teachers' perceived autonomy, and support from schools and colleagues. Regression models showed the predictive power of the factors on teachers' intention to implement PBL, with their perceptions of the value of PBL being the strongest predictor. Results also indicate that teachers with PBL experience perceived significantly higher levels of competence and support from peers, and placed a higher level of value and perceived less cost in implementing PBL than teachers who had not implemented PBL. Teachers' formal training in PBL played a significant role in positively influencing their perceptions of competence and the value of PBL, and reduced their perceived cost of implementing PBL. This, in turn, enhanced teachers' intention of practicing PBL. For teachers who had previously taught with PBL, their responses to two open-ended questions in this instrument corresponded with the theoretical framework of this study and triangulated well with the quantitative data. These teachers highly valued PBL and they recognized the challenges associated with its implementation. These teachers

  8. Problems of making and supplementing of mine-surveying documentation concerning mining activity and some activities made by mining way

    Directory of Open Access Journals (Sweden)

    MikolᚠMilan

    2004-06-01

    Full Text Available The last amendment of the mine surveying decree for mining activity and some activities made by a mining way, Decree of the Ministry of Economy of the Slovak Republic No. 1/1993, has been valid in Slovak Republic since 1993. According practical experience and by applying the mentioned decree in practice, I submit a proposal that could be taken into account in case of any amendment for the mentioned legal regulation. I have arrived at this proposal in virtue of development in the area of mine-surveying instrumentation and in connection with the use of computer art for creation of mine-surveying documentation

  9. What patient problems nurses encounter, and which of these can they influence? A nation-wide questionnaire survey.

    OpenAIRE

    Kieft, R; Francke, A.L.; Delnoij, D.

    2016-01-01

    Background: In order to enhance the nursing profession and its scientific foundation, nurses need to demonstrate how they contribute to quality of care and good outcomes in their patients. This requires systematic, standardized data collection about patient problems, nursing interventions and patient outcomes. However, currently little is known about which patient problems nurses encounter in daily practice, how they help their patients in dealing with these problems, and with which result. A...

  10. A crisis resolution and home treatment team in Norway: a longitudinal survey study Part 3. Changes in morbidity and clinical problems from admission to discharge

    Directory of Open Access Journals (Sweden)

    Biong Stian

    2012-09-01

    Full Text Available Abstract Background Crisis resolution and home treatment (CRHT is an emerging mode of delivering acute mental health care in the community. There is a paucity of knowledge regarding the workings of CRHT in the literature. This is the third paper in a series of three from the longitudinal survey of patients of a CRHT team in Norway, which was aimed at describing the characteristics of patients served, professional services provided, and clinical outcomes. This report focuses on the changes in morbidity and clinical problems from admission to discharge and the length of service. Methods The study was a descriptive, quantitative study based on the patient data from a longitudinal survey of one CRHT team in Norway. The participants of the survey, a total of 363 patients, were the complete registration of patients of this team in the period from February 2008 to July 2009. Results The findings indicate that the patients´ mental health status improved from admission to discharge, although many patients were discharged with the same mental health symptoms as those present at admission. However, one third of the patients were discharged with no clinically significant mental health problems. The majority of the patients of the CRHT team on the other hand seemed to be those with long-standing mental health problems, who were likely to be in need of continuing mental health care even after the resolution of mental health crises. There is a need for a coordinated system of community-based mental health services for patients with long-standing mental health problems, within which CRHT teams can play a pivotal role in making connections between the crisis-care and the recovery-oriented care. The mean length of service was around 15 days with variations by the clinical problem types, with the patients in the psychosis group having the shortest duration and the patients in the depression group having the longest duration.

  11. The Longitudinal Relation between Childhood Autistic Traits and Psychosexual Problems in Early Adolescence: The Tracking Adolescents' Individual Lives Survey Study

    Science.gov (United States)

    Dekker, Linda P.; Hartman, Catharina A.; van der Vegt, Esther J. M.; Verhulst, Frank C.; van Oort, Floor V. A.; Greaves-Lord, Kirstin

    2015-01-01

    Individuals with autistic traits are considered to be prone to develop psychosexual problems due to their limited social skills and insight. This study investigated the longitudinal relation between autistic traits in childhood (T1; age 10-12 years) and parent-reported psychosexual problems in early adolescence (T2; age 12-15 years). In a general…

  12. The longitudinal relation between childhood autistic traits and psychosexual problems in early adolescence : The Tracking Adolescents' Individual Lives Survey study

    NARCIS (Netherlands)

    Dekker, Linda P.; Hartman, Catharina A.; van der Vegt, Esther J. M.; Verhulst, Frank C.; van Oort, Floor V. A.; Greaves-Lord, Kirstin

    2015-01-01

    Individuals with autistic traits are considered to be prone to develop psychosexual problems due to their limited social skills and insight. This study investigated the longitudinal relation between autistic traits in childhood (T1; age 10-12 years) and parent-reported psychosexual problems in early

  13. An Academic Survey Concerning High School and University Students' Attitudes and Approaches to Problem Solving in Chemistry

    Science.gov (United States)

    Duran, Muharrem

    2016-01-01

    The aim of this study is to reveal differences between attitudes and approaches of students from different types of high school and the first grade of university towards problem solving in chemistry. For this purpose, the scale originally developed by Mason and Singh (2010) to measure students' attitude and approaches towards problem solving in…

  14. The Longitudinal Relation between Childhood Autistic Traits and Psychosexual Problems in Early Adolescence: The Tracking Adolescents' Individual Lives Survey Study

    Science.gov (United States)

    Dekker, Linda P.; Hartman, Catharina A.; van der Vegt, Esther J. M.; Verhulst, Frank C.; van Oort, Floor V. A.; Greaves-Lord, Kirstin

    2015-01-01

    Individuals with autistic traits are considered to be prone to develop psychosexual problems due to their limited social skills and insight. This study investigated the longitudinal relation between autistic traits in childhood (T1; age 10-12 years) and parent-reported psychosexual problems in early adolescence (T2; age 12-15 years). In a general…

  15. A snapshot of residents in medical oncology in Turkey: A Nationwide survey on profile and key problems

    Directory of Open Access Journals (Sweden)

    Erdinc Nayir

    2016-04-01

    Conclusion: Recognition of the subspecialty residents who are the future of medical oncology, and determination of their needs, and problems will contribute to the development of recommendations for their solution. In our country their main problems are medical conscription, inadequate education, and burnout.

  16. EXPERIMENTING WITH MULTI-ATTRIBUTE UTILITY SURVEY METHODS IN A MULTI-DIMENSIONAL VALUATION PROBLEM. (R824699)

    Science.gov (United States)

    AbstractThe use of willingness-to-pay (WTP) survey techniques based on multi-attribute utility (MAU) approaches has been recommended by some authors as a way to deal simultaneously with two difficulties that increasingly plague environmental valuation. The first of th...

  17. Defense Health Care: 2008 Access to Care Surveys Indicate Some Problems, but Beneficiary Satisfaction Is Similar to Other Health Plans

    Science.gov (United States)

    2010-03-01

    Sierra Vista, Tucson, Yuma 4. California – Los Angeles, Newport Beach 5. Colorado – Denver, Fort Collins 6. Delaware – Camden, Dover, Wilmington...the 2008 Beneficiary and Provider Surveys Non-Prime Service Area 1. California – Chico, Fresno, Modesto , Napa, Redding, Sacramento, Santa Rosa

  18. Survey on Protocols addressing Head of Line Blocking Problem in Wireless Ad Hoc Networks using Directional Antennas

    Directory of Open Access Journals (Sweden)

    P. SAI KIRAN,

    2011-02-01

    Full Text Available Head of Line blocking phenomenon is common in First in First Out (FIFO nature queues. Head of line blocking problem becomes significant in wireless ad hoc networks using directional antennas as it uses FIFO queue which consists of packets intended for different directions. A packet on the top of the queue may block the remaining packets if it finds the medium busy in its intended direction, where as the packets in the queue intended for other directions may find the medium to be idle. Very few of the MAC protocols for ad hoc networks using directional antennas have addressed this problem. In this paper we will exploit the Head of Line Blocking problem and review the protocols that have addressed the head of Line Blocking Problem.

  19. Predictors of experiences of discrimination and positive treatment in people with mental health problems: findings from an Australian national survey.

    Science.gov (United States)

    Reavley, Nicola J; Morgan, Amy J; Jorm, Anthony F

    2017-03-01

    The aim of the study was to assess the factors predicting experiences of avoidance, discrimination and positive treatment in people with mental health problems. In 2014, telephone interviews were carried out with 5220 Australians aged 18+, 1381 of whom reported a mental health problem or scored highly on a symptom screening questionnaire. Questions covered experiences of avoidance, discrimination and positive treatment by friends, spouse, other family, workplace, educational institution and others in the community; as well as disclosure of mental health problems. Avoidance, discrimination and positive treatment scores were calculated by counting the number of domains in which each occurred. Predictors of avoidance, discrimination and positive treatment were modelled with negative binomial regression analyses. After adjusting for the effects of other predictors in multivariate analyses, symptom severity and a diagnosis of 'any other disorder' (most commonly psychotic disorders or eating disorders) predicted experiences of both avoidance and discrimination but not positive treatment. Disclosing a mental health problem in more settings was also associated with higher rates of avoidance and discrimination, but also with positive treatment. Disclosure of mental health problems to others may increases experiences of discrimination, but may also increase experiences of positive treatment. These findings can help to inform decision making by people with mental health problems about disclosure, particularly in the case of more severe or low-prevalence disorders.

  20. Engineering change management report 2012: Survey results on causes and effects, current practice, problems, and strategies in Brazil

    DEFF Research Database (Denmark)

    Chucholowski, Nepomuk; Langer, Stefan; Ferreira, Marcelo Gitirana Gomes

    management of engineering changes is a crucial precondition for Brazilian companies to successfully compete not only on the fast growing Brazilian market, but also on the world market which becomes more interesting due to the rising industrial power of Brazil. To achieve improvements in engineering change...... management practice, industry and universities need to work together. In this report the main findings of our study on Engineering Change Management (ECM) in Brazilian companies are presented, which indicate possible solution strategies and further research needs. Our survey aimed on the investigation...... of current practice, the biggest challenges and potential strategies of engineering change management. A total of 55 Brazilian companies from a broad range of industry sectors and company sizes participated from December 2011 until January 2012 in the survey which was elaborated and conducted by members...

  1. Psychotic symptoms are associated with physical health problems independently of a mental disorder diagnosis: results from the WHO World Health Survey.

    Science.gov (United States)

    Moreno, Carmen; Nuevo, Roberto; Chatterji, Somnath; Verdes, Emese; Arango, Celso; Ayuso-Mateos, José Luis

    2013-10-01

    This study explored whether physical health problems are related to psychotic symptoms independently of a mental disorder diagnosis. A total of 224,254 subjects recruited for the World Health Organization World Health Survey were subdivided into those with both a lifetime diagnosis of psychosis and at least one psychotic symptom in the 12 months prior to the evaluation, those with at least one psychotic symptom in the past 12 months but no lifetime diagnosis of psychosis, and those without psychotic symptoms in the past 12 months and without a lifetime diagnosis of psychosis. The three groups were compared for the presence of medical conditions, health problems, and access to health care. Medical conditions and health problems (angina, asthma, arthritis, tuberculosis, vision or hearing problems, mouth/teeth problems, alcohol consumption, smoking, and accidents), medication consumption, and hospital admissions (but not regular health care visits) were more frequent in individuals with psychotic symptoms but no psychosis diagnosis, compared to those with no symptoms and no diagnosis. The number of medical conditions increased with the number of psychotic symptoms. Given the sample analyzed, this trend seems to be independent from the socio-economic development of the country or the specific health care system.

  2. The velocity width function of galaxies from the 40% ALFALFA survey: shedding light on the CDM overabundance problem

    CERN Document Server

    Papastergis, Emmanouil; Giovanelli, Riccardo; Haynes, Martha P

    2011-01-01

    The ongoing Arecibo Legacy Fast ALFA (ALFALFA) survey is a wide-area, extragalactic HI-line survey conducted at the Arecibo Observatory. Sources have so far been extracted over ~3,000 sq.deg of sky (40% of its final area), resulting in the largest HI-selected sample to date. We measure the space density of HI-bearing galaxies as a function of their observed velocity width (uncorrected for inclination) down to w = 20 km/s, a factor of 2 lower than the previous generation HIPASS survey. We confirm previous results that indicate a substantial discrepancy at low widths between the observational distribution and the theoretical one expected in a CDM Universe. In particular, a comparison with synthetic galaxy samples populating state-of-the-art CDM simulations imply a factor of ~8 difference in the abundance of galaxies with w = 50 km/s (increasing to a factor of ~100 when extrapolated to the ALFALFA limit of w = 20 km/s). We furthermore identify possible solutions, including a ~keV WDM scenario and the fact that H...

  3. The problem of underinsurance and how rising deductibles will make it worse. Findings from the Commonwealth Fund Biennial Health Insurance Survey, 2014.

    Science.gov (United States)

    Collins, Sara R; Rasmussen, Petra W; Beutel, Sophie; Doty, Michelle M

    2015-05-01

    New estimates from the Commonwealth Fund Biennial Health Insurance Survey, 2014, indicate that 23 percent of 19-to-64-year-old adults who were insured all year--or 31 million people--had such high out-of-pocket costs or deductibles relative to their incomes that they were underinsured. These estimates are statistically unchanged from 2010 and 2012, but nearly double those found in 2003 when the measure was first introduced in the survey. The share of continuously insured adults with high deductibles has tripled, rising from 3 percent in 2003 to 11 percent in 2014. Half (51%) of underinsured adults reported problems with medical bills or debt and more than two of five (44%) reported not getting needed care because of cost. Among adults who were paying off medical bills, half of underinsured adults and 41 percent of privately insured adults with high deductibles had debt loads of $4,000 or more.

  4. A Survey of Postgraduates' Scientific Research Problem Awareness%研究生科研问题意识现状调查

    Institute of Scientific and Technical Information of China (English)

    张文燕

    2016-01-01

    Doing research is the essential characteristic of postgraduate education, and finding problems is the logical starting point and core of postgraduate'sdoing scientific research.Scientific research problem awareness, as a psychological activity of finding problems, posing problems and exploring problems, is related to postgraduate'scientific research behaviors and quality directly.However, the questionnaire survey reveals that the level of postgraduate'scientific research problem awareness is intermediate presently, but the levels of postgraduate'posing problem awareness and demonstrating the value of problem awareness are relatively high while the dimensional levels of finding problem awareness and exploring problem awareness are relatively low.Moreover, the levels of male postgraduate's scientific research problem awareness and the dimensions of finding problem awareness, demonstrating the value of problem awareness and exploring problem awareness except posing problem awareness are higher than those of female postgraduates;there are no significant differences about the levels of scientific research problem awareness and every dimensional awareness between arts postgraduates and postgraduates of science and engineering;there are also no significant differences about the levels of scientific research problem awareness and every dimensional awareness except finding problem awareness between postgraduates of different grades.%科研是研究生教育的本质特征,问题是研究生科研的逻辑起点和核心,而科研问题意识,作为发现问题、提出问题和探究问题的心理活动,直接关系到研究生的科研行为和科研质量.经问卷调查发现,目前研究生科研问题意识整体水平一般,其中,提出问题意识和论证问题价值意识水平相对较高,而发现问题意识和探究问题意识水平相对较低.男生科研问题意识整体水平和除提出问题意识维度之外的其他三维度水平(发现问题意

  5. Use of Medication for the Management of Behavior Problems among Adults with Intellectual Disabilities: A Clinicians' Consensus Survey

    Science.gov (United States)

    Unwin, Gemma Louise; Deb, Shoumitro

    2008-01-01

    Current prescribing preferences among relevant experts regarding the use of psychotropic medication for the management of behavior problems in adults with intellectual disabilities in the absence of a diagnosed psychiatric illness was defined. We used a questionnaire design to synthesize the preferences of a large group, namely, clinical…

  6. Dealing with sickness certification – a survey of problems and strategies among general practitioners and orthopaedic surgeons

    Directory of Open Access Journals (Sweden)

    Nilsson Gunnar

    2007-10-01

    Full Text Available Abstract Background In order to get sickness benefit a sick-listed person need a medical certificate issued by a physician; in Sweden after one week of self-certification. Physicians experience sick-listing tasks as problematic and conflicts may arise when patients regard themselves unable to work due to complaints that are hard to objectively verify for the physician. Most GPs and orthopaedic surgeons (OS deal regularly with sick-listing issues in their daily practice. The aim of this study was to explore perceived problems and coping strategies related to tasks of sickness certification among general practitioners (GP and orthopaedic surgeons (OS. Methods A cross-sectional study about sickness certification in two Swedish counties, with 673 participating GPs and 149 OSs, who answered a comprehensive questionnaire. Frequencies together with crude and adjusted (gender and working years Odds ratios were calculated. Results A majority of the GPs and OSs experienced problems in sickness certification every week. To assess the patient's work ability, to handle situations when they and the patient had different opinions about the need for sickness absence, and to issue prolongation certificates when the previous was issued by another physician were reported as problematic by a majority in both groups. Both GPs and OSs prolonged sickness certifications due to waiting times in health care or at Social Insurance Office (SIO. To handle experienced problems they used different strategies; OSs issued sickness certificates without personal appointment more often than the GPs, who on the other hand reported having contact with SIO more often than the OSs. A higher rate of GPs experienced support from management and had a common strategy for handling sickness certification at the clinic than the OSs. Conclusion Most GPs and OSs handled sickness certification weekly and reported a variety of problems in relation to this task, generally GPs to a higher extent

  7. Discrimination and support from friends and family members experienced by people with mental health problems: findings from an Australian national survey.

    Science.gov (United States)

    Morgan, Amy J; Reavley, N J; Jorm, A F; Beatson, R

    2017-05-05

    To investigate the scope and nature of discrimination and positive treatment experienced by adults with mental health problems from their friends and family in a population-based survey. An Australian telephone-survey of 5220 adults included 1381 individuals who reported a mental health problem or scored high on a screening questionnaire. Respondents were interviewed about their experience of discrimination and positive treatment from their friends, spouse and other family members. Descriptions of experiences were content-analysed to identify key characteristics. Mental health diagnoses were primarily depression or anxiety disorders, and just over half had received treatment in the last 12 months. Positive treatment from family and friends was far more common than discrimination, reported by 74.1% of respondents. This was primarily characterised by providing emotional support and maintaining contact, as well as checking on their mental health and being a good listener. Nevertheless, discriminatory behaviours from friends and family were reported by 25.8% of respondents, with reducing or cutting contact being by far the most common. Friends and family also commonly dismissed that mental illness was real or caused suffering and showed a lack of understanding about mental health problems or treatments and how they can impact behaviour and functioning. This nationally representative study of real life experiences highlights the potential for harm or benefit from a person's social support network. Despite positive experiences being common, there is an ongoing need to reduce mental illness stigma and improve understanding of how to support a loved one with a mental health problem.

  8. Effects of phone versus mail survey methods on the measurement of health-related quality of life and emotional and behavioural problems in adolescents

    Directory of Open Access Journals (Sweden)

    Ravens-Sieberer Ulrike

    2009-12-01

    Full Text Available Abstract Background Telephone interviews have become established as an alternative to traditional mail surveys for collecting epidemiological data in public health research. However, the use of telephone and mail surveys raises the question of to what extent the results of different data collection methods deviate from one another. We therefore set out to study possible differences in using telephone and mail survey methods to measure health-related quality of life and emotional and behavioural problems in children and adolescents. Methods A total of 1700 German children aged 8-18 years and their parents were interviewed randomly either by telephone or by mail. Health-related Quality of Life (HRQoL and mental health problems (MHP were assessed using the KINDL-R Quality of Life instrument and the Strengths and Difficulties Questionnaire (SDQ children's self-report and parent proxy report versions. Mean Differences ("d" effect size and differences in Cronbach alpha were examined across modes of administration. Pearson correlation between children's and parents' scores was calculated within a multi-trait-multi-method (MTMM analysis and compared across survey modes using Fisher-Z transformation. Results Telephone and mail survey methods resulted in similar completion rates and similar socio-demographic and socio-economic makeups of the samples. Telephone methods resulted in more positive self- and parent proxy reports of children's HRQoL (SMD ≤ 0.27 and MHP (SMD ≤ 0.32 on many scales. For the phone administered KINDL, lower Cronbach alpha values (self/proxy Total: 0.79/0.84 were observed (mail survey self/proxy Total: 0.84/0.87. KINDL MTMM results were weaker for the phone surveys: mono-trait-multi-method mean r = 0.31 (mail: r = 0.45; multi-trait-mono-method mean (self/parents r = 0.29/0.36 (mail: r = 0.34/0.40; multi-trait-multi-method mean r = 0.14 (mail: r = 0.21. Weaker MTMM results were also observed for the phone administered SDQ: mono

  9. [A survey of utilization of and problems with the MSDS in chemical substances management at workplaces in Kanagawa Prefecture].

    Science.gov (United States)

    Koshi, Kimiko; Mouri, Tetuo; Sugimori, Hiroki; Numano, Takashi; Ashida, Toshifumi; Hiro, Hisanori; Miyake, Hitoshi; Fukushima, Michiko; Ishiwata, Kouichi

    2002-09-01

    Kanagawa Occupational Health Promotion Center conducted a survey on how the MSDS is utilized at workplaces with more than 50 employees handling chemical substances, and what measures are taken to help employees to thoroughly understand information in the Material Safety Data Sheet (MSDS). Questionnaires were sent out to 265 enterprises in Kanagawa prefecture, putting questions to industrial physicians and industrial hygiene supervisors. The objective of the survey was to find out how MSDS is adopted in the system to manage occupational health, what improvements the survey respondents want in MSDS and what expectations the respondents have of our center. 193 enterprises (72.8%) returned answers to the questionnaire. The major findings are as follows. (1) In many companies, information on hazardous/toxic materials is "controlled by a division using such materials", and roughly half of the companies have compiled a common list shared throughout the company. (2) For the most part suppliers submit to the MSDS. Larger companies have a higher rate of posting up or filing the MSDS at their workplaces. Only 25.8% of the companies "rewrite the MSDS so that workers can understand it." (3) Companies that carry out a hazard/toxicity assessment before introducing a new chemical substance account for 72.1%, which is higher than we expected. It indicates that even though the companies don't manage the MSDS adequately, they are highly concerned about hazard control of chemical substances. (4) The rate of answering that "the current MSDS is not easy to understand" is higher among large-sized enterprises and lower among enterprises with fewer than 300 employees. (5) Asked what improvement needs to be made on the MSDS, the industrial physicians and industrial hygiene supervisors gave same answers such as "Workers find the terminology difficult to understand." and "Levels of toxicity can't be clearly identified." (6) The respondents expect our center to provide information for the MSDS

  10. Examining impacts of allergic diseases on psychological problems and tobacco use in Korean adolescents: the 2008-2011 Korean National Health and Nutrition Examination Survey.

    Directory of Open Access Journals (Sweden)

    Yoon Hong Chun

    Full Text Available Asthma during adolescence can induce social, psychological, and behavioral problems. We examined the impact of asthma and other allergic diseases on psychological symptoms and health risk behaviors among South Korean adolescents.In this population-based cross-sectional study, 3192 adolescents (10-18 years of age participating in the 2008-2011 Korean National Health and Nutrition Examination Survey were enrolled. Psychological problems associated with clinically diagnosed asthma, allergic rhinitis, and atopic dermatitis were assessed using questionnaires and surveys. Data was analyzed using logistic regression to determine the association of depression with allergic disease while controlling for age, sex, body mass index, smoking experience, and alcohol use.Asthma and atopic dermatitis were associated with a higher prevalence of depression (17.2% and 13%, respectively. After adjusting for the covariates, asthma patients were approximately two times as likely to have depression as non-allergic participants (odds ratio, 1.81; 95% confidence interval, 1.22-2.68. Psychosocial stress significantly increased in the following order: no allergy, any allergy without asthma, asthma only, and asthma with any allergy (p for linear trend = 0.01. The asthma without other allergies group showed the highest prevalence of cigarette smoking (p = 0.007.In this study, asthma with or without other allergies was significantly related to increases in depression, psychosocial stress, and smoking experience. Thus, care should be taken to adjust treatment to account for the psychological symptoms and health risk behaviors common among asthmatic adolescents.

  11. Engineering change management report 2012: Survey results on causes and effects, current practice, problems, and strategies in Brazil

    DEFF Research Database (Denmark)

    Chucholowski, Nepomuk; Langer, Stefan; Ferreira, Marcelo Gitirana Gomes

    Engineering changes (ECs) are well known for generating additional costs and decreasing de-velopment efficiency. Yet, they are a fundamental part of product and service development and they are necessary to keep up with, for example, competitors, market trends or new technolo-gies. The effective...... management of engineering changes is a crucial precondition for Brazilian companies to successfully compete not only on the fast growing Brazilian market, but also on the world market which becomes more interesting due to the rising industrial power of Brazil. To achieve improvements in engineering change...... management practice, industry and universities need to work together. In this report the main findings of our study on Engineering Change Management (ECM) in Brazilian companies are presented, which indicate possible solution strategies and further research needs. Our survey aimed on the investigation...

  12. A retrospective survey of the use of laboratory tests to simulate internal combustion engine materials tribology problems

    Energy Technology Data Exchange (ETDEWEB)

    Blau, P.J.

    1992-12-31

    Progress in the Field of tribology strongly parallels, and has always been strongly driven by, developments and needs in transportation and related industries. Testing of candidate materials for internal combustion engine applications has historically taken several routes: (1) replacement of parts in actual engines subjected to daily use, (2) testing in special, instrumented test engines, (3) and simulative testing in laboratory tribometers using relatively simple specimens. The advantages and disadvantages of each approach are reviewed using historical examples. A four-decade, retrospective survey of the tribomaterials literature focused on the effectiveness of laboratory simulations for engine materials screening. Guidelines for designing and ducting successful tribology laboratory simulations will be discussed. These concepts were used to design a valve wear simulator at Oak Ridge National Laboratory.

  13. ETHNOBOTANICAL SURVEY OF PHOENIX DACTYLIFERA L. POLLEN USED FOR THE TREATMENT OF INFERTILITY PROBLEMS IN ALGERIAN OASES.

    Science.gov (United States)

    Selmani, Cherifa; Chabane, Djamila; Bouguedoura, Nadia

    2017-01-01

    The Phoenix dactylifera L. (date palm) is known for its traditional medicinal properties across the history of native population in Algerian Sahara. There is a large trend of consumption of date palm pollen preparations in many human infertility cases in our country. However, the validity has not been scientifically tested. There has been no direct scientific research on this application. This study was undertaken to identify cultivars with greater potential in the traditional medicine uses. To evaluate the effects of date palm pollen on some sexual behavioural parameters of male adult rats, we tested the role of pollen powder from Deglet Nour cultivar on some male reproductive parameters. An Ethnobotanical survey was conducted in 17 oases in southern Algeria to identify all cultivars with medicinal interest. Local people were interviewed with open questions. A questionnaire and personal interviews for data collection were designed to record important cultivars, parts used and preparations. To determine the active constituents of date palm pollen used in traditional medicine, a phytochemical screening was performed. The effects of oral administration of date palm pollen suspension on male adult rats were investigated on body and testicle weights, serum testosterone level. 131 prominent cultivars were found within 12 cultivars containing various parts with medicinal effects. Some primary and secondary metabolites were detected by phytochemical screening. The pollen increased the weight of the body, testicles and enhanced the serum testosterone level of male rats treated. The present survey has provided the identification and recognition of date palm cultivars used in traditional Saharan medicine. Date palm pollen could improve sexual activities in male infertility cases and may be attempted to derive drugs.

  14. What makes people decide who to turn to when faced with a mental health problem? Results from a French survey

    Directory of Open Access Journals (Sweden)

    Kovess-Masféty Viviane

    2007-07-01

    Full Text Available Abstract Background The unequal use of mental health care is a great issue, even in countries with universal health coverage. Better knowledge of the factors that have an impact on the pathway to mental health care may be a great help for designing education campaigns and for best organizing health care delivery. The objective of this study is to explore the determinants of help-seeking intentions for mental health problems and which factors influence treatment opinions and the reliance on and compliance with health professionals' advice. Methods 441 adults aged 18 to 70 were randomly selected from the general population of two suburban districts near Paris and agreed to participate in the study (response rate = 60.4%. The 412 respondents with no mental health problems based on the CIDI-SF and the CAGE, who had not consulted for a mental health problem in the previous year, were asked in detail about their intentions to seek help in case of a psychological disorder and about their opinion of mental health treatments. The links between the respondents' characteristics and intentions and opinions were explored. Results More than half of the sample (57.8% would see their general practitioner (GP first and 46.6% would continue with their GP for follow-up. Mental health professionals were mentioned far less than GPs. People who would choose their GP first were older and less educated, whereas those who would favor mental health specialists had lower social support. For psychotherapy, respondents were split equally between seeing a GP, a psychiatrist or a psychologist. People were reluctant to take psychotropic drugs, but looked favorably on psychotherapy. Conclusion GPs are often the point of entry into the mental health care system and need to be supported. Public information campaigns about mental health care options and treatments are needed to educate the public, eliminate the stigma of mental illness and eliminate prejudices.

  15. [Risky alcohol drinking surveyed at a GP unit. Secondary prevention of alcohol problems in primary care patients].

    Science.gov (United States)

    Eriksson, G; Spak, F; Andersson, C

    2000-03-08

    This article describes an implementation of secondary prevention of alcohol abuse at a GP unit in southern Gothenburg, Sweden. During several periods between 1994 and 1996, screening for alcohol problems was performed using either AUDIT or a 4-item instrument called SWAG. In one part of the study, screening was simultaneously carried out using gamma-GT and MCV. The main object of screening efforts was to stimulate interest for alcohol-related conditions, and this goal was reached. The staff was trained in treatment techniques such as motivational interviewing (MI), bio-feedback using gamma-GT and delivery of concise information. Simple methods to determine level of motivation were used for treatment stratification. Some doctors reported that they had insufficient time for adequate MI treatment, and therefore a condensed model was sometimes used. A nurse-staffed treatment unit was started and successfully promoted work with alcohol problem. Attempts were made to spread these methods to other GP units in the region and this was partially successful, although support from the central primary care administration was not secured.

