WorldWideScience

Sample records for behavior computer assisted

  1. Computer-assisted cognitive-behavioral therapy.

    Science.gov (United States)

    Spurgeon, Joyce A; Wright, Jesse H

    2010-12-01

    There has been a recent acceleration in the development and testing of programs for computer-assisted cognitive-behavioral therapy (CCBT). Programs are now available for treatment of depression, anxiety disorders, and other psychiatric conditions. Technology for delivery of CCBT includes multimedia programs, virtual reality, and handheld devices. Research on CCBT generally has supported the efficacy of computer-assisted therapy and has shown patient acceptance of computer tools for psychotherapy. Completion rates and treatment efficacy typically have been higher when clinicians prescribe and support the use of psychotherapeutic computer programs than when programs are delivered in a self-help format without clinician involvement. CCBT seems to have the potential to improve access to evidence-based therapies while reducing the demand for clinician time.

  2. Computer-Assisted Cognitive Behavioral Therapy for Child Anxiety: Results of a Randomized Clinical Trial

    Science.gov (United States)

    Khanna, Muniya S.; Kendall, Philip C.

    2010-01-01

    Objective: This study examined the feasibility, acceptability, and effects of Camp Cope-A-Lot (CCAL), a computer-assisted cognitive behavioral therapy (CBT) for anxiety in youth. Method: Children (49; 33 males) ages 7-13 (M = 10.1 [plus or minus] 1.6; 83.7% Caucasian, 14.2% African American, 2% Hispanic) with a principal anxiety disorder were…

  3. Computer-assisted cognitive behavioral therapy for children with epilepsy and anxiety: a pilot study.

    Science.gov (United States)

    Blocher, Jacquelyn B; Fujikawa, Mayu; Sung, Connie; Jackson, Daren C; Jones, Jana E

    2013-04-01

    Anxiety disorders are prevalent in children with epilepsy. The purpose of this study was to evaluate the efficacy, adaptability, and feasibility of a manual-based, computer-assisted cognitive behavioral therapy (CBT) intervention for anxiety disorders in children with epilepsy. Fifteen anxious youth (aged 8-13 years) with epilepsy completed 12 weeks of manualized computer-assisted CBT. The children and parents completed a semi-structured interview at baseline, and questionnaires assessing symptoms of anxiety, depression, and behavior problems were completed prior to treatment, at treatment midpoint, after treatment completion, and at three months posttreatment. There were significant reductions in the symptoms of anxiety and depression reported by the children at completion of the intervention and at the three-month follow-up. Similarly, the parents reported fewer symptoms of anxiety and a reduction in behavior problems. No adverse events were reported. This CBT intervention for children with epilepsy and anxiety disorders appears to be safe, effective, and feasible and should be incorporated into future intervention studies.

  4. Computer-assisted instruction

    NARCIS (Netherlands)

    Voogt, J.; Fisser, P.; Wright, J.D.

    2015-01-01

    Since the early days of computer technology in education in the 1960s, it was claimed that computers can assist instructional practice and hence improve student learning. Since then computer technology has developed, and its potential for education has increased. In this article, we first discuss th

  5. Effects of Computer-Assisted Instruction on Students' Knowledge of the Self-Determined Learning Model of Instruction and Disruptive Behavior

    Science.gov (United States)

    Mazzotti, Valerie L.; Wood, Charles L.; Test, David W.; Fowler, Catherine H.

    2012-01-01

    Instruction about goal setting can increase students' self-determination and reduce problem behavior. Computer-assisted instruction could offer teachers another format for teaching goal setting and self-determination. This study used a multiple probes across participants design to examine the effects of computer-assisted instruction on students'…

  6. COMPUTER-ASSISTED ACCOUNTING

    Directory of Open Access Journals (Sweden)

    SORIN-CIPRIAN TEIUŞAN

    2009-01-01

    Full Text Available What is computer-assisted accounting? Where is the place and what is the role of the computer in the financial-accounting activity? What is the position and importance of the computer in the accountant’s activity? All these are questions that require scientific research in order to find the answers. The paper approaches the issue of the support granted to the accountant to organize and manage the accounting activity by the computer. Starting from the notions of accounting and computer, the concept of computer-assisted accounting is introduced, it has a general character and it refers to the accounting performed with the help of the computer or using the computer to automate the procedures performed by the person who is doing the accounting activity; this is a concept used to define the computer applications of the accounting activity. The arguments regarding the use of the computer to assist accounting targets the accounting informatization, the automating of the financial-accounting activities and the endowment with modern technology of the contemporary accounting.

  7. Computer assisted audit techniques

    Directory of Open Access Journals (Sweden)

    Dražen Danić

    2008-12-01

    Full Text Available The purpose of this work is to point to the possibilities of more efficient auditing. In the encirclement of more and more intensive use of computer techniques that help to CAAT all the aims and the volume of auditing do not change when the audit is done in the computer-informatics environment. The computer assisted audit technique (CAATs can improve the efficiency and productivity of audit procedures. In the computerized information system, the CAATs are the ways in which an auditor can use computer to gather or as help in gathering auditing evidence. There are more reasons why the auditors apply computer techniques that help in auditing. Most often, they do it to achieve improvement of auditing efficiency when the data volume is large. It depends on several factors whether the auditors will apply the computer techniques that help auditing and to what degree respectively. If they do it, the most important are the computer knowledge, professional skill, experience of auditors, and availability of computer technique, and adequacy of computer supports, infeasibility of hand tests, efficiency and time limit. Through several examples from practice, we showed the possibilities of ACL as one of the CAAT tools.

  8. Computer assisted myelography

    Energy Technology Data Exchange (ETDEWEB)

    Tamakawa, Y.; Miyauchi, T.; Ogawa, T.; Saito, Y. (Akita Univ. (Japan))

    1981-11-01

    Spinal computed tomography was carried out after intrathecal introduction of metrizamide. This technique can clearly visualize the spinal subarachnoid space and structures contained in this space, and is an accurate and satisfactory modality for detecting spinal cord and various spinal lesions. In the cases with syringomyelia, the reflux of metrizamide into the syrinx was most marked several hours following intrathecal introduction of metrizamide. Computer assisted myelography with metrizamide is essential in the diagnosis of communicating sylingomyelia. It will demonstrate intraspinal extention and the total geography of the spinal cord tumor. Authors present their technique and results with representative cases of various spinal lesions.

  9. Quantifying fish swimming behavior in response to acute exposure of aqueous copper using computer assisted video and digital image analysis

    Science.gov (United States)

    Calfee, Robin D.; Puglis, Holly J.; Little, Edward E.; Brumbaugh, William G.; Mebane, Christopher A.

    2016-01-01

    Behavioral responses of aquatic organisms to environmental contaminants can be precursors of other effects such as survival, growth, or reproduction. However, these responses may be subtle, and measurement can be challenging. Using juvenile white sturgeon (Acipenser transmontanus) with copper exposures, this paper illustrates techniques used for quantifying behavioral responses using computer assisted video and digital image analysis. In previous studies severe impairments in swimming behavior were observed among early life stage white sturgeon during acute and chronic exposures to copper. Sturgeon behavior was rapidly impaired and to the extent that survival in the field would be jeopardized, as fish would be swept downstream, or readily captured by predators. The objectives of this investigation were to illustrate protocols to quantify swimming activity during a series of acute copper exposures to determine time to effect during early lifestage development, and to understand the significance of these responses relative to survival of these vulnerable early lifestage fish. With mortality being on a time continuum, determining when copper first affects swimming ability helps us to understand the implications for population level effects. The techniques used are readily adaptable to experimental designs with other organisms and stressors.

  10. Computer Assisted Audit Techniques

    Directory of Open Access Journals (Sweden)

    Eugenia Iancu

    2007-01-01

    Full Text Available From the modern point of view, audit takes intoaccount especially the information systems representingmainly the examination performed by a professional asregards the manner for developing an activity by means ofcomparing it to the quality criteria specific to this activity.Having as reference point this very general definition ofauditing, it must be emphasized that the best known segmentof auditing is the financial audit that had a parallel evolutionto the accountancy one.The present day phase of developing the financial audithas as main trait the internationalization of the accountantprofessional. World wide there are multinational companiesthat offer services in the financial auditing, taxing andconsultancy domain. The auditors, natural persons and auditcompanies, take part at the works of the national andinternational authorities for setting out norms in theaccountancy and auditing domain.The computer assisted audit techniques can be classified inseveral manners according to the approaches used by theauditor. The most well-known techniques are comprised inthe following categories: testing data techniques, integratedtest, parallel simulation, revising the program logics,programs developed upon request, generalized auditsoftware, utility programs and expert systems.

  11. Assisting People with Multiple Disabilities and Minimal Motor Behavior to Improve Computer Pointing Efficiency through a Mouse Wheel

    Science.gov (United States)

    Shih, Ching-Hsiang; Chang, Man-Ling; Shih, Ching-Tien

    2009-01-01

    This study evaluated whether two people with multiple disabilities and minimal motor behavior would be able to improve their pointing performance using finger poke ability with a mouse wheel through a Dynamic Pointing Assistive Program (DPAP) and a newly developed mouse driver (i.e., a new mouse driver replaces standard mouse driver, changes a…

  12. Computer Assisted Parallel Program Generation

    CERN Document Server

    Kawata, Shigeo

    2015-01-01

    Parallel computation is widely employed in scientific researches, engineering activities and product development. Parallel program writing itself is not always a simple task depending on problems solved. Large-scale scientific computing, huge data analyses and precise visualizations, for example, would require parallel computations, and the parallel computing needs the parallelization techniques. In this Chapter a parallel program generation support is discussed, and a computer-assisted parallel program generation system P-NCAS is introduced. Computer assisted problem solving is one of key methods to promote innovations in science and engineering, and contributes to enrich our society and our life toward a programming-free environment in computing science. Problem solving environments (PSE) research activities had started to enhance the programming power in 1970's. The P-NCAS is one of the PSEs; The PSE concept provides an integrated human-friendly computational software and hardware system to solve a target ...

  13. Computer-assisted Crystallization.

    Science.gov (United States)

    Semeister, Joseph J., Jr.; Dowden, Edward

    1989-01-01

    To avoid a tedious task for recording temperature, a computer was used for calculating the heat of crystallization for the compound sodium thiosulfate. Described are the computer-interfacing procedures. Provides pictures of laboratory equipment and typical graphs from experiments. (YP)

  14. Computer assisted medical history taking

    NARCIS (Netherlands)

    M.J. Quaak; A.P.M. Hasman (Arie)

    1988-01-01

    textabstractIn this thesis a study is described which was performed to explore the possibilities of computer-assisted history taking to support patient care. A system was developed by which the patient himself enters his medical data into a computer. The system enables an unexperienced user, i.e. a

  15. Computer-Assisted Instruction.

    Science.gov (United States)

    Broadbent, Brooke

    1990-01-01

    Provides insight into how computers can be used in union education. States that they will never replace an effective classroom environment where participants' questions are answered by instructors, but can support existing systems. (JOW)

  16. Computational Analysis of Behavior.

    Science.gov (United States)

    Egnor, S E Roian; Branson, Kristin

    2016-07-01

    In this review, we discuss the emerging field of computational behavioral analysis-the use of modern methods from computer science and engineering to quantitatively measure animal behavior. We discuss aspects of experiment design important to both obtaining biologically relevant behavioral data and enabling the use of machine vision and learning techniques for automation. These two goals are often in conflict. Restraining or restricting the environment of the animal can simplify automatic behavior quantification, but it can also degrade the quality or alter important aspects of behavior. To enable biologists to design experiments to obtain better behavioral measurements, and computer scientists to pinpoint fruitful directions for algorithm improvement, we review known effects of artificial manipulation of the animal on behavior. We also review machine vision and learning techniques for tracking, feature extraction, automated behavior classification, and automated behavior discovery, the assumptions they make, and the types of data they work best with.

  17. HIV-related risk behaviors among the general population: a survey using Audio Computer-Assisted Self-Interview in 3 cities in Vietnam.

    Science.gov (United States)

    Vu, Lan T H; Nadol, Patrick; Le, Linh Cu

    2015-03-01

    This study used a confidential survey method-namely, Audio Computer-Assisted Self-Interview (ACASI)-to gather data about HIV-related risk knowledge/behaviors among the general population in Vietnam. The study sample included 1371 people aged 15 to 49 years in 3 cities-Hanoi, Da nang, and Can Tho. Results indicated that 7% of participants had ever had nonconsensual sex, and 3.6% of them had ever had a one-night stand. The percentage of male participants reported to ever have sex with sex workers was 9.6% and to ever inject drugs was 4.3%. The proportion of respondents who had ever tested for HIV was 17.6%. The risk factors and attitudes reported in the survey indicate the importance of analyzing risk behaviors related to HIV infection among the general population. Young people, especially men in more urbanized settings, are engaging in risky behaviors and may act as a "bridge" for the transmission of HIV from high-risk groups to the general population in Vietnam.

  18. Computer assisted tutoring in radiology

    CERN Document Server

    Jeffery, N

    1997-01-01

    radiologists using the computer based image browser demonstrated significant differences in how the experts, novices and intermediates interact with the image archive via the overview plot. These findings are consistent with those found in previous novice-expert studies involving chest x-ray interpretation. There were significant differences between the experts and novice/intermediates in terms of their placement of cases within the overview plot with the experts placement of cases closer to the statistical placements. The users reaction to the overview plot were favourable with subjects commenting on its intuitiveness and ease of use. Hence, it is concluded that the overview space could serve as a useful tool in assisting the training of novice and intermediate radiologists providing a vehicle for moving the less experienced subjects towards the experts' conception of a disease. The research offers a methodology for teaching based on the integration of principles from cognitive science and statistics, and as...

  19. Computer assisted SCFE osteotomy planning

    Energy Technology Data Exchange (ETDEWEB)

    Drapikowski, Pawel [Poznan University of Technology, Institute of Control and Information Engineering, Poznan (Poland); Tyrakowski, Marcin; Czubak, Jaroslaw; Czwojdzinski, Adam [Postgraduate Medical Education Center, Department of Orthopaedics, Warsaw (Poland)

    2008-11-15

    Slipped capital femoral epiphysis (SCFE) is a common pediatric orthopedic disorder that requires surgical correction. Preoperative planning of a proximal femoral osteotomy is essential in cases of SCFE. This planning is usually done using 2D radiographs, but 3D data can be acquired with CT and analyzed with 3D visualization software. SCFEanalyzer is a computer program developed for preoperative planning of proximal femoral osteotomy to correct SCFE. Computed tomography scans were performed on human bone specimens: one pelvis and two femoral bones (right and left) and volume data of a patient. The CT data were used to test the abilities of the SCFEanalyzer software, which utilizes 3D virtual models of anatomic structures constructed from CT image data. Separation of anatomical bone structures is done by means of ''cutting'' 3D surface model of the pelvis. The software enables qualitative and quantitative spatial analysis of chosen parameters analogous to those done on the basis of plain radiographs. SCFEanalyzer makes it possible to evaluate the function of the hip joint by calculating the range of motion depending on the shape of bone structures based on oriented bounding box object representation. Pelvic and hip CT scans from a patient with SCFE were subjected to femoral geometry analysis and hip joint function assessment. These were done to plan and simulate osteotomy of the proximal femur. Analogous qualitative and quantitative evaluation after performing the virtual surgery were evaluated to determine the potential treatment effects. The use of computer assistance in preoperative planning enable us to increase objectivity and repeatability, and to compare the results of different types of osteotomy on the proximal femur, and thus to choose the optimal operation in each individual case. (orig.)

  20. Computer assisted radiology and surgery. CARS 2010

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2010-06-15

    The conference proceedings include contributions to the following topics: (1) CARS Clinical Day: minimally invasive spiral surgery, interventional radiology; (2) CARS - computer assisted radiology and surgery: ophthalmology, stimulation methods, new approaches to diagnosis and therapy; (3) Computer assisted radiology 24th International congress and exhibition: computer tomography and magnetic resonance, digital angiographic imaging, digital radiography, ultrasound, computer assisted radiation therapy, medical workstations, image processing and display; (4) 14th Annual conference of the International Society for computer aided surgery; ENT-CMF head and neck surgery computer-assisted neurosurgery, cardiovascular surgery, image guided liver surgery, abdominal and laparoscopic surgery, computer-assisted orthopedic surgery, image processing and visualization, surgical robotics and instrumentation, surgical modeling, simulation and education; (5) 28th International EuroPACS meeting: image distribution and integration strategies, planning and evaluation, telemedicine and standards, workflow and data flow in radiology; (6) 11th CARS/SPIE/EuroPACS joint workshop on surgical PACS and the digital operating, management and assessment of OR systems and integration; (7) 12th International workshop on computer-aided diagnosis: special session on breast CAD, special session on thoracic CAD, special session on abdominal brain, lumbar spine CAD; (8) 16th computed Maxillofacial imaging congress: computed maxillofacial imaging in dental implantology, orthodontics and dentofacial orthopedics; approaches to 3D maxillofacial imaging; surgical navigation; (9) 2nd EuroNOTES/CARS workshop on NOTES: an interdisciplinary challenge; (10) 2nd EPMA/CARS workshop on personalized medicine and ICT.; (11)poster sessions.

  1. Vibrations and Waves: Using Computer Assisted Learning.

    Science.gov (United States)

    Cox, M. J.; Lewis, D.

    Described is the development of computer assisted learning packages for nonscience major undergraduate students. The equipment needed to run the packages is described as well as the role and value of the packages. Several examples of the kind of computer graphics used in the computing laboratory are illustrated. The problems associated with the…

  2. Computer Vision Assisted Virtual Reality Calibration

    Science.gov (United States)

    Kim, W.

    1999-01-01

    A computer vision assisted semi-automatic virtual reality (VR) calibration technology has been developed that can accurately match a virtual environment of graphically simulated three-dimensional (3-D) models to the video images of the real task environment.

  3. A computer-assisted 3D model for analyzing the aggregation of tumorigenic cells reveals specialized behaviors and unique cell types that facilitate aggregate coalescence.

    Directory of Open Access Journals (Sweden)

    Amanda Scherer

    Full Text Available We have developed a 4D computer-assisted reconstruction and motion analysis system, J3D-DIAS 4.1, and applied it to the reconstruction and motion analysis of tumorigenic cells in a 3D matrix. The system is unique in that it is fast, high-resolution, acquires optical sections using DIC microscopy (hence there is no associated photoxicity, and is capable of long-term 4D reconstruction. Specifically, a z-series at 5 μm increments can be acquired in less than a minute on tissue samples embedded in a 1.5 mm thick 3D Matrigel matrix. Reconstruction can be repeated at intervals as short as every minute and continued for 30 days or longer. Images are converted to mathematical representations from which quantitative parameters can be derived. Application of this system to cancer cells from established lines and fresh tumor tissue has revealed unique behaviors and cell types not present in non-tumorigenic lines. We report here that cells from tumorigenic lines and tumors undergo rapid coalescence in 3D, mediated by specific cell types that we have named "facilitators" and "probes." A third cell type, the "dervish", is capable of rapid movement through the gel and does not adhere to it. These cell types have never before been described. Our data suggest that tumorigenesis in vitro is a developmental process involving coalescence facilitated by specialized cells that culminates in large hollow spheres with complex architecture. The unique effects of select monoclonal antibodies on these processes demonstrate the usefulness of the model for analyzing the mechanisms of anti-cancer drugs.

  4. Future Prospects for Computer-Assisted Mathematics

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, David H.; Borwein, Jonathan M.

    2005-10-26

    The recent rise of ''computer-assisted'' and ''experimental'' mathematics raises intriguing questions as to the future role of computation in mathematics. These results also draw into question the traditional distinctions that have been drawn between formal proof and computationally-assisted proof. This article explores these questions in the context of the growing consensus among computer technologists that Moore's Law is likely to continue unabated for quite some time into the future, producing hardware and software much more powerful than what is available today.

  5. Computer Assisted Teaching of FORTRAN.

    Science.gov (United States)

    Balman, T.

    1981-01-01

    Discusses an interactive programing system (FCN) developed to assist the teaching of FORTRAN. The educational advantages drawn from incremental compilation of FORTRAN programs, specialized subsystems that can be used for intensive training, the intended role of this programing system, and its contribution to the curriculum are described. (CHC)

  6. Computer-Assisted Discovery and Proof

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, David H.; Borwein, Jonathan M.

    2007-12-10

    With the advent of powerful, widely-available mathematical software, combined with ever-faster computer hardware, we are approaching a day when both the discovery and proof of mathematical facts can be done in a computer-assisted manner. his article presents several specific examples of this new paradigm in action.

  7. Computer Assisted Orthopaedic and Trauma Surgery

    NARCIS (Netherlands)

    Schep, Niels Willem Luitzen

    2003-01-01

    To create an environment where surgeons receive real-time feedback about their instrument position, computer technologies were integrated in surgical procedures. This type of surgical technology is referred to as Computer Assisted Surgery (CAS). CAS offers the possibility to continuously monitor the

  8. Smart computer-assisted markets.

    Science.gov (United States)

    McCabe, K A; Rassenti, S J; Smith, V L

    1991-10-25

    The deregulation movement has motivated the experimental study of auction markets designed for interdependent network industries such as natural gas pipelines or electric power systems. Decentralized agents submit bids to buy commodity and offers to sell transportation and commodity to a computerized dispatch center. Computer algorithms determine prices and allocations that maximize the gains from exchange in the system relative to the submitted bids and offers. The problem is important, because traditionally the scale and coordination economies in such industries were thought to require regulation. Laboratory experiments are used to study feasibility, limitations, incentives, and performance of proposed market designs for deregulation, providing motivation for new theory.

  9. Computer-assisted propofol administration.

    LENUS (Irish Health Repository)

    O'Connor, J P A

    2012-02-01

    The use of propofol for sedation in endoscopy may allow for better quality of sedation, quicker recovery and facilitate greater throughput in endoscopy units. The cost-effectiveness and utility of propofol sedation for endoscopic procedures is contingent on the personnel and resources required to carry out the procedure. Computer-based platforms are based on the patients response to stimulation and physiologic parameters. They offer an appealing means of delivering safe and effective doses of propofol. One such means is the bispectral index where continuous EEG recordings are used to assess the degree of sedation. Another is the closed-loop target-controlled system where a set of physical parameters, such as muscle relaxation and auditory-evoked potential, determine a level of medication appropriate to achieve sedation. Patient-controlled platforms may also be used. These electronic adjuncts may help endoscopists who wish to adopt propofol sedation to change current practices with greater confidence.

  10. Computer Assisted Assessment in Elementary Algebra

    OpenAIRE

    Bouhineau, Denis; Bronner, Alain; Chaachoua, Hamid; Mezerette, Sophie; Nicaud, Jean-François

    2005-01-01

    reviewed article for online journal available : http://mathstore.ac.uk/articles/maths-caa-series/nov2005/; Experiences and points of view from the APLUSIX project about Computer Assisted Assessment in Elementary Algebra (http://mathstore.ac.uk/articles/maths-caa-series/nov2005/)

  11. A Type of Computer-Assisted Instruction.

    Science.gov (United States)

    Ruplin, Ferdinand A.; Russell, John R.

    1968-01-01

    The experimental use of computer assisted instruction (CAI) to replace conventional laboratory sessions for first-year German students at the State University of New York, Stony Brook, is described. Materials used in the program are outlined, including hardware, pre-text program, text program, student manual, and diagnostics. Pedagogical…

  12. Introduction: Intelligent Computer-Assisted Language Instruction.

    Science.gov (United States)

    Bailin, Alan; Levin, Lori

    1989-01-01

    Presents an overview of intelligent computer-assisted language instruction (ICALI) research as a type of artificial intelligence research. Outlines the components and kinds of ICALI systems. Examines practical research considerations such as personnel needs for development of ICALI software. (Author/LS)

  13. COMPUTER-ASSISTED INSTRUCTION FOR FINANCIAL MANAGEMENT

    OpenAIRE

    Babb, Emerson M.

    1987-01-01

    This paper describes computer-assisted instruction for financial management which can be used to supplement an undergraduate course or to update training of persons in agribusiness. It is used to review principles of financial management, to illustrate analytical techniques, and to provide practice in the use of financial concepts and techniques. The material covered is similar to that found in traditional textbooks. Student evaluations of the software were fairly positive, but teaching effec...

  14. Computer-assisted Instruction And Discussion

    Institute of Scientific and Technical Information of China (English)

    梁海晶

    2008-01-01

    From drill-and-practice software,to word-processing programs,to network and hypertext software,the gradual integration of technology in classrooms over the last twenty years has tended to reflect the technological developments and more importantly the theories of learning and instruction developed by scholars.Thus,the introduction of network technologies in education coincided with a shift in education from an interest in cognitive and developmental theories of learning to a social and collaborative view of learning.The present paper focuses on synchronous computer-mediated interaction,namely computer-assisted instruction and discussion in the second language classroom.

  15. On advantages and limitations of computer-assisted language learning

    Institute of Scientific and Technical Information of China (English)

    刘玲

    2008-01-01

    Computer-assisted language learning (CALL) is used increasingly in foreign language teaching. Compared with the traditional teaching method, computer-assisted language learning has unparallel advantages, but in fact it does have some limitations in some aspects.

  16. Computer Assisted Language Learning. Routledge Studies in Computer Assisted Language Learning

    Science.gov (United States)

    Pennington, Martha

    2011-01-01

    Computer-assisted language learning (CALL) is an approach to language teaching and learning in which computer technology is used as an aid to the presentation, reinforcement and assessment of material to be learned, usually including a substantial interactive element. This books provides an up-to date and comprehensive overview of…

  17. Computer-Assisted Exposure Treatment for Flight Phobia

    Science.gov (United States)

    Tortella-Feliu, Miguel; Bornas, Xavier; Llabres, Jordi

    2008-01-01

    This review introduces the state of the art in computer-assisted treatment for behavioural disorders. The core of the paper is devoted to describe one of these interventions providing computer-assisted exposure for flight phobia treatment, the Computer-Assisted Fear of Flying Treatment (CAFFT). The rationale, contents and structure of the CAFFT…

  18. Computer Assisted Diagnoses for Red Eye (CADRE

    Directory of Open Access Journals (Sweden)

    Muhammad Zubair Asghar

    2009-11-01

    Full Text Available This paper introduces an expert System (ES named as “CADRE-Computer Assisted Diagnoses for Red Eye. Mostly the remote areas of the population are deprived of the facilities of having experts in eye disease. So it is the need of the day to store the expertise of Eye specialists in computers through using ES technology. This ES is a rule-based Expert System that assists in red-eye diagnosis and treatment. The knowledge acquired from literature review and human experts of the specific domain was used as a base for analysis, diagnosis and recommendations. CADRE evaluates the risk factors of 20 eye diseases and works just like an ophthalmologist, which will be useful for students, doctors and researchers as well as to patients. This expert system (ES was developed through using ESTA, VISUAL BASIC, MS-EXCEL, Seagate Crystal Reports and Image Styler. This ES is not limited to the Red-eye diseases but can be extended to all types of eye-diseases.

  19. Behavior computing modeling, analysis, mining and decision

    CERN Document Server

    2012-01-01

    Includes six case studies on behavior applications Presents new techniques for capturing behavior characteristics in social media First dedicated source of references for the theory and applications of behavior informatics and behavior computing

  20. Medical Image Computing and Computer-Assisted Intervention - MICCAI 2006

    DEFF Research Database (Denmark)

    Nielsen, Mads; Sporring, Jon

    The two-volume set LNCS 4190 and LNCS 4191 constitute the refereed proceedings of the 9th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2006, held in Copenhagen, Denmark in October 2006. The program committee carefully selected 39 revised full papers...... and 193 revised poster papers from 578 submissions for presentation in two volumes, based on a rigorous peer reviews. The first volume includes 114 contributions related to bone shape analysis, robotics and tracking, segmentation, analysis of diffusion tensor MRI, shape analysis and morphometry......, simulation and interaction, robotics and intervention, cardio-vascular applications, image analysis in oncology, brain atlases and segmentation, cardiac motion analysis, clinical applications, and registration. The second volume collects 118 papers related to segmentation, validation and quantitative image...

  1. Offering Behavioral Assistance to Latino Students Demonstrating Challenging Behaviors

    Directory of Open Access Journals (Sweden)

    Gerardo Moreno

    2015-11-01

    Full Text Available Challenging behaviors can significantly alter the learning environment of any classroom. Traditionally, schools have implemented practices that remove the offending student from the classroom, deliver punitive disciplinary actions, or refer the student to special education evaluation. Unfortunately, such practices have demonstrated little longitudinal effectiveness, with detrimental outcomes for the referred student, particularly students from Latino backgrounds. With enrollment projections indicating Latinos will become the majority in U.S. schools, educators are presented with the opportunity to shift away from past practices and implement evidence-based practices that concurrently assist students while addressing challenging behaviors. In this paper, the authors discuss past disciplinary practices, the adverse effects on Latino students, and offer recommendations on implementing functional behavioral assessment as a means to better meet the needs of Latino students demonstrating challenging behaviors.

  2. Computer-assisted access to the kidney

    CERN Document Server

    Mozer, P; Payan, Yohan; Troccaz, J; Chartier-Kastler, E; Richard, F

    2005-01-01

    OBJECTIVES: The aim of this paper is to introduce the principles of computer-assisted access to the kidney. The system provides the surgeon with a pre-operative 3D planning on computed tomography (CT) images. After a rigid registration with space-localized ultrasound (US) data, preoperative planning can be transferred to the intra-operative conditions and an intuitive man-machine interface allows the user to perform a puncture. MATERIAL AND METHODS: Both CT and US images of informed normal volunteer were obtained to perform calculation on the accuracy of registration and punctures were carried out on a kidney phantom to measure the precision of the whole of the system. RESULTS: We carried out millimetric registrations on real data and guidance experiments on a kidney phantom showed encouraging results of 4.7 mm between planned and reached targets. We noticed that the most significant error was related to the needle deflection during the puncture. CONCLUSION: Preliminary results are encouraging. Further work w...

  3. Computer-assisted design/computer-assisted manufacturing systems: A revolution in restorative dentistry.

    Science.gov (United States)

    Sajjad, Arbaz

    2016-01-01

    For the better part of the past 20 years, dentistry has seen the development of many new all-ceramic materials and restorative techniques fueled by the desire to capture the ever elusive esthetic perfection. This has resulted in the fusion of the latest in material science and the pen ultimate in computer-assisted design/computer-assisted manufacturing (CAD/CAM) technology. This case report describes the procedure for restoring the esthetic appearance of both the left and right maxillary peg-shaped lateral incisors with a metal-free sintered finely structured feldspar ceramic material using the latest laboratory CAD/CAM system. The use of CAD/CAM technology makes it possible to produce restorations faster with precision- fit and good esthetics overcoming the errors associated with traditional ceramo-metal technology. The incorporation of this treatment modality would mean that the dentist working procedures will have to be adapted in the methods of CAD/CAM technology.

  4. CARS 2008: Computer Assisted Radiology and Surgery. Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-06-15

    The proceedings contain contributions to the following topics: digital imaging, computed tomography, magnetic resonance, cardiac and vascular imaging, computer assisted radiation therapy, image processing and display, minimal invasive spinal surgery, computer assisted treatment of the prostate, the interventional radiology suite of the future, interventional oncology, computer assisted neurosurgery, computer assisted head and neck and ENT surgery, cardiovascular surgery, computer assisted orthopedic surgery, image processing and visualization, surgical robotics, instrumentation and navigation, surgical modelling, simulation and education, endoscopy and related techniques, workflow and new concepts in surgery, research training group 1126: intelligent surgery, digital operating room, image distribution and integration strategies, regional PACS and telemedicine, PACS - beyond radiology and E-learning, workflow and standardization, breast CAD, thoracic CAD, abdominal CAD, brain CAD, orthodontics, dentofacial orthopedics and airways, imaging and treating temporomandibular joint conditions, maxillofacial cone beam CT, craniomaxillofacial image fusion and CBCT incidental findings, image guided craniomaxillofacial procedures, imaging as a biomarker for therapy response, computer aided diagnosis. The Poster sessions cover the topics computer aided surgery, Euro PACS meeting, computer assisted radiology, computer aided diagnosis and computer assisted radiology and surgery.

  5. On advantages and limitations of computer-assisted language learning

    Institute of Scientific and Technical Information of China (English)

    刘玲

    2008-01-01

    Computer-assisted language learning(CALL)is used increasingly in foreign language teaching.Compared with the traditional teaching method,computer-assisted language learning has unparallel advantages,but in fact it does have some limitations in some aspects.

  6. Computer-Assisted Linguistic Analysis of the Peshitta

    NARCIS (Netherlands)

    Roorda, D.; Talstra, Eep; Dyk, Janet; van Keulen, Percy; Sikkel, Constantijn; Bosman, H.J.; Jenner, K.D.; Bakker, Dirk; Volkmer, J.A.; Gutman, Ariel; van Peursen, Wido Th.

    2014-01-01

    CALAP (Computer-Assisted Linguistic Analysis of the Peshitta), a joint research project of the Peshitta Institute Leiden and the Werkgroep Informatica at the Vrije Universiteit Amsterdam (1999-2005) CALAP concerned the computer-assisted analysis of the Peshitta to Kings (Janet Dyk and Percy van Keul

  7. [Computer-assisted 3D phonetography].

    Science.gov (United States)

    Neuschaefer-Rube, C; Klajman, S

    1996-10-01

    Profiles of fundamental frequency sound pressure levels and voice duration are measured separately in clinical practice. It was the aim of the present study to combine the two examinations, in order to estimate the relationship between pitch, sound pressure level and voice duration and to develop a new computer-assisted graph. A three-dimensional (3D) wireframe phonogram was constructed based on SPL profiles to obtain a general view of the parameters recorded. We have termed this "phonetography". Variable further projections were selected for the analysis of different aspects of parametric relationships. The results in 21 healthy volunteers and 4 patients with hyperfunctional dysphonias demonstrated that there were three typical figures of the 3D phonograms produced, depending on the relationship between voice duration when soft ("piano") compared to loud ("forte"). In one-third of the healthy volunteers, the values of the piano voice duration were greater than those of forte for almost all pitches examined. In two-thirds of the healthy subjects the values of forte voice duration were partly greater, as were those of piano voice duration. All of the patients showed voice duration values greater for forte than for piano. The results of the study demonstrate that the 3D phonogram is a useful tool for obtaining new insights into various relationships of voice parameters.

  8. Recent developments in computer assisted rehabilitation environments

    Institute of Scientific and Technical Information of China (English)

    Rob van der Meer

    2014-01-01

    Computer Assisted Rehabilitation Environment (CAREN) is a system that integrates a training platform (motion base), a virtual environment, a sensor system (motion capture) and D-flow software. It is useful for both diagnostic and therapeutic use. The human gait pattern can be impaired due to disease, trauma or natural decline. Gait analysis is a useful tool to identify impaired gait patterns. Traditional gait analysis is a very time consuming process and therefore only used in exceptional cases. With new systems a quick and extensive analysis is possible and provides useful tools for therapeutic purposes. The range of systems will be described in this paper, highlighting both their diagnostic use and the therapeutic possibilities. Because wounded warriors often have an impaired gait due to amputations or other extremity trauma, these systems are very useful for military rehabilitative efforts. Additionally, the virtual reality environment creates a very challenging situation for the patient, enhancing their rehabilitation experience. For that reason several Armed Forces have these systems already in use. The most recent experiences will be discussed; including new developments both in the extension of the range of systems and the improvement and adaptation of the software. A new and promising development, the use of CAREN in a special application for patients with post-traumatic stress disorder (PTSD), will also be reviewed.

  9. Computer vision for driver assistance systems

    Science.gov (United States)

    Handmann, Uwe; Kalinke, Thomas; Tzomakas, Christos; Werner, Martin; von Seelen, Werner

    1998-07-01

    Systems for automated image analysis are useful for a variety of tasks and their importance is still increasing due to technological advances and an increase of social acceptance. Especially in the field of driver assistance systems the progress in science has reached a level of high performance. Fully or partly autonomously guided vehicles, particularly for road-based traffic, pose high demands on the development of reliable algorithms due to the conditions imposed by natural environments. At the Institut fur Neuroinformatik, methods for analyzing driving relevant scenes by computer vision are developed in cooperation with several partners from the automobile industry. We introduce a system which extracts the important information from an image taken by a CCD camera installed at the rear view mirror in a car. The approach consists of a sequential and a parallel sensor and information processing. Three main tasks namely the initial segmentation (object detection), the object tracking and the object classification are realized by integration in the sequential branch and by fusion in the parallel branch. The main gain of this approach is given by the integrative coupling of different algorithms providing partly redundant information.

  10. Computer assistance in clinical functional analysis.

    Science.gov (United States)

    Ahlers, M O; Jakstat, H A

    2002-10-01

    The use of computers in the dental practice has been primarily restricted to the acquisition of billing data. Additional possibilities for use of PCs exist in diagnostic data acquisition and evaluation; clinical functional analysis seems a particularly suitable application. Such software is now available: CMDfact. Dentally, it is based on a previously developed and published examination and documentation system, the graphic user interface of which is used in the newly developed software. After the examination data have been acquired by mouse click or numerical entry, these are available for evaluation. A special function, the "Diagnosis pilot" is integrated to support the user. This helps in the assignment of the appropriate "Initial diagnoses", since it brings together the individually existing principal symptoms and suitable diagnoses for the initial diagnosis in question and also states which diagnoses "would be appropriate" for this, but are not available. With 3D animation, the software also helps the dentist to explain aspects of CMD to patients. The software also assists the dentist with a detailed multimedia help system, which provides context-sensitive help for every examination step. These help functions explain the sense of the relevant examinations, their performance and evaluation in the form of short texts and explanatory photographs and videos.

  11. Behavioral Biometrics in Assisted Living: A Methodology for Emotion Recognition

    Directory of Open Access Journals (Sweden)

    S. Xefteris

    2016-08-01

    Full Text Available Behavioral biometrics aim at providing algorithms for the automatic recognition of individual behavioral traits, stemming from a person’s actions, attitude, expressions and conduct. In the field of ambient assisted living, behavioral biometrics find an important niche. Individuals suffering from the early stages of neurodegenerative diseases (MCI, Alzheimer’s, dementia need supervision in their daily activities. In this context, an unobtrusive system to monitor subjects and alert formal and informal carers providing information on both physical and emotional status is of great importance and positively affects multiple stakeholders. The primary aim of this paper is to describe a methodology for recognizing the emotional status of a subject using facial expressions and to identify its uses, in conjunction with pre-existing risk-assessment methodologies, for its integration into the context of a smart monitoring system for subjects suffering from neurodegenerative diseases. Paul Ekman’s research provided the background on the universality of facial expressions as indicators of underlying emotions. The methodology then makes use of computational geometry, image processing and graph theory algorithms for the detection of regions of interest and then a neural network is used for the final classification. Findings are coupled with previous published work for risk assessment and alert generation in the context of an ambient assisted living environment based on Service oriented architecture principles, aimed at remote web-based estimation of the cognitive and physical status of MCI and dementia patients.

  12. Dental outcomes in computer-assisted orthognathic surgery.

    Science.gov (United States)

    Hamilton, Travis; Markiewicz, Michael R; Jarman, Joseph; Bell, R Bryan

    2012-05-01

    The purpose of this study was to assess the effectiveness of computer-aided orthognathic surgery in reducing incisal overjet and establishing class I occlusion in subjects with dentofacial deformities. To address the research purpose, the investigators initiated a retrospective cohort study and enrolled a sample of subjects who underwent computer-assisted orthognathic surgery for dentofacial deformities. Two examiners assessed preoperative and postoperative lateral cephalometric radiographs for change in overjet after computer-assisted orthognathic surgery. Preoperative and postoperative occlusal photographs were then reviewed to assess for establishment of class I occlusion after computer-assisted orthognathic surgery. Cohen κ coefficient was used to assess for interrater agreement. A matched-pairs t-test was used to assess reduction in incisal overjet after computer-assisted orthognathic surgery. The sample was composed of 9 subjects who underwent computer-assisted surgery for dentofacial deformities. There was good interrater consistency for preoperative measurement of overjet (κ = 0.7, P ≤ 0.001). There was fair interrater consistency for postoperative measurement of overjet (κ = 0.4, P = 0 .02). Both examiners agreed on preoperative and postoperative assessments of occlusal photographs. There was a 3.4-mm reduction in incisal overjet after computer-assisted orthognathic surgery (P ≤ 0.001). Mean postoperative absolute overjet was 1.3 mm. In subjects with dentofacial deformities, computer-aided orthognathic surgery was effective in reducing incisal overjet and establishing class I occlusion.

  13. Computer-assisted Elementary Chinese Learning for American Students

    Science.gov (United States)

    Hong-yan, Zhang

    2007-01-01

    Despite hopes and claims about benefits of computer-assisted language learning, few studies have documented actual cases about how American students learn elementary Chinese in a computer-equipped classroom. This paper deals with how to use computer as an educational tool to develop American students' Chinese language skills. The theoretical…

  14. Center for Advanced Energy Studies: Computer Assisted Virtual Environment (CAVE)

    Data.gov (United States)

    Federal Laboratory Consortium — The laboratory contains a four-walled 3D computer assisted virtual environment - or CAVE TM — that allows scientists and engineers to literally walk into their data...

  15. Ethics and Computer-Assisted Assessment: Three Case Studies.

    Science.gov (United States)

    Jacob, Susan; Brantley, John C.

    1989-01-01

    Three ethical-legal case incidents involving computer-assisted psychodiagnostic assessment in the schools are presented. Each case is analyzed in terms of applicable laws, ethical codes, and standards for professional practice. (Author)

  16. Social Computing: The Impact on Cultural Behavior

    Directory of Open Access Journals (Sweden)

    Naif Ali Almudawi

    2016-07-01

    Full Text Available Social computing continues to become more and more popular and has impacted cultural behavior. While cultural behavior affects the way an individual do social computing, Hofstede’s theory is still prevalent. The results of this literature review suggest that, at least for several cultural dimensions, some adjustments may be required to reflect current time and the recognition of the role of technology nowadays. Thus, today, social computing has evolved into continuous communication and interaction of many culturally diverse users.

  17. Effects of Computer-Assisted Instruction on Students' Knowledge of Postschool Options

    Science.gov (United States)

    Mazzotti, Valerie L.; Test, David W.; Wood, Charles L.; Richter, Sharon

    2010-01-01

    Enhancing students' ability to make informed choices is an important precursor to successful choice-making, decision-making, and goal-setting. This study used a multiple-baseline design across behaviors replicated across participants to examine the effects of computer-assisted instruction on acquisition of students' knowledge of postschool options…

  18. Computer Assisted Instruction (CAI) in Language Teaching

    Institute of Scientific and Technical Information of China (English)

    Xin; Jing

    2015-01-01

    There are many ways to use computers for English language teaching.First of all,teachers can use them to prepare for classes.They can use a word processing program to write teaching materials and tests.They can use dictionaries,encyclopedias,et c.,available on the computer as resources to help them prepare

  19. Teaching Reading through Computer-Assisted Language Learning

    Science.gov (United States)

    Bhatti, Tariq Muhammad

    2013-01-01

    To study the role of reading in secondary schools and how it may be improved through computers, a year-long study was conducted to examine which of two methods of teaching reading skills, an instructor-led class vs. computer-assisted language learning (CALL), aided secondary students in improving the literal, inferential, and evaluative levels of…

  20. Computer-Assisted Accent Modification: A Report on Practice Effects.

    Science.gov (United States)

    Ferrier, Linda J.; Reid, Lawry N.; Chenausky, Karen

    1999-01-01

    This study evaluated the use of the computer-assisted accent-modification program, Speech Works, with beginning college students of English as a second language with a non-speech-language pathologist trainer. Students who had weekly one-on-one sessions with a teacher and independent practice, especially when the practice was computer monitored,…

  1. Computer-Assisted Intervention for Children with Low Numeracy Skills

    Science.gov (United States)

    Rasanen, Pekka; Salminen, Jonna; Wilson, Anna J.; Aunio, Pirjo; Dehaene, Stanislas

    2009-01-01

    We present results of a computer-assisted intervention (CAI) study on number skills in kindergarten children. Children with low numeracy skill (n = 30) were randomly allocated to two treatment groups. The first group played a computer game (The Number Race) which emphasized numerical comparison and was designed to train number sense, while the…

  2. Computer Assisted Introduction to Mathematical Induction.

    Science.gov (United States)

    Blubaugh, William L.

    1993-01-01

    Describes examples of student-centered activities for exploring mathematical induction using BASIC programs or spreadsheets. Discusses the advantages of using this medium to teach the concept and provides computer programs for the activities. (MDH)

  3. Effects of computer-assisted oral anticoagulant therapy

    DEFF Research Database (Denmark)

    Rasmussen, Rune Skovgaard; Corell, Pernille; Madsen, Poul

    2012-01-01

    UNLABELLED: BACKGROUND: Computer-assistance and self-monitoring lower the cost and may improve the quality of anticoagulation therapy. The main purpose of this clinical investigation was to use computer-assisted oral anticoagulant therapy to improve the time to reach and the time spent within...... in a computer system by an algorithm specific to each group. The third group received traditional anticoagulation treatment by physicians. The obtained INR values were compared regarding the time to reach, and the time spent within, the therapeutic target range, corresponding to INR values from 2 to 3. RESULTS......: Patients randomized to computer-assisted anticoagulation and the CoaguChek® system reached the therapeutic target range after 8 days compared to 14 days by prescriptions from physicians (p = 0.04). Time spent in the therapeutic target range did not differ between groups. The median INR value measured...

  4. [The history and development of computer assisted orthopaedic surgery].

    Science.gov (United States)

    Jenny, J-Y

    2006-10-01

    Computer assisted orthopaedic surgery (CAOS) was developed to improve the accuracy of surgical procedures. It has improved dramatically over the last years, being transformed from an experimental, laboratory procedure into a routine procedure theoretically available to every orthopaedic surgeon. The first field of application of computer assistance was neurosurgery. After the application of computer guided spinal surgery, the navigation of total hip and knee joints became available. Currently, several applications for computer assisted surgery are available. At the beginning of navigation, a preoperative CT-scan or several fluoroscopic images were necessary. The imageless systems allow the surgeon to digitize patient anatomy at the beginning of surgery without any preoperative imaging. The future of CAOS remains unknown, but there is no doubt that its importance will grow in the next 10 years, and that this technology will probably modify the conventional practice of orthopaedic surgery.

  5. Behavioral Economics, Food Assistance, and Obesity

    OpenAIRE

    David R Just

    2006-01-01

    While there is mixed evidence of the impact of food assistance programs on obesity, there is general agreement that the food-insecure are at higher risk of obesity and obesity-related diseases. Food assistance programs, originally designed to overcome a lack of available food, now need to confront a very different problem: how to provide for the food-insecure while encouraging healthy lifestyles. This paper examines the potential to address these competing needs using traditional economic pol...

  6. Terrace Layout Using a Computer Assisted System

    Science.gov (United States)

    Development of a web-based terrace design tool based on the MOTERR program is presented, along with representative layouts for conventional and parallel terrace systems. Using digital elevation maps and geographic information systems (GIS), this tool utilizes personal computers to rapidly construct ...

  7. Computer- and robot-assisted urological surgery

    CERN Document Server

    Troccaz, Jocelyne

    2006-01-01

    The author reviews the computer and robotic tools available to urologists to help in diagnosis and technical procedures. The first part concerns the contribution of robotics and presents several systems at various stages of development (laboratory prototypes, systems under validation or marketed systems). The second part describes image fusion tools and navigation systems currently under development or evaluation. Several studies on computerized simulation of urological procedures are also presented.

  8. Computer-assisted design of organic synthesis

    Science.gov (United States)

    Kaminaka, H.

    1986-01-01

    The computer programs to design synthetic pathways of organic compounds have been utilized throughout the world since the first system was reported by Corey in 1969, and the LHASA was reported in1972 to become the predominant system. Many programs have been reported mainly in the United States and Europe, and groups of corporations, especially chemical companies, have been trying to improve programs and increase the efficiency of research. In Japan, unfortunately, no concrete movement in this area has been seen. Of course, it goes without saying that these kinds of programs are effective for efficient research, but the remarkable aspect is that these can present unexpected data to the researchers to stimulate them to develop new ideas.

  9. Safety of computer-assisted surgery for cannulated hip screws

    NARCIS (Netherlands)

    Hamelinck, H.K.M; Haagmans, M.; Snoeren, M.M.; Biert, J.; Vugt, A.B. van; Frolke, J.P.M.

    2007-01-01

    Computer-assisted orthopaedic surgery has developed considerably during the past few years. Several manufacturers produce hardware and software for use in trauma surgery. Validation of these systems before clinical application is mandatory to be sure they work accurately and safely. The accuracy of

  10. COMPUTER-ASSISTED TRANSLATION RISKS AND THREATS IN LEGAL TEXTS

    Directory of Open Access Journals (Sweden)

    Georgiana, MÎNDRECI

    2014-11-01

    Full Text Available In a world in which IT is developing faster than ever, providing reliable solutions to all problems, regardless the field of interest, the issue of computer-assisted translation systems is more and more complex, offering both advantages and disadvantages. The field of translating legal texts from Romanian into English is deprived of a large number of specialists and this is one of the main reasons why more and more people resort to computer-assisted translations, especially Google translations when dealing with translating various texts (from Romanian into English or vice-versa, in this particular case legal texts. Yet, although this field has immensely thrived recently, and is quite reliable for simple and very easy translations, the average English speaker runs huge risks of falling into traps that can lead to errors and misinterpretations. Thus, this article aims to identify the main theoretical approaches to computer-assisted theories and the major risks and threats that occur in this type of translation, focusing particularly on legal texts. There are important differences, not only of words, but also differences in the legal systems themselves, both theoretical and practical ones, which must be correctly dealt with -something which computer-assisted translation cannot do (yet.

