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Sample records for case method

  1. The reflexive case study method

    DEFF Research Database (Denmark)

    Rittenhofer, Iris

    2015-01-01

    This paper extends the international business research on small to medium-sized enterprises (SME) at the nexus of globalization. Based on a conceptual synthesis across disciplines and theoretical perspectives, it offers management research a reflexive method for case study research of postnational...

  2. Case studies: Soil mapping using multiple methods

    Science.gov (United States)

    Petersen, Hauke; Wunderlich, Tina; Hagrey, Said A. Al; Rabbel, Wolfgang; Stümpel, Harald

    2010-05-01

    Soil is a non-renewable resource with fundamental functions like filtering (e.g. water), storing (e.g. carbon), transforming (e.g. nutrients) and buffering (e.g. contamination). Degradation of soils is meanwhile not only to scientists a well known fact, also decision makers in politics have accepted this as a serious problem for several environmental aspects. National and international authorities have already worked out preservation and restoration strategies for soil degradation, though it is still work of active research how to put these strategies into real practice. But common to all strategies the description of soil state and dynamics is required as a base step. This includes collecting information from soils with methods ranging from direct soil sampling to remote applications. In an intermediate scale mobile geophysical methods are applied with the advantage of fast working progress but disadvantage of site specific calibration and interpretation issues. In the framework of the iSOIL project we present here some case studies for soil mapping performed using multiple geophysical methods. We will present examples of combined field measurements with EMI-, GPR-, magnetic and gammaspectrometric techniques carried out with the mobile multi-sensor-system of Kiel University (GER). Depending on soil type and actual environmental conditions, different methods show a different quality of information. With application of diverse methods we want to figure out, which methods or combination of methods will give the most reliable information concerning soil state and properties. To investigate the influence of varying material we performed mapping campaigns on field sites with sandy, loamy and loessy soils. Classification of measured or derived attributes show not only the lateral variability but also gives hints to a variation in the vertical distribution of soil material. For all soils of course soil water content can be a critical factor concerning a succesful

  3. A Mixed Methods Sampling Methodology for a Multisite Case Study

    Science.gov (United States)

    Sharp, Julia L.; Mobley, Catherine; Hammond, Cathy; Withington, Cairen; Drew, Sam; Stringfield, Sam; Stipanovic, Natalie

    2012-01-01

    The flexibility of mixed methods research strategies makes such approaches especially suitable for multisite case studies. Yet the utilization of mixed methods to select sites for these studies is rarely reported. The authors describe their pragmatic mixed methods approach to select a sample for their multisite mixed methods case study of a…

  4. Evolution of OO Methods: the unified case

    Directory of Open Access Journals (Sweden)

    Matti Rossi

    1997-05-01

    Full Text Available This paper takes an evaluative look into OO methods and especially the evolution of the new snified method from its ancestors, OMT and OODA. The paper ries to classify the components of the earlier ethods and identify the parts that have been taken into the Unified ethod. The research applies the method metrics approach. For the sake of compactness we limit ourselves to the class diagram technique of all methods. We make observations about the number of concepts in each variation and show how the metrics can be used to analyse the changes in the techniques.

  5. Environmental reference materials methods and case studies

    DEFF Research Database (Denmark)

    Schramm-Nielsen, Karina Edith

    1998-01-01

    be modelled when the length of the study is unknown. Experimental data has been collected from two stability studies of aqueous matrices. The first study regards the stability of TN NO² + ³-N and n in autoclaved wastewater samples over a period of 22 months. Data was collected specifically for this study....... The methods have been evaluated with regard to their robustness towards variations in the chemical analytical method and with regard to the number of times a significant out of control situation is indicated. The second study regards the stability of NH4-N and total phosphorous in autoclaved seawater samples...

  6. Case Method in the Teaching of Food Safety

    Science.gov (United States)

    Gallego, Alfredo; Fortunato, Maria S.; Rossi, Susana L.; Korol, Sonia E.; Moretton, Juan A.

    2013-01-01

    One of the fundamental aims of education is the integration of theory and practice. The case method is a teaching strategy in which students must apply their knowledge to solve real-life situations. They have to analyze the case described and propose the best possible solution. Although the case may be written, the use of new information and…

  7. Using the Case Study Method in Teaching College Physics

    Science.gov (United States)

    Burko, Lior M.

    2016-01-01

    The case study teaching method has a long history (starting at least with Socrates) and wide current use in business schools, medical schools, law schools, and a variety of other disciplines. However, relatively little use is made of it in the physical sciences, specifically in physics or astronomy. The case study method should be considered by…

  8. The Effect of the Case Method on Tolerance for Ambiguity.

    Science.gov (United States)

    Banning, Kevin C.

    2003-01-01

    Of students in capstone strategic management classes, 195 (experimental group) were instructed using the case method. Compared with results from 42 controls on a tolerance for ambiguity scale, the case method not only conveyed core concepts but also increased tolerance. Locus of control had an effect on learning to tolerate ambiguity. (Contains 21…

  9. Single-Case Designs and Qualitative Methods: Applying a Mixed Methods Research Perspective

    Science.gov (United States)

    Hitchcock, John H.; Nastasi, Bonnie K.; Summerville, Meredith

    2010-01-01

    The purpose of this conceptual paper is to describe a design that mixes single-case (sometimes referred to as single-subject) and qualitative methods, hereafter referred to as a single-case mixed methods design (SCD-MM). Minimal attention has been given to the topic of applying qualitative methods to SCD work in the literature. These two…

  10. Case Retrieval Method of Multi-parameter for Customized Product

    Institute of Scientific and Technical Information of China (English)

    DING Junjian; TAN Shili; SONG Xiaofeng; WANG Meiting

    2006-01-01

    The CBR(Case-Based Reasoning) usually is been used to accomplish customized products by variant design or reusable design. In the CBR, retrieve is very important. A simple case retrieval method is been brought forward to retrieve a optimal prototype based on using inputted multi-parameters, it can be programmed easily. An example has been proved this method can find optimal prototype for new design task efficiently.

  11. Using the case-study method in teaching college physics

    CERN Document Server

    Burko, Lior M

    2016-01-01

    The case-study teaching method has a long history (starting at least with Socrates), and wide current use in business schools, medical schools, law schools, and a variety of other disciplines. However, relatively little use is made of it in the physical sciences, specifically in physics or astronomy. The case-study method should be considered by physics faculty as part of the effort to transition the teaching of college physics from the traditional frontal-lecture format to other formats that enhance active student participation. In this paper we endeavor to interest physics instructors in the case-study method, and hope that it would also serve as a call for more instructors to produce cases that they use in their own classes and that can also be adopted by other instructors.

  12. Using the Case Study Method in Teaching College Physics

    Science.gov (United States)

    Burko, Lior M.

    2016-10-01

    The case study teaching method has a long history (starting at least with Socrates) and wide current use in business schools, medical schools, law schools, and a variety of other disciplines. However, relatively little use is made of it in the physical sciences, specifically in physics or astronomy. The case study method should be considered by physics faculty as part of the effort to transition the teaching of college physics from the traditional frontal-lecture format to other formats that enhance active student participation. In this paper we endeavor to interest physics instructors in the case study method, and hope that it would also serve as a call for more instructors to produce cases that they use in their own classes and that can also be adopted by other instructors.

  13. Three Strategies for Teaching Research Methods: A Case Study

    Science.gov (United States)

    Pfeffer, Carla A.; Rogalin, Christabel L.

    2012-01-01

    The authors provide a brief case study of a three-strategy approach for teaching undergraduate research methods that (1) incorporates active learning assignments and discussion-based learning, (2) integrates a cross-discipline and cross-method faculty guest discussion facilitators series, and (3) focuses on the challenges and rewards of conducting…

  14. A Guideline of Using Case Method in Software Engineering Courses

    Science.gov (United States)

    Zainal, Dzulaiha Aryanee Putri; Razali, Rozilawati; Shukur, Zarina

    2014-01-01

    Software Engineering (SE) education has been reported to fall short in producing high quality software engineers. In seeking alternative solutions, Case Method (CM) is regarded as having potential to solve the issue. CM is a teaching and learning (T&L) method that has been found to be effective in Social Science education. In principle,…

  15. Case Study Method in Business Education in the USA

    Directory of Open Access Journals (Sweden)

    Velushchak Maryna

    2014-12-01

    Full Text Available Business Education is dynamic in nature and needs diverse information to deal with different business problems. To understand the peculiar situations and to manage them effectively, case studies are widely used. Researchers in education have already demonstrated that students' active participation in the educational process increases their learning outcomes. Methods of small group activities, case studies and cooperative student projects give the opportunity to participate actively in the learning process by talking, reading, writing and reflecting. Case-based learning is an essential part of business education as it enables students to discover and develop their unique framework for dealing with business problems. The important peculiarity of the business case study is that it introduces a slice of realism into the learning experience. The case study method helps the students in developing wisdom and gives lot of scope for knowledge application. Nowadays, business education should be much more practically oriented and has to consider the main features of a modern competitive global economy. Lectures and discussions are not any more the most effective teaching methods. As research results show, the case method is the most effective teaching technique of future career preparations and practical application skills in today's business environment as it enables students examining different business situations in various cultural and economic perspectives, opening up their minds by solving the problems of the real business situations.

  16. CASE METHOD. ACTIVE LEARNING METHODOLOGY TO ACQUIRE SIGNIFICANT IN CHEMISTRY

    Directory of Open Access Journals (Sweden)

    Clotilde Pizarro

    2015-09-01

    Full Text Available In this paper the methodology of cases in first year students of the Engineering Risk Prevention and Environment is applied. For this purpose a real case of contamination occurred at a school in the region of Valparaiso called "La Greda" is presented. If the application starts delivering an extract of the information collected from the media and they made a brief induction on the methodology to be applied. A plenary session, which is debate about possible solutions to the problem and establishing a relationship between the case and drives the chemistry program is then performed. Is concluded that the application of the case method, was a fruitful tool in yields obtained by students, since the percentage of approval was 75%, which is considerably higher than previous years.

  17. 3D scan to product design: Methods, techniques, and cases

    NARCIS (Netherlands)

    Lee, W.; Lee, B.; Kim, S.; Jung, H.; Jeon, E.; Choi, T.; You, H.

    2015-01-01

    3D scanning technology has derived great opportunities for ergonomic product designs. This paper is aimed to introduce various research cases and methods based on 3D scanning have conducted by an ergonomics laboratory in South Korea. Sizing systems and representative 3D models developed on anthropom

  18. Making the Case Method Work in Teaching Business English: A Case Study

    Science.gov (United States)

    Esteban, Ana Almagro; Canado, Maria Luisa Perez

    2004-01-01

    The objective of this paper is to show how some drawbacks inherent in the use of the Case Method in teaching Business English can be surmounted, especially when students are non-native speakers of English and the teacher of ESP is not experienced in this method. The first part of the paper presents a brief account of the general features,…

  19. Adapted Bland-Altman method was used to compare measurement methods with unequal observations per case

    NARCIS (Netherlands)

    Hofman, C.S.; Melis, R.J.F.; Donders, A.R.

    2015-01-01

    OBJECTIVES: To describe an adjustment of the Bland-Altman approach to evaluate possible patterns of discord between two measurement methods with an unequal number of observations per case. STUDY DESIGN AND SETTING: Two methods of adaptation were compared using self-assessed general well-being scores

  20. Management of a case of lagophthalmos by Gillies′ method (a case report.

    Directory of Open Access Journals (Sweden)

    Mukherjee R

    1990-04-01

    Full Text Available A case of facial palsy with lagophthalmos with exposure keratitis was corrected surgically by a method of temporalis transfer. When the slings were tightened leaving 1 cm gap in the palpebral aperture, lagophthalmos persisted. A secondary tightening procedure causing overlap of the upper lid over the lower yielded good results.

  1. The Case Method: "I’m not sure ..." Faci ng Barriers to Implementi ng the Method

    Directory of Open Access Journals (Sweden)

    Roberta Dias Campos

    2014-03-01

    extension courses for teachers. It presents the dilemma experienced by Cosmo, a young professor recently hired by the iesg (Institute of Higher Education in Management, who wishes to adopt the case method as a teaching practice within an institutional setting and with distinct and heterogeneous didactic experiences. It also presents the views of different stakeholders in the institution, discussing the challenge to accommodate its teaching strategy with its professionals’ individual and cultural daily practice. The case intends to foster reflection on the barriers and actions required for institutional case method adoption, seen from three of the organization’s levels: the faculty, the student body and the institutional structure as a whole.

  2. Robust method optimization strategy-a useful tool for method transfer: the case of SFC.

    Science.gov (United States)

    Dispas, Amandine; Lebrun, Pierre; Andri, Bertyl; Rozet, Eric; Hubert, Philippe

    2014-01-01

    The concept of Quality by Design (QbD) is now well established in pharmaceutical industry and should be applied to the development of any analytical methods. In this context, the key concept of Design Space (DS) was introduced in the field of analytical method optimization. In chromatographic words, the DS is the space of chromatographic conditions that will ensure the quality of peaks separation, thus DS is a zone of robustness. In the present study, the interest of robust method optimization strategy was investigated in the context of direct method transfer from sending to receiving laboratory. The benefit of this approach is to speed up the method life cycle by performing only one quantitative validation step in the final environment of method use. A Supercritical Fluid Chromatography (SFC) method previously developed was used as a case study in this work. Moreover, the interest of geometric transfer was investigated simultaneously in order to stress a little bit more the transfer exercise and, by the way, emphasize the additional benefit of DS strategy in this particular context. Three successful transfers were performed on two column geometries. In order to compare original and transferred methods, the observed relative retention times (RT) were modelled as a function of the predicted relative RT and of the method type (original or transferred). The observed relative RT of the original and transferred methods are not statistically different and thus the method transfer is successfully achieved thanks to the robust optimization strategy. Furthermore, the analytical method was improved considering analysis time (reduced five times) and peak capacity (increased three times). To conclude, the advantage of using a DS strategy implemented for the optimization and transfer of SFC method was successfully demonstrated in this work.

  3. Complicated distal femoral epiphyseolysis treated by Ilizarov method: Case report

    Directory of Open Access Journals (Sweden)

    Jovanović Vesna

    2010-01-01

    Full Text Available Introduction Injuries of the distal femur are rare in children; however, they are frequently associated with complications. They are almost always physeal, most frequently Salter-Harris type II epiphyseolysis. The treatment of such injuries is similar in all physeal injuries. It is intended to provide growth plate recovery by gentle reduction and stable fixation thus preventing secondary complications, and also to provide decompression of the segment to solve the compartment syndrome and recover the neurovascular structures. Case Outline A seven-year old boy presented with a right knee injury while sleigh riding. He was admitted three weeks following the injury with distal femoral epiphysiolysis associated with peroneal palsy. A day after admission to our Institute the reduction was performed using the Ilizarov device. Physical therapy was started immediately after surgery, as well as walking with weight bearing on the operated leg. Five months after surgery the patient was anatomically and functionally recovered. Conclusion The presented method is recommended in the treatment of such injuries because of several reasons; reposition is simple and complete, there is no need to open the fracture site, fixation is stable, the growth plate is preserved, there is no need for additional external immobilisation, and physical therapy involving walking with weight bearing on the operated leg may be started immediately after surgery. .

  4. A Business Case Method for IT Investments in Danish Municipalities

    DEFF Research Database (Denmark)

    2012-01-01

    Effective management of information technology (IT) investments is increasingly important for Danish municipalities. This is why they along with other both public and private sector organizations increasingly are using IT business cases. The business case is a document specifying the main rationale...... behind the expected value and cost of an IT investment for the adopting organization. However, experiences from Danish municipalities reveal difficulties in developing effective IT business cases for purposes beyond simple cost savings. Based on collaborative action research with Danish municipalities...

  5. A Novel Method in Food Safety Management by Using Case Base Reasoning Method

    Directory of Open Access Journals (Sweden)

    S. Saqaeeyan

    2015-09-01

    Full Text Available Today’s Food Industry has responsibility to provide most consuming food for people. These foods are consumed by large area of society. So they are important source of causes of diseases and food poisoning. Monitoring system have been created to control these diseases and they are used in duration of production step of food supply chain. Hazard Assurance Critical Control Point (HACCP is regarded as best method in safety system. Necessity to create integrated HACCP system forced factories to use intelligent methods to build HACCP for every production. This paper proposes Case-Based Reasoning (CBR technique and use of paired comparisons tables and similarity equations to create HACCP for food system of Sabz Nam Company. Our system is an intelligent system has based on RFID and it works as consulter by generating five proper safety suggestion to food expert. Finally we assess accuracy and efficiency of proposed system on real data of Sabz Nam Company.

  6. Complexity, Representation and Practice: Case Study as Method and Methodology

    Science.gov (United States)

    Miles, Rebecca

    2015-01-01

    While case study is considered a common approach to examining specific and particular examples in research disciplines such as law, medicine and psychology, in the social sciences case study is often treated as a lesser, flawed or undemanding methodology which is less valid, reliable or theoretically rigorous than other methodologies. Building on…

  7. Using Case Studies in the Social Sciences : Methods, inferences, purposes

    NARCIS (Netherlands)

    A. Ruzzene (Attilia)

    2014-01-01

    markdownabstract__Abstract__ Despite fads and fashions in the academic culture, case-based reasoning has proved to be a persistent form of analysis in the social sciences, in the humanities, and even in moral thinking. Broadly understood, case-based reasoning locates the ultimate source of our epis

  8. Case fatality rates of different suicide methods within Ilam province of Iran

    OpenAIRE

    2012-01-01

    Background: There are few diverse studies that have reported the case fatality rates of different methods of suicide, none of them are originated from developing countries. The aim of the present article is to report the case fatality rates of different methods of suicide in Ilam province of Iran. Materials and Methods: Data on 611 cases of suicide and 1807 cases of deliberate self harm (DSH) that were recorded in a comprehensive registry during 1995 through 2002 were analyzed for both gender...

  9. Tunneling method for Hawking radiation in the Nariai case

    CERN Document Server

    Belgiorno, F; Piazza, F Dalla

    2016-01-01

    Particle creation associated with the Hawking effect is calculated in the case of the charged Nariai solution, for the case both of the event horizon and of the cosmological horizon. We apply the Hamilton-Jacobi formalism, and, after a revisitation in the framework of particle creation in external fields {\\sl \\`a la} Nikishov, we consider in particular the case of a charged scalar field on the given background. Due to the knowledge of the exact solutions for the Klein-Gordon equations on Nariai manifold, and to their analytic properties on the extended manifold, we can corroborate the tunneling picture also by means of a direct computation of the flux of particles leaving the horizon.

  10. Cases on Research-Based Teaching Methods in Science Education

    Science.gov (United States)

    de Silva, Eugene, Ed.

    2015-01-01

    While the great scientists of the past recognized a need for a multidisciplinary approach, today's schools often treat math and science as subjects separate from the rest. This not only creates a disinterest among students, but also a potential learning gap once students reach college and then graduate into the workforce. "Cases on…

  11. Classification and Framing in the Case Method: Discussion Leaders' Questions

    Science.gov (United States)

    Badger, James

    2010-01-01

    Basil Bernstein's classification and framing was adopted as a theoretical model to analyse the instruction of two university professors who incorporated case studies into their graduate business and education courses. Classification and framing allows for a meaningful analysis of the discussion leader's questions that facilitate students'…

  12. Case Study Method in Business Education in the USA

    Science.gov (United States)

    Velushchak, Maryna

    2014-01-01

    Business Education is dynamic in nature and needs diverse information to deal with different business problems. To understand the peculiar situations and to manage them effectively, case studies are widely used. Researchers in education have already demonstrated that students' active participation in the educational process increases their…

  13. Multi-media Case Methods in Pre-service Science Education: Enabling an Apprenticeship for Praxis

    Science.gov (United States)

    Bencze, Larry; Hewitt, Jim; Pedretti, Erminia

    2001-04-01

    In recent years, teacher educators have looked to case methods as one means of bridging the theory-practice gap in university-based pre-service programs. This paper explores how case methods may be used to foster habits of praxis - that is, critical, reflective practice - that enable beginning teachers to adapt to the many diverse contexts they may encounter in the field. Our research used qualitative ethnographic methods to determine the efficacy of a case method designed to encourage critical analysis of a Year 8 science Optics lesson. Results suggest student teachers: (1) understood an associated analytical framework; (2) effectively analysed curriculum and pedagogy; and (3) exercised prudence in their assessment of the case. These findings tentatively indicate emerging habits of praxis. Notwithstanding such gains, we encourage designers of case-based curricula to: ensure case authenticity, protect subjects from critique and use multi-media case methods in conjunction with other approaches to promote habits of praxis.

  14. Rethinking a Case Study Method in Educational Research: A Comparative Analysis Method in Qualitative Research

    Science.gov (United States)

    Murakami, Yusuke

    2013-01-01

    There are two types of qualitative research that analyze a small number of cases or a single case: idiographic differentiation and nomothetic/generalization. There are few case studies of generalization. This is because theoretical inclination is weak in the field of education, and the binary framework of quantitative versus qualitative research…

  15. Research into Plagiarism Cases and Plagiarism Detection Methods

    OpenAIRE

    Kashkur, M; Paršutins, S; Borisovs, A

    2010-01-01

    In the age of information technology intellectual property becomes especially valuable. This is one of the causes why the cases of the plagiarism appear more frequently in all vital sectors. Due to that, there is a growing need for different instruments for the protection and verification of copyright for finding plagiarism. Before checking the document for plagiarism, reviewing algorithms and approaches for searching plagiarism, you must know and understand what constitutes the plagiarism. T...

  16. Comparing the Principle-Based SBH Maieutic Method to Traditional Case Study Methods of Teaching Media Ethics

    Science.gov (United States)

    Grant, Thomas A.

    2012-01-01

    This quasi-experimental study at a Northwest university compared two methods of teaching media ethics, a class taught with the principle-based SBH Maieutic Method (n = 25) and a class taught with a traditional case study method (n = 27), with a control group (n = 21) that received no ethics training. Following a 16-week intervention, a one-way…

  17. Structural optimization for multiple structure cases and multiple payload cases with a two-level multipoint approximation method

    Institute of Scientific and Technical Information of China (English)

    An Haichao; Chen Shenyan; Huang Hai

    2016-01-01

    This paper is to address structural optimization problems where multiple structure cases or multiple payload cases can be considered simultaneously. Both types of optimization problems involve multiple finite element models at each iteration step, which draws high demands in opti-mization methods. Considering the common characteristic for these two types of problems, which is that the design domain keeps the same no matter what the structure cases or payload cases are, both problems can be formulated into the unified expressions. A two-level multipoint approxima-tion (TMA) method is firstly improved with the use of analytical sensitivity analysis for structural mass, and then this improved method is utilized to tackle these two types of problems. Based on the commercial finite element software MSC.Patran/Nastran, an optimization system for multiple structure cases and multiple payload cases is developed. Numerical examples are conducted to ver-ify its feasibility and efficiency, and the necessity for the simultaneous optimizations of multiple structure cases and multiple payload cases are illustrated as well.

  18. Anesthesia methods used by anesthetic specialists for circumcision cases

    Science.gov (United States)

    Altaş, Cafer; Küçükosman, Gamze; Yurtlu, Bülent S.; Okyay, Rahşan D.; Aydın, Bengü G.; Pişkin, Özcan; Çimencan, Murat; Ayoğlu, Hilal; Hancı, Volkan; Özkoçak-Turan, Işıl

    2017-01-01

    Objectives: To examine the anesthesiologist’s choice for anesthesia techniques and drugs in circumcision and determine the preoperative examination, intraoperative monitoring techniques, postoperative analgesia methods, and common complications among anesthesiologists working in Turkey. Methods: This cross-sectional study was conducted at Bulent Ecevit University Hospital, Zonguldak, Turkey, between May and July 2012. Survey data were obtained via survey forms through electronic data over the web. The questionnaire consists of 20 questions. These questions included demographic data, methods of anesthesia for circumcision, postoperative analgesia methods, and monitoring methods. Results: The data were obtained from 206 anesthesiologists who agreed to participate in the survey. Circumcision was performed most frequently in the age group of 3-6 years old. It was found that 47% of routine preoperative laboratory tests were coagulation parameters and complete blood count tests. The most common method of anesthesia was laryngeal mask. The frequency of administration of regional anesthesia was 37.4%, and caudal block was more preferable. Bupivacaine as a local anesthetic in regional anesthesia and midazolam and ketamine were the most preferred agents in sedoanalgesia. During regional anesthesia, ultrasound was most often used by anesthesiologists (31.6%). Conclusion: Ambulatory anesthesia protocols, which are also needed in circumcision, can be improved with international recommendation, and these protocols could be conformed as sociocultural structure in societies. This study should be regarded as a preliminary study to attract attention on anesthesia techniques in circumcision. PMID:28042634

  19. THE CONTEMPORARY ARCHITECTURAL DESIGN METHOD: THE CASE OF GROUP NOX

    Directory of Open Access Journals (Sweden)

    Marcela ALMEIDA

    2008-11-01

    Full Text Available Nowadays, different groups of architects search for the possibilities of digital technology contribution to architecture. Among the various stances, this paper particularly highlights the Dutch architects group called NOX, which develops a design method that uses both digital and analogical techniques, as well as incorporates knowledge from other disciplines. The Dutch group’s work serves as a guideline, as it indicates the subjects to be examined. Also based on the studies of other authors, the present research analyses the modifications contemporary architecture is going through, such as matters related to form, design method and conceiving of space, time and reality. Keywords: Contemporary architecture; NOX group; design methodology; digital; analogical.

  20. THE METHODICS OF POSTTRAUMATIC SHOULDER REHABILITATION IN ATHLETES (CASE STUDY

    Directory of Open Access Journals (Sweden)

    Balteanu Veronica

    2014-03-01

    Full Text Available The rehabilitation of the posttraumatic shoulder requires a complex treatment, which demands the implication of several specialists (specialized physician, radiologist, kinesiotherapist. The patient himself plays an important role: he has to be cooperative, active; he must understand the therapeutic act and respect all the indications of the specialists. The upper limb often suffers traumatisms, more serious and more frequent in certain sports branches.The functional rehabilitation – through adequate kinesiotherapeutic means and methods, methodically and systematically applied, within an optimal time frame – will recover the patient’s usual gestures for the respective segment; his social and professional reintegration will also occur as soon as possible.

  1. Application of case analysis teaching method in nursing teaching in Department of Internal Medicine

    Directory of Open Access Journals (Sweden)

    Zhang-xiu SHENG

    2014-04-01

    Full Text Available Objective:In order to adapt to the modern occupation education teaching idea, to stimulate students’ interest in learning, training students' comprehensive quality, improve the students' active participation, understanding, analysis and problem solving skills. Methods: I In the course of different stages using teaching methods of case analysis: case introduction before class teaching method, case analysis during and after class teaching method, and case analysis of the whole chapter after class teaching method.  Results and Conclusion: Through the course of different stages of using case analysis teaching method, we can launch the students’ active learning, stimulate the students' interest in learning, activate classroom atmosphere, train students' independent thinking, strengthen the problems solving ability, improve the self-learning ability of students, activate their participation and awareness, analysis, judgment, introduction, and strengthen students' exam ability, improve the test scores of students and the teaching effect of nursing in Department of internal medicine.

  2. Constructivist Methods in Teaching: The Case for Albania

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    MSc. Alfred Nela

    2016-01-01

    Full Text Available In the previous century many theories were created for the teaching.  One of them is the constructivist method widely used. The focus of constructivist theory is oriented towards the pupil. It presupposes that the environment of learning should provide view points or different interpretations of reality, building knowledge, wealth content, and activities that are based on experience. Constructivism is focused on lore and knowledge and not in mechanic imitation of subject content. It is based on a persuasion that the person builds his lore based on his experience, mental structure and faiths used for interpretation of objects and phenomena. The mind is used like an instrument in the interpretation of the event, goals and prospects because they are personal and individual. The main goal of the survey is the coverage and elaboration of some theoretical and practical views, reported from a considered number of research examples about constructivist methods and an actual analysis of Albanian educational system. As a research methodology we have exploited quantitative data. National and international surveys are used, dedicated, to the evaluation of Albanian Pre-university educational system. In the last decadeAlbania, started adopting some reforms in the teaching methodology. Some experts in educational field published some textbooks and manuals about constructivist methods. Prior to these reforms in the field of teaching, policy making bodies approved ordinance and legal drafts in adjustment of this methodology. But even after these reforms, the Albanian educational system is behind the regional education system in regards to the achievements of pupils. The lack of specific training of educational staff, non-adaptation of educational software, inappropriate physical infrastructure of schools, the lack of technical equipments hamper the practicability of this method. Another aspect is insufficient financial budget dedicated to education. Albanian

  3. Using case methods to study cultural diversity within the development of telematic systems

    DEFF Research Database (Denmark)

    Nøhr, Christian; Bertelsen, Pernille Scholdan; Brender, Jytte

    The report " Using case methods to study cultural diversity within the development of telematic systems" discusses a case study method which is an extension of work orginallly done in Babel, a 5th framework EU project. The report contributes to the discussion identifying operational cultural...

  4. Discounted cash flow valuation methods: Examples of perpetuities, constant growth and general case

    OpenAIRE

    Fernandez, Pablo

    2005-01-01

    This paper explores the discounted cash flow valuation methods. We start the paper with the simplest case: no-growth, perpetual-life companies. Then we will study the continuous growth case and, finally, the general case. The different concepts of cash flow used in company valuation are defined: equity cash flow (ECF), free cash flow (FCF), and capital cash flow (CCF). Then the appropriate discount rate is determined for each cash flow, depending on the valuation method used. Our starting poi...

  5. Methodology or method? A critical review of qualitative case study reports.

    Science.gov (United States)

    Hyett, Nerida; Kenny, Amanda; Dickson-Swift, Virginia

    2014-01-01

    Despite on-going debate about credibility, and reported limitations in comparison to other approaches, case study is an increasingly popular approach among qualitative researchers. We critically analysed the methodological descriptions of published case studies. Three high-impact qualitative methods journals were searched to locate case studies published in the past 5 years; 34 were selected for analysis. Articles were categorized as health and health services (n=12), social sciences and anthropology (n=7), or methods (n=15) case studies. The articles were reviewed using an adapted version of established criteria to determine whether adequate methodological justification was present, and if study aims, methods, and reported findings were consistent with a qualitative case study approach. Findings were grouped into five themes outlining key methodological issues: case study methodology or method, case of something particular and case selection, contextually bound case study, researcher and case interactions and triangulation, and study design inconsistent with methodology reported. Improved reporting of case studies by qualitative researchers will advance the methodology for the benefit of researchers and practitioners.

  6. Use Case Evaluation (UCE): A Method for Early Usability Evaluation in Software Development

    DEFF Research Database (Denmark)

    Stage, Jan; Høegh, Rune Thaarup; Hornbæk, K.;

    2007-01-01

    t is often argued that usability problems should be identified as early as possible during software development, but many usability evaluation methods do not fit well in early development activities. We propose a method for usability evaluation of use cases, a widely used representation of design...... ideas produced early in software development processes. The method proceeds by systematic inspection of use cases with reference to a set of guidelines for usable design. To validate the method, four evaluators inspected a set of use cases for a health care application....

  7. Seismic wave generation systems and methods for cased wells

    Science.gov (United States)

    Minto, James; Sorrells, Martin H; Owen, Thomas E.; Schroeder, Edgar C.

    2011-03-29

    A vibration source (10) includes an armature bar (12) having a major length dimension, and a driver (20A) positioned about the armature bar. The driver (20A) is movably coupled to the armature bar (12), and includes an electromagnet (40). During operation the electromagnet (40) is activated such that the driver (20A) moves with respect to the armature bar (12) and a vibratory signal is generated in the armature bar. A described method for generating a vibratory signal in an object includes positioning the vibration source (10) in an opening of the object, coupling the armature bar (12) to a surface of the object within the opening, and activating the electromagnet (40) of the driver (20A) such that the driver moves with respect to the armature bar (12) and a vibratory signal is generated in the armature bar and the object.

  8. A Two-Point Newton Method Suitable for Nonconvergent Cases and with Super-Quadratic Convergence

    Directory of Open Access Journals (Sweden)

    Ababu Teklemariam Tiruneh

    2013-01-01

    Full Text Available An iterative formula based on Newton’s method alone is presented for the iterative solutions of equations that ensures convergence in cases where the traditional Newton Method may fail to converge to the desired root. In addition, the method has super-quadratic convergence of order 2.414 (i.e., . Newton method is said to fail in certain cases leading to oscillation, divergence to increasingly large number, or offshooting away to another root further from the desired domain or offshooting to an invalid domain where the function may not be defined. In addition when the derivative at the iteration point is zero, Newton method stalls. In most of these cases, hybrids of several methods such as Newton, bisection, and secant methods are suggested as substitute methods and Newton method is essentially blended with other methods or altogether abandoned. This paper argues that a solution is still possible in most of these cases by the application of Newton method alone without resorting to other methods and with the same computational effort (two functional evaluations per iteration like the traditional Newton method. In addition, the proposed modified formula based on Newton method has better convergence characteristics than the traditional Newton method.

  9. Using History To Teach Scientific Method: The Case of Argon

    Science.gov (United States)

    Giunta, Carmen J.

    1998-10-01

    The history of science is full of stories that exhibit scientific methodology to an exemplary degree. Such stories can be vehicles for the teaching of scientific thought to non-science majors in general-education science courses, particularly if they do not involve much technical background and are told in ordinary language. This paper illustrates the kind of lessons that can be gleaned from such stories by examining the discovery of argon, an episode replete with examples of how scientists pursue knowledge. Lord Rayleigh's use of multiple methods to determine the density of nitrogen; his persistent tracking down of a small but real anomaly in those measurements; his and William Ramsay's eventual realization that the anomaly was due to a previously unknown but relatively plentiful component of the atmosphere, an inert, monatomic gas; and Ramsay's subsequent successful search for other members of the inert gas family all illustrate the scientific approach to knowledge. This story can be presented to students in Rayleigh's words, annotated to supply background material and to pose questions.

  10. Estimation methods of eco-environmental water requirements: Case study

    Institute of Scientific and Technical Information of China (English)

    YANG; Zhifeng; CUI; Baoshan; LIU; Jingling

    2005-01-01

    Supplying water to the ecological environment with certain quantity and quality is significant for the protection of diversity and the realization of sustainable development. The conception and connotation of eco-environmental water requirements, including the definition of the conception, the composition and characteristics of eco-environmental water requirements, are evaluated in this paper. The classification and estimation methods of eco-environmental water requirements are then proposed. On the basis of the study on the Huang-Huai-Hai Area, the present water use, the minimum and suitable water requirement are estimated and the corresponding water shortage is also calculated. According to the interrelated programs, the eco-environmental water requirements in the coming years (2010, 2030, 2050) are estimated. The result indicates that the minimum and suitable eco-environmental water requirements fluctuate with the differences of function setting and the referential standard of water resources, and so as the water shortage. Moreover, the study indicates that the minimum eco-environmental water requirement of the study area ranges from 2.84×1010m3 to 1.02×1011m3, the suitable water requirement ranges from 6.45×1010m3 to 1.78×1011m3, the water shortage ranges from 9.1×109m3 to 2.16×1010m3 under the minimum water requirement, and it is from 3.07×1010m3 to 7.53×1010m3 under the suitable water requirement. According to the different values of the water shortage, the water priority can be allocated. The ranges of the eco-environmental water requirements in the three coming years (2010, 2030, 2050) are 4.49×1010m3-1.73×1011m3, 5.99×10m3?2.09×1011m3, and 7.44×1010m3-2.52×1011m3, respectively.

  11. Bayesian network modeling method based on case reasoning for emergency decision-making

    Directory of Open Access Journals (Sweden)

    XU Lei

    2013-06-01

    Full Text Available Bayesian network has the abilities of probability expression, uncertainty management and multi-information fusion.It can support emergency decision-making, which can improve the efficiency of decision-making.Emergency decision-making is highly time sensitive, which requires shortening the Bayesian Network modeling time as far as possible.Traditional Bayesian network modeling methods are clearly unable to meet that requirement.Thus, a Bayesian network modeling method based on case reasoning for emergency decision-making is proposed.The method can obtain optional cases through case matching by the functions of similarity degree and deviation degree.Then,new Bayesian network can be built through case adjustment by case merging and pruning.An example is presented to illustrate and test the proposed method.The result shows that the method does not have a huge search space or need sample data.The only requirement is the collection of expert knowledge and historical case models.Compared with traditional methods, the proposed method can reuse historical case models, which can reduce the modeling time and improve the efficiency.

  12. Methods of lawmaking of the European Court of Human Rights: Do hard cases make bad law? : A case study

    NARCIS (Netherlands)

    Bierkens, Ilona; Vlieks, Caia

    2015-01-01

    In the spirit of Professor Willem Witteveen and his academic fondness for judicial lawmaking, this article analyses the methods of lawmaking by the European Court of Human Rights in ‘hard cases’. To this end, a case study on the ‘hard’ topics of euthanasia and assisted suicide is conducted in light

  13. Analysis method on shoot precision of weapon in small-sample case

    Institute of Scientific and Technical Information of China (English)

    Jiang Jun; Song Baowei; Liang Qingwei

    2007-01-01

    Because of limits of cost, in general, the test data of weapons are shortness. It is always an important topic that to gain scientific results of weapon performance analyses in small-sample case. Based on the analysis of distribution function characteristics and grey mathematics, a weighting grey method in small-sample case is presented. According to the analysis of test data of a weapon, it is proved that the method is a good method to deal with data in the small-sample case and has a high value in the analysis of weapon performance.

  14. A Case Study of a Mixed Methods Study Engaged in Integrated Data Analysis

    Science.gov (United States)

    Schiazza, Daniela Marie

    2013-01-01

    The nascent field of mixed methods research has yet to develop a cohesive framework of guidelines and procedures for mixed methods data analysis (Greene, 2008). To support the field's development of analytical frameworks, this case study reflects on the development and implementation of a mixed methods study engaged in integrated data analysis.…

  15. A Novel Method of Case Representation and Retrieval in CBR for E-Learning

    Science.gov (United States)

    Khamparia, Aditya; Pandey, Babita

    2017-01-01

    In this paper we have discussed a novel method which has been developed for representation and retrieval of cases in case based reasoning (CBR) as a part of e-learning system which is based on various student features. In this approach we have integrated Artificial Neural Network (ANN) with Data mining (DM) and CBR. ANN is used to find the…

  16. The method for staining of anterior lens capsule in cases with small and rigid pupils

    Directory of Open Access Journals (Sweden)

    V. Kumar

    2014-07-01

    Full Text Available Purpose: to evaluate the safety and effectiveness of proposed method for staining with trypan blue anterior lens capsule in cases with small and rigid pupils.Methods: the safety and effectiveness of the proposed method was evaluated in 169 cases having small and rigid pupils of III and IV grade. Surgical steps included: irrigation of anterior chamber with small amount of air, enough to block the pupil; irrigation of posterior chamber with little amount of dye followed by aspiration of air bubble. the excess dye came out and stained the capsule in pupillary area.Results: No difficulty was encountered in irrigating the posterior chamber with dye. Uneven staining of the capsule was noticed in 16 cases (9.5%. In 3 cases (1.8% extensive staining of iris and posterior capsule was observed. Continuous curvilinear capsulorhexis was performed successfully in 97.6% cases. In 4 cases there was radial run of the rhexis extending up to posterior capsule. Postopera- tive inflammation of 1st and 2nd degree was observed in 5.9 and 23.1% cases, which was related to unavoidable trauma to iris tissue during pupil stretching.Conclusion: the proposed method of capsule staining in cases with small and rigid pupils is safe and effective.

  17. The method for staining of anterior lens capsule in cases with small and rigid pupils

    Directory of Open Access Journals (Sweden)

    V. Kumar

    2012-01-01

    Full Text Available Purpose: to evaluate the safety and effectiveness of proposed method for staining with trypan blue anterior lens capsule in cases with small and rigid pupils.Methods: the safety and effectiveness of the proposed method was evaluated in 169 cases having small and rigid pupils of III and IV grade. Surgical steps included: irrigation of anterior chamber with small amount of air, enough to block the pupil; irrigation of posterior chamber with little amount of dye followed by aspiration of air bubble. the excess dye came out and stained the capsule in pupillary area.Results: No difficulty was encountered in irrigating the posterior chamber with dye. Uneven staining of the capsule was noticed in 16 cases (9.5%. In 3 cases (1.8% extensive staining of iris and posterior capsule was observed. Continuous curvilinear capsulorhexis was performed successfully in 97.6% cases. In 4 cases there was radial run of the rhexis extending up to posterior capsule. Postopera- tive inflammation of 1st and 2nd degree was observed in 5.9 and 23.1% cases, which was related to unavoidable trauma to iris tissue during pupil stretching.Conclusion: the proposed method of capsule staining in cases with small and rigid pupils is safe and effective.

  18. IMPLEMENTATION OF THE CASE STUDY METHOD IN DISTANCE LEARNING OF ENTREPRENEURSHIP FUNDAMENTALS

    Directory of Open Access Journals (Sweden)

    O. R. Chepyuk

    2016-01-01

    Full Text Available The aim of the presented publication is to show new opportunities of application of a a case study method (educational situations in modern edu cational process of the higher school in general, and in particular – in teaching fundementals of business and economy wherein this method has gained special popularity.Methods and results. By means of methods of aggregation, deduction and logical synthesis, the authors developed the principles of the organization of distance training of economic disciplines on the basis of the case study method. The structure of educational cases is designated; the standard set of the materials accompanying them is designed. These practical problems were solved within implementation of the project Tempus «Acquisition of Professional and Entrepreneurial Skills by means of Education of Entrepreneurial Spirit and Consultation of the Beginning Entrepreneurs». Possible types and forms of cases were studied; several options of adaptation of their content to the electronic training environment which possesses both restrictions, and extensive additional educational potential are allocated. Various types of cases are shown based on specific examples: illustrating processes and concepts; imitating sample processes; describing original situations in real business and having decisions which are already realized in practice; cases with an uncertain answer to the asked problematic issue. The choice of this or that type of case study tasks is determined by the educational purposes and necessary level of development of a discipline. Cases supplement each other when forming the fund of evaluative means.Scientific novelty. The majority of researches define the case study method as a group discussion in the educational purposes of any problem situation and collective search of its decision, i.e. application of this method assumes classroom full-time courses. The question of use the case study method in a distance format for individual

  19. Recursive least squares method of regression coefficients estimation as a special case of Kalman filter

    Science.gov (United States)

    Borodachev, S. M.

    2016-06-01

    The simple derivation of recursive least squares (RLS) method equations is given as special case of Kalman filter estimation of a constant system state under changing observation conditions. A numerical example illustrates application of RLS to multicollinearity problem.

  20. Using case method to explicitly teach formative assessment in preservice teacher science education

    Science.gov (United States)

    Bentz, Amy Elizabeth

    The process of formative assessment improves student understanding; however, the topic of formative assessment in preservice education has been severely neglected. Since a major goal of teacher education is to create reflective teaching professionals, preservice teachers should be provided an opportunity to critically reflect on the use of formative assessment in the classroom. Case method is an instructional methodology that allows learners to engage in and reflect on real-world situations. Case based pedagogy can play an important role in enhancing preservice teachers' ability to reflect on teaching and learning by encouraging alternative ways of thinking about assessment. Although the literature on formative assessment and case methodology are extensive, using case method to explore the formative assessment process is, at best, sparse. The purpose of this study is to answer the following research questions: To what extent does the implementation of formative assessment cases in methods instruction influence preservice elementary science teachers' knowledge of formative assessment? What descriptive characteristics change between the preservice teachers' pre-case and post-case written reflection that would demonstrate learning had occurred? To investigate these questions, preservice teachers in an elementary methods course were asked to reflect on and discuss five cases. Pre/post-case data was analyzed. Results indicate that the preservice teachers modified their ideas to reflect the themes that were represented within the cases and modified their reflections to include specific ideas or examples taken directly from the case discussions. Comparing pre- and post-case reflections, the data supports a noted change in how the preservice teachers interpreted the case content. The preservice teachers began to evaluate the case content, question the lack of formative assessment concepts and strategies within the case, and apply formative assessment concepts and

  1. [Application of case-based method in genetics and eugenics teaching].

    Science.gov (United States)

    Li, Ya-Xuan; Zhao, Xin; Zhang, Fei-Xiong; Hu, Ying-Kao; Yan, Yue-Ming; Cai, Min-Hua; Li, Xiao-Hui

    2012-05-01

    Genetics and Eugenics is a cross-discipline between genetics and eugenics. It is a common curriculum in many Chinese universities. In order to increase the learning interest, we introduced case teaching method and got a better teaching effect. Based on our teaching practices, we summarized some experiences about this subject. In this article, the main problem of case-based method applied in Genetics and Eugenics teaching was discussed.

  2. CONCEPTUAL DELIMITATIONS REGARDING THE SALES FORECASTING METHODS. CASE STUDY FOR THE SEASONAL COEFFICIENT METHOD

    Directory of Open Access Journals (Sweden)

    Simona Elena Dragomirescu

    2014-07-01

    Full Text Available One of the most important stages in the budget drafting process is the sales forecasting. As a matter of fact, the sales affect the whole activity of a company, their variation being considered the main risk factor for the performance and the financial position of the company. Sales forecasting starts with analyzing the turnover over a longer period of time. It includes all the studies and calculations made in order to determine the potential market to which the company can get access, as well as the part of it that the company is estimated to cover. There are several methods for planning the amount of sales, each company being able to choose one or more such methods. All the sales forecasting methods have advantages and disadvantages; however, in practice it was proved that most large companies use a combination of several methods. However, when there are seasonal variations each year, the seasonal coefficient method is used in order to forecast the sales. The exemplification of this method is done on the level of an production industrial company.

  3. Making Design Decisions Visible: Applying the Case-Based Method in Designing Online Instruction

    Directory of Open Access Journals (Sweden)

    Heng Luo,

    2011-01-01

    Full Text Available The instructional intervention in this design case is a self-directed online tutorial that applies the case-based method to teach educators how to design and conduct entrepreneurship programs for elementary school students. In this article, the authors describe the major decisions made in each phase of the design and development process, explicate the rationales behind them, and demonstrate their effect on the production of the tutorial. Based on such analysis, the guidelines for designing case-based online instruction are summarized for the design case.

  4. Research on conflict resolution of collaborative design with fuzzy case-based reasoning method

    Institute of Scientific and Technical Information of China (English)

    HOU Jun-ming; SU Chong; LIANG Shuang; WANG Wan-shan

    2009-01-01

    Collaborative design is a new style for modern mechanical design to meet the requirement of increasing competition. Designers of different places complete the same work, but the conflict appears in the process of design which may interface the design. Case-based reasoning (CBR) method is applied to the problem of conflict resolution, which is in the artificial intelligence field. However, due to the uncertainties in knowledge representation, attribute description, and similarity measures of CBR, it is very difficult to find the similar cases from case database. A fuzzy CBR method was proposed to solve the problem of conflict resolution in collaborative design. The process of fuzzy CBR was introduced. Based on the feature attributes and their relative weights determined by a fuzzy technique, a fuzzy CBR retrieving mechanism was developed to retrieve conflict resolution cases that tend to enhance the functions of the database. By indexing, calculating the weight and defuzzicating of the cases, the case similarity can be obtained. Then the case consistency was measured to keep the right result. Finally, the fuzzy CBR method for conflict resolution was demonstrated by means of a case study. The prototype system based on web is developed to illustrate the methodology.

  5. Learning the Lessons of Leadership: Case Method Teaching with Interactive Computer-Based Tools and Film-Based Cases

    Science.gov (United States)

    2008-03-01

    technology. This report describes the technological capabilities of the AXL system, as well as the case method pedagogy underlying the AXL approach. The...to read and comprehend, these scenarios generally lack a story-like plot structure, well- developed characters and dialog , and the elements of...it the dialog or the talking head? In U. Hoppe, F. Verdejo & J. Kay (Eds.) Proceedings ofArtificial Intelligence in Education (pp. 47-54). Amsterdam

  6. A case-base sampling method for estimating recurrent event intensities.

    Science.gov (United States)

    Saarela, Olli

    2016-10-01

    Case-base sampling provides an alternative to risk set sampling based methods to estimate hazard regression models, in particular when absolute hazards are also of interest in addition to hazard ratios. The case-base sampling approach results in a likelihood expression of the logistic regression form, but instead of categorized time, such an expression is obtained through sampling of a discrete set of person-time coordinates from all follow-up data. In this paper, in the context of a time-dependent exposure such as vaccination, and a potentially recurrent adverse event outcome, we show that the resulting partial likelihood for the outcome event intensity has the asymptotic properties of a likelihood. We contrast this approach to self-matched case-base sampling, which involves only within-individual comparisons. The efficiency of the case-base methods is compared to that of standard methods through simulations, suggesting that the information loss due to sampling is minimal.

  7. Patellar ligament rupture in the dog: repair methods and patient outcomes in 43 cases.

    Science.gov (United States)

    Das, S; Thorne, R; Lorenz, N D; Clarke, S P; Madden, M; Langley-Hobbs, S J; Perry, K L; Burton, N J; Moores, A L; Mosley, J R

    2014-10-18

    The medical records of dogs receiving surgery for unilateral patellar ligament rupture between 1999 and 2012 at 12 multidisciplinary referral centres were reviewed. Forty-three cases were identified; 26 were traumatic in origin; almost one-third were iatrogenic, of which over three-quarters occurred as a complication following surgical stabilisation of patellar luxation. Treatment involved primary reapposition of the ligament (36 cases). The repair was protected by circumpatellar and/or transpatellar loop(s) of orthopaedic wire, nylon, polypropylene or polydioxanone suture (34 cases). Wire loops were more likely to require surgical removal compared with loops of other materials (P=0.0014). The stifle joint was immobilised postoperatively by the applications of a transarticular external skeletal fixator (taESF) in 17 cases and by external coaptation (EC) in 8 cases; in 18 cases, no postoperative joint immobilisation was provided. Complications specific to the method of immobilisation occurred in seven of the cases with taESF and six of the cases with EC. Revision surgery to address failure of repair was required in five cases. Outcome was classified as acceptable or good in over three-quarters of the cases (31/40) and poor in less than a quarter (9/40). These data highlight patellar ligament rupture as a complication of surgical stabilisation of patellar luxation.

  8. Method selection in adaptation research : the case of the Delta Programme for the Dutch Wadden region

    NARCIS (Netherlands)

    Werners, Saskia Elisabeth; van Loon-Steensma, Jantsje Mintsje; Oost, Albert Peter

    2016-01-01

    Many methods are available to support adaptation planning. Yet there is little guidance on their selection. A recently developed diagnostic framework offers a structured set of criteria to choose research methods for specific adaptation questions. It has been derived from science-driven cases mostly

  9. Success Factors for Using Case Method in Teaching and Learning Software Engineering

    Science.gov (United States)

    Razali, Rozilawati; Zainal, Dzulaiha Aryanee Putri

    2013-01-01

    The Case Method (CM) has long been used effectively in Social Science education. Its potential use in Applied Science such as Software Engineering (SE) however has yet to be further explored. SE is an engineering discipline that concerns the principles, methods and tools used throughout the software development lifecycle. In CM, subjects are…

  10. Recommendations for Using the Case Study Method in International Business Research

    Science.gov (United States)

    Vissak, Tiia

    2010-01-01

    The case study method has not been as frequently used in international business (IB) research as quantitative methods. Moreover, it has been sometimes misused and quite often criticized. Still, it can be very useful for understanding such complex phenomena as the internationalization process or the management of multinational enterprises. Based on…

  11. The Initial Rise Method in the case of multiple trapping levels

    Energy Technology Data Exchange (ETDEWEB)

    Furetta, C. [Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, IPN, Av. Legaria 694, Col. Irrigacion, 11500 Mexico D. F. (Mexico); Guzman, S.; Cruz Z, E. [Instituto de Ciencias Nucleares, UNAM, A. P. 70-543, 04510 Mexico D. F. (Mexico)

    2009-10-15

    The aim of the paper is to extent the well known Initial Rise Method (IR) to the case of multiple trapping levels. The IR method is applied to the minerals extracted from Nopal herb and Oregano spice because the thermoluminescent glow curves shape suggests a trap distribution instead of a single trapping level. (Author)

  12. Connection of Environmental Education with Application of Experiential Teaching Methods: A Case Study from Greece

    Science.gov (United States)

    Koutsoukos, Marios; Fragoulis, Iosif; Valkanos, Euthimios

    2015-01-01

    The main objective of this case study is to examine secondary education teachers' opinions concerning the connection of environmental education with the use of experiential teaching methods. Exploring whether the application of experiential methods can upgrade the learning procedure, leading to a more holistic approach, the research focuses on…

  13. Dental Extrusion with Orthodontic Miniscrew Anchorage: A Case Report Describing a Modified Method

    Directory of Open Access Journals (Sweden)

    Ricardo Fidos Horliana

    2015-01-01

    Full Text Available In recent years, the skeletal anchorage through miniscrews has expanded the treatment options in orthodontics (Yamaguchi et al., 2012. We hereby present a modified method for tooth extrusion for cases where crown-lengthening surgery is contraindicated for aesthetic reasons. This modified method uses three orthodontic appliances: a mini-implant, an orthodontic wire, and a bracket. The aim of this case report was to increase the length of the clinical crown of a fractured tooth (tooth 23 by means of an orthodontic extrusion with the modified method of Roth and Diedrich.

  14. PRODUCT GENE REPRESENTATION AND ACQUISITION METHOD BASED ON POPULATION OF PRODUCT CASES

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The representation and acquisition of a product gene is a crucial problem in product evolutionary design. A new methodology of product gene representation and acquisition from a population of product cases is proposed, and the methodology for product evolutionary design based on a population of product cases is realized. By properly classifying product cases according to its product species, the populations of product cases are divided and a model is established. Knowledge of the scheme design is extracted and formulated as the function base, principle base, and structure base, which are then combined to form a product gene. Subsequently, the product gene tree is created and represented by object-oriented method. Then combining this method with the evolutionary reasoning technology, an intelligent and automatic evolutionary scheme design of product based on the population of product cases is realized. This design method will be helpful in the processing of knowledge formulation, accumulation, and reuse, and in addressing the difficulty of acquiring design knowledge in traditional design. In addition, the disadvantages of manual case adaptation and update in case-based reasoning can be eliminated. Moreover, by optimizing the design scheme in multiple levels and aspects of product function, principle, and structure etc., the level of creativity in the scheme design can be improved.

  15. A statistical evaluation of formation disturbance produced by well- casing installation methods

    Science.gov (United States)

    Morin, R.H.; LeBlanc, D.R.; Teasdale, W.E.

    1988-01-01

    Water-resources investigations concerned with contaminant transport through aquifers comprised of very loose, unconsolidated sediments have shown that small-scale variations in aquifer characteristics can significantly affect solute transport and dispersion. Commonly, measurement accuracy and resolution have been limited by a borehole environment consisting of an annulus of disturbed sediments produced by the casing-installation method. In an attempt to quantify this disturbance and recognize its impact on the characterization of unconsolidated deposits, three installation methods were examined and compared in a sand-and-gravel outwash at a test site on Cape Cod, Massachusetts. These installation methods were: 1) casing installed in a mud-rotary hole; 2) casing installed in an augered hole; and 3) flush-joint steel casing hammer-driven from land surface. Fifteen wells were logged with epithermal neutron and natural gamma tools. Concludes that augering is the most disruptive of the three casing-installation methods and that driving casing directly, though typically a more time-consuming operation, transmits the least amount of disturbance into the surrounding formation. -from Authors

  16. Mathematical properties of a semi-classical signal analysis method: Noisy signal case

    KAUST Repository

    Liu, Dayan

    2012-08-01

    Recently, a new signal analysis method based on a semi-classical approach has been proposed [1]. The main idea in this method is to interpret a signal as a potential of a Schrodinger operator and then to use the discrete spectrum of this operator to analyze the signal. In this paper, we are interested in a mathematical analysis of this method in discrete case considering noisy signals. © 2012 IEEE.

  17. Development of case statements in academic administration: a proactive method for achieving outcomes.

    Science.gov (United States)

    Mundt, Mary H

    2005-01-01

    The complex nature of higher education presents academic administrators with unique challenges to communicate vision and strategic direction to a variety of internal and external audiences. The administrator must be prepared to engage in persuasive communication to describe the needs and desired outcomes of the academic unit. This article focuses on the use of the case statement as a communication tool for the nursing academic administrator. The case statement is a form of persuasive communication where a situation or need is presented in the context of the mission, vision, and strategic direction of a group or organization. The aim of the case statement is to enlist support in meeting the identified need. Fundamental assumptions about communicating case statements are described, as well as guidelines for how the academic administrator can prepare themselves for using the case statement method.

  18. UNDERWATER PHOTOGRAMMETRY METHODS FOR A PECULIAR CASE-STUDY: SAN DOMENICO (PRATO-ITALY

    Directory of Open Access Journals (Sweden)

    E. Pruno

    2015-04-01

    Full Text Available San Domenico Church (Prato, Tuscan, Italy is a very peculiar case of terrestrial archaeology surveyed with underwater archaeological photogrammetric approach. The vault of the choir was completely filled by a very important numbers of potteries, which is very interesting building technique. To document this technique a complete photogrammetric survey was realized, layer by layer, following underwater archaeology system. It is interesting to note that in underwater archaeology such a case is quite rare, in fact or the wreck is in shallow water and the digging can be made (but this case is now unrealistic because in shallow water all the wreck have been stolen – or already excavated by archaeologist – ! or we are in deep water, with well conserved wreck but the depth doesn’t allow the excavation. In the last case only a surface survey is possible. Also for these reasons this particular case- study is very interesting in order to test underwater methods on real case. This experimentation is a good opportunity to develop and check methods, algorithm and software to obtain a relevant model of the site merging 3D measure and knowledge about the artefact as typology, theoretical model, spatial relationship between them. Even if this work started in 2006, with now obsolete digital camera and with a photographic campaign which not respect always the current constraints for building a dense cloud of point in photogrammetry,it is now used as a case-study for developing a relevant approach for underwater archaeology survey.

  19. Compensation effect analysis in DIE method for through-casing measuring formation resistivity

    Science.gov (United States)

    Qing, Chen; Pardo, David; Hong-bin, Li; Fu-rong, Wang

    2011-08-01

    The measuring technique based on Double-Injection-Electrodes (DIE) and its compensation arithmetic method have been proven to be very useful for eliminating the errors caused by electrode-scale mechanical tolerances in formation resistivity measurement through metal case. In this paper, we found that even minor casing joint or casing corrosion may deteriorate the measurement accuracy. Based on theoretical analysis and self-adaptive goal oriented hp-Finite Element (FE) simulations, the compensation effects of DIE measurement technique were estimated. The calculated results from this measuring method are always close to the real formation resistivity, regardless of whether the metal casing is ideal or not. Meanwhile, large errors occur when recording measurements based on Single-Injection-Electrodes (SIE), since the calculated formation resistivity may provide negative values when casing joint or casing corrosion exists. The Double-Injection-Electrode (DIE) measurement technique is predicted to have good compensation effects in many non-ideal situations with uneven metal casing besides electrode-scale mechanical tolerances.

  20. Case Study Teaching Method Improves Student Performance and Perceptions of Learning Gains

    Directory of Open Access Journals (Sweden)

    Kevin M. Bonney

    2015-02-01

    Full Text Available Following years of widespread use in business and medical education, the case study teaching method is becoming an increasingly common teaching strategy in science education. However, the current body of research provides limited evidence that the use of published case studies effectively promotes the fulfillment of specific learning objectives integral to many biology courses. This study tested the hypothesis that case studies are more effective than classroom discussions and textbook reading at promoting learning of key biological concepts, development of written and oral communication skills, and comprehension of the relevance of biological concepts to everyday life. This study also tested the hypothesis that case studies produced by the instructor of a course are more effective at promoting learning than those produced by unaffiliated instructors. Additionally, performance on quantitative learning assessments and student perceptions of learning gains were analyzed to determine whether reported perceptions of learning gains accurately reflect academic performance. The results reported here suggest that case studies, regardless of the source, are significantly more effective than other methods of content delivery at increasing performance on examination questions related to chemical bonds, osmosis and diffusion, mitosis and meiosis, and DNA structure and replication. This finding was positively correlated to increased student perceptions of learning gains associated with oral and written communication skills and the ability to recognize connections between biological concepts and other aspects of life. Based on these findings, case studies should be considered as a preferred method for teaching about a variety of concepts in science courses.