  16. 青少年成长问题调查及其对策——福州市青少年成长调查%Survey and Strategies of Adolescent Problems--Survey of Adolescent Problems in Fuzhou City

    Institute of Scientific and Technical Information of China (English)

    庄家勇

    2011-01-01

    青少年时期是人生的生理发育、心理发展的关键阶段。选取了福建省福州市中学、技校、少管所、中专等典型样本的青少年(中小学生)为调查对象,采用问卷调查和访谈相结合的研究手段和方法,在深入分析有效问卷及访谈记录基础上,阐述了福州市青少年成长环境中存在的突出问题,剖析了青少年成长中不良环境的存在原因,提出了促进青少年健康成长的对策和建议。%The Period of adolescence is a key stage for physical and psychological development in one's life. Taking adolescents from Fuzhou Middle school, Technical schools, juvenile detentions, polytechnic schools as typical samples, this paper combines and carefully analyzes the methods of questionnaire and interview to explore the prominent problems in the growing environment of adolescents in Fuzhou city. This paper also explains the causes of the unfavorable conditions, bringing up some strategies and suggestions to ensure a healthy growing environment for adolescents.

  17. Gambling Participation and Problem Gambling Severity in a Stratified Random Survey: Findings from the Second Social and Economic Impact Study of Gambling in Tasmania.

    Science.gov (United States)

    Christensen, Darren R; Dowling, Nicki A; Jackson, Alun C; Thomas, Shane A

    2015-12-01

    Demographic characteristics associated with gambling participation and problem gambling severity were investigated in a stratified random survey in Tasmania, Australia. Computer-assisted telephone interviews were conducted in March 2011 resulting in a representative sample of 4,303 Tasmanian residents aged 18 years or older. Overall, 64.8% of Tasmanian adults reported participating in some form of gambling in the previous 12 months. The most common forms of gambling were lotteries (46.5%), keno (24.3%), instant scratch tickets (24.3%), and electronic gaming machines (20.5%). Gambling severity rates were estimated at non-gambling (34.8%), non-problem gambling (57.4%), low risk gambling (5.3%), moderate risk (1.8%), and problem gambling (.7%). Compared to Tasmanian gamblers as a whole significantly higher annual participation rates were reported by couples with no children, those in full time paid employment, and people who did not complete secondary school. Compared to Tasmanian gamblers as a whole significantly higher gambling frequencies were reported by males, people aged 65 or older, and people who were on pensions or were unable to work. Compared to Tasmanian gamblers as a whole significantly higher gambling expenditure was reported by males. The highest average expenditure was for horse and greyhound racing ($AUD 1,556), double the next highest gambling activity electronic gaming machines ($AUD 767). Compared to Tasmanian gamblers as a whole problem gamblers were significantly younger, in paid employment, reported lower incomes, and were born in Australia. Although gambling participation rates appear to be falling, problem gambling severity rates remain stable. These changes appear to reflect a maturing gambling market and the need for population specific harm minimisation strategies.

  18. [Possibilities and problems in the development of forensic nursing in Japan: a questionnaire survey of clinical nurses].

    Science.gov (United States)

    Kodama, Hiromi; Tsuntematsu, Kayoko; Yanai, Keiko

    2012-09-01

    Forensic nursing scientifically obtains and preserves the criminal damage from victims of domestic violence, child abuse, elder abuse, sexual violence and other related forms of violence. This was developed in North America in the 1980s, and has carried out appropriate nursing care while protecting the human rights of victims. Serious crime in Japan has been increasing, and it would seem that forensic nursing opportunities should expand as well. However, in Japan, there hasn't been much discussion about forensic nursing. Theorizing that support for clinical forensic nursing should be recognized and relevant, we carried out a survey of 581 clinical nurses to investigate the development of forensic nursing in Japan. 93 clinical nurses (16.0%) had a low level of familiarity with forensic nursing; however, 324 nurses (56.3%) had encountered patients who had suffered violence. 264 nurses (45.4%) had a feeling of wanting to be involved in forensic nursing, but were not confident with the knowledge and technology, while 144 nurses (24.8%) were concerned about the larger responsibility they would have. 400 nurses (68.8%) hoped to receive specialized knowledge and technical education. It is necessary to establish an education system for forensic nursing in accordance with the educational status-quo while considering the present state of forensic nursing education.

  19. Modified task-based learning program promotes problem-solving capacity among Chinese medical postgraduates: a mixed quantitative survey.

    Science.gov (United States)

    Tian, Yanping; Li, Chengren; Wang, Jiali; Cai, Qiyan; Wang, Hanzhi; Chen, Xingshu; Liu, Yunlai; Mei, Feng; Xiao, Lan; Jian, Rui; Li, Hongli

    2017-09-07

    Despite great advances, China's postgraduate education faces many problems, for example traditional lecture-based learning (LBL) method provides fewer oppotunities to apply knowledge in a working situation. Task-based learning (TBL) is an efficient strategy for increasing the connections among skills, knowledge and competences. This study aimed to evaluate the effect of a modified TBL model on problem-solving abilities among postgraduate medical students in China. We allocated 228 first-year postgraduate students at Third Military Medical University into two groups: the TBL group and LBL group. The TBL group was taught using a TBL program for immunohistochemistry. The curriculum consisted of five phases: task design, self-learning, experimental operations, discussion and summary. The LBL group was taught using traditional LBL. After the course, learning performance was assessed using theoretical and practical tests. The students' preferences and satisfaction of TBL and LBL were also evaluated using questionnaires. There were notable differences in the mean score rates in the practical test (P 80) in the TBL group was higher than that in the LBL group. We observed no substantial differences in the theoretical test between the two groups (P > 0.05). The questionnaire results indicated that the TBL students were satisfied with teaching content, teaching methods and experiment content. The TBL program was also beneficial for the postgraduates in completing their research projects. Furthermore, the TBL students reported positive effects in terms of innovative thinking, collaboration, and communication. TBL is a powerful educational strategy for postgraduate education in China. Our modified TBL imparted basic knowledge to the students and also engaged them more effectively in applying knowledge to solve real-world issues. In conclusion, our TBL established a good foundation for the students' future in both medical research and clinical work.

  20. Professional health care use and subjective unmet need for social or emotional problems: a cross-sectional survey of the married and divorced population of Flanders

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    Colman Elien

    2012-11-01

    Full Text Available Abstract Background The high mental health care consumption rates of divorced singles may constitute a heavy burden on the public health care system. This raises the question of whether their higher health care use stems from a greater need, or whether there are other factors contributing to these high consumption rates. We examine both health care use and subjective unmet need (perceiving a need for care without seeking it because of social or emotional problems of the divorced singles, the repartnered divorcees, and the married. Moreover, we investigate how health care use and subjective unmet need relate to each other. Methods We conduct several gender specific logistic regressions employing data from the Divorce in Flanders Survey (N men = 2884; N women = 3317. Results Results show that the divorced singles have more contact with professional health care providers (general practitioners, psychiatrists, and psychologists because of social or emotional problems, and more often perceive unmet needs. The higher health care use rates and greater subjective unmet needs can largely be attributed to higher levels of depressive symptoms. Surprisingly, we find that non-frequent health care users more often perceive a subjective unmet need than frequent health care users and those who have not contacted any health care provider. Conclusion The single divorced consult health care providers more often because of social or emotional problems and they also perceive unmet needs more often.

  1. Mental health and psychosocial problems in the aftermath of the Nepal earthquakes: findings from a representative cluster sample survey.

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    Kane, J C; Luitel, N P; Jordans, M J D; Kohrt, B A; Weissbecker, I; Tol, W A

    2017-01-09

    Two large earthquakes in 2015 caused widespread destruction in Nepal. This study aimed to examine frequency of common mental health and psychosocial problems and their correlates following the earthquakes. A stratified multi-stage cluster sampling design was employed to randomly select 513 participants (aged 16 and above) from three earthquake-affected districts in Nepal: Kathmandu, Gorkha and Sindhupalchowk, 4 months after the second earthquake. Outcomes were selected based on qualitative preparatory research and included symptoms of depression and anxiety (Hopkins Symptom Checklist-25); post-traumatic stress disorder (PTSD Checklist-Civilian); hazardous alcohol use (AUDIT-C); symptoms indicating severe psychological distress (WHO-UNHCR Assessment Schedule of Serious Symptoms in Humanitarian Settings (WASSS)); suicidal ideation (Composite International Diagnostic Interview); perceived needs (Humanitarian Emergency Settings Perceived Needs Scale (HESPER)); and functional impairment (locally developed scale). A substantial percentage of participants scored above validated cut-off scores for depression (34.3%, 95% CI 28.4-40.4) and anxiety (33.8%, 95% CI 27.6-40.6). Hazardous alcohol use was reported by 20.4% (95% CI 17.1-24.3) and 10.9% (95% CI 8.8-13.5) reported suicidal ideation. Forty-two percent reported that 'distress' was a serious problem in their community. Anger that was out of control (symptom from the WASSS) was reported by 33.7% (95% CI 29.5-38.2). Fewer people had elevated rates of PTSD symptoms above a validated cut-off score (5.2%, 95% CI 3.9-6.8), and levels of functional impairment were also relatively low. Correlates of elevated symptom scores were female gender, lower caste and greater number of perceived needs. Residing in Gorkha and Sindhupalchowk districts and lower caste were also associated with greater perceived needs. Higher levels of impaired functioning were associated with greater odds of depression and anxiety symptoms; impaired

  2. Hospital and community surveys reveal the severe public health problem and socio-economic impact of human echinococcosis in Ningxia Hui Autonomous Region, China.

    Science.gov (United States)

    Yang, Y R; Williams, G M; Craig, P S; Sun, T; Yang, S K; Cheng, L; Vuitton, D A; Giraudoux, P; Li, X; Hu, S; Liu, X; Pan, X; McManus, D P

    2006-06-01

    A comprehensive study of human echinococcosis (caused by Echinococcus granulosus or E. multilocularis), including assessment of hospital records, community surveys and patient follow-up, was conducted in Ningxia Hui Autonomous Region (NHAR), China. In contrast to hospital records that showed 96% of echinococcosis cases were caused by cystic echinococcosis (CE), 56% of cases detected in active community surveys were caused by alveolar echinococcosis (AE). The AE and CE cases co-existed frequently in the same village, even occurring in the same patient. A serious public health problem caused by echinococcosis was evident in southern NHAR, typified by: a long diagnostic history for both AE and CE (7.5 years) compared with a shorter treatment history (4.7 years); a significant mortality rate (39%) caused by AE in one surveyed village, where patients had no previous access to treatment; family aggregation of CE and AE cases; a high proportion of both AE (62.5%) and CE (58%) in females; a high rate of recurrent surgery (30%) for CE demonstrated by surgical records; and frequent symptomatic recurrences (51%) because of discontinuous or sporadic access to chemotherapy for AE. The disease burden for both human AE and CE is thus very severe among these rural communities in NHAR, and this study provides the first attempt to determine the costs of morbidity and surgical intervention of human CE and AE cases both at the hospital and community level in this setting. This information may be useful for assessing the cost effectiveness of designing effective public health programs to control echinococcosis in this and other endemic areas in China and elsewhere.

  3. [Survey of carbon fiber reinforced plastic orthoses and occupational and medical problems based on a questionnaire administered to companies involved in the manufacture of prosthetics and orthotics].

    Science.gov (United States)

    Kaneshiro, Yuko; Furuta, Nami; Makino, Kenichiro; Wada, Futoshi; Hachisuka, Kenji

    2011-09-01

    We surveyed carbon fiber reinforced plastic orthoses (carbon orthoses) and their associated occupational and medical problems based on a questionnaire sent to 310 companies which were members of the Japan Orthotics and Prosthetics Association. Of all the companies, 232 responded: 77 of the 232 companies dealt with ready-made carbon orthoses, 52 dealt with fabricated custom-made orthoses, and 155 did not dealt with carbon orthoses. Although the total number of custom-made carbon ortheses in Japan was 829/ 5 years, there was a difference by region, and one company fabricated only 12 (per 5 years) custom-made carbon orthoses on average. The advantages of the carbon orthosis were the fact that it was "light weight", "well-fitted", had a "good appearance", and "excellent durability", while the disadvantages were that it was "expensive", "high cost of production", of "black color", and required a "longer time for completion", and "higher fabrication techniques". From the standpoint of industrial medicine, "scattering of fine fragments of carbon fibers", "itching on the skin" and "health hazards" were indicated in companies that manufacture the orthosis. In order to make the carbon orthosis more popular, it is necessary to develop a new carbon material that is easier to fabricate at a lower cost, to improve the fabrication technique, and to resolve the occupational and medical problems.

  4. [Mental Problems, Mood and Anxiety Disorders in The Population Displaced by Violence in Colombia; Results of The National Mental Health Survey 2015].

    Science.gov (United States)

    Tamayo Martínez, Nathalie; Rincón Rodríguez, Carlos Javier; de Santacruz, Cecilia; Bautista Bautista, Nubia; Collazos, Jaime; Gómez-Restrepo, Carlos

    2016-12-01

    Colombia has a large population exposed to violence. Our data suggest a significant number displaced by the conflict. As there is an increased risk of vulnerability, their problems and mental disorders need to be assessed in order to determine specific treatments. To determine the prevalence of problems and mental disorders in those internally displaced by the conflict. Data was obtained from the National Mental Health Survey 2015. The diagnostic tools used were the composite international diagnosis interview (CIDI-CAPI), Self-reporting questionnaire (SQR). Alcohol consumption was assessed with the Alcohol Use Disorders Identification test (AUDIT). A survey based on the Alcohol, Smoking and Substance Involvement Screening Test (ASSIST) was developed. The modified Post-traumatic Stress Disorder (PTSD) Checklist-Civilian version (PCL-C) was used to determine possible post-traumatic stress Disorder. Multidimensional poverty index (MPI) and Family-Apgar questionnaire were applied to general individual and household data. A total of 943 persons displaced by the conflict were reported, with self-report of symptoms in 16.4% (95% CI, 13.2-20.1). The prevalence of any of the measured mental disorders (CIDI-CAPI) ever in life was 15.9% (95% CI, 11.9-21.1), with a suicidal ideation of 12.5% (95%CI, 9.0-17.1), and excessive alcohol consumption in 10.1% (95% CI, 7.2-13.9). More than one-third (35.6%, (95% CI, 30.7-40.8) of people report having experienced, witnessed, or been told that someone close had had a traumatic event related to the armed conflict. An increased risk of PTSD is reported by 3.6% (95% CI, 2.2-5.9) displaced people that had reported at least one traumatic event. Family dysfunction in the displaced population is absent (74.8% (95%.CI, 70.4-78.8). The displaced population has a high prevalence of problems and mental disorders, which confirms their disadvantaged situation. Copyright © 2016 Asociación Colombiana de Psiquiatría. Publicado por Elsevier Espa

  5. Exposure-response relationship of wind turbine noise with self-reported symptoms of sleep and health problems: A nationwide socioacoustic survey in Japan.

    Science.gov (United States)

    Kageyama, Takayuki; Yano, Takashi; Kuwano, Sonoko; Sueoka, Shinichi; Tachibana, Hideki

    2016-01-01

    The association of wind turbine noise (WTN) with sleep and physical/mental health has not been fully investigated. To investigate the relationship of WTN with the prevalence of self-reported symptoms of sleep and health problems, a socioacoustic survey of 1079 adult residents was conducted throughout Japan (2010-2012): 747 in 34 areas surrounding wind turbine plants and 332 in 16 control areas. During face-to-face interviews, the respondents were not informed of the purpose of the survey. Questions on symptoms such as sleeplessness and physical/mental complaints were asked without specifying reasons. Insomnia was defined as having one or any combination of the following that occurs three or more times a week and bothers a respondent: Difficulty initiating sleep, difficulty maintaining sleep, premature morning awakening, and feeling of light overnight sleep. Poor health was defined as having high scores for health complaints, as determined using the Total Health Index, exceeding the criteria proposed by the authors of the index. The noise descriptor for WTN was LAeq,n outdoor, estimated from the results of actual measurement at some locations in each site. Multiple logistic analysis was applied to the LAeq,n and insomnia or poor health. The odds ratio (OR) of insomnia was significantly higher when the noise exposure level exceeded 40 dB, whereas the self-reported sensitivity to noise and visual annoyance with wind turbines were also independently associated with insomnia. OR of poor health was not significant for noise exposure, but significant for noise sensitivity and visual annoyance. The above two moderators appear to indicate the features of respondents who are sensitive to stimuli or changes in their homeostasis.

  6. Exposure-response relationship of wind turbine noise with self-reported symptoms of sleep and health problems: A nationwide socioacoustic survey in Japan

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    Takayuki Kageyama

    2016-01-01

    Full Text Available The association of wind turbine noise (WTN with sleep and physical/mental health has not been fully investigated. To investigate the relationship of WTN with the prevalence of self-reported symptoms of sleep and health problems, a socioacoustic survey of 1079 adult residents was conducted throughout Japan (2010-2012: 747 in 34 areas surrounding wind turbine plants and 332 in 16 control areas. During face-to-face interviews, the respondents were not informed of the purpose of the survey. Questions on symptoms such as sleeplessness and physical/mental complaints were asked without specifying reasons. Insomnia was defined as having one or any combination of the following that occurs three or more times a week and bothers a respondent: Difficulty initiating sleep, difficulty maintaining sleep, premature morning awakening, and feeling of light overnight sleep. Poor health was defined as having high scores for health complaints, as determined using the Total Health Index, exceeding the criteria proposed by the authors of the index. The noise descriptor for WTN was LAeq,n outdoor, estimated from the results of actual measurement at some locations in each site. Multiple logistic analysis was applied to the LAeq,n and insomnia or poor health. The odds ratio (OR of insomnia was significantly higher when the noise exposure level exceeded 40 dB, whereas the self-reported sensitivity to noise and visual annoyance with wind turbines were also independently associated with insomnia. OR of poor health was not significant for noise exposure, but significant for noise sensitivity and visual annoyance. The above two moderators appear to indicate the features of respondents who are sensitive to stimuli or changes in their homeostasis.

  7. Psychosocial health problems associated with increased HIV risk behavior among men who have sex with men in Nepal: a cross-sectional survey.

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    Keshab Deuba

    Full Text Available BACKGROUND: Men who have sex with men (MSM are marginalized, hidden, underserved and at high risk for HIV in Nepal. We examined the association between MSM sub-populations, psychosocial health problems and support, access to prevention and non-use of condoms. METHODS: Between September-November of 2010, a cross-sectional survey on HIV-related risk behavior was performed across Nepal through snowball sampling facilitated by non-governmental organizations, recruiting 339 MSM, age 15 or older. The primary outcomes were: (a non-use of condoms at least once in last three anal sex encounters with men and (b non-use of condoms with women in the last encounter. The secondary outcome was participation in HIV prevention interventions in the past year. RESULTS: Among the 339 MSM interviewed, 78% did not use condoms at their last anal sex with another man, 35% did not use condoms in their last sex with a woman, 70% had experienced violence in the last 12 months, 61% were experiencing depression and 47% had thought of committing suicide. After adjustment for age, religion, marital status, and MSM subpopulations (bisexual, ta, meti, gay, non-use of condoms at last anal sex with a man was significantly associated with non-participation in HIV interventions, experience of physical and sexual violence, depression, repeated suicidal thoughts, small social support network and being dissatisfied with social support. Depression was marginally associated with non-use of condoms with women. The findings suggest that among MSM who reported non-use of condoms at last anal sex, the ta subgroup and those lacking family acceptance were the least likely to have participated in any preventive interventions. CONCLUSIONS: MSM in Nepal have a prevalence of psychosocial health problems in turn associated with high risk behavior for HIV. Future HIV prevention efforts targeting MSM in Nepal should cover all MSM subpopulations and prioritize psychosocial health interventions.

  8. Analysis of surveying and legal problems in granting right-of-way and expropriation for the purpose of locating technical infrastructure

    Science.gov (United States)

    Trembecka, Anna

    2016-06-01

    A condition which determines the location of technical infrastructure is an entrepreneur holding the right to use the property for construction purposes. Currently, there are parallel separate legal forms allowing the use of a real property for the purpose of locating transmission lines, i.e. transmission easement (right-of-way) established under the civil law and expropriation by limiting the rights to a property under the administrative law. The aim of the study is to compare these forms conferring the right to use real properties and to analyze the related surveying and legal problems occurring in practice. The research thesis of the article is ascertainment that the current legal provisions for establishing legal titles to a property in order to locate transmission lines need to be amended. The conducted study regarded legal conditions, extent of expropriation and granting right-of-way in the city of Krakow, as well as the problems associated with the ambiguous wording of the legal regulations. Part of the research was devoted to the form of rights to land in order to carry out similar projects in some European countries (France, Czech Republic, Germany, Sweden). The justification for the analysis of these issues is dictated by the scale of practical use of the aforementioned forms of rights to land in order to locate technical infrastructure. Over the period of 2011-2014, 651 agreements were concluded on granting transmission right-of-way for 967 cadastral parcels owned by the city of Krakow, and 105 expropriation decisions were issued, limiting the use of real properties in Krakow.

  9. Adult attention deficit hyperactivity disorder symptom profiles and concurrent problems with alcohol and cannabis: sex differences in a representative, population survey.

    Science.gov (United States)

    Kolla, Nathan J; van der Maas, Mark; Toplak, Maggie E; Erickson, Patricia G; Mann, Robert E; Seeley, Jane; Vingilis, Evelyn

    2016-02-27

    Adult attention deficit hyperactivity disorder (ADHD) shows a robust association with alcohol and cannabis misuse, and these relationships are expressed differently in males and females. Manifestation of specific ADHD symptom profiles, even in the absence of the full disorder, may also be related to problems with alcohol and cannabis, although these relationships have not been investigated in epidemiological studies. To address this question, we studied the sex-specific associations of ADHD symptomatology with problematic alcohol and cannabis use in a representative sample of adults aged 18 years and older residing in Ontario, Canada. Data were obtained from the Centre for Addiction and Mental Health Monitor, an ongoing cross-sectional telephone survey, between January 2011 and December 2013. Respondents (n =  5080) reported on current ADHD symptomatology, measured using the Adult ADHD Self-Report Version 1.1 Screener (ASRS-V1.1) and four additional items, and alcohol and cannabis use, which were measured using the Alcohol Use Disorders Identification Test (AUDIT) and the Alcohol, Smoking and Substance Involvement Screening Test (ASSIST), respectively. Logistic regression analyses were conducted in men and women to test the association of each ADHD symptom cluster (hyperactivity, inattentiveness, impulsivity) with problematic alcohol and cannabis use. After controlling for age, education, and comorbid internalizing and externalizing psychopathology, hyperactive symptoms were associated with problematic alcohol use in both men and women and with problematic cannabis use in men. Impulsive symptoms were independently associated with problematic cannabis use in men. By contrast, inattentive symptomatology predicted problems with alcohol and cannabis only in women. In all models, age was negatively associated with substance misuse and externalizing behavior was positively correlated and the strongest predictor of hazardous alcohol and cannabis use. ADHD symptom

  10. Enduring sleep complaints predict health problems: a six-year follow-up of the survey of health and retirement in Europe.

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    Grossman, Ephraim S

    2017-11-01

    Sleep complaints are common and enduring among old people. The study aimed to extend current knowledge by exploring the effects of episodic versus chronic sleep complaints on a range of physical and mental health outcomes. Older adults (N = 8934, mean age = 64) who participated in Waves 1, 2 and 4 of the Survey of Health, Ageing and Retirement in Europe (SHARE) reported sleep and health outcome measures. Episodic sleep complaints, in the first or in the second wave and chronic sleep complaints, in both waves were recorded. Outcomes in Wave 4 included physical symptoms, difficulties in activities of daily living and low quality of life. Logistic regressions examined whether episodic and chronic sleep complaints at W1 and W2 predict W4 health outcomes. Chronic sleep complaints predicted worse outcomes, compared to no sleep difficulties and to episodic sleep complaints, even after adjusting for demographic characteristics and previous levels of health. Sleep complaints and mainly chronic sleep complaints are related to elevated risk of future health and functional problems. Caregivers are encouraged to address sleep complaints and provide their older patients with help before sleep complaints become persistent.

  11. Migrant workers’ occupation and healthcare-seeking preferences for TB-suspicious symptoms and other health problems: a survey among immigrant workers in Songkhla province, southern Thailand

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    Naing Tinzar

    2012-10-01

    Full Text Available Abstract Background Much of the unskilled and semi-skilled workforce in Thailand comprises migrant workers from neighbouring countries. While, in principle, healthcare facilities in the host country are open to those migrants registered with the Ministry of Labour, their actual healthcare-seeking preferences and practices, as well as those of unregistered migrants, are not well documented. This study aimed to describe the patterns of healthcare-seeking behaviours of immigrant workers in Thailand, emphasizing healthcare practices for TB-suspicious symptoms, and to identify the role of occupation and other factors influencing these behaviours. Methods A survey was conducted among 614 immigrant factory workers (FW, rubber tappers (RT and construction workers (CW, in which information was sought on socio-demography, history of illness and related healthcare-seeking behaviour. Mixed effects logistic regression modeling was employed in data analysis. Results Among all three occupations, self-medication was the most common way of dealing with illnesses, including the development of TB-suspicious symptoms, for which inappropriate drugs were used. Only for GI symptoms and obstetric problems did migrant workers commonly seek healthcare at modern healthcare facilities. For GI illness, FW preferred to attend the in-factory clinic and RT a private facility over government facilities owing to the quicker service and greater convenience. For RT, who were generally wealthier, the higher cost of private treatment was not a deterrent. CW preferentially chose a government healthcare facility for their GI problems. For obstetric problems, including delivery, government facilities were utilized by RT and CW, but most FW returned to their home country. After adjusting for confounding, having legal status in the country was associated with overall greater use of government facilities and being female and being married with use of both types of modern healthcare

  12. Days out-of-role due to common physical and mental health problems: Results from the Sao Paulo Megacity Mental Health Survey, Brazil

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    Laura Helena Andrade

    2013-11-01

    Full Text Available OBJECTIVES: To investigate the relative importance of common physical and mental disorders with regard to the number of days out-of-role (DOR; number of days for which a person is completely unable to work or carry out normal activities because of health problems in a population-based sample of adults in the São Paulo Metropolitan Area, Brazil. METHODS: The São Paulo Megacity Mental Health Survey was administered during face-to-face interviews with 2,942 adult household residents. The presence of 8 chronic physical disorders and 3 classes of mental disorders (mood, anxiety, and substance use disorders was assessed for the previous year along with the number of days in the previous month for which each respondent was completely unable to work or carry out normal daily activities due to health problems. Using multiple regression analysis, we examined the associations of the disorders and their comorbidities with the number of days out-of-role while controlling for socio-demographic variables. Both individual-level and population-level associations were assessed. RESULTS: A total of 13.1% of the respondents reported 1 or more days out-of-role in the previous month, with an annual median of 41.4 days out-of-role. The disorders considered in this study accounted for 71.7% of all DOR; the disorders that caused the greatest number of DOR at the individual-level were digestive (22.6, mood (19.9, substance use (15.0, chronic pain (16.5, and anxiety (14.0 disorders. The disorders associated with the highest population-attributable DOR were chronic pain (35.2%, mood (16.5%, and anxiety (15.0% disorders. CONCLUSIONS: Because pain, anxiety, and mood disorders have high effects at both the individual and societal levels, targeted interventions to reduce the impairments associated with these disorders have the highest potential to reduce the societal burdens of chronic illness in the São Paulo Metropolitan Area.

  13. Seeking informal and formal help for mental health problems in the community: a secondary analysis from a psychiatric morbidity survey in South London.

    Science.gov (United States)

    Brown, June; Evans-Lacko, Sara; Aschan, Lisa; Henderson, Max J; Hatch, Stephani L; Hotopf, Matthew

    2014-10-08

    BackgroundOnly 30-35% of people with mental health problems seek help from professionals. Informal help, usually from friends, family and religious leaders, is often sought but is under-researched. This study aimed to contrast patterns of informal and formal help-seeking using data from a community psychiatric morbidity survey (n=1692) (South East London Community Health (SELCOH) Study).MethodsPatterns of help-seeking were analysed by clinical, sociodemographic and socioeconomic indicators. Factors associated with informal and formal help-seeking were investigated using logistic regression. Cross-tabulations examined informal help-seeking patterns from different sources.Results`Cases¿ (n = 386) were participants who had scores of ¿ 12 on the Revised Clinical Interview Schedule (CIS-R), indicating a common mental disorder. Of these, 40.1% had sought formal help, (of whom three-quarters (29%) had also sought informal help), 33.6% had sought informal help only and only 26.3% had sought no help. When controlling for non-clinical variables, severity, depression, suicidal ideas, functioning and longstanding illnesses were associated with formal rather than informal help-seeking. Age and ethnic group influenced sources of informal help used. Younger people most frequently sought informal help only whereas older people tended to seek help from their family. There were ethnic group differences in whether help was sought from friends, family or religious leaders.ConclusionsThis study has shown how frequently informal help is used, whether in conjunction with formal help or not. Among the `cases¿, over 60% had sought informal help, whether on its own or together with formal help. Severity was associated with formal help-seeking. Patterns of informal help use have been found. The use and effectiveness of informal help merit urgent research.

  14. Snakebites in Two Rural Districts in Lao PDR: Community-Based Surveys Disclose High Incidence of an Invisible Public Health Problem.

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    Inthanomchanh Vongphoumy

    Full Text Available The Lao PDR (Laos is one of the least developed countries in Asia with an estimated 25% of the population living in poverty. It is the habitat of some highly venomous snakes and the majority of the population earns their living from agricultural activities. Under these circumstances the incidence of snakebites is expected to be high.Two cross-sectional, community-based surveys were performed in Champone and Phin district, Savannakhet province, Lao PDR to estimate snakebite incidence. Multistage random sampling was used. In the first stage approximately 40% of all villages in each district were randomly selected. In the second stage 33% of all households in each village were randomly chosen. Members of the selected households were interviewed about snakebites during the previous 12 months.Thirty-five of 9856 interviewees reported a snakebite in a 12 month period in Champone district and 79 of 7150 interviewees in Phin district. The estimated incidence is 355 snakebites per 100,000 persons per year and 1105 per 100,000 in Champone and Phin district respectively. All snakebite victims received treatment by traditional healers or self-treatment at home and nobody went to a hospital. Incidence of snakebites, calculated on the basis of hospital records of 14 district hospitals and Savannakhet provincial hospital, ranged from 3 to 14 cases per 100,000 persons per year between 2012 and 2014.Incidence of snakebites is high in rural communities in Laos with significant regional differences. Poverty most likely contributes significantly to the higher number of snakebites in Phin district. Hospital statistics profoundly underestimates snakebite incidence, because the majority of snakebite victims receive only treatment by traditional healers or self-treatment in their village. There is an urgent need to train medical staff and students in management of snakebite patients and make snake antivenom available to cope effectively with this important public

  15. Interpretation of an airborne geophysical survey in southern Paris Basin: towards a lithological cartography, key tool for the management of shrinking/swelling clay problems

    Science.gov (United States)

    Prognon, F.; Tourliere, B.; Perrin, J.; Lacquement, F.; Martelet, G.; Deparis, J.; Gourdier, S.; Drufin, S.