  11. Optimizing Computer Assisted Instruction By Applying Principles of Learning Theory.

    Science.gov (United States)

    Edwards, Thomas O.

    The development of learning theory and its application to computer-assisted instruction (CAI) are described. Among the early theoretical constructs thought to be important are E. L. Thorndike's concept of learning connectisms, Neal Miller's theory of motivation, and B. F. Skinner's theory of operant conditioning. Early devices incorporating those…

  12. Integrating Computer-Assisted Translation Tools into Language Learning

    Science.gov (United States)

    Fernández-Parra, María

    2016-01-01

    Although Computer-Assisted Translation (CAT) tools play an important role in the curriculum in many university translator training programmes, they are seldom used in the context of learning a language, as a good command of a language is needed before starting to translate. Since many institutions often have translator-training programmes as well…

  13. Social Choice in a Computer-Assisted Simulation

    Science.gov (United States)

    Thavikulwat, Precha

    2009-01-01

    Pursuing a line of inquiry suggested by Crookall, Martin, Saunders, and Coote, the author applied, within the framework of design science, an optimal-design approach to incorporate into a computer-assisted simulation two innovative social choice processes: the multiple period double auction and continuous voting. Expectations that the…

  14. COMPUTER ASSISTED INSTRUCTION AND ITS APPLICATION IN ENGLISH LEARNING

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    This paper briefly describes the development of computer assisted instruction(CAI) abroad and in China, lists the advantages of CAI and deals with its application in English learning. Some suggestions about how to make better use of CAI in ELT are also given.

  15. Computer Assisted Instruction. A Report to the Board.

    Science.gov (United States)

    Stoneberg, Bert, Jr.

    This report presents the findings of an evaluation conducted in the Greater Albany Public School System 8J (Oregon) to determine the effects of computer assisted instruction (CAI) in mathematics as delivered by the WICAT System 300 at the Periwinkle Elementary School. Evaluation activities were designed and conducted to determine whether the…

  16. The Effectiveness of a Computer-Assisted Math Learning Program

    Science.gov (United States)

    De Witte, K.; Haelermans, C.; Rogge, N.

    2015-01-01

    Computer-assisted instruction (CAI) programs are considered as a way to improve learning outcomes of students. However, little is known on the schools who implement such programs as well as on the effectiveness of similar information and communication technology programs. We provide a literature review that pays special attention to the existing…

  17. Client Anticipations about Computer-Assisted Career Guidance System Outcomes.

    Science.gov (United States)

    Osborn, Debra S.; Peterson, Gary W.; Sampson, James P., Jr.; Reardon, Robert C.

    2003-01-01

    This study describes how 55 clients from a career center at a large, southeastern university anticipated using computer-assisted career guidance (CACG) systems to help in their career decision making and problem solving. Responses to a cued and a free response survey indicated that clients' most frequent anticipations included increased career…

  18. A New Approach: Computer-Assisted Problem-Solving Systems

    Science.gov (United States)

    Gok, Tolga

    2010-01-01

    Computer-assisted problem solving systems are rapidly growing in educational use and with the advent of the Internet. These systems allow students to do their homework and solve problems online with the help of programs like Blackboard, WebAssign and LON-CAPA program etc. There are benefits and drawbacks of these systems. In this study, the…

  19. Computer Assisted Drafting (CNC) Drawings. Drafting Module 6. Instructor's Guide.

    Science.gov (United States)

    Missouri Univ., Columbia. Instructional Materials Lab.

    This Missouri Vocational Instruction Management System instructor's drafting guide has been keyed to the drafting competency profile developed by state industry and education professionals. This unit contains information on computer-assisted drafting drawings. The guide contains a cross-reference table of instructional materials and 20 worksheets.…

  20. Computer-Assisted Foreign Language Teaching and Learning: Technological Advances

    Science.gov (United States)

    Zou, Bin; Xing, Minjie; Wang, Yuping; Sun, Mingyu; Xiang, Catherine H.

    2013-01-01

    Computer-Assisted Foreign Language Teaching and Learning: Technological Advances highlights new research and an original framework that brings together foreign language teaching, experiments and testing practices that utilize the most recent and widely used e-learning resources. This comprehensive collection of research will offer linguistic…

  1. Computer-Assisted Periodical Routing and Renewal Audit

    Science.gov (United States)

    Yerkey, A. Neil

    1973-01-01

    A computer-assisted periodical control system was designed to reduce clerical time required to maintain records in three areas: renewal audit, routing, and records-keeping. The renewal audit features are unusual and are described in detail. (3 references) (Author/DH)

  2. Computer-Assisted Technology for the Twice Exceptional

    Science.gov (United States)

    Rizza, Mary

    2006-01-01

    Technology helps students develop coping strategies to deal with various learning differences. Assistive technology is a common intervention provided to students with disabilities and generally varies depending on student need. Within gifted education, the use of computers and technology is concentrated on curricular applications and activities…

  3. User Interface Improvements in Computer-Assisted Instruction, the Challenge.

    Science.gov (United States)

    Chalmers, P. A.

    2000-01-01

    Identifies user interface problems as they relate to computer-assisted instruction (CAI); reviews the learning theories and instructional theories related to CAI user interface; and presents potential CAI user interface improvements for research and development based on learning and instructional theory. Focuses on screen design improvements.…

  4. Ethical and Professional Issues in Computer-Assisted Therapy.

    Science.gov (United States)

    Ford, B. Douglas

    1993-01-01

    Discusses ethical and professional issues in psychology regarding computer-assisted therapy (CAT). Topics addressed include an explanation of CAT; whether CAT is psychotherapy; software, including independent use, validation of effectiveness, and restricted access; clinician resistance; client acceptance; the impact on ethical standards; and a…

  5. Computer-Assisted Learning in British Sign Language

    Science.gov (United States)

    Mertzani, Maria

    2011-01-01

    The fact that language teaching can be operationalized through computer-assisted language learning (CALL) has directed researchers' attention to the learning task, which, in this case, is considered to be the unit that demands analysis of the communicative processes in which the learner is involved while working with CALL. Research focuses on…

  6. Computer-assisted glucose control in critically ill patients

    NARCIS (Netherlands)

    Vogelzang, Mathijs; Loef, Bert G.; Regtien, Joost G.; van der Horst, Iwan C. C.; van Assen, Hein; Zijlstra, Felix; Nijsten, Maarten W. N.

    2008-01-01

    Objective: Intensive insulin therapy is associated with the risk of hypoglycemia and increased costs of material and personnel. We therefore evaluated the safety and efficiency of a computer-assisted glucose control protocol in a large population of critically ill patients. Design and setting: Obser

  7. Computer-Assisted Dieting: Effects of a Randomized Nutrition Intervention

    Science.gov (United States)

    Schroder, Kerstin E. E.

    2011-01-01

    Objectives: To compare the effects of a computer-assisted dieting intervention (CAD) with and without self-management training on dieting among 55 overweight and obese adults. Methods: Random assignment to a single-session nutrition intervention (CAD-only) or a combined CAD plus self-management group intervention (CADG). Dependent variables were…

  8. Enhancing Computer Assisted Assessment Using Rubrics in a QTI Editor

    NARCIS (Netherlands)

    Santos, Patricia; Colina, Xavier; Hernández-Leo, Davinia; Melero, Javier; Blat, Josep

    2009-01-01

    Santos,P., Colina, X., Hernández-Leo, D., Melero, J., & Blat, J. (accepted). Enhancing Computer Assisted Assessment Using Rubrics in a QTI Editor. The 9th IEEE International Conference on Advanced Learning Technologies. July, 14-18, 2009, Riga, Latvia.

  9. Collaboration and Computer-Assisted Acquisition of a Second Language.

    Science.gov (United States)

    Renie, Delphine; Chanier, Thierry

    1995-01-01

    Discusses how collaborative learning (CL) can be used in a computer-assisted learning (CAL) environment for language learning, reviewing research in the fields of applied linguistics, educational psychology, and artificial intelligence. An application of CL and CAL in the learning of French as a Second Language, focusing on interrogative…

  10. Computer-Assisted Law Instruction: Clinical Education's Bionic Sibling

    Science.gov (United States)

    Henn, Harry G.; Platt, Robert C.

    1977-01-01

    Computer-assisted instruction (CAI), like clinical education, has considerable potential for legal training. As an initial Cornell Law School experiment, a lesson in applying different corporate statutory dividend formulations, with a cross-section of balance sheets and other financial data, was used to supplement regular class assignments.…

  11. Computer-assisted venous thrombosis volume quantification.

    Science.gov (United States)

    Puentes, John; Dhibi, Mounir; Bressollette, Luc; Guias, Bruno; Solaiman, Basel

    2009-03-01

    Venous thrombosis (VT) volume assessment, by verifying its risk of progression when anticoagulant or thrombolytic therapies are prescribed, is often necessary to screen life-threatening complications. Commonly, VT volume estimation is done by manual delineation of few contours in the ultrasound (US) image sequence, assuming that the VT has a regular shape and constant radius, thus producing significant errors. This paper presents and evaluates a comprehensive functional approach based on the combination of robust anisotropic diffusion and deformable contours to calculate VT volume in a more accurate manner when applied to freehand 2-D US image sequences. Robust anisotropic filtering reduces image speckle noise without generating incoherent edge discontinuities. Prior knowledge of the VT shape allows initializing the deformable contour, which is then guided by the noise-filtering outcome. Segmented contours are subsequently used to calculate VT volume. The proposed approach is integrated into a system prototype compatible with existing clinical US machines that additionally tracks the acquired images 3-D position and provides a dense Delaunay triangulation required for volume calculation. A predefined robust anisotropic diffusion and deformable contour parameter set enhances the system usability. Experimental results pertinence is assessed by comparison with manual and tetrahedron-based volume computations, using images acquired by two medical experts of eight plastic phantoms and eight in vitro VTs, whose independently measured volume is the reference ground truth. Results show a mean difference between 16 and 35 mm(3) for volumes that vary from 655 to 2826 mm(3). Two in vivo VT volumes are also calculated to illustrate how this approach could be applied in clinical conditions when the real value is unknown. Comparative results for the two experts differ from 1.2% to 10.08% of the smallest estimated value when the image acquisition cadences are similar.

  12. Computer-assisted Diagnostic Checklist in Clinical Neurology.

    Science.gov (United States)

    Finelli, Pasquale F; McCabe, Andrew L

    2016-03-01

    Considering computers are more efficient at processing large amounts of information than the human brain, speaks to the need to explore more intelligent computer-assisted diagnostic approaches. Two diagnostic checklist programs, one for single key term entry (NeurologyINDEX), and another, with more advanced algorithms to process multiple key terms and perform additional functions (NeurologicDx) are discussed. Both programs are internet based, access the same database, and are designed to generate diagnostic checklists and disease profiles accessible with hand-held or other computer device. The development of systems that use "smart algorithms" to generate valid diagnostic checklists is the goal.

  13. Computer assisted orthopaedic surgery: present status and future perspectives

    Institute of Scientific and Technical Information of China (English)

    Kwok Sui Leung

    2010-01-01

    @@ The principle of navigation surgery was first adopted in neurosurgery where a mechanical rigid frame was used in the stereotactic surgery to locate a deep ganglia and tract in the brain by Clark and Horsley1 in 1906. The planning was based on anatomical atlas of the brain and was not patient specific. The navigation procedure was possible with a rigid mechanical frame to define the trajectory with a rigid instrument holder on a rigid fixation of the operating structure, i.e. the skull. With the advancements in 3-D medical imaging, i.e. CT in 1971,MR imaging in 1973, general stereotaxis was possible and became specific to anatomy of each individual patient.Together with the advancement of computer technology:VAX in 1976, Apple in 1977, IBM personal computer in 1981, computer assisted stereotaxis was possible and in 1985, the term computer assisted surgery (CAS) was proposed by Sohn and Robins.2 With further development of 3-D tracking by NDI with Optotrak 1990, computer assisted orthopaedic surgery (CAOS) developed and gradually became widely applicable in clinical practice.

  14. A review of computer assisted learning in medical undergraduates

    Directory of Open Access Journals (Sweden)

    Lisha J John

    2013-01-01

    Full Text Available Laboratory based practical classes, have been the corner stone of undergraduate pharmacology learning. Ethical issues with the use of animals and rapid development of information technology has led to newer trends in teaching and learning such as computer assisted learning. Computer assisted learning (CAL software includes computer based packages, focusing on interactive instruction in a specific subject area, collection of animal experiments that encourage students to understand concepts in pharmacology. CAL offers a number of advantages to both students and teachers; most important being meeting the learning objectives. Few disadvantages and pitfalls to implementation in medical schools are also associated with CAL sessions. This article reviews the trend of CAL in pharmacology, advantages, disadvantages and pitfalls to the implementation of CAL.

  15. A review of computer assisted learning in medical undergraduates.

    Science.gov (United States)

    John, Lisha J

    2013-04-01

    Laboratory based practical classes, have been the corner stone of undergraduate pharmacology learning. Ethical issues with the use of animals and rapid development of information technology has led to newer trends in teaching and learning such as computer assisted learning. Computer assisted learning (CAL) software includes computer based packages, focusing on interactive instruction in a specific subject area, collection of animal experiments that encourage students to understand concepts in pharmacology. CAL offers a number of advantages to both students and teachers; most important being meeting the learning objectives. Few disadvantages and pitfalls to implementation in medical schools are also associated with CAL sessions. This article reviews the trend of CAL in pharmacology, advantages, disadvantages and pitfalls to the implementation of CAL.

  16. Errors and Intelligence in Computer-Assisted Language Learning: Parsers and Pedagogues. Routledge Studies in Computer Assisted Language Learning

    Science.gov (United States)

    Heift, Trude; Schulze, Mathias

    2012-01-01

    This book provides the first comprehensive overview of theoretical issues, historical developments and current trends in ICALL (Intelligent Computer-Assisted Language Learning). It assumes a basic familiarity with Second Language Acquisition (SLA) theory and teaching, CALL and linguistics. It is of interest to upper undergraduate and/or graduate…

  17. Computer Assisted Project-Based Instruction: The Effects on Science Achievement, Computer Achievement and Portfolio Assessment

    Science.gov (United States)

    Erdogan, Yavuz; Dede, Dinçer

    2015-01-01

    The purpose of this study is to compare the effects of computer assisted project-based instruction on learners' achievement in a science and technology course, in a computer course and in portfolio development. With this aim in mind, a quasi-experimental design was used and a sample of 70 seventh grade secondary school students from Org. Esref…

  18. Interactive Computer-Assisted Instruction in Acid-Base Physiology for Mobile Computer Platforms

    Science.gov (United States)

    Longmuir, Kenneth J.

    2014-01-01

    In this project, the traditional lecture hall presentation of acid-base physiology in the first-year medical school curriculum was replaced by interactive, computer-assisted instruction designed primarily for the iPad and other mobile computer platforms. Three learning modules were developed, each with ~20 screens of information, on the subjects…

  19. Behavior-Based Assists for Telerobotic Manipulation

    Energy Technology Data Exchange (ETDEWEB)

    Noakes, Mark W [ORNL; Hamel, Dr. William R. [University of Tennessee, Knoxville (UTK)

    2008-01-01

    Teleoperated manipulation has been a critical tool in hazardous operations where the presence of humans has been precluded since the early days of nuclear material handling. Performance levels and limitations were understood and accepted. However, in the current era of decontamination and decommissioning (D&D) of facilities owned by the U.S. Department of Energy, there has been criticism that traditional remote systems are too expensive, too slow, and too difficult to use by cost-driven demolition companies. Previous research in telerobotics has attempted to alleviate some of these issues; however, it has been difficult to get capabilities generated in the research lab into the field. One major difficulty is the severely unstructured environments found in real D&D type environments. Behavior-based robotics (BBR) is based on concepts specifically designed to permit autonomous robots to function in unstructured environments. BBR schemes use sensor data to interact with the world directly rather than to generate models that are manipulated. Because the robot is immersed in its environment and since sensors are mounted on the robot, sensing and motion are inherently calibrated with respect to the robot. This paper presents a behavior-based approach and architecture for executing telerobotic D&D type tooling tasks.

  20. Computer and robotic assisted osteotomy around the knee.

    Science.gov (United States)

    Phillips, R; Hafez, M A; Mohsen, A M; Sherman, K P; Hewitt, J R; Browbank, I; Bouazza-Marouf, K

    2000-01-01

    The outcome variability and failures of conventional osteotomy have been attributed to lack of preoperative planning and inaccuracy in performing the correction. We present a computer and robotic assisted surgery system that can aid in accurate surgical planning for realignment, and in precisely implementing the plan in theatre. The approach seeks to avoid the cost and risks associated with the use of CT, and the insertion of fiducial markers, which are characteristic of existing computer assisted surgical systems. The paper details the architecture of the system as a whole, placing particular emphasis on planning technique. It is anticipated that the increased accuracy possible with the system will prove particularly useful for correcting multi-plane deformities, which are more problematic with conventional techniques.

  1. Soft Tissue Biomechanical Modeling for Computer Assisted Surgery

    CERN Document Server

    2012-01-01

      This volume focuses on the biomechanical modeling of biological tissues in the context of Computer Assisted Surgery (CAS). More specifically, deformable soft tissues are addressed since they are the subject of the most recent developments in this field. The pioneering works on this CAS topic date from the 1980's, with applications in orthopaedics and biomechanical models of bones. More recently, however, biomechanical models of soft tissues have been proposed since most of the human body is made of soft organs that can be deformed by the surgical gesture. Such models are much more complicated to handle since the tissues can be subject to large deformations (non-linear geometrical framework) as well as complex stress/strain relationships (non-linear mechanical framework). Part 1 of the volume presents biomechanical models that have been developed in a CAS context and used during surgery. This is particularly new since most of the soft tissues models already proposed concern Computer Assisted Planning, with ...

  2. Computer-assisted navigation in knee arthroplasty: a critical appraisal.

    Science.gov (United States)

    Venkatesan, Muralidharan; Mahadevan, Devendra; Ashford, Robert U

    2013-10-01

    The purpose of this review was to appraise the use of computer-assisted navigation in total knee arthroplasty and to assess whether this technology has improved clinical outcomes. Studies were identified through searches in MEDLINE, Embase, and PubMed. Numerous studies have shown improved leg and component alignment using navigation systems. However, the better alignment achieved in navigated knee arthroplasty has not been shown to lead to better clinical outcomes. Navigated knee arthroplasty had lower calculated blood loss and lower incidence of fat embolism compared with conventional knee arthroplasty using intramedullary jigs. It may be most valued when dealing with complex knee deformities, revision surgery, or minimally invasive surgery. Navigated knee arthroplasty, however, is only cost-effective in centers with a high volume of joint replacements. Overall, computer-assisted navigated knee arthroplasty provides some advantages over conventional surgery, but its clinical benefits to date are unclear and remain to be defined on a larger scale.

  3. Scalable photonic quantum computation through cavity-assisted interactions.

    Science.gov (United States)

    Duan, L-M; Kimble, H J

    2004-03-26

    We propose a scheme for scalable photonic quantum computation based on cavity-assisted interaction between single-photon pulses. The prototypical quantum controlled phase-flip gate between the single-photon pulses is achieved by successively reflecting them from an optical cavity with a single-trapped atom. Our proposed protocol is shown to be robust to practical noise and experimental imperfections in current cavity-QED setups.

  4. On Modeling the Instructional Content in Computer Assisted Education

    Directory of Open Access Journals (Sweden)

    Emilia PECHEANU

    2009-12-01

    Full Text Available This paper presents a solution for conceptually modeling the instructionalcontent in computer-assisted education. The different cognitive style of learnersimposes different modalities of presenting and structuring the information (thepedagogical knowledge to be taught. Conceptual organization of the training domainknowledge, with learning stages phasing, can constitute a better solution to the problemof adapting the instructional system interaction to users with different cognitive styleand needs.

  5. Is Computer-assisted Distance Learning Possible in Nematology?

    OpenAIRE

    Francl, Leonard J.

    1998-01-01

    In many institutions of higher education, introductory nematology is taught to small numbers of students. Nematology and other low-enrollment courses may be placed under scrutiny, reformatted, or dropped from the curriculum to cut costs and improve faculty efficiency. Computer-assisted distance education (CADE) offers a way to increase faculty productivity and job satisfaction, student learning and socialization, and cost-effectiveness. Participating institutions gain by sharing resources wit...

  6. Computer-assisted patellar resection system: development and insights.

    Science.gov (United States)

    Fu, Chun Kit; Wai, Jeff; Lee, Estee; Hutchison, Carol; Myden, Curtis; Batuyong, Eldridge; Anglin, Carolyn

    2012-04-01

    Incorrect resection of the patella during total knee arthroplasty (TKA) can lead to anterior knee pain (AKP), patellar maltracking, patellofemoral impingement, patellar fracture, component loosening, and reduced range of motion. Computer-assisted surgery (CAS) systems for the tibia and femur improve cut accuracy, but no CAS system is available for patellar resection. We developed a system that included an optoelectronic localizer, marker arrays on the patella and instruments, and navigation software. Three users performed resections on artificial patellae mounted in a simulated surgical setup using five techniques (two CAS, three conventional), each repeated at least three times in randomized order. Computer-assisted patellar resection produced better or equal cut symmetry compared to conventional techniques, particularly superoinferiorly. Using CAS with a sawguide produced better results than using CAS freehand with an oscillating saw. This study showed the feasibility of computer-assisted patellar resection, which could lead to reduced pain and complications after TKA. The feedback provided could also make patellar CAS a valuable training tool.

  7. COMPUTER ASSISTED LOOM IN THE REVIVAL OF CONTEMPORARY MONUMENTAL TAPESTRY

    Directory of Open Access Journals (Sweden)

    PINTILIE Anca-Aurelia

    2015-05-01

    Full Text Available The art of tapestry has its basics back in time, probably in the decorations of tent, the house of the nomad. Tapestry in its beginnings is the first wall of the nomad’s home and the decorative wall and canopy in the ancient Greek houses as architect Gottfried Semper stated in the nineteen century. The architectural approach is not unusual even in the next centuries. Tapestry becomes popular as a form of monumental art during the Middle Ages when it is used as decorative architectural element, coating the walls of medieval castles. During the next centuries dominated by decadent styles of baroque, rococo, the tapestry will lose its monumental spirit and architectural quality but at the middle of the XXth century a new approach will sustain the revival of the tapestry as monumental art. Later, in the XXIst century, renowned multimedia artists will approach this medium and will use computer assisted looms in ambitious tapestry projects. This technique will allow them to realize complex and exquisite tapestries, sustaining in this way the revival of the tapestry in the contemporary art world. The paper presents the importance of the architectural side of tapestry and the great achievement that computer assisted loom represents for this form of art. The research activity is willing to inform Romanian textile designers about the possibilities to create tapestries on computer assisted looms. The research was made during the initial stage of a doctoral thesis consisting in a documentary study on monumental aspects of contemporary tapestry.

  8. Design Principles for Computer-Assisted Instruction in Histology Education: An Exploratory Study

    Science.gov (United States)

    Deniz, Hasan; Cakir, Hasan

    2006-01-01

    The purpose of this paper is to describe the development process and the key components of a computer-assisted histology material. Computer-assisted histology material is designed to supplement traditional histology education in a large Midwestern university. Usability information of the computer-assisted instruction (CAI) material was obtained…

  9. Two-Cloud-Servers-Assisted Secure Outsourcing Multiparty Computation

    Directory of Open Access Journals (Sweden)

    Yi Sun

    2014-01-01

    Full Text Available We focus on how to securely outsource computation task to the cloud and propose a secure outsourcing multiparty computation protocol on lattice-based encrypted data in two-cloud-servers scenario. Our main idea is to transform the outsourced data respectively encrypted by different users’ public keys to the ones that are encrypted by the same two private keys of the two assisted servers so that it is feasible to operate on the transformed ciphertexts to compute an encrypted result following the function to be computed. In order to keep the privacy of the result, the two servers cooperatively produce a custom-made result for each user that is authorized to get the result so that all authorized users can recover the desired result while other unauthorized ones including the two servers cannot. Compared with previous research, our protocol is completely noninteractive between any users, and both of the computation and the communication complexities of each user in our solution are independent of the computing function.

  10. Two-cloud-servers-assisted secure outsourcing multiparty computation.

    Science.gov (United States)

    Sun, Yi; Wen, Qiaoyan; Zhang, Yudong; Zhang, Hua; Jin, Zhengping; Li, Wenmin

    2014-01-01

    We focus on how to securely outsource computation task to the cloud and propose a secure outsourcing multiparty computation protocol on lattice-based encrypted data in two-cloud-servers scenario. Our main idea is to transform the outsourced data respectively encrypted by different users' public keys to the ones that are encrypted by the same two private keys of the two assisted servers so that it is feasible to operate on the transformed ciphertexts to compute an encrypted result following the function to be computed. In order to keep the privacy of the result, the two servers cooperatively produce a custom-made result for each user that is authorized to get the result so that all authorized users can recover the desired result while other unauthorized ones including the two servers cannot. Compared with previous research, our protocol is completely noninteractive between any users, and both of the computation and the communication complexities of each user in our solution are independent of the computing function.

  11. Seventh Medical Image Computing and Computer Assisted Intervention Conference (MICCAI 2012)

    CERN Document Server

    Miller, Karol; Nielsen, Poul; Computational Biomechanics for Medicine : Models, Algorithms and Implementation

    2013-01-01

    One of the greatest challenges for mechanical engineers is to extend the success of computational mechanics to fields outside traditional engineering, in particular to biology, biomedical sciences, and medicine. This book is an opportunity for computational biomechanics specialists to present and exchange opinions on the opportunities of applying their techniques to computer-integrated medicine. Computational Biomechanics for Medicine: Models, Algorithms and Implementation collects the papers from the Seventh Computational Biomechanics for Medicine Workshop held in Nice in conjunction with the Medical Image Computing and Computer Assisted Intervention conference. The topics covered include: medical image analysis, image-guided surgery, surgical simulation, surgical intervention planning, disease prognosis and diagnostics, injury mechanism analysis, implant and prostheses design, and medical robotics.

  12. Computer-Vision-Assisted Palm Rehabilitation With Supervised Learning.

    Science.gov (United States)

    Vamsikrishna, K M; Dogra, Debi Prosad; Desarkar, Maunendra Sankar

    2016-05-01

    Physical rehabilitation supported by the computer-assisted-interface is gaining popularity among health-care fraternity. In this paper, we have proposed a computer-vision-assisted contactless methodology to facilitate palm and finger rehabilitation. Leap motion controller has been interfaced with a computing device to record parameters describing 3-D movements of the palm of a user undergoing rehabilitation. We have proposed an interface using Unity3D development platform. Our interface is capable of analyzing intermediate steps of rehabilitation without the help of an expert, and it can provide online feedback to the user. Isolated gestures are classified using linear discriminant analysis (DA) and support vector machines (SVM). Finally, a set of discrete hidden Markov models (HMM) have been used to classify gesture sequence performed during rehabilitation. Experimental validation using a large number of samples collected from healthy volunteers reveals that DA and SVM perform similarly while applied on isolated gesture recognition. We have compared the results of HMM-based sequence classification with CRF-based techniques. Our results confirm that both HMM and CRF perform quite similarly when tested on gesture sequences. The proposed system can be used for home-based palm or finger rehabilitation in the absence of experts.

  13. Computer-assisted LAD bypass grafting at the open heart

    Science.gov (United States)

    Hartung, Christine; Gnahm, Claudia; Friedl, Reinhard; Hoffmann, Martin; Dietmayer, Klaus

    2009-02-01

    Open heart bypass surgery is the standard treatment in advanced coronary heart diseases. For an effective revascularization procedure, optimal placement of the bypass is very important. To accelerate the intraoperative localization of the anastomosis site and to increase the precision of the procedure, a concept for computer assistance in open heart bypass surgery has been developed comprising the following steps: 1. Preprocedural planning: A patient-specific coronary map with information on vessel paths and wall plaque formations is extracted from a multi-slice computed tomography (MSCT). On this basis, the heart surgeon and the cardiac radiologist define the optimal anastomosis site prior to surgery. 2. Intraoperative navigation: During surgery, data are recorded at the beating heart using a stereo camera system. After registering the pre- and intraoperative data sets, preprocedural information can be transferred to the surgical site by overlaying the coronary map and the planned anastomosis site on the live video stream. With this visual guidance system, the surgeon can navigate to the planned anastomosis site. In this work, the proposed surgical assistance system has been validated for the left anterior descending coronary artery (LAD). The accuracy of the registration mechanism has been evaluated in retrospective on patient data sets and the effects of breathing motion were quantified. The promising results of the retrospective evaluation led to the in-vivo application of the computer assistance system during several bypass grafting procedures. Intraoperative navigation has been performed successfully and postoperative evaluation confirms that the bypass grafts were accurately positioned to the preoperatively planned anastomosis sites.

  14. Computer assisted learning: a new paradigm in dental education.

    Science.gov (United States)

    Hollis, Wainscott; Darnell, Laura A; Hottel, Timothy L

    2011-01-01

    Computer assisted simulation is an important teaching modality in the preclinical training of students. In order to maximize the potential of this learning tool, the University of Tennessee's College of Dentistry has successfully incorporated DentSim technology into the restorative curriculum and has recently acquired the technology to make image guided implantology available to students, residents and faculty. This article describes the university's history and experience with simulation as a learning tool. The purpose of this article is to provide information to other educational institutions on the use of virtual reality simulation in the classroom.

  15. OE CAI: COMPUTER-ASSISTED INSTRUCTION OF OLD ENGLISH

    Directory of Open Access Journals (Sweden)

    Alejandro Alcaraz Sintes

    2002-06-01

    Full Text Available This article offer a general but thorougli survey of Computer Assisted lnstruction as applied to the Old English language íkoni the work of the late 80's pioneers to December 2001. It enibraces all the different facets of the question: stand-alone and web-based applications, Internet sites. CD-ROMs, grammars, dictioriaries, general courses, reading software, extralinguistic material, exercises, handouts, audio files ... Each instruction itee whether it be a website, a java exercise, an online course or an electronic book- is reviewed and URLs are provided in Sootiiotes. These reviews are accompanied all throughout by the pertinent theoretical background and practical advice.

  16. CT quality assurance: computer assisted slice thickness determination.

    Science.gov (United States)

    Schneiders, N J; Bushong, S C

    1980-01-01

    The precise slice geometry of a CT scanner is an important, albeit tedious to determine, characteristic. A series of computer programs have been developed to analyze the slice thickness insert of the AAPM phantom. Without operator assistance they generate the beam profiles and slice thicknesses at three points in the scan field. A representative analysis is done on an AS&E scanner with slice thickness settings of 2 to 10 mm. The resulting discrepent measured thicknesses, ranging from 3 to 8 mm, indicate the need to perform such slice thickness measurements as part of a regular quality assurance program.

  17. Providing Assistive Technology Applications as a Service Through Cloud Computing.

    Science.gov (United States)

    Mulfari, Davide; Celesti, Antonio; Villari, Massimo; Puliafito, Antonio

    2015-01-01

    Users with disabilities interact with Personal Computers (PCs) using Assistive Technology (AT) software solutions. Such applications run on a PC that a person with a disability commonly uses. However the configuration of AT applications is not trivial at all, especially whenever the user needs to work on a PC that does not allow him/her to rely on his / her AT tools (e.g., at work, at university, in an Internet point). In this paper, we discuss how cloud computing provides a valid technological solution to enhance such a scenario.With the emergence of cloud computing, many applications are executed on top of virtual machines (VMs). Virtualization allows us to achieve a software implementation of a real computer able to execute a standard operating system and any kind of application. In this paper we propose to build personalized VMs running AT programs and settings. By using the remote desktop technology, our solution enables users to control their customized virtual desktop environment by means of an HTML5-based web interface running on any computer equipped with a browser, whenever they are.

  18. Using Simultaneous Prompting and Computer-Assisted Instruction to Teach Narrative Writing Skills to Students with Autism

    Science.gov (United States)

    Pennington, Robert C.; Collins, Belva C.; Stenhoff, Donald M.; Turner, Kennedy; Gunselman, Karen

    2014-01-01

    Despite the importance of written expression to the lives of individuals with autism spectrum disorders (ASD), there is limited research on teaching writing skills to this population. In the current study, we used a multiple probe across behaviors design to evaluate the effects of simultaneous prompting (SP) and computer-assisted instruction (CAI)…

  19. Promoting Intrinsic and Extrinsic Motivation among Chemistry Students Using Computer-Assisted Instruction

    Science.gov (United States)

    Gambari, Isiaka A.; Gbodi, Bimpe E.; Olakanmi, Eyitao U.; Abalaka, Eneojo N.

    2016-01-01

    The role of computer-assisted instruction in promoting intrinsic and extrinsic motivation among Nigerian secondary school chemistry students was investigated in this study. The study employed two modes of computer-assisted instruction (computer simulation instruction and computer tutorial instructional packages) and two levels of gender (male and…

  20. Computer-Assisted Technique for Surgical Tooth Extraction.

    Science.gov (United States)

    Hamza, Hosamuddin

    2016-01-01

    Introduction. Surgical tooth extraction is a common procedure in dentistry. However, numerous extraction cases show a high level of difficulty in practice. This difficulty is usually related to inadequate visualization, improper instrumentation, or other factors related to the targeted tooth (e.g., ankyloses or presence of bony undercut). Methods. In this work, the author presents a new technique for surgical tooth extraction based on 3D imaging, computer planning, and a new concept of computer-assisted manufacturing. Results. The outcome of this work is a surgical guide made by 3D printing of plastics and CNC of metals (hybrid outcome). In addition, the conventional surgical cutting tools (surgical burs) are modified with a number of stoppers adjusted to avoid any excessive drilling that could harm bone or other vital structures. Conclusion. The present outcome could provide a minimally invasive technique to overcome the routine complications facing dental surgeons in surgical extraction procedures.

  1. Cartographic Modeling: Computer-assisted Analysis of Spatially Defined Neighborhoods

    Science.gov (United States)

    Berry, J. K.; Tomlin, C. D.

    1982-01-01

    Cartographic models addressing a wide variety of applications are composed of fundamental map processing operations. These primitive operations are neither data base nor application-specific. By organizing the set of operations into a mathematical-like structure, the basis for a generalized cartographic modeling framework can be developed. Among the major classes of primitive operations are those associated with reclassifying map categories, overlaying maps, determining distance and connectivity, and characterizing cartographic neighborhoods. The conceptual framework of cartographic modeling is established and techniques for characterizing neighborhoods are used as a means of demonstrating some of the more sophisticated procedures of computer-assisted map analysis. A cartographic model for assessing effective roundwood supply is briefly described as an example of a computer analysis. Most of the techniques described have been implemented as part of the map analysis package developed at the Yale School of Forestry and Environmental Studies.

  2. Computer-Assisted Technique for Surgical Tooth Extraction

    Directory of Open Access Journals (Sweden)

    Hosamuddin Hamza

    2016-01-01

    Full Text Available Introduction. Surgical tooth extraction is a common procedure in dentistry. However, numerous extraction cases show a high level of difficulty in practice. This difficulty is usually related to inadequate visualization, improper instrumentation, or other factors related to the targeted tooth (e.g., ankyloses or presence of bony undercut. Methods. In this work, the author presents a new technique for surgical tooth extraction based on 3D imaging, computer planning, and a new concept of computer-assisted manufacturing. Results. The outcome of this work is a surgical guide made by 3D printing of plastics and CNC of metals (hybrid outcome. In addition, the conventional surgical cutting tools (surgical burs are modified with a number of stoppers adjusted to avoid any excessive drilling that could harm bone or other vital structures. Conclusion. The present outcome could provide a minimally invasive technique to overcome the routine complications facing dental surgeons in surgical extraction procedures.

  3. Criteria of Human-computer Interface Design for Computer Assisted Surgery Systems

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jian-guo; LIN Yan-ping; WANG Cheng-tao; LIU Zhi-hong; YANG Qing-ming

    2008-01-01

    In recent years, computer assisted surgery (CAS) systems become more and more common in clinical practices, but few specific design criteria have been proposed for human-computer interface (HCI) in CAS systems. This paper tried to give universal criteria of HCI design for CAS systems through introduction of demonstration application, which is total knee replacement (TKR) with a nonimage-based navigation system.A typical computer assisted process can be divided into four phases: the preoperative planning phase, the intraoperative registration phase, the intraoperative navigation phase and finally the postoperative assessment phase. The interface design for four steps is described respectively in the demonstration application. These criteria this paper summarized can be useful to software developers to achieve reliable and effective interfaces for new CAS systems more easily.

  4. Helping Children Learn Vocabulary during Computer-Assisted Oral Reading

    Directory of Open Access Journals (Sweden)

    Gregory Aist

    2002-04-01

    Full Text Available This paper addresses an indispensable skill using a unique method to teach a critical component: helping children learn to read by using computer-assisted oral reading to help children learn vocabulary. We build on Project LISTEN’s Reading Tutor, a computer program that adapts automatic speech recognition to listen to children read aloud, and helps them learn to read (http://www.cs.cmu.edu/~listen. To learn a word from reading with the Reading Tutor, students must encounter the word and learn the meaning of the word in context. We modified the Reading Tutor first to help students encounter new words and then to help them learn the meanings of new words. We then compared the Reading Tutor to classroom instruction and to human-assisted oral reading as part of a yearlong study with 144 second and third graders. The result: Second graders did about the same on word comprehension in all three conditions. However, third graders who read with the 1999 Reading Tutor, modified as described in this paper, performed statistically significantly better than other third graders in a classroom control on word comprehension gains – and even comparably with other third graders who read one-on-one with human tutors.

  5. Stability Outcomes following Computer-Assisted ACL Reconstruction

    Directory of Open Access Journals (Sweden)

    Melissa A. Christino

    2015-01-01

    Full Text Available Purpose. The purpose of this study was to determine whether intraoperative prereconstruction stability measurements and/or patient characteristics were associated with final knee stability after computer-assisted ACL reconstruction. Methods. This was a retrospective review of all patients who underwent computer-assisted single-bundle ACL reconstruction by a single surgeon. Prereconstruction intraoperative stability measurements were correlated with patient characteristics and postreconstruction stability measurements. 143 patients were included (87 male and 56 female. Average age was 29.8 years (SD ± 11.8. Results. Females were found to have significantly more pre- and postreconstruction internal rotation than males (P < 0.001 and P = 0.001, resp.. Patients with additional intra-articular injuries demonstrated more prereconstruction anterior instability than patients with isolated ACL tears (P < 0.001. After reconstruction, these patients also had higher residual anterior translation (P = 0.01. Among all patients with ACL reconstructions, the percent of correction of anterior translation was found to be significantly higher than the percent of correction for internal or external rotation (P < 0.001. Conclusion. Anterior translation was corrected the most using a single-bundle ACL reconstruction. Females had higher pre- and postoperative internal rotation. Patients with additional injuries had greater original anterior translation and less operative correction of anterior translation compared to patients with isolated ACL tears.

  6. Experimental evaluation of assistive behaviors for man-portable robots

    Science.gov (United States)

    Pierce, C.; Baran, D.; Bodt, B.

    2010-04-01

    Man portable robots have been fielded extensively on the battlefield to enhance mission effectiveness of soldiers in dangerous conditions. The robots that have been deployed to date have been teleoperated. The development of assistive behaviors for these robots has the potential to alleviate the cognitive load placed on the robot operator. While full autonomy is the eventual goal, a range of assistive capabilities such as obstacle detection, obstacle avoidance, waypoint navigation, can be fielded sooner in a stand-alone fashion. These capabilities increase the level of autonomy on the robots so that the workload on the soldier can be reduced. The focus of this paper is on the design and execution of a series of scientifically rigorous experiments to quantifiably assess operator performance when operating a robot equipped with some of these assistive behaviors. The experiments helped to determine a baseline for teleoperation and to evaluate the benefit of Obstacle Detection and Obstacle Avoidance (OD/OA) vs. teleoperation and OD/OA with Open Space Planning (OSP) vs. teleoperation. The results of these experiments are presented and analyzed in the paper.

  7. What's New in Software? Current Sources of Information Boost Effectiveness of Computer-Assisted Instruction.

    Science.gov (United States)

    Ellsworth, Nancy J.

    1990-01-01

    This article reviews current resources on computer-assisted instruction. Included are sources of software and hardware evaluations, advances in current technology, research, an information hotline, and inventories of available technological assistance. (DB)

  8. Computational Analysis of Pharmacokinetic Behavior of Ampicillin

    Directory of Open Access Journals (Sweden)

    Mária Ďurišová

    2016-07-01

    Full Text Available orrespondence: Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, 841 04 Bratislava, Slovak Republic. Phone + 42-1254775928; Fax +421254775928; E-mail: maria.durisova@savba.sk 84 RESEARCH ARTICLE The objective of this study was to perform a computational analysis of the pharmacokinetic behavior of ampicillin, using data from the literature. A method based on the theory of dynamic systems was used for modeling purposes. The method used has been introduced to pharmacokinetics with the aim to contribute to the knowledge base in pharmacokinetics by including the modeling method which enables researchers to develop mathematical models of various pharmacokinetic processes in an identical way, using identical model structures. A few examples of a successful use of the modeling method considered here in pharmacokinetics can be found in full texts articles available free of charge at the website of the author, and in the example given in the this study. The modeling method employed in this study can be used to develop a mathematical model of the pharmacokinetic behavior of any drug, under the condition that the pharmacokinetic behavior of the drug under study can be at least partially approximated using linear models.

  9. Computer-assisted Orthopaedic Surgery: Current State and Future Perspective

    Directory of Open Access Journals (Sweden)

    Guoyan eZheng

    2015-12-01

    Full Text Available Introduced about two decades ago, computer-assisted orthopaedic surgery (CAOS has emerged as a new and independent area, due to the importance of treatment of musculoskeletal diseases in orthopaedics and traumatology, increasing availability of different imaging modalities, and advances in analytics and navigation tools. The aim of this paper is to present the basic elements of CAOS devices and to review state-of-the-art examples of different imaging modalities used to create the virtual representations, of different position tracking devices for navigation systems, of different surgical robots, of different methods for registration and referencing, and of CAOS modules that have been realized for different surgical procedures. Future perspectives will also be outlined.

  10. APLIKASI PEMBELAJARAN ALGORITMA DASAR INTERAKTIF BERBASISKAN COMPUTER ASSISTED INSTRUCTION

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    Budi Yulianto

    2013-11-01

    Full Text Available Book as a learning method is less effective and interactive since it can not deliver motion animation. Thus, a more interactive learning method is needed to have a better learning process. The goal of the research is developing an application that provides easiness for students in learning algorithm by combining computer assisted instruction (CAI and internet technology. On the development phase, the research method to uses fact finding by a survey to students who are or have been learning algorithm and a literature study, and also waterfall method for software development. The research output is a CAI application for learning algorithm interactively. The developed application is interactive for learning process and able to help students in deepen algorithm topics.

  11. Mechatronics Interface for Computer Assisted Prostate Surgery Training

    Science.gov (United States)

    Altamirano del Monte, Felipe; Padilla Castañeda, Miguel A.; Arámbula Cosío, Fernando

    2006-09-01

    In this work is presented the development of a mechatronics device to simulate the interaction of the surgeon with the surgical instrument (resectoscope) used during a Transurethral Resection of the Prostate (TURP). Our mechatronics interface is part of a computer assisted system for training in TURP, which is based on a 3D graphics model of the prostate which can be deformed and resected interactively by the user. The mechatronics interface, is the device that the urology residents will manipulate to simulate the movements performed during surgery. Our current prototype has five degrees of freedom, which are enough to have a realistic simulation of the surgery movements. Two of these degrees of freedom are linear, to determinate the linear displacement of the resecting loop and the other three are rotational to determinate three directions and amounts of rotation.

  12. Translation Memory and Computer Assisted Translation Tool for Medieval Texts

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    Törcsvári Attila

    2013-05-01

    Full Text Available Translation memories (TMs, as part of Computer Assisted Translation (CAT tools, support translators reusing portions of formerly translated text. Fencing books are good candidates for using TMs due to the high number of repeated terms. Medieval texts suffer a number of drawbacks that make hard even “simple” rewording to the modern version of the same language. The analyzed difficulties are: lack of systematic spelling, unusual word orders and typos in the original. A hypothesis is made and verified that even simple modernization increases legibility and it is feasible, also it is worthwhile to apply translation memories due to the numerous and even extremely long repeated terms. Therefore, methods and algorithms are presented 1. for automated transcription of medieval texts (when a limited training set is available, and 2. collection of repeated patterns. The efficiency of the algorithms is analyzed for recall and precision.

  13. CAPA-An integrated computer-assisted personalized assignment system

    Science.gov (United States)

    Kashy, E.; Sherrill, B. M.; Tsai, Y.; Thaler, D.; Weinshank, D.; Engelmann, M.; Morrissey, D. J.

    1993-12-01

    A new integrated computer-assisted personalized assignment (CAPA) system that creates individual assignments for each student has been developed and found to be a powerful motivator. The CAPA system allows students to enter their answers to personalized assignments directly via networked terminals, gives immediate feedback and hints (allowing challenging questions), while providing the instructor with on-line performance information. The students are encouraged to study together which is known to be an effective learning strategy, but each must still obtain his/her own correct answers. Students are allowed to re-enter solutions to the problems before the due date without penalty, thus providing students with different skills levels the opportunity and incentive to understand the material without being judged during the learning process. The features and operation of the system are described, observations on its use in an introductory general physics class are reported, and some of the highly favorable student reactions are included.

  14. 16th International Conference on Medical Image Computing and Computer Assisted Intervention

    CERN Document Server

    Klinder, Tobias; Li, Shuo

    2014-01-01

    This book contains the full papers presented at the MICCAI 2013 workshop Computational Methods and Clinical Applications for Spine Imaging. The workshop brought together researchers representing several fields, such as Biomechanics, Engineering, Medicine, Mathematics, Physics and Statistic. The works included in this book present and discuss new trends in those fields, using several methods and techniques in order to address more efficiently different and timely applications involving signal and image acquisition, image processing and analysis, image segmentation, image registration and fusion, computer simulation, image based modelling, simulation and surgical planning, image guided robot assisted surgical and image based diagnosis.

  15. Computer-Assisted Inverse Design of Inorganic Electrides

    Science.gov (United States)

    Zhang, Yunwei; Wang, Hui; Wang, Yanchao; Zhang, Lijun; Ma, Yanming

    2017-01-01

    Electrides are intrinsic electron-rich materials enabling applications as excellent electron emitters, superior catalysts, and strong reducing agents. There are a number of organic electrides; however, their instability at room temperature and sensitivity to moisture are bottlenecks for their practical uses. Known inorganic electrides are rare, but they appear to have greater thermal stability at ambient conditions and are thus better characterized for application. Here, we develop a computer-assisted inverse-design method for searching for a large variety of inorganic electrides unbiased by any known electride structures. It uses the intrinsic property of interstitial electron localization of electrides as the global variable function for swarm intelligence structure searches. We construct two rules of thumb on the design of inorganic electrides pointing to electron-rich ionic systems and low electronegativity of the cationic elements involved. By screening 99 such binary compounds through large-scale computer simulations, we identify 24 stable and 65 metastable new inorganic electrides that show distinct three-, two-, and zero-dimensional conductive properties, among which 18 are existing compounds that have not been pointed to as electrides. Our work reveals the rich abundance of inorganic electrides by providing 33 hitherto unexpected structure prototypes of electrides, of which 19 are not in the known structure databases.

  16. Computer-Assisted Transgenesis of Caenorhabditis elegans for Deep Phenotyping.

    Science.gov (United States)

    Gilleland, Cody L; Falls, Adam T; Noraky, James; Heiman, Maxwell G; Yanik, Mehmet F

    2015-09-01

    A major goal in the study of human diseases is to assign functions to genes or genetic variants. The model organism Caenorhabditis elegans provides a powerful tool because homologs of many human genes are identifiable, and large collections of genetic vectors and mutant strains are available. However, the delivery of such vector libraries into mutant strains remains a long-standing experimental bottleneck for phenotypic analysis. Here, we present a computer-assisted microinjection platform to streamline the production of transgenic C. elegans with multiple vectors for deep phenotyping. Briefly, animals are immobilized in a temperature-sensitive hydrogel using a standard multiwell platform. Microinjections are then performed under control of an automated microscope using precision robotics driven by customized computer vision algorithms. We demonstrate utility by phenotyping the morphology of 12 neuronal classes in six mutant backgrounds using combinations of neuron-type-specific fluorescent reporters. This technology can industrialize the assignment of in vivo gene function by enabling large-scale transgenic engineering.