  1. Case study teaching method improves student performance and perceptions of learning gains.

    Science.gov (United States)

    Bonney, Kevin M

    2015-05-01

    Following years of widespread use in business and medical education, the case study teaching method is becoming an increasingly common teaching strategy in science education. However, the current body of research provides limited evidence that the use of published case studies effectively promotes the fulfillment of specific learning objectives integral to many biology courses. This study tested the hypothesis that case studies are more effective than classroom discussions and textbook reading at promoting learning of key biological concepts, development of written and oral communication skills, and comprehension of the relevance of biological concepts to everyday life. This study also tested the hypothesis that case studies produced by the instructor of a course are more effective at promoting learning than those produced by unaffiliated instructors. Additionally, performance on quantitative learning assessments and student perceptions of learning gains were analyzed to determine whether reported perceptions of learning gains accurately reflect academic performance. The results reported here suggest that case studies, regardless of the source, are significantly more effective than other methods of content delivery at increasing performance on examination questions related to chemical bonds, osmosis and diffusion, mitosis and meiosis, and DNA structure and replication. This finding was positively correlated to increased student perceptions of learning gains associated with oral and written communication skills and the ability to recognize connections between biological concepts and other aspects of life. Based on these findings, case studies should be considered as a preferred method for teaching about a variety of concepts in science courses.

  2. Treatment of uncertainty through the interval smart/swing weighting method: a case study

    Directory of Open Access Journals (Sweden)

    Luiz Flávio Autran Monteiro Gomes

    2011-12-01

    Full Text Available An increasingly competitive market means that many decisions must be taken, quickly and with precision, in complex, high risk scenarios. This combination of factors makes it necessary to use decision aiding methods which provide a means of dealing with uncertainty in the judgement of the alternatives. This work presents the use of the MAUT method, combined with the INTERVAL SMART/SWING WEIGHTING method. Although multicriteria decision aiding was not conceived specifically for tackling uncertainty, the combined use of MAUT and the INTERVAL SMART/SWING WEIGHTING method allows approaching decision problems under uncertainty. The main concepts which are involved in these two methods are described and their joint application to the case study concerning the selection of a printing service supplier is presented. The case study makes use of the WINPRE software as a support tool for the calculation of dominance. It is then concluded that the proposed approach can be applied to decision making problems under uncertainty.

  3. [On the indiciary nature of the clinical method: an anthropological view of a published case study].

    Science.gov (United States)

    Quadrelli, Andrea; Cardoso, María Helena Cabral de Almeida; Castiel, Luis David

    2014-08-01

    In this article we present a published case study as an object of reflection. On this basis, we carried out a partial reconstruction of the process of study and diagnostic elaboration of the Uruguay syndrome, showing the circumstances of the case, the selection and interpretation of "clues," and some of the details relevant to the clinical reasoning. Our starting point is the recognition of the narrative nature of clinical knowledge and of the clinical method as an indiciary method. The manuscript of the Uruguay syndrome has a narrative structure adjusted to the conventions of a scientific article, which gives lesser importance to the clinical method. We carried out diverse methodical encounters, mainly involving in-depth interviews with the authors of the manuscript and observation in their workplace. The text seeks to recover the histories of work based on the indiciary or semiotic model of knowledge, and recognize the importance of this model in medical practice.

  4. Case Study of CPT-based Design Methods for Axial Capacity of Driven Piles in Sand

    DEFF Research Database (Denmark)

    Thomassen, Kristina; Ibsen, Lars Bo; Andersen, Lars Vabbersgaard

    2012-01-01

    Today the design of onshore axially loaded driven piles in cohesionless soil is commonly made on basis of CPT-based methods because field investigations have shown strong correlation between the local shaft friction and the CPT cone resistance. However, the recommended design method for axially....... Thus, several CPT-based methods have been proposed for the design of offshore driven piles in cohesionless soil such as the UWA-05, ICP-05, and NGI-99 methods. This article treats a case study where the API-method as well as the UWA-05 and NGI-99 methods are compared using CPT-data from an offshore...... location with dense to very dense sand. The design of the piles in the jacket foundation shows that API-00 for both the tension and the compression loads predicted much longer piles than the CPT-based methods. Variation of the pile length and pile diameter shows that NGI-99 and UWA-05 predicts almost...

  5. Actors’ Competencies or Methods? A Case Study of Successful Information Systems Development

    DEFF Research Database (Denmark)

    Omland, Hans Olav; Nielsen, Peter Axel

    2009-01-01

    and methods are exercised. Emphasising the intertwining of competencies and methods, we discuss the character of the intertwining process, how different actors relate to different methods, and how methods may be part of the problem rather than part of the solution to challenges in information systems......Research on information systems development methods has by and large acknowledged a significant difference between a method and its use and that the use depends on the situation and the developers, as well as other contingencies. We extend this research and focus in particular on the relationship...... between actors’ competencies and their deployment of methods, arguing that this relationship is described over-simplistically and needs a better explanation. Through a case study of a successful information systems development project we identify some central situations where a variety of competencies...

  6. The method of fundamental solutions for transient heat conduction in functionally graded materials: some special cases

    Directory of Open Access Journals (Sweden)

    Mohammad Nili Ahmadabadi

    2014-05-01

    Full Text Available In this paper, the Method of Fundamental Solutions (MFS is extended to solve some special cases of the problem of transient heat conduction in functionally graded mate- rials. First, the problem is transformed to a heat equation with constant coecients using a suitable new transformation and then the MFS together with the Tikhonov regularization method is used to solve the resulting equation

  7. A statistical method utilizing information of imported cases to estimate the transmissibility for an influenza pandemic

    OpenAIRE

    Chong, Ka Chun; Zee, Benny Chung Ying; Wang, Maggie Haitian

    2017-01-01

    Background In a new influenza pandemic, travel data such as arrival times of cases seeded by the originating country can be regarded as a combination of the epidemic size and the mobility networks of infections connecting the originating country with other regions. It can be a complete and timely source for estimating the basic reproduction number (R 0 ), a key indicator of disease transmissibility. Method In this study, we developed a likelihood-based method using arrival times of infected c...

  8. Halogen bonded supramolecular capsules: a challenging test case for quantum chemical methods.

    Science.gov (United States)

    Sure, Rebecca; Grimme, Stefan

    2016-08-02

    Recently, Diederich et al. synthesized the first supramolecular capsule with a well-defined four-point halogen bonding interaction [Angew. Chem., Int. Ed., 2015, 54, 12339]. This interesting system comprising about 400 atoms represents a challenging test case for accurate quantum chemical methods. We investigate it with our new density functional based composite method for structures and noncovalent interactions (PBEh-3c) as well as our standard protocol for supramolecular thermochemistry and give predictions for chemical modifications to improve the binding strength.

  9. The CRF-method for semiconductors' intravalley collision kernels: II – The 3D case

    Directory of Open Access Journals (Sweden)

    Claudio Barone

    1993-05-01

    Full Text Available If the collisions are redefined as a flux a kinetic conservation law can be written in divergence form. This can be handled numerically, in the framework of Finite Particle Approximation, using the CRF-method. In this paper we use the CRF-method for semiconductors' intravalley collision kernels. We extend the results obtained in a previous paper to the case of a 3D momentum space.

  10. The CRF-method for semiconductors' intravalley collision kernels: I – the 2D case

    Directory of Open Access Journals (Sweden)

    Claudio Barone

    1992-05-01

    Full Text Available If the collisions are redefined as a flux a kinetic conservation law can be written in divergence form. This can be handled numerically, in the framework of Finite Particle Approximation, using the CRF-method. In the present paper the relevant quantities needed for computer implementation of the CRF-method are derived in the case of a 2D momentum space for the semiconductors' intravalley collision kernels.

  11. Retrospective Study of Postmortem Cases of ‘Hanging – A Method Of Suicide

    Directory of Open Access Journals (Sweden)

    Mohammed Ziyauddin G Saiyed

    2013-07-01

    Full Text Available Introduction and Objective: Hanging is a form of violent asphyxial death. It produces painless death for the victims so that it is a widely accepted method of suicide. The rate of suicidal hanging cases is increasing day by day. The Objective of study is to find out demography of hanging, its distribution according to age group, sex, most common ligature material used by victim and observed post-mortem findings and in this way try to identify the causative factors and developing the preventive measures that are essential to reduce death due to hanging.Material and Methods: A retrospective study of hanging cases reported to mortuary of Vadilal Sarabhai General Hospital, Ahmedabad during a period of 2 years, (from November 2009 to October 2011 is carried out.Results: Out of total 2244 cases of post-mortem during 2 years, 74 (3.29% were hanging cases. Maximum cases 34 (45.94% of death due to hanging seen in age group 21-30 years. Majority of cases 46 (62.16% were observed in Males. Majority of victims have used Dupatta, 40 (54.05% as a ligature material. Manner of death is suicide in all cases. Cyanosis, salivary marks and petechial hemorrhage in brain observed in variable number of cases. Conclusion: Suicide by Hanging has become very common now a days. A well designed and comprehensive programme is needed to identify the causative factor and prevention of suicidal hanging. Appropriate education, reducing unemployment, improving the quality of self esteem and involvement of young generation in encouraging activities may reduce rate of death due to hanging

  12. Treatment of 60 Cases of Paranasal Sinusitis with Point-through-point Acupuncture Method

    Institute of Scientific and Technical Information of China (English)

    汪永胜; 洪珏

    2010-01-01

    @@ Paranasal sinusitis,named "Bi Yuan" in traditional Chinese medicine,is a clinically common disease,usually not responding well to acupuncture-moxibustion therapy.The author has adopted a point-through-point acupuncture method for treating 60 cases of paranasal sinusitis,and now report as follows.

  13. Treatment of 56 Cases of Women with Post-adolescent Acne by Auricular Point Sticking Method

    Institute of Scientific and Technical Information of China (English)

    DING Min; JIANG Ya-qiu; CUI Xue-jun

    2008-01-01

    @@ Acne is a common disorder in adolescence. However, more and more patients are over 25 years old. This type of acne is recurrent, so it is called post-adolescence acne. The author treated 56 cases of women with post-adolescence acne by auricular point sticking method, and obtained excellent results. It is reported as follows.

  14. Words Speak Louder than Action?: A Mixed-Methods Case Study

    Science.gov (United States)

    Vincent, Stacy K.; Kirby, Andrea T.

    2015-01-01

    The purpose of this mixed-methods case study was to examine the dynamic of Culturally Responsive Pedagogy (Gay, 2010) among nine secondary agriculture teachers in ethnically diverse schools. By reviewing the diversity of student enrollment in the agriculture programs, the participants were separated by two groups: diverse and non-diverse. A hybrid…

  15. Mixed Methods Case Study of Generational Patterns in Responses to Shame and Guilt

    Science.gov (United States)

    Ng, Tony

    2013-01-01

    Moral socialization and moral learning are antecedents of moral motivation. As many as 4 generations interact in workplace and education settings; hence, a deeper understanding of the moral motivation of members of those generations is needed. The purpose of this convergent mixed methods case study was to understand the moral motivation of 5…

  16. Using the Case Study Method to Enhance the Learning Skills of Supply Chain Management Students

    Science.gov (United States)

    Naude, M.; Derera, E.

    2014-01-01

    Higher education institutions need to align themselves more closely with the needs of businesses and equip students with the skills and experience necessary to make them more successful and value-adding employees. This paper explores undergraduate student perceptions of the effectiveness of the case study teaching and learning method in the…

  17. The Effect of English Language Learning on Creative Thinking Skills: A Mixed Methods Case Study

    Science.gov (United States)

    Sehic, Sandro

    2017-01-01

    The purpose of this sequential explanatory mixed-methods case study was to investigate the effects of English language learning on creative thinking skills in the domains of fluency, flexibility, originality, and elaboration as measured with the Alternate Uses Test. Unlike the previous research studies that investigated the links between English…

  18. Signature Pedagogies and Legal Education in Universities: Epistemological and Pedagogical Concerns with Langdellian Case Method

    Science.gov (United States)

    Hyland, Aine; Kilcommins, Shane

    2009-01-01

    This paper offers an analysis of Lee S. Shulman's concept of "signature pedagogies" as it relates to legal education. In law, the signature pedagogy identified by Shulman is the Langdellian case method. Though the concept of signature pedagogies provides an excellent infrastructure for the exchange of teaching ideas, Shulman has a tendency to…

  19. Accelerating the Use of Weblogs as an Alternative Method to Deliver Case-Based Learning

    Science.gov (United States)

    Chen, Charlie; Wu, Jiinpo; Yang, Samuel C.

    2008-01-01

    Weblog technology is an alternative medium to deliver the case-based method of learning business concepts. The social nature of this technology can potentially promote active learning and enhance analytical ability of students. The present research investigates the primary factors contributing to the adoption of Weblog technology by students to…

  20. Treatment of 24 Cases of Knee Joint Osteoarthritis by the Method of Selecting Points in Same-name Meridians

    Institute of Scientific and Technical Information of China (English)

    HAN Cai-yun; WU Xue-fei

    2003-01-01

    Method of selecting points in foot-hand same-name meridians was used to treat 24 cases of Osteoarthritis of knee joint, and the therapeutic results showed 15 cases were cured, 4 cases got significant effect and 4 cases got improvement.

  1. EXPLORATION BY MEANS OF GEOPHYSICAL METHODS OF GEOTHERMAL FIELDS AND CASE STUDIES

    Directory of Open Access Journals (Sweden)

    Züheyr KAMACI

    1997-01-01

    Full Text Available Geothermal energy which is one of the reuseable energy resources, can save as much as 77 million barrels of petroleum equivalent annually when used in the production of electricity and heating-environment. Geophysical exploration methods plays in important role in the fields of geothermal exploration, development and observational studies. Thermal and geoelectrical methods are the most effective methods which shows the temperature variation anomalies and mechanical drilling places. But, when the other methods of gravity, magnetic, radiometric, well geophysics and well logs can be used in conjunction with seismic tomography, apart from the mentioned geophysical exploration method, better results could be obtained. From the above mentioned facts various case history reports are given from our country and worldwide to determine geothermal energy resources by using geophysical exploration technique application. From these results of studies a 55 °C hot water artessian aquifer is found in the Uşak-Banaz geothermal field by applying geoelectrical methods.

  2. Conditional likelihood methods for haplotype-based association analysis using matched case-control data.

    Science.gov (United States)

    Chen, Jinbo; Rodriguez, Carmen

    2007-12-01

    Genetic epidemiologists routinely assess disease susceptibility in relation to haplotypes, that is, combinations of alleles on a single chromosome. We study statistical methods for inferring haplotype-related disease risk using single nucleotide polymorphism (SNP) genotype data from matched case-control studies, where controls are individually matched to cases on some selected factors. Assuming a logistic regression model for haplotype-disease association, we propose two conditional likelihood approaches that address the issue that haplotypes cannot be inferred with certainty from SNP genotype data (phase ambiguity). One approach is based on the likelihood of disease status conditioned on the total number of cases, genotypes, and other covariates within each matching stratum, and the other is based on the joint likelihood of disease status and genotypes conditioned only on the total number of cases and other covariates. The joint-likelihood approach is generally more efficient, particularly for assessing haplotype-environment interactions. Simulation studies demonstrated that the first approach was more robust to model assumptions on the diplotype distribution conditioned on environmental risk variables and matching factors in the control population. We applied the two methods to analyze a matched case-control study of prostate cancer.

  3. Applying Process Improvement Methods to Clinical and Translational Research: Conceptual Framework and Case Examples.

    Science.gov (United States)

    Daudelin, Denise H; Selker, Harry P; Leslie, Laurel K

    2015-12-01

    There is growing appreciation that process improvement holds promise for improving quality and efficiency across the translational research continuum but frameworks for such programs are not often described. The purpose of this paper is to present a framework and case examples of a Research Process Improvement Program implemented at Tufts CTSI. To promote research process improvement, we developed online training seminars, workshops, and in-person consultation models to describe core process improvement principles and methods, demonstrate the use of improvement tools, and illustrate the application of these methods in case examples. We implemented these methods, as well as relational coordination theory, with junior researchers, pilot funding awardees, our CTRC, and CTSI resource and service providers. The program focuses on capacity building to address common process problems and quality gaps that threaten the efficient, timely and successful completion of clinical and translational studies.

  4. The use of rapid review methods in health technology assessments: 3 case studies

    Directory of Open Access Journals (Sweden)

    Eva Kaltenthaler

    2016-08-01

    Full Text Available Abstract Background Rapid reviews are of increasing importance within health technology assessment due to time and resource constraints. There are many rapid review methods available although there is little guidance as to the most suitable methods. We present three case studies employing differing methods to suit the evidence base for each review and outline some issues to consider when selecting an appropriate method. Methods Three recently completed systematic review short reports produced for the UK National Institute for Health Research were examined. Different approaches to rapid review methods were used in the three reports which were undertaken to inform the commissioning of services within the NHS and to inform future trial design. We describe the methods used, the reasoning behind the choice of methods and explore the strengths and weaknesses of each method. Results Rapid review methods were chosen to meet the needs of the review and each review had distinctly different challenges such as heterogeneity in terms of populations, interventions, comparators and outcome measures (PICO and/or large numbers of relevant trials. All reviews included at least 10 randomised controlled trials (RCTs, each with numerous included outcomes. For the first case study (sexual health interventions, very diverse studies in terms of PICO were included. P-values and summary information only were presented due to substantial heterogeneity between studies and outcomes measured. For the second case study (premature ejaculation treatments, there were over 100 RCTs but also several existing systematic reviews. Data for meta-analyses were extracted directly from existing systematic reviews with new RCT data added where available. For the final case study (cannabis cessation therapies, studies included a wide range of interventions and considerable variation in study populations and outcomes. A brief summary of the key findings for each study was presented and

  5. Verification of statistical method CORN for modeling of microfuel in the case of high grain concentration

    Energy Technology Data Exchange (ETDEWEB)

    Chukbar, B. K., E-mail: bchukbar@mail.ru [National Research Center Kurchatov Institute (Russian Federation)

    2015-12-15

    Two methods of modeling a double-heterogeneity fuel are studied: the deterministic positioning and the statistical method CORN of the MCU software package. The effect of distribution of microfuel in a pebble bed on the calculation results is studied. The results of verification of the statistical method CORN for the cases of the microfuel concentration up to 170 cm{sup –3} in a pebble bed are presented. The admissibility of homogenization of the microfuel coating with the graphite matrix is studied. The dependence of the reactivity on the relative location of fuel and graphite spheres in a pebble bed is found.

  6. Application of Participatory Learning and Action Methods in Educational Technology Research A Rural Bangladeshi Case

    DEFF Research Database (Denmark)

    Khalid, Md. Saifuddin; Nyvang, Tom

    2013-01-01

    This chapter examines barriers and methods to identify barriers to educational technology in a rural technical vocational education and training institute in Bangladesh. It also examines how the application of participatory learning and action methods can provide information for barrier research...... and stakeholders in and around the school to pave the way for change by building awareness of both educational technology and the complexity of barriers. In this case study, school stakeholders are involved in the research and awareness-building process through three different data-production methods: cultural...

  7. Valid statistical inference methods for a case-control study with missing data.

    Science.gov (United States)

    Tian, Guo-Liang; Zhang, Chi; Jiang, Xuejun

    2016-05-19

    The main objective of this paper is to derive the valid sampling distribution of the observed counts in a case-control study with missing data under the assumption of missing at random by employing the conditional sampling method and the mechanism augmentation method. The proposed sampling distribution, called the case-control sampling distribution, can be used to calculate the standard errors of the maximum likelihood estimates of parameters via the Fisher information matrix and to generate independent samples for constructing small-sample bootstrap confidence intervals. Theoretical comparisons of the new case-control sampling distribution with two existing sampling distributions exhibit a large difference. Simulations are conducted to investigate the influence of the three different sampling distributions on statistical inferences. One finding is that the conclusion by the Wald test for testing independency under the two existing sampling distributions could be completely different (even contradictory) from the Wald test for testing the equality of the success probabilities in control/case groups under the proposed distribution. A real cervical cancer data set is used to illustrate the proposed statistical methods.

  8. An Investigation of Science Teachers’ Teaching Methods and Techniques: Amasya Case

    Directory of Open Access Journals (Sweden)

    Orhan KARAMUSTAFAOĞLU

    2014-10-01

    Full Text Available The purpose of this study is to determine the methods and techniques science teachers mostly employ in their classrooms. To collect data, the researchers employed a survey with 60 science teachers and randomly selected 6 of them to observe these selected teachers in real classroom situation. Furthermore, the researchers invited 154 students taught by the selected 6 teachers in this study, for focus group interviewing. After analyzing the collected data, the researchers found that teachers in this study 1 were more likely to use narrative method, 2 supported their teaching with question and answer, demonstration, case study, and problem solving methods and techniques, and 3 rarely employed student centered discussion, laboratory practice, role playing and project-based learning methods in their classroom. Consequently, there exist some differences between theory and practice regarding teaching methods and techniques of teachers in this study.

  9. Odontoma-associated tooth impaction: accurate diagnosis with simple methods? Case report and literature review.

    Science.gov (United States)

    Troeltzsch, Matthias; Liedtke, Jan; Troeltzsch, Volker; Frankenberger, Roland; Steiner, Timm; Troeltzsch, Markus

    2012-10-01

    Odontomas account for the largest fraction of odontogenic tumors and are frequent causes of tooth impaction. A case of a 13-year-old female patient with an odontoma-associated impaction of a mandibular molar is presented with a review of the literature. Preoperative planning involved simple and convenient methods such as clinical examination and panoramic radiography, which led to a diagnosis of complex odontoma and warranted surgical removal. The clinical diagnosis was confirmed histologically. Multidisciplinary consultation may enable the clinician to find the accurate diagnosis and appropriate therapy based on the clinical and radiographic appearance. Modern radiologic methods such as cone-beam computed tomography or computed tomography should be applied only for special cases, to decrease radiation.

  10. Technical aspects and manufacturing methods for JT-60SA toroidal field coil casings

    Energy Technology Data Exchange (ETDEWEB)

    Rossi, Paolo, E-mail: paolo.rossi@enea.it [ENEA, Via Enrico Fermi 45, 00044 Frascati, Rome (Italy); Cucchiaro, A.; Brolatti, G.; Cocilovo, V.; Ginoulhiac, G.; Polli, G. [ENEA, Via Enrico Fermi 45, 00044 Frascati, Rome (Italy); Gabriele, M.; Di Muzio, F. [Walter Tosto, Via Erasmo Piaggio, 66100 Chieti (Italy); Philips, G.; Tomarchio, V. [JT-60SA European Home Team, Boltzmannstrasse 2, D-85748 Garching (Germany)

    2014-10-15

    Highlights: • A contract between ENEA and Walter Tosto started on July 2012 for the construction of 18 TF coil casings for JT-60SA. • Design and manufacturing of mock-ups representative of straight and curved legs of the casings have been completed. • Final design of the casings has been completed and manufacturing activities have already started and are ongoing. • The completion of the first three casings will be completed within the end of 2013 and the production of all the 18 casings is foreseen by the end of 2015. - Abstract: JT-60SA is a superconducting tokamak machine to be assembled in Naka site, Japan, designed to contribute to the early realization of fusion energy by supporting the exploitation of ITER and research toward DEMO. In the frame of the Broader Approach Agreement a contract between ENEA and Walter Tosto (Chieti, Italy) started on July 2012 for the construction of 18 TF coil casings for JT-60SA. Two different sets of 9 casings each will be progressively delivered, from 2013 to the end of 2015, to ASG Superconductors (Genoa, Italy) and to Alstom (Belfort, France), where the integration of the winding pack into the casing will be carried out. Each TF coil casing (height 7.5 m and width 4.5 m) consists of four main components: one “Straight Leg Outboard” and one “Curved Leg Outboard” both with their own covers, “Straight Leg Inboard” and “Curved Leg Inboard”. The casing components are segmented in forgings and plates made of FM316LNL. The straight leg outboard is composed of two wings welded to a central core and two elbows welded at the ends with a cooling channel installed inside. Elbows of straight leg outboard are segmented in two half-elbows machined from 1 rough forging and welded to the central core made by plate. Welding of wings to the central core is performed in EBW (electron beam welding) and the straight part is welded to the elbows by NGTIG (TIG narrow gap) process. The curved leg outboard is composed of two

  11. Analysis of a Prototypical Multiscale Method Coupling Atomistic and Continuum Mechanics:the Convex Case

    Institute of Scientific and Technical Information of China (English)

    Xavier Blanc; Claude Le Bris; Prédéric Legol

    2007-01-01

    In order to describe a solid which deforms smoothly in some region,but non smoothly in some other region,many multiscale methods have been recently proposed that aim at coupling an atonfistic model (discrete mechanics)with a macroscopic model(continuum mechanics).We provide here a theoretical basis for such a coupling in a one-dimensional setting,in the case of convex energy.

  12. Case studies illustrating in-situ remediation methods for soil and groundwater contaminated with petrochemicals

    Energy Technology Data Exchange (ETDEWEB)

    Dixon, Robert A.; Lance, P.E.; Downs, A.; Kier, Brian P. [EMCON Northwest Inc., Portland, OR (United States)

    1993-12-31

    Four case studies of successful in-situ remediation are summarized illustrating cost-effective methods to remediate soil and groundwater contaminated with volatile and non-volatile petrochemicals. Each site is in a different geologic environment with varying soil types and with and without groundwater impact. The methods described include vadose zone vapor extraction, high-vacuum vapor extraction combined with groundwater tab.le depression, air sparging with groundwater recovery and vapor extraction, and bio remediation of saturated zone soils using inorganic nutrient and oxygen addition

  13. Clustering as an EDA Method: The Case of Pedestrian Directional Flow Behavior

    Directory of Open Access Journals (Sweden)

    Ma. Regina E. Estuar

    2010-01-01

    Full Text Available Given the data of pedestrian trajectories in NTXY format, three clustering methods of K Means, Expectation Maximization (EM and Affinity Propagation were utilized as Exploratory Data Analysis to find the pattern of pedestrian directional flow behavior. The analysis begins without a prior notion regarding the structure of the pattern and it consequentially infers the structure of directional flow pattern. Significant similarities in patterns for both individual and instantaneous walking angles based on EDA method are reported and explained in case studies

  14. NOISE REDUCTION SCHEDULING METHOD IN A SHOP FLOOR AND ITS CASE STUDY

    Institute of Scientific and Technical Information of China (English)

    Liu Fei; Cao Huajun; Zhang Hua; Yuan Chuanping

    2003-01-01

    Noise reduction in a shop floor is one of the important parts of green manufacturing. In a shop floor, machine tools are the main noise sources in a shop floor. A new approach is discovered by investigation that the noise can be obviously reduced in a shop floor by optimizing the scheduling between work pieces and machine tools. Based on the discovery, a new method of noise reduction is proposed. A noise reduction scheduling model in a shop floor is established, and the application of the model is also discussed. A case is studied, which shows that the method and model are practical.

  15. Estimating the economic impacts of ecosystem restoration—Methods and case studies

    Science.gov (United States)

    Cullinane Thomas, Catherine; Huber, Christopher; Skrabis, Kristin; Sidon, Joshua

    2016-04-05

    Federal investments in ecosystem restoration projects protect Federal trusts, ensure public health and safety, and preserve and enhance essential ecosystem services. These investments also generate business activity and create jobs. It is important for restoration practitioners to be able to quantify the economic impacts of individual restoration projects in order to communicate the contribution of these activities to local and national stakeholders. This report provides a detailed description of the methods used to estimate economic impacts of case study projects and also provides suggestions, lessons learned, and trade-offs between potential analysis methods.

  16. Thin bed responses and correction methods for cased hole density logging

    Institute of Scientific and Technical Information of China (English)

    Wu Wensheng; Zhang Yuling

    2008-01-01

    The study of the thin bed responses and correction methods in cased hole density logging can provide a theoretical basis for research to improve data processing methods. By using the Monte Carlo program MCNP, the change of detector count from thin beds with the vertical depth was calculated at different casing thicknesses. The calculation showed that with the low density thin bed moving upward,detector count first increased to a maximum then decreased. The responses of a thin bed with a high density were opposite to those of a thin bed with a low density. The change curve was symmetrical, and the maximums or minimums appeared at the midpoint between the detector and source. Besides, detector count increased with increasing thin bed thickness. At a specific thin bed thickness, further increase of thin bed thickness resulted in a slow increase of detector count then the count rate leveled off. In actual logging, the influence of adjacent formations on density log measurements can be ignored. Finally, based on numerical simulation correction methods for the dual influence of casing and thin beds are discussed.

  17. Case studies of sealing methods and materials used in the salt and potash mining industries

    Energy Technology Data Exchange (ETDEWEB)

    Eyermann, T.J.; Sambeek, L.L. Van [RE/SPEC Inc., Rapid City, SD (United States); Hansen, F.D. [Sandia National Labs., Albuquerque, NM (United States). Repository Isolation Systems Dept.

    1995-11-01

    Sealing methods and materials currently used in salt and potash industries were surveyed to determine if systems analogous to the shaft seal design proposed for the Waste Isolation Pilot Plant (WIPP) exist. Emphasis was first given to concrete and then expanded to include other materials. Representative case studies could provide useful design, construction, and performance information for development of the WIPP shaft seal system design. This report contains a summary of engineering and construction details of various sealing methods used by mining industries for bulkheads and shaft liners. Industrial experience, as determined from site visits and literature reviews, provides few examples of bulkheads built in salt and potash mines for control of water. Sealing experiences representing site-specific conditions often have little engineering design to back up the methods employed and even less quantitative evaluation of seal performance. Cases examined include successes and failures, and both contribute to a database of experiences. Mass salt-saturated concrete placement under ground was accomplished under several varied conditions. Information derived from this database has been used to assess the performance of concrete as a seal material. Concrete appears to be a robust material with successes in several case studies. 42 refs.

  18. The Case Anatomical Knowledge Index (CAKI): A Novel Method Used to Assess Anatomy Content in Clinical Cases

    Science.gov (United States)

    Banda, Sekelani S.

    2009-01-01

    There are concerns in the literature that the use of case-based teaching of anatomy could be compromising the depth and scope of anatomy learned by students in a problem-based learning curriculum. Poor selection of clinical cases that are used as vehicles for teaching/learning anatomy may be the root problem because some clinical cases do not…

  19. Synthetic cathinone pharmacokinetics, analytical methods, and toxicological findings from human performance and postmortem cases.

    Science.gov (United States)

    Ellefsen, Kayla N; Concheiro, Marta; Huestis, Marilyn A

    2016-05-01

    Synthetic cathinones are commonly abused novel psychoactive substances (NPS). We present a comprehensive systematic review addressing in vitro and in vivo synthetic cathinone pharmacokinetics, analytical methods for detection and quantification in biological matrices, and toxicological findings from human performance and postmortem toxicology cases. Few preclinical administration studies examined synthetic cathinone pharmacokinetic profiles (absorption, distribution, metabolism, and excretion), and only one investigated metabolite pharmacokinetics. Synthetic cathinone metabolic profiling studies, primarily with human liver microsomes, elucidated metabolite structures and identified suitable biomarkers to extend detection windows beyond those provided by parent compounds. Generally, cathinone derivatives underwent ketone reduction, carbonylation of the pyrrolidine ring, and oxidative reactions, with phase II metabolites also detected. Reliable analytical methods are necessary for cathinone identification in biological matrices to document intake and link adverse events to specific compounds and concentrations. NPS analytical methods are constrained in their ability to detect new emerging synthetic cathinones due to limited commercially available reference standards and continuous development of new analogs. Immunoassay screening methods are especially affected, but also gas-chromatography and liquid-chromatography mass spectrometry confirmation methods. Non-targeted high-resolution-mass spectrometry screening methods are advantageous, as they allow for retrospective data analysis and easier addition of new synthetic cathinones to existing methods. Lack of controlled administration studies in humans complicate interpretation of synthetic cathinones in biological matrices, as dosing information is typically unknown. Furthermore, antemortem and postmortem concentrations often overlap and the presence of other psychoactive substances are typically found in combination

  20. Analytical and numerical methods for computing electron partial intensities in the case of multilayer systems

    Energy Technology Data Exchange (ETDEWEB)

    Afanas’ev, Victor P., E-mail: afanasyevvip@gmail.com [Department of General Physics and Nuclear Fusion, National Research University “Moscow Power Engineering Institute”, Krasnokazarmennaya, 14, Moscow 111250 (Russian Federation); Efremenko, Dmitry S. [Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Methodik der Fernerkundung (IMF), 82234 Oberpfaffenhofen (Germany); Kaplya, Pavel S., E-mail: pavel@kaplya.com [Department of General Physics and Nuclear Fusion, National Research University “Moscow Power Engineering Institute”, Krasnokazarmennaya, 14, Moscow 111250 (Russian Federation)

    2016-07-15

    Highlights: • The OKG-model is extended to finite thickness layers. • An efficient matrix technique for computing partial intensities is proposed. • Good agreement is obtained for computed partial intensities and experimental data. - Abstract: We present two novel methods for computing energy spectra and angular distributions of electrons emitted from multi-layer solids. They are based on the Ambartsumian–Chandrasekhar (AC) equations obtained by using the invariant imbedding method. The first method is analytical and relies on a linearization of AC equations and the use of the small-angle approximation. The corresponding solution is in good agreement with that computed by using the Oswald–Kasper–Gaukler (OKG) model, which is extended to the case of layers of finite thickness. The second method is based on the discrete ordinate formalism and relies on a transformation of the AC equations to the algebraic Ricatti and Lyapunov equations, which are solved by using the backward differential formula. Unlike the previous approach, this method can handle both linear and nonlinear equations. We analyze the applicability of the proposed methods to practical problems of computing REELS spectra. To demonstrate the efficiency of the proposed methods, several computational examples are considered. Obtained numerical and analytical solutions show good agreement with the experimental data and Monte-Carlo simulations. In addition, the impact of nonlinear terms in the Ambartsumian–Chandrasekhar equations is analyzed.

  1. A Method to Select Test Input Cases for Safety-critical Software

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Heeeun; Kang, Hyungook [Korea Advanced Institute of Science and Technology, Daejeon (Korea, Republic of); Son, Hanseong [Joongbu Univ., Geumsan (Korea, Republic of)

    2013-05-15

    This paper proposes a new testing methodology for effective and realistic quantification of RPS software failure probability. Software failure probability quantification is important factor in digital system safety assessment. In this study, the method for software test case generation is briefly described. The test cases generated by this method reflect the characteristics of safety-critical software and past inputs. Furthermore, the number of test cases can be reduced, but it is possible to perform exhaustive test. Aspect of software also can be reflected as failure data, so the final failure data can include the failure of software itself and external influences. Software reliability is generally accepted as the key factor in software quality since it quantifies software failures which can make a powerful system inoperative. In the KNITS (Korea Nuclear Instrumentation and Control Systems) project, the software for the fully digitalized reactor protection system (RPS) was developed under a strict procedure including unit testing and coverage measurement. Black box testing is one type of Verification and validation (V and V), in which given input values are entered and the resulting output values are compared against the expected output values. Programmable logic controllers (PLCs) were used in implementing critical systems and function block diagram (FBD) is a commonly used implementation language for PLC.

  2. Investigation of multi-criteria method for the assessment of sustainable development: The case of Lithuania

    Directory of Open Access Journals (Sweden)

    Roberta Kareivaitė

    2015-09-01

    Full Text Available The process of implementing sustainable development started at the end of the 20th century with the aim to balance economic, social and environmental development and minimize damage to humans and the environment. Nowadays, when new economic problems emerge social interest groups lobby, environmental standards are raised, sustainable development becomes an integral part of democratic society and is a particularly relevant object of scientific investigations. Taking into consideration the aspect of sustainable development complex assessment, the research problem can be formulated as follows: how to assess sustainable development comprehensively? This research, according to statistical data analysis (Lithuania’s case, identifies multi-criteria method (SAW as the best method of analyzing sustainable development from the approach of different dimensions (economic, social and environmental. According to the results of SAW method, it can be noted that when a country is improving economic indicators, environmental indicators usually decrease, which in turn determines the characteristics of the social dimension slight decrease.

  3. An easy method for diagnosing macro-aspartate aminotransferase: a case series.

    Science.gov (United States)

    Beşer, Omer Faruk; Laçinel, Sibel; Gülcü, Didem; Kutlu, Tufan; Cullu Çokuğraş, Fügen; Erkan, Tülay

    2014-10-01

    Macro-aspartate transaminase (macro-AST) must be considered when the aspartate transaminase (AST) level is chronically high without any liver, cardiac, or muscle disease. Many specialized laboratory techniques have been recommended for diagnosing macro-AST, including the polyethylene glycol immune precipitate technique, which is simple. This study presents a considerably easier method based on the studies of Davidson and Watson and Castiella et al. Our method is based on the decrease in the plasma AST level after storage of the macroenzyme at 2-8 °C for 5 days, and has the advantages of low cost, reliability, and practicality at any health center. In our eight cases of macro-AST, the AST activity at day 6 had decreased by more than 50% from day 1. This method is practical for primary healthcare facilities because of its easy application and accurate results, and obviated the need for unnecessary tests after diagnosis.

  4. Exergy of LNG regasification - possible utilization method. Case study of LNG - ANG coupling

    Science.gov (United States)

    Roszak, E. A.; Chorowski, M.

    2014-01-01

    This article gives an overview on new exergy recovery methods for LNG. The concept is based on coupling the LNG regasification unit with the filling process of Adsorbed Natural Gas (ANG) tanks. The latent heat of the LNG vaporization is directly used for precooling the ANG adsorption bed. This reduces the back pressure from filling ANG tanks due to strong adsorption temperature dependency. This improves the economic attractiveness of ANG storage (no need for compressors, longer lifetime cycle of adsorbent). This case study presents the concept of LNG - ANG coupling. Presented results are based on experimental adsorption data. A brief exergy analysis of the process shows an advantage of this method over others. This LNG-ANG method is worth consideration as a cost optimizing solution, especially for periodically working regasification stations.

  5. Calculating time since death in a mock crime case comparing a new computational method (ExLAC) with the ADH method.

    Science.gov (United States)

    Reibe-Pal, Saskia; Madea, Burkhard

    2015-03-01

    We compared the results of calculating a minimum post-mortem interval (PMImin) in a mock crime case using two different methods: accumulated degree hours (ADH method) and a newly developed computational model called ExLAC. For the ADH method we further applied five reference datasets for the development time of Calliphora vicina (Diptera: Calliphoridae) from 5 different countries and our results confirmed the following: (1) Reference data for blowfly development that has not been sampled using a local blowfly colony should not, in most circumstances, be used in estimating a PMI in real cases; and (2) The new method ExLAC might be a potential alternative to the ADH method.

  6. Nose and Midface Augmentation by Rib Cartilage Grafts: Methods and Outcome in 32 Cases

    Directory of Open Access Journals (Sweden)

    Adham Farouk

    2015-01-01

    Full Text Available Recession of the midface is a relatively common condition that can have a negative impact on facial and nasal aesthetic appearance, and it poses a challenge to plastic surgeons. In cases with generalized maxillary retrusion and/or malocclusion, bone advancement surgery is required, but in localized cases, mostly seen in cleft lip patients, the quest is for an ideal material and a proper technique that would be used to augment the receding area. Throughout a period of seven years, thirty-two patients with nose and midface retrusion were managed by a construct of rib cartilage grafts designed to compensate the deficiency at the maxillary, piriform, and premaxillary areas. Results were satisfactory for most patients in terms of improved fullness of malar area, improved nasal tip projection and rotation, and improvement of upper lip. The presented technique of rib cartilage grafting is a safe and effective method for nose and midface augmentation.

  7. Treatment of 38 Cases of Sudden Deafness by Acupuncture plus Acupoint-injecting Method

    Institute of Scientific and Technical Information of China (English)

    CHEN Jie; HUANG Guo-qi

    2005-01-01

    采用针刺耳门、听宫、听会、翳风、中渚、三阴交和太溪等穴位,配合穴位注射隔日交替治疗的方法治疗突发性耳聋38例,并与常规西药治疗30例对照,结果两组总有效率分别为89.5%和66.6%.%In the treatment of 38 cases of sudden deafness by puncturing Ermen (TE 21),Tinggong (SI 19), Tinghui (GB 2), Yifeng (TE 17), Zhongzhu (TE 3), Sanyinjiao (SP 6) and Taixi (KI 3), in combination of acupoint-injecting method every second day in alternation,together in comparison with 30 cases in the treatment of routine western medications, the total effective rate was respectively 89.5% and 66.6% in the two groups.

  8. The ethnographically contextualized case study method: exploring ambitious achievement in an American Indian community.

    Science.gov (United States)

    Gone, Joseph P; Alcántara, Carmela

    2010-04-01

    This article demonstrates the empirical viability of the Ethnographically Contextualized Case Study Method (ECCSM) for investigating interrelationships between cultural and psychological processes. By juxtaposing two relevant forms of data--original interview material from a single respondent and existing ethnographic evidence--the inherent idiographic limitations of the case study approach for pursuing the psychological study of culture might be transcended. Adoption of the ECCSM for the exploration of cultural ideals among an elderly Native American respondent revealed both the personal and cultural significance of ambitious achievement within this tribal community, calling into question the conventional wisdom within multicultural psychology that Native Americans are culturally disposed to passive, submissive and noncompetitive psychological orientations. This application of the proposed methodology demonstrates how important empirical insights may be obtained in unusually efficient and nuanced ways at the confluence of culture and psychology.

  9. Congenital pseudarthrosis of lower leg treated by almost outdated method: Case report

    Directory of Open Access Journals (Sweden)

    Vukašinović Zoran

    2014-01-01

    Full Text Available Introduction. Congenital pseudarthrosis of tibia is a rare congenital deformity with progressive evolution. Treatment is vague and difficult, and many methods have been used - from once mandatory early amputation to contemporary operative (Ilizarov method, free microvascular fibular graft and adjuvant methods (electrostimulation, biphosphonates, bone morphogenetic protein. We present the usage of once popular method of homologous graft insertion and intramedullary fixation. Case Outline. This is a case report of male patient with pseudarthrosis involving both crural bones (Boyd type 5, diagnosed in neonatal age. Early conservative treatment was unsuccessful, so child never initiated gait. At the age of three and a half years, operative treatment was applied: resection of pseudarthrosis on both tibia and fibula, and osteoplasty of tibia using cylindric homologous graft and intramedullary fixation with transtarsal Steinman pin, followed by long leg cast immobilization. Pin was removed after ten months, and physical therapy was initiated 1.5 year after surgery, with initial to partial weight bearing and short leg cast throughout another year. Two and a half years after surgery complete union of graft was documented, and then full weight bearing was allowed. At final visit, five years and three months after surgery, shin axis was correct, leg lengths were equal, and child had normal walk with full range of motion. X-ray showed complete union of both tibia and fibula. Conclusion. Despite bad prognostic factors (young age, severe deformity, utilization of obsolete and almost forgotten treatment methods can provide excellent result. [Projekat Ministarstva nauke Republike Srbije, br. III 41004

  10. Modelling migration in multilayer systems by a finite difference method: the spherical symmetry case

    Science.gov (United States)

    Hojbotǎ, C. I.; Toşa, V.; Mercea, P. V.

    2013-08-01

    We present a numerical model based on finite differences to solve the problem of chemical impurity migration within a multilayer spherical system. Migration here means diffusion of chemical species in conditions of concentration partitioning at layer interfaces due to different solubilities of the migrant in different layers. We detail here the numerical model and discuss the results of its implementation. To validate the method we compare it with cases where an analytic solution exists. We also present an application of our model to a practical problem in which we compute the migration of caprolactam from the packaging multilayer foil into the food.

  11. Case histories portraying different methods of installing liners for verticle barriers

    Energy Technology Data Exchange (ETDEWEB)

    Burke, G.K. [Hayward Baker Inc., Odenton, MD (United States); Crockford, R.M. [Keller Colcrete Ltd., Wetherby, West Yorkshire (United Kingdom); Achhorner, F.N. [Slurry Walls, Inc., Irving, TX (United States)

    1997-12-31

    The installation of liners for vertical barriers is difficult and has been a learning experience for every contractor making the attempt. Soil stratigraphy and hydrogeologic conditions can vary over short distances, creating a variety of problems. This is particularly so when working near landfills and documentation of the as-built condition is poor. Successful installation requires detailed planning and knowledge of what to expect, as well as alternate plans for potential problems. Several successful methods of panel connection will be presented as well as a variety of installation techniques. Project case histories will be reviewed, highlighting the challenges associated with specific construction techniques.

  12. Whitham's Method and Dubrovin-Novikov Bracket in Single-Phase and Multiphase Cases

    Directory of Open Access Journals (Sweden)

    Andrei Ya. Maltsev

    2012-12-01

    Full Text Available In this paper we examine in detail the procedure of averaging of the local field-theoretic Poisson brackets proposed by B.A. Dubrovin and S.P. Novikov for the method of Whitham. The main attention is paid to the questions of justification and the conditions of applicability of the Dubrovin-Novikov procedure. Separate consideration is given to special features of single-phase and multiphase cases. In particular, one of the main results is the insensitivity of the procedure of bracket averaging to the appearance of ''resonances'' which can arise in the multi-phase situation.

  13. Treatment of 40 Cases of Chronic Fatigue Syndrome by Cupping Method

    Institute of Scientific and Technical Information of China (English)

    张水臣

    2009-01-01

    @@ Chronic fatigue syndrome (CFS) refers to a group of main manifestations characterized by chronic or recurrent severe fatigue,accompanied by headache,sore throat,muscular and joint pain,insomnia and multiple nervous and psychological symptoms,but without other chronic organic diseases and mental disorders.In 1987,it was termed formally by the United States Centers for Diseases Control.Currently,the etiology and pathogenesis of CFS are still unknown,and there is effective medication for it.The author has treated 40 cases of this syndrome by applying cupping method on Back-Shu points since 2005.Now,the report is given as follows.

  14. Research and technology management in the electricity industry methods, tools and case studies

    CERN Document Server

    Daim, Tugrul; Kim, Jisun

    2013-01-01

    Technologies such as renewable energy alternatives including wind, solar and biomass, storage technologies and electric engines are creating a different landscape for the  electricity industry. Using sources and ideas from technologies such as renewable energy alternatives, Research and Technology Management in the Electricity Industry explores a different landscape for this industry and applies it to the electric industry supported by real industry cases. Divided into three sections, Research and Technology Management in the Electricity Industry introduces a range of  methods and tools includ

  15. Fatigue life prediction of casing welded pipes by using the extended finite element method

    OpenAIRE

    2016-01-01

    The extended finite element (XFEM) method has been used to simulate fatigue crack growth in casing pipe, made of API J55 steel by high-frequency welding, in order estimate its structural integrity and life. Based on the critical value of stress intensity factor KIc, measured in different regions of welded joint, the crack was located in the base metal as the region with the lowest resistance to crack initiation and propagation. The XFEM was first applied to the 3 point bending specimens to...

  16. The Keyimage Method of Learning Sound-Symbol Correspondences: A Case Study of Learning Written Khmer

    Directory of Open Access Journals (Sweden)

    Elizabeth Lavolette

    2009-01-01

    Full Text Available I documented my strategies for learning sound-symbol correspondences during a Khmer course. I used a mnemonic strategy that I call the keyimage method. In this method, a character evokes an image (the keyimage, which evokes the corresponding sound. For example, the keyimage for the character 2 could be a swan with its head tucked in. This evokes the sound "kaw" that a swan makes, which sounds similar to the Khmer sound corresponding to 2. The method has some similarities to the keyword method. Considering the results of keyword studies, I hypothesize that the keyimage method is more effective than rote learning and that peer-generated keyimages are more effective than researcher- or teacher-generated keyimages, which are more effective than learner-generated ones. In Dr. Andrew Cohen's plenary presentation at the Hawaii TESOL 2007 conference, he mentioned that more case studies are needed on learning strategies (LSs. One reason to study LSs is that what learners do with input to produce output is unclear, and knowing what strategies learners use may help us understand that process (Dornyei, 2005, p. 170. Hopefully, we can use that knowledge to improve language learning, perhaps by teaching learners to use the strategies that we find. With that in mind, I have examined the LSs that I used in studying Khmer as a foreign language, focusing on learning the syllabic alphabet.

  17. Effect of arousal methods for 175 cases of prolonged coma and its factors after severe traumatic brain injury

    Institute of Scientific and Technical Information of China (English)

    江基尧; 包映晖; 殷玉华; 潘耀华; 梁玉敏; 罗其中

    2004-01-01

    Objective: To determine the effect of arousal methods for prolonged coma of 175 patients with severe traumatic brain injury and related factors.Methods: There were 175 cases with persistent coma longer than 1 month after severe traumatic brain injury. Coma lasted 1-12 months. Arousal procedures included hyperbaric oxygen, physical therapy and arousal drugs. Results: In the 175 prolonged coma patients 110 got recovery of consciousness; in 118 cases with coma of 1-3 months, 86 cases recovered consciousness (72.9%); in 42 cases with coma of 4-6 months, 20 cases recovered consciousness (47.6);and in 15 cases with coma of longer than 6 months, only 4 cases recovered consciousness (26.7%). The recovery of consciousness depended on patient's primary brain stem damagme, cerebral hernia, GCS score, and age .Conclusions: Application of appropriate arousal procedures improves recovery of consciousness in patients with prolonged coma.

  18. Treatment of 28 Cases of Post-herpetic Neuralgia by Local Encircled Needling Method

    Institute of Scientific and Technical Information of China (English)

    孙远征; 马劲云

    2006-01-01

    According to the affected area, 28 patients with herpes zoster were treated. Electroacupuncture and local encircled needling method were used for the patient with the affected head and Jiaji (Ex-B 2) on the same side of pathological changes was added to puncture for the patient with the affected chest and waist. Visual analogue scale (VAS) was used to assess analgesic effect. The result showed VAS<2 in 19 cases, VAS<5 in 7 cases and VAS>6 in 2 cases.%根据病变部位,在头部者采用电针法局部围刺,在胸腰部者,除采用电针法局部围刺外,还可针刺病变同侧部位的夹脊穴,治疗了28例带状疱疹患者.采用视觉模拟尺(Visual Analogue Scale, VAS)评价止痛效果,结果19例患者VAS<2,7例VAS<5,2例VAS>6.

  19. Application of the lifting line vortex wake method to dynamic load case simulations

    Science.gov (United States)

    Boorsma, K.; Hartvelt, M.; Orsi, L. M.

    2016-09-01

    Within the EU AVATAR project, the added benefit of using the vortex line method is researched by calculating aero-elastic response for a variety of IEC load cases. A comparison is made to BEM to identify differences. Results are presented for yawed flow, extreme transient shear, half wake and turbulent inflow conditions. In addition to that also a dynamic pitch step case is performed including a comparison to experimental data. The aerodynamic code used for this purpose allows to easily switch between BEM and vortex line models whilst keeping the external input the same. The comparison indicates that taking into account vortex wake models can yield a significantly different aero-elastic response compared to BEM models, often acting as a damper to fluctuations. As such estimated fatigue loads are reduced for selected load cases. Since the free vortex wake simulations come at a substantial increase of CPU-time, a hybrid approach prescribing the far wake is shown to offer a promising compromise.

  20. A test case of the deformation rate analysis (DRA) stress measurement method

    Energy Technology Data Exchange (ETDEWEB)

    Dight, P.; Hsieh, A. [Australian Centre for Geomechanics, Univ. of WA, Crawley (Australia); Johansson, E. [Saanio and Riekkola Oy, Helsinki (Finland); Hudson, J.A. [Rock Engineering Consultants (United Kingdom); Kemppainen, K.

    2012-01-15

    As part of Posiva's site and ONKALO investigations, the in situ rock stress has been measured by a variety of techniques, including hydraulic fracturing, overcoring, and convergence measurements. All these techniques involve direct measurements in a drillhole or at the rock surface. An alternative method is to test drillhole core in a way that enables estimation of the magnitudes and orientations of the in situ rock stress. The Kaiser Effect (KE) and Deformation Rate Analysis (DRA) are two ways to do this. In the work reported here, a 'blind' DRA test was conducted on core obtained from the POSE (Posiva's Olkiluoto Spalling Experiment) niche in the ONKALO. The term 'blind' means that the two first authors of this report, who conducted the tests at the Australian Centre for Geomechanics, did not know the depths below surface at which the cores had been obtained. The results of this DRA Test Case are presented, together with an explanation of the DRA procedure. Also, additional information that would help in such DRA testing and associated analysis is explained. One of the problems in comparing the DRA results with the known Olkiluoto stress field is that the latter is highly variable across the site, as experienced by the previous in situ stress measurements and as predicted by numerical analysis. The variability is mainly caused by the presence of the large brittle deformation zones which perturb the local stress state. However, this variability reduces with depth and the stress field becomes more stable at the {approx} 350 m at which the drillhole cores were obtained. Another compounding difficulty is that the stress quantity, being a second order tensor, requires six independent components for its specification. In other words, comparison of the DRA results and the known stress field requires comparison of six different quantities. In terms of the major principal stress orientation, the DRA results predict an orientation completely

  1. Spatial temporal clustering for hotspot using kulldorff scan statistic method (KSS): A case in Riau Province

    Science.gov (United States)

    Hudjimartsu, S. A.; Djatna, T.; Ambarwari, A.; Apriliantono

    2017-01-01

    The forest fires in Indonesia occurs frequently in the dry season. Almost all the causes of forest fires are caused by the human activity itself. The impact of forest fires is the loss of biodiversity, pollution hazard and harm the economy of surrounding communities. To prevent fires required the method, one of them with spatial temporal clustering. Spatial temporal clustering formed grouping data so that the results of these groupings can be used as initial information on fire prevention. To analyze the fires, used hotspot data as early indicator of fire spot. Hotspot data consists of spatial and temporal dimensions can be processed using the Spatial Temporal Clustering with Kulldorff Scan Statistic (KSS). The result of this research is to the effectiveness of KSS method to cluster spatial hotspot in a case within Riau Province and produces two types of clusters, most cluster and secondary cluster. This cluster can be used as an early fire warning information.

  2. Fanweed toxicosis in cattle: case history, analytical method, suggested treatment, and fanweed detoxification.

    Science.gov (United States)

    Smith, R A; Crowe, S P

    1987-04-01

    Two hundred and twenty head of pregnant cows were fed virtually 100% fanweed (Thlaspi arvense) in November 1984. One hundred became distressed and colicy within 4 hr of feeding. Eight died over the next 5 days despite removal of the feed and symptomatic treatment. Necropsy revealed massive submucosal edema of the wall of the forestomachs, particularly the rumen. Four abortions occurred. The feed was analyzed and was found to liberate 250 mg/100g of AITC. Possible methods of treatment were devised in case the problem should recur. Fanweed contains sinigrin and the enzyme myrosin. When the plant is crushed and moistened, allylisothiocyanate (AITC) is formed along with glucose and potassium acid sulfate. Application of Le Chatelier's principle led to an investigation of the effect of pH on in vitro generation of AITC. Methods of destroying AITC were also examined, and detoxification studies were undertaken on fanweed.

  3. REQUIREMENT ANALYSIS METHOD OF ECOMMERCE WEBSITES DEVELOPMENT FOR SMALLMEDIUM ENTERPRISES, CASE STUDY: INDONESIA

    Directory of Open Access Journals (Sweden)

    Veronica S. Moertini

    2014-03-01

    Full Text Available Along with the growth of the Internet, the trend shows that e-commerce have been growing significantly in the last several years. This means business opportunities for small-medium enterprises (SMEs, which are recognized as the backbone of the economy. SMEs may develop and run small to medium size of particular e-commerce websites as the solution of specific business opportunities. Certainly, the websites should be developed accordingly to support business success. In developing the websites, key elements of e-commerce business model that are necessary to ensure the success should be resolved at the requirement stage of the development. In this paper, we propose an enhancement of requirement analysis method found in literatures such that it includes activities to resolve the key elements. The method has been applied in three case studies based on Indonesia situations and we conclude that it is suitable to be adopted by SMEs.

  4. Knowledge acquisition method for case-knowledge-based product family design

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Knowledge acquisition has always been the bottleneck of artificial intelligence. It is the critical point in product family design. Here a knowledge acquisition method was introduced based on scenario model and repository grid and attribute ordering table technology. This method acquired knowledge through providing product design cases to expert, and recording the means and knowledge used by the expert to describe and resolve problems. It used object to express design entity, used scenario to describe the design process, used Event-Condition-Action (ECA) rule to drive design process, and with the help of repository grid and attribute ordering table technology to acquire design knowledge. It's a good way to capture explicit and implicit knowledge. And its validity is proved with respective examples.

  5. Clinical Observations on 30 Cases of Chronic Simple Pharyngitis Treated by Acupuncture plus Cupping Method

    Institute of Scientific and Technical Information of China (English)

    程玲; 张春燕; 甘志豪

    2006-01-01

    Objective:In order to investigate the clinical efficacy of acupuncture plus cupping method for treating chronic pharyngitis. Methods: Sixty patients with chronic simple pharyngitis were randomly divided into two groups. Thirty cases in the treatment group were treated by acupuncture plus cupping method and 30 cases in the control group by routine anti-inflammatory and antiviral therapy. The clinical effects were observed in the two groups. Results: The total effective rate was 93.3% in the treatment group and 80.0% in the control group. The therapeutic effect was significantly better in the treatment group than in the control group (P<0.05). Conclusion: Acupuncture plus cupping method has a good effect for chronic simple pharyngitis.%目的:观察针刺加拔罐治疗慢性咽炎的临床疗效.方法:将慢性咽炎患者60例随机分为两组,治疗组30例,采用针罐治疗;对照组30例,采用常规的抗炎、抗病毒治疗.观察两组的临床疗效.结果:治疗组总有效28/30,对照组为24/30.治疗组疗效明显优于对照组(P《0.05).结论:针刺加拔罐治疗慢性咽炎的疗效好.

  6. Correction of steel casing effect for density log using numerical and experimental methods in the slim borehole

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, Seho; Shin, Jehyun; Kim, Jongman [Korea Institute of Geoscience and Mineral Resources, 124 Gwahang-no Yuseong-gu, Daejeon, Republic of Korea, 305-350 (Korea, Republic of); Won, Byeongho [Heesong Geotek Co. Ltd., B-120 UrymLionsValley A-Building, 146-8 Sangdaewondong, Chungwongu, Seongnam City, Gyeonggi-do, Republic of Korea, 462-807 (Korea, Republic of)

    2015-03-10

    Density log is widely applied for a variety of fields such as the petroleum exploration, mineral exploration, and geotechnical survey. The logging condition of density log is normally open holes but there are frequently cased boreholes. The primary calibration curve by slim hole logging manufacturer is normally the calibration curves for the variation of borehole diameter. In this study, we have performed the correction of steel casing effects using numerical and experimental methods. We have performed numerical modeling using the Monte Carlo N-Particle (MCNP) code based on Monte Carlo method, and field experimental method from open and cased hole log. In this study, we used the FDGS (Formation Density Gamma Sonde) for slim borehole with a 100 mCi 137Cs source, three inch borehole and steel casing. The casing effect between numerical and experimental method is well matched.

  7. A method for under-sampled ecological network data analysis: plant-pollination as case study

    Directory of Open Access Journals (Sweden)

    Peter B. Sorensen

    2012-01-01

    Full Text Available In this paper, we develop a method, termed the Interaction Distribution (ID method, for analysis of quantitative ecological network data. In many cases, quantitative network data sets are under-sampled, i.e. many interactions are poorly sampled or remain unobserved. Hence, the output of statistical analyses may fail to differentiate between patterns that are statistical artefacts and those which are real characteristics of ecological networks. The ID method can support assessment and inference of under-sampled ecological network data. In the current paper, we illustrate and discuss the ID method based on the properties of plant-animal pollination data sets of flower visitation frequencies. However, the ID method may be applied to other types of ecological networks. The method can supplement existing network analyses based on two definitions of the underlying probabilities for each combination of pollinator and plant species: (1, pi,j: the probability for a visit made by the i’th pollinator species to take place on the j’th plant species; (2, qi,j: the probability for a visit received by the j’th plant species to be made by the i’th pollinator. The method applies the Dirichlet distribution to estimate these two probabilities, based on a given empirical data set. The estimated mean values for pi,j and qi,j reflect the relative differences between recorded numbers of visits for different pollinator and plant species, and the estimated uncertainty of pi,j and qi,j decreases with higher numbers of recorded visits.