    2011-12-01

    Regolith formations support a full spectrum of human activities. Among others, they provide a source of extractable materials and form the substratum of soils. As such, they should be considered as a capital to be managed and protected. Moreover, one of the main challenges for present and future land settlement is to prevent house building programs from being planned inside shrink-swell risky areas which is only possible thanks to an complete lithological mapping of the french regolith. We illustrate here the results of the geological interpretation of an airborne geophysical survey carried out in "Région Centre" administrative region in the southern part of the Paris Basin, in France. Among other techniques, airborne geophysics is appropriate to quickly provide information on near surface, because of i) its high spatial coverage ii) the rapidity of acquisition and iii) the variety of available sensors (magnetic, spectral radiometry, electromagnetic...). Spectral radiometry data were collected with a line spacing of 1 km. This method provides maps of potassium (K), uranium (U) and thorium (Th) which are the only naturally occurring elements with direct or indirect radioisotopes that produce gamma rays of sufficient intensity to be measured at airborne survey heights. On the radiometric data we applied the HAC (Hierarchical Ascendant Classification) computation procedure: taking into account several variables, the statistical HAC method groups individuals based on their resemblance. Also in this study, calibrated Total Count channel (TCm) is compared to an estimated dose rate (TCe) computed from the measured radioelement abundances: TCe = 13.078 * K + 5.675 * U + 2.494 * Th. Our results show that the ratio TCe/TCm came out to be a good indicator of ground property changes within Sologne mixed sandy-clay environment. Processed geophysical data are cross-checked with geological data (from field observations) and field or laboratory measurements of mineralogical data

  16. The dopamine receptor D4 gene and familial loading interact with perceived parenting in predicting externalizing behavior problems in early adolescence: the TRacking Adolescents' Individual Lives Survey (TRAILS)

    NARCIS (Netherlands)

    Marsman, R.; Oldehinkel, A.J.; Ormel, J.; Buitelaar, J.K.

    2013-01-01

    Although externalizing behavior problems show in general a high stability over time, the course of externalizing behavior problems may vary from individual to individual. Our main goal was to investigate the predictive role of parenting on externalizing behavior problems. In addition, we investigate

  17. The dopamine receptor D4 gene and familial loading interact with perceived parenting in predicting externalizing behavior problems in early adolescence : The TRacking Adolescents' Individual Lives Survey (TRAILS)

    NARCIS (Netherlands)

    Marsman, Rianne; Oldehinkel, Albertine J.; Ormel, Johan; Buitelaar, Jan K.

    2013-01-01

    Although externalizing behavior problems show in general a high stability over time, the course of externalizing behavior problems may vary from individual to individual. Our main goal was to investigate the predictive role of parenting on externalizing behavior problems. In addition, we investigate

  18. Surveying Humaness

    DEFF Research Database (Denmark)

    Markussen, Randi; Gad, Christopher

    Christopher Gad. Ph.d. Dept. of Information and Media Studies Randi Markussen. Associate Professor, Dept. of Information and Media Studies. rmark@imv.au.dk   Abstract:   Surveying humanness -politics of care improvement   For various reasons we both were subjected to a specific survey procedure...... and development of a large collection of biological and psychological symptoms and psycho-social problems. However, the surveys say nothing about how the information will be of use to the people who answer the procedure or how this scientific intervention will be put to use more specifically within the public...... carried out in a Danish county in order to improve treatment of people who have suffered from long-term illnesses. The surveys concern not only feed back on how people experience their present and past interaction with the social services and health care system; they also ask people to indicate the state...

  19. Surveying Humaness

    DEFF Research Database (Denmark)

    Markussen, Randi; Gad, Christopher

    Christopher Gad. Ph.d. Dept. of Information and Media Studies Randi Markussen. Associate Professor, Dept. of Information and Media Studies. rmark@imv.au.dk   Abstract:   Surveying humanness -politics of care improvement   For various reasons we both were subjected to a specific survey procedure...... and development of a large collection of biological and psychological symptoms and psycho-social problems. However, the surveys say nothing about how the information will be of use to the people who answer the procedure or how this scientific intervention will be put to use more specifically within the public...... be imagined as a positive end, as ‘making explicit’ (in a popular psychological perspective) is considered to be therapeutic and good in itself? We will discuss those questions from a Foucaultian and ANT perspective, where one does not accept that pre-existing subjects are exposed to survey procedures...

  20. Self-Reported Health and Behavioral Problems among Adolescent Victims of Rape in France: Results of a Cross-Sectional Survey.

    Science.gov (United States)

    Choquet, Marie; Darves-Bornoz, Jean-Michel; Ledoux, Sylvie; Manfredi, Robert; Hassler, Christine

    1997-01-01

    Comparison of 61 self-identified rape victims in France with 122 nonvictims found a prevalence rate of rape of 0.9% for girls, 0.6% for boys and a relationship between rape and current sleep difficulties, depressive symptoms, somatic complaints, tobacco consumption, and behavior problems. Additional problems for male victims included attempted…

  1. Technological Implementation of Renewable Energy in Rural-Isolated Areas and Small-Medium Islands in Indonesia: Problem Mapping And Preliminary Surveys of Total People Participation in a Local Wind Pump Water Supply

    Science.gov (United States)

    Taufik, Ahmad

    2007-10-01

    This article discusses a formulation of problem mapping and preliminary surveys of total people participation in a local wind pump (LWP) water supply in term of technological implementation of renewable energy (RE) in rural-isolated areas and small-medium islands in Indonesia. The formulation was constructed in order to enhance and to promote the local product of RE across Indonesia. It was also addressed to accommodate local potencies, barriers and opportunities into a priority map. Moreover, it was designed into five aspects such as (1) local technology of the RE: a case of pilot project of the LWP; (2) environmental-cultural aspects related to global issues of energy-renewable energy; (3) potencies and barriers corresponding to local, national, regional and international contents; (4) education and training and (5) gender participation. To focus the formulation, serial preliminary surveys were conducted in five major areas, namely: (1) survey on support and barrier factors of the aspects; (2) strategic planning model, a concept A-B-G which stands for Academician-Business people-Government; (3) survey on background based knowledge on energy conservation; (4) survey on gender participation in energy conservation and (5) survey on local stakeholder involvement. Throughout the surveys, it has been notified that the concept needs to be developed to any level of its component since its elements were identified in tolerance values such as high potency value of the LWP development (95%); a strong potency of rural area application (88%); a medium background of energy, energy conservation (EC) identified in a range of 56%-72%, sufficient support from local stakeholders and gender participation.

  2. Ant Colony Algorithm Combined with Survey Propagation for Satisfiability Problem%调查传播算法和蚁群算法相结合求解可满足性问题

    Institute of Scientific and Technical Information of China (English)

    王芙; 周育人; 叶立

    2012-01-01

    布尔可满足性问题(Boolean Satisfiability Problem,SAT)是逻辑学的一个基本问题,也是NP-hard问题.调查传播算法(Survey Propagation,SP)是求解SAT的一种非常高效的算法,但SP在难解区域极易不收敛,或者出现错误赋值.将SP算法与蚁群算法结合,把SP算法得到的消息值应用到蚁群算法中来求解3-SAT问题,使用这些消息值引导蚁群算法求解,并在算法中加入高效的局部搜索.新算法对于SP算法不收敛的一些实例也能很快找到解.%Satisfiability problem is a basic problem in logic,and also is NP-hard. Survey propagation(SP) is a very effective algorithm for this problem. However, SP tends not to converge in hard region, or gives wrong assignments to the variables. An algorithm combined with SP and ant colony optimization(ACO) was proposed The messages calculated in SP were used in ACO as guidance to help ACO find a solution. And local search was conducted in the new algorithm. The new algorithm can quickly find solutions for some instances that SP doesn't work.

  3. IT Barometer survey, Denmark

    DEFF Research Database (Denmark)

    Howard, Rob

    1998-01-01

    Survey results from Danish architects, engineers, contractors and property managers in the construction industry concerning their use of computers, communications, problems and needs.......Survey results from Danish architects, engineers, contractors and property managers in the construction industry concerning their use of computers, communications, problems and needs....

  4. Brexit bleibt vor allem europäisches Problem: Ergebnisse einer Sonderfrage im jüngsten Ifo World Economic Survey

    OpenAIRE

    Boumans, Dorine

    2016-01-01

    Um die Auswirkungen des Brexit-Votums auf die Weltwirtschaft zu beleuchten, wurden im Juli die Teilnehmer des Ifo World Economic Survey zu den kurz- und mittelfristigen ökonomischen Auswirkungen eines Brexit in ihrem Land befragt. Die Ergebnisse der Sonderfrage geben ein differenziertes Bild. Vor allem für die EU 15 werden kurzfristige signifikante ökonomische Konsequenzen erwartet.

  5. The Problem of Indian Administration. Report of a Survey Made at the Request of Honorable Hubert Work, Secretary of the Interior, and Submitted to Him, February 21, 1928.

    Science.gov (United States)

    Meriam, Lewis, Comp.; And Others

    The report, generally known as the Meriam Report, is a survey of the economic and social conditions of the American Indians during the 1920's. Data was collected by field work for approximately 7 months. One or more members of the investigating staff visited 95 different jurisdictions, either reservations, Indian agencies, hospitals, or schools…

  6. Family physicians' involvement and self-reported comfort and skill in care of children with behavioral and emotional problems: a population-based survey

    OpenAIRE

    Klassen Anne F; Johnston Charlotte; Miller Anton R; Fine Stuart; Papsdorf Michael

    2005-01-01

    Abstract Background Little is known about general and family practitioners' (GP/FPs') involvement and confidence in dealing with children with common psychosocial problems and mental health conditions. The aims of this study were to ascertain GP/FPs' preferred level of involvement with, and perceived comfort and skill in dealing with children with behavioral problems, social-emotional difficulties, attention-deficit/hyperactivity disorder (ADHD), and mood disorders; and to identify factors as...

  7. The Congruence Subgroup Problem

    Indian Academy of Sciences (India)

    M S Raghunathan

    2004-11-01

    This is a short survey of the progress on the congruence subgroup problem since the sixties when the first major results on the integral unimodular groups appeared. It is aimed at the non-specialists and avoids technical details.

  8. Researches regarding a constructing problem of a PV system. Part 1. Conscious investigation by means of a questionnaire survey; Taiyoko hatsuden system ni okeru kenchikuteki shomondai no kenkyu. 1. Anketo chosa ni yoru ishiki chosa

    Energy Technology Data Exchange (ETDEWEB)

    Nakajima, Y.; Yamazaki, R.; Kuroki, T. [Kogakuin University, Tokyo (Japan)

    1996-10-27

    The installation and introduction of photovoltaic power generation systems (PVS) in buildings are growingly expected in the construction field from now, coupled with the marketing of a solar cell module as a product for a construction material in the form of an external wall or a roof material for example. For this purpose, it is necessary at first to summarize problems that may arise at the time of or after the installation of PVS as a product. This paper examines an opinion poll, degree of recognition, current problems, etc., of PVS as a result of a questionnaire survey given to engineers and architects engaged in the actual construction business. The degree of recognition and interest was very high. Consultation or request for PVS installation was much more than predicted in numbers. Roughly 50% of the respondents reacted positively for the future installation request of PVS and, combined with the respondents who answered to look into the installation tentatively, not less than 90% were of a forward-looking opinion. The 85% of the respondents was not aware of the monitor business system for residential PVS. Further, the survey clearly brought out the importance of cost problems. 1 ref., 11 figs., 3 tabs.

  9. Serious diabetes-specific emotional problems and depression in a Croatian-Dutch-English Survey from the European Depression in Diabetes [EDID] Research Consortium

    DEFF Research Database (Denmark)

    Pouwer, Francois; Skinner, Timothy Chas; Pibernik-Okanovic, Mirjana

    2005-01-01

    for Epidemiological Studies Depression and the Problem Areas in Diabetes scales. Percentages of patients with high depression scores were: 39 and 34% (Croatian men and women), 19 and 21% (Dutch men and women), 19 and 39% (English men and women). Moreover, 79% (Croatian), 47% (Dutch) and 41% (English) of the patients......It has been hypothesized that coverage of diabetes-specific issues (e.g. coping with complications, incapacity, pain) during psychotherapy may optimize the likelihood of treatment success for depression in patients with diabetes. However, it is still unclear how often depression is confounded...... by diabetes-specific emotional problems. We aim to determine the levels of diabetes-specific emotional problems in diabetic individuals with high versus low levels of depression in a sample of 539 outpatients with diabetes (202 Dutch, 185 Croatian and 152 English). Subjects completed the Center...

  10. 肥胖中学生行为问题调查%Surveys of behavior problems in obese middle school students

    Institute of Scientific and Technical Information of China (English)

    谢海岩; 郭沛彩; 田建华; 古丽; 盖广庆

    2015-01-01

    Objective To explore behavior problems in obese middle school students in order to provide basis for school health education .Methods A total of 992 students were assigned to obesity (n=108) ,overweight (n=182) and nor‐mal group (n= 702) according to body mass index (BMI) .Assessments were conducted with the Youth Self‐Report (YSR) among students of 3 groups .Results There were very sig‐nificant differences in other problem score of the YSR among 3 groups (P<0 .01) ,other problem score was significantly lower in normal than obesity group (P<0 .01) .The BMIs of middle school students were positively related to the total ,physical complaints ,anxiety‐depression ,social behavior ,violating discipline behavior ,aggressive behavior and other problem score of the YRS notably (P<0 .05 or 0 .01) .Conclusion There are no obvious differences in behavior problems among middle school students with different body mass ,but obese students’ obvious diet ,sleep and safety problems should be concerned .%目的:探讨肥胖中学生的行为问题,为学校健康教育提供依据。方法将992名学生根据体质量指数分为3组,肥胖组108名,超重组182名,正常组702名。对3组中学生采用青少年自评量表进行测评分析。结果3组中学生自评量表的其他问题维度分比较差异有极显著性(P<0.01),其中正常组其他问题维度分显著低于肥胖组(P<0.01)。中学生体质量指数与青少年自评量表总分及躯体主诉、焦虑抑郁、社交行为、违纪行为、攻击行为、其他问题维度分呈显著正相关( P<0.05或0.01)。结论不同体质量中学生的行为问题差异不明显,但肥胖中学生存在明显的饮食、睡眠、安全感等问题应引起关注。

  11. What is Bobath? A survey of UK stroke physiotherapists' perceptions of the content of the Bobath concept to treat postural control and mobility problems after stroke

    OpenAIRE

    Tyson, Sarah F; Connell, L. A.; Busse, M E; Lennon, S.

    2009-01-01

    Objective. The aim of this study was to identify which interventions used to treat postural control and mobility are considered part of the Bobath concept (BC). Design. Hospital-based UK stroke physiotherapists identified interventions which they perceived to be part of the BC from a pre-published list of interventions used to treat postural control and mobility problems. Interventions that >75% of participants felt were part of the BC were classified as 'definitely Bobath'. Interventions ...

  12. The influence of stigma on first aid actions taken by young people for mental health problems in a close friend or family member: findings from an Australian national survey of youth.

    Science.gov (United States)

    Yap, Marie Bee Hui; Jorm, Anthony Francis

    2011-11-01

    Young people are an important source of first aid for mental health problems in people they are close to, but their first aid skills remain inadequate. Research into the factors that influence mental health first aid skills are required to reveal targets for improving these skills. This study examined the influence of stigma on first aid actions taken by young people to help someone close to them with a mental health problem. Participants in a national telephone survey of Australian youth (aged 12-25 years) reported on their stigmatising attitudes based on one of three disorders in vignettes: depression, depression with alcohol misuse, and social phobia. At a two-year follow-up interview, they were asked if they knew a family member or close friend with a problem similar to the vignette character since the initial interview, and those who did reported on the actions taken to help the person. Of the 1520 participants interviewed at follow up, 507 reported knowing someone with a similar problem. Young people's stigmatising attitudes (weak-not-sick, social distance and dangerousness/unpredictability) influenced their first aid actions. Social desirability could have affected the assessment of stigma, we could not assess the severity of the first aid recipient's problem or the benefit derived from the first aid provided, and the proportion of variance explained was modest. Reducing stigma may help to improve the first aid that people with mental health problems can receive from young people who are close to them. Copyright © 2011 Elsevier B.V. All rights reserved.

  13. Problems and Countermeasures for the Journal of Surveying and Mapping%测绘期刊面临的问题与对策研究

    Institute of Scientific and Technical Information of China (English)

    陈其宏

    2011-01-01

    当然随着社会生活的节奏继续加快,需求的多样性,市场竞争的加剧,国际合作的紧迫性,网络3G技术的普及,以及传统期刊管理的意识理念的不足,这些都给我国期刊事业的发展带来了新的挑战。测绘类的期刊也同样面临以上来自市场、技术、理念层面的诸多挑战。期刊永远是时代的记录者和践行者,改革已经毫无争议地成为期刊业高速发展的根本动力。测绘期刊业市场还有很多尚未开拓的领域,亟待去识别、去利用,调整策略,实现测绘期刊品牌化,国际化,服务个性化,盈利多样化,制度透明化,这些都是当前测绘期刊发展的机会。%As society continues to accelerate the pace of life,the diversity of needs,market competition,the urgency of international cooperation,the popularity of 3G technology network and awareness of the traditional concept of periodical management deficiencies,it has given a new challenges for the national development of journals.The journal of surveying and mapping is also facing many challenges from the market,technology and conceptual level.As a recorder of the times and practitioner, reform has become the fundamental driving force for the rapid development of journal.It also has many areas for the journal of surveying and mapping,and it need to distinguish,usage,adjustment strategy and to achieve the branding,internationalization, service personalization,earnings diversification as well as system transparent.And they are the opportunities for the development of surveying and mapping journal.

  14. Problem Solving

    Science.gov (United States)

    Kinsella, John J.

    1970-01-01

    Discussed are the nature of a mathematical problem, problem solving in the traditional and modern mathematics programs, problem solving and psychology, research related to problem solving, and teaching problem solving in algebra and geometry. (CT)

  15. A questionnaire survey on diseases and problems affecting sheep and goats in communal farming regions of the Eastern Cape province, South Africa.

    Science.gov (United States)

    Bath, Gareth F; Penrith, Mary-Louise; Leask, Rhoda

    2016-08-31

    A questionnaire of 15 questions was completed by four categories of respondents with the aim of establishing the experience and opinions of these groups on the constraints including animal health problems for communal, small-scale sheep and goat farming in the Eastern Cape province of South Africa. The questionnaires were completed independently and categories were representative of the areas investigated. Analysis of responses was done by means, ranges, votes and clusters of responses. Comparisons between the responses of the four categories were made to identify similarities or contrasts. The results revealed that of non-veterinary concerns, stock theft was the major problem for these farms. Nutrition was a further major constraint. A third area of significant concern was the provision or availability of facilities like fences, water troughs, dips and sheds. Lack of marketing and business skills were also seen as important deficiencies to be rectified so as to promote profitable farming. Of the most important veterinary problems identified, the provision, availability, cost and care of drugs and vaccines were seen as major stumbling blocks to effective disease control, as well as lack of access to veterinary services. The most important diseases that constrain small-ruminant livestock farming in the farming systems investigated were sheep scab and other ectoparasites, heart water, enterotoxaemia, internal parasites and bluetongue. A lack of knowledge in key areas of small-stock farming was revealed and should be rectified by an effective training and support programme to improve the contribution of small-ruminant farming to livelihoods in these communities.

  16. A questionnaire survey on diseases and problems affecting sheep and goats in communal farming regions of the Eastern Cape province, South Africa

    Directory of Open Access Journals (Sweden)

    Gareth F. Bath

    2016-02-01

    Full Text Available A questionnaire of 15 questions was completed by four categories of respondents with the aim of establishing the experience and opinions of these groups on the constraints including animal health problems for communal, small-scale sheep and goat farming in the Eastern Cape province of South Africa. The questionnaires were completed independently and categories were representative of the areas investigated. Analysis of responses was done by means, ranges, votes and clusters of responses. Comparisons between the responses of the four categories were made to identify similarities or contrasts. The results revealed that of non-veterinary concerns, stock theft was the major problem for these farms. Nutrition was a further major constraint. A third area of significant concern was the provision or availability of facilities like fences, water troughs, dips and sheds. Lack of marketing and business skills were also seen as important deficiencies to be rectified so as to promote profitable farming. Of the most important veterinary problems identified, the provision, availability, cost and care of drugs and vaccines were seen as major stumbling blocks to effective disease control, as well as lack of access to veterinary services. The most important diseases that constrain small-ruminant livestock farming in the farming systems investigated were sheep scab and other ectoparasites, heart water, enterotoxaemia, internal parasites and bluetongue. A lack of knowledge in key areas of small-stock farming was revealed and should be rectified by an effective training and support programme to improve the contribution of small-ruminant farming to livelihoods in these communities.

  17. 初中生数学问题解决中的元认知调查研究%A Survey Research about Meta-Cognition of Mathematics Problem Solving in Junior Middle School Students

    Institute of Scientific and Technical Information of China (English)

    宁兴全; 冯长焕; 王博蓉

    2015-01-01

    本文利用“数学问题解决中的元认知问卷量表”,对初中学生进行了抽样调查。然后对数据进行了数学问题解决中的元认知与数学成绩的相关性研究,对不同性别、不同成绩段以及不同年级学生的数学问题解决中的元认知进行了差异分析。结果表明,初中生数学问题解决中的元认知与数学成绩成显著正相关;初中生数学问题解决中的元认知在性别上差异不大,但在年级和优差生间差异较大。%Using a questionnaire about meta-cognition of mathematics problem solving , this study conducted a sample survey in junior middle school students .Analysis of the correlation between meta-cognition of mathematics problem solving and math scores , we also have analyzed the difference about meta-cognition of mathematics problem solving for different gender , math scores and grades .The following results are obtained: the meta-cognition of mathematics problem solving and math scores are of significant positive correlation on the part of junior middle school students;the meta-cognition of mathematics problem solving is little difference in gender , but there are sig-nificant differences in different grades and different math scores .

  18. Environmental Survey preliminary report

    Energy Technology Data Exchange (ETDEWEB)

    1988-04-01

    This report presents the preliminary findings from the first phase of the Environmental Survey of the United States Department of Energy (DOE) Sandia National Laboratories conducted August 17 through September 4, 1987. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with Sandia National Laboratories-Albuquerque (SNLA). The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations carried on at SNLA, and interviews with site personnel. 85 refs., 49 figs., 48 tabs.

  19. Food survey. Part A. U. S. agriculture in the U. S. balance of trade. Part B. The world food-population problem

    Energy Technology Data Exchange (ETDEWEB)

    Moulthrop, P.H.

    1976-01-01

    Part A of the paper examines U.S. agriculture with respect to its current and future role in that U.S. trade balance. Part B is a brief look at the world food-population problem. It is appropriate to examine alternatives. One alternative is to simply import oil and pay for it with agricultural exports, security being achieved through diversification of sources of imports. This study examines and identifies the major food issues. An attempt is made to demonstrate that U.S. agricultural exports will probably continue to be a strong positive element in the trade balance for at least the next decade. However, while worldwide demand for food will grow, so will the competition for U.S. agricultural exports. The uncertainties are of significant magnitude that to count on this strategy for the long term seems unwise.

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

    Directory of Open Access Journals (Sweden)

    Diana R. Cundell

    2009-12-01

    Full Text Available Educators are increasingly being encouraged to use more active- and problem-based-learning techniques and assignments in the classroom to improve critical and analytical thinking skills. Active learning-based courses have been purported to be more time consuming than traditional lecture methods and for many instructors have therefore proven difficult to include in many one-semester science courses. To address this problem, a series of assignments was developed for use in a basic microbiology course involving sophomore-, junior-, and senior-level students from five different biology majors (environmental science, biology, biochemistry, premedicine, and physician assistant. Writing assignments included global, historical, and social themes for which a standardized grading format was established. Students also participated in a class debate in which the merits of the living microbial kingdoms were discussed, with only one kingdom being saved from an imaginary global catastrophe. Traditional lectures were facilitated by the use of a dedicated note packet developed by the instructor and specific for course content. Laboratories involved group analysis of mini-case history studies involving pathogenic microbes. Students’ perceptions of the subject were assessed using an exit questionnaire sent to 100 of the 174 students who had taken the course during the 5-year time period. The majority of the 64 students who responded were sophomores (78%, in keeping with the target audience, and their perception of the course’s challenge level was significantly higher (p < 0.03, 8.7 than their junior and senior counterparts (7.9. Students rated the most useful learning tools as case history studies (9.4 and the class debate (9.1, with the introduction of a dedicated microbiology links web page to the University website representing the sole component resulting in a statistically significant increase in students’ perceptions of the importance of the course (p

  1. Web surveys' hidden hazards.

    Science.gov (United States)

    Morrel-Samuels, Palmer

    2003-07-01

    The same question posed on the Web and in print can yield very different answers, dramatically distorting survey results and misleading management. But, as psychologist Palmer Morrel-Samuels demonstrates, the problems are readily fixed.

  2. Herpes bovino tipo 1 (BHV 1: I. Sorologia de rebanhos com problemas reprodutivos Bovine herpesvirus type 1 (BHV-1: I. Sorologic survey in herds with reproductive problems

    Directory of Open Access Journals (Sweden)

    Telmo Vidor

    1995-01-01

    Full Text Available A presença de anticorpos neutralizantes contra o BHV-1, foi pesquisada pelo teste de soroneutralização (SN em 2.341 soros, dos quais 747 apresentaram resultado positivo, representando 31,9% de bovinos infectados pelo BHV-1. Os soros foram enviados de 112 propriedades da Região Sul, sendo na maioria rebanhos de gado de corte com problemas reprodutivos. Foram detectados bovinos sorologicamente positivos em 80 propriedades, representando 71,3%, demonstrando a expressiva disseminação do vírus nos rebanhos desta região.Serum antibodies against BHV-1 were studied, by the serum neutralization test, in cattle from Southem Brazil. Samples were collected from 2341 cattie from 112 farms that had reprodution problems. Positive results were obtained in 747 (31.9 cattie from 80 (71.31% farms, given evidence of the expressivo vírus dissemination in cattie from this region.

  3. What is Bobath? A survey of UK stroke physiotherapists' perceptions of the content of the Bobath concept to treat postural control and mobility problems after stroke.

    Science.gov (United States)

    Tyson, S F; Connell, L A; Busse, M E; Lennon, S

    2009-01-01

    The aim of this study was to identify which interventions used to treat postural control and mobility are considered part of the Bobath concept (BC). DESIGN. Hospital-based UK stroke physiotherapists identified interventions which they perceived to be part of the BC from a pre-published list of interventions used to treat postural control and mobility problems. Interventions that > 75% of participants felt were part of the BC were classified as 'definitely Bobath'. Interventions that Bobath'. Other interventions were classified as 'unsure'; those indentified by 50-74% of participants as part of the BC were classified as 'probably Bobath' and those indentified 26-49% were classified as 'probably not Bobath'. Seventy-four physiotherapists from 33 hospitals participated. Facilitation, mobilizations and practicing components of activities were most strongly associated with the BC. Exercise and the use of equipment were identified as 'not' or 'probably not Bobath'. There was uncertainty about practicing activities, teaching patients and carers and arranging independent practice. UK stroke physiotherapists perceive that the BC involves interventions that focus on facilitating movement, mobilization, practicing components of activities and some whole activities. Their views about what is not part of the BC and the areas where they are uncertain contrast with British and international teachers of the BC. Consequently, it was not possible to define a 'typical package' of treatment for postural control and mobility that represents the BC. Future research into the BC should focus on the effectiveness of specific, well-defined interventions.

  4. Self-reported neurological symptoms in relation to CO emissions due to problem gas appliance installations in London: a cross-sectional survey

    Directory of Open Access Journals (Sweden)

    Kreis Irene

    2008-07-01

    Full Text Available Abstract Background Previous research by the authors found evidence that up to 10% of particular household categories may be exposed to elevated carbon monoxide (CO concentrations from poor quality gas appliance installations. The literature suggests certain neurological symptoms are linked to exposure to low levels of CO. This paper addresses the hypothesis that certain self-reported neurological symptoms experienced by a householder are linked to an estimate of their CO exposure. Methods Between 27 April and 27 June 2006, 597 homes with a mains supply of natural gas were surveyed, mainly in old, urban areas of London. Qualified gas engineers tested all gas appliances (cooker, boiler, gas fire, and water heater and reported, according to the Gas Industry Unsafe Situations Procedure, appliances considered At Risk (AR, Immediately Dangerous (ID or Not to Current Standards (NCS. Five exposure risk categories were defined based on measurement of CO emitted by the appliance, its features and its use, with "high or very high" exposure category where occupants were considered likely to be exposed to levels greater than 26 ppm for one hour. The prevalence of symptoms at each level of exposure was compared with that at lowest level of exposure. Results Of the households, 6% were assessed as having a "high or very high" risk of exposure to CO. Of the individuals, 9% reported at least one neurological symptom. There was a statistically significant association between "high or very high" exposure risk to CO and self-reported symptoms compared to "no exposure" likelihood, for households not in receipt of benefit, controlling for "number of residents" and presence of pensioners, OR = 3.23 (95%CI: 1.28, 8.15. Risk ratios across all categories of exposure likelihood indicate a dose-response pattern. Those households in receipt of benefit showed no dose-response pattern. Conclusion This study found an association between risk of CO exposure at low concentration

  5. 流动人口被害问题的调查与分析%A Survey and Analysis on Victimized Problem of Floating Population

    Institute of Scientific and Technical Information of China (English)

    张应立

    2012-01-01

    据浙江省统计,流动人口中的犯案人员虽然仅占0.06%,但却左右着社会治安形势,他们既是主要刑事作案人员,又是主要被害人群。流动人口被害呈现如下特点:“三车”(电瓶车、自行车、摩托车)被盗多,现金被盗多,在暂住地被害多,初中以下文化的中青年男性工人被害多,被害人过错明显。减少流动人口被害需多策并举,加强流动人口聚居区域巡控防卫,提高流动人口自我防范能力,改善流动人口居住条件等。%According to statistics of Zhcjiang province, although criminal offenders only account for 0.06% in floating population, they still affect social order. They are not only criminal offenders, but also usually fall victims to crimes, which presents the following features : their battery bike, bike and motorbike are often stolen ; their cash is also stolen; they are often victimized in temporary residing places; young and middle -aged male workers with level of education below junior middle school often fall victims to crimes ; victim' s fault is obvious. For the purpose of reducing victimized problem of floating population, various measures need to be adpoted simultaneously, namely, patrolling, controlling and prevention work should be strengthened in the regions where floating population lives, their self- protection ability and living conditions should be improved, etc.