  17. Computer-assisted sperm analysis (CASA): capabilities and potential developments.

    Science.gov (United States)

    Amann, Rupert P; Waberski, Dagmar

    2014-01-01

    Computer-assisted sperm analysis (CASA) systems have evolved over approximately 40 years, through advances in devices to capture the image from a microscope, huge increases in computational power concurrent with amazing reduction in size of computers, new computer languages, and updated/expanded software algorithms. Remarkably, basic concepts for identifying sperm and their motion patterns are little changed. Older and slower systems remain in use. Most major spermatology laboratories and semen processing facilities have a CASA system, but the extent of reliance thereon ranges widely. This review describes capabilities and limitations of present CASA technology used with boar, bull, and stallion sperm, followed by possible future developments. Each marketed system is different. Modern CASA systems can automatically view multiple fields in a shallow specimen chamber to capture strobe-like images of 500 to >2000 sperm, at 50 or 60 frames per second, in clear or complex extenders, and in CASA cannot accurately predict 'fertility' that will be obtained with a semen sample or subject. However, when carefully validated, current CASA systems provide information important for quality assurance of semen planned for marketing, and for the understanding of the diversity of sperm responses to changes in the microenvironment in research. The four take-home messages from this review are: (1) animal species, extender or medium, specimen chamber, intensity of illumination, imaging hardware and software, instrument settings, technician, etc., all affect accuracy and precision of output values; (2) semen production facilities probably do not need a substantially different CASA system whereas biology laboratories would benefit from systems capable of imaging and tracking sperm in deep chambers for a flexible period of time; (3) software should enable grouping of individual sperm based on one or more attributes so outputs reflect subpopulations or clusters of similar sperm with unique

  18. Computer Assisted Design, Prediction, and Execution of Economical Organic Syntheses

    Science.gov (United States)

    Gothard, Nosheen Akber

    The synthesis of useful organic molecules via simple and cost-effective routes is a core challenge in organic chemistry. In industry or academia, organic chemists use their chemical intuition, technical expertise and published procedures to determine an optimal pathway. This approach, not only takes time and effort, but also is cost prohibitive. Many potential optimal routes scratched on paper fail to get experimentally tested. In addition, with new methods being discovered daily are often overlooked by established techniques. This thesis reports a computational technique that assist the discovery of economical synthetic routes to useful organic targets. Organic chemistry exists as a network where chemicals are connected by reactions, analogous to citied connected by roads in a geographic map. This network topology of organic reactions in the network of organic chemistry (NOC) allows the application of graph-theory to devise algorithms for synthetic optimization of organic targets. A computational approach comprised of customizable algorithms, pre-screening filters, and existing chemoinformatic techniques is capable of answering complex questions and perform mechanistic tasks desired by chemists such as optimization of organic syntheses. One-pot reactions are central to modern synthesis since they save resources and time by avoiding isolation, purification, characterization, and production of chemical waste after each synthetic step. Sometimes, such reactions are identified by chance or, more often, by careful inspection of individual steps that are to be wired together. Algorithms are used to discover one-pot reactions and validated experimentally. Which demonstrate that the computationally predicted sequences can indeed by carried out experimentally in good overall yields. The experimental examples are chosen to from small networks of reactions around useful chemicals such as quinoline scaffolds, quinoline-based inhibitors of phosphoinositide 3-kinase delta (PI3

  19. A Hybrid Segmentation Framework for Computer-Assisted Dental Procedures

    Science.gov (United States)

    Hosntalab, Mohammad; Aghaeizadeh Zoroofi, Reza; Abbaspour Tehrani-Fard, Ali; Shirani, Gholamreza; Reza Asharif, Mohammad

    Teeth segmentation in computed tomography (CT) images is a major and challenging task for various computer assisted procedures. In this paper, we introduced a hybrid method for quantification of teeth in CT volumetric dataset inspired by our previous experiences and anatomical knowledge of teeth and jaws. In this regard, we propose a novel segmentation technique using an adaptive thresholding, morphological operations, panoramic re-sampling and variational level set algorithm. The proposed method consists of several steps as follows: first, we determine the operation region in CT slices. Second, the bony tissues are separated from other tissues by utilizing an adaptive thresholding technique based on the 3D pulses coupled neural networks (PCNN). Third, teeth tissue is classified from other bony tissues by employing panorex lines and anatomical knowledge of teeth in the jaws. In this case, the panorex lines are estimated using Otsu thresholding and mathematical morphology operators. Then, the proposed method is followed by calculating the orthogonal lines corresponding to panorex lines and panoramic re-sampling of the dataset. Separation of upper and lower jaws and initial segmentation of teeth are performed by employing the integral projections of the panoramic dataset. Based the above mentioned procedures an initial mask for each tooth is obtained. Finally, we utilize the initial mask of teeth and apply a variational level set to refine initial teeth boundaries to final contour. In the last step a surface rendering algorithm known as marching cubes (MC) is applied to volumetric visualization. The proposed algorithm was evaluated in the presence of 30 cases. Segmented images were compared with manually outlined contours. We compared the performance of segmentation method using ROC analysis of the thresholding, watershed and our previous works. The proposed method performed best. Also, our algorithm has the advantage of high speed compared to our previous works.

  20. The Effect of Computer-Assisted Teaching on Remedying Misconceptions: The Case of the Subject "Probability"

    Science.gov (United States)

    Gurbuz, Ramazan; Birgin, Osman

    2012-01-01

    The aim of this study is to determine the effects of computer-assisted teaching (CAT) on remedying misconceptions students often have regarding some probability concepts in mathematics. Toward this aim, computer-assisted teaching materials were developed and used in the process of teaching. Within the true-experimental research method, a pre- and…

  1. The Effects of Computer-Assisted Feedback Strategies in Technology Education: A Comparison of Learning Outcomes

    Science.gov (United States)

    Adams, Ruifang Hope; Strickland, Jane

    2012-01-01

    This study investigated the effects of computer-assisted feedback strategies that have been utilized by university students in a technology education curriculum. Specifically, the study examined the effectiveness of the computer-assisted feedback strategy "Knowledge of Response feedback" (KOR), and the "Knowledge of Correct Responses feedback"…

  2. Effectiveness of Computer-Assisted Mathematics Education (CAME) over Academic Achievement: A Meta-Analysis Study

    Science.gov (United States)

    Demir, Seda; Basol, Gülsah

    2014-01-01

    The aim of the current study is to determine the overall effects of Computer-Assisted Mathematics Education (CAME) on academic achievement. After an extensive review of the literature, studies using Turkish samples and observing the effects of Computer-Assisted Education (CAE) on mathematics achievement were examined. As a result of this…

  3. Applications of NLP Techniques to Computer-Assisted Authoring of Test Items for Elementary Chinese

    Science.gov (United States)

    Liu, Chao-Lin; Lin, Jen-Hsiang; Wang, Yu-Chun

    2010-01-01

    The authors report an implemented environment for computer-assisted authoring of test items and provide a brief discussion about the applications of NLP techniques for computer assisted language learning. Test items can serve as a tool for language learners to examine their competence in the target language. The authors apply techniques for…

  4. Middle School Teachers' Perceptions of Computer-Assisted Reading Intervention Programs

    Science.gov (United States)

    Bippert, Kelli; Harmon, Janis

    2017-01-01

    Middle schools often turn to computer-assisted reading intervention programs to improve student reading. The questions guiding this study are (a) in what ways are computer-assisted reading intervention programs utilized, and (b) what are teachers' perceptions about these intervention programs? Nineteen secondary reading teachers were interviewed…

  5. Computer-Assisted Diagnostic Decision Support: History, Challenges, and Possible Paths Forward

    Science.gov (United States)

    Miller, Randolph A.

    2009-01-01

    This paper presents a brief history of computer-assisted diagnosis, including challenges and future directions. Some ideas presented in this article on computer-assisted diagnostic decision support systems (CDDSS) derive from prior work by the author and his colleagues (see list in Acknowledgments) on the INTERNIST-1 and QMR projects. References…

  6. Analisis cualitativo asistido por computadora Computer-assisted qualitative analysis

    Directory of Open Access Journals (Sweden)

    César A. Cisneros Puebla

    2003-01-01

    Full Text Available Los objetivos de este ensayo son: por un lado, presentar una aproximación a la experiencia hispanoamericana en el Análisis Cualitativo Asistido por Computadora (ACAC al agrupar mediante un ejercicio de sistematización los trabajos realizados por diversos colegas provenientes de disciplinas afines. Aunque hubiese querido ser exhaustivo y minucioso, como cualquier intento de sistematización de experiencias, en este ejercicio son notables las ausencias y las omisiones. Introducir algunas reflexiones teóricas en torno al papel del ACAC en el desarrollo de la investigación cualitativa a partir de esa sistematización y con particular énfasis en la producción del dato es, por otro lado, objetivo central de esta primera aproximación.The aims of this article are: on the one hand, to present an approximation to the Hispano-American experience on Computer-Assisted Qualitative Data Analysis (CAQDAS, grouping as a systematization exercise the works carried out by several colleagues from related disciplines. Although attempting to be exhaustive and thorough - as in any attempt at systematizing experiences - this exercise presents clear lacks and omissions. On the other hand, to introduce some theoretical reflections about the role played by CAQDAS in the development of qualitative investigation after that systematization, with a specific focus on data generation.

  7. Computer-assisted learning in human and dental medicine.

    Science.gov (United States)

    Höhne, S; Schumann, R R

    2004-04-01

    This article describes the development and application of new didactic methods for use in computer-assisted teaching and learning systems for training doctors and dentists. Taking the Meducase project as an example, didactic models and their technological implementation are explained, together with the limitations of imparting knowledge with the "new media". In addition, legal concepts for a progressive, pragmatic, and innovative distribution of knowledge to undergraduate students are presented. In conclusion, potential and visions for the wide use of electronic learning in the German and European universities in the future are discussed. Self-directed learning (SDL) is a key component in both undergraduate education and lifelong learning for medical practitioners. E-learning can already be used to promote SDL at undergraduate level. The Meducase project uses self-directed, constructive, case- and problem-oriented learning within a learning platform for medical and dental students. In the long run, e-learning programs can only be successful in education if there is consistent analysis and implementation of value-added factors and the development and use of media-didactic concepts matched to electronic learning. The use of innovative forms of licensing - open source licenses for software and similar licenses for content - facilitates continuous, free access to these programs for all students and teachers. These legal concepts offer the possibility of innovative knowledge distribution, quality assurance and standardization across specializations, university departments, and possibly even national borders.

  8. Computer-assisted education system for arrhythmia (CAESAR).

    Science.gov (United States)

    Fukushima, M; Inoue, M; Fukunami, M; Ishikawa, K; Inada, H; Abe, H

    1984-08-01

    A computer-assisted education system for arrhythmia (CAESAR) was developed for students to acquire the ability to logically diagnose complicated arrhythmias. This system has a logical simulator of cardiac rhythm using a mathematical model of the impulse formation and conduction system of the heart. A simulated arrhythmia (ECG pattern) is given on a graphic display unit with simulated series of the action potential of five pacemaker centers and the "ladder diagram" of impulse formation and conduction, which show the mechanism of that arrhythmia. For the purpose of the evaluation of this system, 13 medical students were given two types of tests concerning arrhythmias before and after 2-hr learning with this system. The scores they obtained after learning increased significantly from 73.3 +/- 11.9 to 93.2 +/- 3.0 (P less than 0.001) in one test and from 47.2 +/- 17.9 to 64.9 +/- 19.6 (P less than 0.001) in another one. These results proved that this CAI system is useful and effective for training ECG interpretation of arrhythmias.

  9. Implementation of Computer Assisted Test Selection System in Local Governments

    Directory of Open Access Journals (Sweden)

    Abdul Azis Basri

    2016-05-01

    Full Text Available As an evaluative way of selection of civil servant system in all government areas, Computer Assisted Test selection system was started to apply in 2013. In phase of implementation for first time in all areas in 2014, this system selection had trouble in several areas, such as registration procedure and passing grade. The main objective of this essay was to describe implementation of new selection system for civil servants in the local governments and to seek level of effectiveness of this selection system. This essay used combination of study literature and field survey which data collection was made by interviews, observations, and documentations from various sources, and to analyze the collected data, this essay used reduction, display data and verification for made the conclusion. The result of this essay showed, despite there a few parts that be problem of this system such as in the registration phase but almost all phases of implementation of CAT selection system in local government areas can be said was working clearly likes in preparation, implementation and result processing phase. And also this system was fulfilled two of three criterias of effectiveness for selection system, they were accuracy and trusty. Therefore, this selection system can be said as an effective way to select new civil servant. As suggestion, local governments have to make prime preparation in all phases of test and make a good feedback as evaluation mechanism and together with central government to seek, fix and improve infrastructures as supporting tool and competency of local residents.

  10. Natural language processing tools for computer assisted language learning

    Directory of Open Access Journals (Sweden)

    Vandeventer Faltin, Anne

    2003-01-01

    Full Text Available This paper illustrates the usefulness of natural language processing (NLP tools for computer assisted language learning (CALL through the presentation of three NLP tools integrated within a CALL software for French. These tools are (i a sentence structure viewer; (ii an error diagnosis system; and (iii a conjugation tool. The sentence structure viewer helps language learners grasp the structure of a sentence, by providing lexical and grammatical information. This information is derived from a deep syntactic analysis. Two different outputs are presented. The error diagnosis system is composed of a spell checker, a grammar checker, and a coherence checker. The spell checker makes use of alpha-codes, phonological reinterpretation, and some ad hoc rules to provide correction proposals. The grammar checker employs constraint relaxation and phonological reinterpretation as diagnosis techniques. The coherence checker compares the underlying "semantic" structures of a stored answer and of the learners' input to detect semantic discrepancies. The conjugation tool is a resource with enhanced capabilities when put on an electronic format, enabling searches from inflected and ambiguous verb forms.

  11. Generalization of Computer Assisted Prosody Training: Quantitative and Qualitative Findings

    Directory of Open Access Journals (Sweden)

    Debra M. Hardison

    2004-01-01

    Full Text Available Two experiments investigated the effectiveness of computer-assisted prosody training, its generalization to novel sentences and segmental accuracy, and the relationship between prosodic and lexical information in long-term memory. Experiment 1, using a pretest-posttest design, provided native English-speaking learners of French with 3 weeks of training focused on prosody using a real-time computerized pitch display. Multiple exemplars produced by native speakers (NSs of French and stored on hard disk provided training feedback. Learners' recorded pre- and posttest productions were presented to NSs for evaluation in two conditions: filtered (unintelligible segmental information and unfiltered. Ratings using 7-point scales for the prosody and segmental accuracy of unfiltered samples revealed significant improvement in prosody with generalization to segmental production and novel sentences. Comparison of prosody ratings for filtered and unfiltered samples revealed some segmental influence on the pretest ratings of prosody. In Experiment 2, involving a memory recall task using filtered stimuli of reduced intelligibility, learners identified the exact lexical content of an average of 80% of the training sentences based on prosodic cues consistent with exemplar-based learning models. Questionnaire responses indicated a greater awareness of the various aspects of speech and increased confidence in producing another language.

  12. Computer-Assisted Reconstruction and Motion Analysis of the Three-Dimensional Cell

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    David R. Soll

    2003-01-01

    Full Text Available Even though several microscopic techniques provide three-dimensional (3D information on fixed and living cells, the perception persists that cells are two-dimensional (2D. Cells are, in fact, 3D and their behavior, including the extension of pseudopods, includes an important 3D component. Although treating the cell as a 2D entity has proven effective in understanding how cells locomote, and in identifying defects in a variety of mutant and abnormal cells, there are cases in which 3D reconstruction and analysis are essential. Here, we describe advanced computer-assisted 3D reconstruction and motion analysis programs for both individual live, crawling cells and developing embryos. These systems (3D-DIAS, 3D-DIASemb can be used to reconstruct and motion analyze at short time intervals the nucleus and pseudopodia as well as the entire surface of a single migrating cell, or every cell and nucleus in a developing embryo. Because all images are converted to mathematical representations, a variety of motility and dynamic morphology parameters can be computed that have proven quite valuable in the identification of mutant behaviors. We also describe examples of mutant behaviors in Dictyostelium that were revealed through 3D analysis.

  13. Blind trials of computer-assisted structure elucidation software

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    Moser Arvin

    2012-02-01

    Full Text Available Abstract Background One of the largest challenges in chemistry today remains that of efficiently mining through vast amounts of data in order to elucidate the chemical structure for an unknown compound. The elucidated candidate compound must be fully consistent with the data and any other competing candidates efficiently eliminated without doubt by using additional data if necessary. It has become increasingly necessary to incorporate an in silico structure generation and verification tool to facilitate this elucidation process. An effective structure elucidation software technology aims to mimic the skills of a human in interpreting the complex nature of spectral data while producing a solution within a reasonable amount of time. This type of software is known as computer-assisted structure elucidation or CASE software. A systematic trial of the ACD/Structure Elucidator CASE software was conducted over an extended period of time by analysing a set of single and double-blind trials submitted by a global audience of scientists. The purpose of the blind trials was to reduce subjective bias. Double-blind trials comprised of data where the candidate compound was unknown to both the submitting scientist and the analyst. The level of expertise of the submitting scientist ranged from novice to expert structure elucidation specialists with experience in pharmaceutical, industrial, government and academic environments. Results Beginning in 2003, and for the following nine years, the algorithms and software technology contained within ACD/Structure Elucidator have been tested against 112 data sets; many of these were unique challenges. Of these challenges 9% were double-blind trials. The results of eighteen of the single-blind trials were investigated in detail and included problems of a diverse nature with many of the specific challenges associated with algorithmic structure elucidation such as deficiency in protons, structure symmetry, a large number of

  14. Social skills training and computer-assisted cognitive remediation in schizophrenia.

    Science.gov (United States)

    Kurtz, Matthew M; Mueser, Kim T; Thime, Warren R; Corbera, Silvia; Wexler, Bruce E

    2015-03-01

    A growing body of research shows that cognitive remediation (COG REM), consisting of drill-and-practice and/or strategy training in neurocognitive functions, produces moderate improvements in neurocognition. These improvements generalize to functioning when COG REM is provided with other rehabilitation interventions (Wykes et al., 2011). The number of studies using COG REM as an adjunct to other behavioral-based rehabilitation interventions however remains small and consists of widely varying interventions with few active control conditions. This study compared the effects of an extended (6-month), standardized, computer-assisted cognitive remediation intervention, administered along with a standardized program of social skills-training (SST), with those of an active control condition that included participation in the same SST program and a computer skills training program (Computer Skills). Sixty-four individuals with schizophrenia recruited from two treatment sites were randomly assigned to one of two conditions and were assessed by blinded raters on neurocognitive measures, performance-based measures of social skill, and ratings of psychosocial function before and after treatment. Results revealed that the COG REM group improved significantly more in attention, working memory, and empathy than the Computer Skills group, but there were no differences between groups on other measures of psychosocial functioning or skills. Taken together, these findings suggest that COG REM used in the context of other evidence-based psychosocial interventions (SST) improves working memory in schizophrenia and suggests that this effect may generalize to improved empathy.

  15. Computer-assisted initial diagnosis of rare diseases

    Directory of Open Access Journals (Sweden)

    Rui Alves

    2016-07-01

    Full Text Available Introduction. Most documented rare diseases have genetic origin. Because of their low individual frequency, an initial diagnosis based on phenotypic symptoms is not always easy, as practitioners might never have been exposed to patients suffering from the relevant disease. It is thus important to develop tools that facilitate symptom-based initial diagnosis of rare diseases by clinicians. In this work we aimed at developing a computational approach to aid in that initial diagnosis. We also aimed at implementing this approach in a user friendly web prototype. We call this tool Rare Disease Discovery. Finally, we also aimed at testing the performance of the prototype. Methods. Rare Disease Discovery uses the publicly available ORPHANET data set of association between rare diseases and their symptoms to automatically predict the most likely rare diseases based on a patient’s symptoms. We apply the method to retrospectively diagnose a cohort of 187 rare disease patients with confirmed diagnosis. Subsequently we test the precision, sensitivity, and global performance of the system under different scenarios by running large scale Monte Carlo simulations. All settings account for situations where absent and/or unrelated symptoms are considered in the diagnosis. Results. We find that this expert system has high diagnostic precision (≥80% and sensitivity (≥99%, and is robust to both absent and unrelated symptoms. Discussion. The Rare Disease Discovery prediction engine appears to provide a fast and robust method for initial assisted differential diagnosis of rare diseases. We coupled this engine with a user-friendly web interface and it can be freely accessed at http://disease-discovery.udl.cat/. The code and most current database for the whole project can be downloaded from https://github.com/Wrrzag/DiseaseDiscovery/tree/no_classifiers.

  16. Computer-assisted initial diagnosis of rare diseases

    Science.gov (United States)

    Piñol, Marc; Vilaplana, Jordi; Teixidó, Ivan; Cruz, Joaquim; Comas, Jorge; Vilaprinyo, Ester; Sorribas, Albert

    2016-01-01

    Introduction. Most documented rare diseases have genetic origin. Because of their low individual frequency, an initial diagnosis based on phenotypic symptoms is not always easy, as practitioners might never have been exposed to patients suffering from the relevant disease. It is thus important to develop tools that facilitate symptom-based initial diagnosis of rare diseases by clinicians. In this work we aimed at developing a computational approach to aid in that initial diagnosis. We also aimed at implementing this approach in a user friendly web prototype. We call this tool Rare Disease Discovery. Finally, we also aimed at testing the performance of the prototype. Methods. Rare Disease Discovery uses the publicly available ORPHANET data set of association between rare diseases and their symptoms to automatically predict the most likely rare diseases based on a patient’s symptoms. We apply the method to retrospectively diagnose a cohort of 187 rare disease patients with confirmed diagnosis. Subsequently we test the precision, sensitivity, and global performance of the system under different scenarios by running large scale Monte Carlo simulations. All settings account for situations where absent and/or unrelated symptoms are considered in the diagnosis. Results. We find that this expert system has high diagnostic precision (≥80%) and sensitivity (≥99%), and is robust to both absent and unrelated symptoms. Discussion. The Rare Disease Discovery prediction engine appears to provide a fast and robust method for initial assisted differential diagnosis of rare diseases. We coupled this engine with a user-friendly web interface and it can be freely accessed at http://disease-discovery.udl.cat/. The code and most current database for the whole project can be downloaded from https://github.com/Wrrzag/DiseaseDiscovery/tree/no_classifiers. PMID:27547534

  17. Computer-assisted initial diagnosis of rare diseases.

    Science.gov (United States)

    Alves, Rui; Piñol, Marc; Vilaplana, Jordi; Teixidó, Ivan; Cruz, Joaquim; Comas, Jorge; Vilaprinyo, Ester; Sorribas, Albert; Solsona, Francesc

    2016-01-01

    Introduction. Most documented rare diseases have genetic origin. Because of their low individual frequency, an initial diagnosis based on phenotypic symptoms is not always easy, as practitioners might never have been exposed to patients suffering from the relevant disease. It is thus important to develop tools that facilitate symptom-based initial diagnosis of rare diseases by clinicians. In this work we aimed at developing a computational approach to aid in that initial diagnosis. We also aimed at implementing this approach in a user friendly web prototype. We call this tool Rare Disease Discovery. Finally, we also aimed at testing the performance of the prototype. Methods. Rare Disease Discovery uses the publicly available ORPHANET data set of association between rare diseases and their symptoms to automatically predict the most likely rare diseases based on a patient's symptoms. We apply the method to retrospectively diagnose a cohort of 187 rare disease patients with confirmed diagnosis. Subsequently we test the precision, sensitivity, and global performance of the system under different scenarios by running large scale Monte Carlo simulations. All settings account for situations where absent and/or unrelated symptoms are considered in the diagnosis. Results. We find that this expert system has high diagnostic precision (≥80%) and sensitivity (≥99%), and is robust to both absent and unrelated symptoms. Discussion. The Rare Disease Discovery prediction engine appears to provide a fast and robust method for initial assisted differential diagnosis of rare diseases. We coupled this engine with a user-friendly web interface and it can be freely accessed at http://disease-discovery.udl.cat/. The code and most current database for the whole project can be downloaded from https://github.com/Wrrzag/DiseaseDiscovery/tree/no_classifiers.

  18. THE METHOD OF DESIGNING ASSISTED ON COMPUTER OF THE

    Directory of Open Access Journals (Sweden)

    LUCA Cornelia

    2015-05-01

    Full Text Available To the base of the footwear soles designing, is the shoe last. The shoe lasts have irregular shapes, with various curves witch can’t be represented by a simple mathematic function. In order to design the footwear’s soles it’s necessary to take from the shoe last some base contours. These contours are obtained with high precision in a 3D CAD system. In the paper, it will be presented a method of designing of the soles for footwear, computer assisted. The copying process of the shoe last is done using the 3D digitizer. For digitizing, the shoe last spatial shape is positioned on the peripheral of data gathering, witch follows automatically the shoe last’s surface. The wire network obtained through digitizing is numerically interpolated with the interpolator functions in order to obtain the spatial numerical shape of the shoe last. The 3D designing of the sole will be realized on the numerical shape of the shoe last following the next steps: the manufacture of the sole’s surface, the lateral surface realization of the sole’s shape, obtaining the link surface between the lateral side and the planner one of the sole, of the sole’s margin, the sole’s designing contains the skid proof area. The main advantage of the designing method is the design precision, visualization in 3D space of the sole and the possibility to take the best decision viewing the acceptance of new sole’s pattern.

  19. The Effectiveness of Computer Assisted Classes for English as a Second Language

    OpenAIRE

    Ioana Iacob

    2009-01-01

    The present study aims to evaluate the efficiency of the computer assisted English classes and to emphasize the necessity of developing sound methodological strategies adjusted to the new technology. It also present the benefits of using the computer in the pre-school and elementary school classes, highlighted by a report on the comparative observation of four groups of children studying English in a computer assisted environment.

  20. Computer Use and Behavior Problems in Twice-Exceptional Students

    Science.gov (United States)

    Alloway, Tracy Packiam; Elsworth, Miquela; Miley, Neal; Seckinger, Sean

    2016-01-01

    This pilot study investigated how engagement with computer games and TV exposure may affect behaviors of gifted students. We also compared behavioral and cognitive profiles of twice-exceptional students and children with Attention Deficit/Hyperactivity Disorder (ADHD). Gifted students were divided into those with behavioral problems and those…

  1. Human-Computer Interactions and Decision Behavior

    Science.gov (United States)

    1984-01-01

    software interfaces. The major components of the reseach program included the Diaiogue Management System. (DMS) operating environment, the role of...specification; and new methods for modeling, designing, and developing human-computer interfaces based on syntactic and semantic specification. The DMS...achieving communication is language. Accordingly, the transaction model employs a linguistic model consisting of parts that relate computer responses

  2. The Effects of Computer-assisted and Distance Learning of Geometric Modeling

    Directory of Open Access Journals (Sweden)

    Omer Faruk Sozcu

    2013-01-01

    Full Text Available The effects of computer-assisted and distance learning of geometric modeling and computer aided geometric design are studied. It was shown that computer algebra systems and dynamic geometric environments can be considered as excellent tools for teaching mathematical concepts of mentioned areas, and distance education technologies would be indispensable for consolidation of successfully passed topics

  3. PATHWAY ASSEMBLY ASSISTED BY COMPUTER: TEACHING ANAEROBIC GLYCOLYSIS

    Directory of Open Access Journals (Sweden)

    F. M Sarraipa

    2008-05-01

    Full Text Available The  knowledge on  metabolic pathways  is required in  the higher education courses on biological  field.  This  work  presents  a  computer assisted  approach for metabolic pathways self study, based  on their assembly, reaction-by-reaction.  Anaerobic glycolysis was used as a model.  The software was designed to users who have basic knowledge on enzymatic catalysis,  and  to be used with or without teacher’s help. Every reaction is detailed, and the student can move forward only after having assembled each reaction correctly. The software  contains a tutorial  to help users both  on its use, and  on the  correct assembly of each reaction.  The software was field tested  in the basics biochemistry disciplines to the students of Physical Education, Nursing, Medicine and Biology from the State University of Campinas  –  UNICAMP, and in the physiology discipline to the students of Physical Education from the Institute Adventist Sao Paulo – IASP. A database using MySQL was structured to collect data on the software using . Every action taken by the students were recorded. The statistical analysis showed that the number of tries decreases as the students move forward on the pathway assembly. The most difficult reaction besides the first one, were the ones that presented  pattern changes, for example, the sixth reaction was the  first oxidation-reduction reaction. In the first reaction the most frequent mistakes  were using the phosphohexose isomerase as enzyme or having forgotten to include ATP among the substrates. In the sixth reaction the most frequent mistakes was having forgotten to include NAD+ among the substrates. The recorded data analysis can be used by the teachers to give in their lectures, special attention to the reactions were the students made more mistakes.

  4. 45 CFR 233.34 - Computing the assistance payment in the initial one or two months (AFDC).

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 2 2010-10-01 2010-10-01 false Computing the assistance payment in the initial... § 233.34 Computing the assistance payment in the initial one or two months (AFDC). A State shall compute.... (d) A State may suspend, rather than terminate, assistance when: (1) The agency has knowledge of,...

  5. Computer-assisted 3D kinematic analysis of all leg joints in walking insects.

    Directory of Open Access Journals (Sweden)

    John A Bender

    Full Text Available High-speed video can provide fine-scaled analysis of animal behavior. However, extracting behavioral data from video sequences is a time-consuming, tedious, subjective task. These issues are exacerbated where accurate behavioral descriptions require analysis of multiple points in three dimensions. We describe a new computer program written to assist a user in simultaneously extracting three-dimensional kinematics of multiple points on each of an insect's six legs. Digital video of a walking cockroach was collected in grayscale at 500 fps from two synchronized, calibrated cameras. We improved the legs' visibility by painting white dots on the joints, similar to techniques used for digitizing human motion. Compared to manual digitization of 26 points on the legs over a single, 8-second bout of walking (or 106,496 individual 3D points, our software achieved approximately 90% of the accuracy with 10% of the labor. Our experimental design reduced the complexity of the tracking problem by tethering the insect and allowing it to walk in place on a lightly oiled glass surface, but in principle, the algorithms implemented are extensible to free walking. Our software is free and open-source, written in the free language Python and including a graphical user interface for configuration and control. We encourage collaborative enhancements to make this tool both better and widely utilized.

  6. Controlling Combinatorial Complexity in Software and Malware Behavior Computation

    Energy Technology Data Exchange (ETDEWEB)

    Pleszkoch, Mark G [ORNL; Linger, Richard C [ORNL

    2015-01-01

    Virtually all software is out of intellectual control in that no one knows its full behavior. Software Behavior Computation (SBC) is a new technology for understanding everything software does. SBC applies the mathematics of denotational semantics implemented by function composition in Functional Trace Tables (FTTs) to compute the behavior of programs, expressed as disjoint cases of conditional concurrent assignments. In some circumstances, combinatorial explosions in the number of cases can occur when calculating the behavior of sequences of multiple branching structures. This paper describes computational methods that avoid combinatorial explosions. The predicates that control branching structures such as ifthenelses can be organized into three categories: 1) Independent, resulting in no behavior case explosion, 2) Coordinated, resulting in two behavior cases, or 3) Goaloriented, with potential exponential growth in the number of cases. Traditional FTT-based behavior computation can be augmented by two additional computational methods, namely, Single-Value Function Abstractions (SVFAs) and, introduced in this paper, Relational Trace Tables (RTTs). These methods can be applied to the three predicate categories to avoid combinatorial growth in behavior cases while maintaining mathematical correctness.

  7. Training Counselors to Use Computer-Assisted Career Guidance Systems More Effectively: A Model Curriculum

    Science.gov (United States)

    Bobek, Becky L.; Robbins, Steven B.; Gore, Paul A., Jr.; Harris-Bowlsbey, JoAnn; Lapan, Richard T.; Dahir, Carol A.; Jepsen, David A.

    2005-01-01

    A model graduate training curriculum that emphasizes the counselor's role in assisting clients in the effective use of computer-assisted career guidance (CACG) systems is described in this article. This 4-module graduate training program emphasizes client readiness and exploration using CACG systems, skill building and simulation exercises, and…

  8. Computer Assisted Language Learning (CALL): Using Internet for Effective Language Learning

    NARCIS (Netherlands)

    Kremenska, Anelly

    2006-01-01

    Please, cite this publication as: Kremenska, A. (2006). Computer Assisted Language Learning (CALL): Using Internet for Effective Language Learning. Proceedings of International Workshop in Learning Networks for Lifelong Competence Development, TENCompetence Conference. March 30th-31st, Sofia, Bulgar

  9. Robot-Assisted Navigation versus Computer-Assisted Navigation in Primary Total Knee Arthroplasty: Efficiency and Accuracy.

    Science.gov (United States)

    Clark, Tanner C; Schmidt, Frank H

    2013-01-01

    Background. Since the introduction of robot-assisted navigation in primary total knee arthroplasty (TKA), there has been little research conducted examining the efficiency and accuracy of the system compared to computer-assisted navigation systems. Objective. To compare the efficiency and accuracy of Praxim robot-assisted navigation (RAN) and Stryker computer-assisted navigation (CAN) in primary TKA. Methods. This was a retrospective study consisting of 52 patients who underwent primary TKA utilizing RAN and 29 patients utilizing CAN. The primary outcome measure was navigation time. Secondary outcome measures included intraoperative final mechanical axis alignment, intraoperative robot-assisted bone cut accuracy, tourniquet time, and hospitalization length. Results. RAN navigation times were, on average, 9.0 minutes shorter compared to CAN after adjustment. The average absolute intraoperative malalignment was 0.5° less in the RAN procedures compared to the CAN procedures after adjustment. Patients in the RAN group tended to be discharged 0.6 days earlier compared to patients in the CAN group after adjustment. Conclusions. Among patients undergoing TKA, there was decreased navigation time, decreased final malalignment, and decreased hospitalization length associated with the use of RAN when compared to CAN independent of age, BMI, and pre-replacement alignment.

  10. Learner/Machine Interaction in Computer-Assisted Language Learning. Report of the IEC/CILT Computer-Assisted Language Learning Workshop.

    Science.gov (United States)

    Brown, Eric, Comp.

    The proceedings of a conference on learner-machine interaction in computer-assisted language learning (CALL) include the texts of four papers, descriptions of program demonstrations and talks given by participants, a report on the plenary session by Eric Brown, information sources about CALL, a comment on the workshop by Leslie Churchman, a review…

  11. Computer-assisted versus non-computer-assisted preoperative planning of corrective osteotomy for extra-articular distal radius malunions: a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Stockmans Filip

    2010-12-01

    Full Text Available Abstract Background Malunion is the most common complication of distal radius fracture. It has previously been demonstrated that there is a correlation between the quality of anatomical correction and overall wrist function. However, surgical correction can be difficult because of the often complex anatomy associated with this condition. Computer assisted surgical planning, combined with patient-specific surgical guides, has the potential to improve pre-operative understanding of patient anatomy as well as intra-operative accuracy. For patients with malunion of the distal radius fracture, this technology could significantly improve clinical outcomes that largely depend on the quality of restoration of normal anatomy. Therefore, the objective of this study is to compare patient outcomes after corrective osteotomy for distal radius malunion with and without preoperative computer-assisted planning and peri-operative patient-specific surgical guides. Methods/Design This study is a multi-center randomized controlled trial of conventional planning versus computer-assisted planning for surgical correction of distal radius malunion. Adult patients with extra-articular malunion of the distal radius will be invited to enroll in our study. After providing informed consent, subjects will be randomized to two groups: one group will receive corrective surgery with conventional preoperative planning, while the other will receive corrective surgery with computer-assisted pre-operative planning and peri-operative patient specific surgical guides. In the computer-assisted planning group, a CT scan of the affected forearm as well as the normal, contralateral forearm will be obtained. The images will be used to construct a 3D anatomical model of the defect and patient-specific surgical guides will be manufactured. Outcome will be measured by DASH and PRWE scores, grip strength, radiographic measurements, and patient satisfaction at 3, 6, and 12 months

  12. Computer Aided in situ Cognitive Behavioral Therapy

    DEFF Research Database (Denmark)

    Chongtay, Rocio A.; Hansen, John Paulin; Decker, Lone

    2006-01-01

    This article describes the development of a system intended to aid the treatment of certain phobic conditions by the use of computer telephony integration (CTI).A phobia is an irrational fear to some situations or things and interferes with the functioning of the individual that suffers from it...

  13. Computer-Assisted Instruction in an Elementary College Economics Course.

    Science.gov (United States)

    Paden, Donald W.; Barr, Michael D.

    1980-01-01

    Examines the effectiveness of the computer component of a cost effective college course in economics. The main computer ingredients consisted of seven instructional lessons, three one-hour exams, a sophisticated record-keeping system, and note-writing capability. Tables are included. (Author/CHC)

  14. Computer Assisted Instruction (CAI): A Partner for PI?

    Science.gov (United States)

    Edwards, John S.; Tillman, Murray

    1982-01-01

    Discusses differences between computer-delivered instruction and print-delivered instruction and the importance of the role of the instructional design process when adapting traditional teaching materials to newer media. The use of authoring systems for preparing materials and computer-managed instruction as a support for programed instruction are…

  15. Legal Considerations in Computer-Assisted Testing, Counseling and Guidance.

    Science.gov (United States)

    Skeeters, Donald E.

    The question at hand is: Can a computer program be copyrighted, patented, or protected as a trade secret? All three protective methods are examined, with special attention paid to the advantages and disadvantages of each pertinent to computer program protection. The scope of the protection and relevant case law are considered. The paper concludes…

  16. Computer-Assisted Management of Instruction in Veterinary Public Health

    Science.gov (United States)

    Holt, Elsbeth; And Others

    1975-01-01

    Reviews a course in Food Hygiene and Public Health at the University of Illinois College of Veterinary Medicine in which students are sequenced through a series of computer-based lessons or autotutorial slide-tape lessons, the computer also being used to route, test, and keep records. Since grades indicated mastery of the subject, the course will…

  17. Pruning a decision tree for selecting computer-related assistive devices for people with disabilities.

    Science.gov (United States)

    Chi, Chia-Fen; Tseng, Li-Kai; Jang, Yuh

    2012-07-01

    Many disabled individuals lack extensive knowledge about assistive technology, which could help them use computers. In 1997, Denis Anson developed a decision tree of 49 evaluative questions designed to evaluate the functional capabilities of the disabled user and choose an appropriate combination of assistive devices, from a selection of 26, that enable the individual to use a computer. In general, occupational therapists guide the disabled users through this process. They often have to go over repetitive questions in order to find an appropriate device. A disabled user may require an alphanumeric entry device, a pointing device, an output device, a performance enhancement device, or some combination of these. Therefore, the current research eliminates redundant questions and divides Anson's decision tree into multiple independent subtrees to meet the actual demand of computer users with disabilities. The modified decision tree was tested by six disabled users to prove it can determine a complete set of assistive devices with a smaller number of evaluative questions. The means to insert new categories of computer-related assistive devices was included to ensure the decision tree can be expanded and updated. The current decision tree can help the disabled users and assistive technology practitioners to find appropriate computer-related assistive devices that meet with clients' individual needs in an efficient manner.

  18. Computer-assisted measurement of perceived stress: an application for a community-based survey.

    Science.gov (United States)

    Kimura, Tomoaki; Uchida, Seiya; Tsuda, Yasutami; Eboshida, Akira

    2005-09-01

    The assessment of stress is a key issue in health promotion policies as well as in treatment strategies for patients. The aim of this study was to confirm the accessibility and reliability of computer-assisted data collection for perceived stress measurement, using the Japanese version of the Perceived Stress Scale (JPSS), within the setting of a community-based survey. There were two groups of participants in this survey. One group responded to a Web-based application, and the other to the VBA of a spreadsheet software. The total scores of JPSS were almost normally distributed. The means of total scores of JPSS were 23.6 and 23.1. These results were lower than the previous study of JPSS. Since Cronbach's alpha coefficients in both surveys were more than 0.8, high reliability was demonstrated despite a number of computer-illiterate and/or aged participants. They felt that the spreadsheet form was easier to respond to. Two components were extracted with the Varimax rotation of principal component analysis, and these were named "perception of stress and stressors" and "behavior to stress". This finding suggests that it is possible to determine sub-scales. From the viewpoint of preventive medicine, it is expected that the JPSS applications will be utilized to investigate the relationship between stress and other factors such as lifestyle, environment and quality of life.

  19. Evaluating the Influence of the Client Behavior in Cloud Computing.

    Science.gov (United States)

    Souza Pardo, Mário Henrique; Centurion, Adriana Molina; Franco Eustáquio, Paulo Sérgio; Carlucci Santana, Regina Helena; Bruschi, Sarita Mazzini; Santana, Marcos José

    2016-01-01

    This paper proposes a novel approach for the implementation of simulation scenarios, providing a client entity for cloud computing systems. The client entity allows the creation of scenarios in which the client behavior has an influence on the simulation, making the results more realistic. The proposed client entity is based on several characteristics that affect the performance of a cloud computing system, including different modes of submission and their behavior when the waiting time between requests (think time) is considered. The proposed characterization of the client enables the sending of either individual requests or group of Web services to scenarios where the workload takes the form of bursts. The client entity is included in the CloudSim, a framework for modelling and simulation of cloud computing. Experimental results show the influence of the client behavior on the performance of the services executed in a cloud computing system.

  20. Computation of 2-D spectra assisted by compressed sampling

    CERN Document Server

    Almeida, J; Plenio, M B

    2012-01-01

    The computation of scientific data can be very time consuming even if they are ultimately determined by a small number of parameters. The principle of compressed sampling suggests that we can achieve a considerable decrease in the computation time by avoiding the need to sample the full data set. We demonstrate the usefulness of this approach at the hand of 2-D spectra in the context of ultra-fast non-linear spectroscopy of biological systems where numerical calculations are highly challenging due to the considerable computational effort involved in obtaining individual data points.

  1. Computer Aided in situ Cognitive Behavioral Therapy

    DEFF Research Database (Denmark)

    Chongtay, Rocio A.; Hansen, John Paulin; Decker, Lone

    2006-01-01

    . One of the most common and successfully used treatments for phobic conditions has been Cognitive Behavioral Therapy (CBT), which helps people learn to detect thinking patterns that trigger the irrational fear and to replace them with more realistic ideas. The health and financial impacts in society...... presented here is being designed in a modular and scalable fashion. The web-based module can be accessed anywhere any time from a PC connected to the internet and can be used alone or as supplement for a location-based module for in situ gradual exposure therapy....

  2. Using Computer-Assisted Instruction to Enhance Achievement of English Language Learners

    Science.gov (United States)

    Keengwe, Jared; Hussein, Farhan

    2014-01-01

    Computer-assisted instruction (CAI) in English-Language environments offer practice time, motivates students, enhance student learning, increase authentic materials that students can study, and has the potential to encourage teamwork between students. The findings from this particular study suggested that students who used computer assisted…

  3. Views of Pre-Service Primary School Teachers Regarding Computer Assisted Environmental Education

    Science.gov (United States)

    Turan, Ilhan

    2014-01-01

    The main aim of this study is to highlight the importance of computer assisted instruction in environmental education. Recently, the importance of environmental education in many countries has begun to increase in parallel with environmental problems. This has led to increased interest in environmental education. The fact that computers were the…

  4. Integrating Computer-Assisted Language Learning in Saudi Schools: A Change Model

    Science.gov (United States)

    Alresheed, Saleh; Leask, Marilyn; Raiker, Andrea

    2015-01-01

    Computer-assisted language learning (CALL) technology and pedagogy have gained recognition globally for their success in supporting second language acquisition (SLA). In Saudi Arabia, the government aims to provide most educational institutions with computers and networking for integrating CALL into classrooms. However, the recognition of CALL's…

  5. Discourse Synthesis, Analysis and Their Application to CAI (Computer Assisted Instruction).

    Science.gov (United States)

    Su, Stanley Y. W.; Moore, Robert L.

    This paper deals with the computer's production and recognition of sentences in a connected discourse and its application to computer assisted instruction. Studies of textual properties in real discourses have been carried out at the paragraph level. The theoretical concepts of representing paragraph content in terms of (1) the factual data…

  6. Inservice Mathematics Education for Elementary School Teachers Via Computer-Assisted Instruction (Gladeville). Interim Report.

    Science.gov (United States)

    Hall, Keith A.; And Others

    A second field test of a computer-based, mobile, in-service teacher education program in modern mathematics for elementary school teachers is reported here. Evaluations of the students' achievement and of their attitudes towards mathematics and computer-assisted instruction, as well as an analysis of the relationships among achievement, attitudes,…

  7. A Computer-Assisted Instruction in Teaching Abstract Statistics to Public Affairs Undergraduates

    Science.gov (United States)

    Ozturk, Ali Osman

    2012-01-01

    This article attempts to demonstrate the applicability of a computer-assisted instruction supported with simulated data in teaching abstract statistical concepts to political science and public affairs students in an introductory research methods course. The software is called the Elaboration Model Computer Exercise (EMCE) in that it takes a great…

  8. ASSISTANT--Computer Consulting System for Choice and Evaluation of Education Technology.

    Science.gov (United States)

    Ganchev, Nelko; And Others

    1992-01-01

    Discussion of computer systems that help teachers plan and manage the learning process focuses on the development of a computer consulting system, ASSISTANT, which was designed to help teachers choose the most suitable educational technology and evaluate its effectiveness. The organization of the database is explained. (seven references) (LRW)

  9. A Study of Effectiveness of Computer Assisted Instruction (CAI) over Classroom Lecture (CRL) at ICS Level

    Science.gov (United States)

    Kaousar, Tayyeba; Choudhry, Bushra Naoreen; Gujjar, Aijaz Ahmed

    2008-01-01

    This study was aimed to evaluate the effectiveness of CAI vs. classroom lecture for computer science at ICS level. The objectives were to compare the learning effects of two groups with classroom lecture and computer-assisted instruction studying the same curriculum and the effects of CAI and CRL in terms of cognitive development. Hypotheses of…

  10. [AESOP 3000--computer-assisted surgery, personal experience].

    Science.gov (United States)

    Kasalický, M A; Sváb, J; Fried, M; Melechovský, D

    2002-07-01

    At present the most widely used system of CAS is a vocally controlled manipulator of the laparoscope AESOP 3000 (Automated Endoscopic System for Optimal Positioning) which makes it possible to implement some operations without the assistance of another surgeon ("Solo-surgery"). Because of financial costs the so far little used equipment ZEUS or DA VINCI are already "master-slave" systems with several robot arms where the surgeon operates by means of manipulators in the controlling unit without direct contact with the patient. At the First Surgical Clinic, General Faculty Hospital and First Medical Faculty Charles Universitx the authors use the robot system AESOP 3000 since March 2000, in particular in laparoscopic gastric banding on account of obesity, in laparoscopic cholecystectomies, laparoscopic gastroenteroanastomoses and operations in the area if the hiatus. This system made it possible to reduce the number of assisting physicians. E.g. in gastric banding one assistant is sufficient, in laparoscopic cholecystectomy it is possible to operate only with a suture nurse. The application of AESOP is particularly useful in laparoscopic appendectomies and inguinal hernioplasties where it makes possible so-called "solo-surgery" or "one man surgery". No doubt, it is however necessary to have the possibility to call immediately another doctor to the operation theatre in case of necessary conversion of laparoscopy of laparotomy. The authors did not record any case of unwanted movement of the robot arm or another serious technical problem. As compared with a manually guided laparoscope during the use of AESOP the number of unwanted or inadequate shifts of the optical equipment or its angular rotation decreased considerably.

  11. Does assisted driving behavior lead to safety-critical encounters with unequipped vehicles' drivers?

    Science.gov (United States)

    Preuk, Katharina; Stemmler, Eric; Schießl, Caroline; Jipp, Meike

    2016-10-01

    With Intelligent Transport Systems (e.g., traffic light assistance systems) assisted drivers are able to show driving behavior in anticipation of upcoming traffic situations. In the years to come, the penetration rate of such systems will be low. Therefore, the majority of vehicles will not be equipped with these systems. Unequipped vehicles' drivers may not expect the driving behavior of assisted drivers. However, drivers' predictions and expectations can play a significant role in their reaction times. Thus, safety issues could arise when unequipped vehicles' drivers encounter driving behavior of assisted drivers. This is why we tested how unequipped vehicles' drivers (N=60) interpreted and reacted to the driving behavior of an assisted driver. We used a multi-driver simulator with three drivers. The three drivers were driving in a line. The lead driver in the line was a confederate who was followed by two unequipped vehicles' drivers. We varied the equipment of the confederate with an Intelligent Transport System: The confederate was equipped either with or without a traffic light assistance system. The traffic light assistance system provided a start-up maneuver before a light turned green. Therefore, the assisted confederate seemed to show unusual deceleration behavior by coming to a halt at an unusual distance from the stop line at the red traffic light. The unusual distance was varied as we tested a moderate (4m distance from the stop line) and an extreme (10m distance from the stop line) parameterization of the system. Our results showed that the extreme parametrization resulted in shorter minimal time-to-collision of the unequipped vehicles' drivers. One rear-end crash was observed. These results provided initial evidence that safety issues can arise when unequipped vehicles' drivers encounter assisted driving behavior. We recommend that future research identifies counteractions to prevent these safety issues. Moreover, we recommend that system developers

  12. Research on Three Dimensional Computer Assistance Assembly Process Design System

    Institute of Scientific and Technical Information of China (English)

    HOU Wenjun; YAN Yaoqi; DUAN Wenjia; SUN Hanxu

    2006-01-01

    The computer aided process planning will certainly play a significant role in the success of enterprise informationization. 3-dimensional design will promote Tri-dimensional process planning. This article analysis nowadays situation and problems of assembly process planning, gives a 3-dimensional computer aided process planning system (3D-VAPP), and researches on the product information extraction, assembly sequence and path planning in visual interactive assembly process design, dynamic emulation of assembly and process verification, assembly animation outputs and automatic exploding view generation, interactive craft filling and craft knowledge management, etc. It also gives a multi-layer collision detect and multi-perspective automatic camera switching algorithm. Experiments were done to validate the feasibility of such technology and algorithm, which established the foundation of tri-dimensional computer aided process planning.