  8. Treatment of septic pseudoarthrosis of tibia by Ilizarov method: Case report

    Directory of Open Access Journals (Sweden)

    Šešlija Igor

    2010-01-01

    Full Text Available Introduction. Septic pseudoarthroses of the tibia represent a relatively frequent complication of open fractures with a large soft tissue damage. They may be localized: in the proximal metaphysis, between the proximal and middle thirds, between middle and distal thirds, in the distal metaphysis. Case Outline. A case of a 52-year-old man with open fracture of the left tibia is presented. He fell from the height of 30 meters. The external fixation according to Mitkovic was performed in another institution. The patient was referred to our hospital nine months after the accident, with clear clinical and radiological signs of septic pseudoarthrosis of the tibia. The resection of septic pseudoarthrosis was done two weeks after admission. Three weeks later, another operation was performed, bilocal alternating distractive-compressive osteosynthesis according to Ilizarov. After eleven months Ilizarov frame was removed, with clinical, radiological signs of healing of pseudoarthrosis and complete curing of the infection. Five months after removal of the frame, the patient was fully anatomically and functionally recovered. Conclusion. Being satisfied with the achieved results and encouraged with the data from the literature, we recommend this method as the method of choice for the treatment of pseudoarthrosis of the tibia. The advantage consists of curing the infection using the natural bactericide power of the tissue and curing the bone defect, at the same time, and finally, producing the equalization of the legs.

  9. CC-Case as an Integrated Method of Security Analysis and Assurance over Life-cycle Process

    Directory of Open Access Journals (Sweden)

    Tomoko Kaneko

    2015-05-01

    Full Text Available Secure system design faces many risks such as information leakage and denial of service. We propose a method named CC-Case to describe se-curity assurance cases based on the security struc-tures and thereat analysis. CC-Case uses Common Criteria (ISO/IEC15408. While the scope of CC-Case mainly focuses to the requirement stage, CC-Case can handle the life-cycle process of sys-tem design that contains the requirement, design, implementation, test and the maintenance stages. It can make countermeasure easily against the situation which an unexpected new threat produced by invisible attackers incessantly.

  10. Methods for Estimating Environmental Effects and Constraints on NexGen: High Density Case Study

    Science.gov (United States)

    Augustine, S.; Ermatinger, C.; Graham, M.; Thompson, T.

    2010-01-01

    This document provides a summary of the current methods developed by Metron Aviation for the estimate of environmental effects and constraints on the Next Generation Air Transportation System (NextGen). This body of work incorporates many of the key elements necessary to achieve such an estimate. Each section contains the background and motivation for the technical elements of the work, a description of the methods used, and possible next steps. The current methods described in this document were selected in an attempt to provide a good balance between accuracy and fairly rapid turn around times to best advance Joint Planning and Development Office (JPDO) System Modeling and Analysis Division (SMAD) objectives while also supporting the needs of the JPDO Environmental Working Group (EWG). In particular this document describes methods applied to support the High Density (HD) Case Study performed during the spring of 2008. A reference day (in 2006) is modeled to describe current system capabilities while the future demand is applied to multiple alternatives to analyze system performance. The major variables in the alternatives are operational/procedural capabilities for airport, terminal, and en route airspace along with projected improvements to airframe, engine and navigational equipment.

  11. Steel Casing Resistivity Technology (SCRT): Innovative Applications of Electrical Methods for Buried Tank Leak Detection

    Science.gov (United States)

    Fink, J. B.; Levitt, M. T.; Gee, G. W.

    2002-12-01

    The need for non-invasive leak detection methods is extremely important for monitoring cleanup efforts of nuclear waste contained in underground storage tanks at the Hanford Nuclear Facility in Washington. Drilling is both very expensive and undesirable in the tank farms. Various geophysical imaging methods were evaluated over the past two years at two "cold" sites but within geologic conditions similar to the tank farms. The "cold" sites consisted of 1. a dense array of 32 steel casings, and 2. a "mock tank" in which various controlled leaks (injections) of a saturated aqueous solution of Na2S2O35H20 were metered. Nearly all methods required invasive drilling for subsurface placement of sensors. An innovative direct-current electrical method using existing infrastructure as grounding electrodes, such as steel casings and steel tanks, has shown very promising results and is undergoing further testing. The most useful results have been obtained by using multiple grounding points for spatial determinations and continuous time-series monitoring for temporal variations. Although the large size of tanks and lengths of casings make discrete volume estimations difficult, data acquired for test leaks to date have shown a surprising correlation between leak rates and the rate-of-change of specific electrical measurements. First order volume approximations can be made based on existing knowledge of the geologic environment and hydraulic parameters. Spatial data provide general leak location and gross flow characteristics, whereas temporal data indicate test leak commencement, cessation, and approximate leak rates. On-going testing is providing quantitative calibration information that is expected to transfer to the tank farm environments. Procedures are being developed that will simplify the installation and operation of the system in the tank-farm environments. Implementation of the technology necessitated remote operation and monitoring of the electrical system

  12. Intercomparison of regional flood frequency estimation methods at ungauged sites for a Mexican case study

    Science.gov (United States)

    Ouarda, T. B. M. J.; Bâ, K. M.; Diaz-Delgado, C.; Cârsteanu, A.; Chokmani, K.; Gingras, H.; Quentin, E.; Trujillo, E.; Bobée, B.

    2008-01-01

    SummaryThis paper presents an adaptation of some regional estimation approaches to tropical climates and a comparison of their performance on the basis of their application to data from the Balsas, Lerma and Pánuco River Basins located in Mexico. Four approaches are used in this study for the delineation of homogeneous regions: The first one is the hierarchical cluster analysis approach which leads to fixed hydrologic regions. The second one is the canonical correlation analysis (CCA) which allows the determination of hydrologic neighborhoods that are specific to the site of interest. The third one is a revised version of the canonical correlation analysis approach that is free of parameter optimization and which can be automated easily. Finally, the fourth one is the technique of canonical kriging which consists in interpolating hydrological variables over the canonical physiographical space. The methods based on the canonical correlation analysis approach provide also the basis for identifying the explanatory variables to be used during the step of regional estimation. Regional estimation is carried out based on a multiple regression approach. A data set of 29 stations from several Mexican River Basins in and around the Balsas region is used to show the advantages and weaknesses of each method and to demonstrate their usefulness in the context of regional flood quantile estimation. This study allows also to test the robustness of these methods through their application to a real world case study with a relatively limited number of stations. While all methods performed quite adequately, results indicate clearly the advantages of the neighborhood type of approach and the superiority of the canonical correlation analysis based methods. Results demonstrate that CCA-based methods lead to best performances overall. While hierarchical clustering seems generally to lead to less biased quantile estimates, the lowest root mean square error values are almost consistently

  13. Method of calculating pilestrip foundations in case of karst hole formation

    Directory of Open Access Journals (Sweden)

    Gotman Al'fred Leonidovich

    2014-02-01

    Full Text Available The paper presents pile strip foundations in the areas with karst risk. The analysis of karst hole formation mechanism shows the lateral soil pressure on the piles caused by the downfallen soil on the hole rims, which transfers around the hole edges during karst hole formation. In this case, the horizontal pressure of the pile reactive force in the area of the pile connection with the raft is transferred to the raft. Pile failure at the hole boundaries will lead to the increase of the raft bearing distance above the karst hole. The inadequate raft bearing capacity can provoke the emergency situation. The existing Codes on karst protective foundations design do not contain the analysis of pile and raft horizontal pressure under the downfallen soil.The goal of this work is to develop the method of pile strip foundations analysis in the areas with karst risk in case of karst hole formation. The analysis of stress-strain state of the system “foundation soil — pile foundation” was carried out using numerical modeling in geotechnical program MIDAS GTS. As a result of numerical investigations, the diagrams of lateral soil pressure onto the piles and the raft are plotted. The pile pressure is approximated with the linear or bilinear function in dependence on geometrical dimensions of the karst hole and strength characteristics of soil that generates the horizontal pressure.In the Codes, the analysis of a pile under lateral soil pressure is given for a pile with the free end. In the problem examined, the pile head has the hinged bearing in place of the connection with the raft. In view of the given boundary data, the pile design scheme is plotted. The inner forces and displacements of the pile are determined by integrating the differential equation of a pile bending. The consistent integrations are evaluated out of the boundary conditions. The boundary values of inner forces and displacements are evaluated from the equality conditions of

  14. A method for optimizing waste collection using mathematical programming: a Buenos Aires case study.

    Science.gov (United States)

    Bonomo, Flavio; Durán, Guillermo; Larumbe, Frederico; Marenco, Javier

    2012-03-01

    A method is proposed that uses operations research techniques to optimize the routes of waste collection vehicles servicing dumpster or skip-type containers. The waste collection problem is reduced to the classic travelling salesman problem, which is then solved using the Concorde solver program. A case study applying the method to the collection system in the southern zone of Buenos Aires is also presented. In addition to the typical minimum distance criterion, the optimization problem incorporates the objective of reducing vehicle wear and tear as measured by the physics concept of mechanical work. The solution approach, employing graph theory and mathematical programming tools, is fully described and the data correction process is also discussed. The application of the proposed method minimized the distance travelled by each collection vehicle in the areas studied, with actual reductions ranging from 10 to 40% of the existing routes. The shortened distances led in turn to substantial decreases in work done and therefore in vehicle wear and tear. Extrapolation of the results to the entire southern zone of Buenos Aires indicates potential savings for the civic authorities of more than US $200,000 per year in addition to the qualitative impacts of less traffic disruption, less vehicle driver fatigue and less pollution.

  15. Estimation and Control in Agile Methods for Software Development: a Case Study

    Directory of Open Access Journals (Sweden)

    Mitre-Hernández Hugo A.

    2014-07-01

    Full Text Available The development of software (SW using agile methods is growing due to the productivity associated with these methodologies, in addition to the flexibility shown in small teams. However, these methods have clear weaknesses of software development in cost estimation and management, as well as the fact that project managers do not have enough evidence to verify the budget spending on a project due to the poor documentation generated and the lack of monitoring of resource spending. A proposal estimation and cost control in agile methods to solve these shortcomings. To this end, a case study was conducted in an agile software development company using the proposal for Software as a Service (SaaS and Web application projects. The results found were that the proposal generates a high degree of evidence for project managers, but it has shortcomings in the administration of the evidence for the control and decision making, which led to a definition of a decision making process to be coupled with the measurement proposal.

  16. Applying clustering approach in predictive uncertainty estimation: a case study with the UNEEC method

    Science.gov (United States)

    Dogulu, Nilay; Solomatine, Dimitri; Lal Shrestha, Durga

    2014-05-01

    Within the context of flood forecasting, assessment of predictive uncertainty has become a necessity for most of the modelling studies in operational hydrology. There are several uncertainty analysis and/or prediction methods available in the literature; however, most of them rely on normality and homoscedasticity assumptions for model residuals occurring in reproducing the observed data. This study focuses on a statistical method analyzing model residuals without having any assumptions and based on a clustering approach: Uncertainty Estimation based on local Errors and Clustering (UNEEC). The aim of this work is to provide a comprehensive evaluation of the UNEEC method's performance in view of clustering approach employed within its methodology. This is done by analyzing normality of model residuals and comparing uncertainty analysis results (for 50% and 90% confidence level) with those obtained from uniform interval and quantile regression methods. An important part of the basis by which the methods are compared is analysis of data clusters representing different hydrometeorological conditions. The validation measures used are PICP, MPI, ARIL and NUE where necessary. A new validation measure linking prediction interval to the (hydrological) model quality - weighted mean prediction interval (WMPI) - is also proposed for comparing the methods more effectively. The case study is Brue catchment, located in the South West of England. A different parametrization of the method than its previous application in Shrestha and Solomatine (2008) is used, i.e. past error values in addition to discharge and effective rainfall is considered. The results show that UNEEC's notable characteristic in its methodology, i.e. applying clustering to data of predictors upon which catchment behaviour information is encapsulated, contributes increased accuracy of the method's results for varying flow conditions. Besides, classifying data so that extreme flow events are individually

  17. Simulation of sound waves using the Lattice Boltzmann Method for fluid flow: Benchmark cases for outdoor sound propagation

    NARCIS (Netherlands)

    Salomons, E.M.; Lohman, W.J.A.; Zhou, H.

    2016-01-01

    Propagation of sound waves in air can be considered as a special case of fluid dynamics. Consequently, the lattice Boltzmann method (LBM) for fluid flow can be used for simulating sound propagation. In this article application of the LBM to sound propagation is illustrated for various cases: free-fi

  18. Teaching with the Case Study Method to Promote Active Learning in a Small Molecule Crystallography Course for Chemistry Students

    Science.gov (United States)

    Campbell, Michael G.; Powers, Tamara M.; Zheng, Shao-Liang

    2016-01-01

    Implementing the case study method in a practical X-ray crystallography course designed for graduate or upper-level undergraduate chemistry students is described. Compared with a traditional lecture format, assigning small groups of students to examine literature case studies encourages more active engagement with the course material and…

  19. Cases on Successful E-Learning Practices in the Developed and Developing World: Methods for the Global Information Economy

    Science.gov (United States)

    Olaniran, Bolanle A., Ed.

    2010-01-01

    E-learning has become a significant aspect of training and education in the worldwide information economy as an attempt to create and facilitate a competent global work force. "Cases on Successful E-Learning Practices in the Developed and Developing World: Methods for the Global Information Economy" provides eclectic accounts of case studies in…

  20. Inter-observer agreement according to three methods of evaluating mammographic density and parenchymal pattern in a case control study

    DEFF Research Database (Denmark)

    Winkel, Rikke Rass; von Euler-Chelpin, My Catarina; Nielsen, Mads;

    2015-01-01

    impact reproducibility has on relative risk estimates of breast cancer. METHODS: This retrospective case-control study included 122 cases and 262 age- and time matched controls (765 breasts) based on a 2007 screening cohort of 14,736 women with negative screening mammograms from Bispebjerg Hospital...

  1. CASE STUDY OF THE OPTIMIZING THE AUTOMOTIVE MANUFACTURING SYSTEMS EFFICIENCY VIA APPLYING NEW METHOD OF SCHEDULING

    Directory of Open Access Journals (Sweden)

    Seyedehfarzaneh Nojabaei

    2014-01-01

    Full Text Available Efficiency is becoming a pivotal aspect in each manufacturing system and scheduling plays a crucial role in sustaining it. The applicability of distributed computing to coordinate and execute jobs has been investigated in the past literature. Moreover, it is significant that even for sensitive industrial systems the only criterion of allocating jobs to appropriate machines is the FIFO policy. On the other flip, many researchers are of the opinion that the main reason behind failing to provide fairness in distributed systems is considering the only criterion of time stamp to judge upon and form the queue of jobs with the aim of allocating those jobs to the machines. In order to increase the efficiency of sensitive industrial system, this study takes into consideration of three criteria of each job including priority, time action and time stamp. The methodology adopted by this study is definition of job scheduler and positioning jobs in temporary queue and sorting via developing bubble sort. In sorting algorithm criterion of priority, time action should be considered besides time stamp to recognize the tense jobs for processing earlier. To evaluate this algorithm first a numerical test case (simulation is programmed and then the case study performing in order to optimize efficiency of applying this method in real manufacturing system. Eventually the results of this study provided evidence on that the rate of efficiency is increased.

  2. Poisoning of wild birds from exposure to anticholinesterase compounds and lead: diagnostic methods and selected cases

    Science.gov (United States)

    Franson, J. Christian; Smith, Milton R.

    1999-01-01

    Organophosphorus and carbamate compounds have largely replaced chlorinated hydrocarbons for pesticidal use in the United States, and many cases of poisoning resulting from exposure to these anticholinesterase agents have occurred in free-living birds. Although lead shot has been prohibited for waterfowl hunting throughout the United States since 1991, lead poisoning from the ingestion of spent lead shot is still occasionally seen in wild birds, and lead poisoning from the ingestion of fishing sinkers is an emerging issue of concern. A thorough history, a complete necropsy evaluation, and appropriate laboratory analysis of tissues are required to diagnose toxicoses in wild birds, including those caused by anticholinesterase compounds and lead. The interpretation of brain cholinesterase (ChE) activity results depends on the methods of analysis and comparison with expected normal enzyme activities in brain tissue from the same species. Although lead residues in tissues vary among species, many lead poisoned birds have tissue residues that are much higher than the lower threshold commonly accepted for a diagnosis of lead poisoning. We review histories, necropsy findings, and analytical methodologies and results for selected anticholinesterase and lead poisoning cases diagnosed in wild raptors, waterfowl, and loons.

  3. A case study of multi-seam coal mine entry stability analysis with strength reduction method

    Institute of Scientific and Technical Information of China (English)

    Tulu Ihsan Berk; Esterhuizen Gabriel S.; Klemetti Ted; Murphy Michael M.; Sumner James; Sloan Michael

    2016-01-01

    In this paper, the advantage of using numerical models with the strength reduction method (SRM) to evaluate entry stability in complex multiple-seam conditions is demonstrated. A coal mine under vari-able topography from the Central Appalachian region is used as a case study. At this mine, unexpected roof conditions were encountered during development below previously mined panels. Stress mapping and observation of ground conditions were used to quantify the success of entry support systems in three room-and-pillar panels. Numerical model analyses were initially conducted to estimate the stresses induced by the multiple-seam mining at the locations of the affected entries. The SRM was used to quan-tify the stability factor of the supported roof of the entries at selected locations. The SRM-calculated sta-bility factors were compared with observations made during the site visits, and the results demonstrate that the SRM adequately identifies the unexpected roof conditions in this complex case. It is concluded that the SRM can be used to effectively evaluate the likely success of roof supports and the stability condition of entries in coal mines.

  4. Novel apexification method in a non-vital tooth with an open apex: a case report.

    Directory of Open Access Journals (Sweden)

    Hamid Razavian

    2014-06-01

    Full Text Available Many materials have been introduced for apexification each having their own advantages and disadvantages. This case report aims to present a new method of apexification using a combination of deproteinized bovine bone mineral (DBBM and enamel matrix derivative (EMD. After irrigating the canal of the maxillary right canine with 2.5 % sodium hypochlorite, a mixture of Bio-Oss and EMD was packed into the apical region for formation of an apical barrier and the canal was obturated by thermoplastic gutta percha technique with AH26 sealer; coronal seal was achieved by resin bonded composite. The size of the periapical lesion decreased significantly after 3, 6, 12 and 18-months. The patient had no radiographic signs or clinical symptoms at 24-month follow up and complete maturation of the apex and healing of the periapical bone were achieved.

  5. Viability and resilience of complex systems concepts, methods and case studies from ecology and society

    CERN Document Server

    Deffuant, Guillaume

    2011-01-01

    One common characteristic of a complex system is its ability to withstand major disturbances and the capacity to rebuild itself. Understanding how such systems demonstrate resilience by absorbing or recovering from major external perturbations requires both quantitative foundations and a multidisciplinary view of the topic. This book demonstrates how new methods can be used to identify the actions favouring the recovery from perturbations on a variety of examples including the dynamics of bacterial biofilms, grassland savannahs, language competition and Internet social networking sites. The reader is taken through an introduction to the idea of resilience and viability and shown the mathematical basis of the techniques used to analyse systems. The idea of individual or agent-based modelling of complex systems is introduced and related to analytically tractable approximations of such models. A set of case studies illustrates the use of the techniques in real applications, and the final section describes how on...

  6. Multi-Criteria Sustainability Assessment of Urban Sludge Treatment Technologies: Method and case study

    DEFF Research Database (Denmark)

    An, Da; Xi, Beidou; Ren, Jingzheng;

    2016-01-01

    This study aims at developing a sustainability assessment framework for assessing the technologies for the treatment of urban sewage sludge based on the logarithmic fuzzy preference programming based fuzzy analytic hierarchy process (LFPPFAHP) and extension theory. LFPPFAHP was employed...... to determine the weights of the criteria for sustainability assessment, and extension theory was used to prioritize the alternative technologies for the treatment of urban sewage sludge and grade their sustainability performances. An illustrative case including three technologies (compositing, incineration......, and resource utilization) was studied by the proposed method, and compositing, incineration, and resource utilization are recognized as "Moderately Sustainable", "Not Sustainable", and "Highly Sustainable", respectively. The sustainability sequence in the descending order is resource utilization, compositing...

  7. Fatigue life prediction of casing welded pipes by using the extended finite element method

    Directory of Open Access Journals (Sweden)

    Ljubica Lazić Vulićević

    2016-03-01

    Full Text Available The extended finite element (XFEM method has been used to simulate fatigue crack growth in casing pipe, made of API J55 steel by high-frequency welding, in order estimate its structural integrity and life. Based on the critical value of stress intensity factor KIc, measured in different regions of welded joint, the crack was located in the base metal as the region with the lowest resistance to crack initiation and propagation. The XFEM was first applied to the 3 point bending specimens to verify numerical results with the experimental ones. After successful verification, the XFEM was used to simulate fatigue crack growth, position axially in the pipe, and estimate its remaining life.

  8. Methods of construction and study of Frankl system self-similar solutions in the hyperbolic case

    Science.gov (United States)

    Shemyakina, T.; Alekseenkκo, S.

    2016-11-01

    Self-similar solution of the Frankl system in the hyperbolic case was found. The Frankl system is a system of mixed type equations. Under certain conditions, it describes a model of the membrane theory of shells. The Frankl system describes a stationary irrotational motion of an ideal gas in the transition vicinity from subsonic to supersonic speeds. We find a sufficient condition on the initial data that guarantees existence of a global classical solution continued from a local solution. The proof of the nonlocal solvability of the problem in the original variables is based on the additional argument method. It allowed justify and construct a numerical solution. Numerical experiments were carried out for model examples of the Frankl system.

  9. Case Method Instruction: 25 Minutes of Discussion Can Make a Difference

    Science.gov (United States)

    2007-07-01

    filmed documentary about the case, or (3) an interactive CD that included pieces of the documentary paired with Socratic dialog for guiding case analysis...Second thoughts about “Cases in Auditing.” Accounting Education, 10, 421- 428. McDade, S. A. (1995). Case study pedagogy to advance critical thinking

  10. "Geo-statistics methods and neural networks in geophysical applications: A case study"

    Science.gov (United States)

    Rodriguez Sandoval, R.; Urrutia Fucugauchi, J.; Ramirez Cruz, L. C.

    2008-12-01

    The study is focus in the Ebano-Panuco basin of northeastern Mexico, which is being explored for hydrocarbon reservoirs. These reservoirs are in limestones and there is interest in determining porosity and permeability in the carbonate sequences. The porosity maps presented in this study are estimated from application of multiattribute and neural networks techniques, which combine geophysics logs and 3-D seismic data by means of statistical relationships. The multiattribute analysis is a process to predict a volume of any underground petrophysical measurement from well-log and seismic data. The data consist of a series of target logs from wells which tie a 3-D seismic volume. The target logs are neutron porosity logs. From the 3-D seismic volume a series of sample attributes is calculated. The objective of this study is to derive a set of attributes and the target log values. The selected set is determined by a process of forward stepwise regression. The analysis can be linear or nonlinear. In the linear mode the method consists of a series of weights derived by least-square minimization. In the nonlinear mode, a neural network is trained using the select attributes as inputs. In this case we used a probabilistic neural network PNN. The method is applied to a real data set from PEMEX. For better reservoir characterization the porosity distribution was estimated using both techniques. The case shown a continues improvement in the prediction of the porosity from the multiattribute to the neural network analysis. The improvement is in the training and the validation, which are important indicators of the reliability of the results. The neural network showed an improvement in resolution over the multiattribute analysis. The final maps provide more realistic results of the porosity distribution.

  11. Long-Time Convergence of an Adaptive Biasing Force Method: The Bi-Channel Case

    Science.gov (United States)

    Lelièvre, T.; Minoukadeh, K.

    2011-10-01

    We present convergence results for an adaptive algorithm to compute free energies, namely the adaptive biasing force (ABF) method (D arve and P ohorille in J Chem Phys 115(20):9169-9183, 2001; H énin and C hipot in J Chem Phys 121:2904, 2004). The free energy is the effective potential associated to a so-called reaction coordinate ξ( q), where q = ( q 1, … , q 3 N ) is the position vector of an N-particle system. Computing free energy differences remains an important challenge in molecular dynamics due to the presence of metastable regions in the potential energy surface. The ABF method uses an on-the-fly estimate of the free energy to bias dynamics and overcome metastability. Using entropy arguments and logarithmic Sobolev inequalities, previous results have shown that the rate of convergence of the ABF method is limited by the metastable features of the canonical measures conditioned to being at fixed values of ξ (L elièvre et al. in Nonlinearity 21(6):1155-1181, 2008). In this paper, we present an improvement on the existing results in the presence of such metastabilities, which is a generic case encountered in practice. More precisely, we study the so-called bi-channel case, where two channels along the reaction coordinate direction exist between an initial and final state, the channels being separated from each other by a region of very low probability. With hypotheses made on `channel-dependent' conditional measures, we show on a bi-channel model, which we introduce, that the convergence of the ABF method is, in fact, not limited by metastabilities in directions orthogonal to ξ under two crucial assumptions: (i) exchange between the two channels is possible for some values of ξ and (ii) the free energy is a good bias in each channel. This theoretical result supports recent numerical experiments (M inoukadeh et al. in J Chem Theory Comput 6:1008-1017, 2010), where the efficiency of the ABF approach is demonstrated for such a multiple-channel situation.

  12. Vojta method in the treatment of developmental hip dysplasia – a case report

    Directory of Open Access Journals (Sweden)

    Kiebzak W

    2016-08-01

    Full Text Available Wojciech Kiebzak,1,2 Arkadiusz Żurawski,2 Michał Dwornik3 1Center for Pediatrics, Regional Hospital in Kielce, Kielce, Poland; 2Department of Physiotherapy, Faculty of Medicine and Health Sciences, Jan Kochanowski University, Kielce, Poland; 3Department of Osteopathic Medicine and Physiotherapy, Medical College of Podkowa Lesna, Podkowa Lesna, Poland Background: Developmental dysplasia of the hip joint is one of the most common congenital defects and often results in functional and structural disorders. Such cases particularly demand optimizing therapeutic effects and maximally reducing the duration of therapy. Purpose: The aim of this case report is to present the therapeutic process in a child with developmental hip dysplasia. Case report: This is a case report of a female child with a birth weight of 2,800 g and an Apgar score of 9 points born to a gravida 3 para 3 mother at 37 weeks. The child was delivered by cesarean section, and the pregnancy was complicated by oligohydramnios. Subluxation of the left hip joint was diagnosed by an orthopedist in the third month of life. The treatment followed was the Vojta method (the first phase of reflex turning and reflex crawling. Results: During the 6 weeks of the Vojta treatment, the left half of the femoral head was centralized, and the process of formation of the hip joint acetabulum was influenced effectively enough to change the acetabulum’s Graff type from the baseline D to IIb after 41 days of treatment. Conclusion: The diagnostic work-up of congenital hip joint dysplasia should involve a physiotherapist who will investigate the child’s neuro­muscular coordination, in addition to a neonatologist and a pediatrician. The therapy for a disorder of hip joint development of neuromotor origin should involve the application of global patterns according to Vojta. Children with congenital dysplasia of the hip joint should commence rehabilitation as early as possible. Keywords: global pattern

  13. A science methods course in a professional development school context: A case study of student teachers

    Science.gov (United States)

    Sopko, Linda Diane

    The purpose of this case study was to explore how six student teachers constructed their personal understanding about teaching science to elementary students in the context of a professional development school (PDS). The science methods course was one of five university courses that they attended at the PDS site. The participants spent the remainder of the school day in an assigned classroom where they assisted the classroom teacher in a paraprofessional role. This study was an attempt to determine the knowledge that the participants constructed of science instruction and the school during the preservice semester of their PDS experience and what knowledge was transferred into their student teaching practices. The methodology selected was qualitative. A case study was conducted to determine the constructs of the participants. Data collection included documents concerning the PDS school and personal artifacts of the student teachers. Student teachers, cooperating teachers, and administrators were interviewed. The student teachers were also observed teaching. Triangulation was achieved with the use of multiple data sources, a reflexive journal, and peer debriefers. A cross case comparison was used to identify issues salient to the research questions. The PDS context immediately challenged the participants' prior conceptions about how children learn and should be instructed. Participants believed that the situational knowledge constructed during the PDS semester contributed to their self-confidence during student teaching. The instructional emphasis on standardized tests in the PDS and the limited emphasis on science curriculum and instruction constructed an image of science as a minor component in the elementary curriculum. The student teachers were able to transfer knowledge of inquiry-based instructional strategies, as modeled and practiced in their science methods course, into their science lesson during student teaching. One student teacher used inquiry

  14. IMPACT OF CASE STUDY METHOD OF TEACHING ON THE JOB PERFORMANCE OF BUSINESS GRADUATES, IN THE CASE OF BUSINESS ADMINISTRATION DEPARTMENT IBA-UNIVERSITY OF SINDH-JAMSHORO

    Directory of Open Access Journals (Sweden)

    Anwar Ali Shah G.Syed

    2011-09-01

    Full Text Available The study was conducted on business graduates of IBA-University of Sindh-Jamshoro. A complementary survey was conducted from 50 organizations in Sindh province by using simple random technique, and 200 sample size were selected from student data set. The results showed that case analysis method increasing the vision and understanding the subject as well as practical exposure of the different organizations and it also impact on the personal development of the student when they are solving they different cases in different situations for firm or organization. From last couple of years this method is pretty popular among the students, and they applied all the case studies in local environment and teachers are importing the quality of the education by employing different case studies and their practical touches of different cases. It also helps the graduates when they are going for the jobs, and it has the positive relationship with the job performance. Case studies improving the vision of the business students.

  15. On inverting gravity changes with the harmonic inversion method: Teide (Tenerife) case study

    Science.gov (United States)

    Pohánka, Vladimír; Vajda, Peter; Pánisová, Jaroslava

    2015-06-01

    Here we investigate the applicability of the harmonic inversion method to time-lapse gravity changes observed in volcanic areas. We carry out our study on gravity changes occured over the period of 2004-2005 during the unrest of the Central Volcanic Complex on Tenerife, Canary Islands. The harmonic inversion method is unique in that it calculates the solution of the form of compact homogeneous source bodies via the mediating 3-harmonic function called quasigravitation. The latter is defined in the whole subsurface domain and it is a linear integral transformation of the surface gravity field. At the beginning the seeds of the future source bodies are introduced: these are quasi-spherical bodies located at the extrema of the quasigravitation (calculated from the input gravity data) and their differential densities are free parameters preselected by the interpreter. In the following automatic iterative process the source bodies change their size and shape according to the local values of quasigravitation (calculated in each iterative step from the residual surface gravity field); the process stops when the residual surface gravity field is sufficiently small. In the case of inverting temporal gravity changes, the source bodies represent the volumetric domains of temporal mass-density changes. The focus of the presented work is to investigate the dependence of the size and shape of the found source bodies on their differential densities. We do not aim here (yet) at interpreting the found solutions in terms of volcanic processes associated with intruding or rejuvenating magma and/or migrating volatiles.

  16. [Attention deficit hyperactivity disorder analyzed with array comparative genome hybridization method. Case report].

    Science.gov (United States)

    Duga, Balázs; Czakó, Márta; Komlósi, Katalin; Hadzsiev, Kinga; Sümegi, Katalin; Kisfali, Péter; Melegh, Márton; Melegh, Béla

    2014-10-05

    One of the most common psychiatric disorders during childhood is attention deficit hyperactivity disorder, which affects 5-6% of children worldwide. Symptoms include attention deficit, hyperactivity, forgetfulness and weak impulse control. The exact mechanism behind the development of the disease is unknown. However, current data suggest that a strong genetic background is responsible, which explains the frequent occurrence within a family. Literature data show that copy number variations are very common in patients with attention deficit hyperactivity disorder. The authors present a patient with attention deficit hyperactivity disorder who proved to have two approximately 400 kb heterozygous microduplications at 6p25.2 and 15q13.3 chromosomal regions detected by comparative genomic hybridization methods. Both duplications affect genes (6p25.2: SLC22A23; 15q13.3: CHRNA7) which may play a role in the development of attention deficit hyperactivity disorder. This case serves as an example of the wide spectrum of indication of the array comparative genome hybridization method.

  17. A new method in thoracoscopic inferior mediastinal lymph node biopsy: a case report

    Directory of Open Access Journals (Sweden)

    Sanlı Maruf

    2009-11-01

    Full Text Available Abstract Introduction We performed video-thoracoscopy with a video-mediastinoscope to conduct a mediastinal lymph node biopsy. Here, we discuss the various advantages of the method. Case presentation A 56-year-old Turkish Caucasian man had been complaining of dyspnea on exertion, hacking cough, fever and continuous sweating for one and a half months. Thoracic computed tomography revealed enlarged paratracheal and aorticopulmonary lymph nodes, the largest of which was 1 cm in diameter and reticulo-micronodular interstitial infiltration extending symmetrically to the pleural surfaces in both pulmonary perihilar areas. Computed tomography supported positron emission tomography showed increased fluorodeoxyglucose retention in lymph nodes in both hilar areas (10R and 10L (maximum standardized uptake values 5.6 and 5.7, and in the right lower paratracheal (4R (maximum standardized uptake value 4.1 and right para-esophageal (8 (maximum standardized uptake value 8.9 lymph nodes. Pathological examination of the right lymph node number 8 biopsy using the video-mediastinoscope revealed the presence of granulomatous inflammation. No problems were observed during the postoperative period. Conclusion The use of the video-mediastinoscope for inferior lymph node biopsy in thoracoscopy is an easy, safe and practical method, especially in patients with pleural adhesions.

  18. Single-Case Research Methods: History and Suitability for a Psychological Science in Need of Alternatives.

    Science.gov (United States)

    Hurtado-Parrado, Camilo; López-López, Wilson

    2015-09-01

    This paper presents a historical and conceptual analysis of a group of research strategies known as the Single-Case Methods (SCMs). First, we present an overview of the SCMs, their history, and their major proponents. We will argue that the philosophical roots of SCMs can be found in the ideas of authors who recognized the importance of understanding both the generality and individuality of psychological functioning. Second, we will discuss the influence that the natural sciences' attitude toward measurement and experimentation has had on SCMs. Although this influence can be traced back to the early days of experimental psychology, during which incipient forms of SCMs appeared, SCMs reached full development during the subsequent advent of Behavior Analysis (BA). Third, we will show that despite the success of SCMs in BA and other (mainly applied) disciplines, these designs are currently not prominent in psychology. More importantly, they have been neglected as a possible alternative to one of the mainstream approaches in psychology, the Null Hypothesis Significance Testing (NHST), despite serious controversies about the limitations of this prevailing method. Our thesis throughout this section will be that SCMs should be considered as an alternative to NHST because many of the recommendations for improving the use of significance testing (Wilkinson & the TFSI, 1999) are main characteristics of SCMs. The paper finishes with a discussion of a number of the possible reasons why SCMs have been neglected.

  19. EVALUATION OF WEB SEARCHING METHOD USING A NOVEL WPRR ALGORITHM FOR TWO DIFFERENT CASE STUDIES

    Directory of Open Access Journals (Sweden)

    V. Lakshmi Praba

    2012-04-01

    Full Text Available The World-Wide Web provides every internet citizen with access to an abundance of information, but it becomes increasingly difficult to identify the relevant pieces of information. Research in web mining tries to address this problem by applying techniques from data mining and machine learning to web data and documents. Web content mining and web structure mining have important roles in identifying the relevant web page. Relevancy of web page denotes how well a retrieved web page or set of web pages meets the information need of the user. Page Rank, Weighted Page Rank and Hypertext Induced Topic Selection (HITS are existing algorithms which considers only web structure mining. Vector Space Model (VSM, Cover Density Ranking (CDR, Okapi similarity measurement (Okapi and Three-Level Scoring method (TLS are some of existing relevancy score methods which consider only web content mining. In this paper, we propose a new algorithm, Weighted Page with Relevant Rank (WPRR which is blend of both web content mining and web structure mining that demonstrates the relevancy of the page with respect to given query for two different case scenarios. It is shown that WPRR’s performance is better than the existing algorithms.

  20. Diagnosing developmental dyscalculia on the basis of reliable single case FMRI methods: promises and limitations.

    Directory of Open Access Journals (Sweden)

    Philipp Johannes Dinkel

    Full Text Available FMRI-studies are mostly based on a group study approach, either analyzing one group or comparing multiple groups, or on approaches that correlate brain activation with clinically relevant criteria or behavioral measures. In this study we investigate the potential of fMRI-techniques focusing on individual differences in brain activation within a test-retest reliability context. We employ a single-case analysis approach, which contrasts dyscalculic children with a control group of typically developing children. In a second step, a support-vector machine analysis and cluster analysis techniques served to investigate similarities in multivariate brain activation patterns. Children were confronted with a non-symbolic number comparison and a non-symbolic exact calculation task during fMRI acquisition. Conventional second level group comparison analysis only showed small differences around the angular gyrus bilaterally and the left parieto-occipital sulcus. Analyses based on single-case statistical procedures revealed that developmental dyscalculia is characterized by individual differences predominantly in visual processing areas. Dyscalculic children seemed to compensate for relative under-activation in the primary visual cortex through an upregulation in higher visual areas. However, overlap in deviant activation was low for the dyscalculic children, indicating that developmental dyscalculia is a disorder characterized by heterogeneous brain activation differences. Using support vector machine analysis and cluster analysis, we tried to group dyscalculic and typically developing children according to brain activation. Fronto-parietal systems seem to qualify for a distinction between the two groups. However, this was only effective when reliable brain activations of both tasks were employed simultaneously. Results suggest that deficits in number representation in the visual-parietal cortex get compensated for through finger related aspects of number

  1. Diagnosing developmental dyscalculia on the basis of reliable single case FMRI methods: promises and limitations.

    Science.gov (United States)

    Dinkel, Philipp Johannes; Willmes, Klaus; Krinzinger, Helga; Konrad, Kerstin; Koten, Jan Willem

    2013-01-01

    FMRI-studies are mostly based on a group study approach, either analyzing one group or comparing multiple groups, or on approaches that correlate brain activation with clinically relevant criteria or behavioral measures. In this study we investigate the potential of fMRI-techniques focusing on individual differences in brain activation within a test-retest reliability context. We employ a single-case analysis approach, which contrasts dyscalculic children with a control group of typically developing children. In a second step, a support-vector machine analysis and cluster analysis techniques served to investigate similarities in multivariate brain activation patterns. Children were confronted with a non-symbolic number comparison and a non-symbolic exact calculation task during fMRI acquisition. Conventional second level group comparison analysis only showed small differences around the angular gyrus bilaterally and the left parieto-occipital sulcus. Analyses based on single-case statistical procedures revealed that developmental dyscalculia is characterized by individual differences predominantly in visual processing areas. Dyscalculic children seemed to compensate for relative under-activation in the primary visual cortex through an upregulation in higher visual areas. However, overlap in deviant activation was low for the dyscalculic children, indicating that developmental dyscalculia is a disorder characterized by heterogeneous brain activation differences. Using support vector machine analysis and cluster analysis, we tried to group dyscalculic and typically developing children according to brain activation. Fronto-parietal systems seem to qualify for a distinction between the two groups. However, this was only effective when reliable brain activations of both tasks were employed simultaneously. Results suggest that deficits in number representation in the visual-parietal cortex get compensated for through finger related aspects of number representation in

  2. Incorporating formative assessment and science content into elementary science methods---A case study

    Science.gov (United States)

    Brower, Derek John

    Just as elementary students enter the science classroom with prior knowledge and experiences, so do preservice elementary teachers who enter the science methods classroom. Elementary science methods instructors recognize the challenges associated with preparing teachers for the science classroom. Two of these challenges include overcoming limited science content understanding and a low science teaching efficacy. Based upon research in science misconceptions, conceptual change theory, formative assessment, and science teaching efficacy, this design experiment explored the use of formative assessment in an authentic learning environment to address some of these challenges. As a case study, the goal was to identify two specific topics in science which the preservice teachers did not understand and to model consistent use of formative assessment to guide instruction in those science topics for six weeks. The research questions for this study sought to explore the design of the class while also exploring students' understanding of the science content and their understanding of formative assessment. One specific question was whether the formative data could differentiate between deeply held student misconceptions in science and incomplete science understanding. In addition, data was collected to measure changes in science teaching efficacy as well as preservice teachers' desire to use formative assessment in their own future classrooms. Based upon student interviews and a final content quiz, the participants in this study did show improved science content understanding in the areas of plant food/energy and plate tectonics. The course design implemented a variety of formative assessment tools including formative assessment probes, student science notebooks, student concept maps, a non-graded quiz, and more. The STEBI-B survey identified improved science teaching efficacy among the participants. Student final essays indicated improved understanding of formative assessment

  3. Unpredictable bias when using the missing indicator method or complete case analysis for missing confounder values: an empirical example.

    NARCIS (Netherlands)

    Knol, M.J.; Janssen, K.J.; Donders, A.R.T.; Egberts, A.C.G.; Heerdink, E.R.; Grobbee, D.E.; Moons, K.G.; Geerlings, M.I.

    2010-01-01

    OBJECTIVE: Missing indicator method (MIM) and complete case analysis (CC) are frequently used to handle missing confounder data. Using empirical data, we demonstrated the degree and direction of bias in the effect estimate when using these methods compared with multiple imputation (MI). STUDY DESIGN

  4. Methods for studying medical device technology and practitioner cognition : The case of user-interface issues with infusion pumps

    NARCIS (Netherlands)

    Schraagen, J.M.C.; Verhoeven, F.

    2013-01-01

    Purpose : The aims of this study were to investigate how a variety of research methods is commonly employed to study technology and practitioner cognition. User-interface issues with infusion pumps were selected as a case because of its relevance to patient safety. Methods : Starting from a Cognitiv

  5. Methods for studying medical device technology and practitioner cognition: the case of user-interface issues with infusion pumps

    NARCIS (Netherlands)

    Schraagen, J.M.C.; Verhoeven, F.

    2013-01-01

    Purpose The aims of this study were to investigate how a variety of research methods is commonly employed to study technology and practitioner cognition. User-interface issues with infusion pumps were selected as a case because of its relevance to patient safety. Methods Starting from a Cognitive S

  6. The Proliferation of Case Method Teaching in American Law Schools: Mr. Langdell's Emblematic "Abomination," 1890-1915

    Science.gov (United States)

    Kimball, Bruce A.

    2006-01-01

    Case method teaching was first introduced into American higher education in 1870 by Christopher C. Langdell (1826-1906) of Harvard Law School (HLS), where it became closely associated with a complex of academic meritocratic reforms. "Mr. Langdell's method" became, in fact, emblematic, "creating and embodying cultural values and messages" of the…

  7. Implementation of the Harvard Case Method through a Plan-Do-Check-Act Framework in a University Course

    Science.gov (United States)

    Shieh, Ruey S.; Lyu, Jr Jung; Cheng, Yun-Yao

    2012-01-01

    In 2005, the Harvard Business School began to promote the Harvard case method (HCM) within the Asian region. Because of differences in classroom culture between Asian and Western countries, Asian participants' reaction to the HCM implementation is of interest. This study explores how the western initiated method was implemented in one of the Asian…

  8. The Influence of Alternative Pedagogical Methods in Postsecondary Biology Education: How Do Students Experience a Multimedia Case-Study Environment?

    Science.gov (United States)

    Wolter, Bjorn Hugo Karl

    2010-01-01

    The purpose of this study was to better understand how an online, multimedia case study method influenced students' motivation, performance, and perceptions of science in collegiate level biology classes. It utilized a mix-methods design including data from pre- and post-test, student surveys, and focus group interviews to answer one primary…

  9. A novel method of estimating effective dose from the point dose method: a case study—parathyroid CT scans

    Science.gov (United States)

    Januzis, Natalie; Nguyen, Giao; Hoang, Jenny K.; Lowry, Carolyn; Yoshizumi, Terry T.

    2015-02-01

    The purpose of this study was to validate a novel approach of applying a partial volume correction factor (PVCF) using a limited number of MOSFET detectors in the effective dose (E) calculation. The results of the proposed PVCF method were compared to the results from both the point dose (PD) method and a commercial CT dose estimation software (CT-Expo). To measure organ doses, an adult female anthropomorphic phantom was loaded with 20 MOSFET detectors and was scanned using the non-contrast and 2 phase contrast-enhanced parathyroid imaging protocols on a 64-slice multi-detector computed tomography scanner. E was computed by three methods: the PD method, the PVCF method, and the CT-Expo method. The E (in mSv) for the PD method, the PVCF method, and CT-Expo method was 2.6  ±  0.2, 1.3  ±  0.1, and 1.1 for the non-contrast scan, 21.9  ±  0.4, 13.9  ±  0.2, and 14.6 for the 1st phase of the contrast-enhanced scan, and 15.5  ±  0.3, 9.8  ±  0.1, and 10.4 for the 2nd phase of the contrast-enhanced scan, respectively. The E with the PD method differed from the PVCF method by 66.7% for the non-contrast scan, by 44.9% and by 45.5% respectively for the 1st and 2nd phases of the contrast-enhanced scan. The E with PVCF was comparable to the results from the CT-Expo method with percent differences of 15.8%, 5.0%, and 6.3% for the non-contrast scan and the 1st and 2nd phases of the contrast-enhanced scan, respectively. To conclude, the PVCF method estimated E within 16% difference as compared to 50-70% in the PD method. In addition, the results demonstrate that E can be estimated accurately from a limited number of detectors.

  10. Case-based knowledge formalization and reasoning method for digital terrain analysis - application to extracting drainage networks

    Science.gov (United States)

    Qin, Cheng-Zhi; Wu, Xue-Wei; Jiang, Jing-Chao; Zhu, A.-Xing

    2016-08-01

    Application of digital terrain analysis (DTA), which is typically a modeling process involving workflow building, relies heavily on DTA domain knowledge of the match between the algorithm (and its parameter settings) and the application context (including the target task, the terrain in the study area, the DEM resolution, etc.), which is referred to as application-context knowledge. However, existing DTA-assisted tools often cannot use application-context knowledge because this type of DTA knowledge has not been formalized to be available for inference in these tools. This situation makes the DTA workflow-building process difficult for users, especially non-expert users. This paper proposes a case-based formalization for DTA application-context knowledge and a corresponding case-based reasoning method. A case in this context consists of a series of indices that formalize the DTA application-context knowledge and the corresponding similarity calculation methods for case-based reasoning. A preliminary experiment to determine the catchment area threshold for extracting drainage networks has been conducted to evaluate the performance of the proposed method. In the experiment, 124 cases of drainage network extraction (50 for evaluation and 74 for reasoning) were prepared from peer-reviewed journal articles. Preliminary evaluation shows that the proposed case-based method is a suitable way to use DTA application-context knowledge to achieve a marked reduction in the modeling burden for users.

  11. A gene-based information gain method for detecting gene-gene interactions in case-control studies.

    Science.gov (United States)

    Li, Jin; Huang, Dongli; Guo, Maozu; Liu, Xiaoyan; Wang, Chunyu; Teng, Zhixia; Zhang, Ruijie; Jiang, Yongshuai; Lv, Hongchao; Wang, Limei

    2015-11-01

    Currently, most methods for detecting gene-gene interactions (GGIs) in genome-wide association studies are divided into SNP-based methods and gene-based methods. Generally, the gene-based methods can be more powerful than SNP-based methods. Some gene-based entropy methods can only capture the linear relationship between genes. We therefore proposed a nonparametric gene-based information gain method (GBIGM) that can capture both linear relationship and nonlinear correlation between genes. Through simulation with different odds ratio, sample size and prevalence rate, GBIGM was shown to be valid and more powerful than classic KCCU method and SNP-based entropy method. In the analysis of data from 17 genes on rheumatoid arthritis, GBIGM was more effective than the other two methods as it obtains fewer significant results, which was important for biological verification. Therefore, GBIGM is a suitable and powerful tool for detecting GGIs in case-control studies.

  12. [Classification of Priority Area for Soil Environmental Protection Around Water Sources: Method Proposed and Case Demonstration].

    Science.gov (United States)

    Li, Lei; Wang, Tie-yu; Wang, Xiaojun; Xiao, Rong-bo; Li, Qi-feng; Peng, Chi; Han, Cun-liang

    2016-04-15

    Based on comprehensive consideration of soil environmental quality, pollution status of river, environmental vulnerability and the stress of pollution sources, a technical method was established for classification of priority area of soil environmental protection around the river-style water sources. Shunde channel as an important drinking water sources of Foshan City, Guangdong province, was studied as a case, of which the classification evaluation system was set up. In detail, several evaluation factors were selected according to the local conditions of nature, society and economy, including the pollution degree of heavy metals in soil and sediment, soil characteristics, groundwater sensitivity, vegetation coverage, the type and location of pollution sources. Data information was mainly obtained by means of field survey, sampling analysis, and remote sensing interpretation. Afterwards, Analytical Hierarchy Process (AHP) was adopted to decide the weight of each factor. The basic spatial data layers were set up respectively and overlaid based on the weighted summation assessment model in Geographical Information System (GIS), resulting in a classification map of soil environmental protection level in priority area of Shunde channel. Accordingly, the area was classified to three levels named as polluted zone, risky zone and safe zone, which respectively accounted for 6.37%, 60.90% and 32.73% of the whole study area. Polluted zone and risky zone were mainly distributed in Lecong, Longjiang and Leliu towns, with pollutants mainly resulted from the long-term development of aquaculture and the industries containing furniture, plastic constructional materials and textile and clothing. In accordance with the main pollution sources of soil, targeted and differentiated strategies were put forward. The newly established evaluation method could be referenced for the protection and sustainable utilization of soil environment around the water sources.

  13. The importance of magnetic methods for soil mapping and process modelling. Case study in Ukraine

    Science.gov (United States)

    Menshov, Oleksandr; Pereira, Paulo; Kruglov, Oleksandr; Sukhorada, Anatoliy

    2016-04-01

    The correct planning of agriculture areas is fundamental for a sustainable future in Ukraine. After the recent political problems in Ukraine, new challenges emerged regarding sustainability questions. At the same time the soil mapping and modelling are intensively developing all over the world (Pereira et al., 2015; Brevik et al., in press). Magnetic susceptibility (MS) methods are low cost and accurate for the developing maps of agricultural areas, fundamental for Ukrain's economy.This allow to colleact a great amount of soil data, usefull for a better understading of the spatial distribution of soil properties. Recently, this method have been applied in other works in Ukraine and elsewhere (Jordanova et al., 2011; Menshov et al., 2015). The objective of this work is to study the spatial distribution of MS and humus content on the topsoils (0-5 cm) in two different areas. The first is located in Poltava region and the second in Kharkiv region. The results showed that MS depends of soil type, topography and anthropogenic influence. For the interpretation of MS spatial distribution in top soil we consider the frequency and time after the last tillage, tilth depth, fertilizing, and the puddling regarding the vehicle model. On average the soil MS of the top soil of these two cases is about 30-70×10-8 m3/kg. In Poltava region not disturbed soil has on average MS values of 40-50×10-8 m3/kg, for Kharkiv region 50-60×10-8 m3/kg. The tilled soil of Poltava region has on average an MS of 60×10-8 m3/kg, and 70×10-8 m3/kg in Kharkiv region. MS is higher in non-tilled soils than in the tilled ones. The correlation between MS and soil humus content is very high ( up to 0.90) in both cases. Breivik, E., Baumgarten, A., Calzolari, C., Miller, B., Pereira, P., Kabala, C., Jordán, A. Soil mapping, classification, and modelling: history and future directions. Geoderma (in press), doi:10.1016/j.geoderma.2015.05.017 Jordanova D., Jordanova N., Atanasova A., Tsacheva T., Petrov P

  14. New Methods in Exploring Old Topics: Case Studying Brittle Diabetes in the Family Context

    Science.gov (United States)

    Günther, Moritz Philipp; Winker, Peter; Wudy, Stefan A.; Brosig, Burkhard

    2016-01-01

    Background. In questing for a more refined quantitative research approach, we revisited vector autoregressive (VAR) modeling for the analysis of time series data in the context of the so far poorly explored concept of family dynamics surrounding instable diabetes type 1 (or brittle diabetes). Method. We adopted a new approach to VAR analysis from econometrics referred to as the optimized multivariate lag selection process and applied it to a set of raw data previously analyzed through standard approaches. Results. We illustrated recurring psychosomatic circles of cause and effect relationships between emotional and somatic parameters surrounding glycemic control of the child's diabetes and the affective states of all family members. Conclusion. The optimized multivariate lag selection process allowed for more specific, dynamic, and statistically reliable results (increasing R2 tenfold in explaining glycemic variability), which were derived from a larger window of past explanatory variables (lags). Such highly quantitative versus historic more qualitative approaches to case study analysis of psychosomatics surrounding diabetes in adolescents were reflected critically. PMID:26634215

  15. Case-Based Reasoning Method in Cost Estimation of Drilling Wells

    OpenAIRE

    Hossein Shams Mianaei; Seyed Hossein Iranmanesh

    2013-01-01

    Aim of study is the cost estimation of drilling6T8T 6T8Twells6T8T 6T8Tusing6T Case-Based 6TReasoning6T8T (CBR) method which6T8T is created based6T8T 6T8Ton6T8T 6T8Tthe6T8T 6T8Tviewpoint of using presented6T8T 6T8Tsolutions6T8T 6T8Tfor6T8T 6T8Tprevious6T8T 6T8Tsolved6T8T 6T8Tproblems6T8T in order 6T8Tto solve6T8T new 6T8Tsimilar problems6T8T. 6T8TIn companies6T8T 6T8Tor6T8T 6T8Torganizations6T8T which 6T8Tcost estimation, scheduling,6T8T 6T8Tdesign6T8T, planning 6T8Tand project activities6T8T ...

  16. [Hematoma of the abdominal wall. A case report: pitfall of Seldinger method via femoral artery].

    Science.gov (United States)

    Hiramatsu, Hisaya; Sugiura, Yasushi; Takeda, Ririko; Nanba, Hiroki

    2009-02-01

    We reported a case of an abdominal wall hematoma which caused by Seldinger method via the femoral artery. A 48-year-old female, suffered from direct carotid cavernous fistula, was treated by transfemoral transvenous embolization (TVE). The whole procedure was completed without difficulty except minor resistance of guide wire manipulation during left femoral artery catheterization. Four hours later, the patient became hypotensive and showed the sign of impending shock without definitive causes. Nine hours after the embolization a huge hematoma of the abdominal wall was found. It required the total 1200 m/ of blood transfusion before her blood pressure returned to normal. She recovered fully from this event and discharged uneventfully. There is a speculation that a deep circumflex iliac artery (DCIA) was injured with an angle-shaped guide wire and bled into the abdominal wall. And subsequent systemic heparinization prevented the coagulation process, resulting a large hematoma. Anatomically, an angle-shaped guide wire is easily able to migrate into DCIA. To prevent a vascular injury, it is very important to manipulate a guide wire under fluoroscopic control and to select a J-shaped guide wire instead of an angle-shaped one.

  17. New Methods in Exploring Old Topics: Case Studying Brittle Diabetes in the Family Context

    Directory of Open Access Journals (Sweden)

    Moritz Philipp Günther

    2016-01-01

    Full Text Available Background. In questing for a more refined quantitative research approach, we revisited vector autoregressive (VAR modeling for the analysis of time series data in the context of the so far poorly explored concept of family dynamics surrounding instable diabetes type 1 (or brittle diabetes. Method. We adopted a new approach to VAR analysis from econometrics referred to as the optimized multivariate lag selection process and applied it to a set of raw data previously analyzed through standard approaches. Results. We illustrated recurring psychosomatic circles of cause and effect relationships between emotional and somatic parameters surrounding glycemic control of the child’s diabetes and the affective states of all family members. Conclusion. The optimized multivariate lag selection process allowed for more specific, dynamic, and statistically reliable results (increasing R2 tenfold in explaining glycemic variability, which were derived from a larger window of past explanatory variables (lags. Such highly quantitative versus historic more qualitative approaches to case study analysis of psychosomatics surrounding diabetes in adolescents were reflected critically.

  18. Simulation of Sound Waves Using the Lattice Boltzmann Method for Fluid Flow: Benchmark Cases for Outdoor Sound Propagation

    OpenAIRE

    Erik M. Salomons; Lohman, Walter J. A.; Han Zhou

    2016-01-01

    Propagation of sound waves in air can be considered as a special case of fluid dynamics. Consequently, the lattice Boltzmann method (LBM) for fluid flow can be used for simulating sound propagation. In this article application of the LBM to sound propagation is illustrated for various cases: free-field propagation, propagation over porous and non-porous ground, propagation over a noise barrier, and propagation in an atmosphere with wind. LBM results are compared with solutions of the equation...

  19. The sudden unexpected infant death case registry: a method to improve surveillance.

    Science.gov (United States)

    Shapiro-Mendoza, Carrie K; Camperlengo, Lena T; Kim, Shin Y; Covington, Theresa

    2012-02-01

    This article describes a multistate population-based surveillance system for monitoring sudden unexpected infant deaths (SUIDs) known as the SUID Case Registry pilot program. The pilot program represents collaboration between the Centers for Disease Control and Prevention and the National Center for Child Death Review (NCCDR), which is funded by the Health Resources and Services Administration. The SUID Case Registry builds on existing child death review system activities and protocols. The objectives of the SUID Case Registry are to collect accurate and consistent population-based data about the circumstances and events associated with SUID cases, to improve the completeness and quality of SUID case investigations, and to use a decision-making algorithm with standardized definitions to categorize SUID cases. States who participate in the pilot program commit to review all SUID cases in their state by using their multidisciplinary state and local child death review teams. These teams request and review data from death scene investigators, medical examiners and coroners, law enforcement, social services, pediatric and obstetric providers, and public health per usual, but as part of the pilot program, supplement their SUID case reviews by discussing additional medical, environmental, and behavioral factors, and entering this data using the NCCDR Web-based Case Reporting System. This new surveillance system aims to improve knowledge of factors surrounding SUID events and improve investigation practices. The surveillance system will allow researchers and program planners to create prevention strategies and interventions, ultimately reducing SUIDs and injury-related infant deaths.

  20. The Ranking of Financing Methods in Urban Old Texture (Case Study of Isfahan City

    Directory of Open Access Journals (Sweden)

    R. Moayedfar

    2013-01-01

    final weight of 0.235 is in the second place in financing methods priority. On the other hand, considering the advantages of this method and also its high place in ranking due to criteria, more attention should be given to it.-As the results showed, the method of private sector participation is the best method for reconstructing and rehabilitating old urban texture. Thus, government officials need to consider this and provide required facilities to supply bonds.-To use private sector resources, whether in the form of investing in a project or the owner's participation, well and on time announcement of project's conditions is one of the main preconditions and advertisement and announcement are among the items which yet no investment is done for them and we can say that this is one of the problems in the reconstruction and rehabilitation of projects and solving it can be very useful for financing resources. -The rate of return was one important criterion in current research to attract private sector's partnership. So, it is necessary to consider profit rate in financing methods in a way that private sector's capitals instead of being invested in banks, be used in profitable urban projects which will either bring more economic profit or make the city more beautiful, healthier and with more and better services. -Designing new financing methods for reconstructing and rehabilitating old urban texture considering the criteria ranking of this research.Also, it is suggested that in the case of using AHP method, try to have more variation in financing methods.Key words: Financing, Partnership, Rehabilitation and Reconstruction, Old texture, Analytic Hierarchy Process AHPReferencesAkbari, N and Zahedi Keyvan, M. (2008. Application of ranking approaches and MADAM decision making. Tehran: Country Municipalities Organization.Akbari, N. and Tavasoli, N. (2009. Pathological and analyzing of municipal revenue sources (Isfahan city case study. Daricheh Quarterly, 20, 21-32.Alizadeh, A

  1. A Case Study of Teaching Marketing Research Using Client-Sponsored Projects: Method, Challenges, and Benefits

    Science.gov (United States)

    Bove, Liliana L.; Davies, W. Martin

    2009-01-01

    This case study outlines the use of client-sponsored research projects in a quantitative postgraduate marketing research subject conducted in a 12-week semester in a research-intensive Australian university. The case study attempts to address the dearth of recent literature on client-sponsored research projects in the discipline of marketing.…

  2. Treatment of 30 Cases of Hiccup due to Cerebral Disorders by Acupoint-injecting Method

    Institute of Scientific and Technical Information of China (English)

    WU Zu-qiang; SU Xuan; HUANG Guo-qi

    2003-01-01

    Thirty cases of hiccup due to cerebral disorders were treated by injecting 2 ml of Angelica(another 30 cases were treated by muscular injection of 30 mg of metoclopramide as the control group.After the treatments for three days, the total effective rate was 100% in the former and 83.3% in the latter.