  6. Discussion on the Existing Problems and Solving Suggestion of Market Survey Theory%小议市场调查理论存在的问题及解决建议

    Institute of Scientific and Technical Information of China (English)

    赵润慧

    2011-01-01

    As an important component of modern enterprise management, market research plays more and more important role in the enterprise product development, price positioning, entrepreneurs are increasingly dependent on reliable and comprehensive market survey and market forecast for business strategic decisions. The purpose of market research and forecasting is to guarantee the accuracy and timeliness of business decision. This article analyzes development status, characteristics and problems of the market research industry, and explores the strategies for the healthy development of survey industry in China.%市场调查作为现代企业管理的重要组成.越来越对企业的产品开发,价格定位等发挥重要作用,企业家们也越来越倚重于周详的市场调查与可靠的市场预测,对企业的经营进行战略决策.市场调查与预测的目的,就是为了保障经营决策的正确性和及时性.本文分析了我国市场调查业的发展现状、特点及存在问题,并探讨了我国调查业健康发展的对策.

  7. 3D seismic survey in Honjo, Akita. Problems and struggles in acquisition and processing; Akitaken Honjo koku ni okeru sanjigen jishin tansa. Genba sagyo to data shori ni okeru mondaiten

    Energy Technology Data Exchange (ETDEWEB)

    Imahori, S.; Kotera, Y.; Nakanishi, T. [Japan Energy Development Co. Ltd., Tokyo (Japan)

    1997-05-27

    Honjo mining area where investigations are conducted is hilly and has a complicated terrain with gas pipes buried in the ground just under the access road disabling the proper positioning of shock-generating large excavators or vibrators. Auger`s shallow hole shooting method is used in this survey to execute blastings at 639 points. In this method using charge depths of 4m, different from the conventional method using deeper charge depths (20-25m), surface waves prevail in the shot records giving rise to a new problem of removing them in the stage of data processing. The 2D filter that is a powerful tool in 2D data processing is not available in a 3D-survey where the tracing intervals are irregular in the shot records. In the effort of this time, a window length as a parameter in the direction of time is specified, and the F-X dip filtering method is employed in which any event that linearly continues beyond a certain number of traces in the said window is eliminated as a linear noise. It is recommended that the weighting function be changed in the direction of space since surface wave velocities are different at different locations. 1 fig., 1 tab.

  8. 2007版地调项目预算标准存在的问题及建议%The Problems that We Face in Budget Standard for the Projects of Geological Survey 2007 and Some Suggestions

    Institute of Scientific and Technical Information of China (English)

    孔令; 储潇姝; 彭国良; 张津伟; 张元; 胡晓丽; 刘京

    2015-01-01

    2007地调项目预算标准的主要问题有:不含生产设备折旧费、职工福利费、利税等;地形测绘、地质测量、遥感地质、物化探、钻探、岩矿试验、其他地质工作、工地建筑部分个别项目在标准执行过程中与市场经济体制下的市场价格出现了较大的偏差;地质勘查新手段新工艺因无可选取的合理指导价,出现了推广创新难的问题,一定程度上阻碍了地质勘查技术水平的发展。建议:(1)继续开展现行预算标准《国土资源调查预算标准(地质调查部分)》的跟踪评估工作,并对存在的问题和完善性建议进一步论证,及时颁行新的预算标准或补充规定。(2)建立健全预算标准动态调整机制,加强地质调查项目预算动态管理。%This paper ifrst analyzes the main problems regarding budget standard for the projects of geological survey of 2007. These are as follows: depreciation, employee services and beneifts, and proifts and taxes were not included; in the implementation of the standard, a few projects which involved topographic surveying, geological survey, remote sensing geology, geophysical geochemical exploration, drilling exploration, rock ore test, other geological work, and field construction deviated from the market prices for the market economy. There were some dififcult problems in promoting and innovating new means and new process of geological exploration due to the reasonable guided-price, which hindered the development of geological prospecting technology level to some extent. In light of this, this paper points out that we should devote our efforts and work to continually carry out follow-up assessments about the current budget standard, further expound and prove some improving suggestions for existing problems, and enact new budget standard or supplementary provisions in a timely manner. At the same time, a sound budget standard dynamic adjustment mechanism should be put

  9. Balance Problems

    Science.gov (United States)

    ... you are having balance problems, see your doctor. Balance disorders can be signs of other health problems, such ... cases, treating the illness that is causing the disorder will help with the balance problem. Exercises, a change in diet, and some ...

  10. Hemiequilibrium problems

    Directory of Open Access Journals (Sweden)

    Muhammad Aslam Noor

    2004-01-01

    Full Text Available We consider a new class of equilibrium problems, known as hemiequilibrium problems. Using the auxiliary principle technique, we suggest and analyze a class of iterative algorithms for solving hemiequilibrium problems, the convergence of which requires either pseudomonotonicity or partially relaxed strong monotonicity. As a special case, we obtain a new method for hemivariational inequalities. Since hemiequilibrium problems include hemivariational inequalities and equilibrium problems as special cases, the results proved in this paper still hold for these problems.

  11. 东莞市“富二代”青少年问题行为调查%Survey of"second rich generation"adolescent problem behaviors of Dongguan city

    Institute of Scientific and Technical Information of China (English)

    曾家勇; 许志平

    2013-01-01

      The impact of adolescent problem behaviors receives the social concern in recent years. The purpose of this study is to explore the basic situation and influence factors of adolescent problem behavior in Dongguan city,, select the"noble"high school of junior and senior middle school students of 316 adolescents of 11-15 years old in Dongguan City (including"two rich generation"in 222 adolescents) as subjects, using the"adolescent behavior questionnaire","evaluation of Parents Parenting Style Scale"and self-designed questionnaire survey, results show that:(1) the difference of the total level of Dongguan city"second rich generation"adolescent problem behavior and ordinary adolescent problem behaviors is not significant. (2) difference of different gender, different grades of"second rich generation"youth in the overall level of problem behavior is significant. (3)"second rich generation"adolescent problem behaviors in the overall level of parenting style and strong correlation, stepwise regression analysis show that, father's emotional warmth and understanding, excessive interference and protection of mother, mother refusing to behavior problems have strong predictive power.%  “富二代”青少年问题行为带来的影响近年来备受社会关注。本研究旨在探究东莞市“富二代”青少年问题行为的基本情况及影响因素,选取了东莞市11-15岁“贵族中学”初高中生共316名青少年(其中“富二代”青少年222名)作被试,采用《青少年行为问卷》,《父母教养方式评价量表》及自制基本情况调查问卷施测,结果表明:(1)东莞市“富二代”青少年问题行为总体水平与普通青少年问题行为总体水平差异不显著。(2)不同性别、不同学业成绩的“富二代”青少年在问题行为总体水平上差异显著。(3)“富二代”青少年问题行为总体水平与父母亲教养方式有较强相关,采用逐步回归分析表明,父亲

  12. Terminological confusions and problems at the interface between the crystal field Hamiltonians and the zero-field splitting Hamiltonians—Survey of the CF=ZFS confusion in recent literature

    Energy Technology Data Exchange (ETDEWEB)

    Rudowicz, Czesław, E-mail: crudowicz@zut.edu.pl [Institute of Physics, West Pomeranian University of Technology, Al. Piastów 17, 70-310 Szczecin (Poland); Karbowiak, Mirosław [Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław (Poland)

    2014-10-15

    The single transition ions in various crystals or molecules as well as the exchange coupled systems (ECS) of transition ions, especially the single molecule magnets (SMM) or molecular nanomagnets (MNM), have been extensively studied in recent decades using electron magnetic resonance (EMR), optical spectroscopy, and magnetic measurements. Interpretation of magnetic and spectroscopic properties of transition ions is based on two physically distinct types of Hamiltonians: the physical crystal field (CF), or equivalently ligand field (LF), Hamiltonians and the effective spin Hamiltonians (SH), which include the zero-field splitting (ZFS) Hamiltonians. Survey of recent literature has revealed a number of terminological confusions and specific problems occurring at the interface between these Hamiltonians (denoted CF (LF)↔SH (ZFS)). Elucidation of sloppy or incorrect usage of crucial notions, especially those describing or parameterizing crystal fields and zero field splittings, is a very challenging task that requires several reviews. Here we focus on the prevailing confusion between the CF (LF) and SH (ZFS) quantities, denoted as the CF=ZFS confusion, which consists in referring to the parameters (or Hamiltonians), which are the true ZFS (or SH) quantities, as purportedly the CF (LF) quantities. The inverse ZFS=CF confusion, which pertains to the cases of labeling the true CF (LF) quantities as purportedly the ZFS quantities, is considered in a follow-up paper. The two reviews prepare grounds for a systematization of nomenclature aimed at bringing order to the zoo of different Hamiltonians. Specific cases of the CF=ZFS confusion identified in the recent textbooks, review articles, and SMM (MNM)- and EMR-related papers are surveyed and the pertinent misconceptions are outlined. The consequences of the terminological confusions go far beyond simple semantic issues or misleading keyword classifications of papers in journals and scientific databases. Serious

  13. 南宁市301例儿童饮食行为调查分析%Prevalence of eating problems among 1~3 years old children: A local survey in Nanning.

    Institute of Scientific and Technical Information of China (English)

    吴葆宁; 班彩霞; 梁燕婷; 朱才荣

    2012-01-01

    [目的]了解南宁市社区1~3岁儿童饮食行为问题及家庭喂养状况,为进一步开展早期干预提供科学依据.[方法]随机抽取南宁市两个社区1岁至不满4岁健康儿童301名作为调查对象,采用自填问卷的调查方法,内容包括儿童一般资料,儿童饮食行为问题,抚养人的喂养行为问题.[结果]65.1%的儿童存在有饮食行为问题,饮食行为问题发生率由高到低顺位依次为进餐时间过长46.5%、进餐分心37.9%、吃得少35.9%、进餐地点不固定34.2%,对食物不感兴趣23.6%、强烈偏爱某种食物20.6%、拒绝某种食物19.3%、不愿尝试新食物11.0%.[结论]南宁市社区1~3岁儿童饮食行为问题发生率较多见,加强营养与喂养知识的健康教育,针对个性化指导和行为干预,使儿童形成良好的饮食行为习惯.%[Objective] To investigate prevalence of eating problems among cnildren of 1 - 3 years old in Nanning and provide scientific evidence for the early intervention. [Methods] 301 healthy children aged 1 - 3 from two communities in Nanning were selected randomly and surveyed. Cross-sectional survey was conducted . Date included children, Social demographic information,eating behavior and their caregiver' sinformation. [Result] 67. 1 % of children identified as eating problem,the incidence of dietary behavior problems from high to low were long mealtime 46. 5% ,dining distraction 37. 9% , eat less 35. 9%, fixed eating place 34. 2%, 23. 6% had lost interest in food, 20. 6% preferred some kinds food itensely, 19.3% Refuse some food, 11.0% try nothing new. [Conclusion] The children of 1-3 years old from two communities in Nanning have a high rate of eating problem, we are calling for improvements in feeding and nutrition knowledge, behavioural interventions personalized guidance to develop healthy eating habits.

  14. Problem inquiry didactics and its application in teaching of Surveying%问题研讨式教学法在测量学教学中的应用

    Institute of Scientific and Technical Information of China (English)

    郭宗河; 于广明; 郑进风

    2013-01-01

    This paper summarized the present situation of the higher education and classroom instruction, and pointed out that the higher education has stepped in popular times. In the wake of expansion of student scale, the ratio of teachers and students is serious disproportion, then the instruction effect is lower. For that reason, a method of Problem Inquiry Didactics was introduced in the teaching of Surveying, and it achieved good results.%本文分析总结了当前我国高等教育和班级课堂教学的现状,指出我国的高等教育已经步入了大众化时代,随着学生规模的扩大,师生比严重失调,不得不采用多个班大合堂授课的形式,传统“满堂灌”的教学方法效果较差.为此,将“问题研讨式教学法”这一先进的教学模式适时、适量地引入到测量学教学中,在培养学生的创新精神和自学能力方面收到了良好的效果.

  15. Location-routing problems

    Energy Technology Data Exchange (ETDEWEB)

    Laporte, G.

    1987-01-01

    Location-routing problems involve simultaneously locating a number of facilities among candidate sites and establishing delivery routes to a set of users in such a way that the total system cost is minimized. This paper presents a survey of such problems. It includes some applications and examples of location-routing problems, a description of the main heuristics that have been developed for such problems, and reviews of various formulations and algorithms used in solving these problems. A more detailed review is given of exact algorithms for the vehicle routing problem, three-index vehicle flow formulations, and two-index vehicle flow formulations and algorithms for symmetrical and non-symmetrical problems. It is concluded that location-routing problem research is a fast-growing area, with most developments occurring over the past few years; however, research is relatively fragmented, often addresses problems which are too specific and contains several voids which have yet to be filled. A number of promising research areas are identified. 137 refs., 3 figs.

  16. Learning Problems

    Science.gov (United States)

    ... de los dientes Video: Getting an X-ray Learning Problems KidsHealth > For Kids > Learning Problems Print A ... for how to make it better. What Are Learning Disabilities? Learning disabilities aren't contagious, but they ...

  17. Walking Problems

    Science.gov (United States)

    ... your legs or feet Movement disorders such as Parkinson's disease Diseases such as arthritis or multiple sclerosis Vision or balance problems Treatment of walking problems depends on the cause. Physical therapy, surgery, or mobility aids may help.

  18. The APU and the 1978 Mathematics Survey

    Science.gov (United States)

    Bell, Alan

    1977-01-01

    A tentative structure for a survey concerned with assessing the whole range of outcomes of school mathematics education is outlined. The structure provides for surveying content categories, process categories, and attitudes, utilizing practical manipulative problems. (MN)

  19. Sociale problemer

    DEFF Research Database (Denmark)

    Christensen, Anders Bøggild; Rasmussen, Tove; Bundesen, Peter Verner

    Sociale problemer kan betragtes som selve udgangspunktet for socialt arbejde, hvor ambitionen er at råde bod på problemerne og sikre, at udsatte borgere får en bedre tilværelse. Det betyder også, at diskussionen af sociale problemer er afgørende for den sociale grundfaglighed. I denne bog sætter en...... række fagfolk på tværs af det danske socialfaglige felt fokus på sociale problemer. Det diskuteres, hvad vi overhovedet forstår ved sociale problemer, hvordan de opstår, hvilke konsekvenser de har, og ikke mindst hvordan man som fagprofessionel håndterer sociale problemer i det daglige arbejde. Bogen er...... skrevet som lærebog til professionsuddannelser, hvor sociale problemer udgør en dimension, bl.a. socialrådgiver-, pædagog- og sygeplejerskeuddannelserne....

  20. Problems of energy supply. Probleme der Energieversorgung

    Energy Technology Data Exchange (ETDEWEB)

    Frank, W.

    1983-01-01

    Political education is to enable judgement of present-day questions. This requires knowledge of the essential facts in the field of energy supply. The brochure on hand is meant to make it easier for the reader to put forward his own arguments. The reader is to see that it is due to the many motives determining energy policy which aggravate an understanding about ways of solving problems of energy supply. This brochure is designed to enhance political education by giving a survey of tasks in energy policy to be solved on an international level and in Austria.

  1. LAMB PROBLEM

    Directory of Open Access Journals (Sweden)

    Terent'eva Elena Olegovna

    2013-09-01

    Full Text Available Inner and outer Lamb problems are of extreme importance for various applications in geophysics, as these problems are often used for simulation of wave fields accompanying earthquakes. Solutions of the outer Lamb problem of concentrated force impact applied to the free surface of an elastic half-plane are analyzed in this article. Two solutions are compared: the analytical solution obtained in 1984 and the solution obtained in a modern FEM complex Abaqus.

  2. LAMB PROBLEM

    OpenAIRE

    Terent'eva Elena Olegovna

    2013-01-01

    Inner and outer Lamb problems are of extreme importance for various applications in geophysics, as these problems are often used for simulation of wave fields accompanying earthquakes. Solutions of the outer Lamb problem of concentrated force impact applied to the free surface of an elastic half-plane are analyzed in this article. Two solutions are compared: the analytical solution obtained in 1984 and the solution obtained in a modern FEM complex Abaqus.

  3. Knee Problems

    Science.gov (United States)

    ... BMI Calculator myhealthfinder Immunization Schedules Nutrient Shortfall Questionnaire Knee ProblemsPain, swelling, stiffness and "water" on the knee are common symptoms. Follow this chart for more ...

  4. "Suntelligence" Survey

    Science.gov (United States)

    ... to the American Academy of Dermatology's "Suntelligence" sun-smart survey. Please answer the following questions to measure ... be able to view a ranking of major cities suntelligence based on residents' responses to this survey. ...

  5. Survey Says

    Science.gov (United States)

    McCarthy, Susan K.

    2005-01-01

    Survey Says is a lesson plan designed to teach college students how to access Internet resources for valid data related to the sexual health of young people. Discussion questions based on the most recent available data from two national surveys, the Youth Risk Behavior Surveillance-United States, 2003 (CDC, 2004) and the National Survey of…

  6. ASHA Survey of Health Curriculum Needs: Survey Results.

    Science.gov (United States)

    Schneider, Livingston S.; Thier, Herbert D.

    The results of a survey conducted by the Ad hoc Committee to Study the Needs and Problems of the Classroom Teacher in Curriculum Development are reported. Questionnaires were sent to members of the American School Health Association (ASHA). The survey was composed of four sections: (1) background information on demographic data, institutional…

  7. Popular Problems

    Science.gov (United States)

    Skovhus, Randi Boelskifte; Thomsen, Rie

    2017-01-01

    This article introduces a method to critical reviews and explores the ways in which problems have been formulated in knowledge production on career guidance in Denmark over a 10-year period from 2004 to 2014. The method draws upon the work of Bacchi focussing on the "What's the problem represented to be" (WPR) approach. Forty-nine…

  8. Popular Problems

    Science.gov (United States)

    Skovhus, Randi Boelskifte; Thomsen, Rie

    2017-01-01

    This article introduces a method to critical reviews and explores the ways in which problems have been formulated in knowledge production on career guidance in Denmark over a 10-year period from 2004 to 2014. The method draws upon the work of Bacchi focussing on the "What's the problem represented to be" (WPR) approach. Forty-nine…

  9. Prostate Problems

    Science.gov (United States)

    ... do to help diagnose your prostate problem. Physical Exam A physical exam may help diagnose the cause ... sleep avoid or drink fewer liquids that have caffeine or alcohol in them avoid medicines that may ...

  10. Popular Problems

    DEFF Research Database (Denmark)

    Skovhus, Randi Boelskifte; Thomsen, Rie

    2016-01-01

    This article introduces a method to critical reviews and explores the ways in which problems have been formulated in knowledge production on career guidance in Denmark over a 10-year period from 2004 to 2014. The method draws upon the work of Bacchi focussing on the ‘What's the problem represented...... to be’ (WPR) approach. Forty-nine empirical studies on Danish youth career guidance were included in the study. An analysis of the issues in focus resulted in nine problem categories. One of these, ‘targeting’, is analysed using the WPR approach. Finally, the article concludes that the WPR approach...... provides a constructive basis for a critical analysis and discussion of the collective empirical knowledge production on career guidance, stimulating awareness of problems and potential solutions among the career guidance community....

  11. Kidney Problems

    Science.gov (United States)

    ... our e-newsletter! Aging & Health A to Z Kidney Problems Basic Facts & Information The kidneys are two ... the production of red blood cells. What are Kidney Diseases? For about one-third of older people, ...

  12. Tongue problems

    Science.gov (United States)

    ... Tongue pain may also occur with: Diabetic neuropathy Leukoplakia Mouth ulcers Oral cancer After menopause, some women ... problem. Medicine may be prescribed for mouth ulcers, leukoplakia, oral cancer, and other mouth sores. Anti-inflammatory ...

  13. Erection problems

    Science.gov (United States)

    ... monitoring to test how strong your erection is Psychological tests to check for depression and other emotional problems ... the principles of the Health on the Net Foundation (www.hon.ch). The information provided herein should ...

  14. Breathing Problems

    Science.gov (United States)

    ... getting enough air. Sometimes you can have mild breathing problems because of a stuffy nose or intense ... panic attacks Allergies If you often have trouble breathing, it is important to find out the cause.

  15. Sleep Problems

    Science.gov (United States)

    ... For Consumers Consumer Information by Audience For Women Sleep Problems Share Tweet Linkedin Pin it More sharing ... PDF 474KB) En Español Medicines to Help You Sleep Tips for Better Sleep Basic Facts about Sleep ...

  16. Eyelid Problems

    Science.gov (United States)

    ... Ear Nose & Throat Emotional Problems Eyes Fever From Insects or Animals Genitals and Urinary Tract Glands & Growth ... an irregular shape (astigmatism), it will threaten normal vision development and must be corrected as early as ...

  17. Knapsack problems

    CERN Document Server

    Kellerer, Hans; Pisinger, David

    2004-01-01

    Thirteen years have passed since the seminal book on knapsack problems by Martello and Toth appeared. On this occasion a former colleague exclaimed back in 1990: "How can you write 250 pages on the knapsack problem?" Indeed, the definition of the knapsack problem is easily understood even by a non-expert who will not suspect the presence of challenging research topics in this area at the first glance. However, in the last decade a large number of research publications contributed new results for the knapsack problem in all areas of interest such as exact algorithms, heuristics and approximation schemes. Moreover, the extension of the knapsack problem to higher dimensions both in the number of constraints and in the num­ ber of knapsacks, as well as the modification of the problem structure concerning the available item set and the objective function, leads to a number of interesting variations of practical relevance which were the subject of intensive research during the last few years. Hence, two years ago ...

  18. Calculus problems

    CERN Document Server

    Baronti, Marco; van der Putten, Robertus; Venturi, Irene

    2016-01-01

    This book, intended as a practical working guide for students in Engineering, Mathematics, Physics, or any other field where rigorous calculus is needed, includes 450 exercises. Each chapter starts with a summary of the main definitions and results, which is followed by a selection of solved exercises accompanied by brief, illustrative comments. A selection of problems with indicated solutions rounds out each chapter. A final chapter explores problems that are not designed with a single issue in mind but instead call for the combination of a variety of techniques, rounding out the book’s coverage. Though the book’s primary focus is on functions of one real variable, basic ordinary differential equations (separation of variables, linear first order and constant coefficients ODEs) are also discussed. The material is taken from actual written tests that have been delivered at the Engineering School of the University of Genoa. Literally thousands of students have worked on these problems, ensuring their real-...

  19. Engineering surveying

    CERN Document Server

    Schofield, W

    2001-01-01

    The aim of Engineering Surveying has always been to impart and develop a clear understanding of the basic topics of the subject. The author has fully revised the book to make it the most up-to-date and relevant textbook available on the subject.The book also contains the latest information on trigonometric levelling, total stations and one-person measuring systems. A new chapter on satellites ensures a firm grasp of this vitally important topic.The text covers engineering surveying modules for civil engineering students on degree courses and forms a reference for the engineering surveying module in land surveying courses. It will also prove to be a valuable reference for practitioners.* Simple clear introduction to surveying for engineers* Explains key techniques and methods* Details reading systems and satellite position fixing

  20. Ear Problems

    Science.gov (United States)

    ... have cold or flu symptoms?YesNoDo you have tooth pain on the same side as the ear pain ... or 2 days, see your doctor.Start OverDiagnosisA tooth problem can radiate pain to the ear on the same side.Self ...

  1. Youth Survey

    DEFF Research Database (Denmark)

    Balvig, Flemming

    The number of juvenile dilenquints has declined in Denmark. Juvenile delinquincy is a problem first and foremost because it is often a symptom of other current and serious problems for young people in their everyday lives, and because it often concerns acts that may lead to problems for them later...

  2. Youth Survey

    DEFF Research Database (Denmark)

    Balvig, Flemming

    The number of juvenile dilenquints has declined in Denmark. Juvenile delinquincy is a problem first and foremost because it is often a symptom of other current and serious problems for young people in their everyday lives, and because it often concerns acts that may lead to problems for them late...

  3. Eigenvalue Problems.

    Science.gov (United States)

    1987-06-01

    and f. Let us consider the problem of finding the minimal constant C. We are thus interested in 2~ IVA u dx (1.24) C = sup . u2u (0 (F =0 (u dx"<u(O...fournir des bornes superieures ou inferieures, C.R. Acad. Sci., Paris 235, 995-997. .V Prodi, G. (1962]: Theoremi di tipo locale per il sistema de Navier

  4. Optimization Problems

    Directory of Open Access Journals (Sweden)

    Yaping Hu

    2015-01-01

    the nonsmooth convex optimization problem. First, by using Moreau-Yosida regularization, we convert the original objective function to a continuously differentiable function; then we use approximate function and gradient values of the Moreau-Yosida regularization to substitute the corresponding exact values in the algorithm. The global convergence is proved under suitable assumptions. Numerical experiments are presented to show the effectiveness of this algorithm.

  5. A survey and evaluation of microbased computer aided design systems for design education and practice in Scotland primarily in the area of product design: their application, problems and potential solutions

    OpenAIRE

    Carter, Roderick P.

    1992-01-01

    The initial premise of the research centred around the relatively new adoption by the Product Design sector of Computer Aided Design technology. Problems Were expected to occur in applying the hardware and understanding the terminology of the software by this sector which prides itself In its artisan skills. The aim of the work was to determine the extent of the adoption of Computer Aided Design and to clarify the problem areas. The research determined, by study of more experienced but sim...

  6. HandiVIH—A population-based survey to understand the vulnerability of people with disabilities to HIV and other sexual and reproductive health problems in Cameroon: protocol and methodological considerations

    Science.gov (United States)

    De Beaudrap, Pierre; Pasquier, Estelle; Tchoumkeu, Alice; Touko, Adonis; Essomba, Frida; Brus, Aude; Desgrées du Loû, Annabel; Aderemi, Toyin Janet; Hanass-Hancock, Jill; Eide, Arne Henning; Mont, Daniel; Mac-Seing, Muriel; Beninguisse, Gervais

    2016-01-01

    Introduction In resource-limited countries, people with disabilities seem to be particularly vulnerable to HIV infection due to barriers to accessing information and services, frequent exposure to sexual violence and social exclusion. However, they have often been left behind in the HIV response, probably because of the lack of reliable epidemiological data measuring this vulnerability. Multiple challenges in conducting good quality epidemiological surveys on people with disabilities require innovative methods to better understand the link between disability and HIV. This paper describes how the design and methods of the HandiVIH study were adapted to document the vulnerability of people with disabilities to HIV, and to compare their situation with that of people without disabilities. Methods and analysis The HandiVIH project aims to combine quantitative and qualitative data. The quantitative component is a cross-sectional survey with a control group conducted in Yaoundé (Cameroon). A two-phase random sampling is used (1) to screen people with disabilities from the general population using the Washington Group questionnaire and, (2) to create a matched control group. An HIV test is proposed to each study participant. Additionally, a questionnaire including a life-event interview is used to collect data on respondents’ life-course history of social isolation, employment, sexual partnership, HIV risk factors and fertility. Before the cross-sectional survey, a qualitative exploratory study was implemented to identify challenges in conducting the survey and possible solutions. Information on people with disabilities begging in the streets and members of disabled people's organisations is collected separately. Ethics and dissemination This study has been approved by the two ethical committees. Special attention has been paid on how to adapt the consenting process to persons with intellectual disabilities. The methodological considerations discussed in this paper may

  7. Survey Data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Cleaned and QCd data for the Fishing Effort Survey. Questions on fishing and other out are asked on weather and outdoor activity, including fishing trips. Used for...

  8. Frames and extension problems I

    DEFF Research Database (Denmark)

    Christensen, Ole

    2014-01-01

    In this article we present a short survey of frame theory in Hilbert spaces. We discuss Gabor frames and wavelet frames and set the stage for a discussion of various extension principles; this will be presented in the article Frames and extension problems II (joint with H.O. Kim and R.Y. Kim)....

  9. Internet use and electronic gaming by children and adolescents with emotional and behavioural problems in Australia – results from the second Child and Adolescent Survey of Mental Health and Wellbeing

    OpenAIRE

    Rikkers, Wavne; Lawrence, David; Hafekost, Jennifer; Stephen R Zubrick

    2016-01-01

    Background Concerns have been raised of a potential connection between excessive online activity outside the academic realm and increased levels of psychological distress in young people. Young Minds Matter: the second Australian Child and Adolescent Survey of Mental Health and Wellbeing provides estimates of the prevalence of online activity and allows an exploration of associations between this activity, a range of mental disorders, socio-demographic characteristics and risk taking behaviou...

  10. Discussion of Working Procedures and Other Attentive Problems of Survey for Assigned Land%拨地测量的工作程序及测绘依据的探讨

    Institute of Scientific and Technical Information of China (English)

    李红利; 张立军

    2012-01-01

    拨地测量作为城市规划测量的重要组成部分,有着极其重要的作用。笔者主要说明的有三部分内容,一是如何正确解读上级规划行政主管部门核发的建筑用地钉桩通知单(三联单)及附图,完成前期资料收集、整理工作;二是拨地测量外业相关工作程序、作业方法、作业依据的概述;三是拨地测量后期的成果整理、拨地展图的要求以及归档等需要注意的相关问题。%Survey for assigned lands is an important part of city planning survey. It plays an important role in city plan ning. This paper can be divided into three parts: first, how to understand the notices, to finish collecting the data re sources. Second, it introduces the program, method, bases of field surveying. Third, how to deal with the production da ta,how to meet the need of the final map, and archive the production.

  11. [Wyandotte National Wildlife Refuge : Resource Problems

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — During a December 1981 Threats and Conflicts survey, twenty-five resource problems were identified for Wyandotte National Wildlife Refuge. This plan summarizes...

  12. Shiawassee National Wildlife Refuge : Resource Problems

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — During a December 1981 threats and conflicts survey, twenty-nine resource problems were identified for Shiawassee National Wildlife Refuge. This plan summarizes...

  13. Complementarity Problems

    Directory of Open Access Journals (Sweden)

    Xin-He Miao

    2012-01-01

    Full Text Available This paper investigates the Lipschitz continuity of the solution mapping of symmetric cone (linear or nonlinear complementarity problems (SCLCP or SCCP, resp. over Euclidean Jordan algebras. We show that if the transformation has uniform Cartesian P-property, then the solution mapping of the SCCP is Lipschitz continuous. Moreover, we establish that the monotonicity of mapping and the Lipschitz continuity of solutions of the SCLCP imply ultra P-property, which is a concept recently developed for linear transformations on Euclidean Jordan algebra. For a Lyapunov transformation, we prove that the strong monotonicity property, the ultra P-property, the Cartesian P-property, and the Lipschitz continuity of the solutions are all equivalent to each other.

  14. Problem Representation and Academic Performance in Statistics

    Science.gov (United States)

    Li, Jun

    2014-01-01

    The purpose of this study was to examine the relationship between problem representation and academic performance in statistics. A specially-designed triad judgment task was administered through SurveyMonkey, an online survey service. Participants were 162 high school graduates who took the AP Statistics Examination in the spring of 2013. Results…

  15. Problems and Concerns Among Medical Students--1975

    Science.gov (United States)

    Edwards, Marc T.; Zimet, Carl N.