  13. Computer-assisted detection of epileptiform focuses on SPECT images

    Science.gov (United States)

    Grzegorczyk, Dawid; Dunin-Wąsowicz, Dorota; Mulawka, Jan J.

    2010-09-01

    Epilepsy is a common nervous system disease often related to consciousness disturbances and muscular spasm which affects about 1% of the human population. Despite major technological advances done in medicine in the last years there was no sufficient progress towards overcoming it. Application of advanced statistical methods and computer image analysis offers the hope for accurate detection and later removal of an epileptiform focuses which are the cause of some types of epilepsy. The aim of this work was to create a computer system that would help to find and diagnose disorders of blood circulation in the brain This may be helpful for the diagnosis of the epileptic seizures onset in the brain.

  14. The views of science and technology teachers about computer assisted instruction

    Directory of Open Access Journals (Sweden)

    Ufuk Töman

    2013-08-01

    Full Text Available The purpose of the study is to present the views of the teachers of Primary Science and Technology course about computer assisted instruction. Qualitative research was used in the study. In qualitative researches, the sampling group is small in order to examine the sampling in-depth. Semi-structured interviews were used in the study as data collection tools. The interviews were carried out with the teachers of Science and Technology Course. The participants were chosen from the primary schools located in the city centre of Bayburt. When the findings of the study, which aimed at revealing the views of the teachers of Science and Technology Course about computer assisted instruction, were examined, it was revealed that the teachers had basic knowledge about the benefits of computer assisted instruction practices. In the light of the findings, it was found that most of the teachers did not use computer assisted instruction practices in their lessons. The recent research about the effects of computer assisted instruction is limited in terms of duration and content. Therefore, extended studies in the long run and covering many courses are required.

  15. Computer-Assisted Instruction in Chinese: An Interim Report

    Science.gov (United States)

    Ching-Hsiang Chen; Chin-Chuan Cheng

    1976-01-01

    A report is made of a computer based instructional project in Chinese using the system known as PLATO conducted at the University of Illinois that has resulted in the creation of a file of three thousand Chinese characters and a set of Chinese lessons for first year students. (RM)

  16. Computer-assisted tree taxonomy by automated image recognition

    NARCIS (Netherlands)

    Pauwels, E.J.; Zeeuw, P.M.de; Ranguelova, E.B.

    2009-01-01

    We present an algorithm that performs image-based queries within the domain of tree taxonomy. As such, it serves as an example relevant to many other potential applications within the field of biodiversity and photo-identification. Unsupervised matching results are produced through a chain of comput

  17. Promoting Technology-Assisted Active Learning in Computer Science Education

    Science.gov (United States)

    Gao, Jinzhu; Hargis, Jace

    2010-01-01

    This paper describes specific active learning strategies for teaching computer science, integrating both instructional technologies and non-technology-based strategies shown to be effective in the literature. The theoretical learning components addressed include an intentional method to help students build metacognitive abilities, as well as…

  18. Optimizing conditions for computer-assisted anatomical learning

    NARCIS (Netherlands)

    Luursema, Jan-Maarten; Verwey, Willem B.; Kommers, Piet A.M.; Geelkerken, Robert H.; Vos, Hans J.

    2006-01-01

    An experiment evaluated the impact of two typical features of virtual learning environments on anatomical learning for users of differing visuo-spatial ability. The two features studied are computer-implemented stereopsis (the spatial information that is based on differences in visual patterns proje

  19. Computer-Assisted Instruction; How to Solve Drug Formulation Problems.

    Science.gov (United States)

    Mezei, Janos; And Others

    1990-01-01

    Computer simulation of drug formulation problems involves a database of pharmacological properties, chemical stability, and compatibility data on 20 active ingredients, physiological factors and requirements for parenteral solutions, and additives. The user gathers data from the database, formulates a stable and effective solution, and the drug is…

  20. Computer-Assisted Community Planning and Decision Making.

    Science.gov (United States)

    College of the Atlantic, Bar Harbor, ME.

    The College of the Atlantic (COA) developed a broad-based, interdisciplinary curriculum in ecological policy and community planning and decision-making that incorporates two primary computer-based tools: ARC/INFO Geographic Information System (GIS) and STELLA, a systems-dynamics modeling tool. Students learn how to use and apply these tools…

  1. Computer Graphics For CT-Assisted Knee Surgery

    Science.gov (United States)

    Rhodes, Michael L.; Jackson, Douglas W.; Azzawi, Yu-Ming; Glenn, William V.; Howland, Robert S.; Rothman, Stephen L.

    1984-08-01

    Computed tomography (CT) scanners provide images of internal anatomy with unsurpassed spatial resolution. Since these images are inherently digital, computer systems can be used to simulate, plan, and guide surgical procedures to submillimeter precision. The combination of CT images, specially designed instruments, and the software to coordinate them results in improved accuracy for stereotactic surgery. This paper introduces per cutaneous cruciate ligament replacement as a new application for computer-aided ster eotaxi s. The procedure is described here with the knee firmly attached to a custom device. Twenty-five to thirty CT scans are performed to view the knee in detail, with special care taken to visualize the cruciate ligaments and their attachment to the tibia and femur. At the display console, two trajectories are chosen, using images delivered by the scanner and alternative views generated by software. These trajectories position two attachment shafts through skeletal structure in the knee to secure a replacement cruciate ligament. Interaction is illustrated that allows both the selection of the trajectories and the simulated surgery along their path. Anatomy intersected by the proposed trajectories can be reviewed in detail prior to actual surgery. Once reviewed, frame sittings are delivered by the computer system to drill the ligament attachment shafts. A replacement cruciate ligament can be passed through these two drill holes. Only an arthroscopic procedure is needed for later fixation of the ligament. In this manner, 4-6 hour open surgery of the knee is avoided and patient rehabilitation should be reduced from several months to 4-5 weeks. The frame, software, procedure, and computational aspects of the interaction are described. Test and patient results are given.

  2. A Peer-Assisted Learning Experience in Computer Programming Language Learning and Developing Computer Programming Skills

    Science.gov (United States)

    Altintas, Tugba; Gunes, Ali; Sayan, Hamiyet

    2016-01-01

    Peer learning or, as commonly expressed, peer-assisted learning (PAL) involves school students who actively assist others to learn and in turn benefit from an effective learning environment. This research was designed to support students in becoming more autonomous in their learning, help them enhance their confidence level in tackling computer…

  3. Effectiveness of Computer-Assisted Stad Cooperative Learning Strategy on Physics Problem Solving, Achievement

    Directory of Open Access Journals (Sweden)

    Amosa Isiaka Gambari

    2015-07-01

    Full Text Available This study investigated the effectiveness of computer-assisted Students’ Team Achievement Division (STAD cooperative learning strategy on physics problem solving on students’ achievement and retention. It also examined if the performance of the students would vary with gender. Purposive sampling technique was used to select two senior secondary schools year two physics students (SS II. The schools were assigned into computer-assisted STAD and Individualized Computer Instruction (ICI groups. 84 students from two intact classes participated in the study. Computer-Assisted Learning Package (CALP on physics and Physics Achievement Test (PAT were used as treatment and test instruments respectively. Analysis of Covariance and Scheffe test were used for data analysis. Findings indicated that students taught physics with computer-supported STAD performed and better than their counterparts in ICI group. In addition, they had better retention than those in ICI group. However, gender has no influence on students’ performance. Based on the findings, it was recommended among others that physics teacher should be encouraged to use computer-assisted cooperative instructional to enhance students’ performance.

  4. Technology development for remote, computer-assisted operation of a continuous mining machine

    Energy Technology Data Exchange (ETDEWEB)

    Schnakenberg, G.H. [Pittsburgh Research Center, PA (United States)

    1993-12-31

    The U.S. Bureau of Mines was created to conduct research to improve the health, safety, and efficiency of the coal and metal mining industries. In 1986, the Bureau embarked on a new, major research effort to develop the technology that would enable the relocation of workers from hazardous areas to areas of relative safety. This effort is in contrast to historical efforts by the Bureau of controlling or reducing the hazardous agent or providing protection to the worker. The technologies associated with automation, robotics, and computer software and hardware systems had progressed to the point that their use to develop computer-assisted operation of mobile mining equipment appeared to be a cost-effective and accomplishable task. At the first International Symposium of Mine Mechanization and Automation, an overview of the Bureau`s computer-assisted mining program for underground coal mining was presented. The elements included providing computer-assisted tele-remote operation of continuous mining machines, haulage systems and roof bolting machines. Areas of research included sensors for machine guidance and for coal interface detection. Additionally, the research included computer hardware and software architectures which are extremely important in developing technology that is transferable to industry and is flexible enough to accommodate the variety of machines used in coal mining today. This paper provides an update of the research under the computer-assisted mining program.

  5. The research of computer multimedia assistant in college English listening

    Science.gov (United States)

    Zhang, Qian

    2012-04-01

    With the technology development of network information, there exists more and more seriously questions to our education. Computer multimedia application breaks the traditional foreign language teaching and brings new challenges and opportunities for the education. Through the multiple media application, the teaching process is full of animation, image, voice, and characters. This can improve the learning initiative and objective with great development of learning efficiency. During the traditional foreign language teaching, people use characters learning. However, through this method, the theory performance is good but the practical application is low. During the long time computer multimedia application in the foreign language teaching, many teachers still have prejudice. Therefore, the method is not obtaining the effect. After all the above, the research has significant meaning for improving the teaching quality of foreign language.

  6. Surface Modeling, Solid Modeling and Finite Element Modeling. Analysis Capabilities of Computer-Assisted Design and Manufacturing Systems.

    Science.gov (United States)

    Nee, John G.; Kare, Audhut P.

    1987-01-01

    Explores several concepts in computer assisted design/computer assisted manufacturing (CAD/CAM). Defines, evaluates, reviews and compares advanced computer-aided geometric modeling and analysis techniques. Presents the results of a survey to establish the capabilities of minicomputer based-systems with the CAD/CAM packages evaluated. (CW)

  7. Models for Planning and Simulation in Computer Assisted Orthognatic Surgery

    CERN Document Server

    Chabanas, M; Payan, Y; Boutault, F; Chabanas, Matthieu; Marecaux, Christophe; Payan, Yohan; Boutault, Franck

    2002-01-01

    Two aspects required to establish a planning in orthognatic surgery are addressed in this paper. First, a 3D cephalometric analysis, which is clini-cally essential for the therapeutic decision. Then, an original method to build a biomechanical model of patient face soft tissue, which provides evaluation of the aesthetic outcomes of an intervention. Both points are developed within a clinical application context for computer aided maxillofacial surgery.

  8. [Computer-assisted histocompatibility assessment in mixed lymphocyte culture (MLC)].

    Science.gov (United States)

    Schwartz, D; Hajek-Rosenmayr, A

    1987-02-20

    Analysis of the results of mixed lymphocyte culture (MLC) for compatibility testing preceding transplantation of bone marrow and other organs has so far required a vast input, both in terms of laboratory staff and work hours. We have developed a computer programme which performs this work rapidly. Graphics of the reaction patterns can be obtained, moreover, and these can prove a helpful tool in interpretation of the results.

  9. Creating a computer-assisted learning module for the non-expert nephrology nurse.

    Science.gov (United States)

    Dennison, Hazel A

    2011-01-01

    The development of computer-assisted learning for the nephrology nurse allows the nurse to absorb information at a comfortable pace and gain knowledge in a safe environment. A computer-assisted learning module on dialysis complications that focused on the nonexpert nephrology nurse was created to determine if non-expert nephrology nurses gained knowledge of dialysis complications and if there is acceptance of this type of learning in the nephrology environment. An improvement of more than 20% was noted between the pre- to post-test scores of the non-expert nephrology nurse after reviewing the module. The results of this study indicate that computer-assisted learning can be an effective strategy in the education of nephrology nurses.

  10. An Auditory BCI System for Assisting CRS-R Behavioral Assessment in Patients with Disorders of Consciousness

    Science.gov (United States)

    Xiao, Jun; Xie, Qiuyou; He, Yanbin; Yu, Tianyou; Lu, Shenglin; Huang, Ningmeng; Yu, Ronghao; Li, Yuanqing

    2016-09-01

    The Coma Recovery Scale-Revised (CRS-R) is a consistent and sensitive behavioral assessment standard for disorders of consciousness (DOC) patients. However, the CRS-R has limitations due to its dependence on behavioral markers, which has led to a high rate of misdiagnosis. Brain-computer interfaces (BCIs), which directly detect brain activities without any behavioral expression, can be used to evaluate a patient’s state. In this study, we explored the application of BCIs in assisting CRS-R assessments of DOC patients. Specifically, an auditory passive EEG-based BCI system with an oddball paradigm was proposed to facilitate the evaluation of one item of the auditory function scale in the CRS-R - the auditory startle. The results obtained from five healthy subjects validated the efficacy of the BCI system. Nineteen DOC patients participated in the CRS-R and BCI assessments, of which three patients exhibited no responses in the CRS-R assessment but were responsive to auditory startle in the BCI assessment. These results revealed that a proportion of DOC patients who have no behavioral responses in the CRS-R assessment can generate neural responses, which can be detected by our BCI system. Therefore, the proposed BCI may provide more sensitive results than the CRS-R and thus assist CRS-R behavioral assessments.

  11. Magic in the machine: a computational magician's assistant

    Directory of Open Access Journals (Sweden)

    Howard eWilliams

    2014-11-01

    Full Text Available A human magician blends science, psychology and performance to create a magical effect. In this paper we explore what can be achieved when that human intelligence is replaced or assisted by machine intelligence. Magical effects are all in some form based on hidden mathematical, scientific or psychological principles; often the parameters controlling these underpinning techniques are hard for a magician to blend to maximise the magical effect required. The complexity is often caused by interacting and often conflicting physical and psychological constraints that need to be optimally balanced. Normally this tuning is done by trial and error, combined with human intuitions. Here we focus on applying Artificial Intelligence methods to the creation and optimisation of magic tricks exploiting mathematical principles. We use experimentally derived data about particular perceptual and cognitive features, combined with a model of the underlying mathematical process to provide a psychologically valid metric to allow optimisation of magical impact. In the paper we introduce our optimisation methodology and describe how it can be flexibly applied to a range of different types of mathematics based tricks. We also provide two case studies as exemplars of the methodology at work: a magical jigsaw, and a mind reading card trick effect. We evaluate each trick created through testing in laboratory and public performances, and further demonstrate the real world efficacy of our approach for professional performers through sales of the tricks in a reputable magic shop in London.

  12. Magic in the machine: a computational magician's assistant.

    Science.gov (United States)

    Williams, Howard; McOwan, Peter W

    2014-01-01

    A human magician blends science, psychology, and performance to create a magical effect. In this paper we explore what can be achieved when that human intelligence is replaced or assisted by machine intelligence. Magical effects are all in some form based on hidden mathematical, scientific, or psychological principles; often the parameters controlling these underpinning techniques are hard for a magician to blend to maximize the magical effect required. The complexity is often caused by interacting and often conflicting physical and psychological constraints that need to be optimally balanced. Normally this tuning is done by trial and error, combined with human intuitions. Here we focus on applying Artificial Intelligence methods to the creation and optimization of magic tricks exploiting mathematical principles. We use experimentally derived data about particular perceptual and cognitive features, combined with a model of the underlying mathematical process to provide a psychologically valid metric to allow optimization of magical impact. In the paper we introduce our optimization methodology and describe how it can be flexibly applied to a range of different types of mathematics based tricks. We also provide two case studies as exemplars of the methodology at work: a magical jigsaw, and a mind reading card trick effect. We evaluate each trick created through testing in laboratory and public performances, and further demonstrate the real world efficacy of our approach for professional performers through sales of the tricks in a reputable magic shop in London.

  13. Computer-Assisted 3D Structure Elucidation of Natural Products using Residual Dipolar Couplings.

    Science.gov (United States)

    Troche-Pesqueira, Eduardo; Anklin, Clemens; Gil, Roberto R; Navarro-Vázquez, Armando

    2017-03-20

    An enhanced computer-assisted procedure for the determination of the relative configuration of natural products, which starts from the molecular formula and uses a combination of conventional 1D and 2D NMR spectra, and residual dipolar couplings (RDCs), is reported. Having already the data acquired (1D/2D NMR and RDCs), the procedure begins with the determination of the molecular constitution using standard computer-assisted structure elucidation (CASE) and is followed by fully automated determination of relative configuration through RDC analysis. In the case of moderately flexible molecules the simplest data-explaining conformational model is selected by the use of the Akaike information criterion.

  14. A novel computer-assisted surgical technique for revision total knee arthroplasty.

    Science.gov (United States)

    Marcacci, Maurilio; Nofrini, Laura; Iacono, Francesco; Di Martino, Alessandro; Bignozzi, Simone; Lo Presti, Mirco

    2007-12-01

    Revision total knee arthroplasty (RTKA) is a skill-demanding intervention presenting several technical challenges to the surgeon due to bone deficiencies and lack of anatomical references. Computer-assisted navigation systems can potentially solve these problems. An innovative computer-assisted surgical technique for RTKA is presented. The system is image free. Based on anatomical landmarks acquired on the patient, the system automatically plans the intervention, and provides the surgeon with tools to analyse and modify the proposed plan and to accurately reproduce it on the patient. Although we performed few cases with this navigated procedure, early results obtained demonstrated to be very promising.

  15. [Computer-assisted navigation in orthognathic surgery. Application to Le Fort I osteotomy.

    Science.gov (United States)

    Benassarou, M; Benassarou, A; Meyer, C

    2013-08-05

    Computer-assisted navigation is a tool that allows the surgeon to reach intraoperatively a previously defined target. This technique can be applied to the positioning of bone fragments in orthognathic surgery. It is not used routinely yet because there are no specifically dedicated systems available on the market for this kind of surgery. The goal of our study was to describe the various systems that could be used in orthognathic surgery and to report our experience of computer-assisted surgery in the positioning of the maxilla during maxillomandibular osteotomies.

  16. Computer-assisted quality assurance for radiographic equipment.

    Science.gov (United States)

    Glaze, S; Schneiders, N; Archer, B; Bushong, S

    1980-01-01

    A quality assurance procedure which includes a computer program has been implemented to facilitate measurement of some of the parameters normally tested on diagnostic radiographic equipment. These include: reproducibility of output, linearity of mA settings, filtration, kVp calibration, timer error, SID indication, light field--x-ray field coincidence and effective focal spot size. The user may omit those sections which are not applicable to his needs. Full use is made of the data reducing the number of field measurements needed.

  17. Computer Assisted Circulation Control at Health Sciences Library SUNYAB

    Directory of Open Access Journals (Sweden)

    Jean K. Miller

    1972-06-01

    Full Text Available A description of the circulation system which the Health Sciences Library at the State University of New York at Buffalo has been using since October 1970. Features of the system include automatic production of overdue, fine, and billing notices; notices for call-in of requested books; and book availability notices. Remote operation and processing on the IBM 360/40 and CDC 6400 computer are accomplished via the Administrative Terminal System (ATS and Terminal job Entry (T]E. The system provides information for management of the collection and improved service to the user.

  18. A systematic review of computer-assisted learning in endodontics education.

    Science.gov (United States)

    Al-Jewair, Thikriat S; Qutub, Akram F; Malkhassian, Gevik; Dempster, Laura J

    2010-06-01

    Results of the efficacy and time efficiency of computer-assisted learning (CAL) in endodontics education are mixed in the literature. The objectives of this study were to compare the efficacy and time efficiency of CAL with traditional learning methods or no instruction. The search strategy included electronic and manual searches of randomized controlled trials (RCTs) completed in English up to June 2009. The intervention comprised any method of CAL, while the control group consisted of all traditional methods of instruction including no further instructions. Various outcome measures of CAL efficacy were considered and were categorized using Kirkpatrick's four-level model of evaluation: reaction, learning, behavior, results, with the addition of return on investment as a fifth level. The time efficiency of CAL was measured by the time spent on the learning material and the number of cases covered in a unit period. Seven RCTs met the inclusion criteria. Overall, students' attitudes were varied towards CAL. Results from the knowledge gain outcome were mixed. No conclusions can be made about students' performance on clinical procedures or cost-effectiveness of CAL. Better time efficiency was achieved using CAL compared to traditional methods. CAL is as efficacious as traditional methods in improving knowledge. There is some evidence to suggest that CAL is time efficient compared to traditional methods. Overall, the number of studies included in this review was small, thus warranting the need for more studies in this area and the exploration of various CAL techniques.

  19. Etiological Risk Factors for Sibling Incest: Data From an Anonymous Computer-Assisted Self-Interview.

    Science.gov (United States)

    Griffee, Karen; Swindell, Sam; O'Keefe, Stephen L; Stroebel, Sandra S; Beard, Keith W; Kuo, Shih-Ya; Stroupe, Walter

    2016-10-01

    Retrospective data from 1,821 women and 1,064 men with one or more siblings, provided anonymously using a computer-assisted self-interview, were used to identify risk factors for sibling incest (SI); 137 were participants in SI. In order of decreasing predictive power, the risk factors identified by the multiple logistic regression analysis included ever having shared a bed for sleeping with a sibling, parent-child incest (PCI), family nudity, low levels of maternal affection, and ever having shared a tub bath with a sibling. The results were consistent with the idea that SI in many families was the cumulative result of four types of parental behaviors: (a) factors that lower external barriers to sexual behavior (e.g., permitting co-sleeping or co-bathing of sibling dyads), (b) factors that encourage nudity of children within the nuclear family and permit children to see the parent's genitals, (c) factors that lead to the siblings relying on one another for affection (e.g., diminished maternal affection), and (d) factors that eroticize young children (e.g., child sexual abuse [CSA] by a parent). Thirty-eight of the 137 SI participants were participants in coerced sibling incest (CSI). In order of decreasing predictive power, risk factors for CSI identified by multiple logistic regression analysis included ever having shared a bed for sleeping with a brother, PCI, witnessing parental physical fighting, and family nudity. SI was more likely to have been reported as CSI if the sibling had touched the reporting sibling's genitals, and less likely to have been reported as CSI if the siblings had shared a bed.

  20. Visual Analysis of Cloud Computing Performance Using Behavioral Lines.

    Science.gov (United States)

    Muelder, Chris; Zhu, Biao; Chen, Wei; Zhang, Hongxin; Ma, Kwan-Liu

    2016-02-29

    Cloud computing is an essential technology to Big Data analytics and services. A cloud computing system is often comprised of a large number of parallel computing and storage devices. Monitoring the usage and performance of such a system is important for efficient operations, maintenance, and security. Tracing every application on a large cloud system is untenable due to scale and privacy issues. But profile data can be collected relatively efficiently by regularly sampling the state of the system, including properties such as CPU load, memory usage, network usage, and others, creating a set of multivariate time series for each system. Adequate tools for studying such large-scale, multidimensional data are lacking. In this paper, we present a visual based analysis approach to understanding and analyzing the performance and behavior of cloud computing systems. Our design is based on similarity measures and a layout method to portray the behavior of each compute node over time. When visualizing a large number of behavioral lines together, distinct patterns often appear suggesting particular types of performance bottleneck. The resulting system provides multiple linked views, which allow the user to interactively explore the data by examining the data or a selected subset at different levels of detail. Our case studies, which use datasets collected from two different cloud systems, show that this visual based approach is effective in identifying trends and anomalies of the systems.

  1. Computing environment for the ASSIST data warehouse at Lawrence Livermore National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Shuk, K.

    1995-11-01

    The current computing environment for the ASSIST data warehouse at Lawrence Livermore National Laboratory is that of a central server that is accessed by a terminal or terminal emulator. The initiative to move to a client/server environment is strong, backed by desktop machines becoming more and more powerful. The desktop machines can now take on parts of tasks once run entirely on the central server, making the whole environment computationally more efficient as a result. Services are tasks that are repeated throughout the environment such that it makes sense to share them; tasks such as email, user authentication and file transfer are services. The new client/;server environment needs to determine which services must be included in the environment for basic functionality. These services then unify the computing environment, not only for the forthcoming ASSIST+, but for Administrative Information Systems as a whole, joining various server platforms with heterogeneous desktop computing platforms.

  2. Computer-assisted optics teaching at the Moscow Institute of Physics and Technology

    Science.gov (United States)

    Soboleva, Natalia N.; Kozel, Stanislav M.; Lockshin, Gennady R.; Entin, M. A.; Galichsky, K. V.; Lebedinsky, P. L.; Zhdanovich, P. M.

    1995-10-01

    Traditional methods used in optics teaching lack clarity and vividness when illustrating abstract notions such as polarization or interference. Here's where computer models may help, but they usually show only a single phenomenon or process and don't let the student see the entire picture. For this reason at Moscow Institute of Physics and Technology was developed the courseware 'Wave Optics on the Computer' consisting of a number of related simulations. It is intended for students studying optics at the Universities. Recently we have developed different simulations in optics for secondary school level. They are included as part of large computer courseware 'Physics by Pictures'. The courseware 'Wave Optics on the Computer' consists of nine large simulation programs and the textbook. The programs are simulating basic phenomena of wave optics. parameters of optical systems can be varied by the user. The textbook contains theoretical considerations on studied optical phenomena, recommendations concerning work with computer programs, and, especially for those wishing to deeper understand wave optics, original problems for individual solution. At the Moscow Institute of Physics and Technology the course 'Wave Optics on the Computer' is used for teaching optics in the course of general physics. The course provides both the computer assisted teaching for lectures support and computer assisted learning for students during seminars in the computer classroom.

  3. Selecting a computer-assisted retrieval system: one answer to office automation.

    Science.gov (United States)

    Bogue, D T

    1983-11-01

    Computer-assisted retrieval (CAR) systems combine computers with microfilm to create a cost-effective, productive method of managing information. CAR systems range in size from large computerized mass-storage systems utilizing image scanning and digitized technologies to small, tabletop, standalone microprocessor-driven systems. When properly configured, a CAR system can not only provide vital information today, but will also be able to grow and expand into a total office system.

  4. Computer-generated ovaries to assist follicle counting experiments.

    Directory of Open Access Journals (Sweden)

    Angelos Skodras

    Full Text Available Precise estimation of the number of follicles in ovaries is of key importance in the field of reproductive biology, both from a developmental point of view, where follicle numbers are determined at specific time points, as well as from a therapeutic perspective, determining the adverse effects of environmental toxins and cancer chemotherapeutics on the reproductive system. The two main factors affecting follicle number estimates are the sampling method and the variation in follicle numbers within animals of the same strain, due to biological variability. This study aims at assessing the effect of these two factors, when estimating ovarian follicle numbers of neonatal mice. We developed computer algorithms, which generate models of neonatal mouse ovaries (simulated ovaries, with characteristics derived from experimental measurements already available in the published literature. The simulated ovaries are used to reproduce in-silico counting experiments based on unbiased stereological techniques; the proposed approach provides the necessary number of ovaries and sampling frequency to be used in the experiments given a specific biological variability and a desirable degree of accuracy. The simulated ovary is a novel, versatile tool which can be used in the planning phase of experiments to estimate the expected number of animals and workload, ensuring appropriate statistical power of the resulting measurements. Moreover, the idea of the simulated ovary can be applied to other organs made up of large numbers of individual functional units.

  5. Using tablet assisted Social Stories™ to improve classroom behavior for adolescents with intellectual disabilities.

    Science.gov (United States)

    Kim, Mi-Seon; Blair, Kwang-Sun Cho; Lim, Kyoung-Won

    2014-09-01

    The present study examined the use of tablet assisted Social Stories™ intervention for three high school students with severe intellectual disabilities whose problem behavior interfered with their learning and caused classroom disruptions. A multiple probe design across participants was employed to test the impact of the tablet assisted SS on the participants' target behaviors. During intervention, the participants read the Social Stories that were created on Prezi and accessed via Quick Response (QR) codes using a Galaxy Tap smart tablet before participating in an academic period. Data indicated that the SS intervention decreased disruptive behavior and increased academic engagement in all three participants. All three demonstrated generalization of behaviors to a nontargeted academic period and maintenance of improved behaviors at the 2-week follow-up.

  6. Receptivity toward Assistive Computer Technology by Non-Users Who Are Blind/Visually Impaired

    Science.gov (United States)

    Leff, Lisa

    2012-01-01

    The non-use of assistive computer technology by some people who are legallyblind/visually-impaired was investigated to determine the reasons for lack of interest (Chiang, Cole, Gupta, Kaiser, & Starren, 2006; Williamson, Wright, Schauder & Bow, 2001). Social and psychological factors implicated in non-interest were determined by profiling…

  7. The Impact of Computer Assisted Grammar Teaching on EFL Pupils' Performance in Jordan

    Science.gov (United States)

    Abu Naba'h, Abdallah M.

    2012-01-01

    This study aimed at investigating the impact of using computer assisted grammar teaching on the performance of Jordanian pupils studying English as a foreign language. The sample of the study consisted of (212) secondary pupils distributed randomly on four experimental groups and four control groups. To find out the impact of a software program on…

  8. Contact-2: A computer-assisted instructional strategy for promoting conceptual change

    NARCIS (Netherlands)

    Biemans, H.J.A.; Simons, P.R.J.

    1996-01-01

    Previous research seems to support the assumption that students need instructional guidance to activate and correct their preconceptions. Such an instructional strategy is the CONTACT strategy, characterised by continuous, computer-assisted activation of the conceptions of individual learners. Our p

  9. Computer-Assisted Foreign Language Instruction: Task Based vs. Form Focused

    Science.gov (United States)

    Arslanyilmaz, A.

    2013-01-01

    The purpose of this article is twofold: to describe a prototype for a computer-assisted task-based language instruction (CATBI) tool designed and developed for Turkish as a Foreign Language, and to report on the effectiveness of the CATBI tool. More specifically, this work discusses an experimental study that examined the role of teaching approach…

  10. Effects of Computer-Assisted Jigsaw II Cooperative Learning Strategy on Physics Achievement and Retention

    Science.gov (United States)

    Gambari, Isiaka Amosa; Yusuf, Mudasiru Olalere

    2016-01-01

    This study investigated the effects of computer-assisted Jigsaw II cooperative strategy on physics achievement and retention. The study also determined how moderating variables of achievement levels as it affects students' performance in physics when Jigsaw II cooperative learning is used as an instructional strategy. Purposive sampling technique…

  11. Applying Computer-Assisted Musical Instruction to Music Appreciation Course: An Example with Chinese Musical Instruments

    Science.gov (United States)

    Lou, Shi-Jer; Guo, Yuan-Chang; Zhu, Yi-Zhen; Shih, Ru-Chu; Dzan, Wei-Yuan

    2011-01-01

    This study aims to explore the effectiveness of computer-assisted musical instruction (CAMI) in the Learning Chinese Musical Instruments (LCMI) course. The CAMI software for Chinese musical instruments was developed and administered to 228 students in a vocational high school. A pretest-posttest non-equivalent control group design with three…

  12. Computer-Assisted Techniques to Enhance Transformative Learning in First-Year Literature Courses.

    Science.gov (United States)

    Jamieson, Marguerite; Kajs, Rebecca; Agee, Anne

    1996-01-01

    Illustrates techniques to foster transformative learning in computer-assisted literature classes: (1) a lesson plan on John Donne's "A Valediction: Forbidding Mourning"; (2) a plan to analyze "Oedipus Rex" using the "Daedalus" Interactive Writing Environment; and (3) a demonstration of how students engage in "meta-reflection" as they explore…

  13. Learning to use a word processor with concurrent computer-assisted instruction

    NARCIS (Netherlands)

    Simons, P.R.J.; Biemans, H.J.A.

    1992-01-01

    In this study the effects of 7embedding regulation questions and regulation hints in a concurrent computer-assisted instruction (CAI) program aimed at learning to use a word processor were examined. This instructional shell WP-DAGOGUE controlled the interaction between the subject and the word proce

  14. A Mathematical Model for Project Planning and Cost Analysis in Computer Assisted Instruction.

    Science.gov (United States)

    Fitzgerald, William F.

    Computer-assisted instruction (CAI) has become sufficiently widespread to require attention to the relationships between its costs, administration and benefits. Despite difficulties in instituting them, quantifiable cost-effectiveness analyses offer several advantages. They allow educators to specify with precision anticipated instructional loads,…

  15. Environmental Factors Affecting Computer Assisted Language Learning Success: A Complex Dynamic Systems Conceptual Model

    Science.gov (United States)

    Marek, Michael W.; Wu, Wen-Chi Vivian

    2014-01-01

    This conceptual, interdisciplinary inquiry explores Complex Dynamic Systems as the concept relates to the internal and external environmental factors affecting computer assisted language learning (CALL). Based on the results obtained by de Rosnay ["World Futures: The Journal of General Evolution", 67(4/5), 304-315 (2011)], who observed…

  16. 77 FR 48045 - Supplemental Nutrition Assistance Program: Disqualified Recipient Reporting and Computer Matching...

    Science.gov (United States)

    2012-08-13

    ... / Monday, August 13, 2012 / Rules and Regulations#0;#0; ] DEPARTMENT OF AGRICULTURE Food and Nutrition Service 7 CFR Parts 272 and 273 RIN 0584-AB51 Supplemental Nutrition Assistance Program: Disqualified Recipient Reporting and Computer Matching Requirements AGENCY: Food and Nutrition Service, USDA....

  17. Use of a Computer-Assisted Program to Improve Metacognition in Persons with Severe Intellectual Disabilities

    Science.gov (United States)

    Moreno, Javier; Saldana, David

    2005-01-01

    Metacognition and self-regulation are processes extremely relevant to education of persons with intellectual disabilities. They play a central role in specific limitations, such as outer-directedness and lack of strategy transfer, and are related to desirable educational objectives such as self-determination. Although computer-assisted training…

  18. The Relationship between Second Language Acquisition Theory and Computer-Assisted Language Learning

    Science.gov (United States)

    Chapelle, Carol A.

    2009-01-01

    The point of departure for this article is the contrast between the theoretical landscape within view of language teaching professionals in 1991 and that of today. I argue that the pragmatic goal of computer-assisted language learning (CALL) developers and researchers to create and evaluate learning opportunities pushes them to consider a variety…

  19. Promoting Contextual Vocabulary Learning through an Adaptive Computer-Assisted EFL Reading System

    Science.gov (United States)

    Wang, Y.-H.

    2016-01-01

    The study developed an adaptive computer-assisted reading system and investigated its effect on promoting English as a foreign language learner-readers' contextual vocabulary learning performance. Seventy Taiwanese college students were assigned to two reading groups. Participants in the customised reading group read online English texts, each of…

  20. Effectiveness of Computer-Assisted STAD Cooperative Learning Strategy on Physics Problem Solving, Achievement and Retention

    Science.gov (United States)

    Gambari, Amosa Isiaka; Yusuf, Mudasiru Olalere

    2015-01-01

    This study investigated the effectiveness of computer-assisted Students' Team Achievement Division (STAD) cooperative learning strategy on physics problem solving, students' achievement and retention. It also examined if the student performance would vary with gender. Purposive sampling technique was used to select two senior secondary schools…

  1. Persistence of Learning Gains from Computer Assisted Learning: Experimental Evidence from China

    Science.gov (United States)

    Mo, D.; Zhang, L.; Wang, J.; Huang, W.; Shi, Y.; Boswell, M.; Rozelle, S.

    2015-01-01

    Computer assisted learning (CAL) programs have been shown to be effective in improving educational outcomes. However, the existing studies on CAL have almost all been conducted over a short period of time. There is very little evidence on how the impact evolves over time. In response, we conducted a clustered randomized experiment involving 2741…

  2. Educational Technology Research Journals: "Journal of Computer Assisted Learning," 2002-2011

    Science.gov (United States)

    Welch, Kyle R.; Zabriskie, Grant D.; Ashton, Scott M.; Borup, Jered; West, Richard E.

    2014-01-01

    In this study, the authors analyzed all research articles published between 2002 and 2011 in the "Journal of Computer Assisted Learning," in order to understand the research topics methods, major contributing authors, and most-cited publications. Over the 10-year period, they found the journal has explored educational uses of computer…

  3. Listening Strategy Use and Influential Factors in Web-Based Computer Assisted Language Learning

    Science.gov (United States)

    Chen, L.; Zhang, R.; Liu, C.

    2014-01-01

    This study investigates second and foreign language (L2) learners' listening strategy use and factors that influence their strategy use in a Web-based computer assisted language learning (CALL) system. A strategy inventory, a factor questionnaire and a standardized listening test were used to collect data from a group of 82 Chinese students…

  4. Secondary School Mathematics Teachers' and Students' Views on Computer Assisted Mathematics Instruction in Turkey: Mathematica Example

    Science.gov (United States)

    Ardiç, Mehmet Alper; Isleyen, Tevfik

    2017-01-01

    This study aimed at determining the secondary school mathematics teachers' and students' views on computer-assisted mathematics instruction (CAMI) conducted via Mathematica. Accordingly, three mathematics teachers in Adiyaman and nine 10th-grade students participated in the research. Firstly, the researchers trained the mathematics teachers in the…

  5. Computer-Assisted Evaluation of Speaking Competencies in the Basic Speech Course.

    Science.gov (United States)

    Sawyer, Chris R.; Behnke, Ralph R.

    2001-01-01

    Addresses concerns when a college-level course utilizes a number of instructors and sections. Notes the importance of the various sections receiving essentially the same educational experience. Describes section variation trends. Discusses use of the computer assisted speech evaluation software at Texas Christian University. Recommends the use of…

  6. Secondary School Students' Attitudes towards Mathematics Computer--Assisted Instruction Environment in Kenya

    Science.gov (United States)

    Mwei, Philip K.; Wando, Dave; Too, Jackson K.

    2012-01-01

    This paper reports the results of research conducted in six classes (Form IV) with 205 students with a sample of 94 respondents. Data represent students' statements that describe (a) the role of Mathematics teachers in a computer-assisted instruction (CAI) environment and (b) effectiveness of CAI in Mathematics instruction. The results indicated…

  7. Moderators of Efficacy for a Computer-Assisted Career Guidance System (CACGS) Intervention

    Science.gov (United States)

    McLaren, Molly Rae

    2013-01-01

    Research investigating career intervention efficacy has inadequately investigated the identification of important client factors which might moderate the effects of various career interventions. The current study had two aims. First it examined the efficacy of a newly developed Computer-Assisted Career Guidance System (CACGS) used alone, and the…

  8. A PERT/CPM of the Computer Assisted Completion of The Ministry September Report. Research Report.

    Science.gov (United States)

    Feeney, J. D.

    Using two statistical analysis techniques (the Program Evaluation and Review Technique and the Critical Path Method), this study analyzed procedures for compiling the required yearly report of the Metropolitan Separate School Board (Catholic) of Toronto, Canada. The computer-assisted analysis organized the process of completing the report more…

  9. Application of computer-assisted semen analysis to explain variations in pig fertility.

    NARCIS (Netherlands)

    Broekhuijse, M.L.W.J.; Sostaric, E.; Feitsma, H.; Gadella, B.M.

    2012-01-01

    Sperm quality is often evaluated through computer-assisted semen analysis (CASA) and is an indicator of boar fertility. The aim of this research was to study the relationship between CASA motility parameters and fertility results in pigs. Insemination records and semen parameters from a total of 45,

  10. A Compilation of Postgraduate Theses Written in Turkey on Computer Assisted Instruction in Chemistry Education

    Science.gov (United States)

    Bozdogan, Aykut Emre; Demirbas, Murat

    2014-01-01

    The purpose of the study conducted is to present in-depth information about the postgraduate theses written within the context of Computer Assisted Instruction in Chemistry Education in Turkey. The theses collected in National Thesis Centre of Turkish Council of Higher Education were examined. As a result of an examination, it was found that about…

  11. A Longitudinal Evaluation of Computer-Assisted Instruction on Contraception for College Students.

    Science.gov (United States)

    Reis, Janet; Tymchyshyn, Patricia

    1992-01-01

    Assessed changes in contraceptive knowledge of 58 white female undergraduate students following computer-assisted instruction program on contraception. At six-month follow-up, students evidenced knowledge gains on duration of pill use, rationale for triphasics and biphasics, appropriate contingencies for missing two days of pill, danger signs…

  12. The Effect of Adaptive Confidence Strategies in Computer-Assisted Instruction on Learning and Learner Confidence

    Science.gov (United States)

    Warren, Richard Daniel

    2012-01-01

    The purpose of this research was to investigate the effects of including adaptive confidence strategies in instructionally sound computer-assisted instruction (CAI) on learning and learner confidence. Seventy-one general educational development (GED) learners recruited from various GED learning centers at community colleges in the southeast United…

  13. Development and Evaluation of Computer Assisted Instruction for Navy Electronics Training. Two, Inductance.

    Science.gov (United States)

    Hurlock, Richard E.

    A computer-assisted instruction (CAI) curriculum module covering the area of electrical inductance was developed and evaluated. This module was a part of a program in which a series of CAI modules are being developed and tested for a Navy training course in basic electronics. After the module was written, it was given three tryout tests.…

  14. A Comparison of Computer-Assisted Instruction and Tutorials in Hematology and Oncology.

    Science.gov (United States)

    Garrett, T. J.; And Others

    1987-01-01

    A study comparing the effectiveness of computer-assisted instruction (CAI) and small group instruction found no significant difference in medical student achievement in oncology but higher achievement through small-group instruction in hematology. Students did not view CAI as more effective, but saw it as a supplement to traditional methods. (MSE)

  15. Computer Assisted Instruction in Mathematics Can Improve Students' Test Scores: A Study.

    Science.gov (United States)

    Brown, Frank

    This research assessed the academic impact of a computer-assisted instructional (CAI) software program to teach mathematics. The research hypothesis states that the use of the CAI program will produce superior academic achievement in mathematics for students who use the program compared to students instructed in mathematics without the program.…

  16. Variables that Affect Math Teacher Candidates' Intentions to Integrate Computer-Assisted Mathematics Education (CAME)

    Science.gov (United States)

    Erdogan, Ahmet

    2010-01-01

    Based on Social Cognitive Carier Theory (SCCT) (Lent, Brown, & Hackett, 1994, 2002), this study tested the effects of mathematics teacher candidates' self-efficacy in, outcome expectations from, and interest in CAME on their intentions to integrate Computer-Assisted Mathematics Education (CAME). While mathematics teacher candidates' outcome…

  17. Improving English Pronunciation through Computer-Assisted Programs in Jordanian Universities

    Science.gov (United States)

    Al-Qudah, Fatima Zaki Mohammad

    2012-01-01

    The purpose of this research is to investigate the effect of using computer- assisted programs for teaching English pronunciation on students' performance in English Language pronunciation in Jordanian universities. To achieve the purpose of the study, a pre/post-test was constructed to measure students' level in English pronunciation. The sample…

  18. The pedagogical effectiveness of ASR-based computer assisted pronunciation training

    NARCIS (Netherlands)

    Neri, A.

    2007-01-01

    Computer Assisted Pronunciation Training (CAPT) systems with Automatic Speech Recognition (ASR) technology have become increasingly popular to train pronunciation in the second language (L2). The advantage of these systems is the provision of a self-paced, stress-free type of training with automatic

  19. Teaching Pronunciation with Computer Assisted Pronunciation Instruction in a Technological University

    Science.gov (United States)

    Liu, Sze-Chu; Hung, Po-Yi

    2016-01-01

    The purpose of this study is to evaluate the effectiveness of computer assisted pronunciation instruction in English pronunciation for students in vocational colleges and universities in Taiwan. The participants were fifty-one first-year undergraduate students from a technological university located in central Taiwan. The participants received an…

  20. Characteristics of an Intelligent Computer Assisted Instruction Shell with an Example in Human Physiology.

    Science.gov (United States)

    Dori, Yehudit J.; Yochim, Jerome M.

    1992-01-01

    Discusses exemplary teacher and student characteristics that can provide the base to generate an Intelligent Computer Assisted Instruction (ICAI) shell. Outlines the expertise, learning, student-model, and inference modules of an ICAI shell. Describes the development of an ICAI shell for an undergraduate course in human physiology. (33 references)…

  1. Climate Change Discourse in Mass Media: Application of Computer-Assisted Content Analysis

    Science.gov (United States)

    Kirilenko, Andrei P.; Stepchenkova, Svetlana O.

    2012-01-01

    Content analysis of mass media publications has become a major scientific method used to analyze public discourse on climate change. We propose a computer-assisted content analysis method to extract prevalent themes and analyze discourse changes over an extended period in an objective and quantifiable manner. The method includes the following: (1)…

  2. Brother-Sister Incest: Data from Anonymous Computer-Assisted Self Interviews

    Science.gov (United States)

    Stroebel, Sandra S.; O'Keefe, Stephen L.; Beard, Keith W.; Kuo, Shih-Ya; Swindell, Samuel; Stroupe, Walter

    2013-01-01

    Retrospective data were entered anonymously by 1,521 adult women using computer-assisted self interview. Forty were classified as victims of brother-sister incest, 19 were classified as victims of father-daughter incest, and 232 were classified as victims of sexual abuse by an adult other than their father before reaching 18 years of age. The…

  3. Generalization of Computer-Assisted Prosody Training: Quantitative and Qualitative Findings

    Science.gov (United States)

    Hardison, Debra M.

    2004-01-01

    Two experiments investigated the effectiveness of computer-assisted prosody training, its generalization to novel sentences and segmental accuracy, and the relationship between prosodic and lexical information in long-term memory. Experiment 1, using a pretest-posttest design, provided native English-speaking learners of French with 3 weeks of…

  4. The Accuracy of Computer-Assisted Feedback and Students' Responses to It

    Science.gov (United States)

    Lavolette, Elizabeth; Polio, Charlene; Kahng, Jimin

    2015-01-01

    Various researchers in second language acquisition have argued for the effectiveness of immediate rather than delayed feedback. In writing, truly immediate feedback is impractical, but computer-assisted feedback provides a quick way of providing feedback that also reduces the teacher's workload. We explored the accuracy of feedback from…

  5. MONTHLY VARIATION IN SPERM MOTILITY IN COMMON CARP ASSESSED USING COMPUTER-ASSISTED SPERM ANALYSIS (CASA)

    Science.gov (United States)

    Sperm motility variables from the milt of the common carp Cyprinus carpio were assessed using a computer-assisted sperm analysis (CASA) system across several months (March-August 1992) known to encompass the natural spawning period. Two-year-old pond-raised males obtained each mo...

  6. OBJECTIVE EVALUATION OF HYPERACTIVATED MOTILITY IN RAT SPERMATOZA USING COMPUTER-ASSISTED SPERM ANALYSIS (CASA)

    Science.gov (United States)

    Objective evaluation of hyperactivated motility in rat spermatozoa using computer-assisted sperm analysis.Cancel AM, Lobdell D, Mendola P, Perreault SD.Toxicology Program, University of North Carolina, Chapel Hill, NC 27599, USA.The aim of this study was t...

  7. A Computer-Assisted Multiliteracies Programme as an Alternative Approach to EFL Instruction

    Science.gov (United States)

    Lee, Kyungmee; Ardeshiri, Minoo; Cummins, Jim

    2016-01-01

    The aim of this article is to introduce a computer-assisted multiliteracies programme (CaMP) as an alternative approach to English as a Foreign Language (EFL) instruction in order to overcome the educational limitations that are inherent in most EFL settings. In a number of monolingual societies with a dominant language other than English,…

  8. The Effect of Computer Assisted Grammar Teaching on the Academic Success of Classroom Teacher Candidates

    Science.gov (United States)

    Eyup, Bircan

    2012-01-01

    The aim of this study is to determine the effect of computer assisted grammar teaching on the academic success of classroom teacher candidates. The study group consists of 2nd grade students from Karadeniz Technical University Fatih, Faculty of Education, Department of Classroom Teaching in the educational year of 2010 to 2011. Experimental…

  9. Effect of Computer-Assisted Instruction on Secondary School Students' Achievement in Ecological Concepts

    Science.gov (United States)

    Nkemdilim, Egbunonu Roseline; Okeke, Sam O. C.

    2014-01-01

    This study investigated the effects of computer-assisted instruction (CAI) on students' achievement in ecological concepts. Quasi-experimental design, specifically the pre-test post test non-equivalent control group design was adopted. The sample consisted of sixty-six (66) senior secondary year two (SS II) biology students, drawn from two…

  10. Effectiveness of Cognitive Skills-Based Computer-Assisted Instruction for Students with Disabilities: A Synthesis

    Science.gov (United States)

    Weng, Pei-Lin; Maeda, Yukiko; Bouck, Emily C.