  3. Modeling Virtual Healthcare Systems: Methods for Qualitative Case Analysis and Sociometry of Institutional Infrastructures

    OpenAIRE

    Séror, Ann

    2003-01-01

    The objective of this paper is to present a strategy for the qualitative analysis of virtual institutional infrastructures serving complex healthcare systems. Methodologies considered include case analysis, grounded theory, and sociometry. The discussion is illustrated with references to case analyses of diverse healthcare systems. Particular attention is focused on ideological values expressed in market dynamics and system control structures.

  4. Modeling virtual healthcare systems: methods for qualitative case analysis and sociometry of institutional infrastructures.

    Science.gov (United States)

    Séror, Ann

    2003-01-01

    The objective of this paper is to present a strategy for the qualitative analysis of virtual institutional infrastructures serving complex healthcare systems. Methodologies considered include case analysis, grounded theory, and sociometry. The discussion is illustrated with references to case analyses of diverse healthcare systems. Particular attention is focused on ideological values expressed in market dynamics and system control structures.

  5. Use of Case Study Methods in Human Resource Management, Development, and Training Courses: Strategies and Techniques

    Science.gov (United States)

    Maxwell, James R.; Gilberti, Anthony F.; Mupinga, Davison M.

    2006-01-01

    This paper will study some of the problems associated with case studies and make recommendations using standard and innovative methodologies effectively. Human resource management (HRM) and resource development cases provide context for analysis and decision-making designs in different industries. In most HRM development and training courses…

  6. Single Case Method in Psychology: How to Improve as a Possible Methodology in Quantitative Research.

    Science.gov (United States)

    Krause-Kjær, Elisa; Nedergaard, Jensine I

    2015-09-01

    Awareness of including Single-Case Method (SCM), as a possible methodology in quantitative research in the field of psychology, has been argued as useful, e.g., by Hurtado-Parrado and López-López (IPBS: Integrative Psychological & Behavioral Science, 49:2, 2015). Their article introduces a historical and conceptual analysis of SCMs and proposes changing the, often prevailing, tendency of neglecting SCM as an alternative to Null Hypothesis Significance Testing (NHST). This article contributes by putting a new light on SCM as an equally important methodology in psychology. The intention of the present article is to elaborate this point of view further by discussing one of the most fundamental requirements as well as main characteristics of SCM regarding temporality. In this respect that; "…performance is assessed continuously over time and under different conditions…" Hurtado-Parrado and López-López (IPBS: Integrative Psychological & Behavioral Science, 49:2, 2015). Defining principles when it comes to particular units of analysis, both synchronic (spatial) and diachronic (temporal) elements should be incorporated. In this article misunderstandings of the SCM will be adduced, and further the temporality will be described in order to propose how the SCM could have a more severe usability in psychological research. It is further discussed how to implement SCM in psychological methodology. It is suggested that one solution might be to reconsider the notion of time in psychological research to cover more than a variable of control and in this respect also include the notion of time as an irreversible unity within life.

  7. MAP as a conservation method for contemporary art with foodstuffs : three case studies.

    Directory of Open Access Journals (Sweden)

    Julie Gilman

    2011-11-01

    Full Text Available This article examines the use of Modified Atmosphere Packaging (MAP, a widely applied preservation method in the food packing industry, for preserving contemporary artworks with foodstuffs. Three case studies are presented for which guidelines to preserve those works are proposed, taking into account the temporal, ephemeral character of these artworks on the one hand and their material preservation on the other hand and to explore whether and how they can be presented and preserved for future generations.Cet article s’intéresse à l’utilisation de l’emballage sous atmosphère modifiée (MAP, une méthode de conservation largement appliquée dans l’industrie alimentaire, à des fins de préservation d’œuvres d’art contemporain comportant des denrées de ce type. Un grand nombre d’œuvres d’art qui utilisent la nourriture incluent des paramètres immatériels pour laquelle le restaurateur doit s’adapter et développer de nouvelles stratégies de conservation. Le choix des matériaux et la manière dont ils sont utilisés ont des implications importantes pour l’interprétation, l’exposition et l’évolution de ces pièces. L’objectif principal est d’analyser ces questions de façon systématique, sur une base scientifique et multidisciplinaire. Trois études de cas sont présentées : des orientations sont proposées pour le stockage et l’emballage des œuvres dans un environnement sous atmosphère modifiée, ce qui peut prolonger la durée de vie des oeuvres d’art comportant des denrées alimentaires.

  8. Exploring the use of storytelling in quantitative research fields using a multiple case study method

    Science.gov (United States)

    Matthews, Lori N. Hamlet

    The purpose of this study was to explore the emerging use of storytelling in quantitative research fields. The focus was not on examining storytelling in research, but rather how stories are used in various ways within the social context of quantitative research environments. In-depth interviews were conducted with seven professionals who had experience using storytelling in their work and my personal experience with the subject matter was also used as a source of data according to the notion of researcher-as-instrument. This study is qualitative in nature and is guided by two supporting theoretical frameworks, the sociological perspective and narrative inquiry. A multiple case study methodology was used to gain insight about why participants decided to use stories or storytelling in a quantitative research environment that may not be traditionally open to such methods. This study also attempted to identify how storytelling can strengthen or supplement existing research, as well as what value stories can provide to the practice of research in general. Five thematic findings emerged from the data and were grouped under two headings, "Experiencing Research" and "Story Work." The themes were found to be consistent with four main theoretical functions of storytelling identified in existing scholarly literature: (a) sense-making; (b) meaning-making; (c) culture; and (d) communal function. The five thematic themes that emerged from this study and were consistent with the existing literature include: (a) social context; (b) quantitative versus qualitative; (c) we think and learn in terms of stories; (d) stories tie experiences together; and (e) making sense and meaning. Recommendations are offered in the form of implications for various social contexts and topics for further research are presented as well.

  9. Inversion Method for Early Detection of ARES-1 Case Breach Failure

    Science.gov (United States)

    Mackey, Ryan M.; Kulikov, Igor K.; Bajwa, Anupa; Berg, Peter; Smelyanskiy, Vadim

    2010-01-01

    A document describes research into the problem of detecting a case breach formation at an early stage of a rocket flight. An inversion algorithm for case breach allocation is proposed and analyzed. It is shown how the case breach can be allocated at an early stage of its development by using the rocket sensor data and the output data from the control block of the rocket navigation system. The results are simulated with MATLAB/Simulink software. The efficiency of an inversion algorithm for a case breach location is discussed. The research was devoted to the analysis of the ARES-l flight during the first 120 seconds after the launch and early prediction of case breach failure. During this time, the rocket is propelled by its first-stage Solid Rocket Booster (SRB). If a breach appears in SRB case, the gases escaping through it will produce the (side) thrust directed perpendicular to the rocket axis. The side thrust creates torque influencing the rocket attitude. The ARES-l control system will compensate for the side thrust until it reaches some critical value, after which the flight will be uncontrollable. The objective of this work was to obtain the start time of case breach development and its location using the rocket inertial navigation sensors and GNC data. The algorithm was effective for the detection and location of a breach in an SRB field joint at an early stage of its development.

  10. Determination of the manufacturing cost by UEP method: a case study in the cold storage sausage making industry

    Directory of Open Access Journals (Sweden)

    Rodney Wernke

    2015-03-01

    Full Text Available This article aimed to answer the following research question: how to show the manager of a company that produces sausages’ the positive impacts of knowing the unit cost of processing? The objective was to verify the possibility of applying the UEP method to determine the cost of processing the products manufactured by a company of this type. A descriptive methodology was used in a case study format, with a qualitative approach. A literature review was initially conducted regarding the UEP method, approaching aspects such as history, concepts, guiding principles, steps to be taken for implementation, benefits and associated limitations. Then the main characteristics of the case study conducted through a brief description of the focused company and the steps followed to implement such a method of costing were presented. Subsequently, the informational benefits highlighted by the study and the limitations of methodology were listed . It was concluded that the method is applicable in the context of this company.

  11. Self-rostering applied to case studies - An ILP method to construct a feasible schedule

    NARCIS (Netherlands)

    Uijland, Suzanne; Veen, van der Egbert; Hurink, Johann; Schutten, Marco; Kjenstad, D.; Riise, A.; Nordlander, T.E.; McCollum, B.; Burke, E.

    2012-01-01

    We discuss the self-rostering problem, a concept receiving more and more attention from both theory and practice. We outline our methodology and discuss its application to a number of practical case studies.

  12. Evaluation of the effects of rehabilitation after surgery using the Ravitch and Nuss methods: a case study

    OpenAIRE

    Bal-Bocheńska, Monika Anna

    2016-01-01

    Rehabilitation may be helpful in the prevention of complications associated with the treatment of patients with pectus excavatum who are subjected to surgery using the Ravitch and Nuss methods. This paper presents the case of a patient who underwent successful physical rehabilitation after 8 weeks from the surgery using the combined method. As part of the Nuss procedure, two plates were implanted to form a scaffolding for the patient's chest, which had previously been corrected with the Ravit...

  13. Incidence of AIDS cases in Spanish penal facilities through the capture-recapture method, 2000.

    Science.gov (United States)

    Acin, E; Gómez, P; Hernando, P; Corella, I

    2003-09-01

    Three available sources of information used in the surveillance of AIDS in Spanish prisons were used to carry out a capture-recapture study. Results showed the register of AIDS cases (RCS) considerably underestimates the incidence of this disease in prisons as it covers only 50% of cases. This study highlights the need to use additional sources to the RCS to evaluate the real incidence of AIDS in prisons in Spain.

  14. Case-based reactive navigation: a method for on-line selection and adaptation of reactive robotic control parameters.

    Science.gov (United States)

    Ram, A; Arkin, R C; Moorman, K; Clark, R J

    1997-01-01

    We present a new line of research investigating on-line adaptive reactive control mechanisms for autonomous intelligent agents. We discuss a case-based method for dynamic selection and modification of behavior assemblages for a navigational system. The case-based reasoning module is designed as an addition to a traditional reactive control system, and provides more flexible performance in novel environments without extensive high level reasoning that would otherwise slow the system down. The method is implemented in the ACBARR (case-based reactive robotic) system and evaluated through empirical simulation of the system on several different environments, including "box canyon" environments known to be problematic for reactive control systems in general.

  15. Case Studies in Low-Energy District Heating Systems: Determination of Dimensioning Methods for Planning the Future Heating Infrastructure

    DEFF Research Database (Denmark)

    Tol, Hakan; Nielsen, Susanne Balslev; Svendsen, Svend

    of the future’s sustainable and energy efficient heating infrastructure. In this paper, a case study which focuses on dimensioning method of piping network of low-energy DH system in a new settlement, located in Roskilde Municipality, Denmark, is presented. In addition to the developed dimensioning method...... settlement, located in Gladsaxe Municipality, Denmark. The technical results of the case studies also conclude with an outline of possible municipal planning of DH system with regard to climate and energy....... suggests a plan for an energy efficient District Heating (DH) system with low operating temperatures, such as 55°C supply and 25°C return; connected to low-energy buildings. Different case studies referring to typical DH planning situations could show the rational basis for the integrated planning...

  16. Closing the "know-do" gap: training public health professionals in eating disorders prevention via case-method teaching.

    Science.gov (United States)

    Austin, S Bryn; Sonneville, Kendrin R

    2013-07-01

    Expansion of our societies' capacity to prevent eating disorders will require strategic integration of the topic into the curricula of professional training programs. An ideal way to integrate new content into educational programs is through the case-method approach, a teaching method that is more effective than traditional teaching techniques. The Strategic Training Initiative for the Prevention of Eating Disorders has begun developing cases designed to be used in classroom settings to engage students in topical, high-impact issues in public health approaches to eating disorders prevention and screening. Dissemination of these cases will provide an opportunity for students in public health training programs to learn material in a meaningful context by actively applying skills as they are learning them, helping to bridge the "know-do" gap. The new curriculum is an important step toward realizing the goal that public health practitioners be fully equipped to address the challenge of eating disorders prevention.

  17. On the impedance of galvanic cells XXVI. Application of the complex plane method in the case of mixed currents

    NARCIS (Netherlands)

    Dekker, B.G.; Sluyters-Rehbach, M.; Sluyters, J.H.

    1969-01-01

    The applicability of the complex plane method for the evaluation of the impedance parameters in the case of two simultaneously proceeding electrode reactions is discussed. It is shown that the possibility of the evaluation depends strongly on the values of the irreversibility quotients of both react

  18. The Use of Narrative Analysis as a Research and Evaluation Method of Atypical Language: The Case of Deaf Writing

    Science.gov (United States)

    Koutsoubou, M.

    2010-01-01

    The present paper argues the use of "narratives" as the most appropriate evaluation method in cases of atypical language production. Narrative as a genre has an ecological validity that other genres used in language research and evaluation do not have. Narratives develop naturally from very early, they are independent of education and academic…

  19. The Art of Empathy: A Mixed Methods Case Study of a Critical Place-Based Art Education Program

    Science.gov (United States)

    Bertling, Joy Gaulden

    2012-01-01

    This mixed methods case study examined middle school students' empathy with the environment within a critical place-based art classroom. The curriculum was informed by the ecological imagination, which calls for a new mode of education: education that embraces the arts as a way to conceive of pro-ecological perspectives, other ways of being…

  20. A Comparison of Case Study and Traditional Teaching Methods for Improvement of Oral Communication and Critical-Thinking Skills

    Science.gov (United States)

    Noblitt, Lynnette; Vance, Diane E.; Smith, Michelle L. DePoy

    2010-01-01

    This study compares a traditional paper presentation approach and a case study method for the development and improvement of oral communication skills and critical-thinking skills in a class of junior forensic science majors. A rubric for rating performance in these skills was designed on the basis of the oral communication competencies developed…

  1. Thai Perspectives on the Internationalization of Higher Education in Thailand: A Mixed Methods Analysis and Three Mini-Case Studies

    Science.gov (United States)

    McBride, Karen Anne

    2012-01-01

    This study is a sequential mixed methods study that also includes three mini-case studies for the purpose of portraying contemporary Thai views on the internationalization of higher education in Thailand and reflections on its status as an international education hub in the Southeast Asian region. An inductive analysis technique is used whereby…

  2. Development of a Reality-Based Multimedia Case Study Teaching Method and Its Effect on Students' Planned Food Safety Behaviors

    Science.gov (United States)

    Alberts, Caitlin M.; Stevenson, Clinton D.

    2017-01-01

    There is opportunity to decrease the frequency of foodborne illnesses by improving food safety competencies and planned behaviors of college students before they begin careers in the food industry. The objectives of this study were to (1) develop a multimedia case study teaching method that provides real world context for food science education;…

  3. An Unmatched Case-Control Study of Nearly Lethal Suicide Attempts in Houston, Texas: Research Methods and Measurements.

    Science.gov (United States)

    Kresnow, Marcie-jo; Ikeda, Robin M.; Mercy, James A.; Powell, Kenneth E.; Potter, Lloyd B.; Simon, Thomas R.; Lee, Roberta K.; Frankowski, Ralph F.

    2002-01-01

    This article details the research methods and measurements used in conducting a population-based, case-control study of nearly lethal suicide attempts among persons aged 13-34 years. This study was designed to extend understanding of suicidal behavior and prevention activities beyond identification of mental illnesses. Overall strengths and…

  4. Ascertaining year of birth/age at death in forensic cases: A review of conventional methods and methods allowing for absolute chronology

    DEFF Research Database (Denmark)

    Lynnerup, Niels; Kjeldsen, H; Zweihoff, R;

    2010-01-01

    of birth) is often a fundamental piece of data in connection with forensic identification of unidentified bodies. The methods most often used are based on determining various morphological, age-related, changes on the skeleton (or teeth, although odontological methods are not reviewed in this paper......Based on an actual case, where we were able to ascertain the year of birth of three dead babies found in a deep-freezer to within 1–2 years (1986, 1988 and 2004, respectively), we review the current state of forensic age determination/year of birth determination. The age of an individual (year...

  5. A Case Study Concerning Sales Prediction Using Sales Quantitative Prediction Methods

    Directory of Open Access Journals (Sweden)

    Simona Elena Dragomirescu

    2010-08-01

    Full Text Available The sales condition the entire activity of a enterprise, its variation being considered the main risk factor on the performances and financial position of the enterprise. The importance of elaboration of such budget is given by: (a on long term: the establishing of the investments and financing plans; (b on medium term: the establishing of publicity and promotion expenses budget; and (c on short term: the determination of the production level, of supply program, the optimization of labor force. In planning the sales volume, there exist several methods, from which we remind: causal method, non-causal method, direct method, indirect method, judgment and statistic methods. All these methods have advantages and disadvantages. Quantitative methods are the methods that in predictions’ realization start from numbered statistic data. The linear adjustment, correlation may be applied for the general tendencies of sales evolution research, when the tendency is linear.

  6. Use of the self-controlled case-series method in vaccine safety studies: review and recommendations for best practice.

    Science.gov (United States)

    Weldeselassie, Y G; Whitaker, H J; Farrington, C P

    2011-12-01

    The self-controlled case-series method was originally developed to investigate potential associations between vaccines and adverse events, and is now commonly used for this purpose. This study reviews applications of the method to vaccine safety investigations in the period 1995-2010. In total, 40 studies were reviewed. The application of the self-controlled case-series method in these studies is critically examined, with particular reference to the definition of observation and risk periods, control of confounders, assumptions and potential biases, methodological and presentation issues, power and sample size, and software. Comparisons with other study designs undertaken in the papers reviewed are also highlighted. Some recommendations are presented, with the emphasis on promoting good practice.

  7. Improvements in methods for monitoring anchor casings in mining excavations of KGHM Polska Miedź S.A. mines

    Directory of Open Access Journals (Sweden)

    Maciej Madziarz

    2016-01-01

    Full Text Available This article presents the results of works carried out by KGHM CUPRUM Sp z o.o. CBR (Research and Development Centre, on behalf of KGHM Polska Miedź SA. It is aimed at improving previously used monitoring methods of mine excavation anchor casings used in underground copper ore mines of KGHM Polska Miedź S.A. It presents a method allowing for continuous measurement and recording of load changes in instrumented anchors. This method was developed by request of KGHM Polska Miedź S.A. Particular attention was paid to issues related to the impact of dynamic changes of rock formation pressure on the excavation in anchor casing.

  8. Method of evaluating the impact of ERP implementation critical success factors - a case study in oil and gas industries

    Science.gov (United States)

    Gajic, Gordana; Stankovski, Stevan; Ostojic, Gordana; Tesic, Zdravko; Miladinovic, Ljubomir

    2014-01-01

    The so far implemented enterprise resource planning (ERP) systems have in many cases failed to meet the requirements regarding the business process control, decrease of business costs and increase of company profit margin. Therefore, there is a real need for an evaluation of the influence of ERP on the company's performance indicators. Proposed in this article is an advanced model for the evaluation of the success of ERP implementation on organisational and operational performance indicators in oil-gas companies. The recommended method establishes a correlation between a process-based method, a scorecard model and ERP critical success factors. The method was verified and tested on two case studies in oil-gas companies using the following procedure: the model was developed, tested and implemented in a pilot gas-oil company, while the results were implemented and verified in another gas-oil company.

  9. A performance analysis method for distributed real-time robotic systems: A case study of remote teleoperation

    Science.gov (United States)

    Lefebvre, D. R.; Sanderson, A. C.

    1994-01-01

    Robot coordination and control systems for remote teleoperation applications are by necessity implemented on distributed computers. Modeling and performance analysis of these distributed robotic systems is difficult, but important for economic system design. Performance analysis methods originally developed for conventional distributed computer systems are often unsatisfactory for evaluating real-time systems. The paper introduces a formal model of distributed robotic control systems; and a performance analysis method, based on scheduling theory, which can handle concurrent hard-real-time response specifications. Use of the method is illustrated by a case of remote teleoperation which assesses the effect of communication delays and the allocation of robot control functions on control system hardware requirements.

  10. [The Moral Deliberation: The Clinical Ethics Method. Presentation of a Paediatric Case].

    Science.gov (United States)

    Atuesta, Juana; Vásquez, Pablo; Roa, Juan David; Acuña, Hilda

    2016-01-01

    Decision-making is one of the most difficult tasks of medical judgment, especially when cases involve paediatric patients with different cultural characteristics. It is the obligation of clinical ethics, taking the interdisciplinary approach as a tool to comprehensively analyse the clinical, social, cultural and legal aspects, among other topics, when choosing the treatment options that will be more beneficial for the patient. A clinical case, should enable this process of analysis and teamwork to be understood in practical way in order to address difficult medical problems.

  11. Mixed Methods in Emerging Academic Subdisciplines: The Case of Sport Management

    Science.gov (United States)

    van der Roest, Jan-Willem; Spaaij, Ramón; van Bottenburg, Maarten

    2015-01-01

    This article examines the prevalence and characteristics of mixed methods research in the relatively new subdiscipline of sport management. A mixed methods study is undertaken to evaluate the epistemological/philosophical, methodological, and technical levels of mixed methods design in sport management research. The results indicate that mixed…

  12. Mixed Methods in Emerging Academic Subdisciplines : The Case of Sport Management

    NARCIS (Netherlands)

    van der Roest, Jan Willem; Spaaij, Ramón; van Bottenburg, Maarten

    2015-01-01

    This article examines the prevalence and characteristics of mixed methods research in the relatively new subdiscipline of sport management. A mixed methods study is undertaken to evaluate the epistemological/philosophical, methodological, and technical levels of mixed methods design in sport managem

  13. Mixed methods in emerging academic subdisciplines: the case of sport management

    NARCIS (Netherlands)

    van der Roest, J.-W.; Spaaij, R.; van Bottenburg, M.

    2015-01-01

    This article examines the prevalence and characteristics of mixed methods research in the relatively new subdiscipline of sport management. A mixed methods study is undertaken to evaluate the epistemological/philosophical, methodological, and technical levels of mixed methods design in sport managem

  14. The Comparative Method of Language Acquisition Research: A Mayan Case Study

    Science.gov (United States)

    Pye, Clifton; Pfeiler, Barbara

    2014-01-01

    This article demonstrates how the Comparative Method can be applied to cross-linguistic research on language acquisition. The Comparative Method provides a systematic procedure for organizing and interpreting acquisition data from different languages. The Comparative Method controls for cross-linguistic differences at all levels of the grammar and…

  15. Response prediction techniques and case studies of a path blocking system based on Global Transmissibility Direct Transmissibility method

    Science.gov (United States)

    Wang, Zengwei; Zhu, Ping; Zhao, Jianxuan

    2017-02-01

    In this paper, the prediction capabilities of the Global Transmissibility Direct Transmissibility (GTDT) method are further developed. Two path blocking techniques solely using the easily measured variables of the original system to predict the response of a path blocking system are generalized to finite element models of continuous systems. The proposed techniques are derived theoretically in a general form for the scenarios of setting the response of a subsystem to zero and of removing the link between two directly connected subsystems. The objective of this paper is to verify the reliability of the proposed techniques by finite element simulations. Two typical cases, the structural vibration transmission case and the structure-borne sound case, in two different configurations are employed to illustrate the validity of proposed techniques. The points of attention for each case have been discussed, and conclusions are given. It is shown that for the two cases of blocking a subsystem the proposed techniques are able to predict the new response using measured variables of the original system, even though operational forces are unknown. For the structural vibration transmission case of removing a connector between two components, the proposed techniques are available only when the rotational component responses of the connector are very small. The proposed techniques offer relative path measures and provide an alternative way to deal with NVH problems. The work in this paper provides guidance and reference for the engineering application of the GTDT prediction techniques.

  16. Radiofrequency kyphoplasty: a new method for the treatment of osteoporotic vertebral body compression fractures - a case report

    Directory of Open Access Journals (Sweden)

    Licht AW

    2011-01-01

    Full Text Available From January 2005 to December 2008, a total of 148 patients with 205 vertebral fractures were treated with the balloon kyphoplasty system of Medtronic Company at the Asklepios Südpfalzkliniken in Kandel. The outcome of the procedure was favourable. During this period, cement leakages were observed in 27 % of cases, and a pulmonary embolism requiring intervention occurred in one case. Since February 2009, 21 patients with 26 vertebral fractures have been manutreated by the new radiofrequency kyphoplasty procedure of DFine Company. Very good clinical results have been obtained with this method.

  17. Indication, methods and results of selective arteriography of the A. iliaca interna in case of erectile dysfunction

    Energy Technology Data Exchange (ETDEWEB)

    Baehren, W.; Gall, H.; Scherb, W.; Thon, W.

    1988-01-01

    Erectile dysfunction very frequently can be traced back to the real cause by means of angiography. Selective angiography is the method of choice in cases where other causes of circulatory disturbance have already been excluded, and non-invasive tests are expected to yield information of relevance to therapy. The qualitatively best angiographic results are obtained by examination under peridural anesthesia and by intracavitary injection of vaso-active substances. Selective arteriography is indicated in cases of primary or post-traumatic erectile dysfunction. It is a prerequisite of surgery for revascularisation of the pudendal-penile vascular bed.

  18. A new method for evaluating worst- and best-case (WBC) economic consequences of technological development

    DEFF Research Database (Denmark)

    Schjær-Jacobsen, Hans

    1996-01-01

    of interval analysis are introduced in order to establish a basis for adequately handling the complexity involved in true WBC analysis. The practical part of the paper demonstrates the applicability of WBC budgeting in a cash-flow case related to a real-life decision situation at the project level...

  19. Implications of Using Case Study Instruction in a Foreign/Second Language Methods Course

    Science.gov (United States)

    Haley, Marjorie Hall

    2004-01-01

    To date, very little has been written about what kind of experiences foreign and second language teachers had during their preservice teaching internships and the implications of these experiences on the quality of foreign and second language instruction in the United States in K-12 settings. This article presents the case study of one student…

  20. COMPARISON OF GEOCODING METHODS USED IN CASE-CONTROL STUDY OF AIR QUALITY AND BIRTH DEFECTS

    Science.gov (United States)

    Introduction: Accurate geocoding of maternal residence is critical to the success of an ongoing case-control study of exposure to five criteria air pollutants and the risk of selected birth defects in seven Texas counties between 1997 and 2000. The geocoded maternal residence a...

  1. The "Inseparable Bond between Cure and Research": Clinical Case Study as a Method of Psychoanalytic Inquiry

    Science.gov (United States)

    Midgley, Nick

    2006-01-01

    Since Freud's own time, there has been great deal of debate about the most appropriate research methodology for investigating psychoanalytic psychotherapy [Fonagy, "Journal of Child Psychotherapy", 29 (2): 129-136, 2003; Rustin, "Journal of Child Psychotherapy", 29 (2): 137-145, 2003]. The single case study, which has a long tradition both within…

  2. The Research of Through-casing Resistivity Logging Logging Calibration System Leakage Current Measurement Method

    Directory of Open Access Journals (Sweden)

    ZHANG Jiatian

    2013-07-01

    Full Text Available This paper introduces the logging principle of through-casing resistivity logging technology, finds a phenomenon that the leakage current measurements are susceptible to sufferring interferences. The through-casing resistivity logging technology in Russia and that of Schlumberger are studied, and the system of through-casing resistivity logging is established to improve the accuracy of calibrating, testing and measuring of the instrument. In this paper, distribution parameters of the form is replaced by the lumped parameter, and precision resistor array simulation in formation leakage current and scale pool simulation in different resistivity of formation are conducted, which make the dynamic range of the simulation in formation resistivity of the medium increase to 1- 300 Ω·m and meet the requirement of through-casing resistivity logging technology measurement range, 1 Ω·m ~ 100 Ω·m. Since the measuring signals of calibration acquisition and processing systems are extremely weak and calculation signals need to tell the nV (nanovolts level, the high accurate data acquisition system of 24 digits is applied.

  3. Effects of Using Case-Study Method in Social Studies on Students' Attitudes towards Environment

    Science.gov (United States)

    Akengin, Hamza; Aydemir, Gökhan

    2012-01-01

    This study has aimed to inquired whether there was a significant difference between academic achievement and attitudes of 6th grade students who learned "The Resources of Our Country" unit of social studies through case studies and students who learned this unit with teaching based on existing unit. Besides it was aimed to present…

  4. Advancing Higher Education with Mobile Learning Technologies: Cases, Trends, and Inquiry-Based Methods

    Science.gov (United States)

    Keengwe, Jared, Ed.; Maxfield, Marian B., Ed.

    2015-01-01

    Rapid advancements in technology are creating new opportunities for educators to enhance their classroom techniques with digital learning resources. Once used solely outside of the classroom, smartphones, tablets, and e-readers are becoming common in many school settings. "Advancing Higher Education with Mobile Learning Technologies: Cases,…

  5. Cases on Digital Game-Based Learning: Methods, Models, and Strategies

    Science.gov (United States)

    Baek, Youngkyun; Whitton, Nicola

    2013-01-01

    In K-12 classrooms, as well as on the college and university level, the incorporation of digital games has played a vital role in the educational system. While introducing teachers to new fields, these digital games have been designed and implemented for the classroom and have shown positive results at a variety of educational levels. Cases on…

  6. A Method of Developing and Introducing Case-Based Learning to a Preclinical Veterinary Curriculum

    Science.gov (United States)

    Crowther, Emma; Baillie, Sarah

    2016-01-01

    Case-based learning (CBL) has been introduced as part of a major review of the veterinary curriculum at the University of Bristol. The initial aim was to improve integration between all first year subjects, i.e., basic science disciplines (anatomy, physiology, and biochemistry), animal management, and professional studies, while highlighting the…

  7. Effects of the Case-Based Instruction Method on the Experience of Learning

    Science.gov (United States)

    Amiri Farahani, Leila; Heidari, Tooba

    2014-01-01

    This semi-experimental study was conducted with twenty-seven midwifery students who were randomly allocated to either case-based instruction or lecture-based instruction groups. The selected subjects -- foetal intrapartum assessment, foetal antepartum assessment, ABO and Rh blood group system mismatch -- were presented in four ninety-minute…

  8. Primary exploration of the application of case based learning method in clinical probation teaching of the integrated curriculum of hematology

    Institute of Scientific and Technical Information of China (English)

    Zi-zhen XU; Ye-fei WANG; Yan WANG; Shu CHENG; Yi-qun HU; Lei DING

    2015-01-01

    Objective To explore the application and the effect of the case based learning(CBL)method in clinical probation teaching of the integrated curriculum of hematology among eight-year-program medical students.Methods The CBL method was applied to the experimental group,and the traditional approach for the control group.After the lecture,a questionnaire survey was conducted to evaluate the teaching effect in the two groups.Results The CBL method efficiently increased the students’interest in learning and autonomous learning ability,enhanced their ability to solve clinical problems with basic theoretic knowledge and cultivated their clinical thinking ability.Conclusion The CBL method can improve the quality of clinical probation teaching of the integrated curriculum of hematology among eight-year-program medical students.

  9. Evaluating core technology capacity based on an improved catastrophe progression method: the case of automotive industry

    Science.gov (United States)

    Zhao, Shijia; Liu, Zongwei; Wang, Yue; Zhao, Fuquan

    2017-01-01

    Subjectivity usually causes large fluctuations in evaluation results. Many scholars attempt to establish new mathematical methods to make evaluation results consistent with actual objective situations. An improved catastrophe progression method (ICPM) is constructed to overcome the defects of the original method. The improved method combines the merits of the principal component analysis' information coherence and the catastrophe progression method's none index weight and has the advantage of highly objective comprehensive evaluation. Through the systematic analysis of the influencing factors of the automotive industry's core technology capacity, the comprehensive evaluation model is established according to the different roles that different indices play in evaluating the overall goal with a hierarchical structure. Moreover, ICPM is developed for evaluating the automotive industry's core technology capacity for the typical seven countries in the world, which demonstrates the effectiveness of the method.

  10. An integrated assessment method of urban drainage system:A case study in Shenzhen City,China

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    In recent years,the urban drainage system in China is facing the dual pressure of renovation and construction.This requires that the integrated assessment for the planning and operation of the urban drainage system is obligatory.To evaluate the urban drainage system,an integrated assessment methodology based on the analytic hierarchy process (AHP),integrated simulation,and fuzzy assessment is established.This method is a multi-criteria decision adding approach to the assessment of the urban drainage system comprehensively.Through the integration of the Storm Water Management Model (SWMM),a simple wastewater treatment plant model,and a surface water quality model,an integrated modelling system for the urban drainage system is developed and applied as a key tool for assessment.Using the established method,a case study in Shenzhen City has been implemented to evaluate and compare two urban drainage system renovation plans,the distributed plan and the centralized plan.Because of the particularity of this case study,the established method is not applied entirely.Considering the water environmental impact,ecological impact,technological feasibility,and economic cost,the integrated performance of the distributed plan is better.As shown in this case study,the proposed method is found to be both effective and practical.

  11. Purists need not apply: the case for pragmatism in mixed methods research.

    Science.gov (United States)

    Florczak, Kristine L

    2014-10-01

    The purpose of this column is to describe several different ways of conducting mixed method research. The paradigms that underpin both qualitative and quantitative research are also considered along with a cursory review of classical pragmatism as it relates conducting mixed methods studies. Finally, the idea of loosely coupled systems as a means to support mixed methods studies is proposed along with several caveats to researchers who desire to use this new way of obtaining knowledge.

  12. A method to identify Resources of opportunity: illustration by an industrial case

    CERN Document Server

    Lyonnet, Barbara; Pralus, Magali; Guizzi, Ludovic; Habchi, Georges

    2011-01-01

    The aim of this study is to develop a method that would enable the company to prioritize the means contributing the most to its performance. The proposed method is based on the profit margin (an economical performance measure of the company), the customer's risk, the costs of maintenance and the employee's safety. The prioritization method of resources was applied to the data obtained from a small subcontracting business in mechanics. The theoretical foundations of this method are based on a multi-criteria approach using the attribution of criticality indexes for nine criteria linked to the financial loss.

  13. Proposition of Corrosion Expertise method for water pumping stations Application to the case of northern station of Fez city - Morocco

    Directory of Open Access Journals (Sweden)

    Iatimad AKHRIF

    2014-01-01

    Full Text Available In a constant progress of a regulatory and environmental context, the diagnostic and the expertise of the corrosion, the determination of its causes and factors, and the proposed solutions to this phenomenon represent a real challenge for all stakeholders of industry. We propose in this paper to a complete study of the corrosion risk in the case of water pumping stations, based on some industrial methods of risk analysis (FMEA and multiple laboratory tests and analysis. Finally we have proposed a masterplan (chart as perspectives, indicating the encounter corrosion problems in the case of the northern pumping station of Fez city (as case study. The masterplan includes also the corresponding solutions, that can stop or minimize degradation of the focused equipments by the various mechanisms of corrosion. Our proposals will serve as reference during futur installation of new water equipments, or during the study and choice of appropriate materials in the Water Studies Department.

  14. [Method for direct generation data for formatted case report forms based on requirement for data authenticity in actual clinical conditions].

    Science.gov (United States)

    Shao, Ming-Yi; Liu, Bao-Yan; He, Li-Yun; Zhang, Run-Shun

    2013-04-01

    Data authenticity is the basic requirement of clinical studies. In actual clinical conditions how to establish formatted case report forms (CRF) in line with the requirement for data authenticity is the key to ensure clinical data quality. On the basis of the characteristics of clinical data in actual clinical conditions, we determined elements for establishing formatted case report forms by comparing differences in data characteristics of CRFs in traditional clinical studies and in actual clinical conditions, and then generated formatted case report forms in line with the requirement for data authenticity in actual clinical conditions. The data of formatted CRFs generated in this study could not only meet the requirement for data authenticity of clinical studies in actual clinical conditions, but also comply with data management practices for clinical studies, thus it is deemed as a progress in technical methods.

  15. HV substation earth grid commissioning using current injection test (CIT method: Worst case scenario determination

    Directory of Open Access Journals (Sweden)

    M. Nassereddine, J. Rizk, M. Nagrial, A. Hellany

    2015-01-01

    Full Text Available The existing of the High Voltage (HV infrastructure creates a unique set of safety circumstances. The earthing system is one of the main elements to mitigate any unsafe conditions. Commissioning the earth grid certifies that the implemented system fulfills to the pertinent necessities. This paper endeavors to present vital information on how to perform the earth grid commissioning of an HV infrastructure. This paper will minutiae the minimum needs to guarantee the test will symbolize the actual fault case that the design was based on. A flow chart diagram is established and presented in this paper, which allows the determination of the most suitable injection route. The results of the case study are discussed, and the results are shown in this paper.

  16. ASSESSING CONVERGENCE OF THE MARKOV CHAIN MONTE CARLO METHOD IN MULTIVARIATE CASE

    Directory of Open Access Journals (Sweden)

    Daniel Furtado Ferreira

    2012-01-01

    Full Text Available The formal convergence diagnosis of the Markov Chain Monte Carlo (MCMC is made using univariate and multivariate criteria. In 1998, a multivariate extension of the univariate criterion of multiple sequences was proposed. However, due to some problems of that multivariate criterion, an alternative form of calculation was proposed in addition to the two new alternatives for multivariate convergence criteria. In this study, two models were used, one related to time series with two interventions and ARMA (2, 2 error and another related to a trivariate normal distribution, considering three different cases for the covariance matrix. In both the cases, the Gibbs sampler and the proposed criteria to monitor the convergence were used. Results revealed the proposed criteria to be adequate, besides being easy to implement.

  17. ESTIMATING HAZARD RATIOS IN NESTED CASE-CONTROL STUDIES BY MANTEL-HAENSZEL METHOD

    Institute of Scientific and Technical Information of China (English)

    张忠占

    2001-01-01

    In this article, a class of Mantel-Haenszel type estimators of hazard ratios in proportional hazards model is presented for simple nested case-control study. The estimators have the form of the Mantel-Haenszel estimator of odds ratios, and it is shown that the estimators are dually consistent, and asymptotically normal. Dually consistently estimated covariance matrices of the proposed estimators are also developed. An example is given to illustrate the estimators.

  18. Music behind Scores: Case Study of Learning Improvisation with "Playback Orchestra" Method

    Science.gov (United States)

    Juntunen, P.; Ruokonen, I.; Ruismäki, H.

    2015-01-01

    For music students in the early stages of learning, the music may seem to be hidden behind the scores. To support home practising, Juntunen has created the "Playback Orchestra" method with which the students can practise with the support of the notation program playback of the full orchestra. The results of testing the method with…

  19. Application of multi-locus analytical methods to identify interacting loci in case-control studies.

    NARCIS (Netherlands)

    Vermeulen, S.; Heijer, M. den; Sham, P.; Knight, J.

    2007-01-01

    To identify interacting loci in genetic epidemiological studies the application of multi-locus methods of analysis is warranted. Several more advanced classification methods have been developed in the past years, including multiple logistic regression, sum statistics, logic regression, and the multi

  20. PROBLEMS CONCERNING ALTERNATIVE EVALUATION METHODS: THE CASE OF SCIENCE AND TEHNOLOGY TEACHERS

    Directory of Open Access Journals (Sweden)

    Yasemin DEVECİOĞLU-KAYMAKÇI

    2009-11-01

    Full Text Available Recent changes on the Science and Tehnology (ST curriculum have required using alternative evaluation methods in learning and teaching process. The aim of this study is to determine the ST teachers’ problems while using the alternative evaluation methods during their courses. To achieve this, semi-structured interviews have been conducted with 10 ST teachers from different parts of Trabzon during the academic year 2008-2009. The data, analyzed qualitatively, reveals that the teachers have important difficulties in determining, using and evaluating these methods. At the end of the research, it has been concluded that besides the lack of physical infrastructure, labs and libraries, computer and other technologies in their schools, most of the teachers lack the knowledge and skills to implement these methods. The result of the study has shown that ST teachers need an adaptation process to appropriate the aims and importance of alternative evaluation methods effectively.

  1. Stress-based upper-bound method and convex optimization: case of the Gurson material

    Science.gov (United States)

    Pastor, Franck; Trillat, Malorie; Pastor, Joseph; Loute, Etienne

    2006-04-01

    A nonlinear interior point method associated with the kinematic theorem of limit analysis is proposed. Associating these two tools enables one to determine an upper bound of the limit loading of a Gurson material structure from the knowledge of the sole yield criterion. We present the main features of the interior point algorithm and an original method providing a rigorous kinematic bound from a stress formulation of the problem. This method is tested by solving in plane strain the problem of a Gurson infinite bar compressed between rough rigid plates. To cite this article: F. Pastor et al., C. R. Mecanique 334 (2006).

  2. Level set discrete element method for three-dimensional computations with triaxial case study

    Science.gov (United States)

    Kawamoto, Reid; Andò, Edward; Viggiani, Gioacchino; Andrade, José E.

    2016-06-01

    In this paper, we outline the level set discrete element method (LS-DEM) which is a discrete element method variant able to simulate systems of particles with arbitrary shape using level set functions as a geometric basis. This unique formulation allows seamless interfacing with level set-based characterization methods as well as computational ease in contact calculations. We then apply LS-DEM to simulate two virtual triaxial specimens generated from XRCT images of experiments and demonstrate LS-DEM's ability to quantitatively capture and predict stress-strain and volume-strain behavior observed in the experiments.

  3. Modified method of T-tube placement in cases of ruptured choledochal cyst having complete loss of anterior wall

    Directory of Open Access Journals (Sweden)

    Ahmed Intezar

    2011-01-01

    Full Text Available Survival rates for infants and children who have choledochal cyst with or without spontaneous rupture have improved dramatically in the past decades. Despite excellent long-term survival for patients with choledochal cyst who undergo elective surgery, many significant complications can occur in the patients being operated in emergency for rupture of the cyst. Spontaneous rupture of the cyst is one such problem resulting in considerable morbidity and mortality in these patients. Majority of surgeons manage these cases with T-tube external drainage. The conventional methods of T-tube placement for long period has remained simple as described in choledochotomies where there is no deficit of the walls of common bile duct (CBD. The present technique has been designed specially for the cases of ruptured choledochal cyst, where the wall of the CBD gets necrosed leaving behind a long gap between the two ends. In these cases, placement of T-tube with conventional method is not possible because there is no wall to suture together, and make the CBD water tight again to prevent leakage of bile. We found only two patients of spontaneous rupture of choledochal cyst with a long gap between two ends of CBD because of necrosed anterior wall. In both of these patients, it was not possible to put T-tube with traditional method and one would have to opt for primary definitive repair despite poor general condition of patients.

  4. The comparative method of language acquisition research: a Mayan case study.

    Science.gov (United States)

    Pye, Clifton; Pfeiler, Barbara

    2014-03-01

    This article demonstrates how the Comparative Method can be applied to cross-linguistic research on language acquisition. The Comparative Method provides a systematic procedure for organizing and interpreting acquisition data from different languages. The Comparative Method controls for cross-linguistic differences at all levels of the grammar and is especially useful in drawing attention to variation in contexts of use across languages. This article uses the Comparative Method to analyze the acquisition of verb suffixes in two Mayan languages: K'iche' and Yucatec. Mayan status suffixes simultaneously mark distinctions in verb transitivity, verb class, mood, and clause position. Two-year-old children acquiring K'iche' and Yucatec Maya accurately produce the status suffixes on verbs, in marked distinction to the verbal prefixes for aspect and agreement. We find evidence that the contexts of use for the suffixes differentially promote the children's production of cognate status suffixes in K'iche' and Yucatec.

  5. A dynamic method for charging-up calculations: the case of GEM

    CERN Document Server

    Correia, P M M; Azevedo, C D R; Silva, A L M; Veenhof, R; Nemallapudi, Mythra Varun; Veloso, J F C A

    2014-01-01

    The simulation of Micro Pattern Gaseous Detectors (MPGDs) signal response is an important and powerful tool for the design and optimization of such detectors. However, several attempts to simulate exactly the effective charge gain have not been completely successful. Namely, the gain stability over time has not been fully understood. Charging-up of the insulator surfaces have been pointed as one of the responsible for the difference between experimental and Monte Carlo results. This work describes two iterative methods to simulate the charging-up in one MPGD device, the Gas Electron Multiplier (GEM). The first method uses a constant step for avalanches time evolution, very detailed, but slower to compute. The second method uses a dynamic step that improves the computing time. Good agreement between both methods was reached. Despite of comparison with experimental results shows that charging-up plays an important role in detectors operation, should not be the only responsible for the difference between simulat...

  6. Natural science methods in field archaeology, with the case study of Crimea

    Science.gov (United States)

    Smekalova, T. N.; Yatsishina, E. B.; Garipov, A. S.; Pasumanskii, A. E.; Ketsko, R. S.; Chudin, A. V.

    2016-07-01

    The natural science methods applied in archaeological field survey are briefly reviewed. They are classified into several groups: remote sensing (analysis of space and airspace photographs, viewshed analysis, study of detailed topographic and special maps, and three-dimensional photogrammetry), geophysical survey, and analysis of cultural layer elements (by geochemical, paleosol, and other methods). The most important principle is the integration of complementary nondestructive and fast natural science methods in order to obtain the most complete and reliable results. Emphasis is placed on the consideration of geophysical methods of the study, primarily, magnetic exploration. A multidisciplinary study of the monuments of ancient Chersonesos and its "barbarian" environment is described as an example of successful application of a complex technique.

  7. A Comparison between Neural Networks and Traditional Forecasting Methods: A Case Study

    Directory of Open Access Journals (Sweden)

    C. A. Mitrea

    2009-10-01

    Full Text Available Forecasting accuracy drives the performance of inventory management. This study is to investigate and compare different forecasting methods like Moving Average (MA and Autoregressive Integrated Moving Average (ARIMA with Neural Networks (NN models as Feed-forward NN and Nonlinear Autoregressive network with eXogenous inputs (NARX. Data used to forecast is acquired from inventory database of Panasonic Refrigeration Devices Company located in Singapore. Results have shown that forecasting with NN offers better performance in comparison with traditional methods.

  8. Investigating Attitudes toward Instructional Principles and Methods Course of Pedagogical Formation Students: Inonu University Case

    OpenAIRE

    ŞAN, İsmail

    2016-01-01

    The purpose of this study is investigating the attitudes toward Teaching Principles and Methods course of pedagogical formation students at Inonu University.  For this purpose, data was collected via “Attitude Scale for Teaching Principles and Methods Course” (MEB, 2012) from 368 students that are voluntary for applying to this research, in the 2014-2015 spring semester. At the last week of the semester, before the final examinations the attitude scale was applied to the students. The scale i...

  9. Integral Reduction by Unitarity Method for Two-loop Amplitudes: A Case Study

    CERN Document Server

    Feng, Bo; Huang, Rijun; Zhou, Kang

    2014-01-01

    In this paper, we generalize the unitarity method to two-loop diagrams and use it to discuss the integral bases of reduction. To test out method, we focus on the four-point double-box diagram as well as its related daughter diagrams, i.e., the double-triangle diagram and the triangle-box diagram. For later two kinds of diagrams, we have given complete analytical results in general (4-2\\eps)-dimension.

  10. A modified nodal pressure method for calculating flow distribution in hydraulic circuits for the case of unconventional closing relations

    Directory of Open Access Journals (Sweden)

    Egor M. Mikhailovsky

    2015-06-01

    Full Text Available We proposed a method for numerically solving the problem of flow distribution in hydraulic circuits with lumped parameters for the case of random closing relations. The conventional and unconventional types of relations for the laws of isothermal steady fluid flow through the individual hydraulic circuit components are studied. The unconventional relations are presented by those given implicitly by the flow rate and dependent on the pressure of the working fluid. In addition to the unconventional relations, the formal conditions of applicability were introduced. These conditions provide a unique solution to the flow distribution problem. A new modified nodal pressure method is suggested. The method is more versatile in terms of the closing relation form as compared to the unmodified one, and has lower computational costs as compared to the known technique of double-loop iteration. The paper presents an analysis of the new method and its algorithm, gives a calculated example of a gas transportation network, and its results.

  11. New methods for solving a vertex p-center problem with uncertain demand-weighted distance: A real case study

    Directory of Open Access Journals (Sweden)

    Javad Nematian

    2015-04-01

    Full Text Available Vertex and p-center problems are two well-known types of the center problem. In this paper, a p-center problem with uncertain demand-weighted distance will be introduced in which the demands are considered as fuzzy random variables (FRVs and the objective of the problem is to minimize the maximum distance between a node and its nearest facility. Then, by introducing new methods, the proposed problem is converted to deterministic integer programming (IP problems where these methods will be obtained through the implementation of the possibility theory and fuzzy random chance-constrained programming (FRCCP. Finally, the proposed methods are applied for locating bicycle stations in the city of Tabriz in Iran as a real case study. The computational results of our study show that these methods can be implemented for the center problem with uncertain frameworks.

  12. Toward a quality guide to facilitate the transference of analytical methods from research to testing laboratories: a case study.

    Science.gov (United States)

    Bisetty, Krisnha; Gumede, Njabulo Joyfull; Escuder-Gilabert, Laura; Sagrado, Salvador

    2009-01-01

    At present, there is no single viewpoint that defines QA strategies in analytical chemistry. On the other hand, there are no unique protocols defining a set of analytical tasks and decision criteria to be performed during the method development phase (e.g., by a single research laboratory) in order to facilitate the transference to the testing laboratories intending to adapt, validate, and routinely use this method. This study proposes general criteria, a priori valid for any developed method, recommended as a provisional quality guide containing the minimum internal tasks necessary to publish new analytical method results. As an application, the selection of some basic internal quality tasks and the corresponding accepted criteria are adapted to a concrete case study: indirect differential pulse polarographic determination of nitrate in water samples according to European Commission requisites. Extra tasks to be performed by testing laboratories are also outlined.

  13. A LINEAR PROGRAMMING METHOD TO ENHANCE RESOURCE UTILIZATION CASE OF ETHIOPIAN APPAREL SECTOR

    Directory of Open Access Journals (Sweden)

    Gezahegn Tesfaye

    2016-06-01

    Full Text Available The Ethiopian industrial development strategy is characterized by export-led and labor intensive industrialization. The country is emerging as the most important investment destination in its apparel sector. Thought this sector is expected to generate more income from the export market, its export earnings remain trivial mainly due to the inefficient organizational resource utilization. One of the competent techniques that help companies to efficiently improve the use of their resources to increase their profit is linear programming. In apparel manufacturing firms, efficient use of materials such as fabrics and sewing threads and processing time at different stages of production as well as minimization of labor and materials cost are necessary to enhance their profitability. Cutting, sewing, and finishing operations deserve more attention for apparel process optimization. However, the issue of proper resource allocation remains an unsolved problem within the Ethiopian apparel industry. The aim of this research is to devise efficient resource utilization mechanism for Ethiopian apparel sector to improve their resource utilization and profitability, taking one of the garment factories engaged in the export market as a case study. Five types of products the company is currently producing, the amount of resources employed to produce each unit of the products, and the value of profit per unit from the sale of each products have been collected from the case company. The monthly availability of resources utilized and the monthly production volume of the five products have also been collected from the company. The data gathered was mathematically modeled using a linear programming technique, and solved using MS-Excel solver. The findings of the study depicts that all of the organizational resources are severely underutilized. This research proved that the resource utilization of the case company can be improved from 46.41% of the current resource

  14. Invited commentary: application of case-crossover methods to investigate triggers of preterm birth.

    Science.gov (United States)

    Darrow, Lyndsey A

    2010-11-15

    Properties of the case-crossover design have appeal for investigation of acute triggers of preterm birth. Measured and unmeasured time-invariant risk factors are controlled by design, such that maternal race, socioeconomic status, and other personal factors will not confound the exposure-preterm birth association. In this issue of the Journal, Basu et al. (Am J Epidemiol. 2010;172(10):1108-1117) apply the case-crossover approach to assess the short-term relation between ambient apparent temperature and preterm birth. Novel application of the design to preterm birth, a "fatal" event exhibiting dramatic within-subject changes in risk, merits a review of the assumptions underlying the design. Implications of the referent time periods selected and the potential for confounding by seasonal patterns of conception are discussed in this commentary. The provocative associations observed by Basu et al. between high ambient apparent temperature and preterm birth should stimulate follow-up analyses and could ultimately have important public health implications. Future research can also help delineate the relative strengths and weaknesses of different temporal analytic strategies for investigating short-term associations between various exposures and preterm birth.

  15. Fibrodysplasia Ossificans Progressiva; Report of A Case and Review of the Diagnostic Methods

    Directory of Open Access Journals (Sweden)

    Jahanbakhsh Hashemi

    2009-01-01

    Full Text Available "nFibrodysplasia ossificans progressiva (FOP is a rare autosomal dominant disorder, characterized by painful swelling of muscles and connective tissue in the early years of life then leading to ossification after 4-5 years. "nWe report a case of palpable masses in the frontal, lower cervical paraspinal and left periscapular muscles in a 2-year-old boy. When he was referred to our hospital, ectopic ossifications were not visible on the plain radiographs and CT scan. He was born with hallux valgus. Despite this hallmark he was referred to the hospital by the family physician and pediatrician with the primary diagnosis of hematoma, but more investigation indicated FOP. The patient was released from the hospital with NSAID and parent education. The importance of this case was that in spite of the typical early-onset presentation of FOP which happened more than one year ago and the fact that the patient's mother was a physician who had consulted with many specialists in this one year period, the patient had been missed . This misdiagnosis in FOP patients causes catastrophic unnecessary procedures and also indicates awareness and knowledge of general physicians, radiologists and other specialists of FOP (at least in early stage is low.   

  16. Development of a semi-automated method for subspecialty case distribution and prediction of intraoperative consultations in surgical pathology

    Directory of Open Access Journals (Sweden)

    Raul S Gonzalez

    2015-01-01

    Full Text Available Background: In many surgical pathology laboratories, operating room schedules are prospectively reviewed to determine specimen distribution to different subspecialty services and to predict the number and nature of potential intraoperative consultations for which prior medical records and slides require review. At our institution, such schedules were manually converted into easily interpretable, surgical pathology-friendly reports to facilitate these activities. This conversion, however, was time-consuming and arguably a non-value-added activity. Objective: Our goal was to develop a semi-automated method of generating these reports that improved their readability while taking less time to perform than the manual method. Materials and Methods: A dynamic Microsoft Excel workbook was developed to automatically convert published operating room schedules into different tabular formats. Based on the surgical procedure descriptions in the schedule, a list of linked keywords and phrases was utilized to sort cases by subspecialty and to predict potential intraoperative consultations. After two trial-and-optimization cycles, the method was incorporated into standard practice. Results: The workbook distributed cases to appropriate subspecialties and accurately predicted intraoperative requests. Users indicated that they spent 1-2 h fewer per day on this activity than before, and team members preferred the formatting of the newer reports. Comparison of the manual and semi-automatic predictions showed that the mean daily difference in predicted versus actual intraoperative consultations underwent no statistically significant changes before and after implementation for most subspecialties. Conclusions: A well-designed, lean, and simple information technology solution to determine subspecialty case distribution and prediction of intraoperative consultations in surgical pathology is approximately as accurate as the gold standard manual method and requires less

  17. Can health professionals learn qualitative evaluation methods on the World Wide Web? A case example.

    Science.gov (United States)

    Steckler, A; Farel, A; Bontempi, J B; Umble, K; Polhamus, B; Trester, A

    2001-12-01

    The Enhancing Data Utilization Skills through Information Technology (EDUSIT) project trained Maternal and Child Health professionals to collect, analyze and interpret data via a year-long web-based course. The overall goal of the project was to strengthen the technology and analytic skills of the public health workforce. This article describes and analyzes a web-based module for training public health professionals to use qualitative research and evaluation methods that was one of six offered within the EDUSIT project. The qualitative module consisted of six units: overview of qualitative methods, planning qualitative studies, conducting field observations, qualitative interviewing, analyzing qualitative data and presenting qualitative findings. Evaluation results found no statistically significant changes in specific knowledge or beliefs about qualitative methods. However, the change in participants' self-efficacy was statistically significant. Participants' self-reports also showed significant changes in perceived skill levels in 'collecting qualitative data through an interview' and 'analyzing and interpreting qualitative data'. Most participants rated each lesson within the qualitative methods module as valuable, and most found the teaching methods used satisfactory, emphasizing the value of both the didactic teaching and the practical exercises and team project. The most common difficulty reported was finding the time to complete the module requirements while also working full-time. Implications of these findings for web-based teaching of public health professionals are discussed.

  18. Comparison of sensitivity analysis methods for pollutant degradation modelling: a case study from drinking water treatment.

    Science.gov (United States)

    Neumann, Marc B

    2012-09-01

    Five sensitivity analysis methods based on derivatives, screening, regression, variance decomposition and entropy are introduced, applied and compared for a model predicting micropollutant degradation in drinking water treatment. The sensitivity analysis objectives considered are factors prioritisation (detecting important factors), factors fixing (detecting non-influential factors) and factors mapping (detecting which factors are responsible for causing pollutant limit exceedances). It is shown how the applicability of methods changes in view of increasing interactions between model factors and increasing non-linearity between the model output and the model factors. A high correlation is observed between the indices obtained for the objectives factors prioritisation and factors mapping due to the positive skewness of the probability distributions of the predicted residual pollutant concentrations. The entropy-based method which uses the Kullback-Leibler divergence is found to be particularly suited when assessing pollutant limit exceedances.

  19. A CASE STUDY OF ACADEMIC WRITING DEVELOPMENT THROUGH PRINCIPLED VERSUS STANDARD CLT METHOD AT BINUS UNIVERSITY

    Directory of Open Access Journals (Sweden)

    Almodad Biduk Asmani

    2013-09-01

    Full Text Available The purpose of the research project is to investigate how far the academic writing skills of Binus University students can be developed through two conflicting CLT methods: standard and principled. The research project is expected to result in computer-animated format which can be used as one of the main tools in teaching and learning grammar at Binus University. The research project uses the qualitative approach, and thus uses verbal data. The research project involves two subject groups (experimental and control. The experimental group will receive the treatment of grammar learning by using the Principled CLT approach, while the control group receives the standard CLT approach. Survey is then conducted to the two groups so as to find out their comments on the two teaching methods. From the results of the questionnaires, it is found that Principled CLT method is favored for its knowledge and accuracy factors, while the Standard CLT is preferred for its fun and independence factors.

  20. Mobile teledermatopathology: using a tablet PC as a novel and cost-efficient method to remotely diagnose dermatopathology cases.

    Science.gov (United States)

    Speiser, Jodi J; Hughes, Ian; Mehta, Vikas; Wojcik, Eva M; Hutchens, Kelli A

    2014-01-01

    : Dermatopathology has relatively few studies regarding teledermatopathology and none have addressed the use of new technologies, such as the tablet PC. We hypothesized that the combination of our existing dynamic nonrobotic system with a tablet PC could provide a novel and cost-efficient method to remotely diagnose dermatopathology cases. 93 cases diagnosed by conventional light microscopy at least 5 months earlier by the participating dermatopathologist were retrieved by an electronic pathology database search. A high-resolution video camera (Nikon DS-L2, version 4.4) mounted on a microscope was used to transmit digital video of a slide to an Apple iPAD2 (Apple Inc, Cupertino, CA) at the pathologist's remote location via live streaming at an interval time of 500 ms and a resolution of 1280/960 pixels. Concordance to the original diagnosis and the seconds elapsed to reaching the diagnosis were recorded. 24.7% (23/93) of cases were melanocytic, 70.9% (66/93) were nonmelanocytic, and 4.4% (4/93) were inflammatory. About 92.5% (86/93) of cases were diagnosed on immediate viewing (<5 seconds), with the average time to diagnosis at 40.2 seconds (range: 10-218 seconds). Of the cases diagnosed immediately, 98.8% (85/86) of the telediagnoses were concordant with the original. Telepathology performed via a tablet PC may serve as a reliable and rapid technique for the diagnosis of routine cases with some diagnostic caveats in mind. Our study established a novel and cost-efficient solution for those institutions that may not have the capital to purchase either a dynamic robotic system or a virtual slide system.