    1976-01-01

    Students at the University of Colorado School of Medicine were surveyed using an inventory of problems and concerns relating to their personal and academic lives. The survey revealed that among chief student concerns are a lack of personal freedom, excessive academic pressures, and feelings of dehumanization. (Editor/LBH)

  16. Engineering surveying

    CERN Document Server

    Schofield, W

    2007-01-01

    Engineering surveying involves determining the position of natural and man-made features on or beneath the Earth's surface and utilizing these features in the planning, design and construction of works. It is a critical part of any engineering project. Without an accurate understanding of the size, shape and nature of the site the project risks expensive and time-consuming errors or even catastrophic failure.Engineering Surveying 6th edition covers all the basic principles and practice of this complex subject and the authors bring expertise and clarity. Previous editions of this classic text have given readers a clear understanding of fundamentals such as vertical control, distance, angles and position right through to the most modern technologies, and this fully updated edition continues that tradition.This sixth edition includes:* An introduction to geodesy to facilitate greater understanding of satellite systems* A fully updated chapter on GPS, GLONASS and GALILEO for satellite positioning in surveying* Al...

  17. Parental Problem Drinking and Adolescent Psychological Problems: The Moderating Effect of Adolescent-Parent Communication

    Science.gov (United States)

    Ohannessian, Christine McCauley

    2013-01-01

    The primary aim of this study was to examine whether adolescent-parent communication moderates the relationship between parental problem drinking and adolescent psychological problems. Surveys were administered to a community sample of 1,001 adolescents in the spring of 2007. Results indicate that paternal problem drinking was associated with…

  18. The Hidden Subgroup Problem

    CERN Document Server

    Wang, Frédéric

    2010-01-01

    We give an overview of the Hidden Subgroup Problem (HSP) as of July 2010, including new results discovered since the survey of arXiv:quant-ph/0411037v1. We recall how the problem provides a framework for efficient quantum algorithms and present the standard methods based on coset sampling. We study the Dihedral and Symmetric HSPs and how they relate to hard problems on lattices and graphs. Finally, we conclude with the known solutions and techniques, describe connections with efficient algorithms as well as miscellaneous variants of HSP. We also bring various contributions to the topic. We show that in theory, we can solve HSP over a given group inductively: the base case is solving HSP over its simple factor groups and the inductive step is building efficient oracles over a normal subgroup N and over the factor group G/N. We apply this analysis to the Dedekindian HSP to get an alternative abelian HSP algorithm based on a change of the underlying group. We also propose a quotient reduction by the normal group...

  19. Happiness Survey

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Are Chinese people happy in today’s fast-paced, modern society? What are the sources of their happiness? In today’s rapidly developing economy, is happiness closely related to wealth or not? A recent happiness survey conducted in China gives some answers.

  20. A problem-based learning curriculum and undergraduate ...

    African Journals Online (AJOL)

    learning.[3] Central to the approach is the use of problems, which are posed to .... collected through surveys or interviews soliciting information from .... McParland M, Noble ML, Livingston G. The effectiveness of problem based learning.

  1. 二次分配问题及其求解方法的研究进展(Ⅱ)%Surveys on the Studies of Solution Methods to the Quadratic Assignment Problem

    Institute of Scientific and Technical Information of China (English)

    张惠珍; 马良; 王洪刚

    2011-01-01

    Quadratic assignment problem (QAP) is a NP-hard combinatorial optimization problem. In the past years,linearizations of the QAP,as well as low bounds for QAP are very important in solving QAP to optimality by exact algorithms. In this paper,the developments and recent work on linearizations of the QAP and its low bounds are reviewed.Furthermore,the research tendency of solving QAP by linearizations is also disoussed.%二次分配问题(Quadratic assignment problem,QAP)属于NP-hard组合优化难题.过去几十年,线性化技术和下界计算方法是利用经典算法求解二次分配问题的关键所在.本文简要回顾了目前QAP问题的线性化技术和下界计算方法的研究进展,最后讨论了利用线性化技术求解二次分配问题及其下界的发展趋势.

  2. What Are Probability Surveys?

    Science.gov (United States)

    The National Aquatic Resource Surveys (NARS) use probability-survey designs to assess the condition of the nation’s waters. In probability surveys (also known as sample-surveys or statistical surveys), sampling sites are selected randomly.

  3. Ethical Problems in Advising Theses and Dissertations.

    Science.gov (United States)

    Schiff, Frederick; Ryan, Michael

    1996-01-01

    Reports results of a survey investigating what practices journalism faculty advisers perceive as appropriate and ethical (when advising theses and dissertations) in several potentially troublesome areas: problems with appropriation of student work; problems of joint authorship; appropriateness of adviser input; reasons for writing a thesis or…

  4. Survey Expectations

    OpenAIRE

    Martin Weale

    2005-01-01

    This paper focusses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations hypothesis which focusses on average expectations rather than individual expectations is advanced. Other models of expectations formation, such as the adaptive expectations hypothesis, are briefly discussed. ...

  5. Survey Expectations

    OpenAIRE

    Pesaran, M.H.; Weale, M.

    2005-01-01

    This paper focuses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations hypothesis which focuses on average expectations rather than individual expectations is advanced. Other models of expectations formation, such as the adaptive expectations hypothesis, are briefly discussed. Te...

  6. Survey expectations

    OpenAIRE

    Pesaran, Mohammad Hashem; Weale, Martin R.

    2005-01-01

    This paper focuses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations hypothesis which focuses on average expectations rather than individual expectations is advanced. Other models of expectations formation, such as the adaptive expectations hypothesis, are briefly discussed. Te...

  7. The Password Problem

    Energy Technology Data Exchange (ETDEWEB)

    Walkup, Elizabeth [Stanford Univ., CA (United States)

    2016-06-01

    Passwords are an ubiquitous, established part of the Internet today, but they are also a huge security headache. Single sign-on, OAuth, and password managers are some of the solutions to this problem. OAuth is a new, popular method that allows people to use large, common authentication providers for many web applications. However, it comes at the expense of some privacy: OAuth makes users easy to track across websites, applications, and devices. Password managers put the power in the hands of the users, but this vulnerability survey reveals that you have to be extremely careful which program you choose. All in all, password managers are the solution of choice for home users and small organizations, but large companies will probably want to invest in their own SSO solutions.

  8. Surveying Education

    DEFF Research Database (Denmark)

    Enemark, Stig

    2009-01-01

    In relation to surveying education there is one big question to be asked: Is the role of the surveyors changing? In a global perspective the answer will be "Yes". There is a big swing that could be entitled "From Measurement to Management". This does not imply that measurement is no longer a rele...... on an efficient interaction between education, research, and professional practice.......In relation to surveying education there is one big question to be asked: Is the role of the surveyors changing? In a global perspective the answer will be "Yes". There is a big swing that could be entitled "From Measurement to Management". This does not imply that measurement is no longer....... In surveying education there are a range of other challenges to be faced. These relate to the focus on learning to learn; the need for flexible curriculum to deal with constant change; the move towards introducing virtual academy; the demand for creating a quality culture; and the perspective of lifelong...

  9. Sexual Problems in Men

    Science.gov (United States)

    Many men have sexual problems. They become more common as men age. Problems can include Erectile dysfunction Reduced or lost interest in sex ... problems may also be factors. Occasional problems with sexual function are common. If problems last more than ...

  10. The study of cuckoo optimization algorithm for production planning problem

    OpenAIRE

    Akbarzadeh, Afsane; Shadkam, Elham

    2015-01-01

    Constrained Nonlinear programming problems are hard problems, and one of the most widely used and common problems for production planning problem to optimize. In this study, one of the mathematical models of production planning is survey and the problem solved by cuckoo algorithm. Cuckoo Algorithm is efficient method to solve continues non linear problem. Moreover, mentioned models of production planning solved with Genetic algorithm and Lingo software and the results will compared. The Cucko...

  11. Data collection for the Sloan Digital Sky Survey - A network-flow heuristic

    Energy Technology Data Exchange (ETDEWEB)

    Lupton, R.; Miller Maley, F. [Princeton Univ., NJ (United States); Young, N. [Dartmouth College, Hanover, NH (United States)

    1996-12-31

    This note describes a combinatorial optimization problem arising in the Sloan Digital Sky Survey and an effective heuristic for the problem that has been implemented and will be used in the Survey. The heuristic is based on network flow theory.

  12. Discussion on the Existing Problems and Main Work of Hydrogeology Survey Work%矿区水工环地质勘查主要内容与存在问题探讨

    Institute of Scientific and Technical Information of China (English)

    李福寿; 尤阳阳; 黄恺

    2015-01-01

    通过对矿区矿床充水影响因素调查、矿区岩层构造工程勘查及矿区周围环境影响因素调查,综合评价出地质勘查开发对矿区水文环境、岩层及周边环境可能造成的影响;根据历年水工环地质勘查实践,对目前矿区水工环勘查中存在的误区进行剖析,从转变观念提高认识和科技创新等方面入手,建议创建矿区水工环信息化平台,为矿区地质灾害防治提供依据.%Through the investigation on the impact of deposit water filling factors, prospecting mining strata structure and the influence factors of the surrounding environment, this paper comprehensively evaluates that the geological prospecting effect may affect the development of hydrology, rock mining area and the surrounding environment. According to the hydrogeology survey over the years and existing misunderstanding of hydrological-engineering-environmental investigation, this paper suggest to create hydrological-engineering-environmental informatization platform, providing a basis for geological disaster prevention.

  13. 新一代开源OPAC的现状调查与问题分析%Status Survey and Problem Analysis for Open Source Software of the New Generation OPAC

    Institute of Scientific and Technical Information of China (English)

    王海英

    2011-01-01

    In the research and practice of the new generation OPAC, the open source software OPAC has played an important role. This paper selected six mature and representative pen source software OPACs as respondent and analyzed three major problems under the stat%在新一代OPAC的研究与实践中,开源OPAC已成为不容忽视的一支力量。本文选取6款较为成熟且具代表性的开源OPAC系统作为调查对象,针对对当前开源OPAC的现状所反映出的3个主要问题进行了分析,并提出了一些想法。

  14. Surveys of cognitive status to mental health problems in rural residents%农村居民对精神卫生问题认知状况调查

    Institute of Scientific and Technical Information of China (English)

    巫颖; 陶红梅; 张一; 何艳平; 贺荣杰; 李玉凤; 张金胜

    2015-01-01

    目的:了解农村居民对精神卫生问题的认知状况。方法对680名农村居民采用自制精神卫生问题认识及态度调查问卷进行测评分析。结果80.9%的居民通过周围的真实病例了解精神卫生知识,94.2%的居民知晓精神疾病临床症状为幻觉、冲动伤人,仅18.8%的居民认为冷淡孤僻、注意障碍也是精神病的症状。认为精神疾病不具传染性、可以治愈、不会遗传的比例分别为97.0%、85.5%、66.1%。>80.6%的居民对与少年儿童有关的精神卫生知识了解较好,67.1%的居民认为精神病人受到歧视。文化程度越高的居民对精神卫生问题的认知越高。结论农村居民对精神卫生问题有不同程度的认知,文化程度越高,对精神卫生问题的认知水平越高。%Objective To investigate cognitive status to mental health problems in rural residents .Methods Assessments were conducted with Self‐made Questionnaire for Cognition and Attitude to Mental Health Knowledge in 680 rural residents .Results Of the residents 80 .9% comprehended mental health knowl‐edge via ambient real cases ,94 .2% knew that hallucinations and aggressive acts were clinical symptoms of mental disorders ,only 18 .8% did that indifference/unsociability and disturbance of attention were also clinical symptoms of mental disorders .The proportion of believing that mental illness was non‐contagious , curable and non‐genetic w as 97 .0% ,85 .5% and 66 .1% respectively .Over 80 .6% comprehended children‐related better .67 .1 percent thought that psychotics were discriminated .The higher educational the inhab‐itants had ,the higher cognition to mental health problems they did .Conclusion Rural residents have dif‐ferent cognitions to mental health problems ,the higher educational the inhabitants had ,the higher cogni‐tion to mental health problems they did .

  15. Multiple Surveys of Students and Survey Fatigue

    Science.gov (United States)

    Porter, Stephen R.; Whitcomb, Michael E.; Weitzer, William H.

    2004-01-01

    This chapter reviews the literature on survey fatigue and summarizes a research project that indicates that administering multiple surveys in one academic year can significantly suppress response rates in later surveys. (Contains 4 tables.)

  16. Youth Gangs: Experience from a Pilot Survey

    Science.gov (United States)

    Salagaev, A. L.; Shashkin, A. V.

    2005-01-01

    The present article is based on the results of an expert survey and a survey of young people in the schools of two Russian cities, Moscow and Kazan (2003). The study focused on making the research problem more explicit and testing the set of instruments, which was developed with the authors' participation in the framework of the Eurogang research…

  17. Geological and geochemical survey of gas hydrate deposits. Present status and future problems of R/D program; Gasuhaidoredo kosho no chishitsu {center_dot} chikagaku tansa. Genjo to kadai

    Energy Technology Data Exchange (ETDEWEB)

    Matsumoto, R. [The Unibersity of Tokyo, Tokyo (Japan)

    1999-11-25

    Recent development of marine geological/geophysical investigations have revealed that (1) gas hydrates are widely distributed in deep shelf to slope sediments and (2) gas-hydrate-bearing sediments are underlain by a relatively thick free gas zone. This implies that [gas hydrate deposits] should be considered as a package of soild hydrate and free gas. An important parameter in resource evaluation is volume assessment of methane reserves, however, there are a number of issues to estimate even the total amount of methane trapped in gas hydrate deposits. There are a number of issues to be solved to estimate recoverable reserves of gas hydrate deposits. The issues include the discrepancy between BSR and BGHS and the nature and origin of double BSRs. Also another urgent and important theme is the generic link between gas hydrate formation and bacterial activity of deep biosphere. Stratigraphic Drilling of [Nankai Trough] by JNOC in 1999 and planned ODP drilling in the western Nankai Trough in 2000 are[expected to give clues to solve these problems. (author)

  18. 交通事故精神伤残照料者的心理问题及服务需求调查%Survey to psychological problems and service needs for caregivers of mental disability in traffic accidents

    Institute of Scientific and Technical Information of China (English)

    李方敏; 蒋兆飞

    2015-01-01

    Objective To investigate psychological problems and service needs for caregivers of mental disabilities in traffic acci-dents and to provide scientific basis for promoting psychosomatic health and improving ways of coping of family caregivers. Methods According to inclusion criteria and exclusion criteria,187 family caregivers were chosen from 388 appraisal cases and divided into three groups:severe group A,moderate group B and mild group C,which were based on different degrees of disablement. Two forensic ex-aminers also used a self - designed questionnaire,and Self - reporting Inventory(SCL - 90)to investigate and analyze psychological health problems of the three groups from May 2013 to May 2014. Results Total scores and all factor scores of SCL - 90 in three groups were significantly higher than those in national norm(P < 0. 05). Total score and most factors scores of SCL - 90 in group A were significantly higher than those in group B(P < 0. 05)except for hostility and paranoid,and were significantly higher than those in group C(P < 0. 01)except for anxiety,hostility and paranoid. Factor scores of somatization,compelling,depression and horror in group B were significantly higher than those in group C(P < 0. 05). The service needs were aimed at focusing on how to appeal for claim after identification(26. 20% ),the follow - up rehabilitation therapy(22. 99% ),the credibility of identification quality (13. 90% ),how much to receive after identification(13. 90% ),the necessary item identification(11. 23% )and ways to apply for lawful aid(10. 69% ). Conclusion Psychological health problems are common among family caregivers of mental - disability,and different psychological problems exist in caregivers of different disability class. Therefore we suggest that giving the caregivers more psy-chological supports is deserved,which can enhance their positive ways of coping.%目的:探讨交通事故精神伤残照料者的心理问题及服务需求,为促进照料

  19. Problem Analysis and Countermeasures Innovation about the Tourism Higher Education Based on the Status Survey%基于现状调查的高等旅游教育问题分析及对策创新

    Institute of Scientific and Technical Information of China (English)

    王晖

    2012-01-01

    通过现场访谈、电话访问、电子邮件等途径对各省10所高校旅游管理专业学生进行的问卷调查发现,旅游专业学生在就业信心、专业素养和人文素养等方面均存在明显不足。而目前我国旅游教育双师型教学人才十分缺乏、旅游实践课程相对不足、人才培养绩效缺乏评估、旅游教育就业功能弱化。新形势下高等旅游教育改革要突破专业瓶颈,鼓励教师深化学习和参与实践;创新教学模式,不断拓宽旅游实践途径;改革评估机制,完善旅游教育绩效考评;对接市场需要,打造“可持续就业”学习平台,为培养高素质国际旅游人才创造条件。%Through a survey of interview, telephone access and email among the tourism management students of 10 colleges in many province, the researchers found that both the professional quality and humane quality are obvious shortcomings, and a lot of the students are lack of employment confidence. At present, double division teaching talents of tourism edu- cation are very poor, tourism practice course and talent training performance evaluation are relatively shortage, and the employment functions of tourism education are weakening. Under the new situation, higher education reform should break through tourism professional bottleneck, encourage teachers to deepen the study and participate in practice, inno vating teaching mode and expanding tourism pract/cal ways, reforming the evaluation mechanism and improving the tourism education performance evaluation, docking market need and creating "sustainable employment" learning platform to train high quality international tourism talents.

  20. 高职学生英语听力困难消减之三维驱动路径--基于认知语言学视角%Listening Problems Survey on Vocational College Students and the Reduction Path of Three dimensional Drives---Based on the Perspective of Cognitive Linguistics

    Institute of Scientific and Technical Information of China (English)

    吾雅平

    2016-01-01

    The survey shows English listening problems commonly exist in vocational colleges. Viewing from the overall distribution, most problems lie in the layer of emotional filtration while others lie in the layers of linguistic cognition and studying management. Viewing from the individual distribution, the three biggest problems reported are anxiety and fear resulted from continuous setbacks and self-confidence sufferings, not being able to focus attention long, and being short of vocabulary. Using students’ self-retrospection reports for reference, the article analyzes their psychological course of linguistic cognition. Therefore, the problem reduction path of three dimensional drives was demonstrated. They are emotional filtration drive, linguistic cognition drive and studying management drive.%调研显示高职学生英语听力困难普遍存在。从整体分布看,困难最多在情感过滤层,其次是语言认知层和学习管理层;从单向分布看,报告最多的三项困难是自信心持续受挫导致紧张恐惧、注意力不能长久集中、词汇量不足。结合自省报告分析学生听力认知心理过程,并努力探寻困难消减的三维驱动路径,即情感过滤驱动、语言认知驱动和学习管理驱动。

  1. [Problems in Providing Care to Young Workers with Mental Health Disturbance - A Survey Using of the Cases of Workers Who Had Taken Sick Leave Due to Mental Health Disturbance].

    Science.gov (United States)

    Ikegami, Kazunori; Eguchi, Masafumi; Osaki, Yohei; Nakao, Tomo; Nakamoto, Kengo; Hiro, Hisanori

    2016-06-01

    In this study we discuss the measures of providing care to young workers with mental health disturbance by analyzing the cases of workers who had taken sick leave due to mental health disturbance. We analyzed 36 cases, collected from 11 occupational physicians, of workers who had taken sick leave due to mental health disturbance, and discuss measures for providing care to such young workers. We organized and classified data containing the details of the care provided to the workers and analyzed the main aspects and problems in providing it. We compared two age groups of workers: a below age 30 group, and an age 30 and above group. We observed that occupational nurses were more frequently the primary persons who dealt with workplace consultations in the below age 30 group (before sick leave: 38.9%; during sick leave: 38.9%) compared to the age 30 and above group (before sick leave: 16.7%, during sick leave: 11.1%). Most of the case providers expressed the opinion that a support system is necessary to help the workers return to work and it is an important factor in providing care to workers who have taken sick leave due to mental health disturbance. Coordination with the families of the workers was also important in the below age 30 group. It might be difficult to assign young workers to suitable workplaces or duties because of their inadequate job skills, lack of sufficient experience, and influence of personal factors on mental health. Our results suggest that it is important to provide appropriate care for young workers with mental health disturbance, such as support by occupational nurses, and to strengthen the collaboration between their families and the workplace staff.

  2. 独立学院工程教育专业人才培养调查及存在问题分析%Survey on independent professional training Institute of engineering education and problems found

    Institute of Scientific and Technical Information of China (English)

    杨斌

    2011-01-01

    This article is focused on research on students who major in engineering education in independent college of Agricultural University of Hebei,identification and evaluation of students in such areas as personnel training programs,classroom instruction and employment,self-employment ect.The research indicated that,there were some problems such as less flexibility,lack of character and lack of practice ability pertaining to personnel training programs curriculum provision in the cultivation of talents specialize in engineering education in independent college.This article also reveals that the establishment of professional scientific and reasonable structure,the improvement of teaching methods and the construction of entrepreneurship training environment are the key to improve personnel training.%以独立学院工程教育专业学生为研究对象,从学生对人才培养方案、课堂教学和就业创业的认同和评价等方面展开调查,结果发现,在独立学院工程教育专业人才培养中,存在人才培养方案课程设置弹性较小、缺乏特色和实践能力培养等问题,指出设置科学合理的专业结构、改善教学方法和构建自主创业能力培养环境是提高人才培养的关键。

  3. A cross-sectional survey on behavior problems among eco-migrant children of Hui and Han in Ningxia, China%宁夏生态移民地区儿童行为问题现况调查

    Institute of Scientific and Technical Information of China (English)

    颜国利; 方建群; 张朝霞; 冯丽平; 吴锦荣; 马馥荔; 陈诗祺; 赵冉然; 王颖丽

    2014-01-01

    Objective To investigate the detection rate and correlates of behavioral problems among eco-migrant children in Hui and Han ethnicities.Methods Using multistage randomized sampling method,2 653 eco-migrant teenagers,3 174 indigenous and 2 334 homeland peers were selected.Their parents were asked to finish the Achenbach' s Child Behavior Checklist (CBCL) and a self-developed correlates questionnaire.Results 765 eco-migrant children with behavioral problems were detected,with detection rate as 28.8%,higher than that of homeland group (24.2%) and native group (19.3%)(x2=73.547,P<0.012 5).Ecological migration mainly influenced factors as bad contacts,depression,obsessive-compulsive,discipline,attack for boys aged 6-11,bad contacts for boys aged 12-16 and extraversion behavioral problems for girls aged 12-16,in Hui.These factors both associated to eco-migrant children's behavioral problems in Hui and Han:cesarean section (OR =1.863,95% CI:1.144-3.035,for Han) and (OR=2.979,95% CI:2.067-4.293,for Hui),physical defects(OR=1.730,95%CI:1.087-2.751,for Han) and (OR=2.552,95%CI:1.649-3.950,for Hui),arable as a main income way(OR=1.272,95%CI:1.066-1.518,for Han) and (OR=1.212,95%CI:1.033-1.422,for Hui),parents' education level above middle school (OR=0.709,95% CI:0.539-0.932,for Han) and (OR=0.698,95%CI:0.542-0.898,for Hui),parents' frequently in good mood (OR=0.710,95%CI:0.613-0.821,for Han) and (OR=0.826,95%CI:0.718-0.949,for Hui).However,major diseases in the process of growth (OR=1.794,95% CI:1.163-2.767),and parents with chronic illness or disability (OR=1.463,95% CI:1.061-2.016) only associated with that in Han; single-parent or remarried families (OR=1.583,95% CI:1.078-2.325),parents often drinking (OR=1.557,95%CI:1.019-2.379),the time of parents' work longer than half a year(OR=1.494,95% CI:1.197-1.864),parents' more content to life now (OR=0.813,95% CI:0.700-0.945),and children in older age (OR=0.939,95%CI:0.889-0.991) only

  4. Preventing Diabetes Problems

    Science.gov (United States)

    ... Other Dental Problems Diabetes & Sexual & Urologic Problems Preventing Diabetes Problems View or Print All Sections Heart Disease & ... prevent or delay sexual and urologic problems. Depression & Diabetes Depression is common among people with a chronic, ...

  5. Infrastructure Survey 2011

    Science.gov (United States)

    Group of Eight (NJ1), 2012

    2012-01-01

    In 2011, the Group of Eight (Go8) conducted a survey on the state of its buildings and infrastructure. The survey is the third Go8 Infrastructure survey, with previous surveys being conducted in 2007 and 2009. The current survey updated some of the information collected in the previous surveys. It also collated data related to aspects of the…

  6. 上海市社区居民健康管理认知调查及有关问题研究%Survey of awareness and related problem of health management in Shanghai city communities

    Institute of Scientific and Technical Information of China (English)

    鲍勇

    2014-01-01

    目的 调查上海市社区居民健康管理认知情况,分析原因,提出相关建议.方法 2013年10月在上海市中心地区(徐汇区),上海市城乡结合区(闵行区),上海市郊区(金山区).分别调查800名健康管理认知门诊居民(医院和社区卫生服务中心各400人)共计2 400人,发放问卷2 400份,回收问卷2 082份,问卷回收率为86.75%.采用随机整群分层抽样方法,自行设计调查表格,并进行预实验.调查内容包括:家庭医生是否需要开展风险因素评估工作、家庭医生是否需要实施在校学生健康管理、家庭医生是否需要实施60岁以上人群健康管理、家庭医生是否需要实施养老机构老人健康管理、家庭医生是否需要实施特殊人群健康管理,对不同特征人群(就医类型、年龄、性别、婚姻状况、退休、职业、文化程度和医疗保障形式)的需求程度进行问卷调查.结果 当问及“家庭医生开展风险因素评估工作”、“家庭医生实施在校学生健康管理”、“家庭医生实施60岁以上人群健康管理”、“家庭医实施养老机构老人健康管理”、“家庭医生实施特殊人群健康管理”的需要时,认为无所谓(9.3%、7.4%、3.8%、6.2%和5.7%)和不需要(3.6%、4.4%、2.5%、4.2%和3.9%)的都在少数,多数人都认为需要(51.1%、52.9%、57.2%、55.6%和55.3%),其次为一般(24.5%、18.9%、12.4%、18.0%和16.5%)和非常需要(11.5%、16.4%、24.1%、16.0%和18.6%).其中,职业、退休与否、文化程度、医疗保险形式和不同年龄人群对以上健康管理工作的认识和需求程度不同.结论 加强健康管理人才的培养,针对不同人群开展有针对性的健康管理服务内容,提高社区居民健康管理服务.%Objective To survey health management cognition of residents in Shanghai city communities,and to analyze the causes,and to put forward related suggestions

  7. Survey report: Haiti.

    Science.gov (United States)

    Kent, M M

    1987-10-01

    With a population of 6.2 million, Haiti is one of the poorest, most densely populated countries in the Caribbean. According to a 1983 Contraceptive Prevalence Survey, fertility averages 6.2 children/woman compared with 6 children/woman in 1977. Moreover, the proportion of women in union practicing family planning declined from 14% in 1977 to 7% in 1983. Female sterilization increased slightly between 1977 and 1983, from 0.2 to 0.7% of women in union, but at the same time there were declines in the percentage of women using traditional methods such as withdrawal and rhythm as well as supply methods such as oral contraceptives and condoms. Concerns about health problems associated with use of the pill and the IUD were cited by many respondents in the 1983 survey as reasons for nonuse of modern methods. The increase in fertility has been created in part by a growing percentage of women in Haiti married or cohabitating. Of the 4321 respondents in the 1983 survey, 23% were married, 31% were cohabitating, and another 9% were in less stable unions. 10% of the formally married women and 7% of the women in noncohabitating unions used family planning compared with only 4% of cohabitating women. Women who had some secondary education were 2-3 times more likely to use contraception, while urban women had use rates twice those of rural residents. Another concern is the high infant mortality rate--107 deaths/1000 births in 1977--caused by poor sanitation and limited access to health services. 77% of Haitian mothers surveyed had given birth at home. 63% had received some prenatal care, but only 22% sought postnatal care. On the other hand, over 90% of the mothers breastfed their infants and over 80% of children over 5 years of age had been vaccinated against the major childhood diseases.

  8. Some unsolved problems in discrete mathematics and mathematical cybernetics

    Science.gov (United States)

    Korshunov, Aleksei D.

    2009-10-01

    There are many unsolved problems in discrete mathematics and mathematical cybernetics. Writing a comprehensive survey of such problems involves great difficulties. First, such problems are rather numerous and varied. Second, they greatly differ from each other in degree of completeness of their solution. Therefore, even a comprehensive survey should not attempt to cover the whole variety of such problems; only the most important and significant problems should be reviewed. An impersonal choice of problems to include is quite hard. This paper includes 13 unsolved problems related to combinatorial mathematics and computational complexity theory. The problems selected give an indication of the author's studies for 50 years; for this reason, the choice of the problems reviewed here is, to some extent, subjective. At the same time, these problems are very difficult and quite important for discrete mathematics and mathematical cybernetics. Bibliography: 74 items.

  9. Some unsolved problems in discrete mathematics and mathematical cybernetics

    Energy Technology Data Exchange (ETDEWEB)

    Korshunov, Aleksei D [S.L. Sobolev Institute for Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk (Russian Federation)

    2009-10-31

    There are many unsolved problems in discrete mathematics and mathematical cybernetics. Writing a comprehensive survey of such problems involves great difficulties. First, such problems are rather numerous and varied. Second, they greatly differ from each other in degree of completeness of their solution. Therefore, even a comprehensive survey should not attempt to cover the whole variety of such problems; only the most important and significant problems should be reviewed. An impersonal choice of problems to include is quite hard. This paper includes 13 unsolved problems related to combinatorial mathematics and computational complexity theory. The problems selected give an indication of the author's studies for 50 years; for this reason, the choice of the problems reviewed here is, to some extent, subjective. At the same time, these problems are very difficult and quite important for discrete mathematics and mathematical cybernetics. Bibliography: 74 items.

  10. A general framework for coloring problems: old results, new results, and open problems

    NARCIS (Netherlands)

    Broersma, Haitze J.

    2003-01-01

    In this survey paper we present a general framework for coloring problems that was introduced in a joint paper which the author presented at WG2003. We show how a number of different types of coloring problems, most of which have been motivated from frequency assignment, fit into this framework. We

  11. Handbook in nonresponse in household surveys

    NARCIS (Netherlands)

    Bethlehem, J.G.; Cobben, F.; Schouten, B.

    2011-01-01

    This volume presents an all-inclusive guide to the problem of nonresponse in household surveys, providing an overview of the theory while also describing practical implications. The book begins with a general overview of the nonresponse problem, outlining existing sources of error and guidelines for

  12. Interconnection policy: a theoretical survey

    Directory of Open Access Journals (Sweden)

    César Mattos

    2003-01-01

    Full Text Available This article surveys the theoretical foundations of interconnection policy. The requirement of an interconnection policy should not be taken for granted in all circumstances, even considering the issue of network externalities. On the other hand, when it is required, an encompassing interconnection policy is usually justified. We provide an overview of the theory on interconnection pricing that results in several different prescriptions depending on which problem the regulator aims to address. We also present a survey on the literature on two-way interconnection.