    2014-01-01

    Computer-assisted instruction (CAI) for students with disabilities can be categorized into the following categories: visual, auditory, mobile, and cognitive skills-based CAI. Cognitive-skills based CAI differs from other types of CAI largely in terms of an emphasis on instructional design features. We conducted both systematic review of…

  11. Learning Achievement in Solving Word-Based Mathematical Questions through a Computer-Assisted Learning System

    Science.gov (United States)

    Huang, Tzu-Hua; Liu, Yuan-Chen; Chang, Hsiu-Chen

    2012-01-01

    This study developed a computer-assisted mathematical problem-solving system in the form of a network instruction website to help low-achieving second- and third-graders in mathematics with word-based addition and subtraction questions in Taiwan. According to Polya's problem-solving model, the system is designed to guide these low-achievers…

  12. The Utilization of a Computer Assisted Guidance System in Academic Advising

    Science.gov (United States)

    Pfautz, Charles Van Vleck

    2010-01-01

    Computer assisted guidance systems may adapt well to various models of academic advising, and they have the ability to address the challenge of meeting the diverse advising needs of community college students without sacrificing the integrity of academic advising (Fowkes & McWhirter, 2007). The purpose of this qualitative case study was to assess…

  13. Computer Assisted Instruction in Economics: An Approach for Illustrating General Equilibrium Concepts.

    Science.gov (United States)

    Gillespie, Robert W.

    A market exchange simulation utilizing the PLATO computer-assisted instructional system at the University of Illinois has been designed to teach students the principles of a general equilibrium system. It serves a laboratory function which supplements traditional instruction by stimulating students' interests and providing them with illustrations…

  14. Using Computer-Assisted Instruction to Build Math Fact Fluency: An Implementation Guide

    Science.gov (United States)

    Hawkins, Renee O.; Collins, Tai; Hernan, Colleen; Flowers, Emily

    2017-01-01

    Research findings support the use of computer-assisted instruction (CAI) as a curriculum supplement for improving math skills, including math fact fluency. There are a number of websites and mobile applications (i.e., apps) designed to build students' math fact fluency, but the options can become overwhelming. This article provides implementation…

  15. Automatization of Mathematics Skills via Computer-Assisted Instruction among Students with Mild Mental Handicaps.

    Science.gov (United States)

    Podell, David M.; And Others

    1992-01-01

    This evaluation study with 94 elementary students (50 with mild mental handicap) compared computer-assisted instruction (CAI) and paper-and-pencil practices in promoting automatization of basic addition and subtraction skills. Findings suggested CAI was more effective but that the students with mental handicap required more practice than…

  16. English Language Teachers' Perceptions of Computer-Assisted Language Learning

    Science.gov (United States)

    Feng, Yu Lin

    2012-01-01

    A growing number of studies have reported the potential use of computer-assisted language learning (CALL) and other types of technology for ESL and EFL students. So far, most studies on CALL have focused on CALL-classroom comparisons (Chenoweth & Murday, 2003; Chenoweth, Ushida, & Murday, 2007; Fitze, 2006; Neri, Mich, Gerosa, &…

  17. Evaluation of DILearn: An Interactive Computer-Assisted Learning Program for Drug Information.

    Science.gov (United States)

    Tunget, Cynthia L.; And Others

    1993-01-01

    Use of an interactive computer-assisted learning program to teach basic skills in obtaining drug information was investigated with 26 doctoral pharmacy students and a control group of 25 students receiving lecture instruction. Findings indicated no significant differences in short-term retention of drug information between groups and that students…

  18. Relationship between Pre-Service Music Teachers' Personality and Motivation for Computer-Assisted Instruction

    Science.gov (United States)

    Perkmen, Serkan; Cevik, Beste

    2010-01-01

    The main purpose of this study was to examine the relationship between pre-service music teachers' personalities and their motivation for computer-assisted music instruction (CAI). The "Big Five" Model of Personality served as the framework. Participants were 83 pre-service music teachers in Turkey. Correlation analysis revealed that three…

  19. Review Question Formats and Web Design Usability in Computer-Assisted Instruction

    Science.gov (United States)

    Green, Rebecca S.; Eppler, Marion A.; Ironsmith, Marsha; Wuensch, Karl L.

    2007-01-01

    We tested the effects of two embedded review question formats and the application of web design guidelines in a computer-assisted mastery learning course in developmental psychology. Students used either a branching review question format that redirected them to relevant portions of the study module after incorrect answers or a linear format that…

  20. Using a Dialogue System Based on Dialogue Maps for Computer Assisted Second Language Learning

    Science.gov (United States)

    Choi, Sung-Kwon; Kwon, Oh-Woog; Kim, Young-Kil; Lee, Yunkeun

    2016-01-01

    In order to use dialogue systems for computer assisted second-language learning systems, one of the difficult issues in such systems is how to construct large-scale dialogue knowledge that matches the dialogue modelling of a dialogue system. This paper describes how we have accomplished the short-term construction of large-scale and…

  1. Computer Assisted English Language Learning in Costa Rican Elementary Schools: An Experimental Study

    Science.gov (United States)

    Alvarez-Marinelli, Horacio; Blanco, Marta; Lara-Alecio, Rafael; Irby, Beverly J.; Tong, Fuhui; Stanley, Katherine; Fan, Yinan

    2016-01-01

    This study presents first-year findings of a 25-week longitudinal project derived from a two-year longitudinal randomized trial study at the elementary school level in Costa Rica on effective computer-assisted language learning (CALL) approaches in an English as a foreign language (EFL) setting. A pre-test-post-test experimental group design was…

  2. Computer-assisted semen analysis parameters as predictors for fertility of men from the general population

    DEFF Research Database (Denmark)

    Larsen, L; Scheike, Thomas Harder; Jensen, Tina Kold;

    2000-01-01

    The predictive value of sperm motility parameters obtained by computer-assisted semen analysis (CASA) was evaluated for the fertility of men from general population. In a prospective study with couples stopping use of contraception in order to try to conceive, CASA was performed on semen samples...

  3. Computer-Assisted Career Guidance Systems: A Part of NCDA History

    Science.gov (United States)

    Harris-Bowlsbey, JoAnn

    2013-01-01

    The first computer-assisted career planning systems were developed in the late 1960s and were based soundly on the best of career development and decision-making theory. Over the years, this tradition has continued as the technology that delivers these systems' content has improved dramatically and as they have been universally accepted as…

  4. The Application of Electroencephalography to Computer Assisted Instruction: A Conceptual Framework.

    Science.gov (United States)

    Schack, Edna O.

    This paper examines the possibility of developing a conceptual framework on which future research on the application of electroencephalography (EEG) to computer-assisted instruction (CAI) could be based. Consistent associations between EEG and cognitive functions for learning and instruction have the potential for bringing cognitivism into the…

  5. TEACHER IMMEDIACY BEHAVIORS AND PARTICIPATION IN COMPUTER MEDIATED COMMUNICATION

    Directory of Open Access Journals (Sweden)

    Mestan KUCUK

    2009-04-01

    Full Text Available Few concepts in instructional communication literature have received as much attention as teacher immediacy. However, educational communication scholars have thoroughly studied immediacy behaviors mainly in traditional classrooms and these studies are mostly related to student attitudes and learning. Thanks to some growing attempts, recent research has extended these findings to distance education. The difference of this study is to examine the relationship between teacher immediacy behaviors and participation in an online setting. Results indicated that affective and interactive indicators were the least used immediacy behaviors while cohesive indicators were mostly used by teacher in this case. Also data show that teachers’ interactive immediacy behaviors and immediate feedback determine students’ participation in asynchronous computer-mediated communication environment.

  6. Is a computer-assisted design and computer-assisted manufacturing method for mandibular reconstruction economically viable?

    Science.gov (United States)

    Tarsitano, Achille; Battaglia, Salvatore; Crimi, Salvatore; Ciocca, Leonardo; Scotti, Roberto; Marchetti, Claudio

    2016-07-01

    The design and manufacture of patient-specific mandibular reconstruction plates, particularly in combination with cutting guides, has created many new opportunities for the planning and implementation of mandibular reconstruction. Although this surgical method is being used more widely and the outcomes appear to be improved, the question of the additional cost has to be discussed. To evaluate the cost generated by the management of this technology, we studied a cohort of patients treated for mandibular neoplasms. The population was divided into two groups of 20 patients each who were undergoing a 'traditional' freehand mandibular reconstruction or a computer-aided design/computer-aided manufacturing (CAD-CAM) mandibular reconstruction. Data concerning operation time, complications, and days of hospitalisation were used to evaluate costs related to the management of these patients. The mean operating time for the CAD-CAM group was 435 min, whereas that for the freehand group was 550.5 min. The total difference in terms of average time gain was 115.5 min. No microvascular complication occurred in the CAD-CAM group; two complications (10%) were observed in patients undergoing freehand reconstructions. The mean overall lengths of hospital stay were 13.8 days for the CAD-CAM group and 17 days for the freehand group. Finally, considering that the institutional cost per minute of theatre time is €30, the money saved as a result of the time gained was €3,450. This cost corresponds approximately to the total price of the CAD-CAM surgery. In conclusion, we believe that CAD-CAM technology for mandibular reconstruction will become a widely used reconstructive method and that its cost will be covered by gains in terms of surgical time, quality of reconstruction, and reduced complications.

  7. Viscosity behavior of magnetic suspensions in fluid-assisted finishing

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Magnetic fluid-assisted finishing has been verified both theoretically and experimentally as an effective fabrication technology for optical mirrors and lenses. The purpose of this paper is to introduce a novel design of polishing tool and demonstrate the possible applications of this technology. The work includes studying the viscosity of the magnetic suspensions of micrometer-sized Carbonyl iron particles under the influence of a magnetic field. Both the cases of magnetizable suspension with and without abrasive cerium oxide particles are studied for their ensuing polishing effectiveness. Determination of material removal function is conducted using a Wyko Nat1100 interferometer. Experiments to reduce surface roughness with the proposed tool are also performed using a K9 mirror as the work-piece. Results show that the surface accuracy is improved over three times to less than 0.5 nm after two cycles of polishing.

  8. Effects of Computer-Assisted Instruction with Conceptual Change Texts on Removing the Misconceptions of Radioactivity

    Directory of Open Access Journals (Sweden)

    Ahmet YUMUŞAK

    2016-12-01

    Full Text Available Training young scientists, enabling conceptual understanding in science education is quite important. Misconception is one of the important indications for whether the concepts are understood or not. The most important educational tools to remove misconceptions are conceptual change texts. In addition, one of the important methods to remove misconceptions is computer-assisted instruction. The goal of this study is to research the effects of the use of computer-assisted instruction (CAI, conceptual change texts (CCT, computer-assisted instruction with conceptual change texts (CAI+CCT, and use of traditional teaching method (TTM on removing the misconceptions of science teacher candidates on the subject of radioactivity. Research sample was made of totally 92 students studying at four different groups of senior students in Celal Bayar University, Faculty of Education, Department of Science Education in 2011-2012 academic year. A different teaching method was used in each group. Experimental groups were randomly determined; in the first experimental group, computer-assisted instruction was used (23 students; in the second experimental group, conceptual change texts were used (23 students; in the third experimental group, computer-assisted instruction with conceptual change texts were used (23 students; and the fourth group, on which traditional education method was used, was called control group (23 students. Two-tier misconception diagnostic instrument, which was developed by the researcher, was used as data collection tool of the research. “Nonequivalent Control Groups Experimental Design” was used in this research in order to determine the efficiency of different teaching methods. Obtained data were analyzed by using SPSS 21.0. As a result of the research, it was determined that methods used on experimental groups were more successful than traditional teaching method practiced on control group in terms of removing misconceptions on

  9. Computer-assisted three-dimensional surgical planning and simulation: 3D virtual osteotomy.

    Science.gov (United States)

    Xia, J; Ip, H H; Samman, N; Wang, D; Kot, C S; Yeung, R W; Tideman, H

    2000-02-01

    A computer-assisted three-dimensional virtual osteotomy system for orthognathic surgery (CAVOS) is presented. The virtual reality workbench is used for surgical planning. The surgeon immerses in a virtual reality environment with stereo eyewear, holds a virtual "scalpel" (3D Mouse) and operates on a "real" patient (3D visualization) to obtain pre-surgical prediction (3D bony segment movements). Virtual surgery on a computer-generated 3D head model is simulated and can be visualized from any arbitrary viewing point in a personal computer system.

  10. Developing ESL Students' English Learner Autonomy Through Computer-assisted Language Learning

    Institute of Scientific and Technical Information of China (English)

    张艳

    2009-01-01

    Currently, learner autonomy becomes an influential concept in teaching and an important goal of the present view of CALL. The present paper focuses on a research of an English teaching program in an experimental class. Basically, in the experiment, computer was used in language learning, and some Interact-based activities were carried out both in and after class. Through the comparison oftbe experimental class and control class, the statistic findings and the interview show that computer is a beneficial tool for assisting language lear,ring and teaching. The implementation of computer-based activities had helped promote students' language learner autonomy.

  11. Personalized, relevance-based Multimodal Robotic Imaging and augmented reality for Computer Assisted Interventions.

    Science.gov (United States)

    Navab, Nassir; Fellow, Miccai; Hennersperger, Christoph; Frisch, Benjamin; Fürst, Bernhard

    2016-10-01

    In the last decade, many researchers in medical image computing and computer assisted interventions across the world focused on the development of the Virtual Physiological Human (VPH), aiming at changing the practice of medicine from classification and treatment of diseases to that of modeling and treating patients. These projects resulted in major advancements in segmentation, registration, morphological, physiological and biomechanical modeling based on state of art medical imaging as well as other sensory data. However, a major issue which has not yet come into the focus is personalizing intra-operative imaging, allowing for optimal treatment. In this paper, we discuss the personalization of imaging and visualization process with particular focus on satisfying the challenging requirements of computer assisted interventions. We discuss such requirements and review a series of scientific contributions made by our research team to tackle some of these major challenges.

  12. Computer assisted preoperative planning of bone fracture reduction: Simulation techniques and new trends.

    Science.gov (United States)

    Jiménez-Delgado, Juan J; Paulano-Godino, Félix; PulidoRam-Ramírez, Rubén; Jiménez-Pérez, J Roberto

    2016-05-01

    The development of support systems for surgery significantly increases the likelihood of obtaining satisfactory results. In the case of fracture reduction interventions these systems enable surgery planning, training, monitoring and assessment. They allow improvement of fracture stabilization, a minimizing of health risks and a reduction of surgery time. Planning a bone fracture reduction by means of a computer assisted simulation involves several semiautomatic or automatic steps. The simulation deals with the correct position of osseous fragments and fixation devices for a fracture reduction. Currently, to the best of our knowledge there is no computer assisted methods to plan an entire fracture reduction process. This paper presents an overall scheme of the computer based process for planning a bone fracture reduction, as described above, and details its main steps, the most common proposed techniques and their main shortcomings. In addition, challenges and new trends of this research field are depicted and analyzed.

  13. [Computer-assisted total knee arthroplasty: 12 years experience in Grenoble].

    Science.gov (United States)

    Saragaglia, Dominique

    2009-01-01

    Computer-assisted total knee arthroplasty was developed in Grenoble in the mid-1990s. The first human implantation was performed on 21 January 1997, with no particular problems. Since this date more than 200,000 patients have been implanted with our device all over the world. The device is passive (not active like a robot), and requires no pre- or perioperative imaging. It is based on kinematics and palpation, the surgeon remaining in charge at all times. The computer helps to identify the lower leg axis, to accurately fix the bone cutting guides, and to check the ligament balance. These steps are not easy to perform with conventional ancillaries. The effectiveness of computer-assisted total knee replacement is well documented, although it is too early to claim that a "well-aligned" prothesis will have a better survival rate. Long-term follow-up studies are needed, with modern prostheses, to confirm the results of historical studies.

  14. A Randomized Rounding Approach for Optimization of Test Sheet Composing and Exposure Rate Control in Computer-Assisted Testing

    Science.gov (United States)

    Wang, Chu-Fu; Lin, Chih-Lung; Deng, Jien-Han

    2012-01-01

    Testing is an important stage of teaching as it can assist teachers in auditing students' learning results. A good test is able to accurately reflect the capability of a learner. Nowadays, Computer-Assisted Testing (CAT) is greatly improving traditional testing, since computers can automatically and quickly compose a proper test sheet to meet user…

  15. Computer-Assisted Teaching and Assessment of Disabled Students in Higher Education: The Interface between Academic Standards and Disability Rights

    Science.gov (United States)

    Konur, O.

    2007-01-01

    Computer-assisted teaching and assessment has become a regular feature across many areas of the curriculum in higher education courses around the world in recent years. This development has resulted in the "digital divide" between disabled students and their nondisabled peers regarding their participation in computer-assisted courses. However,…

  16. Equivalency of Computer-Assisted and Paper-and-Pencil Administered Versions of the Minnesota Multiphasic Personality Inventory-2.

    Science.gov (United States)

    Pinsoneault, Terry B.

    1996-01-01

    Computer-assisted and paper-and-pencil-administered formats for the Minnesota Multiphasic Personality Inventories were investigated. Subjects were 32 master's and doctoral-level counseling students. Findings indicated that the two formats were comparable and that students preferred the computer-assisted format. (AEF)

  17. Pre-Service Teachers' Uses of and Barriers from Adopting Computer-Assisted Language Learning (CALL) Programs

    Science.gov (United States)

    Samani, Ebrahim; Baki, Roselan; Razali, Abu Bakar

    2014-01-01

    Success in implementation of computer-assisted language learning (CALL) programs depends on the teachers' understanding of the roles of CALL programs in education. Consequently, it is also important to understand the barriers teachers face in the use of computer-assisted language learning (CALL) programs. The current study was conducted on 14…

  18. Effects of a Computer-Assisted Concept Mapping Learning Strategy on EFL College Students' English Reading Comprehension

    Science.gov (United States)

    Liu, Pei-Lin; Chen, Chiu-Jung; Chang, Yu-Ju

    2010-01-01

    The purpose of this research was to investigate the effects of a computer-assisted concept mapping learning strategy on EFL college learners' English reading comprehension. The research questions were: (1) what was the influence of the computer-assisted concept mapping learning strategy on different learners' English reading comprehension? (2) did…

  19. Using computer-assisted learning to engage diverse learning styles in understanding business management principles.

    Science.gov (United States)

    Frost, Mary E; Derby, Dustin C; Haan, Andrea G

    2013-01-01

    Objective : Changes in small business and insurance present challenges for newly graduated chiropractors. Technology that reaches identified, diverse learning styles may assist the chiropractic student in business classes to meet course outcomes better. Thus, the purpose of our study is to determine if the use of technology-based instructional aids enhance students' mastery of course learning outcomes. Methods : Using convenience sampling, 86 students completed a survey assessing course learning outcomes, learning style, and the helpfulness of lecture and computer-assisted learning related to content mastery. Quantitative analyses occurred. Results : Although respondents reported not finding the computer-assisted learning as helpful as the lecture, significant relationships were found between pre- and post-assisted learning measures of the learning outcomes 1 and 2 for the visual and kinesthetic groups. Surprisingly, however, all learning style groups exhibited significant pre- and post-assisted learning appraisal relationships with learning outcomes 3 and 4. Conclusion : While evidence exists within the current study of a relationship between students' learning of the course content corollary to the use of technologic instructional aids, the exact nature of the relationship remains unclear.

  20. Mechanisms of defect complex formation and environmental-assisted fracture behavior of iron aluminides

    Energy Technology Data Exchange (ETDEWEB)

    Cooper, B.R.; Muratov, L.S.; Kang, B.S.J.; Li, K.Z. [West Virginia Univ., Morgantown, WV (United States)

    1997-12-01

    Iron aluminide has excellent corrosion resistance in high-temperature oxidizing-sulfidizing environments; however, there are problems at room and medium temperature with hydrogen embrittlement as related to exposure to moisture. In this research, a coordinated computational modeling/experimental study of mechanisms related to environmental-assisted fracture behavior of selected iron aluminides is being undertaken. The modeling and the experimental work will connect at the level of coordinated understanding of the mechanisms for hydrogen penetration and for loss of strength and susceptibility to fracture. The focus of the modeling component at this point is on the challenging question of accurately predicting the iron vacancy formation energy in Fe{sub 3}A{ell} and the subsequent tendency, if present, for vacancy clustering. The authors have successfully performed, on an ab initio basis, the first calculation of the vacancy formation energy in Fe{sub 3}A{ell}. These calculations include lattice relaxation effects which are quite large. This has significant implications for vacancy clustering effects with consequences to be explored for hydrogen diffusion. The experimental work at this stage has focused on the relationship of the choice and concentration of additives to the improvement of resistance to hydrogen embrittlement and hence to the fracture behavior. For this reason, comparative crack growth tests of FA-186, FA-187, and FA-189 iron aluminides (all with basic composition of Fe-28A{ell}-5Cr, at % with micro-alloying additives of Zr, C or B) under, air, oxygen, or water environment have been performed. These tests showed that the alloys are susceptible to room temperature hydrogen embrittlement in both B2 and DO{sub 3} conditions. Test results indicated that FA-187, and FA-189 are intrinsically more brittle than FA-186.

  1. Opening up to Big Data: Computer-Assisted Analysis of Textual Data in Social Sciences

    Directory of Open Access Journals (Sweden)

    Gregor Wiedemann

    2013-05-01

    Full Text Available Two developments in computational text analysis may change the way qualitative data analysis in social sciences is performed: 1. the availability of digital text worth to investigate is growing rapidly, and 2. the improvement of algorithmic information extraction approaches, also called text mining, allows for further bridging the gap between qualitative and quantitative text analysis. The key factor hereby is the inclusion of context into computational linguistic models which extends conventional computational content analysis towards the extraction of meaning. To clarify methodological differences of various computer-assisted text analysis approaches the article suggests a typology from the perspective of a qualitative researcher. This typology shows compatibilities between manual qualitative data analysis methods and computational, rather quantitative approaches for large scale mixed method text analysis designs. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1302231

  2. Modeling behavior dynamics using computational psychometrics within virtual worlds.

    Science.gov (United States)

    Cipresso, Pietro

    2015-01-01

    In case of fire in a building, how will people behave in the crowd? The behavior of each individual affects the behavior of others and, conversely, each one behaves considering the crowd as a whole and the individual others. In this article, I propose a three-step method to explore a brand new way to study behavior dynamics. The first step relies on the creation of specific situations with standard techniques (such as mental imagery, text, video, and audio) and an advanced technique [Virtual Reality (VR)] to manipulate experimental settings. The second step concerns the measurement of behavior in one, two, or many individuals focusing on parameters extractions to provide information about the behavior dynamics. Finally, the third step, which uses the parameters collected and measured in the previous two steps in order to simulate possible scenarios to forecast through computational models, understand, and explain behavior dynamics at the social level. An experimental study was also included to demonstrate the three-step method and a possible scenario.

  3. Modeling Behavior Dynamics using Computational Psychometrics within Virtual Worlds

    Directory of Open Access Journals (Sweden)

    Pietro eCipresso

    2015-11-01

    Full Text Available In case of fire in a building, how will people behave in the crowd? The behavior of each individual affects the behavior of others and, conversely, each one behaves considering the crowd as a whole and the individual others. In this article, I propose a three-step method to explore a brand new way to study behavior dynamics. The first step relies on the creation of specific situations with standard techniques (such as mental imagery, text, video and audio and an advanced technique (Virtual Reality to manipulate experimental settings. The second step concerns the measurement of behavior in one, two or many individuals focusing on parameters extractions to provide information about the behavior dynamics. Finally, the third step, which uses the parameters collected and measured in the previous two steps in order to simulate possible scenarios to forecast through computational models, understand and explain behavior dynamics at the social level. An experimental study was also included to demonstrate the three-step method and a possible scenario.

  4. Different computer-assisted sperm analysis (CASA) systems highly influence sperm motility parameters.

    Science.gov (United States)

    Boryshpolets, S; Kowalski, R K; Dietrich, G J; Dzyuba, B; Ciereszko, A

    2013-10-15

    In this study, we examined different computer-assisted sperm analysis (CASA) systems (CRISMAS, Hobson Sperm Tracker, and Image J CASA) on the exact same video recordings to evaluate the differences in sperm motility parameters related to the specific CASA used. To cover a wide range of sperm motility parameters, we chose 12-second video recordings at 25 and 50 Hz frame rates after sperm motility activation using three taxonomically distinct fish species (sterlet: Acipenser ruthenus L.; common carp: Cyprinus carpio L.; and rainbow trout: Oncorhynchus mykiss Walbaum) that are characterized by essential differences in sperm behavior during motility. Systematically higher values of velocity and beat cross frequency (BCF) were observed in video recordings obtained at 50 Hz frame frequency compared with 25 Hz for all three systems. Motility parameters were affected by the CASA and species used for analyses. Image J and CRISMAS calculated higher curvilinear velocity (VCL) values for rainbow trout and common carp at 25 Hz frequency compared with the Hobson Sperm Tracker, whereas at 50 Hz, a significant difference was observed only for rainbow trout sperm recordings. No significant difference was observed between the CASA systems for sterlet sperm motility at 25 and 50 Hz. Additional analysis of 1-second segments taken at three time points (1, 6, and 12 seconds of the recording) revealed a dramatic decrease in common carp and rainbow trout sperm speed. The motility parameters of sterlet spermatozoa did not change significantly during the 12-second motility period and should be considered as a suitable model for longer motility analyses. Our results indicated that the CASA used can affect motility results even when the same motility recordings are used. These results could be critically altered by the recording quality, time of analysis, and frame rate of camera, and could result in erroneous conclusions.

  5. Computer-assisted learning and simulation lab with 40 DentSim units.

    Science.gov (United States)

    Welk, A; Maggio, M P; Simon, J F; Scarbecz, M; Harrison, J A; Wicks, R A; Gilpatrick, R O

    2008-01-01

    There are an increasing number of studies about the computer-assisted dental patient simulator DentSim (DenX, Israel), by which dental students can acquire cognitive motor skills in a multimedia environment. However, only a very few studies have been published dealing with efficient ways to use and to manage a computer-assisted dental simulation lab with 40 DentSim units. The current approach and optimization steps of the College of Dentistry at the University of Tennessee Health Science Center were evaluated based on theoretical and practical tests and by questionnaires (partial 5-point Likert scale). Half of the D1 (first-year) students (2004/05) already had experience with computer-assisted learning at their undergraduate college and most of the students even expected to be taught via computer-assisted learning systems (83.5%) at the dental school. 87.3% of the students working with DentSim found the experience to be very interesting or interesting. Before the students carried out the preparation exercises, they were trained in the skills they needed to work with the sophisticated technology, eg, system-specific operation skills (66.6% attained maximal reachable points) and information searching skills (79.5% attained maximal reachable points). The indirect knowledge retention rate / incidental learning rate of the preparation exercises in the sense of computer-assisted problem-oriented learning regarding anatomy, preparation procedures, and cavity design was promising. The wide- ranging number of prepared teeth needed to acquire the necessary skills shows the varied individual learning curves of the students. The acceptance of, and response to, additional elective training time in the computer-assisted simulation lab were very high. Integrating the DentSim technology into the existing curriculum is a way to improve dental education, but it is also a challenge for both teachers and the students. It requires a shift in both curriculum and instructional goals that

  6. Auditors’ Usage of Computer Assisted Audit Tools and Techniques: Empirical Evidence from Nigeria

    Directory of Open Access Journals (Sweden)

    Appah Ebimobowei

    2013-06-01

    Full Text Available This study examines use of computer assisted audit tool and techniques in audit practice in the Niger Delta of Nigeria. To achieve this objective, data was collected from primary and secondary sources. The secondary sources were from scholarly books and journals while the primary source involved a well structured questionnaire of three sections of thirty seven items with an average reliability of 0.838. The data collected from the questionnaire were analyzed using relevant descriptive statistics, diagnostics tests, Augmented Dickey-fuller and multiple regressions. The result revealed that performance expectancy, effort expectancy, facilitating conditions and social influence were positively associated at (0.05 to the usage of computer assisted audit tools and techniques by accounting firms. Hence, the study concludes that the adoption of computer assisted audit tools and techniques has become a beneficial choice for auditors in the 21st century complex business environment and an efficient tool to increase the productivity as well as the audit functions. Therefore, professional accountants need to expand their knowledge of information technology and computer accounting audit methodology; the syllabus of accounting programmes for professional and tertiary institutions should be reviewed to include courses in computer accounting information system audit; relevant professional accountancy bodies in Nigeria should also include courses in computer information system audit as part of their training programmes and professional accountants should be made to appreciate the relevance of computer in the 21st century business environment in the provision of relevant accounting services for the sole aim of satisfying their clients and also audit firms need to increase their organizational and technical support to encourage the use of CAATTs.

  7. Development of oral motor behavior related to the skill assisted spoon feeding

    NARCIS (Netherlands)

    Engel-Hoek, L. van den; Hulst, K. van; Gerven, M.H.J.C van; Haaften, L. van; Groot, S.A. de

    2014-01-01

    Milestones in the typical development of eating skills are considered to be nippling (breast or bottle), eating from a spoon, drinking from a cup, biting and chewing. The purpose of this research was to study the development and consolidation of oral motor behavior related to the skill assisted spoo

  8. ASSESSMENT OF KNOWLEDGE AND ATTITUDE OF COMPUTER ASSISTED LEARNING AMONG MEDICAL STUDENTS

    Directory of Open Access Journals (Sweden)

    Ravish

    2015-12-01

    Full Text Available INTRODUCTION: It is going truth globally that the medical course in medical college students are developed via computer mediated learning.1 Utilization of both the range upon online messages options must create study exciting, monetization, and likely as hired. We Hypothesized that survey will facilitate to permit us to be able to blueprint some on this necessary condition among my medical students and also to improve our study facilities a lot of automatically. A set of closed ended problems remained displayed on departmental website, to evaluate their computer skills and talents and their own assessment in computer and internet skills helping in learning. In the beginning months of 1st year MBBS college students 2014-15 batch taken up voluntarily to the study through MCQs questions provided to them in the form of departmental website. A batch of 50 college students surveyed on 3 different days. Although 80% students were confident with the operational skills of the computer, the opinion regarding the usage of computers for web based learning activities was not uniform i.e., 55% of the participants felt uncomfortable with web assisted activity in comparison to paper based activity. However, 49% were of the opinion that paper based activity might become redundant and websites will take over books in the future. Expansion on computer-assisted study requires traditional changes as well as thoughtful strategic planning, resource giving, staff benefits, Edutainment promotion by multidisciplinary working, and efficient quality control.

  9. History of computer-assisted orthopedic surgery (CAOS) in sports medicine.

    Science.gov (United States)

    Jackson, Douglas W; Simon, Timothy M

    2008-06-01

    Computer-assisted orthopedic surgery and navigation applications have a history rooted in the desire to link imaging technology with real-time anatomic landmarks. Although applications are still evolving in the clinical and research setting, computer-assisted orthopedic surgery has already demonstrated in certain procedures its potential for improving the surgeon's accuracy, reproducibility (once past the learning curve), and in reducing outlier outcomes. It is also being used as an educational tool to assist less experienced surgeons in interpreting measurements and precision placements related to well defined anatomic landmarks. It also can assist experienced surgeons, in real-time, plan their bony cuts, tunnel placement, and with ligament balancing. Presently, the additional time, the expense to acquire the needed software and hardware, and restricted reimbursement have slowed the widespread use of navigation. Its current applications have been primarily in joint replacement surgery, spine surgery, and trauma. It has not been widely used in the clinical setting for sports medicine procedures. Sports medicine applications such as individualizing tunnel placement in ligament surgery, opening wedge osteotomy with and without accompanying ligament reconstruction, and balancing and tensioning of the ligaments during the procedure (allowing real-time corrections if necessary) are currently being evaluated and being used on a limited clinical basis.

  10. COMPUTER-ASSISTED SEMEN ANALYSIS OF RAT SPERMATOZOA AFTER AN INTRAPERITONEAL ADMINISTRATION OF INSECTICIDE DIAZINON

    Directory of Open Access Journals (Sweden)

    R. TOMAN

    2013-12-01

    Full Text Available The aim of this study was to reveal the effect of diazinon on the rat spermatozoa motility characteristics using the computer-assisted semen analysis (CASA. Motility, progressive motility, DAP, DCL, DSL, VAP, VCL, VSL, STR, LIN, WOB, ALH, and BCF after the diazinon i.p. administration of 20 mg/kg b.w. were evaluated. 36 hours after the diazinon administration, only slight decrease in VCL, DCL and increase in percentage of progressive motility in the diazinon-treated group. Significant decrease (P<0.01 was only observed in BCF in diazinon-treated group. Computer-assisted semen analysis (CASA of rat sperm motility showed that acute diazinon administration slightly affected the rat sperm motility which can be the first step in the decreased fertilization capacity caused by pesticides. Further investigation of reproductive effects of diazinon is needed.

  11. In vivo bioprinting for computer- and robotic-assisted medical intervention: preliminary study in mice.

    Science.gov (United States)

    Keriquel, Virginie; Guillemot, Fabien; Arnault, Isabelle; Guillotin, Bertrand; Miraux, Sylvain; Amédée, Joëlle; Fricain, Jean-Christophe; Catros, Sylvain

    2010-03-01

    We present the first attempt to apply bioprinting technologies in the perspective of computer-assisted medical interventions. A workstation dedicated to high-throughput biological laser printing has been designed. Nano-hydroxyapatite (n-HA) was printed in the mouse calvaria defect model in vivo. Critical size bone defects were performed in OF-1 male mice calvaria with a 4 mm diameter trephine. Prior to laser printing experiments, the absence of inflammation due to laser irradiation onto mice dura mater was shown by means of magnetic resonance imaging. Procedures for in vivo bioprinting and results obtained using decalcified sections and x-ray microtomography are discussed. Although heterogeneous, these preliminary results demonstrate that in vivo bioprinting is possible. Bioprinting may prove to be helpful in the future for medical robotics and computer-assisted medical interventions.

  12. One-Stage Computer-Assisted Total Knee Arthroplasty and Tibial Osteotomy.

    Science.gov (United States)

    Denjean, S; Chatain, F; Tayot, O

    2017-03-02

    Same-stage tibial osteotomy may deserve consideration in candidates to total knee arthroplasty (TKA) who have severe bone deformities, particularly at extra-articular sites. This strategy obviates the need for either a major and technically difficult ligament release procedure, which may compromise ligament balancing, or the use of a semi-constrained prosthesis. This technical note describes a one-stage, computer-assisted technique consisting in TKA followed by corrective tibial osteotomy to obtain an overall mechanical axis close to 180° without extensive ligament balancing. This technique provided satisfactory outcomes in 8 patients followed-up for at least 3 years, with no specific complications or ligament instability and with a hip-knee-ankle angle close to 180°. After planning, intra-operative computer assistance ensures accurate determination of both implant position and the degree of correction achieved by the osteotomy.

  13. Equivalence study of a dental anatomy computer-assisted learning program.

    Science.gov (United States)

    Bogacki, Russell E; Best, Al; Abbey, Louis M

    2004-08-01

    Tooth Morphology is a computer-assisted learning program designed to teach the anatomy of the adult dentition. The purpose of this study was to test whether Tooth Morphology could teach dental anatomy to first-year dental students as well as the traditional lecture. A randomized controlled trial was performed with forty-five first-year dental students. The students were randomly assigned to either the Tooth Morphology group (n=23), which used the computer-assisted learning program and did not attend lecture, or the lecture group (n=22), which attended the traditional lecture and did not use Tooth Morphology. The Tooth Morphology group had a final exam average of 90.0 (standard deviation=5.2), and the lecture group had a final exam average of 90.9 (sd=5.3). Analysis showed that the two groups' scores were statistically equivalent (pdental anatomy lectures.

  14. The Effects of Computer-Assisted Instruction of Simple Circuits on Experimental Process Skills

    Directory of Open Access Journals (Sweden)

    Şeyma ULUKÖK

    2013-01-01

    Full Text Available The experimental and control groups were composed of 30 sophomores majoring in Classroom Teaching for this study investigating the effects of computer-assisted instruction of simple circuits on the development of experimental process skills. The instruction includes experiments and studies about simple circuits and its elements (serial, parallel, and mixed conncetions of resistors covered in Science and Technology Laboratory II course curriculum. In this study where quantitative and qualitative methods were used together, the control list developed by the researchers was used to collect data. Results showed that experimental process skills of sophomores in experimental group were more developed than that of those in control group. Thus, it can be said that computer-assisted instruction has a positive impact on the development of experimental process skills of students.

  15. Interactive computer-assisted approach for evaluation of ultrastructural cilia abnormalities

    Science.gov (United States)

    Palm, Christoph; Siegmund, Heiko; Semmelmann, Matthias; Grafe, Claudia; Evert, Matthias; Schroeder, Josef A.

    2016-03-01

    Introduction - Diagnosis of abnormal cilia function is based on ultrastructural analysis of axoneme defects, especialy the features of inner and outer dynein arms which are the motors of ciliar motility. Sub-optimal biopsy material, methodical, and intrinsic electron microscopy factors pose difficulty in ciliary defects evaluation. We present a computer-assisted approach based on state-of-the-art image analysis and object recognition methods yielding a time-saving and efficient diagnosis of cilia dysfunction. Method - The presented approach is based on a pipeline of basal image processing methods like smoothing, thresholding and ellipse fitting. However, integration of application specific knowledge results in robust segmentations even in cases of image artifacts. The method is build hierarchically starting with the detection of cilia within the image, followed by the detection of nine doublets within each analyzable cilium, and ending with the detection of dynein arms of each doublet. The process is concluded by a rough classification of the dynein arms as basis for a computer-assisted diagnosis. Additionally, the interaction possibilities are designed in a way, that the results are still reproducible given the completion report. Results - A qualitative evaluation showed reasonable detection results for cilia, doublets and dynein arms. However, since a ground truth is missing, the variation of the computer-assisted diagnosis should be within the subjective bias of human diagnosticians. The results of a first quantitative evaluation with five human experts and six images with 12 analyzable cilia showed, that with default parameterization 91.6% of the cilia and 98% of the doublets were found. The computer-assisted approach rated 66% of those inner and outer dynein arms correct, where all human experts agree. However, especially the quality of the dynein arm classification may be improved in future work.

  16. Putting Our New Computer-Assisted Japanese and English Language Teaching Methods into Practice

    OpenAIRE

    2006-01-01

    Computer-assisted language learning (CALL) has widely been utilized in language education and frequently been written about in many professional journals. But yet, Japanese educators have written about it in their field of expertise whereas English educators have done the same in theirs ; hence, the collaboration between them has rarely been done on the topic. Here, in this article, Yoshida and Masuyama, teaching English and Japanese languages respectively, will explain how they have been uti...

  17. The Design and Application of Computer Assisted Language Learning System in Business English Writing course

    Directory of Open Access Journals (Sweden)

    Zhang Xi Wen

    2016-01-01

    Full Text Available The CALL (Computer Assisted Language Learning system is an effective method in business English writing teaching, particularly for students which are non-speaking countries. The CALLS is suited to self-learning because of the Rich scenario module design. Application results are examined by using the methods of group experiments, questionnaires, examinations and others. The CALLS is especially suited to creating a better studying atmosphere among students in the process of business English writing teaching than other methods.

  18. Effect of Integrating Computer-Assisted Language Learning in the TOEFL Performance of Nursing Students

    OpenAIRE

    Marlene R. Castillo

    2015-01-01

    The study aimed to determine the relationship between the use of a computer-assisted language learning (CALL) software and the TOEFL performance of nursing students. This descriptive study used a pre-test and post-test and a survey questionnaire to gather data. Interviews and observations were also conducted to gain further insights in the use of the software. Results indicate that for the three areas of the TOEFL model practice test, there is a statistically significant increase in the gain ...

  19. Computer-assisted coloring and illuminating based on a region-tree structure

    OpenAIRE

    Nascimento, Renata; Queiroz, Fabiane; Rocha, Allan; Ren, Tsang Ing; Mello, Vinicius; Peixoto, Adelailson

    2012-01-01

    Colorization and illumination are key processes for creating animated cartoons. Computer assisted methods have been incorporated in animation/illustration systems to reduce the artists' workload. This paper presents a new method for illumination and colorization of 2D drawings based on a region- tree representation. Starting from a hand-drawn cartoon, the proposed method extracts geometric and topological information and builds a tree structure, ensuring independence among parts of the drawin...

  20. English language learning activity using spoken language and intelligent computer-assisted technologies

    OpenAIRE

    2011-01-01

    This paper presents work in progress on language technologies applied to secondary school education. The application presented integrates several state-of-the-art technologies related to spoken language and intelligent computer-assisted language learning. We envision to show that the technology has reached a level of maturity that suggests that the time may be right to use it to second language learning. To achieve this objective, an activity was designed to be tested at several Spanish...

  1. Computer assisted proofs for nonsymmetric planar choreographies and for stability of the Eight

    Science.gov (United States)

    Kapela, Tomasz; Simó, Carles

    2007-05-01

    We present a general method to produce computer assisted proofs of the existence of choreographies in the N-body problem. This method allows us to verify rigorously numerical data from computer simulations. As an example we use it to prove the existence of nonsymmetric choreographies with six and seven bodies. The method provides estimates for the initial conditions and for the monodromy matrix of the choreography. These data are used to show linear stability of the Eight solution restricted to the plane and zero angular momentum motions.

  2. SURGETICA at Grenoble: from computer assisted medical interventions to quality inspired surgery.

    Science.gov (United States)

    Cinquin, P; Troccaz, J; Champleboux, G; Lavallee, S

    2004-01-01

    Research on "Computer Assisted Medical Interventions" (CAMI) was initiated in Grenoble in 1984, as an attempt to take up the challenge of "Minimally Invasive Interventions", thanks to the introduction of Information and Communication Techniques in the Operating Room. In a first section, we will describe our initial vision. The corresponding achievements will then be presented. A final section will show that the challenge now is to "invert this movement": instead of moving the computer in the Operating Room, we should embed the surgeon (or at least his or her expertise) into the Information Technology based tools he or she uses.

  3. Computer-Assisted Navigation During an Anterior-Posterior En Bloc Resection of a Sacral Tumor.

    Science.gov (United States)

    Al Eissa, Sami; Al-Habib, Amro F; Jahangiri, Faisal R

    2015-11-04

    Previously, a computer-based navigation system has not been used routinely for en-bloc resection of sacral tumors. In order to improve the accuracy of tumor resection, O-arm navigation was used to join anterior and posterior osteotomies during an en-bloc resection of a sacral Ewing's sarcoma. This case study describes the technique for en-bloc resection of a sacral Ewing's sarcoma guided by O-arm computer navigation and intraoperative neurophysiological monitoring (IONM). An 18-year-old male presented with weakness in his left lower extremity. MRI of the patient's spine showed a sacral mass causing compression of left S1 and S2 roots. A surgical resection was planned with anterior and posterior approaches. An O-arm computer navigation system was used to assist in meeting anterior osteotomy cuts with the posterior cuts to ensure complete resection of the sacral tumor with a safe margin. Computer-assisted navigation was used along with IONM during this procedure to help guide the surgical team in an adequate tumor resection. There were no complications related to the use of the O-arm or the navigation system. Computer navigation guidance is both useful and safe in sacral tumor resections. It enhanced the accuracy of the en-bloc removal of a sacral tumor with safe margins while protecting neural function and minimizing recurrence.

  4. The Effect of Computer Assisted Instruction Based Constructivist Learning Approach on Students’ Attitudes and Achievements

    Directory of Open Access Journals (Sweden)

    Şeyda Gül

    2011-06-01

    Full Text Available The aim of this study is to determine the effect of computer assisted instruction based constructivist learning approach on students’ attitudes towards computers and science and technology lesson and their achievements at science and technology lesson. The study group is a group of 56 students who attend to fourth grade of a public primary school which were selected via convenient sampling method from Körfez (Kocaeli. The data were collected by means of Attitude Scale to Science and Technology Lesson, Attitude Scale to Computers and Achievement Test. In this research, a quasi-experiment design with pre test-post test control group was employed. The subjects was taught to the students using constructivist learning method which carried out at present syllabus in control group and computer assisted instruction based constructivist learning approach in experimental group. The findings from this study showed that there was a statistically significant difference between groups’ post-test attitudes towards computers and post-test scores obtained from achievement test in favour of experimental group (p0.05 despite the fact that there was a positive increase at experimental groups’ attitudes.

  5. Effects of a test taking strategy on postsecondary computer assisted chemistry assessments

    Science.gov (United States)

    Manco, Sharon Ann

    Metacognitive test taking strategies have proven advantageous in improving content-based test scores in a wide variety of disciplines and age/grade levels using traditional paper-and-pencil tests. However, despite the increase in computer assisted assessment (CAA), little research has examined whether these test taking strategies are effective for computer assisted tests. Research was conducted to determine if learning a proven test taking strategy would improve the online quiz scores of six university students in an introductory chemistry course intended for science, technology, engineering and math majors. Participants completed six to ten chemistry quizzes prior to intervention---learning the test taking strategy---and four to eight chemistry quizzes after intervention. Results indicated that, while students learned the strategy, it had little effect on their online chemistry quiz scores. Additionally, at the end of the semester, participants completed a satisfaction survey indicating general satisfaction with having learned the test taking strategy and generalization to other courses and types of tests. Furthermore, results suggest that adaptations to the on-line delivery method of the quizzes and to the test taking strategies may improve the robustness of the effect. Due to the increased use of computer assisted assessment, additional research is warranted to determine appropriate test taking strategies for online tests.

  6. COMPUTER ASSISTED LEARNING: PERCEPTION AND ACCEPTABILITY OF UNDERGRADUATE MEDICAL STUDENTS IN PHARMACOLOGY EXPERIMENTS

    Directory of Open Access Journals (Sweden)

    Ravi Babu

    2015-12-01

    Full Text Available BACKGROUND According to Medical Council of India theory and practical curriculum is very essential for all medical subjects in the under-graduate medical course in India. Animal based experimental pharmacology is still being taught in many institutions in the country, though such a practice has been abandoned at many centers. However, the use of animals in research and experimentation has been debated, defended and protested by both individuals and organizations at various levels. In recent years undergraduate training in pharmacology has been revolutionized with adoptions of new methods of teaching that focus on supportive learning through novel teaching approaches like CAL (Computer Assisted Learning. OBJECTIVE To assess the student’s perception and acceptability of Computer Assisted Learning (CAL as a tool in demonstrating the drug effects in animals and to analyze feedback about advantages and disadvantages of CAL software. METHODS CAL software was used to demonstrate action of drugs in animals. Feedback was taken from students regarding their perception, acceptability, advantages and disadvantages of this tool. RESULTS More than 50% of the students opined that CAL is an effective method of teaching practical aspects of pharmacology; 88.88% of students expressed that lack of interaction with living tissues and animals is the main disadvantage. CONCLUSION Computer Assisted Learning (CAL is an excellent beneficial tool. It enhances the learning experience of the students and it is one of the alternative educational tools to demonstrate the drug effects in animals.

  7. Continuum mechanical and computational aspects of material behavior

    Energy Technology Data Exchange (ETDEWEB)

    Fried, Eliot; Gurtin, Morton E.

    2000-02-10

    The focus of the work is the application of continuum mechanics to materials science, specifically to the macroscopic characterization of material behavior at small length scales. The long-term goals are a continuum-mechanical framework for the study of materials that provides a basis for general theories and leads to boundary-value problems of physical relevance, and computational methods appropriate to these problems supplemented by physically meaningful regularizations to aid in their solution. Specific studies include the following: the development of a theory of polycrystalline plasticity that incorporates free energy associated with lattice mismatch between grains; the development of a theory of geometrically necessary dislocations within the context of finite-strain plasticity; the development of a gradient theory for single-crystal plasticity with geometrically necessary dislocations; simulations of dynamical fracture using a theory that allows for the kinking and branching of cracks; computation of segregation and compaction in flowing granular materials.

  8. Media multitasking behavior: concurrent television and computer usage.

    Science.gov (United States)

    Brasel, S Adam; Gips, James

    2011-09-01

    Changes in the media landscape have made simultaneous usage of the computer and television increasingly commonplace, but little research has explored how individuals navigate this media multitasking environment. Prior work suggests that self-insight may be limited in media consumption and multitasking environments, reinforcing a rising need for direct observational research. A laboratory experiment recorded both younger and older individuals as they used a computer and television concurrently, multitasking across television and Internet content. Results show that individuals are attending primarily to the computer during media multitasking. Although gazes last longer on the computer when compared to the television, the overall distribution of gazes is strongly skewed toward very short gazes only a few seconds in duration. People switched between media at an extreme rate, averaging more than 4 switches per min and 120 switches over the 27.5-minute study exposure. Participants had little insight into their switching activity and recalled their switching behavior at an average of only 12 percent of their actual switching rate revealed in the objective data. Younger individuals switched more often than older individuals, but other individual differences such as stated multitasking preference and polychronicity had little effect on switching patterns or gaze duration. This overall pattern of results highlights the importance of exploring new media environments, such as the current drive toward media multitasking, and reinforces that self-monitoring, post hoc surveying, and lay theory may offer only limited insight into how individuals interact with media.

  9. Gender Differences in Computer-Related Attitudes and Behavior: A Meta-Analysis.

    Science.gov (United States)

    Whitley, Bernard E., Jr.

    1997-01-01

    A meta-analysis of studies of gender differences in computer attitudes and behavior found that males exhibited greater sex-role stereotyping of computers, higher computer self-efficacy, and more positive attitudes toward computers than females. Most differences in attitudes and behavior were small, with the largest found in high school students.…

  10. A computer-assisted systematic quality monitoring method for cervical hip fracture radiography

    Directory of Open Access Journals (Sweden)

    Mats Geijer

    2016-12-01

    Full Text Available Background A thorough quality analysis of radiologic performance is cumbersome. Instead, the prevalence of missed cervical hip fractures might be used as a quality indicator. Purpose To validate a computer-based quality study of cervical hip fracture radiography. Material and Methods True and false negative and positive hip trauma radiography during 6 years was assessed manually. Patients with two or more radiologic hip examinations before surgery were selected by computer analysis of the databases. The first of two preoperative examinations might constitute a missed fracture. These cases were reviewed. Results Out of 1621 cervical hip fractures, manual perusal found 51 (3.1% false negative radiographic diagnoses. Among approximately 14,000 radiographic hip examinations, there were 27 (0.2% false positive diagnoses. Fifty-seven percent of false negative reports were occult fractures, the other diagnostic mistakes. There were no significant differences over the years. Diagnostic sensitivity was 96.9% and specificity 99.8%. Computer-assisted analysis with a time interval of at least 120 days between the first and the second radiographic examination discovered 39 of the 51 false negative reports. Conclusion Cervical hip trauma radiography has high sensitivity and specificity. With computer-assisted analysis, 76% of false negative reports were found.