  1. CASE OF SUCCESSFUL APPLICATION OF METHOD FOR 3D VISUALIZATION AND MODELING IN THORACIC ONCOLOGY

    Directory of Open Access Journals (Sweden)

    S. V. Shchadenko

    2016-01-01

    Full Text Available Aim. The application of method of 3D-visualization and modeling in thoracic oncology is described.Materials and methods. The block diagram of system of 3D-visualization and modeling consisting of six stages is shown. The reconstructions of anatomic computer 3D-models of rib cage and tumor were performed for the patient with cancer (plasma cell myeloma. The tumor size and its topographic anatomy relatively to neighboring organs, bones and soft tissues were identified. Results.The obtained data had been used to plan surgical intervention, which was successfully conducted at Thoracic surgery department ofTomskRegionalClinicalHospital. 

  2. Using service design methods for B2b service brand concept development: Case company

    OpenAIRE

    Molina Escalante, Hugo

    2014-01-01

    A short time before this study was initiated, a small B2b service company had just began op-erating its business without a brand of it’s own. The company owners were looking to design an innovative brand for their business. The purpose of this thesis was to develop the brand for this service Company in the B2b context, using practical service design and Strategic design research methods. This thesis report represents a framework for developing a B2b service brand using research methods c...

  3. A novel method of airway management in a case of penetrating neck injury

    Directory of Open Access Journals (Sweden)

    Malavika Kulkarni

    2016-01-01

    Full Text Available Direct injury to airway is a rare event and also a challenge to anaesthesiologist and surgeon. We present a case report of open tracheal injury with right pneumothorax in a young male following assault with a sharp weapon. In spite of a chest tube in situ, the patient came with collapse of one lung and tachypnoea which required surgical exploration. Lower airway was evaluated by fibre-optic bronchoscopy through the open tracheal wound while he was awake and tracheal tube was passed over the bronchoscope. There was no vascular or oesophageal injury detected. Although there was a pleural tear, there were no signs of injury to lung parenchyma. After evaluation, end to end anastomosis of the trachea was planned, for which orotracheal tube was passed with surgical assistance. Patient was shifted to post-operative high dependency unit and was electively ventilated for 7 days and was later successfully extubated under fibre-optic bronchoscope guidance.

  4. A novel method using Seldinger's technique for submental intubation in major craniomaxillofacial fractures: A case series.

    Science.gov (United States)

    Saheb, Shaik Mastan; Nath, Vemuri Nagendra; Kumar, K Phani; Padmaja, Pilli Parama Geetha

    2014-01-01

    Airway management is a challenge to anesthesiologists particularly in maxillofacial surgeries. The oral tracheal tube is unsuitable because it interferes with the surgical field and prevents dental occlusion. Nasotracheal intubation may not always be possible due to structural deformity or trauma to the nasal bones. Tracheostomy and submental intubation have their drawbacks. To overcome these shortcomings we used Percutaneous Dilatational Tracheostomy Kit (PDTK) to modify the technique of submental intubation. Serial dilatations were performed over the guide wire before passing the tracheal tube by submental route, using the PDT kit in four patients. Submental intubation could be achieved in all the four cases with this technique and there were no associated complications. Seldinger's technique is a simple and easy technique with minimal bleeding, imperceptible scar, and more importantly anesthesiologists feel more comfortable because of their familiarity with the Seldinger technique.

  5. An empirical method that separates irreversible stem radial growth from bark water content changes in trees: theory and case studies.

    Science.gov (United States)

    Mencuccini, Maurizio; Salmon, Yann; Mitchell, Patrick; Hölttä, Teemu; Choat, Brendan; Meir, Patrick; O'Grady, Anthony; Tissue, David; Zweifel, Roman; Sevanto, Sanna; Pfautsch, Sebastian

    2017-02-01

    Substantial uncertainty surrounds our knowledge of tree stem growth, with some of the most basic questions, such as when stem radial growth occurs through the daily cycle, still unanswered. We employed high-resolution point dendrometers, sap flow sensors, and developed theory and statistical approaches, to devise a novel method separating irreversible radial growth from elastic tension-driven and elastic osmotically driven changes in bark water content. We tested this method using data from five case study species. Experimental manipulations, namely a field irrigation experiment on Scots pine and a stem girdling experiment on red forest gum trees, were used to validate the theory. Time courses of stem radial growth following irrigation and stem girdling were consistent with a-priori predictions. Patterns of stem radial growth varied across case studies, with growth occurring during the day and/or night, consistent with the available literature. Importantly, our approach provides a valuable alternative to existing methods, as it can be approximated by a simple empirical interpolation routine that derives irreversible radial growth using standard regression techniques. Our novel method provides an improved understanding of the relative source-sink carbon dynamics of tree stems at a sub-daily time scale.

  6. Data Warehouse Design with Kimball Method: Case Study of Farhrenheit Manufacturing Systems

    Directory of Open Access Journals (Sweden)

    Widianty

    2015-12-01

    Full Text Available Competition in the business world that increasingly stringent requires management to make decisions accurately and quickly. It is also felt by Farhenheit as entrepreneurs. To achieve thier forte in competing in the global competition, he needs systems like strategic decision makers which is up-to-date reliable and fast. Then the solution of area manufatur datawarehouse design is necessary to support the above objectives,i.e. : the right and fast decisions. However, Fahrenheit only has ERP as their core system currently and they do not have management support system. They have some difficulty to understand some problems and do better analysis. There are some datawarehouse development methodologies. Methods that will be used for the development of datawarehouse design is Kimball Method. Kimball method was chosen because of its development process that follows the business process is very suitable for the development of datawarehouse gradually to a company. Kimball's method gives a mart for the related business processes.This study is conducted by interview and survey from several senior managers and directors in Fahrenheit to know about their requirement and how they do analyzesis currently

  7. Incorporating Experiential Teaching Methods in Sustainable Natural Resources Curriculum: A Case Study

    Science.gov (United States)

    Quesada-Pineda, Henry J.; Adams, Erica; Hammett, A. L. Tom

    2011-01-01

    This article presents results of utilizing a college course design that is based on experiential learning theory and experiential education methods. The subject matter of the course included how human dimensions, economic development, and policy affect the sustainability of natural resources such as water, wildlife, and forestry in a highly ranked…

  8. Multisymplectic Structure-Preserving in Simple Finite Element Method in High Dimensional Case

    Institute of Scientific and Technical Information of China (English)

    BAI Yong-Qiang; LIU Zhen; PEI Ming; ZHENG Zhu-Jun

    2003-01-01

    In this paper, we study a finite element scheme of some semi-linear elliptic boundary value problems inhigh-dimensional space. With uniform mesh, we find that, the numerical scheme derived from finite element method cankeep a preserved multisymplectic structure.

  9. Evaluation of multiple variate selection methods from a biological perspective: A nutrigenomics case study

    NARCIS (Netherlands)

    Tapp, H.S.; Radonjic, M.; Kemsley, E.K.; Thissen, U.

    2012-01-01

    Genomics-based technologies produce large amounts of data. To interpret the results and identify the most important variates related to phenotypes of interest, various multivariate regression and variate selection methods are used. Although inspected for statistical performance, the relevance of mul

  10. Delineating species with DNA barcodes: a case of taxon dependent method performance in moths.

    Directory of Open Access Journals (Sweden)

    Mari Kekkonen

    Full Text Available The accelerating loss of biodiversity has created a need for more effective ways to discover species. Novel algorithmic approaches for analyzing sequence data combined with rapidly expanding DNA barcode libraries provide a potential solution. While several analytical methods are available for the delineation of operational taxonomic units (OTUs, few studies have compared their performance. This study compares the performance of one morphology-based and four DNA-based (BIN, parsimony networks, ABGD, GMYC methods on two groups of gelechioid moths. It examines 92 species of Finnish Gelechiinae and 103 species of Australian Elachistinae which were delineated by traditional taxonomy. The results reveal a striking difference in performance between the two taxa with all four DNA-based methods. OTU counts in the Elachistinae showed a wider range and a relatively low (ca. 65% OTU match with reference species while OTU counts were more congruent and performance was higher (ca. 90% in the Gelechiinae. Performance rose when only monophyletic species were compared, but the taxon-dependence remained. None of the DNA-based methods produced a correct match with non-monophyletic species, but singletons were handled well. A simulated test of morphospecies-grouping performed very poorly in revealing taxon diversity in these small, dull-colored moths. Despite the strong performance of analyses based on DNA barcodes, species delineated using single-locus mtDNA data are best viewed as OTUs that require validation by subsequent integrative taxonomic work.

  11. Algebraic method for constructing singular steady solitary waves: A case study

    CERN Document Server

    Clamond, Didier; Galligo, André

    2016-01-01

    This article describes the use of algebraic methods in a phase plane analysis of ordinary differential equations. The method is illustrated by the study of capillary-gravity steady surface waves propagating in shallow water. We consider the (fully nonlinear, weakly dispersive) Serre-Green-Naghdi equations with surface tension, because it provides a tractable model that, in the same time, is not too simple so the interest of the method can be emphasised. In particular, we analyse a special class of solutions, the solitary waves, which play an important role in many fields of Physics. In capillary-gravity regime, there are two kinds of localised infinitely smooth travelling wave solutions -- solitary waves of elevation and of depression. However, if we allow the solitary waves to have an angular point, the "zoology" of solutions becomes much richer and the main goal of this study is to provide a complete classification of such singular localised solutions using the methods of the effective Algebraic Geometry.

  12. 皮炎外治验案%Proved Cases of Cytitis by External Treatment Methods

    Institute of Scientific and Technical Information of China (English)

    周宝宽; 周探

    2013-01-01

    目的:总结中药外治皮炎经验.方法:以医案形式,融理、法、方、药为一体进行阐述.结果:清热凉血、泻火解毒、祛湿敛疮、养血润燥等中药外治激素性皮炎、脂溢性皮炎、接触性皮炎、日光性皮炎,疗效显著.结论:中药外治皮炎直达病所,起效快,疗效肯定.%Objective:To summarize ZHOU Baokuan's clinical experience on cytitis by external treatment methods of traditional Chinese medicine.Methods:Principles,methods,formulae and medicinals of hypomnesia were discussed based on medical records.Results:Traditional Chinese medicine of removing heat to cool blood,purging fire for removing toxin,dispelling dampness and wound healing,were given for steroid dermatitis,seborrheic dermatitis,contact dermatitis,solar dermatitis,it shows significant curative effect.Conclusions:External treatment methods of traditional Chinese medicine can introduce the drug to the affected area,showing good effect on cytitis with rapid action time.

  13. Initiating Self-Assessment Strategies in Novice Physiotherapy Students: A Method Case Study

    Science.gov (United States)

    Young, Catherine

    2013-01-01

    Student self- and peer-assessment strategies ideally are instigated early in programmes for health professionals. This study presents an innovative method of stimulating critical evaluation of clinical skills learned in the practical class setting for first year physiotherapy students. Twice in the semester (beginning and end) students assessed…

  14. A case study on the design and development of minigames for research methods and statistics

    Directory of Open Access Journals (Sweden)

    P. Van Rosmalen

    2014-08-01

    Full Text Available Research methodology involves logical reasoning and critical thinking skills which are core competences in developing a more sophisticated understanding of the world. Acquiring expertise in research methods and statistics is not easy and poses a significant challenge for many students. The subject material is challenging because it is highly abstract and complex and requires the coordination of different but inter-related knowledge and skills that are all necessary to develop a coherent and usable skills base in this area. Additionally, while many students embrace research methods enthusiastically, others find the area dry, abstract and boring. In this paper we discuss the design and the first evaluation of a set of mini-games to practice research methods. Games are considered to be engaging and allow students to test out scenarios which provide concrete examples in a way that they typically only do once they are out in the field. The design of a game is a complex task. First, we describe how we used cognitive task analysis to identify the knowledge and competences required to develop a comprehensive and usable understanding of research methods. Next, we describe the games designed and how 4C-ID, an instructional design model, was used to underpin the games with a sound instructional design basis. Finally, the evaluation approach is discussed and how the findings of the first evaluation phase were used to improve the games.

  15. Algebraic method for constructing singular steady solitary waves: a case study

    Science.gov (United States)

    Clamond, Didier; Dutykh, Denys; Galligo, André

    2016-07-01

    This article describes the use of algebraic methods in a phase plane analysis of ordinary differential equations. The method is illustrated by the study of capillary-gravity steady surface waves propagating in shallow water. We consider the (fully nonlinear, weakly dispersive) Serre-Green-Naghdi equation with surface tension, because it provides a tractable model that, at the same time, is not too simple, so interest in the method can be emphasized. In particular, we analyse a special class of solutions, the solitary waves, which play an important role in many fields of physics. In capillary-gravity regime, there are two kinds of localized infinitely smooth travelling wave solutions-solitary waves of elevation and of depression. However, if we allow the solitary waves to have an angular point, then the `zoology' of solutions becomes much richer, and the main goal of this study is to provide a complete classification of such singular localized solutions using the methods of the effective algebraic geometry.

  16. The Inquiry of the Junior Graded Teaching Method--A Case Study

    Institute of Scientific and Technical Information of China (English)

    石慧

    2014-01-01

    Graded teaching divides students into classes in which students are at the same level. Graded teaching is the variant and development of traditional methods. This article makes some introduction of graded teaching, has a review of the theoretical development and tries to analyses its advantages and disadvantages. Lastly, we have some specific requirements for teachers.

  17. Is the Multigrid Method Fault Tolerant? The Two-Grid Case

    Energy Technology Data Exchange (ETDEWEB)

    Ainsworth, Mark [Brown Univ., Providence, RI (United States). Division of Applied Mathematics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computer Science and Mathematics Division; Glusa, Christian [Brown Univ., Providence, RI (United States). Division of Applied Mathematics

    2016-06-30

    The predicted reduced resiliency of next-generation high performance computers means that it will become necessary to take into account the effects of randomly occurring faults on numerical methods. Further, in the event of a hard fault occurring, a decision has to be made as to what remedial action should be taken in order to resume the execution of the algorithm. The action that is chosen can have a dramatic effect on the performance and characteristics of the scheme. Ideally, the resulting algorithm should be subjected to the same kind of mathematical analysis that was applied to the original, deterministic variant. The purpose of this work is to provide an analysis of the behaviour of the multigrid algorithm in the presence of faults. Multigrid is arguably the method of choice for the solution of large-scale linear algebra problems arising from discretization of partial differential equations and it is of considerable importance to anticipate its behaviour on an exascale machine. The analysis of resilience of algorithms is in its infancy and the current work is perhaps the first to provide a mathematical model for faults and analyse the behaviour of a state-of-the-art algorithm under the model. It is shown that the Two Grid Method fails to be resilient to faults. Attention is then turned to identifying the minimal necessary remedial action required to restore the rate of convergence to that enjoyed by the ideal fault-free method.

  18. Stratosphere-troposphere exchange from the Lagrangian perspective: a case study and method sensitivities

    Directory of Open Access Journals (Sweden)

    M. S. Bourqui

    2004-06-01

    Full Text Available An important part of extra-tropical stratosphere-to-troposphere transport occurs in association with baroclinic wave breaking and cut-off decay at the tropopause. In the last decade many studies have attempted to estimate stratosphere-troposphere exchange (STE in such synoptic events with various methods, and more recently efforts have been put on inter-comparing these methods. However, large uncertainties remain on the sensitivities to methods intrinsic parameters, and on the best measure for STE with regard to end effects on chemistry.

    The goal of the present study is to address these two fundamental issues in the context of the application of a trajectory-based Lagrangian method, which has been applied in the past to climatological studies and has also been involved in inter-comparison studies, to a typical baroclinic wave breaking event.

    The analysis sheds light on (i the fine mesoscale temporal and spatial structures that are associated with episodic, rapid inflows of stratospheric air into the troposphere; (ii the spatial resolution of 1°×1° required to reasonably capture STE fluxes in such a wave breaking event; (iii the effective removal of spurious exchange events using a threshold residence time; (iv the relevance of residence time distributions for capturing the effective chemical forcing of STE; (v the large differences in the temporal evolution and geographical distribution of STE fluxes across the 2 and the 4 potential vorticity unit iso-surface definitions of the tropopause.

  19. Provenance of pottery determined by soil physicochemical and chemometric methods: A case study from Frederiksgave, Ghana

    DEFF Research Database (Denmark)

    Rasmussen, Lars Holm; Bredwa-Mensah, Y.; Borggaard, Ole K.;

    2009-01-01

    The suitability of using traditional soil chemical and mineralogical methods combined with chemometrics to trace provenance of archaeological samples was tested on potsherds from Frederiksgave, a former Danish plantation in southern Ghana, in use from 18301850. Soil and six potsherds from Frederi...

  20. Developing Mathematical Knowledge for Teaching in a Methods Course: The Case of Function

    Science.gov (United States)

    Steele, Michael D.; Hillen, Amy F.; Smith, Margaret S.

    2013-01-01

    This study describes teacher learning in a teaching experiment consisting of a content-focused methods course involving the mathematical knowledge for teaching function. Prospective and practicing teachers in the course showed growth in their ability to define function, to provide examples of functions and link them to the definition, in the…

  1. Building America Case Study: Field Testing of Compartmentalization Methods for Multifamily Construction (Fact Sheet)

    Energy Technology Data Exchange (ETDEWEB)

    2015-01-01

    The 2012 IECC has an airtightness requirement of 3 air changes per hour at 50 Pascals test pressure for both single family and multifamily construction in Climate Zones 3-8. Other programs (LEED, ASHRAE 189, ASHRAE 62.2) have similar or tighter compartmentalization requirements, thus driving the need for easier and more effective methods of compartmentalization in multifamily buildings.

  2. A Framework for Mixing Methods in Quantitative Measurement Development, Validation, and Revision: A Case Study

    Science.gov (United States)

    Luyt, Russell

    2012-01-01

    A framework for quantitative measurement development, validation, and revision that incorporates both qualitative and quantitative methods is introduced. It extends and adapts Adcock and Collier's work, and thus, facilitates understanding of quantitative measurement development, validation, and revision as an integrated and cyclical set of…

  3. Weeding the Forest Hill Branch of Toronto Public Library by the Slote Method: A Test Case.

    Science.gov (United States)

    McKee, Penelope

    1981-01-01

    Describes a two-part book circulation use study conducted to find a simple inexpensive and effective method of weeding a public library branch collection, to determine whether weeding increases circulation, and to compare results with Slote's results. Seven tables, one appendix, and 32 references are provided. (RBF)

  4. A Case Study of the Performance of Different Detrending Methods in Turbulent-Flux Estimation

    Science.gov (United States)

    Donateo, Antonio; Cava, Daniela; Contini, Daniele

    2017-02-01

    The performance of different detrending methods in removing the low-frequency contribution to the calculation of turbulent fluxes is investigated. The detrending methods are applied to the calculation of turbulent fluxes of different scalars (temperature, ultrafine particle number concentration, carbon dioxide and water vapour concentration), collected at two different measurement sites: one urban and one suburban. We test and compare the performance of filtering methodologies frequently used in real-time and automated procedures (mean removal, linear detrending, running mean, autoregressive filter) with the results obtained from a reference method, which is a spectral filter based on the Fourier decomposition of the time series. In general, the largest differences are found in the comparison between the reference and the mean-removal procedures. The linear detrending and running-mean procedures produce comparable results, and turbulent-flux estimations in better agreement with the reference procedure than those obtained with the mean-removal procedure. The best agreement between the running mean and the spectral filter is achieved with a time window of 15 min at both sites. For all the variables studied, average fluxes calculated using the autoregressive filter are increasingly overestimated for a time constant τ compared with that obtained using the spectral filter. The minimization of the difference between the two detrending methods is achieved with a time constant of 120 s, with similar behaviour observed at both sites.

  5. Diffuse interface methods for inverse problems: case study for an elliptic Cauchy problem

    Science.gov (United States)

    Burger, Martin; Løseth Elvetun, Ole; Schlottbom, Matthias

    2015-12-01

    Many inverse problems have to deal with complex, evolving and often not exactly known geometries, e.g. as domains of forward problems modeled by partial differential equations. This makes it desirable to use methods which are robust with respect to perturbed or not well resolved domains, and which allow for efficient discretizations not resolving any fine detail of those geometries. For forward problems in partial differential equations methods based on diffuse interface representations have gained strong attention in the last years, but so far they have not been considered systematically for inverse problems. In this work we introduce a diffuse domain method as a tool for the solution of variational inverse problems. As a particular example we study ECG inversion in further detail. ECG inversion is a linear inverse source problem with boundary measurements governed by an anisotropic diffusion equation, which naturally cries for solutions under changing geometries, namely the beating heart. We formulate a regularization strategy using Tikhonov regularization and, using standard source conditions, we prove convergence rates. A special property of our approach is that not only operator perturbations are introduced by the diffuse domain method, but more important we have to deal with topologies which depend on a parameter \\varepsilon in the diffuse domain method, i.e. we have to deal with \\varepsilon -dependent forward operators and \\varepsilon -dependent norms. In particular the appropriate function spaces for the unknown and the data depend on \\varepsilon . This prevents the application of some standard convergence techniques for inverse problems, in particular interpreting the perturbations as data errors in the original problem does not yield suitable results. We consequently develop a novel approach based on saddle-point problems. The numerical solution of the problem is discussed as well and results for several computational experiments are reported. In

  6. A Hybrid Numerical Method for Turbulent Mixing Layers. Degree awarded by Case Western Reserve Univ.

    Science.gov (United States)

    Georgiadis, Nicholas J.

    2001-01-01

    A hybrid method has been developed for simulations of compressible turbulent mixing layers. Such mixing layers dominate the flows in exhaust systems of modern day aircraft and also those of hypersonic vehicles currently under development. The method configurations in which a dominant structural feature provides an unsteady mechanism to drive the turbulent development in the mixing layer. The hybrid method uses a Reynolds-averaged Navier-Stokes (RANS) procedure to calculate wall bounded regions entering a mixing section, and a Large Eddy Simulation (LES) procedure to calculate the mixing dominated regions. A numerical technique was developed to enable the use of the hybrid RANS-LES method on stretched, non-Cartesian grids. Closure for the RANS equations was obtained using the Cebeci-Smith algebraic turbulence model in conjunction with the wall-function approach of Ota and Goldberg. The wall-function approach enabled a continuous computational grid from the RANS regions to the LES region. The LES equations were closed using the Smagorinsky subgrid scale model. The hybrid RANS-LES method is applied to a benchmark compressible mixing layer experiment. Preliminary two dimensional calculations are used to investigate the effects of axial grid density and boundary conditions. Vortex shedding from the base region of a splitter plate separating the upstream flows was observed to eventually transition to turbulence. The location of the transition, however, was much further downstream than indicated by experiments. Actual LES calculations, performed in three spatial directions, also indicated vortex shedding, but the transition to turbulence was found to occur much closer to the beginning of the mixing section. which is in agreement with experimental observations. These calculations demonstrated that LES simulations must be performed in three dimensions. Comparisons of time-averaged axial velocities and turbulence intensities indicated reasonable agreement with experimental

  7. Water supply management using an extended group fuzzy decision-making method: a case study in north-eastern Iran

    Science.gov (United States)

    Minatour, Yasser; Bonakdari, Hossein; Zarghami, Mahdi; Bakhshi, Maryam Ali

    2015-09-01

    The purpose of this study was to develop a group fuzzy multi-criteria decision-making method to be applied in rating problems associated with water resources management. Thus, here Chen's group fuzzy TOPSIS method extended by a difference technique to handle uncertainties of applying a group decision making. Then, the extended group fuzzy TOPSIS method combined with a consistency check. In the presented method, initially linguistic judgments are being surveyed via a consistency checking process, and afterward these judgments are being used in the extended Chen's fuzzy TOPSIS method. Here, each expert's opinion is turned to accurate mathematical numbers and, then, to apply uncertainties, the opinions of group are turned to fuzzy numbers using three mathematical operators. The proposed method is applied to select the optimal strategy for the rural water supply of Nohoor village in north-eastern Iran, as a case study and illustrated example. Sensitivity analyses test over results and comparing results with project reality showed that proposed method offered good results for water resources projects.

  8. Prevalence of Post-Tonsillectomy Bleeding as Day-Case Surgery with Combination Method; Cold Dissection Tonsillectomy and Bipolar Diathermy Hemostasis

    Directory of Open Access Journals (Sweden)

    Abolahassan Faramarzi

    2010-06-01

    Full Text Available Objective:Post-tonsillectomy hemorrhage remains an important factor in determining the safety of performing tonsillectomy as a day case procedure. The aim of this study was to determine the safety of day case tonsillectomy by using combination method, cold dissection tonsillectomy and bipolar diathermy hemostasis. Methods:A prospective randomized clinical study conducted on the patients who had undergone day case tonsillectomy (DCT. There were two groups (DCT and control group each group consisting of 150 cases. Tonsillectomy was performed by using combination method; cold dissection and hemostasis was achieved by ligation of vessels with bipolar electerocautery. Findings:We found 3 cases of post-tonsillectomy bleeding in DCT group and 4 cases in the control group. There was no statistically significant difference in the rate of post-operative hemorrhage between the two groups. Conclusion:The findings suggest the safety of the combination of cold dissection tonsillectomy and bipolar diathermy hemostasis as day case tonsillectomy.

  9. The power of case study method in developing academic skills in teaching Business English (time to play

    Directory of Open Access Journals (Sweden)

    Brattseva E. F.

    2015-01-01

    Full Text Available This article is targeted at analyzing the advantages of using the case study method in the course of Business English at Scientific Research University - Higher School of Economics in Saint Petersburg. Cases offer a lot of opportunities for developing academic skills in reading, writing, listening and making presentations. Students get not only linguistic skills but also non-linguistic competences. Students are taught to work in teams, to analyze the data given in the task, to make decisions. Communicative and managerial skills are obtained as well. Special attention is paid to making team presentations. It is vital to mention that analysis and case solving can be compared to a play where students are actors trying to come up with a solution of a problem using the information given. This approach stimulates students to be more creative, decisive, communicative and goal-oriented. This method helps to achieve better results in developing academic skills while studying Business English. In this article, the importance of Russian companies’ problems analyses is pushed forward.

  10. Evaluation of the effects of rehabilitation after surgery using the Ravitch and Nuss methods: a case study.

    Science.gov (United States)

    Bal-Bocheńska, Monika Anna

    2016-03-01

    Rehabilitation may be helpful in the prevention of complications associated with the treatment of patients with pectus excavatum who are subjected to surgery using the Ravitch and Nuss methods. This paper presents the case of a patient who underwent successful physical rehabilitation after 8 weeks from the surgery using the combined method. As part of the Nuss procedure, two plates were implanted to form a scaffolding for the patient's chest, which had previously been corrected with the Ravitch method. The plates were to be removed after 24 months of treatment. After the procedure, in spite of the favorable cosmetic effect of the repair, there was a significant decrease in the spirometric values and physical fitness of the patient. He underwent an individual physiotherapy program, which lasted four weeks. The streamlining of the respiratory system has significantly improved the spirometric values and raised the overall performance of the patient's organism.

  11. A hybrid Kano-fuzzy AHP method for measuring customer satisfaction: A case study of transportation system

    Directory of Open Access Journals (Sweden)

    Mohammad Hemati

    2011-07-01

    Full Text Available An increase competition on today's economy has created motivation for many organizations to look for different alternatives on better serving the customers. There are always some budget limitations on any customer relationship method, which leads us to prioritize different alternatives. In this paper, we present an empirical method based on an integrated Kano and fuzzy analytical hierarchy procedure to rank suitable alternatives. The proposed model of this paper uses a questionnaire survey to gather customer's opinions and implements the method for a real-world case study of transportation planning. The questionnaire includes 37 questions distributed among 976 passengers for two trips in Iran. The results indicate that driver's physical and mental health, buss equipments with GPS functionality and familiarity of drivers with road and road's conditions play important role on choosing a transportation company.

  12. THE ROLE OF QUALITY METHODS IN IMPROVING EDUCATION PROCESS: CASE STUDY

    Directory of Open Access Journals (Sweden)

    Dragan Pavlović

    2014-10-01

    Full Text Available This paper presents a methodology for applying the Lean Six Sigma method on the educational process. After defining defects that have negative influence on the final quality evaluation of higher education and how these defects can be remedied, the Pareto analysis is done, and that is used for establishing a vital minority of the exams that are critical for examination of faculty. The next step is the Statistical Process Control (SPC analysis that is performed on the exams that are classified as vital minority in Pareto analysis. Ishikawa diagram shows a relation between considered consequence (small number of passed exams and all factors that influence this consequence. Based on the results of implementation of the Lean Six Sigma method in the educational process and implementation of all suggested improvements, the comparative overview of Pareto analysis is given for 2009/2010 and 2012/2013 academic year at the Faculty of Mechanical Engineering, University of Niš.

  13. Taguchi optimization: Case study of gold recovery from amalgamation tailing by using froth flotation method

    Science.gov (United States)

    Sudibyo, Aji, B. B.; Sumardi, S.; Mufakir, F. R.; Junaidi, A.; Nurjaman, F.; Karna, Aziza, Aulia

    2017-01-01

    Gold amalgamation process was widely used to treat gold ore. This process produces the tailing or amalgamation solid waste, which still contains gold at 8-9 ppm. Froth flotation is one of the promising methods to beneficiate gold from this tailing. However, this process requires optimal conditions which depends on the type of raw material. In this study, Taguchi method was used to optimize the optimum conditions of the froth flotation process. The Taguchi optimization shows that the gold recovery was strongly influenced by the particle size which is the best particle size at 150 mesh followed by the Potassium amyl xanthate concentration, pH and pine oil concentration at 1133.98, 4535.92 and 68.04 gr/ton amalgamation tailing, respectively.

  14. Applying Hotspot Detection Methods in Forestry: A Case Study of Chestnut Oak Regeneration

    Directory of Open Access Journals (Sweden)

    Songlin Fei

    2010-01-01

    Full Text Available Hotspot detection has been widely adopted in health sciences for disease surveillance, but rarely in natural resource disciplines. In this paper, two spatial scan statistics (SaTScan and ClusterSeer and a nonspatial classification and regression trees method were evaluated as techniques for identifying chestnut oak (Quercus Montana regeneration hotspots among 50 mixed-oak stands in the central Appalachian region of the eastern United States. Hotspots defined by the three methods had a moderate level of conformity and revealed similar chestnut oak regeneration site affinity. Chestnut oak regeneration hotspots were positively associated with the abundance of chestnut oak trees in the overstory and a moderate cover of heather species (Vaccinium and Gaylussacia spp. but were negatively associated with the abundance of hayscented fern (Dennstaedtia punctilobula and mountain laurel (Kalmia latiforia. In general, hotspot detection is a viable tool for assisting natural resource managers with identifying areas possessing significantly high or low tree regeneration.

  15. An integrated multicriteria decision-making approach to reale state evaluation: case of the todim method

    Directory of Open Access Journals (Sweden)

    Helen M Moshkovich

    2011-04-01

    Full Text Available Evaluation of real estate properties is an important factor in any economy. The appraisal process is rather subjective, based on the appraiser's experience and intuition. Attempts are being made to help appraisers produce more stable and reliable results. In the paper the authors present an integrated approach to the problem based on the multicriteria decision making framework. The process is carried out through three phases using the multicriteria method TODIM. An "adjusted value" iterative procedure for market value estimation is proposed. The final property price ensures that the overall quality of the alternative obtained through the TODIM method is not farther from the comparable properties on the market than the stated threshold. The process is illustrated through an application in the city of Volta Redonda (Brazil. The results are compared with the "proportional approach". The "adjusted value" approach showed significant improvement compared to the "proportional" adjustment of market values

  16. Sustainability Capacity Building Based on Educational Method: A Case Study on China and Sweden Joint Program

    Institute of Scientific and Technical Information of China (English)

    Zhang Qi; Marie Nesser; Jonathon Wigley; Yu Guopei

    2008-01-01

    Environmental Education and Education for Sustainable Development (EE&ESD) have been widely accepted as an effective educational method to contribute to capacity development and processes of change in developing countries. This paper takes SIDA supported EE&ESD in formal educationadvanced international training program, China as an example. By analyzing and reflecting its orientation, implementation, outcomes and evaluation, experiences and lessons learned are expected to help improve the sorts of international cooperation capacity building programs both from international and also Chinese perspectives.

  17. MATHEMATICAL OPTIMIZATION METHODS TO ESTABLISH ACTIVE PHASES ON HETEROGENEOUS CATALYSIS: CASE OF BULK TRANSITION METAL SULPHIDES

    Directory of Open Access Journals (Sweden)

    Iván Machín

    2015-03-01

    Full Text Available This paper presents a set of procedures based on mathematical optimization methods to establish optimal active sulphide phases with higher HDS activity. This paper proposes a list of active phases as a guide for orienting the experimental work in the search of new catalysts that permit optimize the HDS process. Studies in this paper establish Co-S, Cr-S, Nb-S and Ni-S systems have the greatest potential to improve HDS activity.

  18. Quantitative evaluation of sustainable development based on ecological footprint method: a case study of Tianjin

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Since the concept of sustainable development emerged in the late 1980s, more and more countries and regions have been utilizing sustainable development as their developing strategy. But decades have passed without any effective methods available to quantitatively assess sustainable development, Since the ecological footprint evaluation method initiated in 1992, it has become popular in quantitative assessment of sustainable development because of its convenience, easy-understanding, and reliability. As one of the biggest coastal cities in north China and the economic center of the Bohai Coastal Region, Tianjin's gross domestic product (GDP) was 369.762 billion yuan in 2005, accounting for 2.0% of the whole nation's GDP The paper analyzes Tianjin's development with the ecological footprint method, and the results show that Tianjin's ecological footprint and biocapacity in 2005 were 2. 507gha/cap and 0.276gha/cap respectively. The ecological deficit was 2.230gha/cap. And from 1980 to 2005, Tianjin's ecological deficit per 104 yuan GDP decreased; while per capita ecological deficit has been tending to increase rapidly in recent years. All these results demonstrate that Tianjin is in a state of unsustainable development.

  19. Predicting gender differences as latent variables: summed scores, and individual item responses: a methods case study

    Directory of Open Access Journals (Sweden)

    Jacobs Danny O

    2004-10-01

    Full Text Available Abstract Background Modeling latent variables such as physical disability is challenging since its measurement is performed through proxies. This poses significant methodological challenges. The objective of this article is to present three different methods to predict latent variables based on classical summed scores, individual item responses, and latent variable models. Methods This is a review of the literature and data analysis using "layers of information". Data was collected from the North Carolina Back Pain Project, using a modified version of the Roland Questionnaire. Results The three models are compared in relation to their goals and underlying concepts, previous clinical applications, data requirements, statistical theory, and practical applications. Initial linear regression models demonstrated a difference in disability between genders of 1.32 points (95% CI 0.65, 2.00 on a scale from 0–23. Subsequent item analysis found contradictory results across items, with no clear pattern. Finally, IRT models demonstrated three items were demonstrated to present differential item functioning. After these items were removed, the difference between genders was reduced to 0.78 points (95% CI, -0.99, 1.23. These results were shown to be robust with re-sampling methods. Conclusions Purported differences in the levels of a latent variable should be tested using different models to verify whether these differences are real or simply distorted by model assumptions.

  20. The simplest method to measure the geocentric lunar distance: a case of citizen science

    CERN Document Server

    Zuluaga, Jorge I; Ferrin, Ignacio

    2014-01-01

    We present the results of measuring the geocentric lunar distance using what we propose is the simplest method to achieve a precise result. Although lunar distance has been systematically measured to a precision of few millimeters using powerful lasers and retroreflectors installed on the moon by the Apollo missions, the method devised and applied here can be readily used by nonscientist citizens (e.g. amateur astronomers or students) and it requires only a good digital camera. After launching a citizen science project called the Aristarchus Campaign, intended to involve astronomy enthusiasts in scientific measurement of the Lunar Eclipse of 15 April 2014, we compiled and measured a series of pictures obtained by one of us (J.C. Figueroa). These measurements allowed us to estimate the lunar distance to a precision of 3%. We describe here how to perform the measurements and the method to calculate from them the geocentric lunar distance using only the pictures time stamps and a precise measurement of the insta...

  1. A method for risk analysis across governance systems: a Great Barrier Reef case study

    Science.gov (United States)

    Dale, Allan; Vella, Karen; Pressey, Robert L.; Brodie, Jon; Yorkston, Hugh; Potts, Ruth

    2013-03-01

    Healthy governance systems are key to delivering sound environmental management outcomes from global to local scales. There are, however, surprisingly few risk assessment methods that can pinpoint those domains and sub-domains within governance systems that are most likely to influence good environmental outcomes at any particular scale, or those if absent or dysfunctional, most likely to prevent effective environmental management. This paper proposes a new risk assessment method for analysing governance systems. This method is then tested through its preliminary application to a significant real-world context: governance as it relates to the health of Australia’s Great Barrier Reef (GBR). The GBR exists at a supra-regional scale along most of the north eastern coast of Australia. Brodie et al (2012 Mar. Pollut. Bull. 65 81-100) have recently reviewed the state and trend of the health of the GBR, finding that overall trends remain of significant concern. At the same time, official international concern over the governance of the reef has recently been signalled globally by the International Union for the Conservation of Nature (IUCN). These environmental and political contexts make the GBR an ideal candidate for use in testing and reviewing the application of improved tools for governance risk assessment.

  2. An improved method for nonlinear parameter estimation: a case study of the Rössler model

    Science.gov (United States)

    He, Wen-Ping; Wang, Liu; Jiang, Yun-Di; Wan, Shi-Quan

    2016-08-01

    Parameter estimation is an important research topic in nonlinear dynamics. Based on the evolutionary algorithm (EA), Wang et al. (2014) present a new scheme for nonlinear parameter estimation and numerical tests indicate that the estimation precision is satisfactory. However, the convergence rate of the EA is relatively slow when multiple unknown parameters in a multidimensional dynamical system are estimated simultaneously. To solve this problem, an improved method for parameter estimation of nonlinear dynamical equations is provided in the present paper. The main idea of the improved scheme is to use all of the known time series for all of the components in some dynamical equations to estimate the parameters in single component one by one, instead of estimating all of the parameters in all of the components simultaneously. Thus, we can estimate all of the parameters stage by stage. The performance of the improved method was tested using a classic chaotic system—Rössler model. The numerical tests show that the amended parameter estimation scheme can greatly improve the searching efficiency and that there is a significant increase in the convergence rate of the EA, particularly for multiparameter estimation in multidimensional dynamical equations. Moreover, the results indicate that the accuracy of parameter estimation and the CPU time consumed by the presented method have no obvious dependence on the sample size.

  3. A method to assess soil erosion from smallholder farmers' fields: a case study from Malawi.

    Science.gov (United States)

    Mohamoud, Yusuf M

    2013-09-01

    Soil erosion by water is a major threat to sustainable food production systems in Africa. This study presents a qualitative soil erosion assessment method that links the number of broken ridges (NBRS) observed on a smallholder farmer's field after a rain event to factors of soil erosion (e.g., rainfall intensity, slope steepness, crop canopy height, and conservation practice) and to soil loss data measured from a runoff plot and receiving small streams. The assessment method consists of a rapid survey of smallholder farmers combined with field monitoring. Results show an indirect relationship between NBRS and factors of soil erosion. Results also show a direct relationship between NBRS and suspended sediment concentrations measured from an experimental runoff plot and receiving streams that drain the sub-watersheds where farmers' fields are located. Given the limited human and financial resources available to soil erosion research in developing countries, monitoring NBRS is a simple, cost-effective, and reliable erosion assessment method for regions where smallholder farmers practice contour ridging.

  4. ELV Recycling Service Provider Selection Using the Hybrid MCDM Method: A Case Application in China

    Directory of Open Access Journals (Sweden)

    Fuli Zhou

    2016-05-01

    Full Text Available With the rapid depletion of natural resources and undesired environmental changes globally, more interest has been shown in the research of green supply chain practices, including end-of-life vehicle (ELV recycling. The ELV recycling is mandatory for auto-manufacturers by legislation for the purpose of minimizing potential environmental damages. The purpose of the present research is to determine the best choice of ELV recycling service provider by employing an integrating hybrid multi-criteria decision making (MCDM method. In this research, economic, environmental and social factors are taken into consideration. The linguistic variables and trapezoidal fuzzy numbers (TFNs are applied into this evaluation to deal with the vague and qualitative information. With the combined weight calculation of criteria based on fuzzy aggregation and Shannon Entropy techniques, the normative multi-criteria optimization technique (FVIKOR method is applied to explore the best solution. An application was performed based on the proposed hybrid MCDM method, and sensitivity analysis was conducted on different decision making scenarios. The present study provides a decision-making approach on ELV recycling business selection under sustainability and green philosophy with high robustness and easy implementation.

  5. The embalming, the scientific method and the paleopathology: the case of Gaetano Arrighi (1836).

    Science.gov (United States)

    Ciranni, Rosalba; Caramella, Davide; Nenci, Riccardo; Fornaciari, Gino

    2005-01-01

    Since the most ancient times the problem of the artificial preservation of dead bodies has been an important object of study. In ancient and classic times the reasons leading to this practice were essentially of a religious and esoteric type, but in the modern age, following the development of medical and biological studies, embalming has assumed a more practical trend which is both medicine and scientific. The discovery of blood circulation has marked the scientific method which, in its various forms, has circulated all over Europe bringing fame to eminent anatomists such as Federico Ruysch (1638-1731), William (1718-1783) and John Hunter (1728-1793), Jean Nicolas Gannal (1791-1852), Giuseppe Tranchina, Laskowky and Brosch, who affirmed the embalming by endoarterial injection of conservation fluids making evisceration useless and obsolete. The advent of formalin and the introduction of new surgical and autoptic methods have made this practice gradually fall into disuse. For this reason, the mummy found in Leghorn (Tuscany, Central Italy) is of particular importance since was obtained applying the intravascular injection following the method, described by the Italian medical Giuseppe Tranchina in 1835. The mummified body belongs to Gaetano Arrighi, a prisoner in the Leghorn fortress. He was born in Arezzo in 1789 and died on March 1836 at the age of 47 in the Civil Hospital of Leghorn following pleurisy, as results in an annexed document. The day after his death Dr. Raimondo Barsanti from Pisa and Superintendent at the Leghorn hospital made up the Tranchina's method, which consisted in the injection of an arsencial -mercury solution inside of the blood vessels, giving rigidity and dark red color to the dead body. The excellent outcome of the intervention has made it possible, more than 160 years later, to study not only the method by which Arrighi's body was embalmed but also to perform a careful paleopathological imaging study by traditional X-rays and by Computer

  6. Problem Solving Method and Change Management in Universities (Applied case-Jordan

    Directory of Open Access Journals (Sweden)

    Mohammad Alaya

    2012-02-01

    Full Text Available TQ/M is a style of management that has worked for several decades all over world and is receiving growing attention, new some colleges and universities are beginning to recognize that T.Q.M values are more compatible with higher education that many existing control originally coined by Feigenbaum (1983, also used in higher education want the service we provide to be the highest quality. The purpose of this study was to provide an over view of T.Q. M thou (problems solution method. It's feasibility for higher education and academic libraries, and the results of its implementation by colleges and universities. And the change management helps to control the success. Questionnaire was designed to measure the knowledge and perception of academic library directors, dependent heads. Each college has framework which named strategically planning concerned of the problem solving method. In the initial of the educational stage of a process, improvement program, quick results are often obtained because the solutions are obvious or someone has a brilliant idea... However long term, a systematic approach will yield the greatest benefits. In this research scientific method as applied used to constitute the improvement, on fact some control chart can be used effectively utilized is more than one step of the method, while process. Of improvement is the main goal, also in addition to management of changes are mapping to be as way of improve the process and to increase the satisfaction of the performing the process. Therefore the research is divided in to three parts First part care of problem solving method and how to utilize of it in colleges, second take the change management, third part applied among the stuffs of universities (120, who are dealing of education. The data analysis yields the following results: There was a significant differencing found among the respondents concerning their option (member of colleges staffs indicates that there is an evidence

  7. Analysis micro-mechanism of burrs formation in the case of nanometric cutting process using numerical simulation method

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Burrs (exit failure), being one of the important factors influencing the final precision of workpiece, have been widely studied. Today, with the development of manufac- turing technology, the depth of cut falls into the range of nanometer or sub- nanometer, there may be some different disciplines dominating the burrs genera- tion process. Molecular dynamics (MD) method, which is different from continuous mechanics, plays an important role in describing microscopic world. Take the ex- ample of single crystal copper, this paper carries out MD analysis micro-mecha- nism of burrs generation process. The results show that the burrs geometry de- pends on the type of workpiece (ductile or brittle). The depth of cut is decreased in the case of positive burrs generation process while the depth of cut is increased in case of negative burrs generation process.

  8. A unified method for evaluating real-time computer controllers: A case study. [aircraft control

    Science.gov (United States)

    Shin, K. G.; Krishna, C. M.; Lee, Y. H.

    1982-01-01

    A real time control system consists of a synergistic pair, that is, a controlled process and a controller computer. Performance measures for real time controller computers are defined on the basis of the nature of this synergistic pair. A case study of a typical critical controlled process is presented in the context of new performance measures that express the performance of both controlled processes and real time controllers (taken as a unit) on the basis of a single variable: controller response time. Controller response time is a function of current system state, system failure rate, electrical and/or magnetic interference, etc., and is therefore a random variable. Control overhead is expressed as a monotonically nondecreasing function of the response time and the system suffers catastrophic failure, or dynamic failure, if the response time for a control task exceeds the corresponding system hard deadline, if any. A rigorous probabilistic approach is used to estimate the performance measures. The controlled process chosen for study is an aircraft in the final stages of descent, just prior to landing. First, the performance measures for the controller are presented. Secondly, control algorithms for solving the landing problem are discussed and finally the impact of the performance measures on the problem is analyzed.

  9. The Enzyme Portal: a case study in applying user-centred design methods in bioinformatics.

    Science.gov (United States)

    de Matos, Paula; Cham, Jennifer A; Cao, Hong; Alcántara, Rafael; Rowland, Francis; Lopez, Rodrigo; Steinbeck, Christoph

    2013-03-20

    User-centred design (UCD) is a type of user interface design in which the needs and desires of users are taken into account at each stage of the design process for a service or product; often for software applications and websites. Its goal is to facilitate the design of software that is both useful and easy to use. To achieve this, you must characterise users' requirements, design suitable interactions to meet their needs, and test your designs using prototypes and real life scenarios.For bioinformatics, there is little practical information available regarding how to carry out UCD in practice. To address this we describe a complete, multi-stage UCD process used for creating a new bioinformatics resource for integrating enzyme information, called the Enzyme Portal (http://www.ebi.ac.uk/enzymeportal). This freely-available service mines and displays data about proteins with enzymatic activity from public repositories via a single search, and includes biochemical reactions, biological pathways, small molecule chemistry, disease information, 3D protein structures and relevant scientific literature.We employed several UCD techniques, including: persona development, interviews, 'canvas sort' card sorting, user workflows, usability testing and others. Our hope is that this case study will motivate the reader to apply similar UCD approaches to their own software design for bioinformatics. Indeed, we found the benefits included more effective decision-making for design ideas and technologies; enhanced team-working and communication; cost effectiveness; and ultimately a service that more closely meets the needs of our target audience.

  10. Effective Occupation as Method of Territorial Acquisition: Analysis of Sipadan - Ligitan Case

    Directory of Open Access Journals (Sweden)

    Marcel Hendrapati

    2015-08-01

    Full Text Available Various ways, such as cession, prescription, discovery to acquire a title to a part of territory can be conducted by any state, provided this state can exercise effective occupation of the territory. Occupation (or taking of possession which has already been going for a long time, continuous and peaceful followed with recognition is not of physical character merely, but particularly relates to a display of state functions constituting a manifestation of territorial sovereignty, as it can be discovered through many judicial and arbitrarily decisions, like the Sipadan - Ligitan Case. Creation of Malaysia’s title to the two islets is related not only with principle of effective occupation, but also with an existing great difficulty to do avoidance of external influence behind the International Court of Justice (ICJ decision. Any arguments and considerations of the court densely contain alibi or artificial play of tongue aimed at protecting economic interest of certain state in Malaysia in such a way that dissenting opinion and separate opinion emerge of which the resource is any unworthiness or injustice.

  11. Modeling Of Blood Vessel Constriction In 2-D Case Using Molecular Dynamics Method

    CERN Document Server

    Rendi, Mohamad; Viridi, Sparisoma

    2013-01-01

    Blood vessel constriction is simulated with particle-based method using a molecular dynamics authoring software known as Molecular Workbench (WM). Blood flow and vessel wall, the only components considered in constructing a blood vessel, are all represented in particle form with interaction potentials: Lennard-Jones potential, push-pull spring potential, and bending spring potential. Influence of medium or blood plasma is accommodated in plasma viscosity through Stokes drag force. It has been observed that pressure p is increased as constriction c is increased. Leakage of blood vessel starts at 80 % constriction, which shows existence of maximum pressure that can be overcome by vessel wall.

  12. Compression of EMG Signals by Super imposing Methods: Case of WPT and DCT

    Directory of Open Access Journals (Sweden)

    Aimé Joseph Oyobé-Okassa

    2016-04-01

    Full Text Available The objective of this work is to apply on the electromyographic signals (EMG a new compression approach. The originality of this algorithm, that improves the compression ratio of the EMG signals, compared to Modified Algorithm of Decomposition (MAD,is the association of the Discrete Wavelet Packet Transform (DWPT with the Discrete Cosine Transform (DCT. Indeed, the compression algorithms are intended principally to increase the compression ratio while maintaining the reconstructed signalquality. The results obtained by this method are interesting with regard to evaluation criteria of compression.

  13. A variation iteration method for isotropic velocity-dependent potentials: Scattering case

    Energy Technology Data Exchange (ETDEWEB)

    Eed, H. [Applied Science Private University, Basic Science Department, Amman (Jordan)

    2014-12-01

    We propose a new approximation scheme to obtain analytic expressions for the Schroedinger equation with isotropic velocity-dependent potential to determine the scattering phase shift. In order to test the validity of our approach, we applied it to an exactly solvable model for nucleon-nucleon scattering. The results of the variation iteration method (VIM) formalism compare quite well with those of the exactly solvable model. The developed formalism can be applied in problems concerning pion-nucleon, nucleon-nucleon, and electron-atom scattering. (orig.)

  14. TREATMENT OF 30 CASES OF INFANTILE HIGH FEVER WITH ERJIAN-POINT BLOOD-LETTING METHOD

    Institute of Scientific and Technical Information of China (English)

    李赛玲; 朱军

    2001-01-01

    High fever is referred to that the body temperature exceeds 39℃. Due to aplasia of the cerebral nerve system during infantile stage, continuous high fever may induce temporary functional disturbance of the brain, manifesting as sudden and transient loss of consciousness and local or general muscular spasm that is termed as infantile convulsion. The authors find in clinical practice that sometimes, administration of antipyretics as compound aspirin (APC), compound aminopyrine, etc. has no effect on infantile high fever, if treated with Erjian (MA-H 6) bleeding method, the body temperature may be decreased by 0.5~1.0℃. Here is the report.

  15. The Case for Higher Computational Density in the Memory-Bound FDTD Method within Multicore Environments

    Directory of Open Access Journals (Sweden)

    Mohammed F. Hadi

    2012-01-01

    Full Text Available It is argued here that more accurate though more compute-intensive alternate algorithms to certain computational methods which are deemed too inefficient and wasteful when implemented within serial codes can be more efficient and cost-effective when implemented in parallel codes designed to run on today's multicore and many-core environments. This argument is most germane to methods that involve large data sets with relatively limited computational density—in other words, algorithms with small ratios of floating point operations to memory accesses. The examples chosen here to support this argument represent a variety of high-order finite-difference time-domain algorithms. It will be demonstrated that a three- to eightfold increase in floating-point operations due to higher-order finite-differences will translate to only two- to threefold increases in actual run times using either graphical or central processing units of today. It is hoped that this argument will convince researchers to revisit certain numerical techniques that have long been shelved and reevaluate them for multicore usability.

  16. Analyzing the subsurface structure using seismic refraction method: Case study STMKG campus

    Energy Technology Data Exchange (ETDEWEB)

    Wibowo, Bagus Adi, E-mail: bagusadiwibowo1993@gmail.com [The State College of Meteorology, Climatology and Geophysics (STMKG), The Indonesian Meteorology, Climatology, and Geophysics Agency (BMKG), Perhubungan 1 Street, South Tangerang, 15221 (Indonesia); Ngadmanto, Drajat [The Center of Research and Development (PUSLITBANG), The Indonesian Meteorology, Climatology, and Geophysics Agency (BMKG), Angkasa I, Jakarta, 10620 (Indonesia); Daryono [The Mitigation of Earthquake and Tsunami, The Indonesian Meteorology, Climatology, and Geophysics Agency (BMKG), Angkasa I, Jakarta, 10620 (Indonesia)

    2015-04-24

    A geophysic survey is performed to detect subsurface structure under STMKG Campus in Pondok Betung, South Tangerang, Indonesia, using seismic refraction method. The survey used PASI 16S24-U24. The waveform data is acquired from 3 different tracks on the research location with a close range from each track. On each track we expanded 24 geofons with spacing between receiver 2 meters and the total length of each track about 48 meters. The waveform data analysed using 2 different ways. First, used a seismic refractionapplication WINSISIM 12 and second, used a Hagiwara Method. From both analysis, we known the velocity of P-wave in the first and second layer and the thickness of the first layer. From the velocity and the thickness informations we made 2-D vertical subsurface profiles. In this research, we only detect 2 layers in each tracks. The P-wave velocity of first layer is about 200-500 m/s with the thickness of this layer about 3-6 m/s. The P-wave velocity of second layer is about 400-900 m/s. From the P-wave velocity data we interpreted that both layer consisted by similar materials such as top soil, soil, sand, unsaturated gravel, alluvium and clay. But, the P-wave velocity difference between those 2 layers assumed happening because the first layer is soil embankment layer, having younger age than the layer below.

  17. A comparative investigation of methods for longitudinal data with limits of detection through a case study.

    Science.gov (United States)

    Fu, P; Hughes, J; Zeng, G; Hanook, S; Orem, J; Mwanda, O W; Remick, S C

    2016-02-01

    The statistical analysis of continuous longitudinal data may be complicated since quantitative levels of bioassay cannot always be determined. Values beyond the limits of detection (LOD) in the assays may not be observed and thus censored, rendering complexity to the analysis of such data. This article examines how both left-censoring and right censoring of HIV-1 plasma RNA measurements, collected for the study on AIDS-related Non-Hodgkin's lymphoma (AR-NHL) in East Africa, affects the quantification of viral load and explores the natural history of viral load measurements over time in AR-NHL patients receiving anticancer chemotherapy. Data analyses using Monte Carlo EM algorithm (MCEM) are compared to analyses where the LOD or LOD/2 (left censoring) value is substituted for the censored observations, and also to other methods such as multiple imputation, and maximum likelihood estimation for censored data (generalized Tobit regression). Simulations are used to explore the sensitivity of the results to changes in the model parameters. In conclusion, the antiretroviral treatment was associated with a significant decrease in viral load after controlling the effects of other covariates. A simulation study with finite sample size shows MCEM is the least biased method and the estimates are least sensitive to the censoring mechanism.

  18. Comparison between different uncertainty propagation methods in multivariate analysis: An application in the bivariate case

    Energy Technology Data Exchange (ETDEWEB)

    Mullor, R. [Dpto. Estadistica e Investigacion Operativa, Universidad Alicante (Spain); Sanchez, A., E-mail: aisanche@eio.upv.e [Dpto. Estadistica e Investigacion Operativa Aplicadas y Calidad, Universidad Politecnica Valencia, Camino de Vera s/n 46022 (Spain); Martorell, S. [Dpto. Ingenieria Quimica y Nuclear, Universidad Politecnica Valencia (Spain); Martinez-Alzamora, N. [Dpto. Estadistica e Investigacion Operativa Aplicadas y Calidad, Universidad Politecnica Valencia, Camino de Vera s/n 46022 (Spain)

    2011-06-15

    Safety related systems performance optimization is classically based on quantifying the effects that testing and maintenance activities have on reliability and cost (R+C). However, R+C quantification is often incomplete in the sense that important uncertainties may not be considered. An important number of studies have been published in the last decade in the field of R+C based optimization considering uncertainties. They have demonstrated that inclusion of uncertainties in the optimization brings the decision maker insights concerning how uncertain the R+C results are and how this uncertainty does matter as it can result in differences in the outcome of the decision making process. Several methods of uncertainty propagation based on the theory of tolerance regions have been proposed in the literature depending on the particular characteristics of the variables in the output and their relations. In this context, the objective of this paper focuses on the application of non-parametric and parametric methods to analyze uncertainty propagation, which will be implemented on a multi-objective optimization problem where reliability and cost act as decision criteria and maintenance intervals act as decision variables. Finally, a comparison of results of these applications and the conclusions obtained are presented.

  19. The elementary level science methods course: Breeding ground of an apprehension toward science? a case study

    Science.gov (United States)

    Duschl, Richard A.

    Ethnographic research methodologies were used to examine the training of elementary education majors in science in an attempt to gain insight on whether or not their training in science contributes to the apprehension elementary teachers have toward science. The field study consisted of 14 weeks of weekly observations in the elementary education majors science methods class. Interviews with the students and the instructors as well as survey instruments to assess students' preparation in science were used. Two different approaches to the study of science, one content oriented, the other process oriented, may contribute to the students' confusion, insecurity, and avoidance of science. The students' perception that science is learning content, an objective of introductory level science courses, and the science methods class's objectives of teaching science as a process sets up an antagonistic dilemma between the two. Such antagonistic dilemma may be manifest in the lack of instructional time accorded to science by elementary educators. The type of science experiences an individual encounters influences their perceptions. To offset student perceptions developed in science courses which stress principally content, the students need science experiences which truly represent science as inquiry. New strategies for the training of elementary education majors in science need to be examined.

  20. An improved MCDM method for maintenance approach selection: A case study of auto industry

    Directory of Open Access Journals (Sweden)

    Milad Aghaee

    2012-01-01

    Full Text Available In the current competitive environment, managers have been making attempts to convert organizations under their supervision into competitive and responsive through creating capability of timely delivery of quality products and services. In line with this, maintenance as a system plays an important role in achieving these goals. The maintenance strategy selection is a kind of multiple criteria decision-making (MCDM problem, which requires considering a large number of complex factors as multiple evaluation criteria. A robust MCDM method should consider the interactions among criteria. The analytic network process (ANP is a relatively new MCDM method, which can deal with all kinds of interactions systematically. Moreover, the Decision Making Trial and Evaluation Laboratory (DEMATEL not only can convert the relations between cause and effect of criteria into a visual structural model, but also can be used as a way to handle the inner dependences within a set of criteria. Hence, this paper proposes an effective solution based on a combined ANP and DEMATEL approach to help vehicle companies that need to evaluate and select maintenance strategies.

  1. Sales Education beyond the classroom: Building participative learning experiences in Sales Management through the CMGS Method (Case Method with Guest Speakers

    Directory of Open Access Journals (Sweden)

    José Luis Ruizalba Robledo

    2014-09-01

    Full Text Available The overarching goal of working through the CMGSMethod (Case Method with GuestSpeakers in Sales Management courses is toprovide Marketing students with practical knowledge about how a sales managercan deal with a wide variety of possible professional scenarios. Even when thecase method itself is an excellent way to equip students for their prospectiveemployment, the potential of this method can be enhanced with innovativepedagogical tools. Firstly, eight sales managers were invited to the SalesManagement Course as guest speakers. Students were required to prepare forthese sessions, gathering information about the speaker’s sector andidentifying areas of special interest. Each speaker shared their hands-onexperience and offered an overview of their field in a workshop, whileanswering the students’ questions. These sessions increased the interaction ofstudents with sales professionals, who presented their insights into a careerin sales management. The learning experiences built through these workshopswere narrated by the students in the course blog. Secondly, students were askedto present a scientific paper with the aim of bridging the gap between highereducation and cutting-edge research. This article portrays the reasoning behindthe course as well as the different steps followed during the process. Thecourse finished with encouraging results, suggesting the desirability ofincorporating PL (participative learning experiences into any marketingcourse.