  13. A Generalized Orienteering Problem for Optimal Search and Interdiction Planning

    Science.gov (United States)

    2013-09-01

    Problem TOP Team Orienteering Problem VRP Vehicle Routing Problem VRPSP Vehicle Routing Problem with Selective Pickups xv THIS PAGE INTENTIONALLY LEFT...Vehicle Routing Problem ( VRP ) are related to the OP. A recent survey (Kumar and Panneerselvam 2012) and two books (Toth and Vigo 2002, Golden et al. 2008...contain detailed descriptions of most variants of the VRP as well as many popular heuristics and exact algorithms for solving them. A variant of the

  14. Big Surveys, Big Data Centres

    Science.gov (United States)

    Schade, D.

    2016-06-01

    Well-designed astronomical surveys are powerful and have consistently been keystones of scientific progress. The Byurakan Surveys using a Schmidt telescope with an objective prism produced a list of about 3000 UV-excess Markarian galaxies but these objects have stimulated an enormous amount of further study and appear in over 16,000 publications. The CFHT Legacy Surveys used a wide-field imager to cover thousands of square degrees and those surveys are mentioned in over 1100 publications since 2002. Both ground and space-based astronomy have been increasing their investments in survey work. Survey instrumentation strives toward fair samples and large sky coverage and therefore strives to produce massive datasets. Thus we are faced with the "big data" problem in astronomy. Survey datasets require specialized approaches to data management. Big data places additional challenging requirements for data management. If the term "big data" is defined as data collections that are too large to move then there are profound implications for the infrastructure that supports big data science. The current model of data centres is obsolete. In the era of big data the central problem is how to create architectures that effectively manage the relationship between data collections, networks, processing capabilities, and software, given the science requirements of the projects that need to be executed. A stand alone data silo cannot support big data science. I'll describe the current efforts of the Canadian community to deal with this situation and our successes and failures. I'll talk about how we are planning in the next decade to try to create a workable and adaptable solution to support big data science.

  15. Estimates from two survey designs: national hospital discharge survey.

    Science.gov (United States)

    Haupt, B J; Kozak, L J

    1992-05-01

    hospitals conducted by the American Hospital Association. The numerous significant differences in estimates for bed size categories between the two survey methodologies reflected the change in the universe and definition of beds for the new survey. Few statistically significant differences were found in the medical data using the old and the new survey methods. Two main differences, in estimates for cataract and alcohol dependence syndrome, may have resulted from problems with the new survey. A measurement error, reporting outpatients to the NHDS, is one possible explanation of the higher estimates for diagnosis of cataract using the new survey methods.(ABSTRACT TRUNCATED AT 400 WORDS)

  16. Survey of Hospital Medical Records Management Problems and Corre-sponding Solutions%调查分析医院病案管理中存在的问题及相应的解决措施

    Institute of Scientific and Technical Information of China (English)

    张素丽; 王晶

    2015-01-01

    目的:调查并探讨医院的病案管理中所存在的问题,并对其解决的措施加以研究分析。方法选择我院的内科科室,调查科室的医务人员对于病案管理工作的重视情况及病案利用情况,选取2013年9月—2014年8月期间收治的51例患者,设为试验组,同时选取2012年9月—2013年8月期间收治的51例患者,设为对照组。该院自2013年9月开始实施病案管理措施,比较实施前后两组的病案质量的情况、患者的投诉率及患者的满意程度。结果试验组患者的病案质量的完善率(92.54%)、患者的满意程度(98.04%)均明显高于对照组患者的病案质量的完善率(61.76%)、患者的满意程度(72.55%),统计学均有意义(P<0.05);试验组患者的投诉率(1.96%)明显低于对照组患者的投诉率(27.45%),差异有统计学意义(P<0.05)。结论实施有效的病案管理措施后,可以较大程度的提高病案质量的完善率、满足患者的期望值,使患者较为满意,应在临床上加以推广使用。%Objective To investigate and explore in the hospital medical records management problems and analyzed to study the measures to solve. Methods The medical department of our hospital, the investigation department of the medical staff's attention to the case management work situation and utilization of medical records, and from patients admitted to the department since September 2012 -2014 September period, 102 cases were randomly selected ,which were divided into a control group and the ex-perimental group two groups were 51 patients in the control group in September 2012 did not begin in September 2013 before the implementation of case management; experimental group in September 2013 -2014 case management measures implemented after September. Case, the rate of patient complaints and patient satisfaction were compared the quality of medical records. Results The medical

  17. Survey of psychological and behavioral problems of left-behind junior middle school students in rural area%农村留守初中生心理行为问题的调查

    Institute of Scientific and Technical Information of China (English)

    刘霞; 张跃兵; 李荣琴; 翟景花; 许艳

    2011-01-01

    Aim To explore unhealthy behavior,life events and coping style of left-behind junior middle school students in rural areas. Methods There 905 left-behind junior middle school students were recruited with multi-stage sampling method,Adolescent Life Events and Coping Strategies Scale were applied. Results The incidence of unhealthy behavior and life events in the left-behind students was 29.5%,most of the left-behind students were brought up by their father or mother alone or their grandparents. Compared to the non-left-behind students,the incidence of psychological,physical violence and skipping class of the left-behind students was much hiher (46.1% vs 31.8%; 50.6% vs 31.0%; 13.1% vs 8.5%),showing significant difference (P<0.05). The scores of the left-behind group were higher than the non-left-behind group,the differences of factors except deprivation were significant (P<0.05);and the scores of left-behind students in seeking support, enduring and escaping factors were higher than non-left-behind students (18.54±3.95 vs 17.87±3.90; 8.48± 2.71 vs 7.98±2.43;6.97±2.43 vs 6.56±2.20). Correlation analysis showed that the scores of Adolescent Life Events scale was positively correlated with the emotional coping strategies. Conclusion There were certain differences in unhealthy behavior,life events and coping strategies between the left-behind and non-left-behind students,life events was positively correlated with the emotional coping strategies of the left-behind students. The education and management of left-behind students in rural areas is a social problem to be solved for the good of the family, the students and the society.%目的 了解农村留守初中生不良行为、生活事件和应对方式及其之间的关系.方法 采用多阶段抽样方法,随机抽取济宁地区905名农村初中生,采用青少年生活事件量表和中学生应对方式量表对其进行测量.结果 农村留守初中生的发生率为29.5%,留守初中

  18. Class and Home Problems: Optimization Problems

    Science.gov (United States)

    Anderson, Brian J.; Hissam, Robin S.; Shaeiwitz, Joseph A.; Turton, Richard

    2011-01-01

    Optimization problems suitable for all levels of chemical engineering students are available. These problems do not require advanced mathematical techniques, since they can be solved using typical software used by students and practitioners. The method used to solve these problems forces students to understand the trends for the different terms…

  19. Class and Home Problems: Optimization Problems

    Science.gov (United States)

    Anderson, Brian J.; Hissam, Robin S.; Shaeiwitz, Joseph A.; Turton, Richard

    2011-01-01

    Optimization problems suitable for all levels of chemical engineering students are available. These problems do not require advanced mathematical techniques, since they can be solved using typical software used by students and practitioners. The method used to solve these problems forces students to understand the trends for the different terms…

  20. Stylometry of Painting Techniques - A Survey

    OpenAIRE

    Sanaz keshvari; Abdolah Chalechale

    2016-01-01

    To discover a scientific relationship for art is an interesting and challenging problem. Recognition of artist Identification and stylometry of painting have been important issues at artwork. Image processing techniques can be an effective solution for resolving these problem. To the best of our knowledge, these problems have not been widely investigated. This paper presents a comprehensive survey about both proposed stylometry approaches and artist identification. Finally, It also compares a...

  1. Stylometry of Painting Techniques - A Survey

    Directory of Open Access Journals (Sweden)

    Sanaz keshvari

    2016-12-01

    Full Text Available To discover a scientific relationship for art is an interesting and challenging problem. Recognition of artist Identification and stylometry of painting have been important issues at artwork. Image processing techniques can be an effective solution for resolving these problem. To the best of our knowledge, these problems have not been widely investigated. This paper presents a comprehensive survey about both proposed stylometry approaches and artist identification. Finally, It also compares and summarizes all reviewed methods.

  2. Practical Tools for Designing and Weighting Survey Samples

    Science.gov (United States)

    Valliant, Richard; Dever, Jill A.; Kreuter, Frauke

    2013-01-01

    Survey sampling is fundamentally an applied field. The goal in this book is to put an array of tools at the fingertips of practitioners by explaining approaches long used by survey statisticians, illustrating how existing software can be used to solve survey problems, and developing some specialized software where needed. This book serves at least…

  3. Practical Tools for Designing and Weighting Survey Samples

    Science.gov (United States)

    Valliant, Richard; Dever, Jill A.; Kreuter, Frauke

    2013-01-01

    Survey sampling is fundamentally an applied field. The goal in this book is to put an array of tools at the fingertips of practitioners by explaining approaches long used by survey statisticians, illustrating how existing software can be used to solve survey problems, and developing some specialized software where needed. This book serves at least…

  4. Problem Gambling in New Mexico: 1996 and 1998

    Science.gov (United States)

    Starling, Randall; Blankenship, Jason; May, Philip; Woodall, Gill

    2009-01-01

    Included in both the 1996 and 1998 Survey of Gambling Behavior in New Mexico was a scale of individual problem gambling. To assess problems related to gambling behavior, questions were developed using the DSM-IV criteria for pathological gambling. The purpose of this paper is to describe problem gamblers in New Mexico. Descriptive data indicate…

  5. Problem Gambling Among Ontario Students: Associations with Substance Abuse, Mental Health Problems, Suicide Attempts, and Delinquent Behaviours.

    Science.gov (United States)

    Cook, Steven; Turner, Nigel E; Ballon, Bruce; Paglia-Boak, Angela; Murray, Robert; Adlaf, Edward M; Ilie, Gabriela; den Dunnen, Wendy; Mann, Robert E

    2015-12-01

    This paper describes gambling problems among Ontario students in 2009 and examines the relationship between gambling problems and substance use problems, mental health problem indicators, and delinquent behaviors. Data were derived from the Ontario Student Drug Use and Health Survey of Ontario students in grades 7-12. Gambling problems were measured as 2 or more of 6 indicators of problem gambling. In total 2.8% of the students surveyed endorsed two or more of the problem gambling items. The odds of problem gamblers reporting mental distress was 4.2 times higher than the rest of the sample and the odds of problem gamblers reporting a suicide attempt were 17.8 times greater than the rest of the sample. In addition compared to the rest of the students, delinquent behaviors were also more common among problem gamblers, including theft (OR = 14.5), selling marijuana (OR = 19.6), gang fights (OR = 11.3) and carrying a handgun (OR = 11.2). In a multivariate analysis, substance-use problems, mental health problems, and the participation in a variety of delinquent behaviors remained significantly associated with youth problem gambling behavior. Students who report problem gambling behaviors show increased substance abuse, mental health, and delinquency/criminal problems that are similar to those seen among adult problem gamblers. The association between these problems suggests that these problems could be addressed in a unified manner.

  6. Problems with plastered external heat insulation. Probleme mit verputzter Aussenwaermedaemmung

    Energy Technology Data Exchange (ETDEWEB)

    Epple, H.; Foglia, A.; Preisig, H.; Pfefferkorn, J.

    1984-01-01

    Concerning execution, maintenance and service life, walls with plastered external heat insulation constitute an economic method. Owing to experience gained with plastered external heat insulation, it is possible today to provide reliable information on requirements made on ground material and operational execution. The author intends to contribute to a prevention of defects by giving concise examples. A survey on different types of external heat insulation is followed by a treatment of the problem areas of roof-edge connection, base end under ground, modernization of old buildings and cracks in plaster. Principal statements are made concerning steam diffusion, planning, materials and execution.

  7. CERN Mobility Survey

    CERN Multimedia

    GS Department

    2011-01-01

    The Institute of Shipping and Transport of the University of the Aegean and the National Technical University of Athens are partners with CERN in a study of mobility patterns between and within the CERN sites and to that effect have realized a mobility survey dedicated to the CERN community.         The study aims to understand: How you presently get around the CERN sites; What problems you encounter regarding mobility; What your needs are; What improvements you’d like to see; What measures you would like to see implemented most. The replies we receive will enable us to define a general policy promoting the diversity of mobility at CERN and to establish and quantify the strategic actions to be implemented for both the short and medium term. The objectives of the transport mobility plans are to: Facilitate mobility within and between the CERN sites by identifying adequate solutions in response to individual ...

  8. Content Analysis of Survey Feedback Meetings: An Evaluation Tool

    Science.gov (United States)

    1975-05-01

    AD-AO10 210 CONTENT ANALYSIS OF SURVEY FEEDBACK MEETINGS: AN EVALUATION TOOL Patricia A. Pecorella Michigan University Prepared for: Office of Naval...RECIPIENIT’S CATALOG NUMSEA 4, TITLE (#wtd$4bIII*) 5.&TYJ F REPORT 6PEFlIOg COVERlEO Content Analysis of Survey Feedback Meetings: Technical Report An...Ratings Coder Re1liability Evaluation Supervisory Leadership Consultant Roles Problem-Identification Survey Feedback Content Analysis Problem-Solving

  9. Numerical linear algebra for reconstruction inverse problems

    Science.gov (United States)

    Nachaoui, Abdeljalil

    2004-01-01

    Our goal in this paper is to discuss various issues we have encountered in trying to find and implement efficient solvers for a boundary integral equation (BIE) formulation of an iterative method for solving a reconstruction problem. We survey some methods from numerical linear algebra, which are relevant for the solution of this class of inverse problems. We motivate the use of our constructing algorithm, discuss its implementation and mention the use of preconditioned Krylov methods.

  10. Geometric problems in molecular biology and robotics.

    Science.gov (United States)

    Parsons, D; Canny, J

    1994-01-01

    Some of the geometric problems of interest to molecular biologists have macroscopic analogues in the field of robotics. Two examples of such analogies are those between protein docking and model-based perception, and between ring closure and inverse kinematics. Molecular dynamics simulation, too, has much in common with the study of robot dynamics. In this paper we give a brief survey of recent work on these and related problems.

  11. Robotic Surveying

    Energy Technology Data Exchange (ETDEWEB)

    Suzy Cantor-McKinney; Michael Kruzic

    2007-03-01

    -actuated functions to be controlled by an onboard computer. The computer-controlled Speedrower was developed at Carnegie Mellon University to automate agricultural harvesting. Harvesting tasks require the vehicle to cover a field using minimally overlapping rows at slow speeds in a similar manner to geophysical data acquisition. The Speedrower had demonstrated its ability to perform as it had already logged hundreds of acres of autonomous harvesting. This project is the first use of autonomous robotic technology on a large-scale for geophysical surveying.

  12. Outlier detection in surveying networks

    OpenAIRE

    Preweda, Edward

    2014-01-01

    The paper refers to the robust estimation methods, which allows to eliminate outliers in surveying networks. Network adjustment is performed by the method of least squares. A key problem is the correct selection of weights, resulting from the different standard deviations of observations. In the case of gross errors their impact on the results of the alignment can be minimized by reducing the weight of outstanding observations. The second solution is the elimination of such observations as th...

  13. A survey of urban reconstruction

    KAUST Repository

    Musialski, Przemyslaw

    2013-05-10

    This paper provides a comprehensive overview of urban reconstruction. While there exists a considerable body of literature, this topic is still under active research. The work reviewed in this survey stems from the following three research communities: computer graphics, computer vision and photogrammetry and remote sensing. Our goal is to provide a survey that will help researchers to better position their own work in the context of existing solutions, and to help newcomers and practitioners in computer graphics to quickly gain an overview of this vast field. Further, we would like to bring the mentioned research communities to even more interdisciplinary work, since the reconstruction problem itself is by far not solved. This paper provides a comprehensive overview of urban reconstruction. While there exists a considerable body of literature, this topic is still under active research. The work reviewed in this survey stems from the following three research communities: computer graphics, computer vision and photogrammetry and remote sensing. Our goal is to provide a survey that will help researchers to better position their own work in the context of existing solutions, and to help newcomers and practitioners in computer graphics to quickly gain an overview of this vast field. Further, we would like to bring the mentioned research communities to even more interdisciplinary work, since the reconstruction problem itself is by far not solved. © 2013 The Eurographics Association and John Wiley & Sons Ltd.

  14. The Chicken Problem.

    Science.gov (United States)

    Reeves, Charles A.

    2000-01-01

    Uses the chicken problem for sixth grade students to scratch the surface of systems of equations using intuitive approaches. Provides students responses to the problem and suggests similar problems for extensions. (ASK)

  15. Problems in differential equations

    CERN Document Server

    Brenner, J L

    2013-01-01

    More than 900 problems and answers explore applications of differential equations to vibrations, electrical engineering, mechanics, and physics. Problem types include both routine and nonroutine, and stars indicate advanced problems. 1963 edition.

  16. Education for complex problem solving

    DEFF Research Database (Denmark)

    Kjær-Rasmussen, Lone Krogh

    The Problem-Based Learning model as it is practiced at Aalborg University grew out of expectations for future graduates in the 1970s. Many changes and developments have taken place since then in the ways the principles and methodologies are practiced, due to changes in society and governmental re...... regulations. However, the basic educational principles and methodologies are still the same and seem to meet expectations from society and academic work places today. This is what surveys and research, done regularly, document. (see for instance Krogh, 2013)....

  17. Lesotho - Enterprise Survey

    Data.gov (United States)

    Millennium Challenge Corporation — The 2011 MCA-Lesotho baseline enterprise survey is a national survey of enterprises. The main objective of the survey was to assess the current status of businesses...

  18. Constipation and Defecation Problems

    Science.gov (United States)

    ... Home / Digestive Health Topic / Constipation and Defecation Problems Constipation and Defecation Problems Basics Resources Overview Constipation is one of the most frequent gastrointestinal complaints ...

  19. A Survey on PET Recycling Problems in Qom City, Iran

    Directory of Open Access Journals (Sweden)

    Gh Omrani, S Nasseri, A H Mahvi, Y Ghafuri

    2004-07-01

    Full Text Available Recycling process is developed in communities to decrease the volume of high solid wastes and prevent environmental pollution. Plastic is one of the most recyclable materials in municipal solid wastes (MSW with a high rate of application during the last decades. PET (poly ethylene therphtalate is one of the basic plastic compounds which are used in a variety of products such as textile fibers, bottles and other containers. Methods for PET recycling include mechanical and chemical processes and PET incineration. In this study which was conducted on MSW analysis in Qom (a city in the central region of Iran, known for increase of population and high migration, environmental pollutions such as high quantity of MSW, industries and vehicle contamination, noise pollution and municipal sewage, physical analysis of MSW was carried out to four geographical sites and in different seasons of the year 2002. Results showed the rate of PET production to be 0.44% of the total MSW production, depending on site characteristics and area, time and cultural specifications. It is concluded that approximately 700 tons of PET plastics are buried per year

  20. Pro-Lie Groups: A Survey with Open Problems

    Directory of Open Access Journals (Sweden)

    Karl H. Hofmann

    2015-07-01

    Full Text Available A topological group is called a pro-Lie group if it is isomorphic to a closed subgroup of a product of finite-dimensional real Lie groups. This class of groups is closed under the formation of arbitrary products and closed subgroups and forms a complete category. It includes each finite-dimensional Lie group, each locally-compact group that has a compact quotient group modulo its identity component and, thus, in particular, each compact and each connected locally-compact group; it also includes all locally-compact Abelian groups. This paper provides an overview of the structure theory and the Lie theory of pro-Lie groups, including results more recent than those in the authors’ reference book on pro-Lie groups. Significantly, it also includes a review of the recent insight that weakly-complete unital algebras provide a natural habitat for both pro-Lie algebras and pro-Lie groups, indeed for the exponential function that links the two. (A topological vector space is weakly complete if it is isomorphic to a power RX of an arbitrary set of copies of R. This class of real vector spaces is at the basis of the Lie theory of pro-Lie groups. The article also lists 12 open questions connected to pro-Lie groups.

  1. Survey Problems and Representation of Architectural Painted Surfaces

    Science.gov (United States)

    Carpiceci, M.

    2011-09-01

    The painted surfaces of a building are generally vertical walls and flat roofs or arched roofs. The detection of these objects must be prepared according to the reason why the metric operation is designed; metric control of the whole performance practice is crucial for the result to matches the predetermined needs. It's now clear that the acquisition of metric data, as the whole process of detection, can certainly not be left to an unidentified automation. The mere representation of point clouds transformed in mesh and processed into 'maps' can cover only a few limited requirements. Conservation and restoration also require the transformation of "discrete" three-dimensional data into two-dimensional representations, resulting in geometric transformations that require a new mindset, especially considering hardware and software potential. We want to propose a new type of projection end analysis as base for the development of representation systems that will transform three-dimensional models in two-dimensional projections for the conservation and restoration.

  2. Gambling Problems in the General Danish Population

    DEFF Research Database (Denmark)

    Harrison, Glenn W.; Jessen, Lasse J.; Lau, Morten

    We compare several popular survey instruments for measuring gambling behavior and gambling propensity to assess if they differ in their classification of individuals in the general adult Danish population. We also examine correlations with standard survey instruments for alcohol use, anxiety, dep...... ratesof detectable gambling risk groups, since gambling behavior is positively correlated with the decision to participate in gambling surveys. We also find that imposing a threshold gambling history leads to underestimation of the prevalence of gambling problems.......We compare several popular survey instruments for measuring gambling behavior and gambling propensity to assess if they differ in their classification of individuals in the general adult Danish population. We also examine correlations with standard survey instruments for alcohol use, anxiety...... and estimate prevalence of gambling problems using sample weights and controlling for sample selection. We find that 95.4% of the population has no detectable risk, 2.9% has an early risk, 0.8% has an intermediate risk, 0.7% has an advanced risk, and 0.2% can be classified as problem gamblers...

  3. Teaching, Learning and Assessing Statistical Problem Solving

    Science.gov (United States)

    Marriott, John; Davies, Neville; Gibson, Liz

    2009-01-01

    In this paper we report the results from a major UK government-funded project, started in 2005, to review statistics and handling data within the school mathematics curriculum for students up to age 16. As a result of a survey of teachers we developed new teaching materials that explicitly use a problem-solving approach for the teaching and…

  4. Problems and Failures in Library Automation.

    Science.gov (United States)

    Lancaster, F. Wilfrid, Ed.

    Drawn from the 15th Annual Clinic on Library Applications of Data Processing, held at the University of Illinois at Urbana-Champaign, the nine papers presented in this volume deal with problems--or, in some cases, downright failures--in the automation of various facets of library service. They range from a general survey of failures or limitations…

  5. Integer Programming Models for Computational Biology Problems

    Institute of Scientific and Technical Information of China (English)

    Giuseppe Lancia

    2004-01-01

    The recent years have seen an impressive increase in the use of Integer Programming models for the solution of optimization problems originating in Molecular Biology. In this survey, some of the most successful Integer Programming approaches are described, while a broad overview of application areas being is given in modern Computational Molecular Biology.

  6. A Case Base for Requirements Engineering: Problem Categories and Solution Techniques

    NARCIS (Netherlands)

    Sikkel, Klaas; Wieringa, Roel; Engmann, Rolf

    2000-01-01

    We introduce a notion of business problem frames, categorizing the type of IT requirements problems found in organizations, as opposed to Jackson’s problem frames which describe a problem in terms of the solution to that problem. A survey of students’ projects showed that this a viable notion. We in

  7. Longitudinal research strategies: advantages, problems, and prospects.

    Science.gov (United States)

    Farrington, D P

    1991-05-01

    The single-cohort, long-term longitudinal survey has many advantages in comparison with a cross-sectional survey in advancing knowledge about offending and other types of psychopathology, notably in providing information about onset and desistance, about continuity and prediction, and about within-individual change. However, the longitudinal survey also has significant problems, notably in confounding aging and period effects, delayed results, achieving continuity in funding and research direction, and cumulative attrition. This paper suggests the use of a multiple-cohort sequential strategy (the "accelerated longitudinal design") as a way of achieving the benefits of the longitudinal method while minimizing the problems in advancing knowledge about the natural history, causes, prevention, and treatment of psychopathological disorders.

  8. Non-standard and improperly posed problems

    CERN Document Server

    Straughan, Brian; Ames, William F

    1997-01-01

    Written by two international experts in the field, this book is the first unified survey of the advances made in the last 15 years on key non-standard and improperly posed problems for partial differential equations.This reference for mathematicians, scientists, and engineers provides an overview of the methodology typically used to study improperly posed problems. It focuses on structural stability--the continuous dependence of solutions on the initial conditions and the modeling equations--and on problems for which data are only prescribed on part of the boundary.The book addresses continuou

  9. PROBLEMS OF MIGRANT LABOR.

    Science.gov (United States)

    WALLS, FOREST

    PRESENT MIGRANT LABOR PROBLEMS AND SOLUTIONS WHICH HAVE BEEN PROPOSED ARE PRESENTED. THE FIRST PROBLEM AREA IS PROVIDING EDUCATION FOR MIGRANT CHILDREN. THIS IS HINDERED BY THE PROBLEM OF SECURING COMPLIANCE WITH MINIMUM EDUCATION LAWS AND BY LAWS PROHIBITING EMPLOYMENT OF CHILDREN DURING SCHOOL HOURS. A SECOND PROBLEM AREA IS THAT OF CHILD LABOR.…

  10. Diagnosing plant problems

    Science.gov (United States)

    Cheryl A. Smith

    2008-01-01

    Diagnosing Christmas tree problems can be a challenge, requiring a basic knowledge of plant culture and physiology, the effect of environmental influences on plant health, and the ability to identify the possible causes of plant problems. Developing a solution or remedy to the problem depends on a proper diagnosis, a process that requires recognition of a problem and...

  11. Quadratic eigenvalue problems.

    Energy Technology Data Exchange (ETDEWEB)

    Walsh, Timothy Francis; Day, David Minot

    2007-04-01

    In this report we will describe some nonlinear eigenvalue problems that arise in the areas of solid mechanics, acoustics, and coupled structural acoustics. We will focus mostly on quadratic eigenvalue problems, which are a special case of nonlinear eigenvalue problems. Algorithms for solving the quadratic eigenvalue problem will be presented, along with some example calculations.

  12. Problem gambling: a suitable case for social work?

    OpenAIRE

    Rogers, Jim

    2013-01-01

    Problem gambling attracts little attention from health and social care agencies in the UK. Prevalence surveys suggest that 0.6% of the population are problem gamblers and it is suggested that for each of these individuals, 10–17 other people, including children and other family members, are affected. Problem gambling is linked to many individual and social problems including: depression, suicide, significant debt, bankruptcy, family conflict, domestic violence, neglect and m...

  13. Green Wave Traffic Optimization - A Survey

    DEFF Research Database (Denmark)

    Warberg, Andreas; Larsen, Jesper; Jørgensen, Rene Munk

    The objective of this survey is to cover the research in the area of adaptive traffic control with emphasis on the applied optimization methods. The problem of optimizing traffic signals can be viewed in various ways, depending on political, economic and ecological goals. The survey highlights some......-based, approach, which is shown to be more suitable for adaptive traffic control. To support this claim three adaptive systems, which use alternatives to the classical optimization procedures, are described in detail....

  14. Europlat Employability Survey: Core findings and implications

    OpenAIRE

    Ježek Stanislav; Mareš Jan; Neusar Aleš

    2012-01-01

    Paper presents the core findings of the Europlat employability survey focusing on employability issues related to the post-Bologna transformations of psychology study programmes across the European Union. The objectives of the survey were to find out: (1) how relevant the employability/employment issue is; (2) what the current problems are in the employability/employment area; and (3) to explore the best practices in dealing with employability/employment issues. Findings cover both the nation...

  15. Hybrid IP/CP Methods for Solving Sports Scheduling Problems

    DEFF Research Database (Denmark)

    Rasmussen, Rasmus Vinther

    2006-01-01

    The field of sports scheduling comprises a challenging research areawith a great variety of hard combinatorial optimization problems andchallenging practical applications. This dissertation gives acomprehensive survey of the area and a number of new contributionsare presented. First a general sol...

  16. Assessing Mathematics 4. Problem Solving: The APU Approach.

    Science.gov (United States)

    Foxman, Derek; And Others

    1984-01-01

    Presented are examples of problem-solving items from practical and written mathematics tests. These tests are part of an English survey designed to assess the mathematics achievement of students aged 11 and 15. (JN)

  17. Adolescent problem behaviour: The gender gap in European perspective

    NARCIS (Netherlands)

    Thijs, P.E.; Dijk, I.K. van; Stoof, R.; Notten, N.J.W.R.

    2015-01-01

    This study scrutinizes gender differences in adolescent problem behaviour and its potential determinants, simultaneously taking into account the individual and contextual level, including personality, family and country characteristics. Using the 2010 EU Kids Online Survey, we estimate multilevel mo

  18. Handbook of web surveys

    NARCIS (Netherlands)

    Bethlehem, J.; Biffignandi, S.

    2012-01-01

    Best practices to create and implementhighly effective web surveys Exclusively combining design and sampling issues, Handbook of Web Surveys presents a theoretical yet practical approach to creating and conducting web surveys. From the history of web surveys to various modes of data collection to ti

  19. Problem solving III: factors influencing classroom problem

    Directory of Open Access Journals (Sweden)

    Sayonara Salvador Cabral da Costa

    1997-05-01

    Full Text Available This paper presents a review of the literature in the area of problem solving, particularly in physics, focusing only on factors that influence classroom problem solving. Fifty-seven papers have been analyzed in terms of theoretical basis, investigated factors/methodology and findings/relevant factors, which were organized in a table that served as support for a synthesis made by the authors. It is the third of a four-paper series reviewing different aspects of the problem solving subject.

  20. Using Electronic Surveys: Advice from Survey Professionals.

    Directory of Open Access Journals (Sweden)

    David M. Shannon

    2002-01-01

    Full Text Available The study reports the perceptions and recommendations of sixty-two experienced survey..researchers from the American Educational Research Association regarding the use of..electronic surveys. The most positive aspects cited for the use of electronic surveys were..reduction of costs (i.e., postage, phone charges, the use of electronic mail for pre-notification or..follow-up purposes, and the compatibility of data with existing software programs. These..professionals expressed limitations in using electronic surveys pertaining to the limited..sampling frame as well as issues of confidentiality, privacy, and the credibility of the sample...They advised that electronic surveys designed with the varied technological background and..capabilities of the respondent in mind, follow sound principles of survey construction, and be..administered to pre-notified, targeted populations with published email addresses.