  11. Decoding Sensorimotor Rhythms during Robotic-Assisted Treadmill Walking for Brain Computer Interface (BCI Applications.

    Directory of Open Access Journals (Sweden)

    Eliana García-Cossio

    Full Text Available Locomotor malfunction represents a major problem in some neurological disorders like stroke and spinal cord injury. Robot-assisted walking devices have been used during rehabilitation of patients with these ailments for regaining and improving walking ability. Previous studies showed the advantage of brain-computer interface (BCI based robot-assisted training combined with physical therapy in the rehabilitation of the upper limb after stroke. Therefore, stroke patients with walking disorders might also benefit from using BCI robot-assisted training protocols. In order to develop such BCI, it is necessary to evaluate the feasibility to decode walking intention from cortical patterns during robot-assisted gait training. Spectral patterns in the electroencephalogram (EEG related to robot-assisted active and passive walking were investigated in 10 healthy volunteers (mean age 32.3±10.8, six female and in three acute stroke patients (all male, mean age 46.7±16.9, Berg Balance Scale 20±12.8. A logistic regression classifier was used to distinguish walking from baseline in these spectral EEG patterns. Mean classification accuracies of 94.0±5.4% and 93.1±7.9%, respectively, were reached when active and passive walking were compared against baseline. The classification performance between passive and active walking was 83.4±7.4%. A classification accuracy of 89.9±5.7% was achieved in the stroke patients when comparing walking and baseline. Furthermore, in the healthy volunteers modulation of low gamma activity in central midline areas was found to be associated with the gait cycle phases, but not in the stroke patients. Our results demonstrate the feasibility of BCI-based robotic-assisted training devices for gait rehabilitation.

  12. Decoding Sensorimotor Rhythms during Robotic-Assisted Treadmill Walking for Brain Computer Interface (BCI) Applications.

    Science.gov (United States)

    García-Cossio, Eliana; Severens, Marianne; Nienhuis, Bart; Duysens, Jacques; Desain, Peter; Keijsers, Nöel; Farquhar, Jason

    2015-01-01

    Locomotor malfunction represents a major problem in some neurological disorders like stroke and spinal cord injury. Robot-assisted walking devices have been used during rehabilitation of patients with these ailments for regaining and improving walking ability. Previous studies showed the advantage of brain-computer interface (BCI) based robot-assisted training combined with physical therapy in the rehabilitation of the upper limb after stroke. Therefore, stroke patients with walking disorders might also benefit from using BCI robot-assisted training protocols. In order to develop such BCI, it is necessary to evaluate the feasibility to decode walking intention from cortical patterns during robot-assisted gait training. Spectral patterns in the electroencephalogram (EEG) related to robot-assisted active and passive walking were investigated in 10 healthy volunteers (mean age 32.3±10.8, six female) and in three acute stroke patients (all male, mean age 46.7±16.9, Berg Balance Scale 20±12.8). A logistic regression classifier was used to distinguish walking from baseline in these spectral EEG patterns. Mean classification accuracies of 94.0±5.4% and 93.1±7.9%, respectively, were reached when active and passive walking were compared against baseline. The classification performance between passive and active walking was 83.4±7.4%. A classification accuracy of 89.9±5.7% was achieved in the stroke patients when comparing walking and baseline. Furthermore, in the healthy volunteers modulation of low gamma activity in central midline areas was found to be associated with the gait cycle phases, but not in the stroke patients. Our results demonstrate the feasibility of BCI-based robotic-assisted training devices for gait rehabilitation.

  13. Innovation in engineering education through computer assisted learning and virtual university model

    Science.gov (United States)

    Raicu, A.; Raicu, G.

    2015-11-01

    The paper presents the most important aspects of innovation in Engineering Education using Computer Assisted Learning. The authors propose to increase the quality of Engineering Education programs of study at European standards. The use of computer assisted learning methodologies in all studies is becoming an important resource in Higher Education. We intend to improve the concept of e-Learning using virtual terminals, online support and assisting special training through live seminars and interactive labs to develop a virtual university model. We intend to encourage computer assisted learning and innovation as sources of competitive advantage, to permit vision and learning analysis, identifies new sources of technology and ideas. Our work is based on our university datasets collected during last fifteen years using several e-Learning systems. In Constanta Maritime University (CMU), using eLearning and Knowledge Management Services (KMS) is very important and we apply it effectively to achieve strategic objectives, such as collaboration, sharing and good practice. We have experience in this field since 2000 year using Moodle as KMS in our university. The term KMS can be associated to Open Source Software, Open Standards, Open Protocols and Open Knowledge licenses, initiatives and policies. In CMU Virtual Campus we have today over 12500 active users. Another experience of the authors is the implementation of MariTrainer Wiki educational platform based on Dokeos and DekiWiki under MARICOMP and MEP Leonardo da Vinci Project. We'll also present in this paper a case study under EU funded project POSDRU, where the authors implemented other educational platform in Technological High Schools from Romania used over 1000 teachers. Based on large datasets the study tries to improve the concept of e-Learning teaching using the revolutionary technologies. The new concept present in this paper is that the teaching and learning will be interactive and live. The new and modern

  14. Computational rationality: linking mechanism and behavior through bounded utility maximization.

    Science.gov (United States)

    Lewis, Richard L; Howes, Andrew; Singh, Satinder

    2014-04-01

    We propose a framework for including information-processing bounds in rational analyses. It is an application of bounded optimality (Russell & Subramanian, 1995) to the challenges of developing theories of mechanism and behavior. The framework is based on the idea that behaviors are generated by cognitive mechanisms that are adapted to the structure of not only the environment but also the mind and brain itself. We call the framework computational rationality to emphasize the incorporation of computational mechanism into the definition of rational action. Theories are specified as optimal program problems, defined by an adaptation environment, a bounded machine, and a utility function. Such theories yield different classes of explanation, depending on the extent to which they emphasize adaptation to bounds, and adaptation to some ecology that differs from the immediate local environment. We illustrate this variation with examples from three domains: visual attention in a linguistic task, manual response ordering, and reasoning. We explore the relation of this framework to existing "levels" approaches to explanation, and to other optimality-based modeling approaches.

  15. A Study on a Brain-Computer Interface for Motor Assist by Prefrontal Cortex

    Science.gov (United States)

    Misawa, Tadanobu; Takano, Shinya; Shimokawa, Tetsuya; Hirobayashi, Shigeki

    In recent times, considerable research has been conducted on the development of brain-computer interfaces (BCIs). Although there have been several reports on BCIs that assist motor functions by measurement of brain activity in the motor cortex, only a few studies have reported on BCI that assist motor functions by measurement of activity in areas other than the motor cortex. In this study, we experimentally develop a BCI that assists motor functions on the basis of brain activity in the prefrontal cortex. In this BCI system, subjects are shown the labyrinth problem. Concretely, brain activity is measured using fNIRS and the data are acquired in real time. The signal processing module implements low pass filtering of these signals. Further, the pattern classification module used in this system currently is a support vector machine. 22 subjects, both male and female, volunteered to participate in this experiment. 8 of these 22 subjects were able to solve the labyrinth problem. In this experiment, we could not obtain a high distinction. However, these results show that it is possible to develop BCI systems that assist motor functions using information from the prefrontal cortex.

  16. Computer Assisted Feedback of Non-Intellectual Factors as a Means of Improving Small Group Instruction. Final Report.

    Science.gov (United States)

    Hill, Richard J.

    How feedback affects small-group processes and group outcomes and how these outcomes vary with computer-assisted or experimenter-assisted modes of supplying feedback were investigated. Feedback theory was conceptualized through a work-emotionality framework. Theoretical constructs were operationalized through the use of Boyd's three-channel mode…

  17. Usability of an adaptive computer assistant that improves self-care and health literacy of older adults

    NARCIS (Netherlands)

    Blanson Henkemans, O.A.; Rogers, W.A.; Fisk, A.D.; Neerincx, M.A.; Lindenberg, J.; Mast, C.A.P.G. van der

    2008-01-01

    Objectives: We developed an adaptive computer assistant for the supervision of diabetics' self-care, to support limiting illness and need for acute treatment, and improve health literacy. This assistant monitors self-care activities logged in the patient's electronic diary. Accordingly, it provides

  18. InterviewStreamliner, a minimalist, free, open source, relational approach to computer-assisted qualitative data analysis software

    NARCIS (Netherlands)

    H.D. Pruijt (Hans)

    2010-01-01

    textabstractInterviewStreamliner is a free, open source, minimalist alternative to complex computer-assisted qualitative data analysis packages. It builds on the flexibility of relational database management technology.

  19. The growth of computer-assisted (robotic surgery in urology 2000–2014: The role of Asian surgeons

    Directory of Open Access Journals (Sweden)

    Deepansh Dalela

    2015-01-01

    Conclusion: The addition of robot to the surgical armamentarium has allowed better patient care and improved disease outcomes. VUI and surgeons of Asian origin have played a pioneering role in dissemination of computer-assisted surgery.

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

    Science.gov (United States)

    Pascarella, Andrea M.

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

  1. Conference Report: 18th Conference on Computer-Assisted Qualitative Data Analysis (CAQD) 2016: MAXQDA User Conference

    OpenAIRE

    Carlos Galan-Diaz

    2017-01-01

    During the first week of March 2016, 120 researchers from 12 different countries, including Syria, Japan, the USA and Turkey, met in Berlin (Germany) to learn more about their computer-assisted qualitative data analysis skills. The 18th Conference on Computer-Assisted Qualitative Data Analysis (CAQD) offered several workshops, a research methods poster session, and the opportunity to share and discuss best practice between attendees, trainers and speakers (informally and through the user foru...

  2. The effect of computer-assisted foreign language teaching on the student’s attitude and success

    OpenAIRE

    Kocaman, Orhan; İSKENDER, Murat

    2016-01-01

    This research was carried out to determine the impact of computer-assisted teaching on teaching English. The first phase of the research was designed as an experiment and computer-assisted teaching and traditional teaching methods were conducted synchronically in two different groups. In the second phase, effects of variables such as gender, age, receiving private lesson and types of high schools of the students who attended the implementation were analysed.The sample of the research consiste...

  3. Computer-assisted surgical planning and intraoperative guidance in fetal surgery: a systematic review.

    Science.gov (United States)

    Pratt, Rosalind; Deprest, Jan; Vercauteren, Tom; Ourselin, Sebastien; David, Anna L

    2015-12-01

    Fetal surgery has become a clinical reality, with interventions for twin-to-twin transfusion syndrome (TTTS) and spina bifida demonstrated to improve outcome. Fetal imaging is evolving, with the use of 3D ultrasound and fetal MRI becoming more common in clinical practise. Medical imaging analysis is also changing, with technology being developed to assist surgeons by creating 3D virtual models that improve understanding of complex anatomy, and prove powerful tools in surgical planning and intraoperative guidance. We introduce the concept of computer-assisted surgical planning, and present the results of a systematic review of image reconstruction for fetal surgical planning that identified six articles using such technology. Indications from other specialities suggest a benefit of surgical planning and guidance to improve outcomes. There is therefore an urgent need to develop fetal-specific technology in order to improve fetal surgical outcome.

  4. The process of assisting behavior modification in a child with attention-deficit hyperactivity disorder.

    Science.gov (United States)

    Chang, Hsin-Hsin; Chang, Ching-Sheng; Shih, Ying-Ling

    2007-06-01

    Attention Deficit Hyperactivity Disorder (ADHD) is a common psychological disease among children. The purpose of this study was to describe the process of assisting with behavior modification in a child with ADHD. The patient had undergone medical treatment for a year with no obvious effect. With the guidance of other professional people, the child's teachers and nursing instructors, the researchers proceeded with behavioral modification in conjunction with medication for another year. The medication treatment followed doctors' prescriptions, and, as regards the behavioral treatment, doctors and experts drafted and decided the content of the behavioral contract. The main basic techniques were skillful reinforcement and punishment. Then, via interviews with his parents and teachers, information was obtained that provided an understanding of the patient's condition and progress. It was found that the improvements were very significant. On the basis of the research results, the researchers submit that: (1) drug treatment combined with behavioral treatment apparently improves the daily behaviors of hyperactive children; (2) good communication with parents and psychological preparation are the most critical keys to the success of substantial behavioral improvement among hyperactive children; (3) establishment and integration of social resources, including provision of transitional parenting education solutions, and cooperation and sound interaction from school teachers, which fosters consolidated team work, are the critical factors to behavioral improvement among hyperactive children.

  5. Computer-assisted virtual technology in intracapsular condylar fracture with two resorbable long-screws.

    Science.gov (United States)

    Wang, W H; Deng, J Y; Zhu, J; Li, M; Xia, B; Xu, B

    2013-03-01

    Our aim was to fix intracapsular condylar fractures (ICF) with two resorbable long screws using preoperative computer-assisted virtual technology. From February 2008 to July 2011, 19 patients with ICF were treated with two resorbable long screws. Preoperatively we took panoramic radiographs and spiral computed tomography (CT). Depending on their digital imaging and communications in medicine (DICOM) data, the dislocated condylar segments were restored using the SimPlant Pro™ software, version 11.04. The mean (SD) widths of the condylar head and neck from lateral to medial were 19.01 (1.28)mm and 13.84 (1.13)mm, respectively. In all patients, the mandibles and the ICF seen intraoperatively corresponded with the preoperative three-dimensional and virtual reposition. All patients were followed up for 6-46 months (mean 21). Occlusion and mouth opening had been restored completely in all but one patient, and absolute anatomical reduction was also achieved in most cases. Computer-assisted virtual technology plays an important part in the diagnosis of ICF, as well as in its preoperative design. Fixation with only two resorbable long screws is an effective and reliable method for fixing ICF.

  6. Computer navigation assisted fixation in neglected C2-C3 dislocation in an adult

    Directory of Open Access Journals (Sweden)

    S Rajasekaran

    2011-01-01

    Full Text Available A 49-year-old male presented with neck pain and deformity following an industrial accident sustained two months back. His neurology was normal except for a minimal weakness in left biceps (grade 4/5. Radiographs, magnetic resonance imaging and computed tomographic scan revealed fracture dislocation of C2-C3 with significant lateral translation of C2 over C3 without disc herniation. In view of unsuccessful closed reduction and absent disc herniation at the level of dislocation, a posterior only reduction, stabilisation and fusion with Iso-C 3D computer navigation-assisted cervical pedicle screw fixation with transverse rod-screw construct was performed. At 6 months followup the patient was completely relieved of his symptoms and was able to return to his previous occupation. The rare case is reported for the management by Iso-C 3D computer navigation assisted cervical pedicle screw fixation and reduction with transverse rod-screw construct at each involved level.

  7. The Evolution of Computer-Assisted Total Hip Arthroplasty and Relevant Applications

    Science.gov (United States)

    Kim, In-Sung; Bhardwaj, Atul M.; Badami, Ramachandra N.

    2017-01-01

    In total hip arthroplasty (THA), the accurate positioning of implants is the key to achieve a good clinical outcome. Computer-assisted orthopaedic surgery (CAOS) has been developed for more accurate positioning of implants during the THA. There are passive, semi-active, and active systems in CAOS for THA. Navigation is a passive system that only provides information and guidance to the surgeon. There are 3 types of navigation: imageless navigation, computed tomography (CT)-based navigation, and fluoroscopy-based navigation. In imageless navigation system, a new method of registration without the need to register the anterior pelvic plane was introduced. CT-based navigation can be efficiently used for pelvic plane reference, the functional pelvic plane in supine which adjusts anterior pelvic plane sagittal tilt for targeting the cup orientation. Robot-assisted system can be either active or semi-active. The active robotic system performs the preparation for implant positioning as programmed preoperatively. It has been used for only femoral implant cavity preparation. Recently, program for cup positioning was additionally developed. Alternatively, for ease of surgeon acceptance, semi-active robot systems are developed. It was initially applied only for cup positioning. However, with the development of enhanced femoral workflows, this system can now be used to position both cup and stem. Though there have been substantial advancements in computer-assisted THA, its use can still be controversial at present due to the steep learning curve, intraoperative technical issues, high cost and etc. However, in the future, CAOS will certainly enable the surgeon to operate more accurately and lead to improved outcomes in THA as the technology continues to evolve rapidly. PMID:28316957

  8. Tagungsbericht: 18. Conference on Computer-Assisted Qualitative Data Analysis (CAQD) 2016: MAXQDA User Conference

    OpenAIRE

    Galan-Diaz, Carlos

    2017-01-01

    In der ersten Märzwoche 2016 trafen sich ca. 120 Forschende aus 12 Ländern (u.a. Japan, Syrien, den USA und der Türkei) in Berlin, um sich über Nutzungsmöglichkeiten qualitativer Software zu informieren. Die 18. Conference on Computer-Assisted Qualitative Data Analysis (CAQD) erlaubte im Rahmen verschiedener Workshops sowie mittels einer Poster-Session und  von Nutzer/innenforen, Best-Practice-Beispiele (auch informell) zu diskutieren.  Hinzu kamen Keynotes von  John CRESWELL bzw. Udo KUCKART...

  9. Arabic Language Learning Assisted by Computer, based on Automatic Speech Recognition

    CERN Document Server

    Terbeh, Naim

    2012-01-01

    This work consists of creating a system of the Computer Assisted Language Learning (CALL) based on a system of Automatic Speech Recognition (ASR) for the Arabic language using the tool CMU Sphinx3 [1], based on the approach of HMM. To this work, we have constructed a corpus of six hours of speech recordings with a number of nine speakers. we find in the robustness to noise a grounds for the choice of the HMM approach [2]. the results achieved are encouraging since our corpus is made by only nine speakers, but they are always reasons that open the door for other improvement works.

  10. History of computer-assisted data processing in the medical laboratory.

    Science.gov (United States)

    Porth, A J; Lübke, B

    1996-03-01

    Computer-assisted processing of medical laboratory data started in the sixties. The earliest systems, which arose in English- and German-speaking laboratories, pointed the way for the development of laboratory data processing. The significance and evolution of the fundamental components of a laboratory information system, such as the placing of the request to the laboratory, identification of patients and samples, recording of data, quality control, plausibility control and results, are presented. The subject is given a wider perspective by the inclusion of a comprehensive (chronological) literature index.

  11. Applications of computer assisted surgery and medical robotics at the ISSSTE, México: preliminary results.

    Science.gov (United States)

    Mosso, José Luis; Pohl, Mauricio; Jimenez, Juan Ramon; Valdes, Raquel; Yañez, Oscar; Medina, Veronica; Arambula, Fernando; Padilla, Miguel Angel; Marquez, Jorge; Gastelum, Alfonso; Mosso, Alejo; Frausto, Juan

    2007-01-01

    We present the first results of four projects of a second phase of a Mexican Project Computer Assisted Surgery and Medical Robotics, supported by the Mexican Science and Technology National Council (Consejo Nacional de Ciencia y Tecnología) under grant SALUD-2002-C01-8181. The projects are being developed by three universities (UNAM, UAM, ITESM) and the goal of this project is to integrate a laboratory in a Hospital of the ISSSTE to give service to surgeons or clinicians of Endoscopic surgeons, urologist, gastrointestinal endoscopist and neurosurgeons.

  12. Computer-assisted myelography (CAM) in the diagnosis of cervical disk disease. Correlation with surgical findings

    Energy Technology Data Exchange (ETDEWEB)

    Kotwica, Z.; Kasprzak, P. (Medical Univ. of Lodz, Dept. of Neurosurgery (Poland)); Chmielowski, M. (Medical Univ. of Lodz, School of Medicine, Dept. of Medical Imaging (Poland))

    A comparison was made between results obtained from preoperative computer-assisted myelography (CAM), on the one hand, and surgical findings, on the other, for 45 patients with suspicion of cervical disk disease. Full and correct diagnosis, subsequently confirmed by surgery, was enabled by CAM in 98% of all cases. Only one case was left in which preoperative diagnosis had been extraspinal tumour, while surgery revealed prolapse of the nucleus pulposus, the latter lying exposed on the anterior wall of the dural sac. The authors feel CAM to be sufficient for planning of surgical treatment for cervical disk desease, with other neuroradiological investigations, myelography or magnetic resonance tomography usually not being necessary. (orig.).

  13. Computer simulation of ground coupled storage in a series solar assisted heat pump system

    Energy Technology Data Exchange (ETDEWEB)

    Andrews, John W.; Metz, Philip D.

    1979-01-01

    A quantitative study of the effect of thermal coupling between the ground and the heat storage element of a series solar assisted heat pump system is presented. The transient simulation computer program TRNSYS is used to simulate the solar portion of this system. A program to simulate the thermal interaction of the storage element with the ground is incorporated into TRNSYS as a sub-routine. This program calculates heat flow through the ground in discrete steps over space and time. Boundary conditions are established. The ground coupled storage is driven by thermal inputs from the solar portion of the system and from the changing ambient and ground temperatures.

  14. Computer-assisted information management for the pediatric residency review process.

    Science.gov (United States)

    Kallen, R J

    1986-10-01

    Directors of training programs must systematically compile information on the patient population used for graduate education. The revised special requirements and application form of the Residency Review Committee for Pediatrics of the Accreditation Council for Graduate Medical Education call for detailed information on the patient-centered activities of residents. Since data on patient contacts cumulate rapidly, the Pediatrics Residency Program of the Mt. Sinai Medical Center in Cleveland, Ohio, instituted a microcomputer-assisted information management system. Under the system, a personal computer with a fixed disk and data-base management software provides the means for documenting the residents' patient contacts and learning experiences.

  15. Arthroscopic and computer-assisted high tibial osteotomy using standard total knee arthroplasty navigation software.

    Science.gov (United States)

    Thompson, Stephen R; Zabtia, Nazar; Weening, Bradley; Zalzal, Paul

    2013-05-01

    Opening-wedge high tibial osteotomy is an increasingly performed procedure for treatment of varus gonarthrosis and correction of malalignment during meniscal transplantation or cartilage restoration. Precise preoperative planning and meticulous surgical technique are required to achieve an appropriate mechanical axis correction. We describe our technique of arthroscopic and computer-assisted high tibial osteotomy using commonly available total knee arthroplasty navigation software as an intraoperative goniometer. We believe that our technique, by providing intraoperative real-time guidance of the degree of correction that is accurate and reliable, represents a useful tool for the surgeon who uncommonly performs high tibial osteotomy.

  16. A Comparative Study to Evaluate the Effectiveness of Computer Assisted Instruction (CAI) versus Class Room Lecture (RL) for Computer Science at ICS Level

    Science.gov (United States)

    Kausar, Tayyaba; Choudhry, Bushra Naoreen; Gujjar, Aijaz Ahmed

    2008-01-01

    This study was aimed to evaluate the effectiveness of CAI vs. classroom lecture for computer science at ICS level. The objectives were to compare the learning effects of two groups with class room lecture and computer assisted instruction studying the same curriculum and the effects of CAI and CRL in terms of cognitive development. Hypothesis of…

  17. Emotion-Aware Assistive System for Humanistic Care Based on the Orange Computing Concept

    Directory of Open Access Journals (Sweden)

    Jhing-Fa Wang

    2012-01-01

    Full Text Available Mental care has become crucial with the rapid growth of economy and technology. However, recent movements, such as green technologies, place more emphasis on environmental issues than on mental care. Therefore, this study presents an emerging technology called orange computing for mental care applications. Orange computing refers to health, happiness, and physiopsychological care computing, which focuses on designing algorithms and systems for enhancing body and mind balance. The representative color of orange computing originates from a harmonic fusion of passion, love, happiness, and warmth. A case study on a human-machine interactive and assistive system for emotion care was conducted in this study to demonstrate the concept of orange computing. The system can detect emotional states of users by analyzing their facial expressions, emotional speech, and laughter in a ubiquitous environment. In addition, the system can provide corresponding feedback to users according to the results. Experimental results show that the system can achieve an accurate audiovisual recognition rate of 81.8% on average, thereby demonstrating the feasibility of the system. Compared with traditional questionnaire-based approaches, the proposed system can offer real-time analysis of emotional status more efficiently.

  18. Behavioral, Neural, and Computational Principles of Bodily Self-Consciousness.

    Science.gov (United States)

    Blanke, Olaf; Slater, Mel; Serino, Andrea

    2015-10-07

    Recent work in human cognitive neuroscience has linked self-consciousness to the processing of multisensory bodily signals (bodily self-consciousness [BSC]) in fronto-parietal cortex and more posterior temporo-parietal regions. We highlight the behavioral, neurophysiological, neuroimaging, and computational laws that subtend BSC in humans and non-human primates. We propose that BSC includes body-centered perception (hand, face, and trunk), based on the integration of proprioceptive, vestibular, and visual bodily inputs, and involves spatio-temporal mechanisms integrating multisensory bodily stimuli within peripersonal space (PPS). We develop four major constraints of BSC (proprioception, body-related visual information, PPS, and embodiment) and argue that the fronto-parietal and temporo-parietal processing of trunk-centered multisensory signals in PPS is of particular relevance for theoretical models and simulations of BSC and eventually of self-consciousness.

  19. Research on Personalized Behaviors Recommendation System Based on Cloud Computing

    Directory of Open Access Journals (Sweden)

    Wei Dai

    2013-09-01

    Full Text Available Data scale becomes a bottleneck in user behaviors analysis, many data mining algorithms become Inefficient slow in this circumstances. This paper explores an effective approach to mine latent knowledge in large scale data, which combines the basal principles of association rules, MapReduce model and Hbase database. First, general principles and algorithm of association rules are given. Second, the work mechanism and traits of MapReduce model and HBase are introduced. Finally, it gives detailed design methods that how to combine the basal principles of association rules, MapReduce model and Hbase database. Sufficient experiments prove that the processing velocity of parallel approach nearly decuple unparallel approach’s. Therefore, the approach combined association-rule and cloud computing is a successful and valuable exploration.

  20. Behavioral and computational aspects of language and its acquisition

    Science.gov (United States)

    Edelman, Shimon; Waterfall, Heidi

    2007-12-01

    One of the greatest challenges facing the cognitive sciences is to explain what it means to know a language, and how the knowledge of language is acquired. The dominant approach to this challenge within linguistics has been to seek an efficient characterization of the wealth of documented structural properties of language in terms of a compact generative grammar-ideally, the minimal necessary set of innate, universal, exception-less, highly abstract rules that jointly generate all and only the observed phenomena and are common to all human languages. We review developmental, behavioral, and computational evidence that seems to favor an alternative view of language, according to which linguistic structures are generated by a large, open set of constructions of varying degrees of abstraction and complexity, which embody both form and meaning and are acquired through socially situated experience in a given language community, by probabilistic learning algorithms that resemble those at work in other cognitive modalities.

  1. Mobile phone computing for in-situ cognitive behavioral therapy.

    Science.gov (United States)

    Bang, Magnus; Timpka, Toomas; Eriksson, Henrik; Holm, Einar; Nordin, Conny

    2007-01-01

    Cognitive behavioral therapy (CBT) for psychological disorders is becoming increasingly popular on the Internet. However, when using this workstation approach, components such as training and learning relaxation skills, problem solving, exposure exercises, and sleep management guidance must be done in the domestic environment. This paper describes design concepts for providing spatially explicit CBT with mobile phones. We reviewed and analyzed a set of treatment manuals to distinguish elements of CBT that can be improved and supported using mobile phone applications. The key advantage of mobile computing support in CBT is that multimedia can be applied to record, scale, and label anxiety-provoking situations where the need arises, which helps the CBT clients formulate and convey their thoughts and feelings to relatives and friends, as well as to therapists at subsequent treatment sessions.

  2. An augmented reality framework for optimization of computer assisted navigation in endovascular surgery.

    Science.gov (United States)

    Cheng, Irene; Shen, Rui; Moreau, Richard; Brizzi, Vicenzo; Rossol, Nathaniel; Basu, Anup

    2014-01-01

    Endovascular surgery is performed by placing a catheter through blood vessels. Due to the fragility of arteries and the difficulty in controlling a long elastic wire to reach the target region, training plays an extremely important role in helping a surgeon acquire the required complex skills. Virtual reality simulators and augmented reality systems have proven to be effective in minimally invasive surgical training. These systems, however, often employ pre-captured or computer-generated medical images. We have developed an augmented reality system for ultrasound-guided endovascular surgical training, where real ultrasound images captured during the procedure are registered with a pre-scanned phantom model to give the operator a realistic experience. Our goal is to extend the planning and training environment to deliver a system for computer assisted remote endovascular surgery where the navigation of a catheter can be controlled through a robotic device based on the guidance provided by an endovascular surgeon.

  3. Computer-assisted coloring and illuminating based on a region-tree structure.

    Science.gov (United States)

    Nascimento, Renata; Queiroz, Fabiane; Rocha, Allan; Ren, Tsang Ing; Mello, Vinicius; Peixoto, Adelailson

    2012-01-01

    Colorization and illumination are key processes for creating animated cartoons. Computer assisted methods have been incorporated in animation/illustration systems to reduce the artists' workload. This paper presents a new method for illumination and colorization of 2D drawings based on a region- tree representation. Starting from a hand-drawn cartoon, the proposed method extracts geometric and topological information and builds a tree structure, ensuring independence among parts of the drawing, such as curves and regions. Based on this structure and its attributes, a colorization method that propagates through consecutive frames of animation is proposed, combined with an interpolation method that accurately computes a normal mapping for the illumination process. Different operators for curve and region attributes can be applied independently, obtaining different rendering effects.

  4. A computational model that predicts behavioral sensitivity to intracortical microstimulation

    Science.gov (United States)

    Kim, Sungshin; Callier, Thierri; Bensmaia, Sliman J.

    2017-02-01

    Objective. Intracortical microstimulation (ICMS) is a powerful tool to investigate the neural mechanisms of perception and can be used to restore sensation for patients who have lost it. While sensitivity to ICMS has previously been characterized, no systematic framework has been developed to summarize the detectability of individual ICMS pulse trains or the discriminability of pairs of pulse trains. Approach. We develop a simple simulation that describes the responses of a population of neurons to a train of electrical pulses delivered through a microelectrode. We then perform an ideal observer analysis on the simulated population responses to predict the behavioral performance of non-human primates in ICMS detection and discrimination tasks. Main results. Our computational model can predict behavioral performance across a wide range of stimulation conditions with high accuracy (R 2 = 0.97) and generalizes to novel ICMS pulse trains that were not used to fit its parameters. Furthermore, the model provides a theoretical basis for the finding that amplitude discrimination based on ICMS violates Weber’s law. Significance. The model can be used to characterize the sensitivity to ICMS across the range of perceptible and safe stimulation regimes. As such, it will be a useful tool for both neuroscience and neuroprosthetics.

  5. Development of a Computer-Assisted Instrumentation Curriculum for Physics Students: Using LabVIEW and Arduino Platform

    Science.gov (United States)

    Kuan, Wen-Hsuan; Tseng, Chi-Hung; Chen, Sufen; Wong, Ching-Chang

    2016-01-01

    We propose an integrated curriculum to establish essential abilities of computer programming for the freshmen of a physics department. The implementation of the graphical-based interfaces from Scratch to LabVIEW then to LabVIEW for Arduino in the curriculum "Computer-Assisted Instrumentation in the Design of Physics Laboratories" brings…

  6. Computer-Assisted Learning in Anatomy at the International Medical School in Debrecen, Hungary: A Preliminary Report

    Science.gov (United States)

    Kish, Gary; Cook, Samuel A.; Kis, Greta

    2013-01-01

    The University of Debrecen's Faculty of Medicine has an international, multilingual student population with anatomy courses taught in English to all but Hungarian students. An elective computer-assisted gross anatomy course, the Computer Human Anatomy (CHA), has been taught in English at the Anatomy Department since 2008. This course focuses on an…

  7. Biology Teacher and Expert Opinions about Computer Assisted Biology Instruction Materials: A Software Entitled Nucleic Acids and Protein Synthesis

    Science.gov (United States)

    Hasenekoglu, Ismet; Timucin, Melih

    2007-01-01

    The aim of this study is to collect and evaluate opinions of CAI experts and biology teachers about a high school level Computer Assisted Biology Instruction Material presenting computer-made modelling and simulations. It is a case study. A material covering "Nucleic Acids and Protein Synthesis" topic was developed as the…

  8. Independent versus sequential reading in ROC studies of computer-assist modalities

    Science.gov (United States)

    Beiden, Sergey V.; Wagner, Robert F.; Doi, Kunio; Nishikawa, Robert M.; Freedman, Matthew T.; Lo, Shih-Chung B.; Xu, Xin-Wei

    2002-04-01

    This paper provides results of a statistical analysis of two methods for arranging the temporal sequencing of the unaided vs computer-assisted reading in multiple-reader, multiple- case (MRMC) receiver operating characteristic (ROC) studies of computer-aided detection of solitary pulmonary nodules (SPNs) on chest radiographs. The modes are the Independent mode, in which the readings are separated by a time on the order of one month, and the Sequential mode, in which the CAD-assisted reading immediately follows the unassisted reading. The method of Beiden, Wagner, Campbell (BWC) was used to decompose the variance of the ROC area summary accuracy measure into the components that are correlated across unaided and aided reading conditions and the components that are uncorrelated across these reading conditions. The latter are the only components of variability that contribute to the uncertainty in a measurement of the difference in reader performance between reading conditions. These uncorrelated components were dramatically reduced in the Sequential reading mode compared to the Independent reading mode-while the total reader variability remained almost constant. The results were remarkably similar across two independent studies analyzed. This may have important practical consequences because the Sequential mode is the least demanding on reader logistics and time.

  9. Using embedded computer-assisted instruction to teach science to students with Autism Spectrum Disorders

    Science.gov (United States)

    Smith, Bethany

    The need for promoting scientific literacy for all students has been the focus of recent education reform resulting in the rise of the Science Technology, Engineering, and Mathematics movement. For students with Autism Spectrum Disorders and intellectual disability, this need for scientific literacy is further complicated by the need for individualized instruction that is often required to teach new skills, especially when those skills are academic in nature. In order to address this need for specialized instruction, as well as scientific literacy, this study investigated the effects of embedded computer-assisted instruction to teach science terms and application of those terms to three middle school students with autism and intellectual disability. This study was implemented within an inclusive science classroom setting. A multiple probe across participants research design was used to examine the effectiveness of the intervention. Results of this study showed a functional relationship between the number of correct responses made during probe sessions and introduction of the intervention. Additionally, all three participants maintained the acquired science terms and applications over time and generalized these skills across materials and settings. The findings of this study suggest several implications for practice within inclusive settings and provide suggestions for future research investigating the effectiveness of computer-assisted instruction to teach academic skills to students with Autism Spectrum Disorders and intellectual disability.

  10. A Brief Review of Computer-Assisted Approaches to Rational Design of Peptide Vaccines

    Science.gov (United States)

    Nandy, Ashesh; Basak, Subhash C.

    2016-01-01

    The growing incidences of new viral diseases and increasingly frequent viral epidemics have strained therapeutic and preventive measures; the high mutability of viral genes puts additional strains on developmental efforts. Given the high cost and time requirements for new drugs development, vaccines remain as a viable alternative, but there too traditional techniques of live-attenuated or inactivated vaccines have the danger of allergenic reactions and others. Peptide vaccines have, over the last several years, begun to be looked on as more appropriate alternatives, which are economically affordable, require less time for development and hold the promise of multi-valent dosages. The developments in bioinformatics, proteomics, immunogenomics, structural biology and other sciences have spurred the growth of vaccinomics where computer assisted approaches serve to identify suitable peptide targets for eventual development of vaccines. In this mini-review we give a brief overview of some of the recent trends in computer assisted vaccine development with emphasis on the primary selection procedures of probable peptide candidates for vaccine development. PMID:27153063

  11. A Brief Review of Computer-Assisted Approaches to Rational Design of Peptide Vaccines.

    Science.gov (United States)

    Nandy, Ashesh; Basak, Subhash C

    2016-05-04

    The growing incidences of new viral diseases and increasingly frequent viral epidemics have strained therapeutic and preventive measures; the high mutability of viral genes puts additional strains on developmental efforts. Given the high cost and time requirements for new drugs development, vaccines remain as a viable alternative, but there too traditional techniques of live-attenuated or inactivated vaccines have the danger of allergenic reactions and others. Peptide vaccines have, over the last several years, begun to be looked on as more appropriate alternatives, which are economically affordable, require less time for development and hold the promise of multi-valent dosages. The developments in bioinformatics, proteomics, immunogenomics, structural biology and other sciences have spurred the growth of vaccinomics where computer assisted approaches serve to identify suitable peptide targets for eventual development of vaccines. In this mini-review we give a brief overview of some of the recent trends in computer assisted vaccine development with emphasis on the primary selection procedures of probable peptide candidates for vaccine development.

  12. The effects of advance organizers according learning styles in computer assisted instruction software on academic achievement

    Directory of Open Access Journals (Sweden)

    Buket Demir

    2011-09-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 This study aims to investigate the effects of advance organizers existing in computer assisted instruction software on academic achievement of the students who have different types of learning styles. Semi–empirical design with Pretest–posttest and with control group was used. The research sample was composed of 131students having Information Technology Course in Süleyman Türkmani Primary School located in Kırşehir in 2010–2011 academic year. Research data was collected by using Kolb’s Learning Style Inventory and Academic Achievement Test (KR–20: 0,82. One way ANOVA and Independent Sample T-Test were conducted on the all data collected and these results were emerged: The existence of advance organizers in a instructional software was affect the the academic achievement of students. There was also difference between the academic achievement of field independent learners whom studied in the computer assisted environment which was both include advance organizer and not include.

  13. Image-based computer-assisted diagnosis system for benign paroxysmal positional vertigo

    Science.gov (United States)

    Kohigashi, Satoru; Nakamae, Koji; Fujioka, Hiromu

    2005-04-01

    We develop the image based computer assisted diagnosis system for benign paroxysmal positional vertigo (BPPV) that consists of the balance control system simulator, the 3D eye movement simulator, and the extraction method of nystagmus response directly from an eye movement image sequence. In the system, the causes and conditions of BPPV are estimated by searching the database for record matching with the nystagmus response for the observed eye image sequence of the patient with BPPV. The database includes the nystagmus responses for simulated eye movement sequences. The eye movement velocity is obtained by using the balance control system simulator that allows us to simulate BPPV under various conditions such as canalithiasis, cupulolithiasis, number of otoconia, otoconium size, and so on. Then the eye movement image sequence is displayed on the CRT by the 3D eye movement simulator. The nystagmus responses are extracted from the image sequence by the proposed method and are stored in the database. In order to enhance the diagnosis accuracy, the nystagmus response for a newly simulated sequence is matched with that for the observed sequence. From the matched simulation conditions, the causes and conditions of BPPV are estimated. We apply our image based computer assisted diagnosis system to two real eye movement image sequences for patients with BPPV to show its validity.

  14. Effects of Cadmium on Rat Sperm Motility Evaluated With Computer Assisted Sperm Analysis

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Objective To study effects of cadmium on rat sperm motility evaluated with computer assisted sperm analysis. Methods  Different doses of cadmium chloride (0.2,0.4,0.8mg Cd/kg BW) were administrated ip to adult male Sprague-Dawley rats. Control animals received the same volume of 0.9% NaCl solution. After 7 days, the rats were sacrificed with their testes removed. A part of one testis was used for testicular sperm head counts and daily sperm production observation. The motility of spermatozoa obtained from cauda epididymides using the “diffusion”method was measured by computer assisted sperm analysis(CASA). Results  The sperm head counts and daily sperm production decreased significantly in the high dose group. The motility of spermatozoa in the middle dose group was reduced significantly. No motile sperm was found in the high dose group. The results suggest that germinal epithelium was impaired irreversibly in a short time to produce toxic effects on spermatogenesis at high cadmium doses. Conclusion  Cadmium may reduce sperm motility at a dose far below the dose affecting sperm production at this time point. The motility of sperm is an early and sensitive endpoint for the assessment of cadmium toxicity on male reproduction.

  15. Complications of fixed infrared emitters in computer-assisted total knee arthroplasties

    Directory of Open Access Journals (Sweden)

    Suárez-Vázquez Abelardo

    2007-07-01

    Full Text Available Abstract Background The first stage in the implant of a total knee arthroplasty with computer-assisted surgery is to fasten the emitters to the femur and the tibia. These trackers must be hard-fixed to the bone. The objectives of our study are to evaluate the technical problems and complications of these tracker-pins, the necessary time to fix them to the bone and the possible advantages of a new femoral-fixed tracker-pin. Methods Three hundred and sixty seven tracker-pins were used in one hundred and fifty one computer-assisted total knee replacements. A bicortical screw was used to fix the tracker to the tibia in all cases; in the femur, however, a bicortical tracker was used in 112 cases, while a new device (OrthoLock with percutaneous fixation pins was employed in the remaining 39. Results Technical problems related to the fixing of the trackers appeared in nine cases (2.5%. The mean surgery time to fix the tracker pin to the tibia was 3 minutes (range 2–7, and 5 minutes in the case of the femoral pin (range: 4–11, although with the new tool it was only three minutes (range 2–4 (p Conclusion The incidence of problems and complications with the fixing systems used in knee navigation is very small. The use of a new device with percutaneous pins facilitates the fixing of femoral trackers and decreases the time needed to place them.

  16. Effectiveness of Computer Assisted Instructions (CAI) in Teaching of Mathematics at Secondary Level

    Science.gov (United States)

    Dhevakrishnan, R.; Devi, S.; Chinnaiyan, K.

    2012-09-01

    The present study was aimed at effectiveness of computer assisted instructions (CAI) in teaching of mathematics at secondary level adopted experimental method and observing the difference between (CAI) and traditional method. A sample of sixty (60) students of IX class in VVB Matriculation Higher Secondary School at Elayampalayam, Namakkal district were selected for a sample and sample was divided into two group namely experiment and control group. The experimental group consisted 30 students who were taught 'Mensurationí by the computer assisted instructions and the control groups comprising 30 students were taught by the conventional method of teaching. Data analyzed using mean, S.D. and t-test. Findings of the study clearly point out that significant increase in the mean gain scores has been found in the post test scores of the experimental group. Significant differences have been found between the control group and experimental group on post test gain scores. The experiment group, which was taught by the CAI showed better, learning. The conclusion is evident that the CAI is an effective media of instruction for teaching Mathematics at secondary students.s

  17. 3D computer-assisted assessment of complicated penetrating foreign bodies cases in ENT practice.

    Science.gov (United States)

    Vaiman, Michael; Bekerman, Inessa; Puterman, Max

    2009-10-01

    A retrospective research was performed in order to evaluate three-dimensional (3D) computer-assisted detection of penetrating foreign bodies (FB) in the ENT practice in order to assess its usefulness and to specify its application. FBs in the head and neck were detected using 3D CT imaging in order to assess the usefulness of 3D images in the ENT operative practice. Three blinded surgeons were involved in comparison between plain and 3D CT images in order to assess 3D usefulness for precise formulation of a surgical plan. The observed relationship of the FBs to anatomical structures of the ethmoidal sinuses, eye orbit, and neck tissues was found instrumental for surgeon's decision making in planning the approach to operative removal of the FB. It helps to understand the relationships between a FB and surrounding anatomical structures better then the plain X-rays or CT-scan. There was no significant difference in cost between plain CT and 3D images. 3D computer-assisted detection of FBs increase our diagnostic abilities and appears to be a valuable addition to our diagnostic technique. Its main importance, however, lies in its capacity to help a surgeon plan an operation much more carefully avoiding improvisation during the operation itself.

  18. Automated anatomical description of pleural thickening towards improvement of its computer-assisted diagnosis

    Science.gov (United States)

    Chaisaowong, Kraisorn; Jiang, Mingze; Faltin, Peter; Merhof, Dorit; Eisenhawer, Christian; Gube, Monika; Kraus, Thomas

    2016-03-01

    Pleural thickenings are caused by asbestos exposure and may evolve into malignant pleural mesothelioma. An early diagnosis plays a key role towards an early treatment and an increased survival rate. Today, pleural thickenings are detected by visual inspection of CT data, which is time-consuming and underlies the physician's subjective judgment. A computer-assisted diagnosis system to automatically assess pleural thickenings has been developed, which includes not only a quantitative assessment with respect to size and location, but also enhances this information with an anatomical description, i.e. lung side (left, right), part of pleura (pars costalis, mediastinalis, diaphragmatica, spinalis), as well as vertical (upper, middle, lower) and horizontal (ventral, dorsal) position. For this purpose, a 3D anatomical model of the lung surface has been manually constructed as a 3D atlas. Three registration sub-steps including rigid, affine, and nonrigid registration align the input patient lung to the 3D anatomical atlas model of the lung surface. Finally, each detected pleural thickening is assigned a set of labels describing its anatomical properties. Through this added information, an enhancement to the existing computer-assisted diagnosis system is presented in order to assure a higher precision and reproducible assessment of pleural thickenings, aiming at the diagnosis of the pleural mesothelioma in its early stage.

  19. A Brief Review of Computer-Assisted Approaches to Rational Design of Peptide Vaccines

    Directory of Open Access Journals (Sweden)

    Ashesh Nandy

    2016-05-01

    Full Text Available The growing incidences of new viral diseases and increasingly frequent viral epidemics have strained therapeutic and preventive measures; the high mutability of viral genes puts additional strains on developmental efforts. Given the high cost and time requirements for new drugs development, vaccines remain as a viable alternative, but there too traditional techniques of live-attenuated or inactivated vaccines have the danger of allergenic reactions and others. Peptide vaccines have, over the last several years, begun to be looked on as more appropriate alternatives, which are economically affordable, require less time for development and hold the promise of multi-valent dosages. The developments in bioinformatics, proteomics, immunogenomics, structural biology and other sciences have spurred the growth of vaccinomics where computer assisted approaches serve to identify suitable peptide targets for eventual development of vaccines. In this mini-review we give a brief overview of some of the recent trends in computer assisted vaccine development with emphasis on the primary selection procedures of probable peptide candidates for vaccine development.

  20. Total knee arthroplasty with computer-assisted navigation: an analysis of 200 cases,

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Malheiros Luzo

    2014-04-01

    Full Text Available OBJECTIVE: to evaluate the results from surgery with computer-assisted navigation in cases of total knee arthroplasty.METHOD: a total of 196 patients who underwent total knee arthroplasty with computer-assisted navigation were evaluated. The extension and flexion spaces (gaps were evaluated during the operation and the alignment after the operation was assessed. The Knee Society Score (KSS questionnaire for assessing patient's function was applied preoperatively and postoperatively after a mean follow-up of 22 months.RESULTS: in all, 86.7% of the patients presented good alignment of the mechanical axis (less than 3◦ of varus or valgus in relation to the mechanical axis and 96.4% of the patients presented balanced flexion and extension gaps. Before the operation, 97% of the patients presented poor or insufficient KSS, but after the operation, 77.6% presented good or excellent KSS.CONCLUSION: the navigation system made it possible to achieve aligned and balanced implants, with notable functional improvement among the patients. It was found to be useful in assessing, understanding and improving knowledge in relation to performing arthroplasty procedures.

  1. Boolean Combinations of Implicit Functions for Model Clipping in Computer-Assisted Surgical Planning.

    Science.gov (United States)

    Zhan, Qiqin; Chen, Xiaojun

    2016-01-01

    This paper proposes an interactive method of model clipping for computer-assisted surgical planning. The model is separated by a data filter that is defined by the implicit function of the clipping path. Being interactive to surgeons, the clipping path that is composed of the plane widgets can be manually repositioned along the desirable presurgical path, which means that surgeons can produce any accurate shape of the clipped model. The implicit function is acquired through a recursive algorithm based on the Boolean combinations (including Boolean union and Boolean intersection) of a series of plane widgets' implicit functions. The algorithm is evaluated as highly efficient because the best time performance of the algorithm is linear, which applies to most of the cases in the computer-assisted surgical planning. Based on the above stated algorithm, a user-friendly module named SmartModelClip is developed on the basis of Slicer platform and VTK. A number of arbitrary clipping paths have been tested. Experimental results of presurgical planning for three types of Le Fort fractures and for tumor removal demonstrate the high reliability and efficiency of our recursive algorithm and robustness of the module.

  2. A Data Quality Control Program for Computer-Assisted Personal Interviews

    Directory of Open Access Journals (Sweden)

    Janet E. Squires

    2012-01-01

    Full Text Available Researchers strive to optimize data quality in order to ensure that study findings are valid and reliable. In this paper, we describe a data quality control program designed to maximize quality of survey data collected using computer-assisted personal interviews. The quality control program comprised three phases: (1 software development, (2 an interviewer quality control protocol, and (3 a data cleaning and processing protocol. To illustrate the value of the program, we assess its use in the Translating Research in Elder Care Study. We utilize data collected annually for two years from computer-assisted personal interviews with 3004 healthcare aides. Data quality was assessed using both survey and process data. Missing data and data errors were minimal. Mean and median values and standard deviations were within acceptable limits. Process data indicated that in only 3.4% and 4.0% of cases was the interviewer unable to conduct interviews in accordance with the details of the program. Interviewers’ perceptions of interview quality also significantly improved between Years 1 and 2. While this data quality control program was demanding in terms of time and resources, we found that the benefits clearly outweighed the effort required to achieve high-quality data.