  2. Isolating DNA from sexual assault cases: a comparison of standard methods with a nuclease-based approach

    Directory of Open Access Journals (Sweden)

    Garvin Alex M

    2012-12-01

    Full Text Available Abstract Background Profiling sperm DNA present on vaginal swabs taken from rape victims often contributes to identifying and incarcerating rapists. Large amounts of the victim’s epithelial cells contaminate the sperm present on swabs, however, and complicate this process. The standard method for obtaining relatively pure sperm DNA from a vaginal swab is to digest the epithelial cells with Proteinase K in order to solubilize the victim’s DNA, and to then physically separate the soluble DNA from the intact sperm by pelleting the sperm, removing the victim’s fraction, and repeatedly washing the sperm pellet. An alternative approach that does not require washing steps is to digest with Proteinase K, pellet the sperm, remove the victim’s fraction, and then digest the residual victim’s DNA with a nuclease. Methods The nuclease approach has been commercialized in a product, the Erase Sperm Isolation Kit (PTC Labs, Columbia, MO, USA, and five crime laboratories have tested it on semen-spiked female buccal swabs in a direct comparison with their standard methods. Comparisons have also been performed on timed post-coital vaginal swabs and evidence collected from sexual assault cases. Results For the semen-spiked buccal swabs, Erase outperformed the standard methods in all five laboratories and in most cases was able to provide a clean male profile from buccal swabs spiked with only 1,500 sperm. The vaginal swabs taken after consensual sex and the evidence collected from rape victims showed a similar pattern of Erase providing superior profiles. Conclusions In all samples tested, STR profiles of the male DNA fractions obtained with Erase were as good as or better than those obtained using the standard methods.

  3. Complex integrated method of dynamic meditation with Buddhists’ breathing in case of neurotic reactions

    Directory of Open Access Journals (Sweden)

    Omelyanenko V.I.

    2014-02-01

    Full Text Available Purpose: to elaborate complex integrated method of psychological influence upon sport dancers in time of training on base of Buddhists’ meditation “conscious breathing” for neurotic reactions elimination, professional skill improvement and psycho emotional stability advance. Material : twenty dancers at the age of 40-50 with neurotic reactions participated in the research. At the first stage of the research all the subjects’ ability to focus attention at breathing during sports dancing performance was examined. At the second stage training in method of dynamic meditation applied for martial arts of the experimental group of 10 subjects was conducted. Both individual and group training sessions were held. At the third stage the experimental group joined dynamic meditation and breathing at dance performance. At the fourth stage the experimental group’s results were compared with the control group’s results. Results : at the first stage of the research all the subjects noted difficulties in focusing attention on Buddhists’ nasal breathing and dance technique come-down. 3-5 sessions of training in method of dynamic meditation were necessary for the subjects of the experimental group at the second stage of the research. At the third stage of the research all the subjects of the experimental group could control their nasal breathing at dance performance without dance technique come-down. At the fourth stage the comparative evaluation of the results of the experimental and control groups revealed that it was necessary 3-7 sport dance practice sessions for elimination of the neurotic reactions. No such effect was observed in the control group. Conclusions : The results of the research prove that Buddhists’ meditation “conscious breathing” may be joined with dynamic meditation successfully. It’s impossible to focus attention continuously on breathing at time of sport dance performance. The elaborated technique of the integration of

  4. A new method for hardware/software integration of strategic systems Case study for the Space Shuttle

    Science.gov (United States)

    Ionescu, T. V.; Haque, S. I.; Sripad, A. B.

    1981-01-01

    A new method for ground testing a complex avionics system in an integrated manner has been developed. A case study for the Space Shuttle, on which the concept has been successfully implemented, is described here. This approach utilizes the actual hardware and software of the vehicle to perform a realistic simulation of its mission, verifying in the process all the critical interfaces and interactions of the software with the hardware. The advantages over current testing techniques are discussed, as well as the extension of the concept to other strategic systems.

  5. Measurement of productive efficiency with frontier methods. A case study for wind farms

    Energy Technology Data Exchange (ETDEWEB)

    Iglesias, Guillermo; Castellanos, Pablo; Seijas, Amparo [Facultad de Ciencias Economicas y Empresariales, Departamento de Economia Aplicada I, Universidad de A Coruna, Campus de Elvina s/n, 15071 A Coruna (Spain)

    2010-09-15

    In this paper, we measure the productive efficiency of a group of wind farms during the period 2001-2004 using the frontier methods Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA). Taking an extensive definition of the productive process of wind electricity as our starting point, we obtain results which allow us to identify, on the one hand, an essentially ex ante efficiency measure and, on the other hand, aspects of relevance for wind farm development companies (developers), technology suppliers and operators in terms of their economic impact. These results may also be of interest for regulators and other stakeholders in the sector. Furthermore, we discuss the implications of the simultaneous use of DEA and SFA methodologies. (author)

  6. Measurement of productive efficiency with frontier methods: A case study for wind farms

    Energy Technology Data Exchange (ETDEWEB)

    Iglesias, Guillermo, E-mail: gwig@udc.e [Facultad de Ciencias Economicas y Empresariales, Departamento de Economia Aplicada I, Universidad de A Coruna, Campus de Elvina s/n, 15071 A Coruna (Spain); Castellanos, Pablo, E-mail: pcg@udc.e [Facultad de Ciencias Economicas y Empresariales, Departamento de Economia Aplicada I, Universidad de A Coruna, Campus de Elvina s/n, 15071 A Coruna (Spain); Seijas, Amparo, E-mail: asdeai@udc.e [Facultad de Ciencias Economicas y Empresariales, Departamento de Economia Aplicada I, Universidad de A Coruna, Campus de Elvina s/n, 15071 A Coruna (Spain)

    2010-09-15

    In this paper, we measure the productive efficiency of a group of wind farms during the period 2001-2004 using the frontier methods Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA). Taking an extensive definition of the productive process of wind electricity as our starting point, we obtain results which allow us to identify, on the one hand, an essentially ex ante efficiency measure and, on the other hand, aspects of relevance for wind farm development companies (developers), technology suppliers and operators in terms of their economic impact. These results may also be of interest for regulators and other stakeholders in the sector. Furthermore, we discuss the implications of the simultaneous use of DEA and SFA methodologies.

  7. Analysing Repeat Visitation on Country Level with Passive Mobile Positioning Method: an Estonian Case Study

    Directory of Open Access Journals (Sweden)

    Andres Kuusik

    2013-01-01

    Full Text Available The purpose of this paper is to investigate the capabilities and limits of the passive mobile positioning (PMP method in studying loyalty of tourists on the macro level. The repeat visitors were identified using database of call activities of roaming phones in Estonia since 25.04.2005 till 31.01.2009. For this purpose was developed model which selected repeat visits on the basis of time interval. The findings of the study revealed that it is possible to observe the duration, density, seasonality and dynamics of repeat visitations. In addition the local destinations and events most loved by repeat visitors and the trajectory they are using could be also identified. Another important finding revealed that repeat visitors stay longer in destination than first time visitors. The results presented in this paper could be used by Estonian Ministry of Economic Affairs and Communications and by Enterprise Estonia developing the Estonian tourism policy

  8. Using informative priors in facies inversion: The case of C-ISR method

    Science.gov (United States)

    Valakas, G.; Modis, K.

    2016-08-01

    Inverse problems involving the characterization of hydraulic properties of groundwater flow systems by conditioning on observations of the state variables are mathematically ill-posed because they have multiple solutions and are sensitive to small changes in the data. In the framework of McMC methods for nonlinear optimization and under an iterative spatial resampling transition kernel, we present an algorithm for narrowing the prior and thus producing improved proposal realizations. To achieve this goal, we cosimulate the facies distribution conditionally to facies observations and normal scores transformed hydrologic response measurements, assuming a linear coregionalization model. The approach works by creating an importance sampling effect that steers the process to selected areas of the prior. The effectiveness of our approach is demonstrated by an example application on a synthetic underdetermined inverse problem in aquifer characterization.

  9. COMPARABLE VALUATION METHOD A NEW APPROACH. CASE STUDY: A ROMANIAN FLEXOGRAPHIC PRINTING FIRM

    Directory of Open Access Journals (Sweden)

    Kovacs Imola

    2010-12-01

    Full Text Available This study presents the valuation scheme of a flexographic printing industry firm. The industry, the technology used and most importantly the firm being young ones, it is not possible to use the classical comparable valuation methods. The new approach in this matter is to use as benchmark financial ratios not those related to the price of the firm (as P/E, P/S, P/BV, P/CF, P/CAPEX, but those related to the structure of the income statement, financial and operating leverage using 13 Romanian and 6 Hungarian reference firms data. Our main contribution to this line of research is to solve the problem of lack of reference data regarding the price, the benchmark companies not being listed on any stock exchange.

  10. Comprehensive Evaluation Method of Urban Remnant Natural Area:A Case study of Shanghai, China

    Institute of Scientific and Technical Information of China (English)

    CHEN Sheng-quan; WANG Yun; GONG Bin

    2008-01-01

    Urban remnant natural area (URNA), located in the urban or suburb area, less disturbed by dwellers in the process of urbanization, is an important part of complex urban ecosystem and provides significant opportunity for urban sustainable development. Despite that there is a considerable amount of scientific researches on the urban nature in urban and suburb area, the comprehensive research of URNA is still rare. After analyzing the concept and value of URNA, this paper presented a methodology for comprehensive evaluation of URNA by adopting methods of document analysis, prior-selection process, analytic hierarchy process and vector resemblance-degree. As a result, the comprehensive evaluation index of URNA includes target level A, rule level B(ecological environment value, ecological recreation value, social culture value, scientific research value), index level C( diversity, singularity, nature, area, stability, recreation, landscape element, aesthetics, history, scientific), and index level D(20 items). Each index weight of comprehensive evaluation system of URNA of Shanghai was confirmed finally.

  11. Worst-case Analysis of Strategy Iteration and the Simplex Method

    DEFF Research Database (Denmark)

    Hansen, Thomas Dueholm

    In this dissertation we study strategy iteration (also known as policy iteration) algorithms for solving Markov decision processes (MDPs) and two-player turn-based stochastic games (2TBSGs). MDPs provide a mathematical model for sequential decision making under uncertainty. They are widely used...... to model stochastic optimization problems in various areas ranging from operations research, machine learning, artificial intelligence, economics and game theory. The class of two-player turn-based stochastic games is a natural generalization of Markov decision processes that is obtained by introducing...... an adversary. 2TBSGs form an intriguing class of games whose status in many ways resembles that of linear programming 40 years ago. They can be solved efficiently with strategy iteration algorithms, resembling the simplex method for linear programming, but no polynomial time algorithm is known. Linear...

  12. Interrater reliability of the Koppitz Developmental Scoring method in the clinical evaluation of the single case.

    Science.gov (United States)

    Svensson, P W; Hill, M A

    1990-04-01

    Using the Koppitz method, Bender-Gestalt protocols of three patients (8-12 yr.), representing three commonly occurring disorders, and of one normal child were evaluated by 12 raters of varying experience with this system. Raters were asked to make provisional diagnoses based on Bender protocols alone, and these were compared with actual clinical diagnoses. Despite significant interrater reliability of Koppitz Total Developmental Scores and emotional indices, no significant agreement was found in subscores or in diagnoses made, although the effect of raters' experience was noted. Results suggest that the type of dysfunction present is a factor in raters' reliability. Results are seen, however, to support the potential of the Bender-Gestalt for use in relatively subtle diagnosis of children and highlight the differentiation of "organic" versus "developmental" factors as an area for further study.

  13. Using Correlation Adaptometry Method in Assessing Societal Stress: a Ukrainian Case

    CERN Document Server

    Rybnikov, Svyatoslav

    2012-01-01

    Societal stress may cause far reaching political, economic and even geological effects. Nevertheless, it is still scarcely investigated, contrary to social stress, which an individual faces in their interactions within a society. It is natural to suppose that in its adaptation, society demonstrates the same objective laws that biological population does, since they are, in fact, the closest systems. In the survey, the hypothesis is tested that the collective stress effect holds true in society, which must appear (as it happens according to correlation adaptometry method in biological systems) in escalation of both correlations between societal characteristics and their dispersion. Both tends are observed in Ukrainian society during 2009-2012, as a result of political elections that affect societal anxiety.

  14. Pelvic support femoral reconstruction using the method of Ilizarov: a case report.

    Science.gov (United States)

    Samchukov, M L; Birch, J G

    1992-01-01

    A 15-year-old boy presented with a fixed, irreducible congenital dislocation of the hip associated with other multiple lower extremity growth disturbances secondary to neonatal multifocal osteomyelitis. The affected hip had very limited abduction, and the patient had a very severe Trendelenburg gait secondary to the dislocation. The hip was reconstructed according to the Ilizarov method, by a combination of maximum proximal femoral adduction osteotomy in the subtrochanteric region and distal femoral corticotomy, to permit the gradual realignment of the knee into the new weight-bearing axis produced by the proximal osteotomy. Total fixation time for the femoral reconstruction was two months. Five months after removal of the apparatus, the patient was returned to full function with a remarkably improved gait.

  15. Comparing methods of analysing datasets with small clusters: case studies using four paediatric datasets.

    Science.gov (United States)

    Marston, Louise; Peacock, Janet L; Yu, Keming; Brocklehurst, Peter; Calvert, Sandra A; Greenough, Anne; Marlow, Neil

    2009-07-01

    Studies of prematurely born infants contain a relatively large percentage of multiple births, so the resulting data have a hierarchical structure with small clusters of size 1, 2 or 3. Ignoring the clustering may lead to incorrect inferences. The aim of this study was to compare statistical methods which can be used to analyse such data: generalised estimating equations, multilevel models, multiple linear regression and logistic regression. Four datasets which differed in total size and in percentage of multiple births (n = 254, multiple 18%; n = 176, multiple 9%; n = 10 098, multiple 3%; n = 1585, multiple 8%) were analysed. With the continuous outcome, two-level models produced similar results in the larger dataset, while generalised least squares multilevel modelling (ML GLS 'xtreg' in Stata) and maximum likelihood multilevel modelling (ML MLE 'xtmixed' in Stata) produced divergent estimates using the smaller dataset. For the dichotomous outcome, most methods, except generalised least squares multilevel modelling (ML GH 'xtlogit' in Stata) gave similar odds ratios and 95% confidence intervals within datasets. For the continuous outcome, our results suggest using multilevel modelling. We conclude that generalised least squares multilevel modelling (ML GLS 'xtreg' in Stata) and maximum likelihood multilevel modelling (ML MLE 'xtmixed' in Stata) should be used with caution when the dataset is small. Where the outcome is dichotomous and there is a relatively large percentage of non-independent data, it is recommended that these are accounted for in analyses using logistic regression with adjusted standard errors or multilevel modelling. If, however, the dataset has a small percentage of clusters greater than size 1 (e.g. a population dataset of children where there are few multiples) there appears to be less need to adjust for clustering.

  16. Novel free-hand T1 pedicle screw method: Review of 44 consecutive cases

    Directory of Open Access Journals (Sweden)

    Mark A Rivkin

    2014-01-01

    Full Text Available Summary of Background Data: Multilevel posterior cervical instrumented fusions are becoming more prevalent in current practice. Biomechanical characteristics of the cervicothoracic junction may necessitate extending the construct to upper thoracic segments. However, fixation in upper thoracic spine can be technically demanding owing to transitional anatomy while suboptimal placement facilitates vascular and neurologic complications. Thoracic instrumentation methods include free-hand, fluoroscopic guidance, and CT-based image guidance. However, fluoroscopy of upper thoracic spine is challenging secondary to vertebral geometry and patient positioning, while image-guided systems present substantial financial commitment and are not readily available at most centers. Additionally, imaging modalities increase radiation exposure to the patient and surgeon while potentially lengthening surgical time. Materials and Methods: Retrospective review of 44 consecutive patients undergoing a cervicothoracic fusion by a single surgeon using the novel free-hand T1 pedicle screw technique between June 2009 and November 2012. A starting point medial and cephalad to classic entry as well as new trajectory were utilized. No imaging modalities were employed during screw insertion. Postoperative CT scans were obtained on day 1. Screw accuracy was independently evaluated according to the Heary classification. Results: In total, 87 pedicle screws placed were at T1. Grade 1 placement occurred in 72 (82.8% screws, Grade 2 in 4 (4.6% screws and Grade 3 in 9 (10.3% screws. All Grade 2 and 3 breaches were <2 mm except one Grade 3 screw breaching 2-4 mm laterally. Only two screws (2.3% were noted to be Grade 4, both breaching medially by less than 2 mm. No new neurological deficits or returns to operating room took place postoperatively. Conclusions: This modification of the traditional starting point and trajectory at T1 is safe and effective. It attenuates additional bone

  17. Evaluating the Sustainability of Nature Reserves Using an Ecological Footprint Method: A Case Study in China

    Directory of Open Access Journals (Sweden)

    Xiaoman Liu

    2016-12-01

    Full Text Available Nature reserves are established to protect ecosystems and rare flora and fauna. However, with the rapid development of the social economy, many nature reserves are facing enormous pressures from human activities. The assessment of the sustainability of nature reserves is a fundamental task for the planning and management of such areas. In this study, the sustainability of China’s 319 national nature reserves (NRRs was evaluated based on an ecological footprint (EF method. The results indicated that the per capita ecological footprints of all national nature reserves increased 85.86% from 2000 to 2010. Meanwhile, the per capita biocapacity (BC of all national nature reserves increased slightly, with a rate of increase of 1.79%. The ‘traffic light’ method was adopted to identify the sustainability status of those national nature reserves. It was found that currently (2010 45% of NRRs were in the condition of ecological deficit. In terms of dynamic changes in EF and BC, only 16% of NRRs were sustainable. The 124 national nature reserves that were in the red light state were mainly distributed in Anhui Province, Chongqing City, Hunan, Guizhou, Fujian, Shandong Province, and Inner Mongolia. The percentage of nature reserves at the red light state in these areas were 83.3%, 66.7%, 64.7%, 62.5%, 58.3%, 57.1%, and 56.5%, respectively. The reserves in the red light state should be included in the priority concern level and should be strictly controlled in terms of population growth and the intensity of exploitation. The results of this study will provide more effective data for reference and for decision making support in nature reserve protection.

  18. Mapping biomass with remote sensing: a comparison of methods for the case study of Uganda

    Directory of Open Access Journals (Sweden)

    Henry Matieu

    2011-10-01

    Full Text Available Abstract Background Assessing biomass is gaining increasing interest mainly for bioenergy, climate change research and mitigation activities, such as reducing emissions from deforestation and forest degradation and the role of conservation, sustainable management of forests and enhancement of forest carbon stocks in developing countries (REDD+. In response to these needs, a number of biomass/carbon maps have been recently produced using different approaches but the lack of comparable reference data limits their proper validation. The objectives of this study are to compare the available maps for Uganda and to understand the sources of variability in the estimation. Uganda was chosen as a case-study because it presents a reliable national biomass reference dataset. Results The comparison of the biomass/carbon maps show strong disagreement between the products, with estimates of total aboveground biomass of Uganda ranging from 343 to 2201 Tg and different spatial distribution patterns. Compared to the reference map based on country-specific field data and a national Land Cover (LC dataset (estimating 468 Tg, maps based on biome-average biomass values, such as the Intergovernmental Panel on Climate Change (IPCC default values, and global LC datasets tend to strongly overestimate biomass availability of Uganda (ranging from 578 to 2201 Tg, while maps based on satellite data and regression models provide conservative estimates (ranging from 343 to 443 Tg. The comparison of the maps predictions with field data, upscaled to map resolution using LC data, is in accordance with the above findings. This study also demonstrates that the biomass estimates are primarily driven by the biomass reference data while the type of spatial maps used for their stratification has a smaller, but not negligible, impact. The differences in format, resolution and biomass definition used by the maps, as well as the fact that some datasets are not independent from the

  19. The case for increasing returns (2: the methods of planning horizons

    Directory of Open Access Journals (Sweden)

    Frederic B. Jennings Jr.

    2016-05-01

    Full Text Available In neoclassical economics, substitution assumptions support equilibrium models in closed systems shunning interdependence. On these grounds an array of frames show outcomes as stable, efficient, unique and determinate. Heterodox economists say equilibrium models sidestep practical knowledge and the rich reality of economic behavior. Rigor or realism, mainstream or radical, ecological, institutional, socio-cultural: economics invites a wide diversity of assumptions, once short-term models of substitution are opened to question. The answers are blurred by applications; there is clarity in a simplicity shielded from mundane detail. This paper addresses the methodological impact of planning horizons, increasing returns and complementarity, and their proper representation in economic constructions. Horizonal economics can be construed as extending orthodox standards into a realm of time, but for its subtler ramifications. Increasing returns make our relations complementary and not substitutional, loosening the tight deductions from mainstream models of choice. The horizonal extension of our received theory of price applies time to cost and demand curves, showing Marshallian scissors (supply and demand cut outward and downward with expanded horizons. Static conceptions appear in horizonal groups, suggesting complete theories of price should specify agents’ horizons, with no further radical impact: the trouble emerges with increasing returns and complementarity. Horizons stem from unbounded causality; if all we do ripples outward forever in nature and society, the relevant field of inquiry for economics is interdependent: this is the case for bounded rationality as an analytical limit to economic conceptions. In turn, interdependence suggests a use of network constructs to frame complex systemic cascades, and networks open a door to complementarity and increasing returns in transport and information exchange. The gaping maw of increasing returns and

  20. Study on wave energy resource assessing method based on altimeter data—A case study in Northwest Pacific

    Institute of Scientific and Technical Information of China (English)

    WAN Yong; ZHANG Jie; MENG Junmin; WANG Jing; DAI Yongshou

    2016-01-01

    Wave energy resource is a very important ocean renewable energy. A reliable assessment of wave energy resources must be performed before they can be exploited. Compared with wave model, altimeter can provide more accuratein situ observations for ocean wave which can be as a novel method for wave energy assessment. The advantage of altimeter data is to provide accurate significant wave height observations for wave. In order to develop characteristic and advantage of altimeter data and apply altimeter data to wave energy assessment, in this study, we established an assessing method for wave energy in local sea area which is dedicated to altimeter data. This method includes three parts including data selection and processing, establishment of evaluation indexes system and criterion of regional division. Then a case study of Northwest Pacific was performed to discuss specific application for this method. The results show that assessing method in this paper can assess reserves and temporal and spatial distribution effectively and provide scientific references for the siting of wave power plants and the design of wave energy convertors.

  1. Methods for determination and approximation of the domain of attraction in the case of autonomous discrete dynamical systems

    Directory of Open Access Journals (Sweden)

    Grigis A

    2006-01-01

    Full Text Available A method for determination and two methods for approximation of the domain of attraction Da(0 of the asymptotically stable zero steady state of an autonomous, ℝ-analytical, discrete dynamical system are presented. The method of determination is based on the construction of a Lyapunov function V, whose domain of analyticity is Da(0. The first method of approximation uses a sequence of Lyapunov functions Vp, which converge to the Lyapunov function V on Da(0. Each Vp defines an estimate Np of Da(0. For any x ∈ Da(0, there exists an estimate which contains x. The second method of approximation uses a ball B(R ⊂ Da(0 which generates the sequence of estimates Mp = f-p(B(R. For any x ∈ Da(0, there exists an estimate which contains x. The cases ||∂0f||<1 and ρ(∂0f < 1 ≤||∂0f|| are treated separately because significant differences occur.

  2. Towards reafirmation of the case study research method: From „building blocks“ and „process tracing“ to typological theories

    Directory of Open Access Journals (Sweden)

    Milovanović Ivana

    2015-01-01

    Full Text Available This paper represents a contribution to the consideration of the characteristics of the case study research method in sociological researches. In the first part of paper, some specifics of case study method are described, in the second part we represented ways of use of this method in field research. finally, third part of this paper indicates certain „sub methods“ within case study method, such as „building blocks“ and „process tracing“, which are, at the same time, conditions for developing typological theories. Those „sub methods“ indicate evolution of case study method in social sciences during last few decades, as well as importance of existence and use of such „elastic“ method in all, especially field researches where researcher is facing with a series of cognitive concerns. [Projekat Ministarstva nauke Republike Srbije, br. 178028: Duhovna i materijalna kultura Kosova i Metohije

  3. Intensive survey methods in the framework of a regional project: the Serena Region study case

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    Mayoral Herrera, Victorino

    2009-06-01

    Full Text Available The aim of this paper is to show the survey methods developed in the framework of a research project carried out in the Serena region (Badajoz Province, Spain. We start from a critical use of the notion of archaeological site and an assessment of the meaning of intensive surface collection in the context of the study of the structure of preindustrial agrarian landscapes. We offer a detailed exposition of the survey planning, data capture and spatial analysis. In a first stage we make a global estimate of density of surface finds, locating possible areas of interest. In a second phase detected dispersions are qualified by systematic sampling. Its main purpose is to dismiss selective procedures leading to remarkable biases in surface record. We emphasize the balance achieved between data resolution and effort invested. This method has shown its effectiveness to characterize archaeological entities often not considered in Peninsular regional projects. Other factors affecting the recognition of sherd scatters are discussed, like the so-called “background noise”.

    El propósito de este trabajo es mostrar la metodología de prospección de superficie empleada en el marco de un proyecto regional sobre la evolución del paisaje en la comarca de La Serena (Badajoz. Se parte de una utilización crítica del concepto de sitio arqueológico y de una valoración del significado de estrategias intensivas de prospección de superficie en el contexto del estudio de la estructuración de los paisajes agrarios preindustriales. Se exponen los planteamientos, diseño y ejecución de los últimos trabajos efectuados. En una primera etapa se realiza una estimación global de la densidad de ítems y se determinan los posibles puntos de interés. Posteriormente se caracterizan cualitativamente las dispersiones detectadas mediante un muestreo aleatorio estratificado. Se pretende de este modo desterrar procedimientos selectivos y poco sistemáticos en la

  4. Developing a service user facilitated, interactive case study--a reflective and evaluative account of a teaching method.

    Science.gov (United States)

    Ward, Lisa J; Padgett, Kath

    2012-02-01

    This article describes the development and ongoing evaluation of a method of service user facilitated case study in health and social care education in a U.K. University. An action research approach (Norton 2009) has been used in which the aim of the work is to improve personal practice with the aim of enhancing the student experience. The paper is written from the perspective of the service user with support from an academic colleague. The paper describes how a narrative monologue, over time is developed into an interactive case study. In draws upon literature from service user involvement, case study and pedagogic action research. The research group are health and social care students both under and post-graduates. Analysis is via a session evaluation form. Thematic analysis draws out key themes. Firstly that first person accounts have a reasonance and interest with students. Secondly that the built in thinking time helps students to develop their reflection and critical thinking skills. Furthermore a theme emerges on how the technique supports students with their future careers. Finally the author reflects on how the approach enables the development of teaching practice and enhanced student learning.

  5. Analyses of Crime Patterns in NIBRS Data Based on a Novel Graph Theory Clustering Method: Virginia as a Case Study

    Directory of Open Access Journals (Sweden)

    Peixin Zhao

    2014-01-01

    Full Text Available This paper suggests a novel clustering method for analyzing the National Incident-Based Reporting System (NIBRS data, which include the determination of correlation of different crime types, the development of a likelihood index for crimes to occur in a jurisdiction, and the clustering of jurisdictions based on crime type. The method was tested by using the 2005 assault data from 121 jurisdictions in Virginia as a test case. The analyses of these data show that some different crime types are correlated and some different crime parameters are correlated with different crime types. The analyses also show that certain jurisdictions within Virginia share certain crime patterns. This information assists with constructing a pattern for a specific crime type and can be used to determine whether a jurisdiction may be more likely to see this type of crime occur in their area.

  6. On the performance of quantum chemical methods to predict solvatochromic effects. The case of acrolein in aqueous solution

    DEFF Research Database (Denmark)

    Aidas, Kestutis; Møgelhøj, Andreas; Nilsson, Elna Johanna Kristina

    2008-01-01

    The performance of the Hartree–Fock method and the three density functionals B3LYP, PBE0, and CAM-B3LYP is compared to results based on the coupled cluster singles and doubles model in predictions of the solvatochromic effects on the vertical n¿* and ¿* electronic excitation energies of acrolein...... of acrolein in vapor phase and aqueous solution. The gas-to-aqueous solution shift of the n¿* excitation energy is well reproduced by using all density functional methods considered. However, the B3LYP and PBE0 functionals completely fail to describe the ¿* electronic transition in solution, whereas...... the recent CAM-B3LYP functional performs well also in this case. The ¿* excitation energy of acrolein in water solution is found to be very dependent on intermolecular induction and nonelectrostatic interactions. The computed excitation energies of acrolein in vacuum and solution compare well to experimental...

  7. Analyses of crime patterns in NIBRS data based on a novel graph theory clustering method: Virginia as a case study.

    Science.gov (United States)

    Zhao, Peixin; Darrah, Marjorie; Nolan, Jim; Zhang, Cun-Quan

    2014-01-01

    This paper suggests a novel clustering method for analyzing the National Incident-Based Reporting System (NIBRS) data, which include the determination of correlation of different crime types, the development of a likelihood index for crimes to occur in a jurisdiction, and the clustering of jurisdictions based on crime type. The method was tested by using the 2005 assault data from 121 jurisdictions in Virginia as a test case. The analyses of these data show that some different crime types are correlated and some different crime parameters are correlated with different crime types. The analyses also show that certain jurisdictions within Virginia share certain crime patterns. This information assists with constructing a pattern for a specific crime type and can be used to determine whether a jurisdiction may be more likely to see this type of crime occur in their area.

  8. [Rational method for prostaglandin use in cases with postpartal uterine hypotonia].

    Science.gov (United States)

    Bozhinova, S; Porozhanova, V; Atanasova, S; Tsvetkov, M; Popovski, K; Penkov, V

    2001-01-01

    The authors aim is to find out the most common dosages, roads of administration and the effect of 15-Methyl PgF2a (Prostin 15 M) during the treatment of postpartal uterine hypotony 1 to 3 amp. Of Prostin 15 M-1 ml. (250 mg Carboprost) were used deeply muscular, intracervical or intramyometrial, by 51 patients with postpartal hypotony. The most common risk factors associated with the development of postpartal haemorrhage are PIH, prolonged labour, the general anaesthesis and higli multiparity. The adequate treatment with Prostin 15 M woned reduse the life threatening complication in the Labour room. The most efficient is the intracervical way of administration, a good effect could be achieved even with 1 amp. Prostin 15 M when it is applied after the conventional methods and manipulations. The lacu of effect grow Prostin 15 M (in 5.88% in this study) shows that there is another pathology responsible for postpartal hemorrhage and life threatening hemorrhage and this usually requires Laparotomy. We offer every Obstetric Clinic to have 3 amp. Prostin 15 M available and these would spare a lot of negative feelings or emotions and it wont supply a better obstetric outcomes.

  9. Air demand estimation in bottom outlets with the particle finite element method - Susqueda Dam case study

    Science.gov (United States)

    Salazar, Fernando; San-Mauro, Javier; Celigueta, Miguel Ángel; Oñate, Eugenio

    2016-06-01

    Dam bottom outlets play a vital role in dam operation and safety, as they allow controlling the water surface elevation below the spillway level. For partial openings, water flows under the gate lip at high velocity and drags the air downstream of the gate, which may cause damages due to cavitation and vibration. The convenience of installing air vents in dam bottom outlets is well known by practitioners. The design of this element depends basically on the maximum air flow through the air vent, which in turn is a function of the specific geometry and the boundary conditions. The intrinsic features of this phenomenon makes it hard to analyse either on site or in full scaled experimental facilities. As a consequence, empirical formulas are frequently employed, which offer a conservative estimate of the maximum air flow. In this work, the particle finite element method was used to model the air-water interaction in Susqueda Dam bottom outlet, with different gate openings. Specific enhancements of the formulation were developed to consider air-water interaction. The results were analysed as compared to the conventional design criteria and to information gathered on site during the gate operation tests. This analysis suggests that numerical modelling with the PFEM can be helpful for the design of this kind of hydraulic works.

  10. Exploring the Quality Function Deployment method: A case study on the restaurant industry in Taiwan

    Directory of Open Access Journals (Sweden)

    Wang, Wen Sheng

    2013-01-01

    Full Text Available Economic development is always one of the most crucial issues being discussed in the world, which various industries are directly involved such as: agriculture, commerce, and recently the so-called Hi-Technology (Information Technology. With the notion that industry competition could brought about developments, such as improved product, cost cutting, and shortening of the time to market. Companies are continuously looking into what strategies that is beneficial and less risky. In Taiwan, the current economic situations have caused people to exert even more time and effort in earning money. Such phenomenon sparks the high frequency of eating out (or dining out. In addition, the current low birthrate situation in Taiwan, people tends to spend more money on leisure and less time at home. Hence, the restaurant industry has become quite demanding. The current study shall utilize the Quality Function Deployment (QFD method and the matrix House of Quality (HOQ, to evaluate and analyze the trade-off decisions between service quality and customer satisfaction in Taiwan’s restaurant industry. Recommendations and implications are then given to aid future researchers on similar areas of studies.

  11. Spatial analysis of hail and its suppression methods (Case Study: East-Azerbaijan Province, Iran

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    Terifeh Beheshtizadeh

    2014-07-01

    Full Text Available Atmospheric hazards are considered as the mainenvironmental hazards, which threaten plants, animals and human communities. Hailing is one of these hazards which cause a lot of damages to differentactivities, especially agriculture, transportation, economy and so on in theworld. East Azerbaijan is one of the main areas of these activities in Iran. Inthis paper to study the time and place of occurring of hail in East Azerbaijanprovince, the data are collected from 10 synoptic stations in a span of 10year-time (2001-2010. For presenting the diagrams Excel software and forzoning GIS software were used. The results of this study show that the mostproportion of hailing is related to Marand St. with 10 times falling, and theleast one is related to Jolfa St. with only one time falling of hail. Thisissue is clearly observable in zoning map of the province. Time survey forhailing showed that the most rate of hail falling is occurring in April whichis 23 times and the least one is related to September which is only one time.In the circular diagram for seasonal falling it is considered that the mostrate of hailing is in the spring which is 49 times and the least one is in thesummer which is 8 times. In the rest of this study the principles andfundamentals of decreasing hail is discussed and methods of decreasing damagesand hail suppression is studied.

  12. Teachers’ recruitment process via MCDM methods: A case study in Bangladesh

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    C. L. Karmaker

    2015-08-01

    Full Text Available Evaluation of faculty members is very significant for educational organization to prompt reputation of the organization and to provide quality education. Teaching staff, the pillars of the educational institution, can change the whole nation stimulating the magnet of interest, knowledge, and wisdom in the pupils. Selecting a better academic staff among the others is very crucial for Human Resources Management (HRM as the success of any organization solely depends on how well it selects its manpower. Institute managing committee must have a reliable technique to judge a teachers’ ranking through multiple conflicting criteria because different teachers have various capabilities. In Bangladesh, it is a common practice in public engineering universities to select teachers only having good academic records. But teaching staff selection problem is a multi-staged decision-making problem having both quantitative and qualitative criteria. It is evident that it has become challenging as the number of alternatives and conflicting criteria increases. In this paper, a structured framework has been developed using MCDM methods both in fuzzy as well as non-fuzzy environments in the renowned engineering university of Bangladesh, where seven candidates under fifteen different sub-criteria are evaluated and ranked. The study helps the recruitment panel of educational organization in Bangladesh select the most eligible academic staff for required posts.

  13. Post-earthquake relaxation using a spectral element method: 2.5-D case

    Science.gov (United States)

    Pollitz, F. F.

    2014-07-01

    The computation of quasi-static deformation for axisymmetric viscoelastic structures on a gravitating spherical earth is addressed using the spectral element method (SEM). A 2-D spectral element domain is defined with respect to spherical coordinates of radius and angular distance from a pole of symmetry, and 3-D viscoelastic structure is assumed to be azimuthally symmetric with respect to this pole. A point dislocation source that is periodic in azimuth is implemented with a truncated sequence of azimuthal order numbers. Viscoelasticity is limited to linear rheologies and is implemented with the correspondence principle in the Laplace transform domain. This leads to a series of decoupled 2-D problems which are solved with the SEM. Inverse Laplace transform of the independent 2-D solutions leads to the time-domain solution of the 3-D equations of quasi-static equilibrium imposed on a 2-D structure. The numerical procedure is verified through comparison with analytic solutions for finite faults embedded in a laterally homogeneous viscoelastic structure. This methodology is applicable to situations where the predominant structure varies in one horizontal direction, such as a structural contrast across (or parallel to) a long strike-slip fault.

  14. Multicriterial Hierarchy Methods Applied in Consumption Demand Analysis. The Case of Romania

    Directory of Open Access Journals (Sweden)

    Constantin Bob

    2008-03-01

    Full Text Available The basic information for computing the quantitative statistical indicators, that characterize the demand of industrial products and services are collected by the national statistics organizations, through a series of statistical surveys (most of them periodical and partial. The source for data we used in the present paper is an statistical investigation organized by the National Institute of Statistics, "Family budgets survey" that allows to collect information regarding the households composition, income, expenditure, consumption and other aspects of population living standard. In 2005, in Romania, a person spent monthly in average 391,2 RON, meaning about 115,1 Euros for purchasing the consumed food products and beverage, as well as non-foods products, services, investments and other taxes. 23% of this sum was spent for purchasing the consumed food products and beverages, 21.6% of the total sum was spent for purchasing non-food goods and 18,1%  for payment of different services. There is a discrepancy between the different development regions in Romania, regarding total households expenditure composition. For this reason, in the present paper we applied statistical methods for ranking the various development regions in Romania, using the share of householdsí expenditure on categories of products and services as ranking criteria.

  15. Evaluation of two sets of immunohistochemical and Western blot confirmatory methods in the detection of typical and atypical BSE cases

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    Greenlee Justin J

    2011-09-01

    Full Text Available Abstract Background Three distinct forms of bovine spongiform encephalopathy (BSE, defined as classical (C-, low (L- or high (H- type, have been detected through ongoing active and passive surveillance systems for the disease. The aim of the present study was to compare the ability of two sets of immunohistochemical (IHC and Western blot (WB BSE confirmatory protocols to detect C- and atypical (L- and H-type BSE forms. Obex samples from cases of United States and Italian C-type BSE, a U.S. H-type and an Italian L-type BSE case were tested in parallel using the two IHC sets and WB methods. Results The two IHC techniques proved equivalent in identifying and differentiating between C-type, L-type and H-type BSE. The IHC protocols appeared consistent in the identification of PrPSc distribution and deposition patterns in relation to the BSE type examined. Both IHC methods evidenced three distinct PrPSc phenotypes for each type of BSE: prevailing granular and linear tracts pattern in the C-type; intraglial and intraneuronal deposits in the H-type; plaques in the L-type. Also, the two techniques gave comparable results for PrPSc staining intensity on the C- and L-type BSE samples, whereas a higher amount of intraglial and intraneuronal PrPSc deposition on the H-type BSE case was revealed by the method based on a stronger demasking step. Both WB methods were consistent in identifying classical and atypical BSE forms and in differentiating the specific PrPSc molecular weight and glycoform ratios of each form. Conclusions The study showed that the IHC and WB BSE confirmatory methods were equally able to recognize C-, L- and H-type BSE forms and to discriminate between their different immunohistochemical and molecular phenotypes. Of note is that for the first time one of the two sets of BSE confirmatory protocols proved effective in identifying the L-type BSE form. This finding helps to validate the suitability of the BSE confirmatory tests for BSE

  16. Evaluation of the clinical process in a critical care information system using the Lean method: a case study

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    Yusof Maryati Mohd

    2012-12-01

    Full Text Available Abstract Background There are numerous applications for Health Information Systems (HIS that support specific tasks in the clinical workflow. The Lean method has been used increasingly to optimize clinical workflows, by removing waste and shortening the delivery cycle time. There are a limited number of studies on Lean applications related to HIS. Therefore, we applied the Lean method to evaluate the clinical processes related to HIS, in order to evaluate its efficiency in removing waste and optimizing the process flow. This paper presents the evaluation findings of these clinical processes, with regards to a critical care information system (CCIS, known as IntelliVue Clinical Information Portfolio (ICIP, and recommends solutions to the problems that were identified during the study. Methods We conducted a case study under actual clinical settings, to investigate how the Lean method can be used to improve the clinical process. We used observations, interviews, and document analysis, to achieve our stated goal. We also applied two tools from the Lean methodology, namely the Value Stream Mapping and the A3 problem-solving tools. We used eVSM software to plot the Value Stream Map and A3 reports. Results We identified a number of problems related to inefficiency and waste in the clinical process, and proposed an improved process model. Conclusions The case study findings show that the Value Stream Mapping and the A3 reports can be used as tools to identify waste and integrate the process steps more efficiently. We also proposed a standardized and improved clinical process model and suggested an integrated information system that combines database and software applications to reduce waste and data redundancy.

  17. Documenting Elementary Teachers' Sustainability of Instructional Practices: A Mixed Method Case Study

    Science.gov (United States)

    Cotner, Bridget A.

    School reform programs focus on making educational changes; however, research on interventions past the funded implementation phase to determine what was sustained is rarely done (Beery, Senter, Cheadle, Greenwald, Pearson, et al., 2005). This study adds to the research on sustainability by determining what instructional practices, if any, of the Teaching SMARTRTM professional development program that was implemented from 2005--2008 in elementary schools with teachers in grades third through eighth were continued, discontinued, or adapted five years post-implementation (in 2013). Specifically, this study sought to answer the following questions: What do teachers who participated in Teaching SMARTRTM and district administrators share about the sustainability of Teaching SMARTRTM practices in 2013? What teaching strategies do teachers who participated in the program (2005--2008) use in their science classrooms five years postimplementation (2013)? What perceptions about the roles of females in science, technology, engineering, and mathematics (STEM) do teachers who participated in the program (2005--2008) have five years later (2013)? And, What classroom management techniques do the teachers who participated in the program (2005--2008) use five years post implementation (2013)? A mixed method approach was used to answer these questions. Quantitative teacher survey data from 23 teachers who participated in 2008 and 2013 were analyzed in SAS v. 9.3. Descriptive statistics were reported and paired t-tests were conducted to determine mean differences by survey factors identified from an exploratory factor analysis, principal axis factoring, and parallel analysis conducted with teacher survey baseline data (2005). Individual teacher change scores (2008 and 2013) for identified factors were computed using the Reliable Change Index statistic. Qualitative data consisted of interviews with two district administrators and three teachers who responded to the survey in both

  18. SYSTEMATIC RISK ASSESMENT USING OLS METHOD - THE CASE OF THE CAPITAL MARKET OF BOSNIA AND HERZEGOVINA

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    Azra Zaimović

    2012-05-01

    Full Text Available The Sharpe-Lintner Capital Asset Pricing Model (CAPM implies a simple linear equation for pricing risky financial assets, individually and in portfolios. CAPM finds that the relevant risk measure of individual financial assets held as a portion of a well-diversified portfolio is not a variance (or a standard deviation of financial assets, as proposed by the Modern Portfolio Theory, but a contribution of financial assets to the portfolio variance, measured by the financial asset beta. Beta coefficient is the measure of the systematic risk of risky assets.This paper explores beta coefficients of stocks of the Bosnia and Herzegovina capital market. This capital market is new and underdeveloped, with a modest supply of securities and with a small number of marketable securities. It is interesting to explore whether the beta coefficients of domestic stocks are efficient and whether they could be used in portfolio management.The paper employs the OLS method to estimate the standard Sharpe-Linter CAPM model. As in most other new markets, this market has a non-synchronous trading problem, which determined the selection of the sample used in the econometric analysis. A representative sample of stocks with satisfactory marketability is analyzed over a five-year period, i.e. 2005–2009. The basic hypothesis of the research is: beta coefficient as a measure of systematic risk is a relevant risk measure for the capital market of Bosnia and Herzegovina. A special aim of the paper is to explore whether estimated models satisfy the presumptions of the linear regression model, which is being examined using a series of diagnostic tests. The results of this paper can be widely used and have significant implications for business purposes. Special attention is dedicated to estimating efficient beta coefficients that may be considered as reliable in a wide use of the CAPM model in financial practice.

  19. A method for low flow estimation at ungauged sites, case study in Wallonia (Belgium

    Directory of Open Access Journals (Sweden)

    M. Grandry

    2012-10-01

    Full Text Available Being able to estimate low flows at any point of a river is really important nowadays for a good integrated management of rivers. Knowing the magnitude as well as the frequency of such extreme events becomes essential. In order to build a model of low flow calculation, usable in ungauged catchments and which takes also into account low flow frequency, we started with a low flow frequency analysis including a comparison of different distributions. Two-parameter Lognormal and Gamma were the most common distributions that fit low flow data in Wallonia. This was followed by a regionalisation of low flows using 25 different climatic and physical catchment variables, and the development of regression models that can be used to estimate the minimum 7-day average flow for different return periods, using catchment characteristics. The variables the most correlated to specific minimum 7-day average flows were the recession coefficient and percolation, regardless of the return period. The determination coefficients of the models ranged from 0.51 to 0.67 for calibration and from 0.61 to 0.80 for validation. Finally, regression coefficients were logarithmically linked to the return period. This enabled us to develop a single model per region and for the whole study area, in function of the return period. In conclusion, the method developed in this study allows us to estimate low flows in gauged and ungauged catchments of a given region for a given return period. The interest of regionalisation and development of regional models is also discussed.

  20. Rural landscape and cultural routes: a multicriteria spatial classification method tested on an Italian case study

    Directory of Open Access Journals (Sweden)

    Irene Diti

    2015-04-01

    Full Text Available Europe is characterised by a rich net of itineraries that during the Middle Ages were taken by pilgrims head toward the holy places of Christianity. In Italy the main pilgrimage route is the Via Francigena (the road that comes from France, which starts from Canterbury and arrives in Rome, running through Europe for about 1800 km. Municipalities and local associations are focused on purposes and actions aimed at the promotion of those routes, rich in history and spirituality. Also for the European Union the enhancement of those itineraries, nowadays used both by pilgrims and tourists, is crucial, as shown by the various projects aimed at the identification of tools for the development of sustainable cultural tourism. It is important to understand how landscape, that according to the European Landscape Convention reflects the sense of places and represents the image of their history, has evolved along those roads, and to analyse the relationships between the built and natural environments, since they maintain a remarkable symbolic connection between places and peoples over time and history. This study focuses on the Italian section of the Via Francigena that crosses the Emilia-Romagna region, in the province of Piacenza. A land classification method is proposed, with the aim to take into account different indicators: land zoning provided by regional laws, elements of relevant historical and natural value, urban elements, type of agriculture. The analyses are carried out on suitable buffers around the path, thus allowing to create landscape profiles. As nature is a key element for the spirituality character of these pilgrimage routes, the classification process takes into account both protected and other valuable natural elements, besides agricultural activities. The outcomes can be useful to define tools aimed to help pilgrims and tourists to understand the surrounding places along their walk, as well as to lend support to rural and urban planning

  1. The Brain-Resuscitation Acupuncture Method for Treatment of Post Wind-Stroke Mental Depression- A Report of 45 Cases

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    In order to observe the therapeutic effects of the brain-resuscitation acupuncture method for post wind-stroke mental depression, 90 such cases were randomly divided into two groups, each consisting of 45 cases. For the treatment group, the brain-resuscitation acupuncture method was adopted, with Neiguan (PC 6), Renzhong (GV 26), Sanyinjiao (SP 6), Baihui (GV 20), and Shenmen (HT 7) selected as the main points. For the control group, oral medication of Fluoxetine was prescribed. Therapeutic effects and changes in the HAMD integrals of the two groups were observed. The total effective rate in the treatment group was 77.7%, and that in the control group was 75.1%, showing no significant difference between the two groups (P>0.05). The average effect starting time of the treatment group was 11.58±4.89 days, while that of the control group was 15.96±6.50 days, showing a significant difference between the two groups (P<0.05). It can be concluded that for the post wind-stroke mental depression, the brain-resuscitation acupuncturemethod may show a good and quicker therapeutic effect with no side effects as compared with pharmacotherapy.

  2. Combining an expert-based medical entity recognizer to a machine-learning system: methods and a case study.

    Science.gov (United States)

    Zweigenbaum, Pierre; Lavergne, Thomas; Grabar, Natalia; Hamon, Thierry; Rosset, Sophie; Grouin, Cyril

    2013-01-01

    Medical entity recognition is currently generally performed by data-driven methods based on supervised machine learning. Expert-based systems, where linguistic and domain expertise are directly provided to the system are often combined with data-driven systems. We present here a case study where an existing expert-based medical entity recognition system, Ogmios, is combined with a data-driven system, Caramba, based on a linear-chain Conditional Random Field (CRF) classifier. Our case study specifically highlights the risk of overfitting incurred by an expert-based system. We observe that it prevents the combination of the 2 systems from obtaining improvements in precision, recall, or F-measure, and analyze the underlying mechanisms through a post-hoc feature-level analysis. Wrapping the expert-based system alone as attributes input to a CRF classifier does boost its F-measure from 0.603 to 0.710, bringing it on par with the data-driven system. The generalization of this method remains to be further investigated.

  3. THE EFFECTIVENESS OF CASE BASED DISCUSSION AS A VALID PROBLEM BASED LEARNING METHOD IN ANAESTHESIA POSTGRADUATE TEACHING

    Directory of Open Access Journals (Sweden)

    Melveetil S

    2015-11-01

    Full Text Available : CONTEXT: Anaesthesia is a branch of medicine which allows only a very narrow margin of error. Anaesthesia post-graduate (PG teaching with problem-based learning (PBL enhances the critical thinking and problem-solving skills among the students .Among the different problem based learning methods case based discussions (CBD are most widely practiced out of all in anaesthesia PG teaching. METHODS AND MATERIAL: An anonymous questionnaire based, crosssectional survey among 37 anaesthesia residents from two medical institutions in North Kerala, India was conducted. The present survey was designed to assess the effectiveness of case based discussions in anaesthesia PG teaching by assessing the student’s satisfaction with CBD and the suggested modifications if any to improve the current status of teaching. RESULTS AND CONCLUSIONS: The CBD as a part of PBL in anesthesia PG teaching in our set up lacks many important aspects of PBL such as formulation of objectives, facilitation skills, communication on direction of PBL and supplementation of inadequacies. A broader, strict and organized implementation of PBL incorporating the key elements of PBL needs emphasis in PG teaching curriculum. Facilitation skill development programs needs motivation and encouragement from the perspective of the academic administrators.

  4. METHOD CASE-STUDY AS A FACTOR IN DEVELOPMENT OF PROFESSIONAL COMPETENCE OF PRESCHOOL EDUCATIONAL ORGANIZATIONS TEACHERS

    Directory of Open Access Journals (Sweden)

    V. M. Grebennikova

    2016-01-01

    Full Text Available The article is devoted to the actual topic of modern preschool education the organization of effective methodological support beginning teachers in a preschool organization. The article highlights the approaches to the continuing education of young teachers, describes in detail the experience of using the method in this paper a case study. The authors in their studies, the level of professional competence of teachers newly hired young point high enough znanievy component and the availability of skills and personal qualities that are important in teaching. This revealed that the young teachers do not have an adequate level of professional skills and lack of skills. These authors prove  the  necessity and  urgency of  renewal  in  preschool organization of system of improvement of professional competencies of teaching staff. It was found that the method of case study has broad opportunities for the development of professional pedagogical competence. There have been cases possible: practical orientation, the ability to adapt to the real situation of the organizational situation, the activity of participants in a relatively safe situation, to create a friendly working  environment  motivating,  allowing  participants  to use the existing experience, be creative; to receive positive feedback from the host and the participants increase their confidence that they can handle the reality with the objectives of such a plan, or, conversely, to identify their shortcomings; make mistakes in a situation close to the reality, and then analyze them.

  5. Estimating the feeding rate of the bedbug Cimex lectularius in an infested room: an inexpensive method and a case study.

    Science.gov (United States)

    Reinhardt, K; Isaac, D; Naylor, R

    2010-03-01

    The common bedbug, Cimex lectularius L. (Hemiptera: Cimicidae), is a globally re-emerging pest that is playing an increasing role in legal disputes and compensation claims as a result of its unpleasant feeding activity. However, there is little information about the feeding frequency of bedbugs outside controlled laboratory cultures. Here, we present a simple method of estimating the average time since the last bloodmeal of individual female bedbugs in a single sampling event, applicable to a single bedbug harbourage or an entire room. Using the temperature-dependent rate of decrease in the abdomen size of the bedbug after a bloodmeal, we found that, in a highly infested room kept at a constant temperature of 26 degrees C, females fed every 2.5 days on average. Our method corrects for variations in body size across different populations and determines the shrinkage that occurs when individuals are preserved in ethanol. This method should, therefore, be widely applicable. It is cheap, rapid and, if coupled with information on the total number of bedbugs present in a room, allows for the estimation of the minimum number of times persons lodging in a room have been bitten by bedbugs. This method can also be used to calculate the feeding rate of other blood-sucking insects on their hosts. The sex ratio in the infestation was female-biased. Finally, our case study suggests that individual female bedbugs within a harbourage do not seem to feed at a regular rate, but tend to synchronize feeding patterns.

  6. Focused Ethnography as Research Method: A Case Study of Techno Music Producers in Home-Recording Studios

    Directory of Open Access Journals (Sweden)

    Jan Michael Kühn

    2013-05-01

    Full Text Available Translator's Introduction: Jan-Michael Kühn's essay introduces the reader to Hubert Knoblauch's focused ethnography [fokussierte Ethnographie] as an ethnographic fieldwork method. More than a decade after Knoblauch's first publications on this method, there are precious few guides to focused ethnography in the English language, save one (Knoblauch 2005. At any rate, there are certainly no introductions to this methodology that also use EDM scenes as a case study. Kühn's article was originally published in German in Soziologie Magazin, a student-run journal published from Martin Luther University in Halle (Saale but operated by an editorial network that spans Germany. As a result, Kühn orients his writing towards an audience of junior researchers, post-docs and graduate students, highlighting the ways in which focused ethnography suits the circumstances of early research careers, where one may have difficulty securing long-term research stays for fieldwork of broader scope. In particular, he notes that Knoblauch's methods require a very narrow scope for the project (i.e., a "field sector" rather than the whole field, a reliance on the researcher's previous knowledge of the field, and short bursts of intense ethnographic activity in order to create work that is tightly focused but still rigorous and generative of fresh knowledge and new concepts.KEYWORDS: qualitative methods; cultural production; music production; home-recording; technoculture

  7. A new experimental method to prevent paraffin - wax formation on the crude oil wells: A field case study in Libya

    Directory of Open Access Journals (Sweden)

    Elhaddad Elnori E.

    2015-01-01

    Full Text Available Wax formation and deposition is one of the most common problems in oil producing wells. This problem occurs as a result of the reduction of the produced fluid temperature below the wax appearance temperature (range between 46°C and 50°C and the pour point temperature (range between 42°C and 44°C. In this study, two new methods for preventing wax formation were implemented on three oil wells in Libya, where the surface temperature is, normally, 29°C. In the first method, the gas was injected at a pressure of 83.3 bar and a temperature of 65°C (greater than the pour point temperature during the gas-lift operation. In the second method, wax inhibitors (Trichloroethylene-xylene (TEX, Ethylene copolymers, and Comb polymers were injected down the casings together with the gas. Field observations confirmed that by applying these techniques, the production string was kept clean and no wax was formed. The obtained results show that the wax formation could be prevented by both methods.

  8. Comparison of genotypic and phenotypic characterization methods for Pasteurella multocida isolates from fatal cases of bovine respiratory disease.

    Science.gov (United States)

    Taylor, Jared D; Fulton, Robert W; Dabo, S Mady; Lehenbauer, Terry W; Confer, Anthony W

    2010-05-01

    Bovine respiratory disease (BRD) is the most costly disease of beef cattle in North America. Because Pasteurella multocida is a commensal of the upper respiratory tract, it is generally considered an opportunistic pathogen. However, studies in swine indicated that there may be a limited number of strains associated with disease, suggesting that some are more virulent than others. Although this may also be true of isolates from cattle, appropriate typing methods must be established before this possibility can be investigated. The purpose of this study was to compare effectiveness of polymerase chain reaction (PCR) fingerprinting to more traditional approaches for typing bovine P. multocida isolates. Isolates were obtained from 41 cases of fatal BRD and subjected to random amplified polymorphic DNA PCR (RAPD-PCR), whole cell protein (WCP) profiles, outer membrane protein (OMP) profiles, and serotyping. The discrimination index was calculated for each typing method and combinations of each using Simpson's index of diversity. Correlation coefficients were calculated to assess concordance between classification results achieved through genotypic (RAPD-PCR) and phenotypic (WCP, OMP, and serotyping) approaches. All characterization methods were capable of discriminating between isolates. However, there was poor concordance between techniques. There were also few significant associations between typing results and epidemiologic data. Random amplified polymorphic DNA PCR was validated as being a repeatable and reliable means of discriminating between P. multocida isolates obtained from cattle. Isolates obtained from fatal cases of BRD in calves in a commercial feedlot demonstrated significant diversity, justifying additional investigation into whether P. multocida is a strictly opportunistic pathogen in cattle.

  9. The method of atmospheric correction for coastal case 2 water of Beijing-1 micro-satellite with MODIS

    Science.gov (United States)

    Xu, Yong; Zhang, Ying; Zhang, Dong; Liu, Jitang

    2008-12-01

    Accurate atmospheric correction is an important and essential process in ocean color remote sensing because the influence of atmosphere account for the main part of signals received by sensors. Traditional methods usually depend on in-situ measured parameters of atmosphere and could not be applied in operational system. In this paper, MODIS products synchronize with Beijing-1 micro-satellite image were used to extract the parameters of atmosphere. we chose a marine space of clean water far away from the coast in MODIS image and used the products include MOD02, MOD03 and MOD07 to calculate the aerosol radiance of near-infrared bands of MODIS which were used to extrapolate the aerosol radiances of each band of Beijing-1 micro-satellite. Brought the results into radioactive transfer equation and fulfilled atmosphere correction. We found this method can enhanced the detail information of water body, especially to case 2 water. We compared the correction results with original image and the results from 6S model; its effect was consistent well with real conditions and better than 6S model. All these indicated that this method is feasible to atmospheric correction of turbid coastal waters and expands the application of multi-spectral sensors in ocean color remote sensing.

  10. An application of a hybrid MCDM method for the evaluation of entrepreneurial intensity among the SMEs: a case study.

    Science.gov (United States)

    Rostamzadeh, Reza; Ismail, Kamariah; Bodaghi Khajeh Noubar, Hossein

    2014-01-01

    This study presents one of the first attempts to focus on critical success factors influencing the entrepreneurial intensity of Malaysian small and medium sized enterprises (SMEs) as they attempt to expand internationally. The aim of this paper is to evaluate and prioritize the entrepreneurial intensity among the SMEs using multicriteria decision (MCDM) techniques. In this research FAHP is used for finding the weights of criteria and subcriteria. Then for the final ranking of the companies, VIKOR (in Serbian: VlseKriterijumska Optimizacija I Kompromisno Resenje) method was used. Also, as an additional tool, TOPSIS technique, is used to see the differences of two methods applied over the same data. 5 main criteria and 14 subcriteria were developed and implemented in the real-world cases. As the results showed, two ranking methods provided different ranking. Furthermore, the final findings of the research based on VIKOR and TOPSIS indicated that the firms A3 and A4 received the first rank, respectively. In addition, the firm A4 was known as the most entrepreneurial company. This research has been done in the manufacturing sector, but it could be also extended to the service sector for measurement.

  11. method

    Directory of Open Access Journals (Sweden)

    L. M. Kimball

    2002-01-01

    Full Text Available This paper presents an interior point algorithm to solve the multiperiod hydrothermal economic dispatch (HTED. The multiperiod HTED is a large scale nonlinear programming problem. Various optimization methods have been applied to the multiperiod HTED, but most neglect important network characteristics or require decomposition into thermal and hydro subproblems. The algorithm described here exploits the special bordered block diagonal structure and sparsity of the Newton system for the first order necessary conditions to result in a fast efficient algorithm that can account for all network aspects. Applying this new algorithm challenges a conventional method for the use of available hydro resources known as the peak shaving heuristic.