  1. Sampling survey methodology issues of SBS- survey

    OpenAIRE

    Liljana Boci; Elona Berberi

    2015-01-01

    This paper aims at providing an insight on what is required to build an efficient and high quality business statistics from sample survey procedures, and on the effective and appropriate use of survey data in analysis. It aims at describing a general overview of what is required to have a good survey estimate. It shows in practice how to estimate characteristics of the population in SBS considering: weighting, non-response adjustments, post stratification, estimating a population totals, the ...

  2. Sampling survey methodology issues of SBS- survey

    Directory of Open Access Journals (Sweden)

    Liljana Boci

    2015-07-01

    Full Text Available This paper aims at providing an insight on what is required to build an efficient and high quality business statistics from sample survey procedures, and on the effective and appropriate use of survey data in analysis. It aims at describing a general overview of what is required to have a good survey estimate. It shows in practice how to estimate characteristics of the population in SBS considering: weighting, non-response adjustments, post stratification, estimating a population totals, the identification and treatment of outliers, and analyses of coefficient of variation. It provides sources of errors and gives recommendations of how to improve them throw sample survey techniques.

  3. From patient surveys to organizational change

    DEFF Research Database (Denmark)

    Nielsen, Jørn Flohr; Riiskjær, Erik

    2013-01-01

    the information to change procedures and increase patient satisfaction. Thus, the article analyses the local adoption of semi-customized patient surveys and actor responses to survey results. Patient survey data from 100 Danish wards are related to ex post comments from department heads/hospital managers......From a rational perspective, patient surveys should be tools for purposeful planned change. They are feedback on performance and provide input to problem-solving processes. However, in public health care there are well-documented institutional forces, including doctors’ and nurses’ norms, which...... might complicate a rational change process. To understand the dynamics, a rational perspective must include the institutional context. From this perspective, the aim of this article is to compare the use of patient surveys in different hospital units in order to understand why some units are able to use...

  4. Differential equations problem solver

    CERN Document Server

    Arterburn, David R

    2012-01-01

    REA's Problem Solvers is a series of useful, practical, and informative study guides. Each title in the series is complete step-by-step solution guide. The Differential Equations Problem Solver enables students to solve difficult problems by showing them step-by-step solutions to Differential Equations problems. The Problem Solvers cover material ranging from the elementary to the advanced and make excellent review books and textbook companions. They're perfect for undergraduate and graduate studies.The Differential Equations Problem Solver is the perfect resource for any class, any exam, and

  5. Health Problems in Pregnancy

    Science.gov (United States)

    Every pregnancy has some risk of problems. The causes can be conditions you already have or conditions you develop. ... pregnant with more than one baby, previous problem pregnancies, or being over age 35. They can affect ...

  6. Menstrual Cycle Problems

    Science.gov (United States)

    ... Read MoreDepression in Children and TeensRead MoreBMI Calculator Menstrual Cycle ProblemsFrom missed periods to painful periods, menstrual cycle problems are common, but usually not serious. Follow ...

  7. Challenging problems in algebra

    CERN Document Server

    Posamentier, Alfred S

    1996-01-01

    Over 300 unusual problems, ranging from easy to difficult, involving equations and inequalities, Diophantine equations, number theory, quadratic equations, logarithms, more. Detailed solutions, as well as brief answers, for all problems are provided.

  8. Types of Learning Problems

    Science.gov (United States)

    ... Ear Nose & Throat Emotional Problems Eyes Fever From Insects or Animals Genitals and Urinary Tract Glands & Growth ... important distinction is that this is not a vision problem ; rather, the brain is reversing, inverting or ...

  9. A survey of modal synthesis methods.

    Science.gov (United States)

    Hart, G. C.; Hurty, W. C.; Collins, J. D.

    1971-01-01

    Several modal synthesis procedures for the dynamic analysis of largy composite structural systems are surveyed. The matrix formulation of the free-free modal synthesis procedures is presented. Also given are schematic flow charts of the analysis procedure used in three prominent methods. The advantages and disadvantages of several modal synthesis methods for different classes of structural problems are presented in order to enable the engineer to select the best procedure for his particular type of problem.

  10. High resolution survey for topographic surveying

    Science.gov (United States)

    Luh, L. C.; Setan, H.; Majid, Z.; Chong, A. K.; Tan, Z.

    2014-02-01

    In this decade, terrestrial laser scanner (TLS) is getting popular in many fields such as reconstruction, monitoring, surveying, as-built of facilities, archaeology, and topographic surveying. This is due the high speed in data collection which is about 50,000 to 1,000,000 three-dimensional (3D) points per second at high accuracy. The main advantage of 3D representation for the data is that it is more approximate to the real world. Therefore, the aim of this paper is to show the use of High-Definition Surveying (HDS), also known as 3D laser scanning for topographic survey. This research investigates the effectiveness of using terrestrial laser scanning system for topographic survey by carrying out field test in Universiti Teknologi Malaysia (UTM), Skudai, Johor. The 3D laser scanner used in this study is a Leica ScanStation C10. Data acquisition was carried out by applying the traversing method. In this study, the result for the topographic survey is under 1st class survey. At the completion of this study, a standard of procedure was proposed for topographic data acquisition using laser scanning systems. This proposed procedure serves as a guideline for users who wish to utilize laser scanning system in topographic survey fully.

  11. Problem Solving and Reasoning.

    Science.gov (United States)

    1984-02-01

    6 here Acquisition of Problem - Solving Skill . An imporrant qLestinn is how the knowledge required For solving problems in a domain such as geometry is...Neves, 0. 4. (1981). Acquisition of problem - solving skill . In J. R. Anderson (Eds), Cognitive skills and their acquisition. Hillsdale, NJ: Erlbaum...NJ: Erlbaum. Voss, J. F., Greene, T. R., Post, T. A., & Penner, B. C. (1983). Problem solving skill in the social sciences. In G. H. Bower (Ed.), The

  12. Classifying IS Project Problems

    DEFF Research Database (Denmark)

    Munk-Madsen, Andreas

    2006-01-01

    The literature contains many lists of IS project problems, often in the form of risk factors. The problems sometimes appear unordered and overlapping, which reduces their usefulness to practitioners as well as theoreticians. This paper proposes a list of criteria for formulating project problems...

  13. Vehicle Routing Problem Models

    Directory of Open Access Journals (Sweden)

    Tonči Carić

    2004-01-01

    Full Text Available The Vehicle Routing Problem cannot always be solved exactly,so that in actual application this problem is solved heuristically.The work describes the concept of several concrete VRPmodels with simplified initial conditions (all vehicles are ofequal capacity and start from a single warehouse, suitable tosolve problems in cases with up to 50 users.

  14. Optimal obstacle control problem

    Institute of Scientific and Technical Information of China (English)

    ZHU Li; LI Xiu-hua; GUO Xing-ming

    2008-01-01

    In the paper we discuss some properties of the state operators of the optimal obstacle control problem for elliptic variational inequality. Existence, uniqueness and regularity of the optimal control problem are established. In addition, the approximation of the optimal obstacle problem is also studied.

  15. Mathematics as Problem Solving.

    Science.gov (United States)

    Soifer, Alexander

    This book contains about 200 problems. It is suggested that it be used by students, teachers or anyone interested in exploring mathematics. In addition to a general discussion on problem solving, there are problems concerned with number theory, algebra, geometry, and combinatorics. (PK)

  16. Handbook of web surveys

    CERN Document Server

    Bethlehem, Jelke

    2011-01-01

    BEST PRACTICES TO CREATE AND IMPLEMENTHIGHLY EFFECTIVE WEB SURVEYS Exclusively combining design and sampling issues, Handbook of Web Surveys presents a theoretical yet practical approach to creating and conducting web surveys. From the history of web surveys to various modes of data collection to tips for detecting error, this book thoroughly introduces readers to the this cutting-edge technique and offers tips for creating successful web surveys. The authors provide a history of web surveys and go on to explore the advantages and disadvantages of this mode of dat

  17. Environmental survey preliminary report, Mound Plant, Miamisburg, Ohio

    Energy Technology Data Exchange (ETDEWEB)

    1987-03-01

    This report presents the preliminary findings from the first phase of the Environmental Survey of the United States Department of Energy (DOE) Mound Plant, conducted August 18 through 29, 1986. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with the Mound Plant. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. The on-site phase of the Survey involves the review of existing site environmental data, observations of the operations carried on at the Mound Plant, and interviews with site personnel. The Survey found no environmental problems at the Mound Plant that represent an immediate threat to human life. The environmental problems identified at the Mound Plant by the Survey confirm that the site is confronted with a number of environmental problems which are by and large a legacy from past practices at a time when environmental problems were less well understood. Theses problems vary in terms of their magnitude and risk, as described in this report. Although the sampling and analysis performed by the Mound Plant Survey will assist in further identifying environmental problems at the site, a complete understanding of the significance of some of the environmental problems identified requires a level of study and characterization that is beyond the scope of the Survey. Actions currently under way or planned at the site, particularly the Phase II activities of the Comprehensive Environmental Analysis and Response Program (CEARP) as developed and implemented by the Albuquerque Operations Office, will contribute toward meeting this requirement. 85 refs., 24 figs., 20 tabs.

  18. The Reflective Teaching:the Concept, the Problems and the Strategies:Based on the Survey of Chinese EFL Teachers’ Reflective Teaching%教学反思的内涵、问题及对策-基于外语教师教学反思的调查分析

    Institute of Scientific and Technical Information of China (English)

    任风雷

    2016-01-01

    Based on the survey of "Chinese foreign language teachers’ reflective teaching",this study has explored the quo status of the Chinese EFL teachers ’ reflective teaching (Hereafter , RT ) , identifying the factors influencing teachers ’ reflection .We attempted to fathom the effect of the belief of education ,teaching efficacy and phases of teaching on teachers ’ reflection ;by analyzing the problems in teachers’ tendency in RT practice ,it also revealed the significance of training RT among teachers .The conclusion is :the belief of education ,disciplinary development of English teaching ,the educational administration and the knowledge of RT have affected the EFL teachers’ RT practice;The training and the encouragement of RT will help to improve the practicalization of the teaching theory and the theoreticalization of the personal teaching practice , and alleviate the conflict and crises in the current foreign language teaching field .%基于“中国外语教师反思状况”调查,探索中国外语教师教学反思现状、基本特征及影响反思的因素,通过外语教师教学反思的调查,揭示了影响反思的因素、问题及反思培训的意义,得出结论:教学理念、学科建设、教学管理和反思知识,会对外语教师教学反思产生深刻影响;开展反思培训、鼓励反思性教学,有利于提高外语教师个人理论实践化和实践理论化水平,促进教师专业发展,有利于解决当前外语教学中的问题。

  19. Sonet Network Design Problems

    CERN Document Server

    Pelleau, Marie; Truchet, Charlotte

    2009-01-01

    This paper presents a new method and a constraint-based objective function to solve two problems related to the design of optical telecommunication networks, namely the Synchronous Optical Network Ring Assignment Problem (SRAP) and the Intra-ring Synchronous Optical Network Design Problem (IDP). These network topology problems can be represented as a graph partitioning with capacity constraints as shown in previous works. We present here a new objective function and a new local search algorithm to solve these problems. Experiments conducted in Comet allow us to compare our method to previous ones and show that we obtain better results.

  20. Path Problems in Networks

    CERN Document Server

    Baras, John

    2010-01-01

    The algebraic path problem is a generalization of the shortest path problem in graphs. Various instances of this abstract problem have appeared in the literature, and similar solutions have been independently discovered and rediscovered. The repeated appearance of a problem is evidence of its relevance. This book aims to help current and future researchers add this powerful tool to their arsenal, so that they can easily identify and use it in their own work. Path problems in networks can be conceptually divided into two parts: A distillation of the extensive theory behind the algebraic path pr

  1. Sonet Network Design Problems

    Directory of Open Access Journals (Sweden)

    Marie Pelleau

    2009-10-01

    Full Text Available This paper presents a new method and a constraint-based objective function to solve two problems related to the design of optical telecommunication networks, namely the Synchronous Optical Network Ring Assignment Problem (SRAP and the Intra-ring Synchronous Optical Network Design Problem (IDP. These network topology problems can be represented as a graph partitioning with capacity constraints as shown in previous works. We present here a new objective function and a new local search algorithm to solve these problems. Experiments conducted in Comet allow us to compare our method to previous ones and show that we obtain better results.

  2. Bibliometric Analysis of Current Web Survey Research in China

    Institute of Scientific and Technical Information of China (English)

    ZHANG Qian; SHAO Peiji; FANG Jiaming

    2008-01-01

    In recent years, with the advancement of information technology and its application in survey activities, web surveys have not only greatly developed, but have also encountered many problems in China. An analysis of domestic research is important for better understanding of web surveys, to guide further research and application. This paper gives a bibliometric analysis of 120 domestic articles on web surveys from 1998 to 2006, on publication growth, author and organization distribution, journal distribution, and research subjects. Research on web surveys in China should make progress comparable with research abroad in comparative studies, specific studies, and technical application studies.

  3. Variational approach to various nonlinear problems in geometry and physics

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    In this survey, we will summarize the existence results of nonlinear partial differential equations which arises from geometry or physics by using variational method. We use the method to study Kazdan-Warner problem, Chern-Simons-Higgs model, Toda systems, and the prescribed Q-curvature problem in 4-dimension.

  4. Mapping Students Use of Technologies in Problem Based Learning Environments

    DEFF Research Database (Denmark)

    Rongbutsri, Nikorn; Khalid, Md. Saifuddin; Ryberg, Thomas

    2011-01-01

    This paper aims to understand how students use technology to enhance their learning in problem-based learning environments. The research methodology is based on both qualitative and quantitative studies. The results are based on students’ interviews, a survey and students’ reflections in course......-related blog posts; they show that students have positive perceptions toward using technologies in problem-based learning environments....

  5. Dyscalculia and Other Learning Problems in Arithmetic: A Historical Perspective.

    Science.gov (United States)

    Sharma, Mahesh C.

    1986-01-01

    Evidence on learning problems due to dyscalculia is surveyed. Definitions, factors responsible for dyscalculia, split-brain research and hemispheric roles, mathematics learning problems and personality, materials for instruction, and levels of knowing mathematics are among the topics discussed with an extensive list of references. (MNS)

  6. Problem Video Game Use and Dimensions of Psychopathology

    Science.gov (United States)

    Starcevic, Vladan; Berle, David; Porter, Guy; Fenech, Pauline

    2011-01-01

    The objective of this study was to examine associations between problem video game use and psychopathology. The Video Game Use Questionnaire (VGUQ) and the Symptom Checklist 90 (SCL-90) were administered in an international anonymous online survey. The VGUQ was used to identify problem video game users and SCL-90 assessed dimensions of…

  7. Problem Gambling Treatment within the British National Health Service

    Science.gov (United States)

    Rigbye, Jane; Griffiths, Mark D.

    2011-01-01

    According to the latest British Gambling Prevalence Survey, there are approximately 300,000 adult problem gamblers in Great Britain. In January 2007, the "British Medical Association" published a report recommending that those experiencing gambling problems should receive treatment via the National Health Service (NHS). This study…

  8. Problem Video Game Use and Dimensions of Psychopathology

    Science.gov (United States)

    Starcevic, Vladan; Berle, David; Porter, Guy; Fenech, Pauline

    2011-01-01

    The objective of this study was to examine associations between problem video game use and psychopathology. The Video Game Use Questionnaire (VGUQ) and the Symptom Checklist 90 (SCL-90) were administered in an international anonymous online survey. The VGUQ was used to identify problem video game users and SCL-90 assessed dimensions of…

  9. Online Help for Problem Gambling among Chinese Youths

    Science.gov (United States)

    Lee, Chang Boon Patrick

    2011-01-01

    The objectives of this study were to determine the perceptions and accessibility of online help for problem gambling among Chinese youths. A group of undergraduates participated in a survey cum laboratory exercise to search for help for problem gambling in Macao, Hong Kong, and China. Online search engines were used. During the search process,…

  10. Kiso Supernova Survey (KISS): Survey Strategy

    CERN Document Server

    Morokuma, Tomoki; Tanaka, Masaomi; Mori, Kensho; Matsumoto, Emiko; Kikuchi, Yuki; Shibata, Takumi; Sako, Shigeyuki; Aoki, Tsutomu; Doi, Mamoru; Kobayashi, Naoto; Maehara, Hiroyuki; Matsunaga, Noriyuki; Mito, Hiroyuki; Miyata, Takashi; Nakada, Yoshikazu; Soyano, Takao; Tarusawa, Ken'ichi; Miyazaki, Satoshi; Nakata, Fumiaki; Okada, Norio; Sarugaku, Yuki; Richmond, Michael W; Akitaya, Hiroshi; Aldering, Greg; Arimatsu, Ko; Contreras, Carlos; Horiuchi, Takashi; Hsiao, Eric Y; Itoh, Ryosuke; Iwata, Ikuru; Koji,; Kawabata, S; Kawai, Nobuyuki; Kitagawa, Yutaro; Kokubo, Mitsuru; Kuroda, Daisuke; Paolo,; Mazzali,; Misawa, Toru; Moritani, Yuki; Morrell, Nidia; Okamoto, Rina; Pavlyuk, Nikolay; Phillips, Mark M; Pian, Elena; Sahu, Devendra; Saito, Yoshihiko; Sano, Kei; Stritzinger, Maximilian D; Tachibana, Yutaro; Taddia, Francesco; Takaki, Katsutoshi; Tateuchi, Ken; Tomita, Akihiko; Tsvetkov, Dmitry; Ui, Takahiro; Ukita, Nobuharu; Urata, Yuji; Walker, Emma S; Yoshii, Taketoshi

    2014-01-01

    The Kiso Supernova Survey (KISS) is a high-cadence optical wide-field supernova (SN) survey. The primary goal of the survey is to catch the very early light of a SN, during the shock breakout phase. Detection of SN shock breakouts combined with multi-band photometry obtained with other facilities would provide detailed physical information on the progenitor stars of SNe. The survey is performed using a 2.2x2.2 deg field-of-view instrument on the 1.05-m Kiso Schmidt telescope, the Kiso Wide Field Camera (KWFC). We take a three-minute exposure in g-band once every hour in our survey, reaching magnitude g~20-21. About 100 nights of telescope time per year have been spent on the survey since April 2012. The number of the shock breakout detections is estimated to be of order of 1 during our 3-year project. This paper summarizes the KISS project including the KWFC observing setup, the survey strategy, the data reduction system, and CBET-reported SNe discovered so far by KISS.

  11. Kiso Supernova Survey (KISS): Survey strategy

    Science.gov (United States)

    Morokuma, Tomoki; Tominaga, Nozomu; Tanaka, Masaomi; Mori, Kensho; Matsumoto, Emiko; Kikuchi, Yuki; Shibata, Takumi; Sako, Shigeyuki; Aoki, Tsutomu; Doi, Mamoru; Kobayashi, Naoto; Maehara, Hiroyuki; Matsunaga, Noriyuki; Mito, Hiroyuki; Miyata, Takashi; Nakada, Yoshikazu; Soyano, Takao; Tarusawa, Ken'ichi; Miyazaki, Satoshi; Nakata, Fumiaki; Okada, Norio; Sarugaku, Yuki; Richmond, Michael W.; Akitaya, Hiroshi; Aldering, Greg; Arimatsu, Ko; Contreras, Carlos; Horiuchi, Takashi; Hsiao, Eric Y.; Itoh, Ryosuke; Iwata, Ikuru; Kawabata, Koji S.; Kawai, Nobuyuki; Kitagawa, Yutaro; Kokubo, Mitsuru; Kuroda, Daisuke; Mazzali, Paolo; Misawa, Toru; Moritani, Yuki; Morrell, Nidia; Okamoto, Rina; Pavlyuk, Nikolay; Phillips, Mark M.; Pian, Elena; Sahu, Devendra; Saito, Yoshihiko; Sano, Kei; Stritzinger, Maximilian D.; Tachibana, Yutaro; Taddia, Francesco; Takaki, Katsutoshi; Tateuchi, Ken; Tomita, Akihiko; Tsvetkov, Dmitry; Ui, Takahiro; Ukita, Nobuharu; Urata, Yuji; Walker, Emma S.; Yoshii, Taketoshi

    2014-12-01

    The Kiso Supernova Survey (KISS) is a high-cadence optical wide-field supernova (SN) survey. The primary goal of the survey is to catch the very early light of a SN, during the shock breakout phase. Detection of SN shock breakouts combined with multi-band photometry obtained with other facilities would provide detailed physical information on the progenitor stars of SNe. The survey is performed using a 2.2° × 2.2° field-of-view instrument on the 1.05-m Kiso Schmidt telescope, the Kiso Wide Field Camera (KWFC). We take a 3-min exposure in g-band once every hour in our survey, reaching magnitude g ˜ 20-21. About 100 nights of telescope time per year have been spent on the survey since 2012 April. The number of the shock breakout detections is estimated to be of the order of 1 during our three-year project. This paper summarizes the KISS project including the KWFC observing setup, the survey strategy, the data reduction system, and CBET-reported SNe discovered so far by KISS.

  12. Iowa Intensive Archaeological Survey

    Data.gov (United States)

    Iowa State University GIS Support and Research Facility — This shape file contains intensive level archaeological survey areas for the state of Iowa. All intensive Phase I surveys that are submitted to the State Historic...

  13. SURVEY, MCLEOD COUNTY, MN

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  14. SURVEY, KENT COUNTY, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  15. SURVEY, KENT COUNTY, DE

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  16. Patient survey (HCAHPS) - State

    Data.gov (United States)

    U.S. Department of Health & Human Services — A list of the state averages for the HCAHPS survey responses. HCAHPS is a national, standardized survey of hospital patients about their experiences during a recent...

  17. Sea Scallop Survey

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The standardized NEFSC Sea Scallop Survey began in 1980 and has covered an area from Cape Hatteras to Georges Bank. The survey aims to determine the distribution and...

  18. SURVEY, CHARLES COUNTY, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  19. NGS Survey Control Map

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NGS Survey Control Map provides a map of the US which allows you to find and display geodetic survey control points stored in the database of the National...

  20. SURVEY, SOLANO COUNTY, USA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Solano County California, hydrographic survey data collected by Harned Surveying and Engineering (HSE). Data collection period January 1, 2011 through March 1, 2011.

  1. SURVEY, BARNSTABLE COUNTY, MA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  2. Survey, OCONEE COUNTY, SC

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  3. SURVEY, BENTON COUNTY, TENNESSEE

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  4. SURVEY, TUSCALOSAA COUNTY, ALABAMA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  5. SURVEY, FREMONT COUNTY, COLORADO

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  6. SURVEY, DOUGLAS COUNTY, MN

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  7. SURVEY, OCONTO COUNTY, WI

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  8. SURVEY, OSCEOLA COUNTY, FLORIDA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  9. SURVEY, SANDERS COUNTY, MT

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  10. Large Pelagics Intercept Survey

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Large Pelagics Intercept Survey (LPIS) is a dockside survey of private and charterboat captains who have just completed fishing trips directed at large pelagic...

  11. SURVEY, CALHOUN COUNTY, TEXAS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  12. SURVEY, Mathews County, VA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  13. SURVEY, CALVERT COUNTY, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  14. SURVEY, VICTORIA COUNTY, TEXAS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  15. SURVEY, Somerset COUNTY, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  16. SURVEY, BROADWATER COUNTY, MT

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  17. 1998 Harrisburg Airport Survey

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set includes data collected in 1998 to evaluate the ability of lidar to survey airport obstructions in collaboration with NOAA National Geodetic Survey....

  18. Water Use: A Survey

    Science.gov (United States)

    Fleming, Rose Glee; Warden, Jessie

    1976-01-01

    A survey of Florida State University students showed that their current laundry practices generate energy and water over-consumption. The survey also resulted in some concrete suggestions to the students that would improve their conservation practices. (Author/BP)

  19. SURVEY, FAIRFIELD COUNTY, CT

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  20. SURVEY, CITRUS County, FL

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  1. SURVEY, BUFFALO COUNTY, NE

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  2. SURVEY, NANTUCKET COUNTY, MA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  3. SURVEY, HONOLULU COUNTY, HI

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  4. Surveys: an introduction.

    Science.gov (United States)

    Rubenfeld, Gordon D

    2004-10-01

    Surveys are a valuable research tool for studying the knowledge, attitudes, and behavior of a study population. This article explores quantitative analyses of written questionnaires as instruments for survey research. Obtaining accurate and precise information from a survey requires minimizing the possibility of bias from inappropriate sampling or a flawed survey instrument, and this article describes strategies to minimize sampling bias by increasing response rates, comparing responders to nonresponders, and identifying the appropriate sampling population. It is crucial that the survey instrument be valid, meaning that it actually measures what the investigator intends it to measure. In developing a valid survey instrument, it can be useful to adapt survey instruments that were developed by other researchers and to conduct extensive pilot-testing of your survey instrument.

  5. SURVEY, LAKE COUNTY, MT

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  6. SURVEY, MONO COUNTY, CALIFORNIA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  7. SURVEY, ATTALA COUNTY, MS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  8. SURVEY, NATCHITOCHES PARISH, USA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  9. SURVEY, CASCADE COUNTY, MT

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  10. SURVEY, POTTAWATTAMIE COUNTY, IA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  11. SURVEY, REFUGIO COUNTY, TEXAS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  12. Global Land Survey

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Global Land Survey (GLS) datasets are a collection of orthorectified, cloud-minimized Landsat-type satellite images, providing near complete coverage of the...

  13. Black Rail Pilot Survey

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Aural surveys using tape recorded calls proved to be an efficient and effective way to survey large expanses of shallow marsh for black rails (Laterallus...

  14. SURVEY, Baltomore City, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  15. SURVEY, Poquoson City, VA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  16. SURVEY, Caroline COUNTY, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  17. SURVEY, ATTALA COUNTY, MS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  18. SURVEY, GRAFTON COUNTY, NH

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  19. MAX and Survey Linkages

    Data.gov (United States)

    U.S. Department of Health & Human Services — CMS is interested in linking MAX files with survey data, including four surveys conducted by the National Center for Health Statistics (NCHS) - the National Health...

  20. HCAHPS Hospital Survey

    Data.gov (United States)

    U.S. Department of Health & Human Services — Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) Hospital Survey The intent of the HCAHPS initiative is to provide a standardized survey...

  1. National Health Care Survey

    Science.gov (United States)

    This survey encompasses a family of health care provider surveys, including information about the facilities that supply health care, the services rendered, and the characteristics of the patients served.

  2. MAX and Survey Linkages

    Data.gov (United States)

    U.S. Department of Health & Human Services — CMS is interested in linking MAX files with survey data, including four surveys conducted by the National Center for Health Statistics (NCHS) - the National Health...

  3. Patient survey (HCAHPS) - National

    Data.gov (United States)

    U.S. Department of Health & Human Services — The national average for the HCAHPS survey categories. HCAHPS is a national, standardized survey of hospital patients about their experiences during a recent...

  4. SURVEY, Cecil County, MD

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The field survey data for this coastal study includes a field report that exhibits photos and transect information collected in the field survey phase of the study....

  5. SURVEY, Lowndes County, MS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and...

  6. Near Duplicate Document Detection Survey

    Directory of Open Access Journals (Sweden)

    Bassma S. Alsulami

    2012-04-01

    Full Text Available Search engines are the major breakthrough on the web for retrieving the information. But List of retrieved documents contains a high percentage of duplicated and near document result. So there is the need to improve the performance of search results. Some of current search engine use data filtering algorithm which can eliminate duplicate and near duplicate documents to save the users’ time and effort. The identification of similar or near-duplicate pairs in a large collection is a significant problem with wide-spread applications. In this paper survey present an up-to-date review of the existing literature in duplicate and near duplicate detection in Web

  7. Surveying techniques in vibration measurement

    Directory of Open Access Journals (Sweden)

    Kuras Przemyslaw

    2015-01-01

    Full Text Available In order to determine the actual dynamic characteristics of engineering structures, it is necessary to perform direct measurements. The paper focuses on the problem of using various devices to measure vibration, with particular emphasis on surveying instruments. The main tool used in this study is the radar interferometer, which has been compared to: robotic total station, GNSS receivers and sensors (accelerometer and encoder. The results of four dynamic experiments are presented. They were performed on: industrial chimney, drilling tower, railway bridge and pedestrian footbridge. The obtained results have been discussed in terms of the requirements imposed by the standard ISO 4866:2010.

  8. GIS Readiness Survey 2014

    DEFF Research Database (Denmark)

    Schrøder, Lise; Hvingel, Line Træholt; Hansen, Henning Sten

    2014-01-01

    The GIS Readiness Survey 2014 is a follow-up to the corresponding survey that was carried out among public institutions in Denmark in 2009. The present survey thus provides an updated image of status and challenges in relation to the use of spatial information, the construction of the com- mon...

  9. China Executive Survey

    Institute of Scientific and Technical Information of China (English)

    CHENWEIXIAN

    2005-01-01

    Beiiing-based CTR Market Research recently completed a survey named China Business Executive Survey in the four Chinese dries of Beijing, Shanghai, Guangzhou and Shenzhen. The survey identified 340,000 senior executives in the four cities and found that around 20,000 ofthem have annual income of over 200,000yuan (US$24,000).

  10. Application of SAR Imagery in Submarine Topography Surveys

    Institute of Scientific and Technical Information of China (English)

    张宁川; 梁开龙; 桂力民

    2004-01-01

    An important research area in oceanographic surveying and mapping is to obtain submarine topography by remote sensing technique, especially by SAR imagery. In this article, problems related to SAR imagery are analyzed to provide references for the further research.

  11. Hilbert's seventh problem solutions and extensions

    CERN Document Server

    Tubbs, Robert

    2016-01-01

    This exposition is primarily a survey of the elementary yet subtle innovations of several mathematicians between 1929 and 1934 that led to partial and then complete solutions to Hilbert’s Seventh Problem (from the International Congress of Mathematicians in Paris, 1900). This volume is suitable for both mathematics students, wishing to experience how different mathematical ideas can come together to establish results, and for research mathematicians interested in the fascinating progression of mathematical ideas that solved Hilbert’s problem and established a modern theory of transcendental numbers. .

  12. Matrix interdiction problem

    Energy Technology Data Exchange (ETDEWEB)

    Pan, Feng [Los Alamos National Laboratory; Kasiviswanathan, Shiva [Los Alamos National Laboratory

    2010-01-01

    In the matrix interdiction problem, a real-valued matrix and an integer k is given. The objective is to remove k columns such that the sum over all rows of the maximum entry in each row is minimized. This combinatorial problem is closely related to bipartite network interdiction problem which can be applied to prioritize the border checkpoints in order to minimize the probability that an adversary can successfully cross the border. After introducing the matrix interdiction problem, we will prove the problem is NP-hard, and even NP-hard to approximate with an additive n{gamma} factor for a fixed constant {gamma}. We also present an algorithm for this problem that achieves a factor of (n-k) mUltiplicative approximation ratio.