  3. Three-dimensional computer-assisted surgical simulation and intraoperative navigation in orthognathic surgery: a literature review.

    Science.gov (United States)

    Lin, Hsiu-Hsia; Lo, Lun-Jou

    2015-04-01

    By incorporating three-dimensional (3D) imaging and computer-aided design and manufacturing techniques, 3D computer-assisted technology has been applied widely to provide accurate guidance for assessment and treatment planning in clinical practice. This technology has recently been used in orthognathic surgery to improve surgical planning and outcome. The modality will gradually become popular. This study reviewed the literature concerning the use of computer-assisted techniques in orthognathic surgery including surgical planning, simulation, intraoperative translation of the virtual surgery, and postoperative evaluation. A Medline, PubMed, ProQuest, and ScienceDirect search was performed to find relevant articles with regard to 3D computer-assisted orthognathic surgery in the past 10 years. A total of 460 articles were revealed, out of which 174 were publications addressed the topic of this study. The purpose of this article is to present an overview of the state-of-art methods for 3D computer-assisted technology in orthognathic surgery. From the review we can conclude that the use of computer-assisted technique in orthognathic surgery provides the benefit of optimal functional and aesthetic results, patient satisfaction, precise translation of the treatment plan, and facilitating intraoperative manipulation.

  4. Application of computer assisted combinatorial chemistry in antivirial, antimalarial and anticancer agents design

    Science.gov (United States)

    Burello, E.; Bologa, C.; Frecer, V.; Miertus, S.

    Combinatorial chemistry and technologies have been developed to a stage where synthetic schemes are available for generation of a large variety of organic molecules. The innovative concept of combinatorial design assumes that screening of a large and diverse library of compounds will increase the probability of finding an active analogue among the compounds tested. Since the rate at which libraries are screened for activity currently constitutes a limitation to the use of combinatorial technologies, it is important to be selective about the number of compounds to be synthesized. Early experience with combinatorial chemistry indicated that chemical diversity alone did not result in a significant increase in the number of generated lead compounds. Emphasis has therefore been increasingly put on the use of computer assisted combinatorial chemical techniques. Computational methods are valuable in the design of virtual libraries of molecular models. Selection strategies based on computed physicochemical properties of the models or of a target compound are introduced to reduce the time and costs of library synthesis and screening. In addition, computational structure-based library focusing methods can be used to perform in silico screening of the activity of compounds against a target receptor by docking the ligands into the receptor model. Three case studies are discussed dealing with the design of targeted combinatorial libraries of inhibitors of HIV-1 protease, P. falciparum plasmepsin and human urokinase as potential antivirial, antimalarial and anticancer drugs. These illustrate library focusing strategies.

  5. Focus on Methodology: Beyond paper and pencil: Conducting computer-assisted data collection with adolescents in group settings.

    Science.gov (United States)

    Raffaelli, Marcela; Armstrong, Jessica; Tran, Steve P; Griffith, Aisha N; Walker, Kathrin; Gutierrez, Vanessa

    2016-06-01

    Computer-assisted data collection offers advantages over traditional paper and pencil measures; however, little guidance is available regarding the logistics of conducting computer-assisted data collection with adolescents in group settings. To address this gap, we draw on our experiences conducting a multi-site longitudinal study of adolescent development. Structured questionnaires programmed on laptop computers using Audio Computer Assisted Self-Interviewing (ACASI) were administered to groups of adolescents in community-based and afterschool programs. Although implementing ACASI required additional work before entering the field, we benefited from reduced data processing time, high data quality, and high levels of youth motivation. Preliminary findings from an ethnically diverse sample of 265 youth indicate favorable perceptions of using ACASI. Using our experiences as a case study, we provide recommendations on selecting an appropriate data collection device (including hardware and software), preparing and testing the ACASI, conducting data collection in the field, and managing data.

  6. The application of computer assisted technologies (CAT in the rehabilitation of cognitive functions in psychiatric disorders of childhood and adolescence

    Directory of Open Access Journals (Sweden)

    Tomasz Srebnicki

    2016-06-01

    Full Text Available First applications of computer-assisted technologies (CAT in the rehabilitation of cognitive deficits, including child and adolescent psychiatric disorders date back to the 80’s last century. Recent developments in computer technologies, wide access to the Internet and vast expansion of electronic devices resulted in dynamic increase in therapeutic software as well as supporting devices. The aim of computer assisted technologies is the improvement in the comfort and quality of life as well as the rehabilitation of impaired functions. The goal of the article is the presentation of most common computer-assisted technologies used in the therapy of children and adolescents with cognitive deficits as well as the literature review of their effectiveness including the challenges and limitations in regard to the implementation of such interventions.

  7. The effect of computer-assisted translation on L2 learners’ mastery of writing

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    Ahmad Ali Kazemzadeh

    2014-07-01

    Full Text Available Computer-Assisted Translation (CAT is an alternative approach to computer translation that integrates human expertise into the automatic translation process. In this realm, the few studies that deal with Computer Assisted Translation (CAT as a language learning tool focus on its use by advanced learners, not by beginners. Yet, freely available CAT engines (i.e. Google Translate position themselves to cater precisely to the needs of learners with a limited command of a second language (L2. Anecdotal classroom evidence points to beginners availing themselves of CAT help, even against the advice of teachers. In order to find out whether CAT could help develop learners’ writing skills in L2, some tests were run asking participants to write directly into L2 in one instance and into L1 in another, while pre-editing the L1 and post-editing the L2 within the CAT’s Translate.google.com interface. The analysis of the output shows that CAT helps beginners to communicate more, particularly when they have a lesser mastery of the language. The less their mastery of the L2, the greater the difference between the number of words composed with the help of CAT and the number of those written directly into L2. It also helps them to communicate better, with blind marking indicating higher quality when writing with CAT mediation. Looking at the screen recordings, on the other hand, we found that writing directly into L2 requires more effort, as measured by number of pauses, and involves more engagement with the task, as measured by the number of editing interventions.

  8. Human behavior understanding for assisted living by means of hierarchical context free grammars

    Science.gov (United States)

    Rosani, A.; Conci, N.; De Natale, F. G. B.

    2014-03-01

    Human behavior understanding has attracted the attention of researchers in various fields over the last years. Recognizing behaviors with sufficient accuracy from sensors analysis is still an unsolved problem, because of many reasons, including the low accuracy of the data, differences in the human behaviors as well as the gap between low-level sensors data and high-level scene semantics. In this context, an application that is attracting the interest of both public and industrial entities is the possibility to allow elderly or physically impaired people conducting a normal life at home. Ambient intelligence (AmI) technologies, intended as the possibility of automatically detecting and reacting to the status of the environment and of the persons, is probably the major enabling factor for the achievement of such an ambitious objective. AmI technologies require suitable networks of sensors and actuators, as well as adequate processing and communication technologies. In this paper we propose a solution based on context free grammars for human behavior understanding with an application to assisted living. First, the grammars of the different actions performed by a person in his/her daily life are discovered. Then, a longterm analysis of the behavior is used to generate a control grammar, taking care of the context when an action is performed, and adding semantics. The proposed framework is tested on a dataset acquired in a real environment and compared with state of the art methods already available for the problem considered.

  9. Combining Brain-Computer Interfaces and Assistive Technologies: State-of-the-Art and Challenges

    Directory of Open Access Journals (Sweden)

    José del R. Millán

    2010-09-01

    Full Text Available In recent years, new research has brought the field of EEG-based Brain-Computer Interfacing (BCI out of its infancy and into a phase of relative maturity through many demonstrated prototypes such as brain-controlled wheelchairs, keyboards, and computer games. With this proof-of-concept phase in the past, the time is now ripe to focus on the development of practical BCI technologies that can be brought out of the lab and into real-world applications. In particular, we focus on the prospect of improving the lives of countless disabled individuals through a combination of BCI technology with existing assistive technologies (AT. In pursuit of more practical BCIs for use outside of the lab, in this paper, we identify four application areas where disabled individuals could greatly benefit from advancements in BCI technology, namely,“Communication & Control”, “Motor Substitution”, “Entertainment”, and “Motor Recovery”. We review the current state of the art and possible future developments, while discussing the main research issues in these four areas. In particular, we expect the most progress in the development of technologies such as hybrid BCI architectures, user-machine adaptation algorithms, the exploitation of users’ mental states for BCI reliability and confidence measures, the incorporation of principles in human-computer interaction (HCI to improve BCI usability, and the development of novel BCI technology including better EEG devices.

  10. Microwave assisted leaching and electrochemical recovery of copper from printed circuit boards of computer waste

    Directory of Open Access Journals (Sweden)

    Ivănuş R.C.

    2010-06-01

    Full Text Available Due to the rapid technological progress, the replacement of electronic equipment is very often necessary, leading to huge amounts that end up as waste. In addition, waste electrical and electronic equipment (WEEE contains metals of high commercial value and others that are supposed to be hazardous for the environment. Consequently, WEEE could be considered as a significant source for recovery of nonferrous metals. Among these wastes, computers appear to be distinctive, as far as further exploitation is concerned. The most ″useful″ parts of the computers are the printed circuit boards that contain many metals of interest. A study on microwave assisted electronic scrap (printed circuit boards of computer waste – PCBs leaching was carried out with a microwave hydrothermal reactor. The leaching was conducted with thick slurries (50-100 g/L. The leaching media is a mixed solution of CuCl2 and NaCl. Preliminary electrolysis from leaching solution has investigated the feasibility of electrodeposition of copper. The results were discussed and compared with the conventional leaching method and demonstrated the potential for selective extraction of copper from PCBs.

  11. [Development of computer assisted learning program using cone beam projection for head radiography].

    Science.gov (United States)

    Nakazeko, Kazuma; Kajiwara, Hironori; Watanabe, Hiroyuki; Kuwayama, Jun; Karube, Shuhei; Araki, Misao; Hashimoto, Takeyuki; Shinohara, Hiroyuki

    2012-01-01

    We present a computer assisted learning (CAL) program to simulate head radiography. The program provides cone beam projections of a target volume, simulating three-dimensional computed tomography (CT) of a head phantom. The generated image is 512 x 512 x 512 pixels with each pixel 0.6 mm on a side. The imaging geometry, such as X-ray tube orientation and phantom orientation, can be varied. The graphical user interface (GUI) of the CAL program allows the study of the effects of varying the imaging geometry; each simulated projection image is shown quickly in an adjoining window. Simulated images with an assigned geometry were compared with the image obtained using the standard geometry in clinical use. The accuracy of the simulated image was verified through comparison with the image acquired using radiography of the head phantom, subsequently processed with a computed radiography system (CR image). Based on correlation coefficient analysis and visual assessment, it was concluded that the CAL program can satisfactorily simulate the CR image. Therefore, it should be useful for the training of head radiography.

  12. Combining Brain-Computer Interfaces and Assistive Technologies: State-of-the-Art and Challenges.

    Science.gov (United States)

    Millán, J D R; Rupp, R; Müller-Putz, G R; Murray-Smith, R; Giugliemma, C; Tangermann, M; Vidaurre, C; Cincotti, F; Kübler, A; Leeb, R; Neuper, C; Müller, K-R; Mattia, D

    2010-01-01

    In recent years, new research has brought the field of electroencephalogram (EEG)-based brain-computer interfacing (BCI) out of its infancy and into a phase of relative maturity through many demonstrated prototypes such as brain-controlled wheelchairs, keyboards, and computer games. With this proof-of-concept phase in the past, the time is now ripe to focus on the development of practical BCI technologies that can be brought out of the lab and into real-world applications. In particular, we focus on the prospect of improving the lives of countless disabled individuals through a combination of BCI technology with existing assistive technologies (AT). In pursuit of more practical BCIs for use outside of the lab, in this paper, we identify four application areas where disabled individuals could greatly benefit from advancements in BCI technology, namely, "Communication and Control", "Motor Substitution", "Entertainment", and "Motor Recovery". We review the current state of the art and possible future developments, while discussing the main research issues in these four areas. In particular, we expect the most progress in the development of technologies such as hybrid BCI architectures, user-machine adaptation algorithms, the exploitation of users' mental states for BCI reliability and confidence measures, the incorporation of principles in human-computer interaction (HCI) to improve BCI usability, and the development of novel BCI technology including better EEG devices.

  13. Microwave assisted leaching and electrochemical recovery of copper from printed circuit boards of computer waste

    Science.gov (United States)

    Ivǎnuş, R. C.; ǎnuş, D., IV; Cǎlmuc, F.

    2010-06-01

    Due to the rapid technological progress, the replacement of electronic equipment is very often necessary, leading to huge amounts that end up as waste. In addition, waste electrical and electronic equipment (WEEE) contains metals of high commercial value and others that are supposed to be hazardous for the environment. Consequently, WEEE could be considered as a significant source for recovery of nonferrous metals. Among these wastes, computers appear to be distinctive, as far as further exploitation is concerned. The most ″useful″ parts of the computers are the printed circuit boards that contain many metals of interest. A study on microwave assisted electronic scrap (printed circuit boards of computer waste - PCBs) leaching was carried out with a microwave hydrothermal reactor. The leaching was conducted with thick slurries (50-100 g/L). The leaching media is a mixed solution of CuCl2 and NaCl. Preliminary electrolysis from leaching solution has investigated the feasibility of electrodeposition of copper. The results were discussed and compared with the conventional leaching method and demonstrated the potential for selective extraction of copper from PCBs.

  14. [Effects of computer-assisted practice on reading and spelling in children with learning disabilities].

    Science.gov (United States)

    Jiménez, Juan E; Muñetón, Mercedes A

    2010-11-01

    The main purpose of this study was to analyze the effects of computer-assisted practice on reading and spelling in children with learning disabilities (LD). We compared three practice conditions, one with reading and two with spelling, in order to test whether computer-based reading and spelling practice has an influence on the development of reading and spelling ability in children with LD. A sample was selected of 85 children with LD, with age range between 8 years and 10 years (age, M=111.02, SD=9.6), whose spelling performance was two years below grade level. The participants were randomly assigned to one of four groups: 1) Copy the target word from the computer screen (n=22), 2) Memorize the target word and write it from memory (n=21), 3) Word reading (n=21), and 4) the untrained control group (n=21). We administered measures of pseudoword reading, phonological awareness, phonological word decoding and orthographical word decoding tasks. We examined the learning effects and transfer effects on words classified as a function of length, consistency, and complexity of syllable structure. Overall, the results showed that reading training did not improve spelling; however, the children who participated in the copy training condition improved their spelling skills.

  15. Computer-assisted scan protocol and reconstruction (CASPAR)-reduction of image noise and patient dose.

    Science.gov (United States)

    Sperl, Jonathan; Beque, Dirk; Claus, Bernhard; De Man, Bruno; Senzig, Bob; Brokate, Martin

    2010-03-01

    X-ray computed tomography is a powerful medical imaging device. It allows high-resolution 3-D visualization of the human body. However, one drawback is the health risk associated with ionizing radiation. Simply downscaling the radiation intensities over the entire scan results in increased quantum noise. This paper proposes the concept of computer-assisted scan protocol and reconstruction. More specifically, we propose a method to compute patient and task-specific intensity profiles that achieve an optimal tradeoff between radiation dose and image quality. Therefore, reasonable image variance and dose metrics are derived. Conventional third-generation systems as well as inverted geometry concepts are considered. Two dose/noise minimization problems are formulated and solved by an efficient algorithm providing optimized milliampere (mA)-profiles. Thorax phantom simulations demonstrate the promising advantage of this technique: in this particular example, the dose is reduced by 53% for third-generation systems and by 86% for an inverted geometry in comparison to a sinusoidal mA-profile at a constant upper noise limit.

  16. Multiple Sclerosis: Identification of Temporal Changes in Brain Lesions with Computer-Assisted Detection Software

    Science.gov (United States)

    Bilello, M.; Arkuszewski, M.; Nucifora, P.; Nasrallah, I.; Melhem, E.R.; Cirillo, L.; Krejza, J.

    2013-01-01

    Multiple sclerosis (MS) is a chronic disease with a progressing and evolving course. Serial imaging with MRI is the mainstay in monitoring and managing MS patients. In this work we demonstrate the performance of a locally developed computer-assisted detection (CAD) software used to track temporal changes in brain MS lesions. CAD tracks changes in T2-bright MS lesions between two time points on a 3D high-resolution isotropic FLAIR MR sequence of the brain acquired at 3 Tesla. The program consists of an image-processing pipeline, and displays scrollable difference maps used as an aid to the neuroradiologist for assessing lesional change. To assess the value of the software we have compared diagnostic accuracy and duration of interpretation of the CAD-assisted and routine clinical interpretations in 98 randomly chosen, paired MR examinations from 88 patients (68 women, 20 men, mean age 43.5, age range 21–75) with a diagnosis of definite MS. The ground truth was determined by a three-expert panel. In case-wise analysis, CAD interpretation showed higher sensitivity than a clinical report (87% vs 77%, respectively). Lesion-wise analysis demonstrated improved sensitivity of CAD over a routine clinical interpretation of 40%–48%. Mean software-assisted interpretation time was 2.7 min. Our study demonstrates the potential of including CAD software in the workflow of neuroradiology practice for the detection of MS lesional change. Automated quantification of temporal change in MS lesion load may also be used in clinical research, e.g., in drug trials. PMID:23859235

  17. Effect of Computer-Assisted Learning on Students' Dental Anatomy Waxing Performance.

    Science.gov (United States)

    Kwon, So Ran; Hernández, Marcela; Blanchette, Derek R; Lam, Matthew T; Gratton, David G; Aquilino, Steven A

    2015-09-01

    The aim of this study was to evaluate the impact of computer-assisted learning on first-year dental students' waxing abilities and self-evaluation skills. Additionally, this study sought to determine how well digital evaluation software performed compared to faculty grading with respect to students' technical scores on a practical competency examination. First-year students at one U.S. dental school were assigned to one of three groups: control (n=40), E4D Compare (n=20), and Sirona prepCheck (n=19). Students in the control group were taught by traditional teaching methodologies, and the technology-assisted groups received both traditional training and supplementary feedback from the corresponding digital system. Five outcomes were measured: visual assessment score, self-evaluation score, and digital assessment scores at 0.25 mm, 0.30 mm, and 0.35 mm tolerance. The scores from visual assessment and self-evaluation were examined for differences among groups using the Kruskal-Wallis test. Correlation between the visual assessment and digital scores was measured using Pearson and Spearman rank correlation coefficients. At completion of the course, students were asked to complete a survey on the use of these digital technologies. All 79 students in the first-year class participated in the study, for a 100% response rate. The results showed that the visual assessment and self-evaluation scores did not differ among groups (p>0.05). Overall correlations between visual and digital assessment scores were modest though statistically significant (5% level of significance). Analysis of survey responses completed by students in the technology groups showed that profiles for the two groups were similar and not favorable towards digital technology. The study concluded that technology-assisted training did not affect these students' waxing performance or self-evaluation skills and that visual scores given by faculty and digital assessment scores correlated moderately.

  18. Non invasive Brain-Computer Interface system: towards its application as assistive technology

    Science.gov (United States)

    Cincotti, Febo; Mattia, Donatella; Aloise, Fabio; Bufalari, Simona; Schalk, Gerwin; Oriolo, Giuseppe; Cherubini, Andrea; Marciani, Maria Grazia; Babiloni, Fabio

    2010-01-01

    The quality of life of people suffering from severe motor disabilities can benefit from the use of current assistive technology capable of ameliorating communication, house-environment management and mobility, according to the user's residual motor abilities. Brain Computer Interfaces (BCIs) are systems that can translate brain activity into signals that control external devices. Thus they can represent the only technology for severely paralyzed patients to increase or maintain their communication and control options. Here we report on a pilot study in which a system was implemented and validated to allow disabled persons to improve or recover their mobility (directly or by emulation) and communication within the surrounding environment. The system is based on a software controller that offers to the user a communication interface that is matched with the individual's residual motor abilities. Patients (n=14) with severe motor disabilities due to progressive neurodegenerative disorders were trained to use the system prototype under a rehabilitation program carried out in a house-like furnished space. All users utilized regular assistive control options (e.g., microswitches or head trackers). In addition, four subjects learned to operate the system by means of a non-invasive EEG-based BCI. This system was controlled by the subjects' voluntary modulations of EEG sensorimotor rhythms recorded on the scalp; this skill was learnt even though the subjects have not had control over their limbs for a long time. We conclude that such a prototype system, which integrates several different assistive technologies including a BCI system, can potentially facilitate the translation from pre-clinical demonstrations to a clinical useful BCI. PMID:18394526

  19. Treatment of congenital radial head dislocation with a computer-assisted hexapod external fixator: A case report

    Directory of Open Access Journals (Sweden)

    Özgür Karakoyun

    2015-09-01

    Full Text Available Congenital dislocation of the radial head (CDRH, a congenital anomaly of the elbow, can cause symptoms such as joint stiffness, snapping, locking, or pain, however the diagnosis is sometimes made incidentally from x-rays. The treatment goal is to ameliorate the symptoms and obtain a joint with a full range of motion. This paper presents a case of unilateral CDRH that was asymptomatic until adolescence, when locking and snapping developed. Several treatment options are described in the literature. Although the conventional and computer-assisted external fixator systems are used in several clinical pictures such as extremity deformities, joint contractures and fixation of acute fractures etc a computer-assisted external fixator system has not been used for CDRH. We successfully performed ulnar dorsal translation and a lengthening osteotomy with a computer-assisted external fixator to reduce the radial head indirectly and had satisfactory functional and clinical results. J Clin Exp Invest 2015; 6 (3: 301-305

  20. Computer-assisted sperm analysis parameters in young fertile sperm donors and relationship with age.

    Science.gov (United States)

    Fréour, Thomas; Jean, Miguel; Mirallie, Sophie; Barriere, Paul

    2012-04-01

    Sperm parameter values have been shown to decline with age, according to conventional sperm analysis. However, the effect of age on sperm kinematic parameters has been rarely studied, especially in young fertile men. Here, we studied Computer-Assisted Sperm Analysis (CASA) parameters in a large cohort of men with proven fertility, in order to determine if there is a decline with age in this young fertile population. This retrospective analysis of CASA parameters was conducted on all donors included in the sperm donor programme in the Assisted Reproductive Techniques (ART) Centre of the University Hospital of Nantes between 2006 and 2009. Sperm concentration, motility, and kinetic parameters were recorded by a HTM-Ceros system and compared in 3 groups of sperm donors according to their age: donors were analyzed. Values for ALH, VCL, LIN, and STR significantly decreased with age. Sperm concentration, motile sperm proportion, and other kinetic parameters did not differ significantly among the groups. The use of CASA allowed the identification of ALH, VCL, LIN, and STR age-related decrease in young men with proven fertility.

  1. A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in radio frequency plasmas

    CERN Document Server

    Daksha, M; Schuengel, E; Korolov, I; Derzsi, A; Koepke, M; Donko, Z; Schulze, J

    2016-01-01

    A Computationally Assisted Spectroscopic Technique to measure secondary electron emission coefficients ($\\gamma$-CAST) in capacitively-coupled radio-frequency plasmas is proposed. This non-intrusive, sensitive diagnostic is based on a combination of Phase Resolved Optical Emission Spectroscopy and particle-based kinetic simulations. In such plasmas (under most conditions in electropositive gases) the spatio-temporally resolved electron-impact excitation/ionization rate features two distinct maxima adjacent to each electrode at different times within each RF period. While one maximum is the consequence of the energy gain of electrons due to sheath expansion, the second maximum is produced by secondary electrons accelerated towards the plasma bulk by the sheath electric field at the time of maximum voltage drop across the adjacent sheath. Due to these different excitation/ionization mechanisms, the ratio of the intensities of these maxima is very sensitive to the secondary electron emission coefficient $\\gamma$...

  2. Learning Analytics: The next frontier for computer assisted language learning in big data age

    Directory of Open Access Journals (Sweden)

    Yu Qinglan

    2015-01-01

    Full Text Available Learning analytics (LA has been applied to various learning environments, though it is quite new in the field of computer assisted language learning (CALL. This article attempts to examine the application of learning analytics in the upcoming big data age. It starts with an introduction and application of learning analytics in other fields, followed by a retrospective review of historical interaction between learning and media in CALL, and a penetrating analysis on why people would go to learning analytics to increase the efficiency of foreign language education. As approved in previous research, new technology, including big data mining and analysis, would inevitably enhance the learning of foreign languages. Potential changes that learning analytics would bring to Chinese foreign language education and researches are also presented in the article.

  3. Cognitive style and Computer-Assisted Learning: problems and a possible solution

    Directory of Open Access Journals (Sweden)

    John A. Clarke

    1993-12-01

    Full Text Available Although the notion of cognitive style has been around for some time, only in relatively recent times has there been a research interest in examining its effect on the performance of Computer-Assisted Learning (CAL users. There are a number of practical difficulties associated with catering for different cognitive styles of CAL users. This paper identifies not only a style which influences CAL-user performance and overcomes many of the difficulties, but also a possible suitable measure of that style. Data on the reliability of this measure is reported, along with preliminary work on its use to cater for CAL users with different cognitive styles. Future work will focus on the development of the package and the predictive validity of the style measure.

  4. WHAT CAN COMPUTER ASSISTED LANGUAGE LEARNING CONTRIBUTE TO FOREIGN LANGUAGE PEDAGOGY?

    Directory of Open Access Journals (Sweden)

    Paul Bangs

    2004-06-01

    Full Text Available The aim of this paper is twofold. On one hand, to shed new light on the uneasy relationship of Computer Assisted Language Learning (CALL with foreign language (FL pedagogy in the past and on the other, to explore the possible contribution of CALL to FL pedagogy. The first part of this research starts with a brief description of the first CALL experiences (behaviourist CALL and continues with a succinct account of the present state of the art (CALL and the communicative environment. The second part of the paper points towards new and challenging directions of CALL: some assertions as to what might constitute the place of "good CALL in a language learning environment.

  5. Computer-assisted anterior cruciate ligament reconstruction. Four generations of development and usage.

    Science.gov (United States)

    Klos, Tiburtius V S

    2014-12-01

    The purpose of this paper is to review the literature about the contribution of navigation in anterior cruciate ligament (ACL) reconstruction. The evolution of computer-assisted surgery (CAS) for ACL reconstruction has undergone several steps. These steps were divided into 4 subsequent developments: (1) positioning of ACL graft placement; (2) laxity measurement of ACL reconstruction (quality control); (3) kinematic evaluation during ACL reconstruction (navigated pivot shift); (4) case-specific individual ACL reconstruction with adjustments and additional reconstruction options. CAS has shown to improve femoral tunnel positioning, even if clinical outcomes do not improve results of manual techniques. CAS technology has helped researchers better understand the effects of different ACL reconstruction techniques and bundles replacements on joint laxity and to describe tunnel positioning in relation to native ACL insertion. CAS in ACL surgery can improve results at time zero and can improve knowledge in this field.

  6. Computer assisted active learning system development for critical thinking in history of civilization

    Directory of Open Access Journals (Sweden)

    Adem Karahoca

    2010-03-01

    Full Text Available This study investigates a Computer Assisted Learning System (CALS according to the several factors that promote flow wherestudents are fully involved into the learning activities for history of civilization lessons. The designed CALS supported bymeta – cognitive (cognitive maps and multimedia tools (movies, flash cards and quiz applications that help students to reacha flow state in learning by actively by engaging students’ critical thinking and providing an environment for active participation.The research data was collected using focus group surveys from a randomly selected 54 students enrolled in history ofcivilization at Bahcesehir University in Istanbul, Turkey. Results showed that 53.7% of students can be in flow via implementedCALS. Also according to the results, the flow has significant predictors in the course enjoyment, perceived competence ofcourse, value–usefulness and the challenge–learning style match according to nature of course in such a CALS.

  7. Computer-assisted three-dimensional surgical planning: 3D virtual articulator: technical note.

    Science.gov (United States)

    Ghanai, S; Marmulla, R; Wiechnik, J; Mühling, J; Kotrikova, B

    2010-01-01

    This study presents a computer-assisted planning system for dysgnathia treatment. It describes the process of information gathering using a virtual articulator and how the splints are constructed for orthognathic surgery. The deviation of the virtually planned splints is shown in six cases on the basis of conventionally planned cases. In all cases the plaster models were prepared and scanned using a 3D laser scanner. Successive lateral and posterior-anterior cephalometric images were used for reconstruction before surgery. By identifying specific points on the X-rays and marking them on the virtual models, it was possible to enhance the 2D images to create a realistic 3D environment and to perform virtual repositioning of the jaw. A hexapod was used to transfer the virtual planning to the real splints. Preliminary results showed that conventional repositioning could be replicated using the virtual articulator.

  8. Computer Assisted Audit Techniques and Audit Quality in Developing Countries: Evidence from Nigeria

    Directory of Open Access Journals (Sweden)

    Omonuk JB

    2015-12-01

    Full Text Available Most business organizations world-over have computerized their accounting systems. Extant literature finds that the use of Computer Assisted Audit Techniques (CAATs is positively related to the quality of audit reports. CAATs are widely applied to audit financial statements in developed countries. However, there is a void in literature about the audit of computerized accounts in developing countries. We draw a sample from Nigeria to investigate the following questions, “Do auditors effectively audit computerized accounts and; Is there a positive relationship between the use of CAATs and audit quality?” Using descriptive statistics, correlation analysis and logistic multiple regression, we provide evidence that: (1 CAATs are effectively used, (2 there is a positive relationship between the use of CAATS and audit quality, and (3 in a sample that excludes the big 4 International audit firms, local Nigerian firms are not effective in applying CAATs, and so, do not produce quality audit reports.

  9. Collocational Relations in Japanese Language Textbooks and Computer-Assisted Language Learning Resources

    Directory of Open Access Journals (Sweden)

    Irena SRDANOVIĆ

    2011-05-01

    Full Text Available In this paper, we explore presence of collocational relations in the computer-assisted language learning systems and other language resources for the Japanese language, on one side, and, in the Japanese language learning textbooks and wordlists, on the other side. After introducing how important it is to learn collocational relations in a foreign language, we examine their coverage in the various learners’ resources for the Japanese language. We particularly concentrate on a few collocations at the beginner’s level, where we demonstrate their treatment across various resources. A special attention is paid to what is referred to as unpredictable collocations, which have a bigger foreign language learning-burden than the predictable ones.

  10. Cosmetic and aesthetic skin photosurgery using a computer-assisted CO2 laser-scanning system

    Science.gov (United States)

    Dutu, Doru C. A.; Dumitras, Dan C.; Nedelcu, Ioan; Ghetie, Sergiu D.

    1997-12-01

    Since the first application of CO2 laser in skin photosurgery, various techniques such as laser pulsing, beam scanning and computer-assisted laser pulse generator have been introduced for the purpose of reducing tissue carbonization and thermal necrosis. Using a quite simple XY optical scanner equipped with two galvanometric driven mirrors and an appropriate software to process the scanning data and control the interaction time and energy density in the scanned area, we have obtained a device which can improve CO2 laser application in cosmetic and aesthetic surgery. The opto-mechanical CO2 laser scanner based on two total reflecting flat mirrors placed at 90 degree(s) in respect to the XY scanning directions and independently driven through a magnetic field provides a linear movement of the incident laser beam in the operating field. A DA converter supplied with scanning data by the software enables a scanning with linearity better than 1% for a maximum angular deviation of 20 degree(s). Because the scanning quality of the laser beam in the operating field is given not only by the displacement function of the two mirrors, but also by the beam characteristics in the focal plane and the cross distribution in the laser beam, the surgeon can control through software either the scanning field dimensions or the distance between two consecutive points of the vertically and/or horizontally sweep line. The development of computer-assisted surgical scanning techniques will help control the surgical laser, to create either a reproducible incision with a controlled depth or a controlled incision pattern with minimal incision width, a long desired facility for plastic surgery, neurosurgery, ENT and dentistry.

  11. An Evaluation of a Smartphone–Assisted Behavioral Weight Control Intervention for Adolescents: Pilot Study

    Science.gov (United States)

    Duncombe, Kristina M; Lott, Mark A; Hunsaker, Sanita L; Duraccio, Kara M; Woolford, Susan J

    2016-01-01

    Background The efficacy of adolescent weight control treatments is modest, and effective treatments are costly and are not widely available. Smartphones may be an effective method for delivering critical components of behavioral weight control treatment including behavioral self-monitoring. Objective To examine the efficacy and acceptability of a smartphone assisted adolescent behavioral weight control intervention. Methods A total of 16 overweight or obese adolescents (mean age=14.29 years, standard deviation=1.12) received 12 weeks of combined treatment that consisted of weekly in-person group behavioral weight control treatment sessions plus smartphone self-monitoring and daily text messaging. Subsequently they received 12 weeks of electronic-only intervention, totaling 24 weeks of intervention. Results On average, participants attained modest but significant reductions in body mass index standard score (zBMI: 0.08 standard deviation units, t (13)=2.22, P=.04, d=0.63) over the in-person plus electronic-only intervention period but did not maintain treatment gains over the electronic-only intervention period. Participants self-monitored on approximately half of combined intervention days but less than 20% of electronic-only intervention days. Conclusions Smartphones likely hold promise as a component of adolescent weight control interventions but they may be less effective in helping adolescents maintain treatment gains after intensive interventions. PMID:27554704

  12. CAVASS: a computer-assisted visualization and analysis software system - image processing aspects

    Science.gov (United States)

    Udupa, Jayaram K.; Grevera, George J.; Odhner, Dewey; Zhuge, Ying; Souza, Andre; Mishra, Shipra; Iwanaga, Tad

    2007-03-01

    The development of the concepts within 3DVIEWNIX and of the software system 3DVIEWNIX itself dates back to the 1970s. Since then, a series of software packages for Computer Assisted Visualization and Analysis (CAVA) of images came out from our group, 3DVIEWNIX released in 1993, being the most recent, and all were distributed with source code. CAVASS, an open source system, is the latest in this series, and represents the next major incarnation of 3DVIEWNIX. It incorporates four groups of operations: IMAGE PROCESSING (including ROI, interpolation, filtering, segmentation, registration, morphological, and algebraic operations), VISUALIZATION (including slice display, reslicing, MIP, surface rendering, and volume rendering), MANIPULATION (for modifying structures and surgery simulation), ANALYSIS (various ways of extracting quantitative information). CAVASS is designed to work on all platforms. Its key features are: (1) most major CAVA operations incorporated; (2) very efficient algorithms and their highly efficient implementations; (3) parallelized algorithms for computationally intensive operations; (4) parallel implementation via distributed computing on a cluster of PCs; (5) interface to other systems such as CAD/CAM software, ITK, and statistical packages; (6) easy to use GUI. In this paper, we focus on the image processing operations and compare the performance of CAVASS with that of ITK. Our conclusions based on assessing performance by utilizing a regular (6 MB), large (241 MB), and a super (873 MB) 3D image data set are as follows: CAVASS is considerably more efficient than ITK, especially in those operations which are computationally intensive. It can handle considerably larger data sets than ITK. It is easy and ready to use in applications since it provides an easy to use GUI. The users can easily build a cluster from ordinary inexpensive PCs and reap the full power of CAVASS inexpensively compared to expensive multiprocessing systems which are less

  13. In Situ Ecophysiology of Microbial Biofilm Communities Analyzed by CMEIAS Computer-Assisted Microscopy at Single-Cell Resolution

    Directory of Open Access Journals (Sweden)

    Youssef G. Yanni

    2013-06-01

    Full Text Available This paper describes the utility of CMEIAS (Center for Microbial Ecology Image Analysis System computer-assisted microscopy to extract data from accurately segmented images that provide 63 different insights into the ecophysiology of microbial populations and communities within biofilms and other habitats. Topics include quantitative assessments of: (i morphological diversity as an indicator of impacts that substratum physicochemistries have on biofilm community structure and dominance-rarity relationships among populations; (ii morphotype-specific distributions of biovolume body size that relate microbial allometric scaling, metabolic activity and growth physiology; (iii fractal geometry of optimal cellular positioning for efficient utilization of allocated nutrient resources; (iv morphotype-specific stress responses to starvation, environmental disturbance and bacteriovory predation; (v patterns of spatial distribution indicating positive and negative cell–cell interactions affecting their colonization behavior; and (vi significant methodological improvements to increase the accuracy of color-discriminated ecophysiology, e.g., differentiation of cell viability based on cell membrane integrity, cellular respiratory activity, phylogenetically differentiated substrate utilization, and N-acyl homoserine lactone-mediated cell–cell communication by bacteria while colonizing plant roots. The intensity of these ecophysiological attributes commonly varies at the individual cell level, emphasizing the importance of analyzing them at single-cell resolution and the proper spatial scale at which they occur in situ.

  14. Computer-assisted preoperative simulation for positioning of plate fixation in Lefort I osteotomy: A case report.

    Science.gov (United States)

    Suenaga, Hideyuki; Taniguchi, Asako; Yonenaga, Kazumichi; Hoshi, Kazuto; Takato, Tsuyoshi

    2016-06-01

    Computed tomography images are used for three-dimensional planning in orthognathic surgery. This facilitates the actual surgery by simulating the surgical scenario. We performed a computer-assisted virtual orthognathic surgical procedure using optically scanned three-dimensional (3D) data and real computed tomography data on a personal computer. It helped maxillary bone movement and positioning and the titanium plate temporary fixation and positioning. This simulated the surgical procedure, which made the procedure easy, and we could perform precise actual surgery and could forecast the postsurgery outcome. This simulation method promises great potential in orthognathic surgery to help surgeons plan and perform operative procedures more precisely.

  15. Supporting Negotiation Behavior with Haptics-Enabled Human-Computer Interfaces

    OpenAIRE

    Küçükyılmaz, Ayşe; Sezgin, Tevfik Metin; Başdoğan, Çağatay

    2012-01-01

    An active research goal for human-computer interaction is to allow humans to communicate with computers in an intuitive and natural fashion, especially in real-life interaction scenarios. One approach that has been advocated to achieve this has been to build computer systems with human-like qualities and capabilities. In this paper, we present insight on how human-computer interaction can be enriched by employing the computers with behavioral patterns that naturally appear in human-human nego...

  16. Computational Modeling of Uncertainty Avoidance in Consumer Behavior

    NARCIS (Netherlands)

    Roozmand, O.; Ghasem-Aghaee, N.; Nematbakhsh, M.A.; Baraani, A.; Hofstede, G.J.

    2011-01-01

    Human purchasing behavior is affected by many influential factors. Culture at macro-level and personality at micro-level influence consumer purchasing behavior. People of different cultures tend to accept the values of their own group and consequently have different purchasing behavior. Also, people

  17. [A new concept in digestive surgery: the computer assisted surgical procedure, from virtual reality to telemanipulation].

    Science.gov (United States)

    Marescaux, J; Clément, J M; Nord, M; Russier, Y; Tassetti, V; Mutter, D; Cotin, S; Ayache, N

    1997-11-01

    Surgical simulation increasingly appears to be an essential aspect of tomorrow's surgery. The development of a hepatic surgery simulator is an advanced concept calling for a new writing system which will transform the medical world: virtual reality. Virtual reality extends the perception of our five senses by representing more than the real state of things by the means of computer sciences and robotics. It consists of three concepts: immersion, navigation and interaction. Three reasons have led us to develop this simulator: the first is to provide the surgeon with a comprehensive visualisation of the organ. The second reason is to allow for planning and surgical simulation that could be compared with the detailed flight-plan for a commercial jet pilot. The third lies in the fact that virtual reality is an integrated part of the concept of computer assisted surgical procedure. The project consists of a sophisticated simulator which has to include five requirements: visual fidelity, interactivity, physical properties, physiological properties, sensory input and output. In this report we will describe how to get a realistic 3D model of the liver from bi-dimensional 2D medical images for anatomical and surgical training. The introduction of a tumor and the consequent planning and virtual resection is also described, as are force feedback and real-time interaction.

  18. Coverage planning in computer-assisted ablation based on Genetic Algorithm.

    Science.gov (United States)

    Ren, Hongliang; Guo, Weian; Sam Ge, Shuzhi; Lim, Wancheng

    2014-06-01

    An ablation planning system plays a pivotal role in tumor ablation procedures, as it provides a dry run to guide the surgeons in a complicated anatomical environment. Over-ablation, over-perforation or under-ablation may result in complications during the treatments. An optimal solution is desired to have complete tumor coverage with minimal invasiveness, including minimal number of ablations and minimal number of perforation trajectories. As the planning of tumor ablation is a multi-objective problem, it is challenging to obtain optimal covering solutions based on clinician׳s experiences. Meanwhile, it is effective for computer-assisted systems to decide a set of optimal plans. This paper proposes a novel approach of integrating a computational optimization algorithm into the ablation planning system. The proposed ablation planning system is designed based on the following objectives: to achieve complete tumor coverage and to minimize the number of ablations, number of needle trajectories and over-ablation to the healthy tissue. These objectives are taken into account using a Genetic Algorithm, which is capable of generating feasible solutions within a constrained search space. The candidate ablation plans can be encoded in generations of chromosomes, which subsequently evolve based on a fitness function. In this paper, an exponential weight-criterion fitness function has been designed by incorporating constraint parameters that were reflective of the different objectives. According to the test results, the proposed planner is able to generate the set of optimal solutions for tumor ablation problem, thereby fulfilling the aforementioned multiple objectives.

  19. Computer assisted chronic disease management: does it work? A pilot study using mixed methods.

    Science.gov (United States)

    Jones, Kay M; Biezen, Ruby; Piterman, Leon

    2013-01-01

    Background. Key factors for the effective chronic disease management (CDM) include the availability of practical and effective computer tools and continuing professional development/education. This study tested the effectiveness of a computer assisted chronic disease management tool, a broadband-based service known as cdmNet in increasing the development of care plans for patients with chronic disease in general practice. Methodology. Mixed methods are the breakthrough series methodology (workshops and plan-do-study-act cycles) and semistructured interviews. Results. Throughout the intervention period a pattern emerged suggesting GPs use of cdmNet initially increased, then plateaued practice nurses' and practice managers' roles expanded as they became more involved in using cdmNet. Seven main messages emerged from the GP interviews. Discussion. The overall use of cdmNet by participating GPs varied from "no change" to "significant change and developing many the GPMPs (general practice management plans) using cdmNet." The variation may be due to several factors, not the least, allowing GPs adequate time to familiarise themselves with the software and recognising the benefit of the team approach. Conclusion. The breakthrough series methodology facilitated upskilling GPs' management of patients diagnosed with a chronic disease and learning how to use the broadband-based service cdmNet.

  20. To Assist Geography Learning with Computers%计算机辅助地理学习

    Institute of Scientific and Technical Information of China (English)

    薛爱华

    2001-01-01

    信息爆炸给教育带来了巨大的冲击,计算机技术已经成为现代信息社会的核心技术。只有正确认识计算机辅助地理学习(CALG)的含义和特点;把握CALG软件的类别和适用的教学形式;明确CALG发展的制约因素*及其在地理教育发展中的意义和前景,才能更好地开展计算机辅助地理学习,CALG才能够真正具有生命力。%With the development of computer technology,it is possible to assist geography-learning with computers. Teachers of geography should have a clear conception about CALG and try to make course wares to be used in teaching. CALG is of great help and use in teaching geography.

  1. Computer-Assisted Classification Patterns in Autoimmune Diagnostics: The AIDA Project

    Directory of Open Access Journals (Sweden)

    Amel Benammar Elgaaied

    2016-01-01

    Full Text Available Antinuclear antibodies (ANAs are significant biomarkers in the diagnosis of autoimmune diseases in humans, done by mean of Indirect ImmunoFluorescence (IIF method, and performed by analyzing patterns and fluorescence intensity. This paper introduces the AIDA Project (autoimmunity: diagnosis assisted by computer developed in the framework of an Italy-Tunisia cross-border cooperation and its preliminary results. A database of interpreted IIF images is being collected through the exchange of images and double reporting and a Gold Standard database, containing around 1000 double reported images, has been settled. The Gold Standard database is used for optimization of a CAD (Computer Aided Detection solution and for the assessment of its added value, in order to be applied along with an Immunologist as a second Reader in detection of autoantibodies. This CAD system is able to identify on IIF images the fluorescence intensity and the fluorescence pattern. Preliminary results show that CAD, used as second Reader, appeared to perform better than Junior Immunologists and hence may significantly improve their efficacy; compared with two Junior Immunologists, the CAD system showed higher Intensity Accuracy (85,5% versus 66,0% and 66,0%, higher Patterns Accuracy (79,3% versus 48,0% and 66,2%, and higher Mean Class Accuracy (79,4% versus 56,7% and 64.2%.

  2. Cognitive mechanisms underlying Armoni: a computer-assisted cognitive training programme for individuals with intellectual disabilities

    Directory of Open Access Journals (Sweden)

    Claudia Peñaloza

    2016-01-01

    Full Text Available Although a number of cognitive deficits have been described in individuals with intellectual disabilities (ID, few studies have examined the use of computer-assisted cognitive training programmes in this group of people. This study sought to determine the cognitive mechanisms underlying 16 activities included in Armoni, a computerized cognitive training programme for individuals with ID, in order to validate its use with this population. Fifty adults with ID from four residential care centres in Spain underwent neuropsychological testing tapping attention, verbal memory, visual memory, comprehension, visuoperception, visuoconstruction, naming ability, verbal fluency, verbal reasoning and motor function. In addition, they performed 16 activities included in the Armoni programme. The relationships between cognitive function and the computer-based activities were assessed using Spearman correlations. Stepwise multiple regression analyses were then used to explore how cognitive function predicted the performance of individuals with ID on the programme activities. Most programme activities correlated with visuoconstruction, comprehension and naming ability. Naming ability, visual memory, comprehension and visuoconstruction contributed the most to the predictive models regarding performance on the Armoni activities. Our findings support the validity of Armoni for cognitive training in individuals with ID.

  3. Retrieval in a Computer-assisted Pathology Encoding and Reporting System (CAPER).

    Science.gov (United States)

    Robboy, S J; Altshuler, B S; Chen, H Y

    1981-05-01

    A previous report described an online computer-assisted pathology encoding and reporting system (CAPER) developed at the Massachusetts General Hospital that accessions specimens, monitors their state of completion, produces all log books, and permits instantaneous display of all diagnoses rendered within a three-year period. The present report updates the functions currently available and describes a new function that enables the pathologist, independent of computer programmer support, to request complex, in-depth searches of the entire accumulated pathology data base, which at present contains in excess of 150,000 cases and 5,000,000 pieces of information. The pathologist can instruct the system to compare more than 30 types of data items through the development of Boolean expressions. The report also describes the test codes that were developed to reflect the work product of the surgical pathology division, form the basis for automated billing and compilation of monthly and yearly statistics, and are an integral part of the long-term data base for in-depth searches.

  4. Computer-Assisted Classification Patterns in Autoimmune Diagnostics: The AIDA Project.

    Science.gov (United States)

    Benammar Elgaaied, Amel; Cascio, Donato; Bruno, Salvatore; Ciaccio, Maria Cristina; Cipolla, Marco; Fauci, Alessandro; Morgante, Rossella; Taormina, Vincenzo; Gorgi, Yousr; Marrakchi Triki, Raja; Ben Ahmed, Melika; Louzir, Hechmi; Yalaoui, Sadok; Imene, Sfar; Issaoui, Yassine; Abidi, Ahmed; Ammar, Myriam; Bedhiafi, Walid; Ben Fraj, Oussama; Bouhaha, Rym; Hamdi, Khouloud; Soumaya, Koudhi; Neili, Bilel; Asma, Gati; Lucchese, Mariano; Catanzaro, Maria; Barbara, Vincenza; Brusca, Ignazio; Fregapane, Maria; Amato, Gaetano; Friscia, Giuseppe; Neila, Trai; Turkia, Souayeh; Youssra, Haouami; Rekik, Raja; Bouokez, Hayet; Vasile Simone, Maria; Fauci, Francesco; Raso, Giuseppe

    2016-01-01

    Antinuclear antibodies (ANAs) are significant biomarkers in the diagnosis of autoimmune diseases in humans, done by mean of Indirect ImmunoFluorescence (IIF) method, and performed by analyzing patterns and fluorescence intensity. This paper introduces the AIDA Project (autoimmunity: diagnosis assisted by computer) developed in the framework of an Italy-Tunisia cross-border cooperation and its preliminary results. A database of interpreted IIF images is being collected through the exchange of images and double reporting and a Gold Standard database, containing around 1000 double reported images, has been settled. The Gold Standard database is used for optimization of a CAD (Computer Aided Detection) solution and for the assessment of its added value, in order to be applied along with an Immunologist as a second Reader in detection of autoantibodies. This CAD system is able to identify on IIF images the fluorescence intensity and the fluorescence pattern. Preliminary results show that CAD, used as second Reader, appeared to perform better than Junior Immunologists and hence may significantly improve their efficacy; compared with two Junior Immunologists, the CAD system showed higher Intensity Accuracy (85,5% versus 66,0% and 66,0%), higher Patterns Accuracy (79,3% versus 48,0% and 66,2%), and higher Mean Class Accuracy (79,4% versus 56,7% and 64.2%).