  12. Do método do caso ao case: a trajetória de uma ferramenta pedagógica Case method and case study: an epistemological approach

    Directory of Open Access Journals (Sweden)

    Maria Arlinda de Assis Menezes

    2009-04-01

    Full Text Available O presente trabalho procura distinguir os conceitos acerca do método de estudo de casos e o método do caso dentro das Ciências Sociais e suas aplicabilidades, assim como diferenciar o modo empírico/indutivo e o teórico/dedutivo de pensar, sendo apresentado no trabalho como característicos de americanos e alemães respectivamente, fatores que diferenciam o ensino nos dois países. Para tanto, realiza uma descrição sobre o momento do surgimento do método do caso na escola de Direito em Harvard, destacando a conjuntura social, econômica e cultural que possibilitaram a criação desse instrumento pedagógico e, concomitantemente, apresenta o estudo de caso que, como proposto por Yin, cuja obra referenciou o trabalho em questão, se configura em um dos mais utilizados métodos nos estudos científicos, rompendo com o credo de que é um método fácil de ser aplicado, antes, exige do pesquisador dedicação e rigor científico, além de uma elaboração do problema de maneira a não torná-lo óbvio, um simples relato de experiência. Já o método de casos, criado por Christopher Columbus Langdell, não busca a pesquisa empírica como resposta a um determinado problema, antes, é uma ferramenta pedagógica utilizada na formação de advogados, juristas e administradores de empresas em que a teoria é um subsídio à análise de jurisprudências e experiências em administração, não apenas o objetivo puro e simples da academia.The present work seeks to draw a distinction between the concepts of Case Method and Case Study within the Social Sciences and their applicability, as well as to differentiate the empirical/inductive and theoretical/deductive modes of thinking, which are presented here as respectively characteristic of Americans and Germans, and as factors that distinguish the education in those two countries. To such end, the text describes the moment when the Case Method appeared in the Harvard Law School, emphasizing the social

  13. 战略营销学教学研究中的案例方法%The case method of strategic marketing in teaching and research

    Institute of Scientific and Technical Information of China (English)

    冯海龙

    2012-01-01

    案例方法是多层次商科教学研究中重要的方法。战略营销学的商科学科特点要求其在教学研究中使用案例方法,案例方法的使用受案例方法一般性分析的规制。基于战略营销学的学科发展、内涵界定与学科特点及案例方法的一般性分析.讨论了案例方法在战略营销学教学研究中的应用。%The case method is an important method of rnuhi-level commercial disciplines' teaching and research. Commercial characteristics of strategic marketing required to use the case method in teaching and research, the use of case method is regulated by the general analysis of the case method. Based on the development of strategic marketing, connotation defined and the general analysis of the case method, the author dicuss the application of the case method in the teaching and research on strategic marketing.

  14. Simulation of Sound Waves Using the Lattice Boltzmann Method for Fluid Flow: Benchmark Cases for Outdoor Sound Propagation.

    Directory of Open Access Journals (Sweden)

    Erik M Salomons

    Full Text Available Propagation of sound waves in air can be considered as a special case of fluid dynamics. Consequently, the lattice Boltzmann method (LBM for fluid flow can be used for simulating sound propagation. In this article application of the LBM to sound propagation is illustrated for various cases: free-field propagation, propagation over porous and non-porous ground, propagation over a noise barrier, and propagation in an atmosphere with wind. LBM results are compared with solutions of the equations of acoustics. It is found that the LBM works well for sound waves, but dissipation of sound waves with the LBM is generally much larger than real dissipation of sound waves in air. To circumvent this problem it is proposed here to use the LBM for assessing the excess sound level, i.e. the difference between the sound level and the free-field sound level. The effect of dissipation on the excess sound level is much smaller than the effect on the sound level, so the LBM can be used to estimate the excess sound level for a non-dissipative atmosphere, which is a useful quantity in atmospheric acoustics. To reduce dissipation in an LBM simulation two approaches are considered: i reduction of the kinematic viscosity and ii reduction of the lattice spacing.

  15. A method exploiting syntactic patterns and the UMLS semantics for aligning biomedical ontologies: the case of OBO disease ontologies.

    Science.gov (United States)

    Marquet, Gwenaëlle; Mosser, Jean; Burgun, Anita

    2007-12-01

    The OBO ontologies include more than 50 standard vocabularies that cover different domains, including genomics, chemistry, anatomy and phenotype. Ontology alignment is a means to build consistent biomedical ontologies compatible with standard vocabularies and dedicated to specific domains, such as cancer. An alignment is defined as a set of pairs of concepts, coming from two ontologies, related by a relation R, R not being restricted to the equivalence or subsumption relations. Alignment is performed in three major steps: first, the concepts that are equivalent in the ontologies are identified; second the pairs of concepts that are related although not equivalent are searched for; third the relations between the concepts are characterized. We have developed a method to align ontologies that exploits the compositionality of the terms in OBO ontologies, uses the UMLS to provide synonyms and relations, and defines syntactico-semantic patterns that characterize semantically the relations between concepts. We have applied it to four OBO phenotype ontologies: mouse pathology, human disease, mammalian phenotype, and PATO. We found 386 pairs of equivalent concepts and 20,461 pairs of concepts where one concept name is included in the other term. Among the 20,460 inclusions, we were able to provide a semantic categorization for 2682 relations. In 2552 cases, the relation was present and semantically defined in the UMLS Metathesaurus, in 131 cases the relation was characterized through semantic patterns. Our approach may help to find the semantic relations between concepts in ontologies.

  16. Nonlinear Boltzmann equation for the homogeneous isotropic case: Some improvements to deterministic methods and applications to relaxation towards local equilibrium

    Science.gov (United States)

    Asinari, P.

    2011-03-01

    Boltzmann equation is one the most powerful paradigms for explaining transport phenomena in fluids. Since early fifties, it received a lot of attention due to aerodynamic requirements for high altitude vehicles, vacuum technology requirements and nowadays, micro-electro-mechanical systems (MEMs). Because of the intrinsic mathematical complexity of the problem, Boltzmann himself started his work by considering first the case when the distribution function does not depend on space (homogeneous case), but only on time and the magnitude of the molecular velocity (isotropic collisional integral). The interest with regards to the homogeneous isotropic Boltzmann equation goes beyond simple dilute gases. In the so-called econophysics, a Boltzmann type model is sometimes introduced for studying the distribution of wealth in a simple market. Another recent application of the homogeneous isotropic Boltzmann equation is given by opinion formation modeling in quantitative sociology, also called socio-dynamics or sociophysics. The present work [1] aims to improve the deterministic method for solving homogenous isotropic Boltzmann equation proposed by Aristov [2] by two ideas: (a) the homogeneous isotropic problem is reformulated first in terms of particle kinetic energy (this allows one to ensure exact particle number and energy conservation during microscopic collisions) and (b) a DVM-like correction (where DVM stands for Discrete Velocity Model) is adopted for improving the relaxation rates (this allows one to satisfy exactly the conservation laws at macroscopic level, which is particularly important for describing the late dynamics in the relaxation towards the equilibrium).

  17. Simulation of Sound Waves Using the Lattice Boltzmann Method for Fluid Flow: Benchmark Cases for Outdoor Sound Propagation.

    Science.gov (United States)

    Salomons, Erik M; Lohman, Walter J A; Zhou, Han

    2016-01-01

    Propagation of sound waves in air can be considered as a special case of fluid dynamics. Consequently, the lattice Boltzmann method (LBM) for fluid flow can be used for simulating sound propagation. In this article application of the LBM to sound propagation is illustrated for various cases: free-field propagation, propagation over porous and non-porous ground, propagation over a noise barrier, and propagation in an atmosphere with wind. LBM results are compared with solutions of the equations of acoustics. It is found that the LBM works well for sound waves, but dissipation of sound waves with the LBM is generally much larger than real dissipation of sound waves in air. To circumvent this problem it is proposed here to use the LBM for assessing the excess sound level, i.e. the difference between the sound level and the free-field sound level. The effect of dissipation on the excess sound level is much smaller than the effect on the sound level, so the LBM can be used to estimate the excess sound level for a non-dissipative atmosphere, which is a useful quantity in atmospheric acoustics. To reduce dissipation in an LBM simulation two approaches are considered: i) reduction of the kinematic viscosity and ii) reduction of the lattice spacing.

  18. The planar spectrum in U(N)-invariant quantum mechanics by Fock space methods: I. The bosonic case

    CERN Document Server

    De Pietri, R; Onofri, E

    2007-01-01

    Prompted by recent results on Susy-U(N)-invariant quantum mechanics in the large N limit by Veneziano and Wosiek, we have examined the planar spectrum in the full Hilbert space of U(N)-invariant states built on the Fock vacuum by applying any U(N)-invariant combinations of creation-operators. We present results about 1) the supersymmetric model in the bosonic sector, 2) the standard quartic Hamiltonian. This latter is useful to check our techniques against the exact result of Brezin et al. The SuSy case is where Fock space methods prove to be the most efficient: it turns out that the problem is separable and the exact planar spectrum can be expressed in terms of the single-trace spectrum. In the case of the anharmonic oscillator, on the other hand, the Fock space analysis is quite cumbersome due to the presence of large off-diagonal O(N) terms coupling subspaces with different number of traces; these terms should be absorbed before taking the planar limit and recovering the known planar spectrum. We give anal...

  19. The Methods and Case of Ecological Design%生态设计方法及案例

    Institute of Scientific and Technical Information of China (English)

    曾宇城

    2013-01-01

    Energy crisis, rising oil prices, low rapid economy, food shortages, the promotion of new energy is not widely use-d and so on, these problems faced with rapid population expan-sion has spawned a growing number of ecological-case and pr-omote rational thinking the design methods on ecological buil-ding.%  能源危机、油价上涨、经济低、粮食短缺、新能源尚未大面积推广利用等,这些因人口急速膨胀而面临的问题催生了越来越多的生态案例,促进了对生态建筑设计方法的理性思考。

  20. USING MCSST METHOD FOR MEASURING SEA SURFACE TEMPERATURE WITH MODIS IMAGERY AND MODELING AND PREDICTION OF REGIONAL VARIATIONS WITH LEAST SQUARES METHOD (CASE STUDY: PERSIAN GULF, IRAN

    Directory of Open Access Journals (Sweden)

    M. S. Pakdaman

    2013-10-01

    Full Text Available Nowadays, many researchers in the area of thermal remote sensing applications believe in the necessity of modeling in environmental studies. Modeling in the remotely sensed data and the ability to precisely predict variation of various phenomena, persuaded the experts to use this knowledge increasingly. Suitable model selection is the basis for modeling and is a defining parameter. So, firstly the model should be identified well. The least squares method is for data fitting. In the least squares method, the best fit model is the model that minimizes the sum of squared residuals. In this research, that has been done for modeling variations of the Persian Gulf surface temperature, after data preparation, data gathering has been done with multi-channel method using the MODIS Terra satellites imagery. All the temperature data has been recorded in the period of ten years in winter time from December 2003 to January 2013 with dimensions of 20*20 km and for an area of 400 km2. Subsequently, 12400 temperature samples and variation trend control based on their fluctuation time have been observed. Then 16 mathematical models have been created for model building. After model creation, the variance of all the models has been calculated with ground truth for model testing. But the lowest variance was in combined models from degree 1 to degree 4. The results have shown that outputs for combined models of degree 1 to degree 3 and degree 1 to degree 4 for variables does not show significant differences and implementation of degree 4 does not seem necessary. Employment of trigonometric functions on variables increased the variance in output data. Comparison of the most suitable model and the ground truth showed a variance of just 1⁰. The number of samples, after elimination of blunders reduced to 11600 samples. After this elimination, all the created models have been run on the variables. Also in this case, the highest variance has been obtained for the models

  1. Towards a suite of test cases and a pycomodo library to assess and improve numerical methods in ocean models

    Science.gov (United States)

    Garnier, Valérie; Honnorat, Marc; Benshila, Rachid; Boutet, Martial; Cambon, Gildas; Chanut, Jérome; Couvelard, Xavier; Debreu, Laurent; Ducousso, Nicolas; Duhaut, Thomas; Dumas, Franck; Flavoni, Simona; Gouillon, Flavien; Lathuilière, Cyril; Le Boyer, Arnaud; Le Sommer, Julien; Lyard, Florent; Marsaleix, Patrick; Marchesiello, Patrick; Soufflet, Yves

    2016-04-01

    The COMODO group (http://www.comodo-ocean.fr) gathers developers of global and limited-area ocean models (NEMO, ROMS_AGRIF, S, MARS, HYCOM, S-TUGO) with the aim to address well-identified numerical issues. In order to evaluate existing models, to improve numerical approaches and methods or concept (such as effective resolution) to assess the behavior of numerical model in complex hydrodynamical regimes and to propose guidelines for the development of future ocean models, a benchmark suite that covers both idealized test cases dedicated to targeted properties of numerical schemes and more complex test case allowing the evaluation of the kernel coherence is proposed. The benchmark suite is built to study separately, then together, the main components of an ocean model : the continuity and momentum equations, the advection-diffusion of the tracers, the vertical coordinate design and the time stepping algorithms. The test cases are chosen for their simplicity of implementation (analytic initial conditions), for their capacity to focus on a (few) scheme or part of the kernel, for the availability of analytical solutions or accurate diagnoses and lastly to simulate a key oceanic processus in a controlled environment. Idealized test cases allow to verify properties of numerical schemes advection-diffusion of tracers, - upwelling, - lock exchange, - baroclinic vortex, - adiabatic motion along bathymetry, and to put into light numerical issues that remain undetected in realistic configurations - trajectory of barotropic vortex, - interaction current - topography. When complexity in the simulated dynamics grows up, - internal wave, - unstable baroclinic jet, the sharing of the same experimental designs by different existing models is useful to get a measure of the model sensitivity to numerical choices (Soufflet et al., 2016). Lastly, test cases help in understanding the submesoscale influence on the dynamics (Couvelard et al., 2015). Such a benchmark suite is an interesting

  2. Application of PCA/DEA method to evaluate the performance of human capital management A case study

    Directory of Open Access Journals (Sweden)

    Mohammad Mehdi Tavakoli

    2013-12-01

    Full Text Available During recent years, organizations have been aware of the importance of their assets and have sought to maximize their use. Hence, human capital as one of the assets making a competitive advantage for the company has been highlighted by many organization, and managers who try to surpass their entire rivals. In many cases, managers have regarded human capital as crucial as financial assets and therefore, try to achieve some benefits such as organizational commitment and staffs participations increase through investing in this field. Due to the importance of human capital management, in this paper, performance of Foolad Technic Company was evaluated by human capital management approach and hence, employs PCA/DEA merging method. In this study, first inputs and outputs were determined through DEA model and their values were found by using a questionnaire. Afterward, principle component analysis method helped to remove correlation between input data. Also, data envelopment analysis was used to evaluate the performance of organizational units. At last, unit ranking was done by using TOPSIS.

  3. Utilizing Gravity Methods for Regional Studies in Basin Delineation: Case Study at Jornada del Muerto basin, New Mexico

    Science.gov (United States)

    Villalobos, J. I.

    2005-12-01

    The modeling of basin structures is an important step in the development of plans and policies for ground water management. To facilitate in the analysis of large scale regional structures, gravity data is implemented to examine the overall structural trend of the region. The gravitational attraction of structures in the upper mantle and crust provide vital information about the possible structure and composition of a region. Improved availability of gravity data via internet has promoted extensive construction and interpretation of gravity maps in the analysis of sub-surface structural anomalies. The utilization of gravity data appears to be particularly worthwhile because it is a non-invasive and inexpensive means of addressing the subsurface tectonic framework of large scale regions. In this paper, the author intends to illustrate 1) acquisition of gravity data and its processing; 2) interpretation of gravity data; and 3) sources of uncertainty and errors by using a case study of the Jornada del Muerto basin in South-Central New Mexico where integrated gravity data inferred several faults, sub-basins and thickness variations within the basins structure. The author also explores the integration of gravity method with other geophysical methods to further refine the delineation of basins.

  4. Estimation of intrinsic aquifer vulnerability with index-overlay and statistical methods: the case of eastern Kopaida, central Greece

    KAUST Repository

    Tziritis, E.

    2016-03-01

    The intrinsic vulnerability of a karstic aquifer system in central Greece was jointly assessed with the use of a statistical approach and PI method, as a function of topography, protective cover effectiveness and the degree to which this cover is bypassed due to flow conditions. The input data for the index-overlay PI method were derived from field works and 71 boreholes of the area; the information was obtained, subsequently its critical factors were compiled which included lithology, fissuring and karstification of bedrock, soil characteristics, hydrology, hydrogeology, topography and vegetation. The aforementioned parameters were processed jointly with the aid of a GIS and yielded the final estimation of intrinsic aquifer vulnerability to contamination. Results were compared with an equivalent spatially distributed probability map obtained through a stochastic approach. The calibration and test phase of the latter relied on morphometric conditions derived by terrain analyses of a digital elevation model as well as on geology and land use from thematic maps. This procedure allowed taking into account the topographic influences with respect to a deep system such as the local karstic aquifer of eastern Kopaida basin. Finally, results were validated with ground truth nitrate values obtained from 41 groundwater samples, highlighted the spatial delineation of susceptible areas to contamination in both cases and provided a robust tool for regional planning actions and water resources management schemes.

  5. The method FMEA and its implications in planning a rural micro-enterprise: a case study of Farm Oliveira

    Directory of Open Access Journals (Sweden)

    Caio César de Medeiros Costa

    2011-09-01

    Full Text Available The production of broiler chickens, in despite of the growing market space, it still faces important challenges in production, at basic and industrial level at the same time. In this context, this article summarizes the main conclusions of the application of FMEA in a broiler farm, analyzing also the implications for their planning. This study used descriptive and a case study approach. The results showed that the most frequent problems were characterized, for example as sick chickens and chicken deaths - with the main sources of vaccine shortage and excess in the carrying capacity of the farm. It was observed that the method FMEA was appropriate and contributed for the analyzes, for instance, to the resolution of the structured problems, since, by implementing the method, we could better understand the possible errors and failures that, perhaps, probably can cause these problems, giving the manager security issues and enabling the execution of a plan. So, this research brings the expectative to improve the management of broiler farms and, indirectly, can aid the profitability of poultry farmers, for their awareness of the importance of use quality management tools.

  6. The Von Kármán constant retrieved from CASES-97 dataset using a variational method

    Directory of Open Access Journals (Sweden)

    Y. Zhang

    2008-12-01

    Full Text Available A variational method is developed to retrieve the von Kármán constant κ from the CASES-97 dataset, collected near Wichita, Kansas, the United States from 6 April to 24 May 1997. In the variational method, a cost function is defined to measure the difference between observed and computed gradients of wind speed, air temperature and specific humidity. An optimal estimated von Kármán constant is obtained by minimizing the cost function through adjusting values of the von Kármán constant. Under neutral stratification, the variational analysis confirms the conventional value of κ (=0.40. For non-neutral stratification, however, κ varies with stability. The computational results show that the κ decreases monotonously from stable to unstable stratification. The variational calculated mean value of the von Kármán constant is 0.383~0.390 when the atmospheric stratification is taken into consideration. Relations between κ and surface momentum and heat flux are also examined.

  7. Mineral trioxide aggregate apical plug method for the treatment of nonvital immature permanent maxillary incisors: Three case reports

    Directory of Open Access Journals (Sweden)

    Betül Günes

    2012-01-01

    Full Text Available Treatment of nonvital immature permanent teeth with calcium-hydroxide is associated with some difficulties such as weakened tooth fracture, root canal reinfection and long treatment time. Mineral trioxide aggregate (MTA apical plug method is an alternative treatment option for open apices, and has gained popularity in the recent times. In this case report, we have attempted to present successful treatment of three maxillary incisors with open apices and periapical lesions with MTA. After preparing the access cavity, the working length was determined. The root canals were irrigated with 2.5% Sodium hypochlorite (NaOCl and disinfected with calcium-hydroxide for two weeks. MTA was then placed in the apical 3 millimeters of the root canal. The remaining part of the root canal was filled with gutta-percha and the coronal restoration was finished with composite resin. After six months the radiographic examination showed a decrease of periapical lesions. At a 1-year and 18-months follow up, radiological and clinical successful healing of the incisor teeth was seen. MTA seems as an effective material for the apical plug method for the treatment of nonvital immature permanent teeth with open apices.

  8. Comparison of methods for non-stationary hydrologic frequency analysis: Case study using annual maximum daily precipitation in Taiwan

    Science.gov (United States)

    Chen, Po-Chun; Wang, Yuan-Heng; You, Gene Jiing-Yun; Wei, Chih-Chiang

    2017-02-01

    Future climatic conditions likely will not satisfy stationarity assumption. To address this concern, this study applied three methods to analyze non-stationarity in hydrologic conditions. Based on the principle of identifying distribution and trends (IDT) with time-varying moments, we employed the parametric weighted least squares (WLS) estimation in conjunction with the non-parametric discrete wavelet transform (DWT) and ensemble empirical mode decomposition (EEMD). Our aim was to evaluate the applicability of non-parameter approaches, compared with traditional parameter-based methods. In contrast to most previous studies, which analyzed the non-stationarity of first moments, we incorporated second-moment analysis. Through the estimation of long-term risk, we were able to examine the behavior of return periods under two different definitions: the reciprocal of the exceedance probability of occurrence and the expected recurrence time. The proposed framework represents an improvement over stationary frequency analysis for the design of hydraulic systems. A case study was performed using precipitation data from major climate stations in Taiwan to evaluate the non-stationarity of annual maximum daily precipitation. The results demonstrate the applicability of these three methods in the identification of non-stationarity. For most cases, no significant differences were observed with regard to the trends identified using WLS, DWT, and EEMD. According to the results, a linear model should be able to capture time-variance in either the first or second moment while parabolic trends should be used with caution due to their characteristic rapid increases. It is also observed that local variations in precipitation tend to be overemphasized by DWT and EEMD. The two definitions provided for the concept of return period allows for ambiguous interpretation. With the consideration of non-stationarity, the return period is relatively small under the definition of expected

  9. The order and priority of research and design method application within an assistive technology new product development process: a summative content analysis of 20 case studies.

    Science.gov (United States)

    Torrens, George Edward

    2017-03-12

    Summative content analysis was used to define methods and heuristics from each case study. The review process was in two parts: (1) A literature review to identify conventional research methods and (2) a summative content analysis of published case studies, based on the identified methods and heuristics to suggest an order and priority of where and when were used. Over 200 research and design methods and design heuristics were identified. From the review of the 20 case studies 42 were identified as being applied. The majority of methods and heuristics were applied in phase two, market choice. There appeared a disparity between the limited numbers of methods frequently used, under 10 within the 20 case studies, when hundreds were available. Implications for Rehabilitation The communication highlights a number of issues that have implication for those involved in assistive technology new product development: •The study defined over 200 well-established research and design methods and design heuristics that are available for use by those who specify and design assistive technology products, which provide a comprehensive reference list for practitioners in the field; •The review within the study suggests only a limited number of research and design methods are regularly used by industrial design focused assistive technology new product developers; and, •Debate is required within the practitioners working in this field to reflect on how a wider range of potentially more effective methods and heuristics may be incorporated into daily working practice.

  10. Designing a community engagement framework for a new dengue control method: a case study from central Vietnam.

    Directory of Open Access Journals (Sweden)

    Darlene McNaughton

    2014-05-01

    Full Text Available BACKGROUND: The Wolbachia strategy aims to manipulate mosquito populations to make them incapable of transmitting dengue viruses between people. To test its efficacy, this strategy requires field trials. Public consultation and engagement are recognized as critical to the future success of these programs, but questions remain regarding how to proceed. This paper reports on a case study where social research was used to design a community engagement framework for a new dengue control method, at a potential release site in central Vietnam. METHODOLOGY/PRINCIPAL FINDINGS: The approach described here, draws on an anthropological methodology and uses both qualitative and quantitative methods to design an engagement framework tailored to the concerns, expectations, and socio-political setting of a potential trial release site for Wolbachia-infected Aedes aegypti mosquitoes. The process, research activities, key findings and how these were responded to are described. Safety of the method to humans and the environment was the most common and significant concern, followed by efficacy and impact on local lives. Residents expected to be fully informed and engaged about the science, the project, its safety, the release and who would be responsible should something go wrong. They desired a level of engagement that included regular updates and authorization from government and at least one member of every household at the release site. CONCLUSIONS/SIGNIFICANCE: Results demonstrate that social research can provide important and reliable insights into public concerns and expectations at a potential release site, as well as guidance on how these might be addressed. Findings support the argument that using research to develop more targeted, engagement frameworks can lead to more sensitive, thorough, culturally comprehensible and therefore ethical consultation processes. This approach has now been used successfully to seek public input and eventually support for

  11. Mapping of soil salinity: a comparative study between deterministic and geostatistical methods, case of the Tadla plain (Morocco)

    Science.gov (United States)

    Barbouchi, Meriem; Chokmani, Karem; Ben Aissa, Nadhira; Lhissou, Rachid; El Harti, Abderrazak; Abdelfattah, Riadh

    2013-04-01

    Soil salinization hazard in semi-arid regions such as Central Morocco is increasingly affecting arable lands and this is due to combined effects of anthropogenic activities (development of irrigation) and climate change (Multiplying drought episodes). In a rational strategy of fight against this hazard, salinity mapping is a key step to ensure effective spatiotemporal monitoring. The objective of this study is to test the effectiveness of geostatistical approach in mapping soil salinity compared to more forward deterministic interpolation methods. Three soil salinity sampling campaigns (27 September, 24 October and 19 November 2011) were conducted over the irrigated area of the Tadla plain, situated between the High and Middle Atlasin Central Morocco. Each campaign was made of 38 surface soil samples (upper 5 cm). From each sample the electrical conductivity (EC) was determined in saturated paste extract and used subsequently as proxy of soil salinity. The potential of deterministic interpolation methods (IDW) and geostatistical techniques (Ordinary Kriging) in mapping surface soil salinity was evaluated in a GIS environment through cross-validation technique. Field measurements showed that the soil salinity was generally low except during the second campaign where a significant increase in EC values was recorded. Interpolation results showed a better performance with geostatistical approach compared to deterministic one. Indeed, for all the campaigns, cross-validation yielded lower RMSE and bias for Kriging than IDW. However, the performance of the two methods was dependent on the range and the structure of the spatial variability of salinity. Indeed, Kriging showed better accuracy for the second campaign in comparison with the two others. This could be explained by the wider range of values of soil salinity during this campaign, which has resulted in a greater range of spatial dependence and has a better modeling of the spatial variability of salinity, which 'was

  12. SNPs and real-time quantitative PCR method for constitutional allelic copy number determination, the VPREB1 marker case

    Directory of Open Access Journals (Sweden)

    Costa Elena

    2011-05-01

    Full Text Available Abstract Background 22q11.2 microdeletion is responsible for the DiGeorge Syndrome, characterized by heart defects, psychiatric disorders, endocrine and immune alterations and a 1 in 4000 live birth prevalence. Real-time quantitative PCR (qPCR approaches for allelic copy number determination have recently been investigated in 22q11.2 microdeletions detection. The qPCR method was performed for 22q11.2 microdeletions detection as a first-level screening approach in a genetically unknown series of patients with congenital heart defects. A technical issue related to the VPREB1 qPCR marker was pointed out. Methods A set of 100 unrelated Italian patients with congenital heart defects were tested for 22q11.2 microdeletions by a qPCR method using six different markers. Fluorescence In Situ Hybridization technique (FISH was used for confirmation. Results qPCR identified six patients harbouring the 22q11.2 microdeletion, confirmed by FISH. The VPREB1 gene marker presented with a pattern consistent with hemideletion in one 3 Mb deleted patient, suggestive for a long distal deletion, and in additional five non-deleted patients. The long distal 22q11.2 deletion was not confirmed by Comparative Genomic Hybridization. Indeed, the VPREB1 gene marker generated false positive results in association with the rs1320 G/A SNP, a polymorphism localized within the VPREB1 marker reverse primer sequence. Patients heterozygous for rs1320 SNP, showed a qPCR profile consistent with the presence of a hemideletion. Conclusions Though the qPCR technique showed advantages as a screening approach in terms of cost and time, the VPREB1 marker case revealed that single nucleotide polymorphisms can interfere with qPCR data generating erroneous allelic copy number interpretations.

  13. Yield-enhancing and tuber-downsizing effects of transplantation cultivation method of case-held tuber seedlings in the sweet potato cultivar Beniharuka

    Directory of Open Access Journals (Sweden)

    Katsuki Adachi

    2016-01-01

    Full Text Available We developed transplantation cultivation method of case-held tuber seedlings (CTS, which was derived from direct planting method of seed tubers, and applied this method to the sweet potato cultivar Beniharuka. A plastic case made of polypropylene was designed for cultivation of CTS. Seed tubers of cultivar Beniharuka in the range of 30–80 g were cut in half. The half-cut tubers were placed inside the plastic cases, and the cases were filled with a commercial soil mix. The case-held tubers were incubated under natural sunlight in a glass house. After 3–4 wk, the CTS were transplanted into a field. Mother tuber (seed tuber enlargement was suppressed by the plastic confinement of the cases, and daughter tubers were formed above the case as vine-root-originated tubers. In the field experiments in 2012 and 2013, daughter tuber yields were increased 19% and 21% by case-held tuber seedling transplanting (CTST over conventional vine-planting (VP, the number of daughter tubers per plant in CTST were 36 and 68% higher than in VP, and the mother tuber yields were limited to 2.1 and 4.3% of the total fresh yield of mother and daughter tubers, respectively in 2012 and 2013. Application of CTST method to cultivar Beniharuka enhanced tuber yield, increased the number of daughter tubers per plant, downsized daughter tubers compared to VP, and mother tuber enlargement was suppressed by case-holding. The CTST method is expected to produce more and smaller good in shape tubers of cultivar Beniharuka compared to VP.

  14. Method

    Directory of Open Access Journals (Sweden)

    Xixin Wang

    2012-01-01

    Full Text Available ZrO2 nanotube arrays were prepared by anodization method in aqueous electrolyte containing (NH42SO4 and NH4F. The morphology and structure of nanotube arrays were characterized through scanning electron microscope, X-ray diffraction, and infrared spectra analysis. The zirconia nanotube arrays were used as catalyst in esterification reaction. The effects of calcination temperature and electrolyte concentration on catalytic esterification activity have been investigated in detail. Experiments indicate that nanotube arrays have highest catalytic activity when the concentration of (NH42SO4 is 1 mol/L, the concentration of NH4F is 1 wt%, and the calcination temperature is 400°C. Esterification reaction yield of as much as 97% could be obtained under optimal conditions.

  15. Mixed methods evaluation of targeted case finding for cardiovascular disease prevention using a stepped wedged cluster RCT

    Directory of Open Access Journals (Sweden)

    Marshall Tom

    2012-10-01

    Full Text Available Abstract Background A pilot project cardiovascular prevention was implemented in Sandwell (West Midlands, UK. This used electronic primary care records to identify untreated patients at high risk of cardiovascular disease then invited these high risk patients for assessment by a nurse in their own general practice. Those found to be eligible for treatment were offered treatment. During the pilot a higher proportion of high risk patients were started on treatment in the intervention practices than in control practices. Following the apparent success of the prevention project, it was intended to extend the service to all practices across the Sandwell area. However the pilot project was not a robust evaluation. There was a need for an efficient evaluation that would not disrupt the planned rollout of the project. Methods/design Project nurses will sequentially implement targeted cardiovascular case finding in a phased way across all general practices, with the sequence of general practices determined randomly. This is a stepped wedge randomised controlled trial design. The target population is patients aged 35 to 74, without diabetes or cardiovascular disease whose ten-year cardiovascular risk, (determined from data in their electronic records is ≥20%. The primary outcome is the number of high risk patients started on treatment, because these data could be efficiently obtained from electronic primary care records. From this we can determine the effects of the case finding programme on the proportion of high risk patients started on treatment in practices before and after implementation of targeted case finding. Cost-effectiveness will be modelled from the predicted effects of treatments on cardiovascular events and associated health service costs. Alongside the implementation it is intended to interview clinical staff and patients who participated in the programme in order to determine acceptability to patients and clinicians. Practical

  16. Improving sensitivity of machine learning methods for automated case identification from free-text electronic medical records

    NARCIS (Netherlands)

    Z. Afzal (Zubair); M.J. Schuemie (Martijn); J.C. van Blijderveen (Nico); E.F. Sen (Fatma); M.C.J.M. Sturkenboom (Miriam); J.A. Kors (Jan)

    2013-01-01

    textabstractBackground: Distinguishing cases from non-cases in free-text electronic medical records is an important initial step in observational epidemiological studies, but manual record validation is time-consuming and cumbersome. We compared different approaches to develop an automatic case iden

  17. Method

    Directory of Open Access Journals (Sweden)

    Andrey Gnatov

    2015-01-01

    Full Text Available Recently repair and recovery vehicle body operations become more and more popular. A special place here is taken by equipment that provides performance of given repair operations. The most interesting things are methods for recovery of car body panels that allow the straightening without disassembling of car body panels and damaging of existing protective coating. Now, there are several technologies for repair and recovery of car body panels without their disassembly and dismantling. The most perspective is magnetic-pulse technology of external noncontact straightening. Basics of magnetic-pulse attraction, both ferromagnetic and nonferromagnetic thin-walled sheet metal, are explored. Inductor system calculation models of magnetic-pulse straightening tools are presented. Final analytical expressions for excited efforts calculation in the tools under consideration are introduced. According to the obtained analytical expressions, numerical evaluations of excited forces were executed. The volumetric epures of the attractive force radial distributions for different types of inductors were built. The practical testing of magnetic-pulse straightening with research tools is given. Using the results of the calculations we can create effective tools for an external magnetic-pulse straightening of car body panels.

  18. A finite element perturbation method for computing fluid-induced forces on a centrifugal impeller rotating and whirling in a volute casing

    NARCIS (Netherlands)

    Jonker, J.B.; Essen, van T.G.

    1997-01-01

    A finite element based method has been developed for computing time-averaged fluid-induced radial excitation forces and rotor dynamic forces on a two-dimensional centrifugal impeller rotating and whirling in a volute casing. In this method potential flow theory is used, which implies the assumption

  19. Variable Step Integration Coupled with the Method of Characteristics Solution for Water-Hammer Analysis, A Case Study

    Science.gov (United States)

    Turpin, Jason B.

    2004-01-01

    One-dimensional water-hammer modeling involves the solution of two coupled non-linear hyperbolic partial differential equations (PDEs). These equations result from applying the principles of conservation of mass and momentum to flow through a pipe, and usually the assumption that the speed at which pressure waves propagate through the pipe is constant. In order to solve these equations for the interested quantities (i.e. pressures and flow rates), they must first be converted to a system of ordinary differential equations (ODEs) by either approximating the spatial derivative terms with numerical techniques or using the Method of Characteristics (MOC). The MOC approach is ideal in that no numerical approximation errors are introduced in converting the original system of PDEs into an equivalent system of ODEs. Unfortunately this resulting system of ODEs is bound by a time step constraint so that when integrating the equations the solution can only be obtained at fixed time intervals. If the fluid system to be modeled also contains dynamic components (i.e. components that are best modeled by a system of ODEs), it may be necessary to take extremely small time steps during certain points of the model simulation in order to achieve stability and/or accuracy in the solution. Coupled together, the fixed time step constraint invoked by the MOC, and the occasional need for extremely small time steps in order to obtain stability and/or accuracy, can greatly increase simulation run times. As one solution to this problem, a method for combining variable step integration (VSI) algorithms with the MOC was developed for modeling water-hammer in systems with highly dynamic components. A case study is presented in which reverse flow through a dual-flapper check valve introduces a water-hammer event. The predicted pressure responses upstream of the check-valve are compared with test data.

  20. Optimization of a Coastal Environmental Monitoring Network Based on the Kriging Method: A Case Study of Quanzhou Bay, China

    Directory of Open Access Journals (Sweden)

    Kai Chen

    2016-01-01

    Full Text Available Environmental monitoring is fundamental in assessing environmental quality and to fulfill protection and management measures with permit conditions. However, coastal environmental monitoring work faces many problems and challenges, including the fact that monitoring information cannot be linked up with evaluation, monitoring data cannot well reflect the current coastal environmental condition, and monitoring activities are limited by cost constraints. For these reasons, protection and management measures cannot be developed and implemented well by policy makers who intend to solve this issue. In this paper, Quanzhou Bay in southeastern China was selected as a case study; and the Kriging method and a geographic information system were employed to evaluate and optimize the existing monitoring network in a semienclosed bay. This study used coastal environmental monitoring data from 15 sites (including COD, DIN, and PO4-P to adequately analyze the water quality from 2009 to 2012 by applying the Trophic State Index. The monitoring network in Quanzhou Bay was evaluated and optimized, with the number of sites increased from 15 to 24, and the monitoring precision improved by 32.9%. The results demonstrated that the proposed advanced monitoring network optimization was appropriate for environmental monitoring in Quanzhou Bay. It might provide technical support for coastal management and pollutant reduction in similar areas.

  1. A Generic, Computer-assisted Method for Rapid Vegetation Classification and Survey: Tropical and Temperate Case Studies

    Directory of Open Access Journals (Sweden)

    Andrew N. Gillison

    2002-12-01

    Full Text Available Standard methods of vegetation classification and survey tend to be either too broad for management purposes or too reliant on local species to support inter-regional comparisons. A new approach to this problem uses species-independent plant functional types with a wide spectrum of environmental sensitivity. By means of a rule set, plant functional types can be constructed according to specific combinations from within a generic set of 35 adaptive, morphological plant functional attributes. Each combination assumes that a vascular plant individual can be described as a "coherent" functional unit. When used together with vegetation structure, plant functional types facilitate rapid vegetation assessment that complements species-based data and makes possible uniform comparisons of vegetation response to environmental change within and between countries. Recently developed user-friendly software (VegClass facilitates data entry and the analysis of biophysical field records from a standardized, rapid, survey pro forma. Case studies are presented at a variety of spatial scales and for vegetation types ranging from species-poor arctic tundra to intensive, multitaxa, baseline biodiversity assessments in complex, humid tropical forests. These demonstrate how such data can be rapidly acquired, analyzed, and communicated to conservation managers. Sample databases are linked to downloadable software and a training manual.

  2. Applying a Hybrid QFD-TOPSIS Method to Design Product in the Industry (Case Study in Sum Service Company

    Directory of Open Access Journals (Sweden)

    Babak Haji Karimi

    2012-09-01

    Full Text Available Electronics industry as an industry with high added value and television production industry especially as one of its pillars play an important role in the economy of each country. Therefore, the aim study of this paper is to illustrate how, using a combined QFD-TOPSIS model, organizations are able to their design product in accordance with requirements of consumers with a case study in Sum Service Company. Quality Function Deployment (QFD is one such extremely important quality management tool that is useful in product design and development. Traditionally, QFD rates the Design Requirements (DRs with respect to customer needs and aggregates the rating to get relative importance score of DRs. An increasing number of studies emphasize on the need to incorporate additional factors, such as cost and environmental impact, while calculating the relative importance of DRs. However, there is variety of methodologies for driving the relative importance of DRs, when several additional factors are considered. TOPSIS (technique for order preferences by similarity to ideal solution is suggested for the purpose of the research. This research proposes new approach of TOPSIS for considering the rating of DRs with respect to CRs and several additional factors simultaneously. Proposed method is illustrated using by step-by-step procedure. The proposed fuzzy QFDTOPSIS methodology was applied for the Sum Service Company in Iran.

  3. Reflections on clinical reasoning in mental health occupational therapy: the case of the occupational therapy dynamic method

    Directory of Open Access Journals (Sweden)

    Taís Quevedo Marcolino

    2014-12-01

    Full Text Available The Clinical Reasoning Study supported by the American Occupational Therapy Association/AOTA and the American Occupational Therapy Foundation/AOTF in the United States in the late 1980s, had inaugurated the scientific production in the field and offered an initial framework on clinical reasoning for understanding and conducting clinical cases in Occupational Therapy. Most of the researches in this field have focused on reasoning processes, and point out the need to understand the contents of clinical thoughts, or how occupational therapists act and elaborate hypotheses, based on their background knowledge, in order to produce an explanatory theory. In this direction, this article presents the results of two studies from the author focused on understanding aspects of clinical reasoning of occupational therapists who work sustained by Occupational Therapy Dynamic Method/ MTOD, highlighting similarities and differences on diagnostic and procedural reasoning. The discussion points out need to expand the production of this type of research, in particular with Brazilian professionals, as well as the dissemination and study of this subject in the initial and continuing training of occupational therapists.

  4. A Study on Effective Evaluation Methods for Analyzing Effects of Nature Experiential Study : Through Case Studies on Evaluations of Geological Field Study

    OpenAIRE

    宮下, 治||ミヤシタ, オサム||Miyashita, Osamu

    2008-01-01

    In this paper, I examined evaluation methods through case studies in order to find out effective methods for analyzing effects of nature experiential study on students. I practiced four evaluation methods, which were often used in previous studies for evaluation of nature experiential study; (1) evaluation by contents of report in texts written by students, (2) evaluation by students'learning activities records, (3) evaluation by students' essays after classes, (4) evaluation by results of pr...

  5. Measurement methods and optimization of radiation protection: the case of internal exposure by inhalation to natural uranium compounds; Methodes de mesure et optimisation de la radioprotection: le cas des expositions internes par inhalation aux composes d'uranium naturel

    Energy Technology Data Exchange (ETDEWEB)

    Degrange, J.P. [Centre d' Etudes sur l' Evaluation de la Protection dans le domaine Nucleaire (CEPN), 92 - Fontenay-aux-Roses (France); Gibert, B. [Societe pour la Conversion de l' Uranium en Metal et Hexafluorure (COMURHEX), 11 - Narbonne (France)

    1998-07-01

    The aim of this presentation is to discuss the ability of different measurement methods (air sampling and biological examinations) to answer to demands in the particular case of internal exposure by inhalation to natural uranium compounds. The realism and the sensitivity of each method are studied, on the base of new dosimetric models of the ICRP. The ability of analysis of these methods in order to optimize radiation protection are then discussed. (N.C.)

  6. 论高校审计学课程案例教学法的改进%Improvement in Case Teaching Method of Auditing Course

    Institute of Scientific and Technical Information of China (English)

    庄莹

    2012-01-01

    Stating the case teaching and its important role of auditing course, aiming at several problems of this teaching method, this paper provides several suggestions which include constructing high quality case database, renewing audit cases and other diversified measures to ensure successful implementation of audit case teaching method.%阐述审计学课程的案例教学法及其重要地位和作用,针对当前采用这一教学法所存在的诸多问题,提出了建立高质量的审计案例库,注重审计案例素材的不断更新,以及多种渠道保证审计案例教学的成功实施等系列改进建议。

  7. Developing a new case based computer-aided detection scheme and an adaptive cueing method to improve performance in detecting mammographic lesions

    Science.gov (United States)

    Tan, Maxine; Aghaei, Faranak; Wang, Yunzhi; Zheng, Bin

    2017-01-01

    The purpose of this study is to evaluate a new method to improve performance of computer-aided detection (CAD) schemes of screening mammograms with two approaches. In the first approach, we developed a new case based CAD scheme using a set of optimally selected global mammographic density, texture, spiculation, and structural similarity features computed from all four full-field digital mammography images of the craniocaudal (CC) and mediolateral oblique (MLO) views by using a modified fast and accurate sequential floating forward selection feature selection algorithm. Selected features were then applied to a ‘scoring fusion’ artificial neural network classification scheme to produce a final case based risk score. In the second approach, we combined the case based risk score with the conventional lesion based scores of a conventional lesion based CAD scheme using a new adaptive cueing method that is integrated with the case based risk scores. We evaluated our methods using a ten-fold cross-validation scheme on 924 cases (476 cancer and 448 recalled or negative), whereby each case had all four images from the CC and MLO views. The area under the receiver operating characteristic curve was AUC  =  0.793  ±  0.015 and the odds ratio monotonically increased from 1 to 37.21 as CAD-generated case based detection scores increased. Using the new adaptive cueing method, the region based and case based sensitivities of the conventional CAD scheme at a false positive rate of 0.71 per image increased by 2.4% and 0.8%, respectively. The study demonstrated that supplementary information can be derived by computing global mammographic density image features to improve CAD-cueing performance on the suspicious mammographic lesions.

  8. Evaluating statistical and clinical significance of intervention effects in single-case experimental designs: an SPSS method to analyze univariate data.

    Science.gov (United States)

    Maric, Marija; de Haan, Else; Hogendoorn, Sanne M; Wolters, Lidewij H; Huizenga, Hilde M

    2015-03-01

    Single-case experimental designs are useful methods in clinical research practice to investigate individual client progress. Their proliferation might have been hampered by methodological challenges such as the difficulty applying existing statistical procedures. In this article, we describe a data-analytic method to analyze univariate (i.e., one symptom) single-case data using the common package SPSS. This method can help the clinical researcher to investigate whether an intervention works as compared with a baseline period or another intervention type, and to determine whether symptom improvement is clinically significant. First, we describe the statistical method in a conceptual way and show how it can be implemented in SPSS. Simulation studies were performed to determine the number of observation points required per intervention phase. Second, to illustrate this method and its implications, we present a case study of an adolescent with anxiety disorders treated with cognitive-behavioral therapy techniques in an outpatient psychotherapy clinic, whose symptoms were regularly assessed before each session. We provide a description of the data analyses and results of this case study. Finally, we discuss the advantages and shortcomings of the proposed method.

  9. Screening of pollution control and clean-up materials for river chemical spills using the multiple case-based reasoning method with a difference-driven revision strategy.

    Science.gov (United States)

    Liu, Rentao; Jiang, Jiping; Guo, Liang; Shi, Bin; Liu, Jie; Du, Zhaolin; Wang, Peng

    2016-06-01

    In-depth filtering of emergency disposal technology (EDT) and materials has been required in the process of environmental pollution emergency disposal. However, an urgent problem that must be solved is how to quickly and accurately select the most appropriate materials for treating a pollution event from the existing spill control and clean-up materials (SCCM). To meet this need, the following objectives were addressed in this study. First, the material base and a case base for environment pollution emergency disposal were established to build a foundation and provide material for SCCM screening. Second, the multiple case-based reasoning model method with a difference-driven revision strategy (DDRS-MCBR) was applied to improve the original dual case-based reasoning model method system, and screening and decision-making was performed for SCCM using this model. Third, an actual environmental pollution accident from 2012 was used as a case study to verify the material base, case base, and screening model. The results demonstrated that the DDRS-MCBR method was fast, efficient, and practical. The DDRS-MCBR method changes the passive situation in which the choice of SCCM screening depends only on the subjective experience of the decision maker and offers a new approach to screening SCCM.

  10. Efficiency of two-phase methods with focus on a planned population-based case-control study on air pollution and stroke

    Directory of Open Access Journals (Sweden)

    Strömberg Ulf

    2007-11-01

    Full Text Available Abstract Background We plan to conduct a case-control study to investigate whether exposure to nitrogen dioxide (NO2 increases the risk of stroke. In case-control studies, selective participation can lead to bias and loss of efficiency. A two-phase design can reduce bias and improve efficiency by combining information on the non-participating subjects with information from the participating subjects. In our planned study, we will have access to individual disease status and data on NO2 exposure on group (area level for a large population sample of Scania, southern Sweden. A smaller sub-sample will be selected to the second phase for individual-level assessment on exposure and covariables. In this paper, we simulate a case-control study based on our planned study. We develop a two-phase method for this study and compare the performance of our method with the performance of other two-phase methods. Methods A two-phase case-control study was simulated with a varying number of first- and second-phase subjects. Estimation methods: Method 1: Effect estimation with second-phase data only. Method 2: Effect estimation by adjusting the first-phase estimate with the difference between the adjusted and unadjusted second-phase estimate. The first-phase estimate is based on individual disease status and residential address for all study subjects that are linked to register data on NO2-exposure for each geographical area. Method 3: Effect estimation by using the expectation-maximization (EM algorithm without taking area-level register data on exposure into account. Method 4: Effect estimation by using the EM algorithm and incorporating group-level register data on NO2-exposure. Results The simulated scenarios were such that, unbiased or marginally biased ( Conclusion In the setting described here, method 4 had the best performance in order to improve efficiency, while adjusting for varying participation rates across areas.

  11. Fifty Cases of Child Restless Syndrome Treated with the Integrated Method of Chinese Herbal Drugs and Auricular-Plaster Therapy

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ Fifty cases of child restless syndrome were treated with oral administration of Chinese traditional herbal drugs plus auricular-plaster therapy from December 1998 to November 2001, and another 47 cases were treated with oral administration of methylphenidate as controls. The result is reported as follows.

  12. Multi-method characterisation of an active landslide: Case study in the Pays d'Auge plateau (Normandy, France)

    Science.gov (United States)

    Fressard, M.; Maquaire, O.; Thiery, Y.; Davidson, R.; Lissak, C.

    2016-10-01

    Shallow landslides are among the most frequent natural hazards in the Pays d'Auge plateau (Normandy, France) but no study has yet focused on the functioning of these phenomena at a detailed scale. This study aims to identify the structure and mechanical properties of a representative case study in the region. The main objective is to understand landslide dynamics and behaviour in order to assess triggering conditions and quantify triggering thresholds. The results will help complement the regional landslide hazard mapping based on landslide statistical susceptibility mapping and quantification of triggering thresholds. The landslide morphology and internal structure were identified using a multi-method approach. A morphodynamic map was produced in the field using cartographic GPS to depict the surface morphology and map the estimated landslide activity. These field measurements were completed by an analysis of all available aerial-photo images from the French National Geographic Institute (IGN) to identify the occurrence dates and possible landslide reactivations. The landslide structure was defined using multiple electrical tomography profiles, boreholes, augerings and penetration tests. Despite the overall low electrical resistivity of the landslide materials (i.e. ± < 80 Ω·m), the electrical profiles showed good agreement with the interpreted structure based on direct observations (augerings and penetration tests). The landslide slip surface, internal morphology and palaeotopography were identified. A finite slope model was used to calculate the landslide safety factor based on the internal structure and geotechnical data. The evolution of this safety factor according to the rainfall and the groundwater levels shows that the landslides are more likely to occur after long episodes of high cumulative precipitations with an important role being played by the preliminary conditions and the rise of the surficial groundwater table level.

  13. Microperforation prolotherapy: a novel method for successful nonsurgical treatment of atraumatic spontaneous anterior sternoclavicular subluxation, with an illustrative case

    Directory of Open Access Journals (Sweden)

    Stein A

    2011-06-01

    Full Text Available Alvin Stein1, Scott McAleer2, Marty Hinz31Stein Orthopedic Associates, PA, Plantation, FL, USA; 2University of Central Florida, Orlando, FL, USA; 3Clinical Research, Neuroresearch Clinics, Inc, Cape Coral, FL, USABackground: Surgical repair of an atraumatic spontaneous anterior subluxation of the sternoclavicular joint (herein referred to as the “SCJ” is often associated with poor outcome expectations. With traditional treatment, successful conservative therapy usually incorporates major lifestyle alterations. This manuscript discusses a novel approach known as “microperforation prolotherapy”. To illustrate the technique, the care of a patient who benefitted from this treatment is reviewed.Purpose: To present a novel form of treatment with an illustrative case that demonstrates the potential efficacy of microperforation prolotherapy of the SCJ.Patient and methods: A novel approach to treatment of bilateral subluxation of the sternoclavicular joint with microperforation prolotherapy is discussed. The clinical course of a 21-year-old male with bilateral subluxation of the SCJ, which seriously hampered the patient's athletic and daily living activities, is used as a backdrop to the discussion.Results: Following microperforation prolotherapy, the instability of the SCJ was replaced by full stability, complete range of motion, and the opportunity to engage in all of the athletic endeavors previously pursued. There is no scar or other cosmetic defect resulting from the treatment received.Conclusion: Anterior sternoclavicular joint subluxation has a poor record of complete recovery with surgical procedures or conservative measures with regard to providing restoration of full lifestyle function. This manuscript documents a novel microperforation prolotherapy treatment that induced healing and restored full stability to the ligament structures responsible for the condition in a completely safe and effective fashion, allowing the patient to resume

  14. Research and practice of college mathematics case teaching method%大学数学案例教学法的研究与实践

    Institute of Scientific and Technical Information of China (English)

    田苗; 白雪洁; 李春兰

    2012-01-01

    为了改变传统数学课程重理论轻实践的教学现状,引导学生学以致用,采用案例教学法应用于大学数学课程教学,探讨了案例教学法的应用方案和实施成效。应用方案具体包括精选案例充实课堂教学、周密设计教学流程、丰富教学形式以及改革考核方式。实践证明案例教学法改变了传统的教学模式,提高了学生综合素质。%The traditional mathematic teaching methods only emphasize theory but ignor practice, while a case teaching method can guide students to apply what they have learned into practice effectively. In this paper, the case teaching method is applied in college mathematics class. The authors make efforts to perfect teaching content by elaborate selection of cases, well-designed teaching process, diversified teaching modes and examination methods. It is proved in practice that the case teaching method helps to improve the students' comprehensive ability.

  15. Variational assimilation in combination with a regularization method for sea level pressure retrieval from QuikSCAT scatterometer data Ⅱ: simulation experiment and actual case study

    Institute of Scientific and Technical Information of China (English)

    Zhang Liang; Huang Si-Xun; Shen Chun; Shi Wei-Lai

    2011-01-01

    The sea level pressure field can be computed from sea surface winds retrieved from satellite microwave scatterometer measurements,based on variational assimilation in combination with a regularization method given in part I of this paper.First,the validity of the new method is proved with a simulation experiment.Then,a new processing procedure for the sea level pressure retrieval is built by combining the geostrophic wind,which is computed from the scatterometer 10-meter wind using the University of Washington planetary boundary layer model using this method.Finally,the feasibility of the method is proved using an actual case study.

  16. Using of the Boolean Stochastic Generation method to target field investigations: the Mortisa landslide (eastern Italian Alps) case study

    Science.gov (United States)

    Bossi, Giulia; Marcato, Gianluca; Gottardi, Guido; Borgatti, Lisa

    2016-04-01

    When designing the geotechnical model of a landslide the information to define the soil profile within the slope is usually inferred from a small amount of data. This is particularly true for large landslides where the study area is vast and the variability of terrains is high. In this framework, a method allowing the best locations for further field investigation campaigns to be identified would be extremely useful. The Boolean Stochastic Generation method (BoSG), which randomly generates different soil distributions of two definite soil types in both 2D and 3D models, is a newly developed algorithm that can guide in this process. In this work the method has been applied to the Mortisa landslide case study, which is located in the Cortina d'Ampezzo valley (Veneto, Italy), part of the Dolomites UNESCO World Heritage list. The mudslide is 3.5 km long, stretching from 1750 to 1300 m a.s.l., and is located in a highly antrophized area where is damaging some buildings and a national road with its almost continuous movements. In fact, from year 2008, GNSS surveys recorded rates of displacements reaching 1.2 m/year in the most active parts of the landslide; the movements occur on a slip surfaces are located between 20 and 50 m below the surface. From the borecores some wooden samples were extracted allowing to reconstruct the sequence of events that led to the development of the present-day Mortisa slope. Interdigitated layers of gravel in a silty clay matrix originated from subsequent earth and debris flows events since the Lateglacial compose the landslide body, a condition that is particularly apt to be investigated with BoSG. A BoSG run for the Mortisa landslide was performed calculating 1200 soil configurations and using laboratory test parameters for the silty-clay matrix. The results were stacked in a tridimensional matrix in order to calculate the mean and the standard deviation (SD) of displacements for each element of the model mesh. In this way maps of the SD

  17. [Evaluation of work styles using the clinical case method at the departments of mental health in the region of Campania].

    Science.gov (United States)

    Morosini, P L; Manaresi, F; Veltro, F; Barone, R; Pasquini, P

    1992-01-01

    In the present study, designed after the Australian "Quality Assurance Project", the same 9 clinical "vignettes" relative to 3 schizophrenia cases, 3 depressives and 3 neurosis were read by 48 psychiatrists of the Campania Region (Italy). For each case, the psychiatrists were requested to give their opinions on best place of treatment, psycoactive drugs, psychotherapy, etc. A remarkable variability among psychiatrists was observed, regarding not only psycotherapy but drug therapy as well.

  18. Research on Part Case Retrieval Method Based on Process Similarity%基于工艺相似的零件实例检索方法研究

    Institute of Scientific and Technical Information of China (English)

    陈静; 龚志伟; 刘黎; 成阳

    2012-01-01

    实例表示与相似实例检索是基于实例推理CAPP工艺决策的关键.依据零件形状特征信息模型,建立零件形状特征实例表示模型,提出基于工艺相似的零件实例多层次检索方法.分析了基于工艺相似的零件形状特征间的可比性,给出了复合特征层、基本特征层和简单特征层的零件形状相似度计算和零件实例检索方法,并以箱体零件为例验证了复合特征层零件形状相似度计算方法的有效性.%Case representation and similar case retrieval were the keys to the CAPP technology decision based on case reasoning. A case representation model of part shape feature was built based on information model of part shape feature. A multilayer part case retrieval method was proposed, which was based on process similarity. The comparability between part shape features was analyzed based on process similarity. The part form similarity calculation and part case retrieval methods in compound feature layer, basic characteristic layer and simple feature layer were presented. The validity of this part case retrieval method on compound feature layer was verified by an example of box part.

  19. Simplified method for esophagus protection during radiofrequency catheter ablation of atrial fibrillation - prospective study of 704 cases

    Directory of Open Access Journals (Sweden)

    José Carlos Pachón Mateos

    2015-04-01

    Full Text Available AbstractIntroduction:Although rare, the atrioesophageal fistula is one of the most feared complications in radiofrequency catheter ablation of atrial fibrillation due to the high risk of mortality.Objective:This is a prospective controlled study, performed during regular radiofrequency catheter ablation of atrial fibrillation, to test whether esophageal displacement by handling the transesophageal echocardiography transducer could be used for esophageal protection.Methods:Seven hundred and four patients (158 F/546M [22.4%/77.6%]; 52.8±14 [17-84] years old, with mean EF of 0.66±0.8 and drug-refractory atrial fibrillation were submitted to hybrid radiofrequency catheter ablation (conventional pulmonary vein isolation plus AF-Nests and background tachycardia ablation with displacement of the esophagus as far as possible from the radiofrequency target by transesophageal echocardiography transducer handling. The esophageal luminal temperature was monitored without and with displacement in 25 patients.Results:The mean esophageal displacement was 4 to 9.1cm (5.9±0.8 cm. In 680 of the 704 patients (96.6%, it was enough to allow complete and safe radiofrequency delivery (30W/40ºC/irrigated catheter or 50W/60ºC/8 mm catheter without esophagus overlapping. The mean esophageal luminal temperature changes with versus without esophageal displacement were 0.11±0.13ºC versus 1.1±0.4ºC respectively, P<0.01. The radiofrequency had to be halted in 68% of the patients without esophageal displacement because of esophageal luminal temperature increase. There was no incidence of atrioesophageal fistula suspected or confirmed. Only two superficial bleeding caused by transesophageal echocardiography transducer insertion were observed.Conclusion:Mechanical esophageal displacement by transesophageal echocardiography transducer during radiofrequency catheter ablation was able to prevent a rise in esophageal luminal temperature, helping to avoid esophageal thermal

  20. An objective method based on assemblages of subfossil plant macro-remains to reconstruct past natural vegetation : a case study at Swifterbant, The Netherlands

    NARCIS (Netherlands)

    Schepers, Mans; Scheepens, J. F.; Cappers, Rene T. J.; van Tongeren, Onno F. R.; Raemaekers, Daan C. M.; Bekker, Renee M.; Schepers, 28286

    2013-01-01

    We present a new method of identifying past plant communities based on a palaeobotanical dataset. The dataset used as a case study consists of plant macro-remains retrieved from the Neolithic settlement Swifterbant S4, The Netherlands. Taxa were grouped based on their present-day concurrence values.