  13. The Accelerated Kepler Problem

    CERN Document Server

    Namouni, Fathi

    2007-01-01

    The accelerated Kepler problem is obtained by adding a constant acceleration to the classical two-body Kepler problem. This setting models the dynamics of a jet-sustaining accretion disk and its content of forming planets as the disk loses linear momentum through the asymmetric jet-counterjet system it powers. The dynamics of the accelerated Kepler problem is analyzed using physical as well as parabolic coordinates. The latter naturally separate the problem's Hamiltonian into two unidimensional Hamiltonians. In particular, we identify the origin of the secular resonance in the accelerated Kepler problem and determine analytically the radius of stability boundary of initially circular orbits that are of particular interest to the problem of radial migration in binary systems as well as to the truncation of accretion disks through stellar jet acceleration.

  14. Gambling Problems in the General Danish Population

    DEFF Research Database (Denmark)

    Harrison, Glenn W.; Jessen, Lasse J.; Lau, Morten

    We compare several popular survey instruments for measuring gambling behavior and gambling propensity to assess if they differ in their classification of individuals in the general adult Danish population. We also examine correlations with standard survey instruments for alcohol use, anxiety......, depression and impulsivity. A feature of our design is that nobody was excluded on the basis of their response to a “trigger,” “gateway” or “diagnostic item” question about previous gambling history. Our sample consists of 8,405 adult Danes. We administered the Focal Adult Gambling Screen to all subjects...... and estimate prevalence of gambling problems using sample weights and controlling for sample selection. We find that 95.4% of the population has no detectable risk, 2.9% has an early risk, 0.8% has an intermediate risk, 0.7% has an advanced risk, and 0.2% can be classified as problem gamblers...

  15. Applying a Problem Based Learning Approach to Land Management Education

    DEFF Research Database (Denmark)

    Enemark, Stig

    -world context. The combination of different disciplines can be taught through a “learning-by-doing approach”. Problem solving skills can be taught through a project-oriented approach to surveying education with a focus on developing skills for “learning to learn”. The basic principles of this educational model...... engineering focus toward adopting an interdisciplinary and problem-based approach to ensure that academic programmes can cope with the wide range of land administration functions and challenges. An interdisciplinary approach to surveying education calls for the need to address issues and problems in a real...... are presented using the surveying programme at Aalborg University as an example. This paper is work in progress and draws from previous research. The paper supports the lecture on Problem Based Learning given at NUST 3 March 2016....

  16. Plane and geodetic surveying

    CERN Document Server

    Johnson, Aylmer

    2004-01-01

    Plane and Geodetic Surveying blends theory and practice, conventional techniques and GPS, to provide the ideal book for students of surveying.Detailed guidance is given on how and when the principle surveying instruments (theodolites, Total Stations, levels and GPS) should be used. Concepts and formulae needed to convert instrument readings into useful results are explained. Rigorous explanations of the theoretical aspects of surveying are given, while at the same time a wealth of useful advice about conducting a survey in practice is provided. An accompanying least squares adjustment program

  17. Problems in real analysis

    OpenAIRE

    Rǎdulescu, Teodora-Liliana T.; Andreescu, Titu; Rǎdulescu, Vicenţiu

    2015-01-01

    This book ontains a collection of challenging problems in elementary mathematical analysis, uses competition-inspired problems as a platform for training typical inventive skills, develops basic valuable techniques for solving problems in mathematical analysis on the real axis, assumes only a basic knowledge of the topic but opens the path to competitive research in the field, includes interesting and valuable historical accounts of ideas and methods in analysis, presents a connection between...

  18. Group Problem Solving

    CERN Document Server

    Laughlin, Patrick R

    2011-01-01

    Experimental research by social and cognitive psychologists has established that cooperative groups solve a wide range of problems better than individuals. Cooperative problem solving groups of scientific researchers, auditors, financial analysts, air crash investigators, and forensic art experts are increasingly important in our complex and interdependent society. This comprehensive textbook--the first of its kind in decades--presents important theories and experimental research about group problem solving. The book focuses on tasks that have demonstrably correct solutions within mathematical

  19. Creativity for Problem Solvers

    DEFF Research Database (Denmark)

    Vidal, Rene Victor Valqui

    2009-01-01

    This paper presents some modern and interdisciplinary concepts about creativity and creative processes specially related to problem solving. Central publications related to the theme are briefly reviewed. Creative tools and approaches suitable to support problem solving are also presented. Finally......, the paper outlines the author’s experiences using creative tools and approaches to: Facilitation of problem solving processes, strategy development in organisations, design of optimisation systems for large scale and complex logistic systems, and creative design of software optimisation for complex non...

  20. Survey on learning resources of knowledge and problem solving of chronic diseases prevention and treatment in community physicians of Zhejiang Province%浙江省社区医生获取慢性病防治知识途径及解决临床疑难问题方式调查

    Institute of Scientific and Technical Information of China (English)

    徐小玲; 唐新华; 严静; 俞蔚; 章一丰; 罗建勇; 刘庆敏; 杨丽

    2013-01-01

    目的 了解浙江省社区医生对慢性非传染性疾病防治知识的获取途径、需求以及解决临床疑难问题的主要方式,分析影响社区医生将知识转化为临床诊治能力的因素.方法 2011年1月至2012年12月,对参加浙江省科技厅公益性技术应用研究计划项目《高血压社区控制技术对心血管病人群防治基地建设的影响研究》基层医生培训的891名社区医生,进行有关慢性病知识的获取途径以及处理临床疑难问题的方式、目前常规培训存在的问题和影响自身能力提高的因素等内容的问卷调查.结果 回收有效问卷855份.855名社区医生中,35.2%(301/855)选择“常规培训课程”是获取慢性病防治知识的主要途径,其次是阅读专业期刊书籍(17.8%,152/855)和上级医生指导(17.2%,147/855);不同级别医院、不同职称的社区医生获取知识途径不同,组间比较差异有统计学意义(P<0.05).当社区医生在慢性病防治临床工作中遇到问题时,36.5%(23/63)的高级职称医生常用的解决问题方式为“查看教科书籍或期刊”,其次是“查看有关疾病的诊疗指南”者占31.7%(20/63);27.1% (68/251)的中级职称医生和29.4%(159/541)的初级职称医生采用的主要方式为“请教上级医生”.社区医生认为影响诊疗水平提高的原因为“工作忙无暇学习”的占30.1%(257/855),“难以得到专家的实际指导”的占28.3%(242/855),此外认为“相关指南新知识难以掌握理解”者占13.5%(115/855),“外出参加学术会议机会少”者占13.1% (112/855).社区医生认为日前常规培训存在的主要问题是“与临床实际联系不够”、“授课时间或地点安排不合理”.结论 常规培训课程是社区医生获取慢性病防治知识的主要途径,但现有的培训模式和内容等都需要改进.%Objective To survey the learning resources of knowledge and problem solving of

  1. Art as metontological problem

    Directory of Open Access Journals (Sweden)

    Radovanović Saša Ž.

    2014-01-01

    Full Text Available The author explains the link between fundamental ontology and metontology in Heidegger's thought. In this context, he raises the question about art as a metontological problem. Then he goes to show that the problem of metontology stems from imanent transformation of fundamental ontology. In this sense, two aspects of the problem of existence assume relevance, namely, universality and radicalism. He draws the conclusion that metontology and art as its problem, as opposed to fundamental ontology, were not integrated into Heidegger's later thought.

  2. Known TCP Implementation Problems

    Science.gov (United States)

    Paxson, Vern (Editor); Allman, Mark; Dawson, Scott; Fenner, William; Griner, Jim; Heavens, Ian; Lahey, K.; Semke, J.; Volz, B.

    1999-01-01

    This memo catalogs a number of known TCP implementation problems. The goal in doing so is to improve conditions in the existing Internet by enhancing the quality of current TCP/IP implementations. It is hoped that both performance and correctness issues can be resolved by making implementors aware of the problems and their solutions. In the long term, it is hoped that this will provide a reduction in unnecessary traffic on the network, the rate of connection failures due to protocol errors, and load on network servers due to time spent processing both unsuccessful connections and retransmitted data. This will help to ensure the stability of the global Internet. Each problem is defined as follows: Name of Problem The name associated with the problem. In this memo, the name is given as a subsection heading. Classification one or more problem categories for which the problem is classified: "congestion control", "performance", "reliability", "resource management". Description A definition of the problem, succinct but including necessary background material. Significance A brief summary of the sorts of environments for which the problem is significant.

  3. Numerical problems in physics

    CERN Document Server

    Singh, Devraj

    2015-01-01

    Numerical Problems in Physics, Volume 1 is intended to serve the need of the students pursuing graduate and post graduate courses in universities with Physics and Materials Science as subject including those appearing in engineering, medical, and civil services entrance examinations. KEY FEATURES: * 29 chapters on Optics, Wave & Oscillations, Electromagnetic Field Theory, Solid State Physics & Modern Physics * 540 solved numerical problems of various universities and ompetitive examinations * 523 multiple choice questions for quick and clear understanding of subject matter * 567 unsolved numerical problems for grasping concepts of the various topic in Physics * 49 Figures for understanding problems and concept

  4. Specific Pronunciation Problems.

    Science.gov (United States)

    Avery, Peter; And Others

    1987-01-01

    Reviews common pronunciation problems experienced by learners of English as a second language who are native speakers of Vietnamese, Cantonese, Spanish, Portuguese, Italian, Polish, Greek, and Punjabi. (CB)

  5. Combinatorial problems and exercises

    CERN Document Server

    Lovász, László

    2007-01-01

    The main purpose of this book is to provide help in learning existing techniques in combinatorics. The most effective way of learning such techniques is to solve exercises and problems. This book presents all the material in the form of problems and series of problems (apart from some general comments at the beginning of each chapter). In the second part, a hint is given for each exercise, which contains the main idea necessary for the solution, but allows the reader to practice the techniques by completing the proof. In the third part, a full solution is provided for each problem. This book w

  6. Developing the online survey.

    Science.gov (United States)

    Gordon, Jeffry S; McNew, Ryan

    2008-12-01

    Institutions of higher education are now using Internet-based technology tools to conduct surveys for data collection. Research shows that the type and quality of responses one receives with online surveys are comparable with what one receives in paper-based surveys. Data collection can take place on Web-based surveys, e-mail-based surveys, and personal digital assistants/Smartphone devices. Web surveys can be subscription templates, software packages installed on one's own server, or created from scratch using Web programming development tools. All of these approaches have their advantages and disadvantages. The survey owner must make informed decisions as to the right technology to implement. The correct choice can save hours of work in sorting, organizing, and analyzing data.

  7. OCCUPATIONAL HEALTH PROBLEMS OF HAIRDRESSERS OF TEHRAN

    Directory of Open Access Journals (Sweden)

    Nassiri

    1996-06-01

    Full Text Available A randomized cross sectional epidemiologic study about the occupational health problems of hairdressers was conducted in Tehran in 1988. The sample selected for survey consisted of 200 women and 398 men- Study findings indicated that the working hours were often irregular and overtime. Evaluation of working conditions showed that the female hairdressers were more exposed to noise than male. the prevalence of the varicose veins and osteoarthritis are higher than the skin ami respiratory diseases.

  8. The Novice Problem in Computer Science

    OpenAIRE

    Ásrún Matthíasdóttir 1956; Hrafn J. Geirsson 1989

    2011-01-01

    High dropout rate in first year programming courses is a problem in many universities but the reasons for dropout can be different for different students. Students in first year programming courses may have different backgrounds that can influence what teaching methods are most relevant and the level and rate of the teaching. This paper describes students' attitude towards teaching and learning material in a first year programming course at Reykjavik University in Iceland. In the survey descr...

  9. Vaal River catchment: problems and research needs

    CSIR Research Space (South Africa)

    Braune, E

    1987-01-01

    Full Text Available disappearance of chlorinated pesticides from the environment. Such surveys should be followed up in potential problem tributaries with intensive agricultural activity like the Harts River. Conservation and recreation Conservation Demands on the Vaal system... Spitskop Dam. 3.2.4 Rainfall stimulation The potential for rainfall and runoff enhancement through weather modification is being intensively investigated by the Weather Bureau of the Department of Environment Affairs in cooperation with the Department...

  10. Survey Harmonisation with New Technologies Improvement (SHANTI)

    DEFF Research Database (Denmark)

    Kagerbauer, Martin

    not miss the opportunities of an advancement by means of new information and communication technologies. The purpose of this Action was to coordinate research efforts on data harmonization for transport surveys across Europe. Guidelines for harmonizing surveys are not only a statistical problem, because...... different approaches and data qualities exist. The data needs from the transport sector allow the assessment of past policies, in terms of efficiency and equity. They allow the elaboration of new policies measures at European level (e.g. to reduce the emissions due to transport). Mobile communication...... and positioning technologies including GPS/GALILEO, GSM and Radio Data System (RDS) have advanced rapidly and their costs are decreasing. They demonstrate great potential as survey instruments for tracking individual mobility and travel behaviour as well as freight movements, by enabling to conduct surveys along...

  11. Gambling, gambling activities, and problem gambling.

    Science.gov (United States)

    Holtgraves, Thomas

    2009-06-01

    This research examined similarities and differences between gambling activities, with a particular focus on differences in gambling frequency and rates of problem gambling. The data were from population-based surveys conducted in Canada between 2001 and 2005. Adult respondents completed various versions of the Canadian Problem Gambling Index (CPGI), including the Problem Gambling Severity Index (PGSI). A factor analysis of the frequency with which different gambling activities were played documented the existence of two clear underlying factors. One factor was comprised of Internet gambling and betting on sports and horse races, and the other factor was comprised of lotteries, raffles, slots/Video Lottery Terminals (VLTs), and bingo. Factor one respondents were largely men; factor two respondents were more likely to be women and scored significantly lower on a measure of problem gambling. Additional analyses indicated that (1) frequency of play was significantly and positively related to problem gambling scores for all activities except raffles, (2) the relationship between problem gambling scores and frequency of play was particularly pronounced for slots/VLTs, (3) problem gambling scores were associated with playing a larger number of games, and (4) Internet and sports gambling had the highest conversion rates (proportion who have tried an activity who frequently play that activity).

  12. Designing, Testing, and Validating an Attitudinal Survey on an Environmental Topic: A Groundwater Pollution Survey Instrument for Secondary School Students

    Science.gov (United States)

    Lacosta-Gabari, Idoya; Fernandez-Manzanal, Rosario; Sanchez-Gonzalez, Dolores

    2009-01-01

    Research in environmental attitudes' assessment has significantly increased in recent years. The development of specific attitude scales for specific environmental problems has often been proposed. This paper describes the Groundwater Pollution Test (GPT), a 19-item survey instrument using a Likert-type scale. The survey has been used with…

  13. Designing, Testing, and Validating an Attitudinal Survey on an Environmental Topic: A Groundwater Pollution Survey Instrument for Secondary School Students

    Science.gov (United States)

    Lacosta-Gabari, Idoya; Fernandez-Manzanal, Rosario; Sanchez-Gonzalez, Dolores

    2009-01-01

    Research in environmental attitudes' assessment has significantly increased in recent years. The development of specific attitude scales for specific environmental problems has often been proposed. This paper describes the Groundwater Pollution Test (GPT), a 19-item survey instrument using a Likert-type scale. The survey has been used with…

  14. PROBLEMS OF TURKISH LEXICOGRAPHY.

    Science.gov (United States)

    TIETZE, ANDREAS

    THE LEXICOGRAPHICAL PROBLEMS IN THE TURKISH LANGUAGE WERE DISCUSSED. HISTORICAL REVIEW OF THE LANGUAGE WAS PRESENTED WITH PROBLEMS OF LEXICOGRAPHY THAT EXISTED IN THE PAST COMPARED WITH THOSE OF THE PRESENT. DISCUSSION TOPICS OF THE REPORT INCLUDED (1) NAME OF THE LANGUAGE, (2) DELIMITATION COMPARED WITH RELATED LANGUAGES, (3) DELIMINATION…

  15. A Stochastic Employment Problem

    Science.gov (United States)

    Wu, Teng

    2013-01-01

    The Stochastic Employment Problem(SEP) is a variation of the Stochastic Assignment Problem which analyzes the scenario that one assigns balls into boxes. Balls arrive sequentially with each one having a binary vector X = (X[subscript 1], X[subscript 2],...,X[subscript n]) attached, with the interpretation being that if X[subscript i] = 1 the ball…

  16. Problems in baryon spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Capstick, S. [Florida State Univ., Tallahassee, FL (United States)

    1994-04-01

    Current issues and problems in the physics of ground- and excited-state baryons are considered, and are classified into those which should be resolved by CEBAF in its present form, and those which may require CEBAF to undergo an energy upgrade to 8 GeV or more. Recent theoretical developments designed to address these problems are outlined.

  17. Problem Solving Techniques Seminar.

    Science.gov (United States)

    Massachusetts Career Development Inst., Springfield.

    This booklet is one of six texts from a workplace literacy curriculum designed to assist learners in facing the increased demands of the workplace. Six problem-solving techniques are developed in the booklet to assist individuals and groups in making better decisions: problem identification, data gathering, data analysis, solution analysis,…

  18. Simon on problem solving

    DEFF Research Database (Denmark)

    Foss, Kirsten; Foss, Nicolai Juul

    2006-01-01

    as a general approach to problem solving. We apply these Simonian ideas to organisational issues, specifically new organisational forms. Specifically, Simonian ideas allow us to develop a morphology of new organisational forms and to point to some design problems that characterise these forms....

  19. The Problem Revisited

    DEFF Research Database (Denmark)

    Ovesen, Nis

    2015-01-01

    Problem-based learning (PBL) is becoming increasingly popular in design educations, but how is it taught and practiced? This paper presents a case study of a three-day workshop that has the purpose of introducing PBL to design students. A theoretical background on PBL and problems in design is es...

  20. Dynamical inverse problems

    CERN Document Server

    Gladwell, Graham ML

    2011-01-01

    The papers in this volume present an overview of the general aspects and practical applications of dynamic inverse methods, through the interaction of several topics, ranging from classical and advanced inverse problems in vibration, isospectral systems, dynamic methods for structural identification, active vibration control and damage detection, imaging shear stiffness in biological tissues, wave propagation, to computational and experimental aspects relevant for engineering problems.

  1. The Problem of Meaning.

    Science.gov (United States)

    Barrell, Arthur Rex

    1970-01-01

    The study of semantics, the study of meaning, promises more complete communicative thought transfer if several problem areas can be solved or at least generally agreed upon. The problem of exact definition of words arises from the fact that no one work is the exact equivalent of another. However, the study of many languages forces the mind to…

  2. CHRONIC PROBLEM FAMILIES.

    Science.gov (United States)

    STONE, EDWARD

    THE REPORT POINTS OUT THAT, IN GENERAL, CHRONIC PROBLEM PARENTS GREW UP IN ENVIRONMENTS OF EMOTIONAL IMPOVERISHMENT, INCONSISTENCY, CONFUSION, AND DISORDER, OFTEN WITH DEPRIVATION OF FOOD, CLOTHING, AND SHELTER. THESE PARENTS CATEGORIZE PEOPLE AS THOSE WHO GIVE AND THOSE WHO TAKE. THEY BLAME THEIR PROBLEMS ON EXTERNAL CIRCUMSTANCES NOT UNDER THEIR…

  3. Wicked Problems: Inescapable Wickedity

    Science.gov (United States)

    Jordan, Michelle E.; Kleinsasser, Robert C.; Roe, Mary F.

    2014-01-01

    The article explores the concept of wicked problems and proposes a reinvigorated application of this concept for wider educational use. This recommendation stems from the contributions of a number of scholars who frame some of the most contentious and recalcitrant educational issues as wicked problems. The present authors build upon these previous…

  4. Hip Problems in Infants

    Science.gov (United States)

    ... hip problems later in life? ResourcesScreening for Developmental Dysplasia of the Hip by LM French, M.D., and FR Dietz, ... 2014 Categories: Family Health, Infants and ToddlersTags: dislocation, dysplasia, external, femoral, hip, infants, internal, problems, socket, torsion Family Health, Infants ...

  5. Problems in quantum mechanics

    CERN Document Server

    Goldman, Iosif Ilich; Geilikman, B T

    2006-01-01

    This challenging book contains a comprehensive collection of problems in nonrelativistic quantum mechanics of varying degrees of difficulty. It features answers and completely worked-out solutions to each problem. Geared toward advanced undergraduates and graduate students, it provides an ideal adjunct to any textbook in quantum mechanics.

  6. Reconfigurable layout problem

    NARCIS (Netherlands)

    Meng, G.; Heragu, S.S.; Zijm, H.

    2004-01-01

    This paper addresses the reconfigurable layout problem, which differs from traditional, robust and dynamic layout problems mainly in two aspects: first, it assumes that production data are available only for the current and upcoming production period. Second, it considers queuing performance measure

  7. Reconfigurable layout problem

    NARCIS (Netherlands)

    Meng, G.; Heragu, S.S.; Heragu, S.S.; Zijm, Willem H.M.

    2004-01-01

    This paper addresses the reconfigurable layout problem, which differs from traditional, robust and dynamic layout problems mainly in two aspects: first, it assumes that production data are available only for the current and upcoming production period. Second, it considers queuing performance measure

  8. Current Social Problem Novels.

    Science.gov (United States)

    Kenney, Donald J.

    This review of social problem novels for young adults opens with a brief background of the genre, then lists the dominant themes of social problem fiction and nonfiction novels that have been published in the last two years, such as alcoholism, alienation, death, growing up and self-awarness, drugs, and divorce. Other themes mentioned are…

  9. Student-Posed Problems

    Science.gov (United States)

    Harper, Kathleen A.; Etkina, Eugenia

    2002-10-01

    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).

  10. Problems in equilibrium theory

    CERN Document Server

    Aliprantis, Charalambos D

    1996-01-01

    In studying General Equilibrium Theory the student must master first the theory and then apply it to solve problems. At the graduate level there is no book devoted exclusively to teaching problem solving. This book teaches for the first time the basic methods of proof and problem solving in General Equilibrium Theory. The problems cover the entire spectrum of difficulty; some are routine, some require a good grasp of the material involved, and some are exceptionally challenging. The book presents complete solutions to two hundred problems. In searching for the basic required techniques, the student will find a wealth of new material incorporated into the solutions. The student is challenged to produce solutions which are different from the ones presented in the book.

  11. The road coloring problem

    CERN Document Server

    Trahtman, A N

    2007-01-01

    The synchronizing word of deterministic automaton is a word in the alphabet of colors (considered as letters) of its edges that maps the automaton to a single state. A coloring of edges of a directed graph is synchronizing if the coloring turns the graph into deterministic finite automaton possessing a synchronizing word. The road coloring problem is a problem of synchronizing coloring of directed finite strongly connected graph with constant outdegree of all its vertices if the greatest common divisor of lengths of all its cycles is one. The problem was posed by Adler, Goodwyn and Weiss over 30 years ago and evoked a noticeable interest among the specialists in theory of graphs, deterministic automata and symbolic dynamics. The problem is described even in "Vikipedia" - the popular Internet Encyclopedia. The positive solution of the road coloring problem is presented.

  12. The Guderley problem revisited

    Energy Technology Data Exchange (ETDEWEB)

    Ramsey, Scott D [Los Alamos National Laboratory; Kamm, James R [Los Alamos National Laboratory; Bolstad, John H [NON LANL

    2009-01-01

    The self-similar converging-diverging shock wave problem introduced by Guderley in 1942 has been the source of numerous investigations since its publication. In this paper, we review the simplifications and group invariance properties that lead to a self-similar formulation of this problem from the compressible flow equations for a polytropic gas. The complete solution to the self-similar problem reduces to two coupled nonlinear eigenvalue problems: the eigenvalue of the first is the so-called similarity exponent for the converging flow, and that of the second is a trajectory multiplier for the diverging regime. We provide a clear exposition concerning the reflected shock configuration. Additionally, we introduce a new approximation for the similarity exponent, which we compare with other estimates and numerically computed values. Lastly, we use the Guderley problem as the basis of a quantitative verification analysis of a cell-centered, finite volume, Eulerian compressible flow algorithm.

  13. Simplifying Complex Problems

    Directory of Open Access Journals (Sweden)

    Dan Ophir

    2011-12-01

    Full Text Available The process of making complex and controversial decisions, that is, dealing with moral or ethical dilemmas, have intrigued people and inspired writers from time immemorial. Dilemmas give both color and depth to characters in good literary works. But beyond literary fiction, dilemmas occupy society in every day issues such as in introducing legislation or solving current political problems. One example of a current political dilemma is how to deal with Iran’s quest for nuclear weapons. If it were possible to assess and quantify each of the alternative solutions for a given problem, the process of decision making would be much easier. If a problem involves only two optional solutions, game theory techniques can be used. However, real life problems are usually multi-unit, multi-optional problems, as in Iran

  14. Problems in abstract algebra

    CERN Document Server

    Wadsworth, A R

    2017-01-01

    This is a book of problems in abstract algebra for strong undergraduates or beginning graduate students. It can be used as a supplement to a course or for self-study. The book provides more variety and more challenging problems than are found in most algebra textbooks. It is intended for students wanting to enrich their learning of mathematics by tackling problems that take some thought and effort to solve. The book contains problems on groups (including the Sylow Theorems, solvable groups, presentation of groups by generators and relations, and structure and duality for finite abelian groups); rings (including basic ideal theory and factorization in integral domains and Gauss's Theorem); linear algebra (emphasizing linear transformations, including canonical forms); and fields (including Galois theory). Hints to many problems are also included.

  15. Two-Manifold Problems

    CERN Document Server

    Boots, Byron

    2011-01-01

    Recently, there has been much interest in spectral approaches to learning manifolds---so-called kernel eigenmap methods. These methods have had some successes, but their applicability is limited because they are not robust to noise. To address this limitation, we look at two-manifold problems, in which we simultaneously reconstruct two related manifolds, each representing a different view of the same data. By solving these interconnected learning problems together and allowing information to flow between them, two-manifold algorithms are able to succeed where a non-integrated approach would fail: each view allows us to suppress noise in the other, reducing bias in the same way that an instrumental variable allows us to remove bias in a {linear} dimensionality reduction problem. We propose a class of algorithms for two-manifold problems, based on spectral decomposition of cross-covariance operators in Hilbert space. Finally, we discuss situations where two-manifold problems are useful, and demonstrate that sol...

  16. The interval ordering problem

    CERN Document Server

    Dürr, Christoph; Spieksma, Frits C R; Nobibon, Fabrice Talla; Woeginger, Gerhard J

    2011-01-01

    For a given set of intervals on the real line, we consider the problem of ordering the intervals with the goal of minimizing an objective function that depends on the exposed interval pieces (that is, the pieces that are not covered by earlier intervals in the ordering). This problem is motivated by an application in molecular biology that concerns the determination of the structure of the backbone of a protein. We present polynomial-time algorithms for several natural special cases of the problem that cover the situation where the interval boundaries are agreeably ordered and the situation where the interval set is laminar. Also the bottleneck variant of the problem is shown to be solvable in polynomial time. Finally we prove that the general problem is NP-hard, and that the existence of a constant-factor-approximation algorithm is unlikely.

  17. Structural Identification Problem

    Directory of Open Access Journals (Sweden)

    Suvorov Aleksei

    2016-01-01

    Full Text Available The identification problem of the existing structures though the Quasi-Newton and its modification, Trust region algorithms is discussed. For the structural problems, which could be represented by means of the mathematical modelling of the finite element code discussed method is extremely useful. The nonlinear minimization problem of the L2 norm for the structures with linear elastic behaviour is solved by using of the Optimization Toolbox of Matlab. The direct and inverse procedures for the composition of the desired function to minimize are illustrated for the spatial 3D truss structure as well as for the problem of plane finite elements. The truss identification problem is solved with 2 and 3 unknown parameters in order to compare the computational efforts and for the graphical purposes. The particular commands of the Matlab codes are present in this paper.

  18. The Interaction Programming Problem

    Institute of Scientific and Technical Information of China (English)

    LI Rong-sheng; CHENG Ying

    2001-01-01

    Based upon the research to the economic equilibrium problems, we present a kind of new mathematical programming problem-interaction programming problem (abbreviated by IPP). The IPP is composed of two or multiple parametric programming problems which is interrelated with each other. The IPP reflects the equality and mutual benefit relationship between two (or among multiple) economic planners in an economic system. In essence, the IPP is similar to the generalized Nash equilibria (GNE) game which has been given several names in the literature: social equilibria games, pseudo-Nash equilibria games, and equilibrium programming problems. In this paper, we establish the mathematical model and some basic concepts to the IPP. We investigate the structure and the properties of the IPP. We also give a necessary and sufficient conditions for the existence of the equilibrium points to a kind of linear IPP.

  19. Problem Solving and Learning

    CERN Document Server

    Singh, Chandralekha

    2016-01-01

    One finding of cognitive research is that people do not automatically acquire usable knowledge by spending lots of time on task. Because students' knowledge hierarchy is more fragmented, "knowledge chunks" are smaller than those of experts. The limited capacity of short term memory makes the cognitive load high during problem solving tasks, leaving few cognitive resources available for metacognition. The abstract nature of the laws of physics and the chain of reasoning required to draw meaningful inferences makes these issues critical. In order to help students, it is crucial to consider the difficulty of a problem from the perspective of students. We are developing and evaluating interactive problem-solving tutorials to help students in the introductory physics courses learn effective problem-solving strategies while solidifying physics concepts. The self-paced tutorials can provide guidance and support for a variety of problem solving techniques, and opportunity for knowledge and skill acquisition.

  20. Alcohol use, alcohol problems, and problem behavior engagement among students at two schools in northern Mexico.

    Science.gov (United States)

    Mancha, Brent E; Rojas, Vanessa C; Latimer, William W

    2012-11-01

    This study examined the association between alcohol-use problem severity, defined by number of DSM-IV alcohol Abuse and Dependence symptoms and frequency of alcohol use, and problem behavior engagement among Mexican students. A confidential survey was administered to 1229 students in grades 7-12 at two schools in a northern border city in Mexico. Youths were categorized into five groups based on their alcohol use frequency and symptoms of DSM-IV alcohol Abuse and Dependence, specifically: no lifetime alcohol use, lifetime alcohol use but none in the past year, past year alcohol use, one or two alcohol Abuse or Dependence symptoms, and three or more alcohol Abuse or Dependence symptoms. The association between five levels of alcohol-use problem severity and three problem behaviors, lifetime marijuana use, lifetime sexual intercourse, and past year arrest/law trouble, was examined using chi-square or Fisher's exact tests. Several alcohol-use problem severity categories were significantly different with respect to rates of lifetime marijuana use, lifetime sexual intercourse, and past year arrest/law trouble. Higher alcohol-use problem severity was associated with greater endorsement of problem behaviors. Knowing about variations in adolescent alcohol use and alcohol problems may be instrumental in determining if youths are also engaging in a range of other risk behaviors. Considering varying levels of alcohol use and alcohol problems is important for effective targeted prevention and treatment interventions.