  1. Examining the Impact of a Video Case-Based Mathematics Methods Course on Secondary Pre-Service Teachers' Skills at Analysing Students' Strategies

    Science.gov (United States)

    Martinez, Mara Vanina; Superfine, Alison Castro; Carlton, Theresa; Dasgupta, Chandan

    2015-01-01

    This paper focuses on results from a study conducted with two cohorts of pre-service teachers (PSTs) in a video case-based mathematics methods course at a large Midwestern university in the US. The motivation for this study was to look beyond whether or not PSTs pay attention to mathematical thinking of students, as shown by previous studies when…

  2. Evaluating statistical and clinical significance of intervention effects in single-case experimental designs: An SPSS method to analyze univariate data

    NARCIS (Netherlands)

    M. Maric; M. de Haan; S.M. Hogendoorn; L.H. Wolters; H.M. Huizenga

    2015-01-01

    Single-case experimental designs are useful methods in clinical research practice to investigate individual client progress. Their proliferation might have been hampered by methodological challenges such as the difficulty applying existing statistical procedures. In this article, we describe a data-

  3. Water-Energy Nexus: the case of biogas production from energy crops evaluated by Water Footprint and LCA methods

    Science.gov (United States)

    Pacetti, Tommaso; Caporali, Enrica; Federici, Giorgio

    2015-04-01

    This study analyzes the production of biogas from aerobic digestion of energy crops. The production of biogas is an important case study because its spread, similar to other sources of bioenergy, creates questions about the environmental effects, the competition in the food market as well as the progressive change of land use. In particular is hereby analyzed the nexus between bioenergy production and water, which plays a key role because water resources are often the limiting factor in energy production from energy crops. The environmental performances of biogas production were analyzed through Water Footprint (WF) and Life cycle assessment (LCA): the integration of LCA and WF represents an attempt of taking advantage of their complementary strengths in environmental assessment, trying to give a comprehensive analysis of bioenergy production sustainability. Eighteen scenarios were considered, trying to figure out the performances of different combinations of locations (north, center, south Italy), crops (maize, sorghum, wheat) and treatments (anaerobic digestion with water dilution or manure co-digestion). WF assessment shows that cultivation phase is the most impacting on water resource use along the entire system life cycle. In particular, water requirements for crop growth shows that sorghum is the more water saver crop (in terms of consumptive water use to produce the amount of crop needed to produce 1 GJ of biogas energy content). Moreover WF investigates the kind of water use and shows that wheat, despite being the most intensive water user, exploits more green water than the other crops.WF was evaluated with respect to water stress indicators for the Italian territory, underlining the higher criticalities associated with water use in southern Italy and identifying consumptive blue water use, in this area, as the main hotspot. Therefore biogas production from energy crops in southern Italy is unsustainable from a water management perspective. At a basin

  4. Genetic Algorithm-based Optimized Design Method for Casing String%基于遗传算法的套管柱优化设计方法

    Institute of Scientific and Technical Information of China (English)

    何英明; 王瑞和; 雷杨; 臧艳彬; 何英君

    2012-01-01

    In light of changeable external load of casing in complex geologic conditions, the optimized method to design casing string on the basis of genetic algorithm was established. The genetic algorithm theory was applied to determine the coding mode of chromosome, production method of initial population, and evaluation function of chromosome and genetic operation. Thus, the optimized design model for casing string on the basis of genetic algo- rithm was established to overcome the defects of complex calculation process and neglect of casing costs and risk factor in the traditional design method of casing string strength concerning complex geologic conditions. The design verification of some casing string in Puguang Gasfield shows that the design method is accurate and reliable. It improves the reliability of casing string and helps to reduce the costs. The present study offers the method to optimize the design of casing string in complex geologic conditions.%针对复杂地质条件下套管外载荷多变的特点,建立了基于遗传算法的套管柱优化设计方法。应用遗传算法理论,确定染色体编码方式、初始种群的产生方法、染色体评估函数及遗传操作,建立基于遗传算法的套管柱优化设计模型,从而克服了传统套管柱设计方法在复杂地质条件下套管柱强度设计中运算过程复杂,无法兼顾套管成本与风险因素的缺点。对普光气田某井套管柱进行的设计验证情况表明,该方法设计结果准确可靠,既提高了套管柱可靠性,又有利于降低成本。该项研究为复杂地质条件下优化套管柱设计提供了新的方法。

  5. Systematic Review of Methods in Low-Consensus Fields: Supporting Commensuration through `Construct-Centered Methods Aggregation' in the Case of Climate Change Vulnerability Research.

    Science.gov (United States)

    Delaney, Aogán; Tamás, Peter A; Crane, Todd A; Chesterman, Sabrina

    2016-01-01

    There is increasing interest in using systematic review to synthesize evidence on the social and environmental effects of and adaptations to climate change. Use of systematic review for evidence in this field is complicated by the heterogeneity of methods used and by uneven reporting. In order to facilitate synthesis of results and design of subsequent research a method, construct-centered methods aggregation, was designed to 1) provide a transparent, valid and reliable description of research methods, 2) support comparability of primary studies and 3) contribute to a shared empirical basis for improving research practice. Rather than taking research reports at face value, research designs are reviewed through inductive analysis. This involves bottom-up identification of constructs, definitions and operationalizations; assessment of concepts' commensurability through comparison of definitions; identification of theoretical frameworks through patterns of construct use; and integration of transparently reported and valid operationalizations into ideal-type research frameworks. Through the integration of reliable bottom-up inductive coding from operationalizations and top-down coding driven from stated theory with expert interpretation, construct-centered methods aggregation enabled both resolution of heterogeneity within identically named constructs and merging of differently labeled but identical constructs. These two processes allowed transparent, rigorous and contextually sensitive synthesis of the research presented in an uneven set of reports undertaken in a heterogenous field. If adopted more broadly, construct-centered methods aggregation may contribute to the emergence of a valid, empirically-grounded description of methods used in primary research. These descriptions may function as a set of expectations that improves the transparency of reporting and as an evolving comprehensive framework that supports both interpretation of existing and design of future

  6. [Estimation of Topsoil Carbon Sequestration Potential of Cropland Through Different Methods: A Case Study in Zhuanglang County, Gansu Province].

    Science.gov (United States)

    Shi, Chen-di; Xu, Ming-xiang; Qiu, Yu-jie

    2016-03-15

    By analyzing the sampled data and the SOC data of the second national soil survey by the mid 80s and the national cultivated land quality evaluation in 2006 in Zhuanglang County, the article studied the cropland topsoil organic carbon sequestration potential estimation using several different methods. The results showed that: (1) There was no significant difference among different estimation methods about cropland carbon sequestration potential in the same region. Taking cropland carbon sequestration potential in Zhuanglang County for example, the theoretical values estimated by maximum value method and classification grading method were 1. 13 Mt and 1.09 Mt, respectively. (2) The real values estimated by classification grading method, saturation method, weighting method were 0.37 Mt, 0.32 Mt, 0.28 Mt, respectively, which were about 1/3 of the theoretical value. (3) The SOC density increments to reach the real level of carbon sequestration potential estimated by classification grading method, saturation method and weighting method were 6.76 t · hm⁻², 5.21 t · hm⁻², 4.56 t · hm⁻² respectively. According to the topsoil carbon sequestration rate of cropland in Zhuanglang county in the recent 30 a, it would need about 24-34 a to achieve the real level. (4) At the county scale, the weighted method was superior to the saturation value method, and the saturation value method was better than the classification grading method in the actual carbon sequestration potential estimation. The classification grading method was better than the maximum value method in the ideal carbon sequestration potential estimation.

  7. Comparison of different approaches for evaluation of the detection and quantitation limits of a purity method: a case study using a capillary isoelectrofocusing method for a monoclonal antibody.

    Science.gov (United States)

    Apostol, Izydor; Miller, Karen J; Ratto, Joseph; Kelner, Drew N

    2009-02-01

    Several different techniques suggested by the International Conference on Harmonization (ICH) Q2R1 guideline were used to assess the signal and concentration at the limit of detection (LOD) and limit of quantitation (LOQ) for a purity method. These approaches were exemplified with a capillary isoelectrofocusing (cIEF) method, which has been developed to quantify the distribution of the charge isoforms of a monoclonal antibody. The charge isoforms are the result of incomplete posttranslational processing of C-terminal lysine residues of the heavy chain by carboxypeptidase. Results showed no significant discrepancy between LOD/LOQ obtained by the different techniques. Validation experiments corroborated the calculated LOQ. The results indicate that any single technique can provide meaningful values for the LOD and LOQ. Finally, important points to consider when applying these techniques to purity methods are discussed.

  8. 浅谈案例教学法与培养创新人才%On the Case Method and Cultivating Innovative Talents

    Institute of Scientific and Technical Information of China (English)

    马金友; 吴时国

    2012-01-01

    培养创新人才是素质教育和创新教育的要求.文章简要介绍了案例教学具有培养创新人才的特征,通过比较传统教学法与案例教学法,彰显了案例教学法对培养创新人才的优势,进一步论证了案例教学对培养学生创新能力的价值,即案例教学有利于培养学生创新思维能力,有利于刺激学生求知创新的欲望,有利于激活学生创新天性.有利于培养学生创新意识.并提出案例教学重在精选案例:案例要有针对性、现实性、典型性、基本性和有多样性.%The cultivation of innovative talents is the requirement of the quality education and innovation education. The article briefly describes that the case teaching has the characteristics of nurturing creative talents. Through comparing the traditional leaching methods and case teaching, the advantages of the case teaching method to cultivate innovative talents are highlighted, and its value is further demonstrated, that is, cases teaching can cultivate students' creative thinking ability, stimulate the students' desire of innovation, activate students' innovative nature and develop students' awareness of innovation. The paper proposes that the case teaching focuses on the selection of cases and cases should be targeted, realistic and typical, basic and diversity.

  9. Evidence-based case selection: An innovative knowledge management method to cluster public technical and vocational education and training colleges in South Africa

    Directory of Open Access Journals (Sweden)

    Margaretha M. Visser

    2017-01-01

    Full Text Available Background: Case studies are core constructs used in information management research. A persistent challenge for business, information management and social science researchers is how to select a representative sample of cases among a population with diverse characteristics when convenient or purposive sampling is not considered rigorous enough. The context of the study is post-school education, and it involves an investigation of quantitative methods of clustering the population of public technical and vocational education and training (TVET colleges in South Africa into groups with a similar level of maturity in terms of their information systems.Objectives: The aim of the study was to propose an evidence-based quantitative method for the selection of cases for case study research and to demonstrate the use and usefulness thereof by clustering public TVET colleges.Method: The clustering method was based on the use of a representative characteristic of the context, as a proxy. In this context of management information systems (MISs, website maturity was used as a proxy and website maturity model theory was used in the development of an evaluation questionnaire. The questionnaire was used for capturing data on website characteristics, which was used to determine website maturity. The websites of the 50 public TVET colleges were evaluated by nine evaluators. Multiple statistical techniques were applied to establish inter-rater reliability and to produce clusters of colleges.Results: The analyses revealed three clusters of public TVET colleges based on their website maturity levels. The first cluster includes three colleges with no websites or websites at a low maturity level. The second cluster consists of 30 colleges with websites at an average maturity level. The third cluster contains 17 colleges with websites at a high maturity level.Conclusion: The main contribution to the knowledge domain is an innovative quantitative method employing a

  10. Using the Delphi Method for Selecting Effective Rehabilitation Practices for Case Study Research: Methods, Challenges, and Solutions and Implications for Future Research

    Science.gov (United States)

    Fleming, Allison R.; Boeltzig-Brown, Heike; Foley, Susan M.

    2015-01-01

    Purpose: We describe a modified Delphi method used to select effective state vocational rehabilitation agency practices to prioritize rehabilitation services for individuals with most significant disabilities within the context of Order of Selection, an area where there is little known and published. Specifically, we describe how we applied the…

  11. Comparison analysis of sampling methods to estimate regional precipitation based on the Kriging interpolation methods:A case of northwestern China

    Institute of Scientific and Technical Information of China (English)

    JinKui Wu; ShiWei Liu; LePing Ma; Jia Qin; JiaXin Zhou; Hong Wei

    2016-01-01

    The accuracy of spatial interpolation of precipitation data is determined by the actual spatial variability of the precipitation, the interpolation method, and the distribution of observatories whose selections are particularly important. In this paper, three spatial sampling programs, including spatial random sampling, spatial stratified sampling, and spatial sandwich sampling, are used to analyze the data from meteorological stations of northwestern China. We compared the accuracy of ordinary Kriging interpolation methods on the basis of the sampling results. The error values of the regional annual pre-cipitation interpolation based on spatial sandwich sampling, including ME (0.1513), RMSE (95.91), ASE (101.84), MSE (−0.0036), and RMSSE (1.0397), were optimal under the premise of abundant prior knowledge. The result of spatial stratified sampling was poor, and spatial random sampling was even worse. Spatial sandwich sampling was the best sampling method, which minimized the error of regional precipitation estimation. It had a higher degree of accuracy compared with the other two methods and a wider scope of application.

  12. Phosphate analysis of natural sausage casings preserved in brines with phosphate additives as inactivating agent – Method validation

    NARCIS (Netherlands)

    Wijnker, J.J.; Tjeerdsma - van Bokhoven, J.L.M.; Veldhuizen, E.J.A.

    2009-01-01

    Certain phosphates have been identified as suitable additives for the improvement of the microbial and mechanical properties of processed natural sausage casings. When mixed with NaCl (sodium chloride) and used under specific treatment and storage conditions, these phosphates are found to prevent th

  13. Application of Elements of Numerical Methods in the Analysis of Journal Bearings in AC Induction Motors: An Industry Case Study

    Science.gov (United States)

    Ahrens, Fred; Mistry, Rajendra

    2005-01-01

    In product engineering there often arise design analysis problems for which a commercial software package is either unavailable or cost prohibitive. Further, these calculations often require successive iterations that can be time intensive when performed by hand, thus development of a software application is indicated. This case relates to the…

  14. Pathways for Success in Developing a Nature Trail at a Zoo: A Mixed-Methods Evaluative Case Study

    Science.gov (United States)

    Hendrickson, Carol F.

    2010-01-01

    Modern zoos serve as tourist attractions and recreational facilities, while providing educational outreach programs in ecology, conservation, and animal needs. However, in the 21st century, there has been a negative backlash of people associating zoos with animals being shut away in cages or pits. This case study included an examination of the…

  15. The use of marine geophysical methods in Geo-Engineering investigations of Dams/ Barrages - a case study of Kosi Barrage

    Digital Repository Service at National Institute of Oceanography (India)

    Vora, K.H.; Naidu, P.D.

    can be helpful in design and maintenance of dams and barrages, with a case history from the Kosi Barrage, Birpur, Bihar. THE KOSI BARRAGE The Kosi barrage is situated at the foot hills of the Himalayas at Hanumannagar in Nepal, near the Indo - Nepal...

  16. Direct comparison of phase-sensitive vibrational sum frequency generation with maximum entropy method: case study of water.

    Science.gov (United States)

    de Beer, Alex G F; Samson, Jean-Sebastièn; Hua, Wei; Huang, Zishuai; Chen, Xiangke; Allen, Heather C; Roke, Sylvie

    2011-12-14

    We present a direct comparison of phase sensitive sum-frequency generation experiments with phase reconstruction obtained by the maximum entropy method. We show that both methods lead to the same complex spectrum. Furthermore, we discuss the strengths and weaknesses of each of these methods, analyzing possible sources of experimental and analytical errors. A simulation program for maximum entropy phase reconstruction is available at: http://lbp.epfl.ch/.

  17. A comparison of numerical and semi-analytical methods for the case of heat transfer equations arising in porous medium

    Science.gov (United States)

    Parand, K.; Rad, J. A.; Ahmadi, M.

    2016-09-01

    Natural convective heat transfer in porous media which is of importance in the design of canisters for nuclear waste disposal has received considerable attention during the past few decades. This paper presents a comparison between two different analytical and numerical methods, i.e. pseudospectral and Adomian decomposition methods. The pseudospectral approach makes use of the orthogonal rational Jacobi functions; this method reduces the solution of the problem to a solution of a system of algebraic equations. Numerical results are compared with each other, showing that the pseudospectral method leads to more accurate results and is applicable on similar problems.

  18. Reconstruction of trachea-esophagus vocalization by tunnel method in 12 cases%隧道法气管食管发音重建术12例

    Institute of Scientific and Technical Information of China (English)

    黄维平; 闫玉纪; 王晓红

    2002-01-01

    Objective To study the therapeutic effect of reconstruction in improving trachea esophagus vocalization after total laryngectomy.Method We reviewed the reconstruction of vocalization with trachea esophagus tunnel in 12 cases patients of total laryngectomy,i.e. a triangular mucous valve was made by incision of the posterior wall of the trachea with the correlative anterior wall of the esophagus made into a tunnel and the mucous valve would vocalize.Result 11 of the 12 cases obtained successful vocalization,counting for 91% of the total. Atresia of the vocalizing valve occurred in one case.Conclusion Trachea esophagus tunnel vocalization reconstruction has better therapeutic effect with good vocalization effect and fewer complications and easily performed.It avoided the shortcomings of necrosis and atresia of the vocalization valve and pharyngeal fistula formation,and the complexity of exchange of artificial vocalization tube again and again.

  19. A method for detecting epistasis in genome-wide studies using case-control multi-locus association analysis

    OpenAIRE

    Galan Jose; Quintas Antonio; Royo Jose; Sáez María; Bermudo Fernando; González-Pérez Antonio; Gayán Javier; Morón Francisco; Ramirez-Lorca Reposo; Real Luis; Ruiz Agustín

    2008-01-01

    Abstract Background The difficulty in elucidating the genetic basis of complex diseases roots in the many factors that can affect the development of a disease. Some of these genetic effects may interact in complex ways, proving undetectable by current single-locus methodology. Results We have developed an analysis tool called Hypothesis Free Clinical Cloning (HFCC) to search for genome-wide epistasis in a case-control design. HFCC combines a relatively fast computing algorithm for genome-wide...

  20. Applying a Hybrid QFD-TOPSIS Method to Design Product in the Industry (Case Study in Sum Service Company)

    OpenAIRE

    2012-01-01

    Electronics industry as an industry with high added value and television production industry especially as one of its pillars play an important role in the economy of each country. Therefore, the aim study of this paper is to illustrate how, using a combined QFD-TOPSIS model, organizations are able to their design product in accordance with requirements of consumers with a case study in Sum Service Company. Quality Function Deployment (QFD) is one such extremely important quality management t...

  1. The Role of Stone in Neolithic Monumental Art: case studies and methods of representation in Ireland and Brittany

    Directory of Open Access Journals (Sweden)

    Guillaume Robin

    2009-09-01

    Full Text Available In the last few decades, there has been a great deal of interest in the stone used as building material in megalithic monuments. Several studies have been carried out on the location of quarries and on the monumental and symbolic role of stones in various types of architecture (O'Sullivan 1996; 2006; Cooney 2000, 135-8. However, very few works exist on the relationship between the parietal art of these monuments and the materials that carry them (Shee 1973, 164; O'Sullivan 1997, 28. This is in contrast to work on the Upper Palaeolithic, where there have been several studies exploring the links between paintings and the relief of caves (Clottes 1996. In the case of Neolithic monumental art there are many questions left unanswered; is the stone only a support for the carved motifs? Is its role only practical, without significance? Or did it have a more developed function related to the symbolism of the carvings? In this article, we would like to show through different examples in Ireland and Brittany that the stone did have a role in Neolithic monumental art. Different case studies show that there are relationships between carvings and stone texture, stone colour and stone relief. After the presentation of these case studies we would like to show how three-dimensional modelling can be a relevant tool for this kind of archaeological question.

  2. Determination Instructions Efficiency of Teaching Methods in Teaching Physics in the Case of Teaching Unit "Viscosity. Newtonian and Stokes Law"

    Science.gov (United States)

    Radulovic, Branka; Stojanovic, Maja

    2015-01-01

    The use of different teaching methods has resulted in different quality and quantity of students' knowledge. For this reason, it is important to constantly review the teaching methods and applied most effectively. One way of determining instruction efficiency is by using cognitive load and student achievement. Cognitive load can be generally…

  3. A comparative study on methods for loss of life estimation: Applications to case studies in the United States

    NARCIS (Netherlands)

    Jonkman, S.N.; Maaskant, B.; Kolen, B.; Zethof, M.; Lehman, W.P.; Needham, J.T.

    2014-01-01

    In the Netherlands, USA and other countries methods for the analysis of loss of life and evacuation associated with flooding are used in flood risk management. This paper compares the methods from the US and Netherlands in this field and considers both methodological principles as well as the outcom

  4. A New Numerical Method of Determining Parameter Stability Bounds : SISO Linear System with Time-Varying Uncertainties Case

    Energy Technology Data Exchange (ETDEWEB)

    Kang, H.J. [Mando Machinery Co., Pyungtaek (Korea); Ko, J.W. [Yuhan College, Buchon (Korea); Park, M.N. [Yonsei University, Seoul (Korea)

    1999-06-01

    This note presents an efficient numerical method of determining a quadratic stability bound for SISO linear system with time-varying uncertainties. Based on the quadratic stability condition in Linear Matrix Inequalities (LMI) form, the proposed method gives a quadratic stability bound for each system parameter. As an example, the state feedback regulation problem is presented. (author). 12 refs.

  5. Site selection of temporary housing after earthquake by GIS and AHP method Case study: Region 6 of Shiraz

    Directory of Open Access Journals (Sweden)

    S. Givechi

    2013-01-01

    . can be temporarily used for temporary housing of damaged masses or temporary establishment of another important land use to continue urban life.Key words: Temporary housing, site selection, Disaster management, GIS, AHP MethodReferencesJifu Liu, Yida Fan, Piejun Shi (2011, Response to a high-Altitude Earthquake: The Yushu Earthquake example, Int J. Disaster risk sci, 2(1, 43-53Katerina R. Donevska, Pece V. Gorsevski (2011, Regional non-hazardous landfill site selection by integrating fuzzy logic, AHP and geographic information systems, Environ Earth Sci, 40-48McCoy, Jill, and Kevin Johnston.( 2001, Using ArcGIS Spatial Analyst: GIS by ESRI. Redlands, CA: Environmental Systems Research InstituteQiang Wu, Siyuan Ye, Xiong Wu, Pei Pei Chen(2004, Risk assessment of earth fractures by constructing an intrinsic vulnerability map, a specific vulnerability map and a hazard map, using Yuci city, Shanxi, china as an example, Environmental Geology, 46: 104-112Saaty, T.L (1980:”The Analytical Hierarchy Process, Planning Priority, Resource Allocation”RWS Publication, USA.Sule Tudes, Nazan Duygu Yigiter (2010, Preparation of land use planning model using GIS based on AHP, Case study Adana-Turkey, Bull Eng Geology Environment, 69: 235-245United Nations office for the coordination of humanitrain affairs (OCHA, (1995: the use of military and Defense Assets in relief operation

  6. 温潜法在男科疑难杂病中的应用%Application of Wenqian Method in Treating Difficult and Complicated Cases of Andrology Diseases

    Institute of Scientific and Technical Information of China (English)

    李俊涛

    2013-01-01

    目的:强调温潜法在男科疑难杂病治疗中的重要性.方法:通过对“肾阳潜藏的的重要性”、“温潜法的概念”、“温潜法的源流”、“肝肾阳气失于潜藏,易导致男科疾病发生”四方面的介绍,为温潜法治疗男科疑难杂病提供理论基础.最后通过病案介绍,来进一步加深对“温潜法在男科疑难杂病中的应用”的认识,进一步明确作者观点.结果:临床应用温潜法治疗男科疑难杂病,疗效显著.结论:温潜法在治疗男科疑难杂病中,疗效显著,温潜法为治疗男科疑难杂病拓宽了思路.%Emphasizing the importance of "Wenqian method" in the treatment of difficult and complicated cases of andrology diseases. Methods; Through the expounding of "the importance of Kidney-Yang Lurking" , "the definition of Wenqian method" , "the history of the application of Wenqian method" , and " Yangqi of Liver and Kidney losing lurking can easily cause andrology disease". It provided theoretic foundation for using "Wenqian method" to treat andrology disease; then further deepened the understanding of "using Wenqian method to treat difficult and complicated cases of andrology diseases" via examples of medical records to, and made the author's points more clear. Results; Using "Wenqian method" as guideline, the better efficacy could be achieved in clinical treatment of difficult and complicated cases of andrology diseases. Conclusions; Using "Wenqian method" to treat difficult and complicated cases of andrology diseases can get a conspicuous effect. Using "Wenqian method" as guideline, the thinking of treatment for this disease can be broadened.

  7. Review and Prioritization of Various Advertisement Methods by Meat Products Matrix Analytic Hierarchy Method (AHP: A Case Study of Sausages Products

    Directory of Open Access Journals (Sweden)

    Sara Esfandi

    2016-03-01

    Full Text Available Advertising is not only as a tool to increase company sales. Fast development of mass communication tools and added new mediums to advertising media have been introduced the advertising as a key element in the success or failure of a company. Due to the intense competition between companies and the fast growth of markets and changes in consumer behavior, advertising is taken into consideration as a major tool to create consumer awareness of products and services. Thus, in order to choose the best advertising method for meat products (sausages and salami, comments of 500 Shiraz citizens are collected by Cochran sampling and used in data analysis byAnalytical Hierarchy Process (AHP.After gathering the data, by synthesis the comments of respondents through arithmetic mean, the pairwise comparison matrix of criteria and priorities was formed to estimate the relative weights of them to achieve the goals of "the best method of advertising". The results indicated with respect to citizen viewpoints, the media advertisement, the street billboards, the advertising brochures, the advertising kiosks, and the purchase awards have the highest degree of importance with weight 0.430, 0.238, 0.139, 0.098 and 0.096, respectively. Due to the competition of different meat products factories, to make interest and encourage for purchasing a goods toward the competitor goods, it is necessary to use the persuasive advertisement.

  8. Identification of rice field using Multi-Temporal NDVI and PCA method on Landsat 8 (Case Study: Demak, Central Java)

    Science.gov (United States)

    Sukmono, Abdi; Ardiansyah

    2017-01-01

    Paddy is one of the most important agricultural crop in Indonesia. Indonesia’s consumption of rice per capita in 2013 amounted to 78,82 kg/capita/year. In 2017, the Indonesian government has the mission of realizing Indonesia became self-sufficient in food. Therefore, the Indonesian government should be able to seek the stability of the fulfillment of basic needs for food, such as rice field mapping. The accurate mapping for rice field can use a quick and easy method such as Remote Sensing. In this study, multi-temporal Landsat 8 are used for identification of rice field based on Rice Planting Time. It was combined with other method for extract information from the imagery. The methods which was used Normalized Difference Vegetation Index (NDVI), Principal Component Analysis (PCA) and band combination. Image classification is processed by using nine classes, those are water, settlements, mangrove, gardens, fields, rice fields 1st, rice fields 2nd, rice fields 3rd and rice fields 4th. The results showed the rice fields area obtained from the PCA method was 50,009 ha, combination bands was 51,016 ha and NDVI method was 45,893 ha. The accuracy level was obtained PCA method (84.848%), band combination (81.818%), and NDVI method (75.758%).

  9. Application of the fractal method to determine the membership function parameter for geoelectrical data (case study: Hamyj copper deposit, Iran)

    Science.gov (United States)

    Shahi Ferdows, Mohammad; Ramazi, Hamidreza

    2015-12-01

    The selection of a suitable membership function and its parameters plays a critical role in the integration of layer information by the fuzzy method. In this paper, parameters of membership function for induced polarization (IP) and resistivity (RS) data (in the Hamyj copper deposit) have been determined by the threshold parameter of IP and resistivity data, already determined by expert opinion or drilling data. The Hamyj deposit is located about 80 km west of Birjand city, South Khorasan province, Iran. In this area, resistivity and induced polarization data have been surveyed by dipole-dipole array. In this paper, outlier-induced polarization data have been corrected by the Doerffel method and then IP and resistivity data have been inversed by the Newton and Gauss-Newton methods. The threshold of the IP data is recognized by statistical (gap statistic) and fractal (concentration-area) methods. The determined threshold by the fractal method is higher than the gap statistic. These two thresholds have been used to determine the S-shape function for the IP data. The thresholds of the RS data are recognized by the fractal method. These two thresholds have been used to determine the Z-shape function for the RS data. The integration of geoelectrical layer information has been carried out by the Gama method. Finally, the best drilling points were proposed based on fuzzy modelling for the area. The results show that the optimum exploration borehole is located at a depth of 25 m.

  10. Feeling blue, going green and finding other attractive alternatives: a case of biphasic anaphylaxis to patent blue and a literature review of alternative sentinel node localisation methods.

    Science.gov (United States)

    Iqbal, Fahad Mujtaba; Basit, Abdul; Salem, Fathi; Vidya, Raghavan

    2015-12-15

    Patent blue dye is used for sentinel lymph node localisation in order to stage the axilla in patients with breast cancer. Patent blue is one of the most common dyes used across the UK, however, the incidence of adverse effects seems to be increasing. This case highlights our experience of a biphasic anaphylactic reaction to patent blue dye, and we conduct a brief literature review of alternative and more novel methods to adequately visualise the lymphatics for sentinel lymph node biopsy.

  11. [Content of parodontopathogenic microflora in cases of parodontitis of different severity degrees according to the data of polymerase chain reaction method].

    Science.gov (United States)

    Grudianov, A I; Ovchinnikova, V V

    2008-01-01

    The use of semiquantitative determination of parodontopathogenic microflora of parodontal pockets (PP) by polymerase chain reaction (PCR) in cases of chronic generalized parodontitis of different severity degrees was investigated. 63 patients were examined - 6 with light parodontitis, 16 with parodontitis of middle severity and 41 with heavy parodontitis. The content of PP was studied. DNA of the main representatives of parodontopathogenic microflora was determined by PCR method.

  12. A Case Study of Nearshore Wave Transformation Processes along the Coast of Mexico near the Laguna Verde Nuclear Power Plant Using a Fast Simulation Method

    Directory of Open Access Journals (Sweden)

    Israel-Enrique Herrera-Díaz

    2010-01-01

    numerical method was developed using a split proposed version of the mild-slope equation and solved by an implicit method in a finite volume grid; this technique easily allows model the wave effects caused by the breakwater building in coastal waters, where industrial and other economic activities take place. Controlled case studies have been made and the results match very well with the reference solution. The capability and utility of the model for real coastal areas are illustrated by application to the breakwater of the Laguna Verde Nuclear Power Plant (LVNPP.

  13. The Use of Modified Annandale’s Method in the Estimation of the Sediment Distribution in Small Reservoirs—A Case Study

    OpenAIRE

    Bogusław Michalec

    2014-01-01

    In the current study, the applicability of the Annandale method was verified based on the results of silting and sediment distribution measurements carried out in eight small reservoirs, with a capacity that does not exceed 5 million m3. It was found that the application of this method is possible only in the case of small reservoirs, in which the sediment load is deposited in the near-dam zone. The results of studies conducted on small reservoirs allowed the construction of a graph presentin...

  14. 基于案例教学法的C语言教学设计%C language teaching design based on case teaching method

    Institute of Scientific and Technical Information of China (English)

    杨阳

    2016-01-01

    针对公安院校学生主体的特殊性,结合高级语言程序设计课程,提出案例教学法。分析了案例教学法的特点,以选择结构为例,运用案例教学法分析教学设计过程。教学设计注重培养学生的学习兴趣,提高学生理论联系实际的能力。%In view of the particularity of police colleges students' learning, combined with high-level language programming courses, the case teaching method is put forward. Analyzed the characteristics of the case teaching method,taking "selection structure" as an example, the teaching design process is analyzed by using the case teaching method. The teaching design focuses on the cultivation of students' learning interest and the improvement of students' ability of integrating theory with practice.

  15. Method for seasonal precipitation reconstruction derived from snow and rainfall archives in Qing Dynasty:A case study in Shijiazhuang

    Institute of Scientific and Technical Information of China (English)

    ZHENG Jingyun; HAO Zhixin; GE Quansheng

    2004-01-01

    Two methods to reconstruct seasonal precipitation are developed in terms of the soil surface water balance and field infiltration experiment by artificial rainfall. Seasonal and annual precipitation for the period of 1736~1910 are reconstructed from snow and rainfall archives in the Qing Dynasty through both methods. The seasonal precipitation series from 1736 to 2000 is also established. The results show that the time series of seasonal precipitation obtained from both methods are statistically significant and consistent, implying that the seasonal precipitation can be reconstructed accurately from snow and rainfall archives in the Qing Dynasty by the above two methods, and thus the Chinese precipitation data in a large area would be extended to the early 18th century from 20th century (instrumental observation period).

  16. Multi-Objective Optimisation Method for Posture Prediction and Analysis with Consideration of Fatigue Effect and its Application Case

    CERN Document Server

    Ma, Liang; Chablat, Damien; Bennis, Fouad; Guillaume, François; 10.1016/j.cie.2009.06.003

    2009-01-01

    Automation technique has been widely used in manufacturing industry, but there are still manual handling operations required in assembly and maintenance work in industry. Inappropriate posture and physical fatigue might result in musculoskeletal disorders (MSDs) in such physical jobs. In ergonomics and occupational biomechanics, virtual human modelling techniques have been employed to design and optimize the manual operations in design stage so as to avoid or decrease potential MSD risks. In these methods, physical fatigue is only considered as minimizing the muscle or joint stress, and the fatigue effect along time for the posture is not considered enough. In this study, based on the existing methods and multiple objective optimisation method (MOO), a new posture prediction and analysis method is proposed for predicting the optimal posture and evaluating the physical fatigue in the manual handling operation. The posture prediction and analysis problem is mathematically described and a special application cas...

  17. A Case Report on Bilateral Knee Coverage Following Septic Arthritis: Lateral Distal Thigh Island Flap and Medial Head Gastrocnemius Flap Methods

    Directory of Open Access Journals (Sweden)

    Abdolrazaghi

    2016-03-01

    Full Text Available Introduction Septic arthritis is the rheumatological and orthopedic emergency that causes the most difficulties with joints–especially knee and hip joints. The clinical symptoms include pain, swelling, inflammation, stiffness, and a limited range of motion in both active and passive joints. Debridement of the necrotic tissue is one beneficial method for septic arthritis treatment, although soft tissue defects around joints are a challenging issue for surgeons. Our purpose was to investigate the consequences of two flap surgery methods undertaken to repair soft tissue damaged during knee joint debridement caused by septic arthritis. Case Presentation This is a case report concerning a patient who had septic arthritis in the knee area and so underwent soft tissue surgery. The reconstruction methods were not the same for both knees as the lateral distal thigh island flap reparation method was used on the left knee and the medial head gastrocnemius flap method was utilized on the right. We then investigated the results and outcomes of the surgery three months later. Conclusions Lower extremity movement extent was carefully evaluated and, in respect to muscle strength, the patient was able to walk independently three months after the surgery. The patient’s balance was studied and the results showed moderate levels of stability.

  18. Geochemical characterization of supraglacial debris via in situ and optical remote sensing methods: a case study in Khumbu Himalaya, Nepal

    OpenAIRE

    K. A. Casey; A. Kääb; D. I. Benn

    2012-01-01

    Surface glacier debris samples and field spectra were collected from the ablation zones of Nepal Himalaya Ngozumpa and Khumbu glaciers in November and December 2009. Geochemical and mineral compositions of supraglacial debris were determined by X-ray diffraction and X-ray fluorescence spectroscopy. This composition data was used as ground truth in evaluating field spectra and satellite supraglacial debris composition and mapping methods. Satellite remote sensing methods for ...

  19. Selecting the Location of a Nautical Tourism Port by Applying PROMETHEE And GAIA Methods Case Study – Croatian Northern Adriatic

    OpenAIRE

    Mirjana Kovačić

    2010-01-01

    In this paper, the author presents the multi-criteria analysis methods, PROMETHEE I and II and GAIA, used for selecting the location of a nautical tourism port. In an example of the selected location of a nautical tourism port in the Northern Adriatic, the author has used an analytic and graphical evaluation for solving such a problem. Particular attention has been paid to the use of GAIA method, which is suitable for visualisation of the problem characteristics through geometrical interpreta...

  20. The Use of Modified Annandale’s Method in the Estimation of the Sediment Distribution in Small Reservoirs—A Case Study

    Directory of Open Access Journals (Sweden)

    Bogusław Michalec

    2014-10-01

    Full Text Available In the current study, the applicability of the Annandale method was verified based on the results of silting and sediment distribution measurements carried out in eight small reservoirs, with a capacity that does not exceed 5 million m3. It was found that the application of this method is possible only in the case of small reservoirs, in which the sediment load is deposited in the near-dam zone. The results of studies conducted on small reservoirs allowed the construction of a graph presenting the relationship of a sum of dimensionless sediment load volume as a function of relative distance from the dam, which became the modification of the graph in Annandale’s method. The proposed modification of Annandale’s method considers reservoirs with a length less than 1000 m and capacity-inflow ratio ranging from a few per mille to a percent.

  1. [Application and case analysis on the problem-based teaching of Jingluo Shuxue Xue (Science of Meridian and Acupoint) in reference to the team oriented learning method].

    Science.gov (United States)

    Ma, Ruijie; Lin, Xianming

    2015-12-01

    The problem based teaching (PBT) has been the main approach to the training in the universities o the world. Combined with the team oriented learning method, PBT will become the method available to the education in medical universities. In the paper, based on the common questions in teaching Jingluo Shuxue Xue (Science of Meridian and Acupoint), the concepts and characters of PBT and the team oriented learning method were analyzed. The implementation steps of PBT were set up in reference to the team oriented learning method. By quoting the original text in Beiji Qianjin Yaofang (Essential recipes for emergent use worth a thousand gold), the case analysis on "the thirteen devil points" was established with PBT.

  2. The investigation of special information distilling method of land use in karst area based on CBERS-02B and analysis on application: a case study of Duyun, Guizhou

    Science.gov (United States)

    Hu, Juan; Luo, Miao; An, Yulun

    2010-09-01

    This paper explores the optimal methods for processing CBERS-02B images and using them to classify the land uses of karst mountain areas with 3S technologies, especially the RS digital image processing technology. Through multiple experiments and analysis, the difficulty of CBERS-02B images in distinguishing water from mountain shades, construction land from dry land and paddy field are satisfactorily removed. And the combination of band 421, based on OIF method, is proved optimal for classifying the land uses of karst areas. After comparing and evaluating the effect of HIS, PCA and HPC based image fusion methods, the HIS transformation based image fusion method is found best for CBERS-02B HR and CCD data fusion in the case of karst highland mountains. Based on the experiments, this paper proves that CBERS images are capable of large scale land use classification for karst areas, a competent substitute of TM images for karst mountain area land use survey.

  3. A new PI tuning method for an industrial process: A case study from a micro-cogeneration system

    DEFF Research Database (Denmark)

    Saglam, Gaye; Tutum, Cem Celal; Kurtulan, Sa,man

    2013-01-01

    Small scale strain gradient plasticity is coupled with a model of grain boundaries that take into account the energetic state of a plastically strained boundary and the slip and separation between neighboring grains. A microstructure of hexagonal grains is investigated using a plane strain finite...... element model. The results show that three different microstructural deformation mechanisms can be identified. The standard plasticity case in which the material behaves as expected from coarse grained experiments, the nonlocal plasticity region where size of the microstructure compared to some intrinsic...

  4. A Case Study on the Application of a Structured Experimental Method for Optimal Parameter Design of a Complex Control System

    Science.gov (United States)

    Torres-Pomales, Wilfredo

    2015-01-01

    This report documents a case study on the application of Reliability Engineering techniques to achieve an optimal balance between performance and robustness by tuning the functional parameters of a complex non-linear control system. For complex systems with intricate and non-linear patterns of interaction between system components, analytical derivation of a mathematical model of system performance and robustness in terms of functional parameters may not be feasible or cost-effective. The demonstrated approach is simple, structured, effective, repeatable, and cost and time efficient. This general approach is suitable for a wide range of systems.

  5. Falling parts of external walls claddings in case of fire – ITB test method – results comparison

    Directory of Open Access Journals (Sweden)

    Kinowski Jacek

    2016-01-01

    Full Text Available Paper presents ITB methodology of testing and assessment of buildings with regard to falling of external walls claddings in case of fire. In the ITB methodology of impact on the facade (external claddings was assumed in form of flames, generated from a specially designed propane, sand burner with a defined fuel flow rate and laminar airflow from the inside of the furnace resulting in determined temperature and height of the flame. Evaluated criterion is also discussed. Test results of several different types of claddings is analysed and presented in relation to the national Polish regulation along with some technical assessment regarding individual.

  6. Effectiveness of various nutrition education teaching methods for high school students: a case study in alabama, United States.

    Science.gov (United States)

    Sovyanhadi, Marta; Cort, Malcolm A

    2004-03-01

    This study examined a nutrition education program consisting of two content sessions: food-label reading, and food pyramid guide. In each session two groups of nutrition interns utilized four teaching methods: role-play/video presentation/display, grocery store tour, overhead transparency and lecture, and power point lecture, among a group of (N = 29) ninth grade, high school students. The purpose was to determine the most effective method of delivering nutrition education to high school students. Analysis using the Kruskal Wallis One-way Analysis of Variance showed that the combination method of role-playing/video presentation/visual display was most effective in the food pyramid session (χ² = 8.13, p = .04). While this method was given the highest rank in the food-label reading session it was not statistically significant. These results show that a combination of methods classified as the teacher's style, is more effective than a style that involves a single teaching method.

  7. Regionalized LCA-based optimization of building energy supply: method and case study for a Swiss municipality.

    Science.gov (United States)

    Saner, Dominik; Vadenbo, Carl; Steubing, Bernhard; Hellweg, Stefanie

    2014-07-01

    This paper presents a regionalized LCA-based multiobjective optimization model of building energy demand and supply for the case of a Swiss municipality for the minimization of greenhouse gas emissions and particulate matter formation. The results show that the environmental improvement potential is very large: in the optimal case, greenhouse gas emissions from energy supply could be reduced by more than 75% and particulate emissions by over 50% in the municipality. This scenario supposes a drastic shift of heat supply systems from a fossil fuel dominated portfolio to a portfolio consisting of mainly heat pump and woodchip incineration systems. In addition to a change in heat supply technologies, roofs, windows and walls would need to be refurbished in more than 65% of the municipality's buildings. The full potential of the environmental impact reductions will hardly be achieved in reality, particularly in the short term, for example, because of financial constraints and social acceptance, which were not taken into account in this study. Nevertheless, the results of the optimization model can help policy makers to identify the most effective measures for improvement at the decision making level, for example, at the building level for refurbishment and selection of heating systems or at the municipal level for designing district heating networks. Therefore, this work represents a starting point for designing effective incentives to reduce the environmental impact of buildings. While the results of the optimization model are specific to the municipality studied, the model could readily be adapted to other regions.

  8. Casting Method Design of Flywheel Case%飞轮壳的铸造工艺设计

    Institute of Scientific and Technical Information of China (English)

    郭毅; 高秀武

    2012-01-01

    HT250飞轮壳铸件采用HWS静压线造型、湿型砂铸造工艺.根据铸件的结构特点,把整个铸件放置在下型,法兰边向上,每型布置两件,上型砂胎喷涂涂料防止粘砂.浇注系统各单元截面尺寸为:∑F阻=13.5 cm2,F直=19.63 cm2,∑F内=31.68 cm2,∑F网=77 cm2.生产结果表明,飞轮壳铸件满足顾客要求.%The flywheel case was cast with 250 grade gray iron in greensatid mould on HWS SEIATZU moulding line. Considering the configuration characteristics of the casting,the whole casting was put into the drag mould with its flange upwards, two castings was made per mould, and the cod of the cope mould was to be coating -sprayed to prevent sand buming-on. The section areas of gating elements was as following: Σfchoke=13.5 cm2,Fspne=19.63 cm2, Σfingte=31.68 cm2, Σfiller=77 cm2. The result of production showed that the flywheel case casting met client's reqruirements.

  9. Anterior Skull Base Defects Reconstructed Using Three-Layer Method: 78 Consecutive Cases with Long-Term Follow-Up.

    Science.gov (United States)

    Geyik, Murat; Erkutlu, Ibrahim; Alptekin, Mehmet; Gezgin, Inan; Mizrak, Ayse; Dokur, Mehmet; Gok, Abdulvahap

    2016-12-01

    Objectives Anterior skull base defects are potentially lethal and surgical treatment must be performed as soon as possible. The purpose of this study was to evaluate whether our technique is effective or not in long-term period. Design Retrospective chart review of all patients whose data were entered into the Hospital Registry System between 1995 and 2015. Setting/Participants This study was performed at the Gaziantep University School of Medicine, Gaziantep, Turkey, in 2015 and included 78 patients who in the past 20 years underwent three-layer reconstruction surgery for anterior skull base defects at the same university. Main Outcome Measures Among the patients, defects repaired by transcranial approach had the lowest recurrence rate. Overall, successful repair was achieved in 100% of the patients. Results Pure transbasal approach was used as a single procedure on 71 (91%) patients. Combined approaches were used in seven (9%) cases. The extended transbasal approach was combined with a transfacial approach in four patients and with a pterional approach in three patients. Conclusion We encourage the use of three-layer reconstruction and recommend free fascia lata grafts and galeal flaps with vascularized pedicle as sealing material of choice in all types of cases such as tumor and trauma.

  10. 刑法学实务案例教学方式探析%The Application of Case Teaching Method in the Science of Criminal Law

    Institute of Scientific and Technical Information of China (English)

    孟庆华; 王法

    2014-01-01

    Criminal cases should be considered in the selection of typical cases and criminal law practice ,major criminal cases should keep pace with the times and selecting the case should be moderate difficulty and other factors .The undergraduate teaching of criminal law should focus on criminal law theory study ,in order to make the theory of criminal law is more easily accepted by students ,it is necessary to complement by further explanation .Graduate teaching of criminal law without copying USA “case teaching method” and the German “into” teaching method ,no need to restart to explore“complementary teaching method teaching method” and other new , as long as we adhere to the application and improvement of “three three” teaching mode .%刑法学实务案例教学应选择较为典型与重大的刑法实务案例,刑法实务案例应与时俱进,所选案例应当难易适中。本科刑法学教学应把重点放在刑法理论的学习上,而为了使刑法理论更易被学生所接受,就有必要辅之以适当的案例作进一步说明、阐述。研究生刑法学教学既无需照搬美国的“判例教学法”与德国的“归入法”教学方式,也无需重新去探讨“互补式教学法”等新的教学方式,只要进一步坚持适用与完善“三三制”教学方式即可。

  11. A needs analysis method for land-use planning of illegal dumping sites: a case study in Aomori-Iwate, Japan.

    Science.gov (United States)

    Ishii, Kazuei; Furuichi, Toru; Nagao, Yukari

    2013-02-01

    Land use at contaminated sites, following remediation, is often needed for regional redevelopment. However, there exist few methods of developing economically and socially feasible land-use plans based on regional needs because of the wide variety of land-use requirements. This study proposes a new needs analysis method for the conceptual land-use planning of contaminated sites and illustrates this method with a case study of an illegal dumping site for hazardous waste. In this method, planning factors consisting of the land-use attributes and related facilities are extracted from the potential needs of the residents through a preliminary questionnaire. Using the extracted attributes of land use and the related facilities, land-use cases are designed for selection-based conjoint analysis. A second questionnaire for respondents to the first one who indicated an interest in participating in the second questionnaire is conducted for the conjoint analysis to determine the utility function and marginal cost of each attribute in order to prioritize the planning factors to develop a quantitative and economically and socially feasible land-use plan. Based on the results, site-specific land-use alternatives are developed and evaluated by the utility function obtained from the conjoint analysis. In this case study of an illegal dumping site for hazardous waste, the uses preferred as part of a conceptual land-use plan following remediation of the site were (1) agricultural land and a biogas plant designed to recover energy from biomass or (2) a park with a welfare facility and an athletic field. Our needs analysis method with conjoint analysis is applicable to the development of conceptual land-use planning for similar sites following remediation, particularly when added value is considered.

  12. A method for analyzing the non-stationary nucleation and overall transition kinetics: A case of water

    Science.gov (United States)

    Mokshin, Anatolii V.; Galimzyanov, Bulat N.

    2014-01-01

    We present the statistical method as a direct extension of the mean first-passage time concept to the analysis of molecular dynamics simulation data of a phase transformation. According to the method, the mean first-passage time trajectories for the first (i = 1) as well as for the subsequent (i = 2, 3, 4,…) nucleation events should be extracted that allows one to calculate the time-dependent nucleation rate, the critical value of the order parameter (the critical size), the waiting times for the nucleation events, and the growth law of the nuclei - i.e., all the terms, which are usually necessary to characterize the overall transition kinetics. There are no restrictions in the application of the method by the specific thermodynamic regions; and the nucleation rate parameters are extracted according to their basic definitions. The method differs from the Wedekind-Bartell scheme and its modification [A. V. Mokshin and B. N. Galimzyanov, J. Phys. Chem. B 116, 11959 (2012)], where the passage-times for the first (largest) nucleus are evaluated only and where the average waiting time for the first nucleation event is accessible instead of the true steady-state nucleation time scale. We demonstrate an efficiency of the method by its application to the analysis of the vapor-to-liquid transition kinetics in water at the different temperatures. The nucleation rate/time characteristics and the droplet growth parameters are computed on the basis of the coarse-grained molecular dynamics simulation data.

  13. A method for analyzing the non-stationary nucleation and overall transition kinetics: A case of water

    Energy Technology Data Exchange (ETDEWEB)

    Mokshin, Anatolii V., E-mail: anatolii.mokshin@mail.ru; Galimzyanov, Bulat N. [Kazan Federal University, Kremlevskaya Street 18, 420000 Kazan (Russian Federation)

    2014-01-14

    We present the statistical method as a direct extension of the mean first-passage time concept to the analysis of molecular dynamics simulation data of a phase transformation. According to the method, the mean first-passage time trajectories for the first (i = 1) as well as for the subsequent (i = 2, 3, 4,…) nucleation events should be extracted that allows one to calculate the time-dependent nucleation rate, the critical value of the order parameter (the critical size), the waiting times for the nucleation events, and the growth law of the nuclei – i.e., all the terms, which are usually necessary to characterize the overall transition kinetics. There are no restrictions in the application of the method by the specific thermodynamic regions; and the nucleation rate parameters are extracted according to their basic definitions. The method differs from the Wedekind-Bartell scheme and its modification [A. V. Mokshin and B. N. Galimzyanov, J. Phys. Chem. B 116, 11959 (2012)], where the passage-times for the first (largest) nucleus are evaluated only and where the average waiting time for the first nucleation event is accessible instead of the true steady-state nucleation time scale. We demonstrate an efficiency of the method by its application to the analysis of the vapor-to-liquid transition kinetics in water at the different temperatures. The nucleation rate/time characteristics and the droplet growth parameters are computed on the basis of the coarse-grained molecular dynamics simulation data.

  14. Automated Dissolution for Enteric-Coated Aspirin Tablets: A Case Study for Method Transfer to a RoboDis II.

    Science.gov (United States)

    Ibrahim, Sarah A; Martini, Luigi

    2014-08-01

    Dissolution method transfer is a complicated yet common process in the pharmaceutical industry. With increased pharmaceutical product manufacturing and dissolution acceptance requirements, dissolution testing has become one of the most labor-intensive quality control testing methods. There is an increased trend for automation in dissolution testing, particularly for large pharmaceutical companies to reduce variability and increase personnel efficiency. There is no official guideline for dissolution testing method transfer from a manual, semi-automated, to automated dissolution tester. In this study, a manual multipoint dissolution testing procedure for an enteric-coated aspirin tablet was transferred effectively and reproducibly to a fully automated dissolution testing device, RoboDis II. Enteric-coated aspirin samples were used as a model formulation to assess the feasibility and accuracy of media pH change during continuous automated dissolution testing. Several RoboDis II parameters were evaluated to ensure the integrity and equivalency of dissolution method transfer from a manual dissolution tester. This current study provides a systematic outline for the transfer of the manual dissolution testing protocol to an automated dissolution tester. This study further supports that automated dissolution testers compliant with regulatory requirements and similar to manual dissolution testers facilitate method transfer.

  15. Free energy calculation of single molecular interaction using Jarzynski's identity method: the case of HIV-1 protease inhibitor system

    Institute of Scientific and Technical Information of China (English)

    De-Chang Li; Bao-Hua Ji

    2012-01-01

    Jarzynski' identity (JI) method was suggested a promising tool for reconstructing free energy landscape of biomolecular interactions in numerical simulations and experiments.However,JI method has not yet been well tested in complex systems such as ligand-receptor molecular pairs.In this paper,we applied a huge number of steered molecular dynamics (SMD) simulations to dissociate the protease of human immunodeficiency type I virus (HIV-1 protease)and its inhibitors.We showed that because of intrinsic complexity of the ligand-receptor system,the energy barrier predicted by JI method at high pulling rates is much higher than experimental results.However,with a slower pulling rate and fewer switch times of simulations,the predictions of JI method can approach to the experiments.These results suggested that the JI method is more appropriate for reconstructing free energy landscape using the data taken from experiments,since the pulling rates used in experiments are often much slower than those in SMD simulations.Furthermore,we showed that a higher loading stiffness can produce higher precision of calculation of energy landscape because it yields a lower mean value and narrower bandwidth of work distribution in SMD simulations.

  16. Testing automated liquid-based cytology samples with a manual liquid-based cytology method using residual cell suspensions from 500 ThinPrep cases.

    Science.gov (United States)

    Maksem, John A; Dhanwada, Vijaya; Trueblood, Joy E; Weidmann, James; Kane, Bruce; Bolick, David R; Bedrossian, Carlos W M; Kurtycz, Daniel F I; Stewart, Jim

    2006-06-01

    We report a technical improvement upon a previously disclosed manual liquid-based cytology (MLBC) method; and, we use the improved method to prepare slides from residual ThinPrep specimens in order to see how often ThinPrep diagnoses correspond to diagnoses derived from exhaustive examination of their parent sample suspensions. Residual cell suspensions from 500 ThinPrep cases comprising (1) 20 low-grade squamous intraepithelial lesions (LSILs); (2) 200 high risk (HR) negatives and 20 ASC-US; and (3) 260 screening cytology specimens were studied. Institutional review committee guidelines allowed us to know diagnoses by groups of specimens, but did not allow us to know individual patient diagnoses, so we could not perform case-by-case matched outcome-comparisons. Cells were concentrated by conventional centrifugation and sedimented into a polymer gel that was then vortex-mixed and converted into a viscous cell-rich suspension. The cell suspension was smeared between two clean glass slides, which were air-dried and stained with the Papanicolaou stain. Two study-sets were created, comprising one slide from each case. Each of the two study sets was examined by two cytopathologists, and discordant diagnoses were adjudicated. Because of the ambiguity involved in the "atypical" (ASC-US, ASC-H, AGC) diagnosis categories, only outcomes at the level of LSIL or greater were recorded. All MLBC SILs were digitally imaged and abnormal slides plus digital images were sent to the laboratory that provided the residual automated liquid-based cytology (ALBC) suspensions. The final diagnoses were confirmed by the laboratory that provided the residual ALBC specimens. MLBC slides of the 20 LSIL cases afforded 2 high-grade squamous intraepithelial lesions (HSILs) and 18 LSILs. Those of the 200 HR-Negatives showed 3 HSILs and 30 LSILs; and those of the 20 HR-ASC-US showed 3 HSILs and 9 LSILs. MLBC slides of the 260 screening cytology specimens showed 1 Carcinoma, 3 HSILs and 20 LSILs

  17. Mark-recapture and mark-resight methods for estimating abundance with remote cameras: a carnivore case study

    Science.gov (United States)

    Alanso, Robert S.; McClintock, Brett T.; Lyren, Lisa M.; Boydston, Erin E.; Crooks, Kevin R.

    2015-01-01

    Abundance estimation of carnivore populations is difficult and has prompted the use of non-invasive detection methods, such as remotely-triggered cameras, to collect data. To analyze photo data, studies focusing on carnivores with unique pelage patterns have utilized a mark-recapture framework and studies of carnivores without unique pelage patterns have used a mark-resight framework. We compared mark-resight and mark-recapture estimation methods to estimate bobcat (Lynx rufus) population sizes, which motivated the development of a new "hybrid" mark-resight model as an alternative to traditional methods. We deployed a sampling grid of 30 cameras throughout the urban southern California study area. Additionally, we physically captured and marked a subset of the bobcat population with GPS telemetry collars. Since we could identify individual bobcats with photos of unique pelage patterns and a subset of the population was physically marked, we were able to use traditional mark-recapture and mark-resight methods, as well as the new “hybrid” mark-resight model we developed to estimate bobcat abundance. We recorded 109 bobcat photos during 4,669 camera nights and physically marked 27 bobcats with GPS telemetry collars. Abundance estimates produced by the traditional mark-recapture, traditional mark-resight, and “hybrid” mark-resight methods were similar, however precision differed depending on the models used. Traditional mark-recapture and mark-resight estimates were relatively imprecise with percent confidence interval lengths exceeding 100% of point estimates. Hybrid mark-resight models produced better precision with percent confidence intervals not exceeding 57%. The increased precision of the hybrid mark-resight method stems from utilizing the complete encounter histories of physically marked individuals (including those never detected by a camera trap) and the encounter histories of naturally marked individuals detected at camera traps. This new estimator

  18. Monitoring of spine curvatures and posture during pregnancy using surface topography – case study and suggestion of method

    Directory of Open Access Journals (Sweden)

    Jakub Michoński

    2016-10-01

    Full Text Available Abstract Background Low back and pelvic pain is one of the most frequently reported disorders in pregnancy, however etiology and pathology of this problem have not been fully determined. The relationship between back pain experienced during pregnancy and posture remains unclear. It is challenging to measure reliably postural and spinal changes at the time of pregnancy, since most imaging studies cannot be used due to the radiation burden. 3D shape measurement, or surface topography (ST, systems designed for posture evaluation could potentially fill this void. A pilot study was conducted to test the potential of monitoring the change of spine curvatures and posture during pregnancy using surface topography. A single case was studied to test the methodology and preliminarily assess the usefulness of the procedure before performing a randomized trial. The apparatus used in this study was metrologically tested and utilized earlier in scoliosis screening. Case presentation The subject was measured using a custom-made structured light illumination scanner with accuracy of 0.2 mm. Measurement was taken every 2 weeks, between 17th and 37th week of pregnancy, 11 measurements in total. From the measurement the thoracic kyphosis and lumbar lordosis angles, and vertical balance angle were extracted automatically. Custom-written software was used for analysis. Oswestry Low Back Pain Disability Questionnaire (ODI was done with every measurement. The values were correctly extracted from the measurement. The results were: 50.9 ± 2.4° for kyphosis angle, 58.1 ± 2.1° for lordosis angle and 4.7 ± 1.7° for vertical balance angle. The registered change was 7.4° in kyphosis angle, 8.4° in lordosis angle and 5.5° in vertical balance angle. The calculated ODI values were between moderate disability and severe disability (22 to 58 %. Conclusions This case study presents that surface topography may be suitable for monitoring of spinal curvature

  19. Worst Case study method to assess the environmental impact of amine emissions from a CO{sub 2} capture plant

    Energy Technology Data Exchange (ETDEWEB)

    Karl, M.; Berglen, T.F.; Denby, B. (Norwegian Institute for Air Research, NILU, Kjeller (Norway)); Wright, R.F. (Norwegian Institute for Water Research, NIVA, Oslo (Norway))

    2011-07-15

    Use of amines is one of the leading technologies for post-combustion carbon capture from gas and coal-fired power plants. A CO{sub 2} capture plant using amine technology will release amines (as gas and dissolved in droplets) to the air. These will undergo photo-oxidation and other reactions to form hundreds of different chemical compounds in the atmosphere after their release. The main aim of the current study is to estimate the potential adverse human health and environmental impacts given ''worst case'' assumptions on emission, dispersion and deposition of amines and their photo-oxidation products. We used a 40 x 40 km2 study area in the vicinity of a planned 1 Mg/yr CO{sub 2} capture facility at the gas-fired power plant at Mongstad, western Norway. We assumed that the plant would release 40 t/yr monoethanol amine (MEA) and 5 t/yr diethyl amine. With respect to inhalation exposure, the recommended risk threshold for N-nitrosodiethylamine (0.02 ng/m3 in air; US EPA) was exceeded in the 40 x 40 km2 study region. Drinking water standards for nitrosamines would be exceeded by about a factor of 3. MEA concentrations would exceed toxicity limits for aquatic organisms also by about a factor of 3. The ''worst case'' conditions may be different at other sites because the geographic location and the local meteorology have a large influence on both the atmospheric dispersion of pollutants and the local exposure of the population and the environment. Additional toxicity studies and field experiments are necessary to investigate biodegradation and retention of the compounds in soil and water before final conclusions can be drawn with respect to the maximum allowable emissions of amines and their oxidation products from CO{sub 2} capture plants. The ''worst case'' approach can be applied to other emitted air pollutants. (Author)

  20. A quantitative method to analyse an open-ended questionnaire: A case study about the Boltzmann Factor

    Science.gov (United States)

    Rosario Battaglia, Onofrio; Di Paola, Benedetto

    2016-05-01

    This paper describes a quantitative method to analyse an open-ended questionnaire. Student responses to a specially designed written questionnaire are quantitatively analysed by not hierarchical clustering called k -means method. Through this we can characterise behaviour students with respect their expertise to formulate explanations for phenomena or processes and/or use a given model in the different context. The physics topic is about the Boltzmann Factor, which allows the students to have a unifying view of different phenomena in different contexts.