  5. Adolescent differences in knee stability following computer-assisted anterior cruciate ligament reconstruction

    Directory of Open Access Journals (Sweden)

    Melissa A. Christino

    2014-12-01

    Full Text Available Anterior cruciate ligament (ACL surgery is being increasingly performed in the adolescent population. Computer navigation offers a reliable way to quantitatively measure knee stability during ACL reconstruction. A retrospective review of all adolescent patients (<18 years old who underwent computer-assisted primary single bundle ACL reconstruction by a single surgeon from 2007 to 2012 was performed. The average age was 15.8 years (SD 3.3. Female adolescents were found to have higher internal rotation than male adolescents both pre- (25.6° vs 21.7°, P=0.026 and post-reconstruction (20.1° vs 15.1°, P=0.005. Compared to adults, adolescents demonstrated significantly higher internal rotation both pre- (23.3° vs 21.5°, P=0.047 and post-reconstruction (17.1° vs 14.4°, P=0.003. They also had higher total rotation both pre- (40.9° vs 38.4°, P=0.02 and post-reconstruction when compared to adults (31.56° vs 28.67°, P=0.005. In adolescent patients, anterior translation was corrected more than rotation. Females had higher pre- and residual post-reconstruction internal rotation compared to males. When compared to adults, adolescents had increased internal rotation and total rotation both pre- and post-reconstruction. 

  6. An extended computational model of the circulatory system for designing ventricular assist devices.

    Science.gov (United States)

    Hsu, Po-Lin; Cheng, Sean J; Saumarez, Richard C; Dawes, William N; McMahon, Richard A

    2008-01-01

    An extended computational model of the circulatory system has been developed to predict blood flow in the presence of ventricular assist devices (VADs). A novel VAD, placed in the descending aorta, intended to offload the left ventricle (LV) and augment renal perfusion is being studied. For this application, a better understanding of the global hemodynamic response of the VAD, in essence an electrically driven pump, and the cardiovascular system is necessary. To meet this need, a model has been established as a nonlinear, lumped-parameter electrical analog, and simulated results under different states [healthy, congestive heart failure (CHF), and postinsertion of VAD] are presented. The systemic circulation is separated into five compartments and the descending aorta is composed of three components to accurately yield the system response of each section before and after the insertion of the VAD. Delays in valve closing time and blood inertia in the aorta were introduced to deliver a more realistic model. Pump governing equations and optimization are based on fundamental theories of turbomachines and can serve as a practical initial design point for rotary blood pumps. The model's results closely mimic established parameters for the circulatory system and confirm the feasibility of the intra-aortic VAD concept. This computational model can be linked with models of the pump motor to provide a valuable tool for innovative VAD design.

  7. Innovative approach in the development of computer assisted algorithm for spine pedicle screw placement.

    Science.gov (United States)

    Solitro, Giovanni F; Amirouche, Farid

    2016-04-01

    Pedicle screws are typically used for fusion, percutaneous fixation, and means of gripping a spinal segment. The screws act as a rigid and stable anchor points to bridge and connect with a rod as part of a construct. The foundation of the fusion is directly related to the placement of these screws. Malposition of pedicle screws causes intraoperative complications such as pedicle fractures and dural lesions and is a contributing factor to fusion failure. Computer assisted spine surgery (CASS) and patient-specific drill templates were developed to reduce this failure rate, but the trajectory of the screws remains a decision driven by anatomical landmarks often not easily defined. Current data shows the need of a robust and reliable technique that prevents screw misplacement. Furthermore, there is a need to enhance screw insertion guides to overcome the distortion of anatomical landmarks, which is viewed as a limiting factor by current techniques. The objective of this study is to develop a method and mathematical lemmas that are fundamental to the development of computer algorithms for pedicle screw placement. Using the proposed methodology, we show how we can generate automated optimal safe screw insertion trajectories based on the identification of a set of intrinsic parameters. The results, obtained from the validation of the proposed method on two full thoracic segments, are similar to previous morphological studies. The simplicity of the method, being pedicle arch based, is applicable to vertebrae where landmarks are either not well defined, altered or distorted.

  8. Computer-assisted lesion detection system for stomach screening using stomach shape and appearance models

    Science.gov (United States)

    Midoh, Y.; Nakamura, M.; Takashima, M.; Nakamae, K.; Fujioka, H.

    2007-03-01

    In Japan, stomach cancer is one of the three most common causes of death from cancer. Since periodic health checks of stomach X-rays have become more widely carried out, the physicians' burdens have been increasing in the mass screening to detect initial symptoms of a disease. For the purpose of automatic diagnosis, we try to develop a computer-assisted lesion detection system for stomach screening. The proposed system has two databases. One is the stomach shape database that consists of the computer graphics stomach 3D models based on biomechanics simulation and their projected 2D images. The other is the normal appearance database that is constructed by learning patterns in a normal patient training set. The stomach contour is extracted from an X-ray image including a barium filled region by the following steps. Firstly, the approximated stomach region is obtained by nonrigid registration based on mutual information. We define nonrigid transformation as one that includes translations, rotations, scaling, air-barium interface and weights of eigenvectors determined by principal components analysis in the stomach shape database. Secondly, the accurate stomach contour is extracted from the gradient of an image by using the Dynamic Programming. After then, stomach lesions are detected by inspecting whether the Mahalanobis distance from the mean in the normal appearance database is longer than a suitable value on the extracted stomach contour. We applied our system to 75 X-ray images of barium-filled stomach to show its validity.

  9. A comparative analysis of multi-level computer-assisted decision making systems for traumatic injuries

    Directory of Open Access Journals (Sweden)

    Huynh Toan

    2009-01-01

    Full Text Available Abstract Background This paper focuses on the creation of a predictive computer-assisted decision making system for traumatic injury using machine learning algorithms. Trauma experts must make several difficult decisions based on a large number of patient attributes, usually in a short period of time. The aim is to compare the existing machine learning methods available for medical informatics, and develop reliable, rule-based computer-assisted decision-making systems that provide recommendations for the course of treatment for new patients, based on previously seen cases in trauma databases. Datasets of traumatic brain injury (TBI patients are used to train and test the decision making algorithm. The work is also applicable to patients with traumatic pelvic injuries. Methods Decision-making rules are created by processing patterns discovered in the datasets, using machine learning techniques. More specifically, CART and C4.5 are used, as they provide grammatical expressions of knowledge extracted by applying logical operations to the available features. The resulting rule sets are tested against other machine learning methods, including AdaBoost and SVM. The rule creation algorithm is applied to multiple datasets, both with and without prior filtering to discover significant variables. This filtering is performed via logistic regression prior to the rule discovery process. Results For survival prediction using all variables, CART outperformed the other machine learning methods. When using only significant variables, neural networks performed best. A reliable rule-base was generated using combined C4.5/CART. The average predictive rule performance was 82% when using all variables, and approximately 84% when using significant variables only. The average performance of the combined C4.5 and CART system using significant variables was 89.7% in predicting the exact outcome (home or rehabilitation, and 93.1% in predicting the ICU length of stay for

  10. CT-MR image data fusion for computer assisted navigated neurosurgery of temporal bone tumors

    Energy Technology Data Exchange (ETDEWEB)

    Nemec, Stefan Franz [Department of Radiology/Osteology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria)]. E-mail: stefan.nemec@meduniwien.ac.at; Donat, Markus Alexander [Department of Neurosurgery, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Mehrain, Sheida [Department of Radiology/Osteology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Friedrich, Klaus [Department of Radiology/Osteology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Krestan, Christian [Department of Radiology/Osteology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Matula, Christian [Department of Neurosurgery, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Imhof, Herwig [Department of Radiology/Osteology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Czerny, Christian [Department of Radiology/Osteology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria)

    2007-05-15

    Purpose: To demonstrate the value of multi detector computed tomography (MDCT) and magnetic resonance imaging (MRI) in the preoperative work up of temporal bone tumors and to present, especially, CT and MR image fusion for surgical planning and performance in computer assisted navigated neurosurgery of temporal bone tumors. Materials and methods: Fifteen patients with temporal bone tumors underwent MDCT and MRI. MDCT was performed in high-resolution bone window level setting in axial plane. The reconstructed MDCT slice thickness was 0.8 mm. MRI was performed in axial and coronal plane with T2-weighted fast spin-echo (FSE) sequences, un-enhanced and contrast-enhanced T1-weighted spin-echo (SE) sequences, and coronal T1-weighted SE sequences with fat suppression and with 3D T1-weighted gradient-echo (GE) contrast-enhanced sequences in axial plane. The 3D T1-weighted GE sequence had a slice thickness of 1 mm. Image data sets of CT and 3D T1-weighted GE sequences were merged utilizing a workstation to create CT-MR fusion images. MDCT and MR images were separately used to depict and characterize lesions. The fusion images were utilized for interventional planning and intraoperative image guidance. The intraoperative accuracy of the navigation unit was measured, defined as the deviation between the same landmark in the navigation image and the patient. Results: Tumorous lesions of bone and soft tissue were well delineated and characterized by CT and MR images. The images played a crucial role in the differentiation of benign and malignant pathologies, which consisted of 13 benign and 2 malignant tumors. The CT-MR fusion images supported the surgeon in preoperative planning and improved surgical performance. The mean intraoperative accuracy of the navigation system was 1.25 mm. Conclusion: CT and MRI are essential in the preoperative work up of temporal bone tumors. CT-MR image data fusion presents an accurate tool for planning the correct surgical procedure and is a

  11. Accuracy of treatment planning based on stereolithography in computer assisted surgery.

    Science.gov (United States)

    Schicho, Kurt; Figl, Michael; Seemann, Rudolf; Ewers, Rolf; Lambrecht, J Thomas; Wagner, Arne; Watzinger, Franz; Baumann, Arnulf; Kainberger, Franz; Fruehwald, Julia; Klug, Clemens

    2006-09-01

    Three-dimensional stereolithographic models (SL models), made of solid acrylic resin derived from computed-tomography (CT) data, are an established tool for preoperative treatment planning in numerous fields of medicine. An innovative approach, combining stereolithography with computer-assisted point-to-point navigation, can support the precise surgical realization of a plan that has been defined on an SL model preoperatively. The essential prerequisites for the application of such an approach are: (1) The accuracy of the SL models (including accuracy of the CT scan and correspondence of the model with the patient's anatomy) and (2) the registration method used for the transfer of the plan from the SL model to the patient (i.e., whether the applied registration markers can be added to the SL model corresponding to the markers at the patient with an accuracy that keeps the "cumulative error" at the end of the chain of errors, in the order of the accuracy of contemporary navigation systems). In this study, we focus on these two topics: By applying image-matching techniques, we fuse the original CT data of the patient with the corresponding CT data of the scanned SL model, and measure the deviations of defined parameter (e.g., distances between anatomical points). To evaluate the registration method used for the planning transfer, we apply a point-merge algorithm, using four marker points that should be located at exactly corresponding positions at the patient and at connective bars that are added to the surface of the SL model. Again, deviations at defined anatomical structures are measured and analyzed statistically. Our results prove sufficient correspondence of the two data sets and accuracy of the registration method for routine clinical application. The evaluation of the SL model accuracy revealed an arithmetic mean of the relative deviations from 0.8% to 5.4%, with an overall mean deviation of 2.2%. Mean deviations of the investigated anatomical structures

  12. Theorema 2.0: Computer-Assisted Natural-Style Mathematics

    Directory of Open Access Journals (Sweden)

    Bruno Buchberger

    2016-01-01

    Full Text Available The Theorema project aims at the development of a computer assistant for the working mathematician. Support should be given throughout all phases of mathematical activity, from introducing new mathematical concepts by definitions or axioms, through first (computational experiments, the formulation of theorems, their justification by an exact proof, the application of a theorem as an algorithm, until to the dissemination of the results in form of a mathematical publication, the build up of bigger libraries of certified mathematical content and the like. This ambitious project is exactly along the lines of the QED manifesto issued in 1994 (see e.g. http://www.cs.ru.nl/~freek/qed/qed.html and it was initiated in the mid-1990s by Bruno Buchberger. The Theorema system is a computer implementation of the ideas behind the Theorema project. One focus lies on the natural style of system input (in form of definitions, theorems, algorithms, etc., system output (mainly in form of mathematical proofs and user interaction. Another focus is theory exploration, i.e. the development of large consistent mathematical theories in a formal frame, in contrast to just proving single isolated theorems. When using the Theorema system, a user should not have to follow a certain style of mathematics enforced by the system (e.g. basing all of mathematics on set theory or certain variants of type theory, rather should the system support the user in her preferred flavour of doing math. The new implementation of the system, which we refer to as Theorema 2.0, is open-source and available through GitHub.

  13. A method for selection of appropriate assistive technology for computer access.

    Science.gov (United States)

    Jenko, Mojca; Matjacic, Zlatko; Vidmar, Gaj; Bester, Janez; Pogacnikb, Matevz; Zupan, Anton

    2010-12-01

    Assistive technologies (ATs) for computer access enable people with disabilities to be included in the information society. Current methods for assessment and selection of the most appropriate AT for each individual are non standardized, lengthy, subjective, and require substantial clinical experience of a multidisciplinary team.This manuscript presents and evaluates an objective approach to test and select an appropriate AT for computer access for people with disabilities. Six user interfaces(standard keyboard, mini and large joystick, mini and large trackball, and head-operated mouse and keyboard) were tested on the control group of 29 people without disabilities and on 63 people with neuromuscular and muscular diseases, using purpose-built software for testing the speed of sentence typing. Different criteria for selecting the optimal AT were tested and compared with the skilled clinician's choice. The learning curves of the people with disabilities proved to follow those of the healthy controls, but with lower performance. Daily computer use was not associated with AT selection, but corresponded nearly perfectly to the level of functional ability of upper limbs. Agreement between clinician's choice and learning-based AT selection was noteworthy,but far from perfect. If partial agreement was taken into account, that is, AT was considered as an ordinal variable based on the corresponding functional ability level, and the second best learning-based choice was taken into account,the agreement was high for highest median typing speed as AT selection criterion. In conclusion, the developed method for AT assessment and selection seems to be an efficient guide for an unskilled clinician to choose an appropriate AT.

  14. Evolving and Controlling Perimeter, Rendezvous, and Foraging Behaviors in a Computation-Free Robot Swarm

    Science.gov (United States)

    2016-04-01

    FORAGING BEHAVIORS IN A COMPUTATION-FREE ROBOT SWARM 5a. CONTRACT NUMBER IN-HOUSE 5b. GRANT NUMBER NA 5c. PROGRAM ELEMENT NUMBER 62788F 6...States. 14. ABSTRACT Designing and controlling simple collective robot behaviors often requires complex range and bearing sensors and peer- to-peer...communication strategies. Recent work studying swarms robots that have no computational power has shown that complex behaviors such as aggregation and

  15. The Relationship between Environmental Factors and Usage Behaviors at "Hole-in-the-Wall" Computers

    Science.gov (United States)

    DeBoer, Jennifer

    2009-01-01

    This paper gathers and analyzes self-reported user behavior data for public computers installed in varied neighborhoods in India to explore the relationship between environmental factors such as urbanicity and reported usage behaviors. There is evidence of large differences in usage behavior between urban and non-urban sites. Children at urban…

  16. Predicting AD conversion: comparison between prodromal AD guidelines and computer assisted PredictAD tool.

    Directory of Open Access Journals (Sweden)

    Yawu Liu

    Full Text Available To compare the accuracies of predicting AD conversion by using a decision support system (PredictAD tool and current research criteria of prodromal AD as identified by combinations of episodic memory impairment of hippocampal type and visual assessment of medial temporal lobe atrophy (MTA on MRI and CSF biomarkers.Altogether 391 MCI cases (158 AD converters were selected from the ADNI cohort. All the cases had baseline cognitive tests, MRI and/or CSF levels of Aβ1-42 and Tau. Using baseline data, the status of MCI patients (AD or MCI three years later was predicted using current diagnostic research guidelines and the PredictAD software tool designed for supporting clinical diagnostics. The data used were 1 clinical criteria for episodic memory loss of the hippocampal type, 2 visual MTA, 3 positive CSF markers, 4 their combinations, and 5 when the PredictAD tool was applied, automatically computed MRI measures were used instead of the visual MTA results. The accuracies of diagnosis were evaluated with the diagnosis made 3 years later.The PredictAD tool achieved the overall accuracy of 72% (sensitivity 73%, specificity 71% in predicting the AD diagnosis. The corresponding number for a clinician's prediction with the assistance of the PredictAD tool was 71% (sensitivity 75%, specificity 68%. Diagnosis with the PredictAD tool was significantly better than diagnosis by biomarkers alone or the combinations of clinical diagnosis of hippocampal pattern for the memory loss and biomarkers (p≤0.037.With the assistance of PredictAD tool, the clinician can predict AD conversion more accurately than the current diagnostic criteria.

  17. Evaluation of Imagine Learning English, a Computer-Assisted Instruction of Language and Literacy for Kindergarten Students

    Science.gov (United States)

    Longberg, Pauline Oliphant

    2012-01-01

    As computer assisted instruction (CAI) becomes increasingly sophisticated, its appeal as a viable method of literacy intervention with young children continues despite limited evidence of effectiveness. The present study sought to assess the impact of one such CAI program, "Imagine Learning English" (ILE), on both the receptive…

  18. Extending the Use of Spanish Computer-Assisted Anomia Rehabilitation Program (CARP-2) in People with Aphasia

    Science.gov (United States)

    Adrian, Jose A.; Gonzalez, Mercedes; Buiza, Juan J.; Sage, Karen

    2011-01-01

    Purpose: To extend the use of the Spanish Computer-assisted Anomia Rehabilitation Program (CARP-2) for anomia from a single case to a group of 15 people with aphasia. To evaluate whether the treatment is active (Phase 1) for this group (Robey & Schultz, 1998), providing potential explanations as to why. Methods: Fifteen participants with chronic…

  19. The effectiveness of a computer-assisted instruction programme on communication skills of medical specialists in oncology.

    NARCIS (Netherlands)

    Hulsman, R.L.; Ros, W.J.G.; Winnubst, J.A.M.; Bensing, J.M.

    2002-01-01

    Although doctor-patient communication is important in health care, medical specialists are generally not well trained in communication skills. Conventional training programmes are generally time consuming and hard to fit into busy working schedules of medical specialists. A computer-assisted instruc

  20. At Their Own Pace: Interim Findings from an Evaluation of a Computer-Assisted, Modular Approach to Developmental Math

    Science.gov (United States)

    Gardenhire, Alissa; Diamond, John; Headlam, Camielle; Weiss, Michael J.

    2016-01-01

    Community colleges nationwide are looking for solutions to help students complete developmental (remedial) math--a known barrier to graduation. Some are offering computer-assisted, modular developmental math courses that allow students to earn credits incrementally and move through the curriculum at their own pace. One of these modularized…

  1. Conceptual Model-Based Problem Solving That Facilitates Algebra Readiness: An Exploratory Study with Computer-Assisted Instruction

    Science.gov (United States)

    Xin, Yan Ping; Si, Luo; Hord, Casey; Zhang, Dake; Cetinas, Suleyman; Park, Joo Young

    2012-01-01

    The study explored the effects of a computer-assisted COnceptual Model-based Problem-Solving (COMPS) program on multiplicative word-problem-solving performance of students with learning disabilities or difficulties. The COMPS program emphasizes mathematical modeling with algebraic expressions of relations. Participants were eight fourth and fifth…

  2. The Effect of a Graph-Oriented Computer-Assisted Project-Based Learning Environment on Argumentation Skills

    Science.gov (United States)

    Hsu, P. -S.; Van Dyke, M.; Chen, Y.; Smith, T. J.

    2015-01-01

    The purpose of this quasi-experimental study was to explore how seventh graders in a suburban school in the United States developed argumentation skills and science knowledge in a project-based learning environment that incorporated a graph-oriented, computer-assisted application. A total of 54 students (three classes) comprised this treatment…

  3. Factors That Facilitate or Hinder the Use of Computer-Assisted Reading in the L2 Reading Classroom

    Science.gov (United States)

    Al-Seghayer, Khalid

    2016-01-01

    This study examined factors associated with whether instructors of English as a second or foreign language (ESL/EFL) incorporate computer-assisted reading (CAR) into their second-language (L2) reading classrooms. To achieve this goal, 70 ESL/EFL instructors completed a survey containing 37 items and 1 open-ended question concerning their…

  4. Effects of Computer-Assisted and Teacher-Led Fluency Instruction on Students at Risk for Reading Failure

    Science.gov (United States)

    Fenty, Nicole; Mulcahy, Candace; Washburn, Erin

    2015-01-01

    A quasi-experimental pretest/posttest group design was used to determine whether computer-assisted fluency instruction is as effective as print-based, teacher-led fluency instruction in improving fluency, vocabulary, and comprehension skills in third grade students experiencing delayed fluency development. Fifty participants were randomly assigned…

  5. Corpus of High School Academic Texts (COHAT): Data-Driven, Computer Assisted Discovery in Learning Academic English

    Science.gov (United States)

    Bohát, Róbert; Rödlingová, Beata; Horáková, Nina

    2015-01-01

    Corpus of High School Academic Texts (COHAT), currently of 150,000+ words, aims to make academic language instruction a more data-driven and student-centered discovery learning as a special type of Computer-Assisted Language Learning (CALL), emphasizing students' critical thinking and metacognition. Since 2013, high school English as an additional…

  6. A Comparison of Paper vs. Computer-Assisted Self Interview for School, Alcohol, Tobacco, and Other Drug Surveys.

    Science.gov (United States)

    Hallfors, Denise; Khatapoush, Shereen; Kadushin, Charles; Watson, Kim; Saxe, Leonard

    2000-01-01

    Examined whether computer assisted self-interview (CASI) alcohol, tobacco, and drug use surveys are feasible with 2,296 7th, 9th, and 11th graders in 2 communities. CASI surveys did not increase reported rates of substance abuse, but did improve the speed of data processing and decrease missing data. (SLD)

  7. Your Verbal Zone: An Intelligent Computer-Assisted Language Learning Program in Support of Turkish Learners' Vocabulary Learning

    Science.gov (United States)

    Esit, Omer

    2011-01-01

    This study investigated the effectiveness of an intelligent computer-assisted language learning (ICALL) program on Turkish learners' vocabulary learning. Within the scope of this research, an ICALL application with a morphological analyser (Your Verbal Zone, YVZ) was developed and used in an English language preparatory class to measure its…

  8. Lasting Effects on Literacy Skills with a Computer-Assisted Learning Using Syllabic Units in Low-Progress Readers

    Science.gov (United States)

    Ecalle, Jean; Magnan, Annie; Calmus, Caroline

    2009-01-01

    This study examines the effects of a computer-assisted learning (CAL) program in which syllabic units were highlighted inside words in comparison with a CAL program in which the words were not segmented, i.e. one requiring whole word recognition. In a randomised control trial design, two separate groups of French speaking poor readers (2 * 14) in…

  9. Computer-Assisted Language Learning (CALL) in support of (re-)learning native languages : The case of Runyakitara.

    NARCIS (Netherlands)

    Katushemererwe, Fridah; Nerbonne, John

    2015-01-01

    This study presents the results from a computer-assisted language learning (CALL) system of Runyakitara (RU_CALL). The major objective was to provide an electronic language learning environment that can enable learners with mother tongue deficiencies to enhance their knowledge of grammar and acquire

  10. Computer-Assisted Language Learning (CALL) in Support of (Re)-Learning Native Languages: The Case of Runyakitara

    Science.gov (United States)

    Katushemererwe, Fridah; Nerbonne, John

    2015-01-01

    This study presents the results from a computer-assisted language learning (CALL) system of Runyakitara (RU_CALL). The major objective was to provide an electronic language learning environment that can enable learners with mother tongue deficiencies to enhance their knowledge of grammar and acquire writing skills in Runyakitara. The system…

  11. The Effect of Computer-Assisted Learning Integrated with Metacognitive Prompts on Students' Affective Skills

    Science.gov (United States)

    Tatar, Nilgün; Akpinar, Ercan; Feyzioglu, Eylem Yildiz

    2013-01-01

    The purpose of this study is to investigate the effect of computer-assisted learning integrated with metacognitive prompts on elementary students' affective skills on the subject of electricity. The researchers developed educational software to enable students to easily and comprehensively learn the concepts in the subject of electricity. A…

  12. Free Computer-Based Assistive Technology to Support Students with High-Incidence Disabilities in the Writing Process

    Science.gov (United States)

    Bouck, Emily C.; Meyer, Nancy K.; Satsangi, Rajiv; Savage, Melissa N.; Hunley, Megan

    2015-01-01

    Written expression is a neglected but critical component of education; yet, the writing process--from prewriting, to writing, and postwriting--is often an area of struggle for students with disabilities. One strategy to assist students with disabilities struggling with the writing process is the use of computer-based technology. This article…

  13. Establishing Computer-Assisted Instruction to Teach Academics to Students with Autism as an Evidence-Based Practice

    Science.gov (United States)

    Root, Jenny R.; Stevenson, Bradley S.; Davis, Luann Ley; Geddes-Hall, Jennifer; Test, David W.

    2017-01-01

    Computer-assisted instruction (CAI) is growing in popularity and has demonstrated positive effects for students with disabilities, including those with autism spectrum disorder (ASD). In this review, criteria for group experimental and single case studies were used to determine quality (Horner et al., "Exceptional Children" 71:165-179,…

  14. Efficacy of Teachtown: Basics Computer-Assisted Intervention for the Intensive Comprehensive Autism Program in Los Angeles Unified School District

    Science.gov (United States)

    Whalen, Christina; Moss, Debbie; Ilan, Aaron B.; Vaupel, Manya; Fielding, Paul; MacDonald, Kevin; Cernich, Shannon; Symon, Jennifer

    2010-01-01

    Computer Assisted Instruction (CAI) has shown increased popularity recently and there are many studies showing promise for this approach for children with Autism Spectrum Disorders (ASD). However, there are no between-subject studies to date assessing the efficacy of CAI with this population. In this study, 47 preschool and K-1 students in ASD…

  15. Research and Practice of the System of Computer-assisted Oral English Test on a Large Scale

    Institute of Scientific and Technical Information of China (English)

    Bo Jiang

    2012-01-01

      The establishment of computer-assisted oral test system is one way to improve college students’ English communication skills. This thesis gives a brief analysis of how to set up a scientific system in colleges from the characters of oral activities,oral ability and its features,the patterns of English oral test and the abilities tested.

  16. A Computer-Assisted Instruction Course on Laboratory Detection of Malarial Parasites in Human Blood. Interim Report.

    Science.gov (United States)

    Mitzel, Harold E.

    In cooperation with the United States Navy, this project was undertaken to examine the feasibility of computer assisted instruction in clinical malaria recognition, to train a small group of Naval personnel in techniques of creating and presenting such material, and to evaluate the course by giving it to a representative sample of Naval medical…

  17. GenieTutor: A Computer Assisted Second-Language Learning System Based on Semantic and Grammar Correctness Evaluations

    Science.gov (United States)

    Kwon, Oh-Woog; Lee, Kiyoung; Kim, Young-Kil; Lee, Yunkeun

    2015-01-01

    This paper introduces a Dialog-Based Computer-Assisted second-Language Learning (DB-CALL) system using semantic and grammar correctness evaluations and the results of its experiment. While the system dialogues with English learners about a given topic, it automatically evaluates the grammar and content properness of their English utterances, then…

  18. Interface-assisted magnetoresistance behavior for ultrathin NiFe films

    Energy Technology Data Exchange (ETDEWEB)

    Jiang, Shao-Long; Chen, Xi; Yang, Kang [Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083 (China); Han, Gang [Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083 (China); Teng, Jiao; Li, Xu-Jing; Yang, Guang; Liu, Qian-Qian; Liu, Yi-Wei [Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083 (China); Ding, Lei [School of Materials and Chemical Engineering, Hainan University, Haikou 570228 (China); Yu, Guang-Hua, E-mail: ghyu@mater.ustb.edu.cn [Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083 (China)

    2015-11-01

    Interface-assisted magnetoresistance (MR) behavior has been studied in Ta/MgO/NiFe/MgO/Ta multilayers by inserting a Mg metal layer between the NiFe layer and the top MgO layer. It is shown that MR ratio is about 31% larger than that in the films without Mg insertion. X-ray photoelectron spectroscopy and high resolution transmission electron microscope analyses show that the enhanced MR is primarily ascribed to effective control of chemical states at the NiFe/MgO interface and crystallization of the top MgO layer. - Highlights: • We studied magnetic and electric transport properties of ultrathin NiFe films. • Interface chemical states have strong influence on MR in NiFe films. • Crystallization of the top MgO layer has influence on MR in NiFe films.

  19. Computer-assisted design for scaling up systems based on DNA reaction networks

    Science.gov (United States)

    Aubert, Nathanaël; Mosca, Clément; Fujii, Teruo; Hagiya, Masami; Rondelez, Yannick

    2014-01-01

    In the past few years, there have been many exciting advances in the field of molecular programming, reaching a point where implementation of non-trivial systems, such as neural networks or switchable bistable networks, is a reality. Such systems require nonlinearity, be it through signal amplification, digitalization or the generation of autonomous dynamics such as oscillations. The biochemistry of DNA systems provides such mechanisms, but assembling them in a constructive manner is still a difficult and sometimes counterintuitive process. Moreover, realistic prediction of the actual evolution of concentrations over time requires a number of side reactions, such as leaks, cross-talks or competitive interactions, to be taken into account. In this case, the design of a system targeting a given function takes much trial and error before the correct architecture can be found. To speed up this process, we have created DNA Artificial Circuits Computer-Assisted Design (DACCAD), a computer-assisted design software that supports the construction of systems for the DNA toolbox. DACCAD is ultimately aimed to design actual in vitro implementations, which is made possible by building on the experimental knowledge available on the DNA toolbox. We illustrate its effectiveness by designing various systems, from Montagne et al.'s Oligator or Padirac et al.'s bistable system to new and complex networks, including a two-bit counter or a frequency divider as well as an example of very large system encoding the game Mastermind. In the process, we highlight a variety of behaviours, such as enzymatic saturation and load effect, which would be hard to handle or even predict with a simpler model. We also show that those mechanisms, while generally seen as detrimental, can be used in a positive way, as functional part of a design. Additionally, the number of parameters included in these simulations can be large, especially in the case of complex systems. For this reason, we included the

  20. Computer-assisted design for scaling up systems based on DNA reaction networks.

    Science.gov (United States)

    Aubert, Nathanaël; Mosca, Clément; Fujii, Teruo; Hagiya, Masami; Rondelez, Yannick

    2014-04-06

    In the past few years, there have been many exciting advances in the field of molecular programming, reaching a point where implementation of non-trivial systems, such as neural networks or switchable bistable networks, is a reality. Such systems require nonlinearity, be it through signal amplification, digitalization or the generation of autonomous dynamics such as oscillations. The biochemistry of DNA systems provides such mechanisms, but assembling them in a constructive manner is still a difficult and sometimes counterintuitive process. Moreover, realistic prediction of the actual evolution of concentrations over time requires a number of side reactions, such as leaks, cross-talks or competitive interactions, to be taken into account. In this case, the design of a system targeting a given function takes much trial and error before the correct architecture can be found. To speed up this process, we have created DNA Artificial Circuits Computer-Assisted Design (DACCAD), a computer-assisted design software that supports the construction of systems for the DNA toolbox. DACCAD is ultimately aimed to design actual in vitro implementations, which is made possible by building on the experimental knowledge available on the DNA toolbox. We illustrate its effectiveness by designing various systems, from Montagne et al.'s Oligator or Padirac et al.'s bistable system to new and complex networks, including a two-bit counter or a frequency divider as well as an example of very large system encoding the game Mastermind. In the process, we highlight a variety of behaviours, such as enzymatic saturation and load effect, which would be hard to handle or even predict with a simpler model. We also show that those mechanisms, while generally seen as detrimental, can be used in a positive way, as functional part of a design. Additionally, the number of parameters included in these simulations can be large, especially in the case of complex systems. For this reason, we included the

  1. Comparison of computer based instruction to behavior skills training for teaching staff implementation of discrete-trial instruction with an adult with autism.

    Science.gov (United States)

    Nosik, Melissa R; Williams, W Larry; Garrido, Natalia; Lee, Sarah

    2013-01-01

    In the current study, behavior skills training (BST) is compared to a computer based training package for teaching discrete trial instruction to staff, teaching an adult with autism. The computer based training package consisted of instructions, video modeling and feedback. BST consisted of instructions, modeling, rehearsal and feedback. Following training, participants were evaluated in terms of their accuracy on completing critical skills for running a discrete trial program. Six participants completed training; three received behavior skills training and three received the computer based training. Participants in the BST group performed better overall after training and during six week probes than those in the computer based training group. There were differences across both groups between research assistant and natural environment competency levels.

  2. A comparative study between xerographic, computer-assisted overlay generation and animated-superimposition methods in bite mark analyses.

    Science.gov (United States)

    Tai, Meng Wei; Chong, Zhen Feng; Asif, Muhammad Khan; Rahmat, Rabiah A; Nambiar, Phrabhakaran

    2016-09-01

    This study was to compare the suitability and precision of xerographic and computer-assisted methods for bite mark investigations. Eleven subjects were asked to bite on their forearm and the bite marks were photographically recorded. Alginate impressions of the subjects' dentition were taken and their casts were made using dental stone. The overlays generated by xerographic method were obtained by photocopying the subjects' casts and the incisal edge outlines were then transferred on a transparent sheet. The bite mark images were imported into Adobe Photoshop® software and printed to life-size. The bite mark analyses using xerographically generated overlays were done by comparing an overlay to the corresponding printed bite mark images manually. In computer-assisted method, the subjects' casts were scanned into Adobe Photoshop®. The bite mark analyses using computer-assisted overlay generation were done by matching an overlay and the corresponding bite mark images digitally using Adobe Photoshop®. Another comparison method was superimposing the cast images with corresponding bite mark images employing the Adobe Photoshop® CS6 and GIF-Animator©. A score with a range of 0-3 was given during analysis to each precision-determining criterion and the score was increased with better matching. The Kruskal Wallis H test showed significant difference between the three sets of data (H=18.761, p<0.05). In conclusion, bite mark analysis using the computer-assisted animated-superimposition method was the most accurate, followed by the computer-assisted overlay generation and lastly the xerographic method. The superior precision contributed by digital method is discernible despite the human skin being a poor recording medium of bite marks.

  3. The Impact of Computers on Student Performance and Teacher Behavior.

    Science.gov (United States)

    Pisapia, John R.; Knutson, Kim; Coukos, Eleni D.

    This paper reports on a 3-year computer initiative implemented by a school district in a metropolitan area. The initiative began in 1996 and continued through 1998. The school district of 44,000 students funded 5 computers and an ink jet color printer in each elementary classroom in 34 schools. The purpose of this study was to determine the impact…

  4. Evolutionary Computational Methods for Identifying Emergent Behavior in Autonomous Systems

    Science.gov (United States)

    Terrile, Richard J.; Guillaume, Alexandre

    2011-01-01

    A technique based on Evolutionary Computational Methods (ECMs) was developed that allows for the automated optimization of complex computationally modeled systems, such as autonomous systems. The primary technology, which enables the ECM to find optimal solutions in complex search spaces, derives from evolutionary algorithms such as the genetic algorithm and differential evolution. These methods are based on biological processes, particularly genetics, and define an iterative process that evolves parameter sets into an optimum. Evolutionary computation is a method that operates on a population of existing computational-based engineering models (or simulators) and competes them using biologically inspired genetic operators on large parallel cluster computers. The result is the ability to automatically find design optimizations and trades, and thereby greatly amplify the role of the system engineer.

  5. Functions of a Computer Assisted Teaching Systems, SOLAR-CATS, which uses P2P technology

    OpenAIRE

    山之上, 卓; ヤマノウエ, タカシ; Yamanoue, Takashi

    2005-01-01

    P2P技術を利用した教育支援システムSOLAR-CATSの機能について述べる。SOLAR-CATSを利用することにより、端末教室において、教師が行うSOLAR-CATSの応用プログラムの操作を、全学生端末上で、実時間で同時に見せたり、学生間で共同作業を行ったり、教師や学生が行う操作の記録と再生を行ったりすることができる。ファイヤーウォールで隔てられた遠隔地にある教室のネットワーク間を結んで利用することも可能である。SOLAR- CATSは、お絵かきプログラム、テキストエディタ、簡単なプログラミング環境、Webブラウザ、英作文支援システムなどの応用プログラムを備えている。 A computer assisted teaching system, SOLAR-CATS, which uses P2P technology, is shown. In a computer laboratory, the teacher can show operation of application programs of the SOLAR-CATS at his/her terminal ...

  6. A comparative study of 2 computer-assisted methods of quantifying brightfield microscopy images.

    Science.gov (United States)

    Tse, George H; Marson, Lorna P

    2013-10-01

    Immunohistochemistry continues to be a powerful tool for the detection of antigens. There are several commercially available software packages that allow image analysis; however, these can be complex, require relatively high level of computer skills, and can be expensive. We compared 2 commonly available software packages, Adobe Photoshop CS6 and ImageJ, in their ability to quantify percentage positive area after picrosirius red (PSR) staining and 3,3'-diaminobenzidine (DAB) staining. On analysis of DAB-stained B cells in the mouse spleen, with a biotinylated primary rat anti-mouse-B220 antibody, there was no significant difference on converting images from brightfield microscopy to binary images to measure black and white pixels using ImageJ compared with measuring a range of brown pixels with Photoshop (Student t test, P=0.243, correlation r=0.985). When analyzing mouse kidney allografts stained with PSR, Photoshop achieved a greater interquartile range while maintaining a lower 10th percentile value compared with analysis with ImageJ. A lower 10% percentile reflects that Photoshop analysis is better at analyzing tissues with low levels of positive pixels; particularly relevant for control tissues or negative controls, whereas after ImageJ analysis the same images would result in spuriously high levels of positivity. Furthermore comparing the 2 methods by Bland-Altman plot revealed that these 2 methodologies did not agree when measuring images with a higher percentage of positive staining and correlation was poor (r=0.804). We conclude that for computer-assisted analysis of images of DAB-stained tissue there is no difference between using Photoshop or ImageJ. However, for analysis of color images where differentiation into a binary pattern is not easy, such as with PSR, Photoshop is superior at identifying higher levels of positivity while maintaining differentiation of low levels of positive staining.

  7. Effects of Computer-Assisted STAD, LTM and ICI Cooperative Learning Strategies on Nigerian Secondary School Students' Achievement, Gender and Motivation in Physics

    Science.gov (United States)

    Gambari, Amosa Isiaka; Yusuf, Mudasiru Olalere; Thomas, David Akpa

    2015-01-01

    This study examined the effectiveness of computer-assisted instruction on Student Team Achievement Division (STAD) and Learning Together (LT) cooperative learning strategies on Nigerian secondary students' achievement and motivation in physics. The effectiveness of computer assisted instructional package (CAI) for teaching physics concepts in…

  8. Usefulness of hemocytometer as a counting chamber in a computer assisted sperm analyzer (CASA)

    Science.gov (United States)

    Eljarah, A.; Chandler, J.; Jenkins, J.A.; Chenevert, J.; Alcanal, A.

    2013-01-01

    Several methods are used to determine sperm cell concentration, such as the haemocytometer, spectrophotometer, electronic cell counter and computer-assisted semen analysers (CASA). The utility of CASA systems has been limited due to the lack of characterization of individual systems and the absence of standardization among laboratories. The aims of this study were to: 1) validate and establish setup conditions for the CASA system utilizing the haemocytometer as a counting chamber, and 2) compare the different methods used for the determination of sperm cell concentration in bull semen. Two ejaculates were collected and the sperm cell concentration was determined using spectrophotometer and haemocytometer. For the Hamilton-Thorn method, the haemocytometer was used as a counting chamber. Sperm concentration was determined three times per ejaculate samples. A difference (P 0.05) or between the haemocytometer count and the spectrophotometer. Based on the results of this study, we concluded that the haemocytometer can be used in computerized semen analysis systems as a substitute for the commercially available disposable counting chambers, therefore avoiding disadvantageous high costs and slower procedures.

  9. Comparison of computer-assisted planning and manual planning for depth electrode implantations in epilepsy.

    Science.gov (United States)

    Nowell, Mark; Sparks, Rachel; Zombori, Gergely; Miserocchi, Anna; Rodionov, Roman; Diehl, Beate; Wehner, Tim; Baio, Gianluca; Trevisi, Gianluca; Tisdall, Martin; Ourselin, Sebastien; McEvoy, Andrew W; Duncan, John

    2016-06-01

    OBJECT The objective of this study was to evaluate the clinical utility of multitrajectory computer-assisted planning software (CAP) to plan stereoelectroencephalography (SEEG) electrode arrangements. METHODS A cohort of 18 patients underwent SEEG for evaluation of epilepsy at a single center between August 2013 and August 2014. Planning of electrodes was performed manually and stored using EpiNav software. CAP was developed as a planning tool in EpiNav. The user preselects a set of cerebral targets and optimized trajectory constraints, and then runs an automated search of potential scalp entry points and associated trajectories. Each trajectory is associated with metrics for a safety profile, derived from the minimal distance to vascular structures, and an efficacy profile, derived from the proportion of depth electrodes that are within or adjacent to gray matter. CAP was applied to the cerebral targets used in the cohort of 18 previous manually planned implantations to generate new multitrajectory implantation plans. A comparison was then undertaken for trajectory safety and efficacy. RESULTS CAP was applied to 166 electrode targets in 18 patients. There were significant improvements in both the safety profile and efficacy profile of trajectories generated by CAP compared with manual planning (p plan SEEG implantations. CAP provides feasible depth electrode arrangements, with quantitatively greater safety and efficacy profiles, and with a substantial reduction in duration of planning within the 3D multimodality framework.

  10. Calibrated peer review for computer-assisted learning of biological research competencies.

    Science.gov (United States)

    Clase, Kari L; Gundlach, Ellen; Pelaez, Nancy J

    2010-09-01

    Recently, both science and technology faculty have been recognizing biological research competencies that are valued but rarely assessed. Some of these valued learning outcomes include scientific methods and thinking, critical assessment of primary papers, quantitative reasoning, communication, and putting biological research into a historical and broader social context. This article presents examples of Calibrated Peer Review (CPR) assignments that illustrate a computer-assisted method to help students achieve biological research competencies. A new release of CPR is appropriate for engaging students online in reading and writing about investigations. A participant perception inventory was designed for use as a repeated measure to discriminate among beginning, middle, and ending student perceptions. Examples are provided to demonstrate how to assess student perceptions of what they gain from instruction related to science research competencies. Results suggest that students in a large enrollment class consider CPR to be useful for helping them learn about quantitative and categorical research variables; the use of the experimental method to test ideas; the use of controls; analysis, interpretation, and presentation of data; and how to critically read primary papers.

  11. Revisiting cognitive and learning styles in computer-assisted instruction: not so useful after all.

    Science.gov (United States)

    Cook, David A

    2012-06-01

    In a previous systematic review, the author proposed that adaptation to learners' cognitive and learning styles (CLSs) could improve the efficiency of computer-assisted instruction (CAI). In the present article, he questions that proposition, arguing that CLSs do not make a substantive difference in CAI. To support this argument, the author performed an updated systematic literature search, pooled new findings with those from the previous review, and reinterpreted this evidence with a focus on aptitude-treatment interactions. (An aptitude-treatment interaction occurs when a student with attribute 1 learns better with instructional approach A than with approach B, whereas a student with attribute 2 learns better with instructional approach B).Of 65 analyses reported in 48 studies, only 9 analyses (14%) showed significant interactions between CLS and instructional approach. It seems that aptitude-treatment interactions with CLSs are at best infrequent and small in magnitude. There are several possible explanations for this lack of effect. First, the influence of strong instructional methods likely dominates the impact of CLSs. Second, current methods for assessing CLSs lack validity evidence and are inadequate to accurately characterize the individual learner. Third, theories are vague, and empiric evidence is virtually nonexistent to guide the planning of style-targeted instructional designs. Adaptation to learners' CLSs thus seems unlikely to enhance CAI. The author recommends that educators focus on employing strong instructional methods. Educators might also consider assessing and adapting to learners' prior knowledge or allowing learners to select among alternate instructional approaches.

  12. Functional priorities, assistive technology, and brain-computer interfaces after spinal cord injury

    Directory of Open Access Journals (Sweden)

    Jennifer L. Collinger, PhD

    2013-04-01

    Full Text Available Spinal cord injury (SCI often affects a person’s ability to perform critical activities of daily living and can negatively affect his or her quality of life. Assistive technology aims to bridge this gap in order to augment function and increase independence. It is critical to involve consumers in the design and evaluation process as new technologies such as brain-­computer interfaces (BCIs are developed. In a survey study of 57 veterans with SCI participating in the 2010 National Veterans Wheelchair Games, we found that restoration of bladder and bowel control, walking, and arm and hand function (tetraplegia only were all high priorities for improving quality of life. Many of the participants had not used or heard of some currently available technologies designed to improve function or the ability to interact with their environment. The majority of participants in this study were interested in using a BCI, particularly for controlling functional electrical stimulation to restore lost function. Independent operation was considered to be the most important design criteria. Interestingly, many participants reported that they would consider surgery to implant a BCI even though noninvasiveness was a high-priority design requirement. This survey demonstrates the interest of individuals with SCI in receiving and contributing to the design of BCIs.

  13. Commercialization of computer assisted detection: the path from science to product.

    Science.gov (United States)

    Menhardt, Wido

    2004-01-01

    Computer Assisted Detection (CAD) is a rapidly growing field with applications in a growing number of diseases, modalities, and anatomies. Academic and industrial research groups worldwide are proposing and publishing new approaches, techniques, and paradigms at an ever-increasing rate: The results are encouraging and imply the potential for dramatic improvements in disease detection and tracking. To researchers, it often seems curious that commercialization of these advances lags far behind academic progress, but there are many obstacles to be overcome, from IP management to QSR (Quality Systems Regulations) compliance, from image data and truth collection to GCP (Good Clinical Practices), from bio-statistics to proof of Safety & Effectiveness with regulatory agencies. This two-hour session is designed to shed light on experiences in CAD commercialization of innovative CAD technologies into the marketplace. The goal is to share best practices, non-competitive ideas, and "mistakes not to be repeated" among the seminar participants and with researchers in industry and academia. All speakers are involved in bringing a variety of CAD applications to market. Panelists are: Susan Wood--R2 Peter Whitehead--Quantitative Imaging Michael Yeh--Deus Chris Wood--Confirma Fred Lachmann--Medipattern Alok Gupta--Siemens Patrick Hess--Imatx Wido Menhardt--Eastman Kodak.

  14. Computer-assisted diagnostic tool to quantify the pulmonary veins in sickle cell associated pulmonary hypertension

    Science.gov (United States)

    Jajamovich, Guido H.; Pamulapati, Vivek; Alam, Shoaib; Mehari, Alem; Kato, Gregory J.; Wood, Bradford J.; Linguraru, Marius George

    2012-03-01

    Pulmonary hypertension is a common cause of death among patients with sickle cell disease. This study investigates the use of pulmonary vein analysis to assist the diagnosis of pulmonary hypertension non-invasively with CT-Angiography images. The characterization of the pulmonary veins from CT presents two main challenges. Firstly, the number of pulmonary veins is unknown a priori and secondly, the contrast material is degraded when reaching the pulmonary veins, making the edges of these vessels to appear faint. Each image is first denoised and a fast marching approach is used to segment the left atrium and pulmonary veins. Afterward, a geodesic active contour is employed to isolate the left atrium. A thinning technique is then used to extract the skeleton of the atrium and the veins. The locations of the pulmonary veins ostia are determined by the intersection of the skeleton and the contour of the atrium. The diameters of the pulmonary veins are measured in each vein at fixed distances from the corresponding ostium, and for each distance, the sum of the diameters of all the veins is computed. These indicators are shown to be significantly larger in sickle-cell patients with pulmonary hypertension as compared to controls (p-values < 0.01).

  15. Does Computer-Assisted Femur First THR Improve Musculoskeletal Loading Conditions?

    Directory of Open Access Journals (Sweden)

    Tim A. Weber

    2015-01-01

    Full Text Available We have developed a novel, computer-assisted operation method for minimal-invasive total hip replacement (THR following the concept of “femur first/combined anteversion,” which incorporates various aspects of performing a functional optimization of the prosthetic stem and cup position (CAS FF. The purpose of this study is to assess whether the hip joint reaction forces and patient’s gait parameters are being improved by CAS FF in relation to conventional THR (CON. We enrolled 60 patients (28 CAS FF/32 CON and invited them for gait analysis at three time points (preoperatively, postop six months, and postop 12 months. Data retrieved from gait analysis was processed using patient-specific musculoskeletal models. The target parameters were hip reaction force magnitude (hrf, symmetries, and orientation with respect to the cup. Hrf in the CAS FF group were closer to a young healthy normal. Phase-shift symmetry showed an increase in the CAS FF group. Hrf orientation in the CAS FF group was closer to optimum, though no edge or rim-loading occurred in the CON group as well. The CAS FF group showed an improved hrf orientation in an early stage and a trend to an improved long-term outcome.

  16. Computer-assisted multi-segment gradient optimization in ion chromatography.

    Science.gov (United States)

    Tyteca, Eva; Park, Soo Hyun; Shellie, Robert A; Haddad, Paul R; Desmet, Gert

    2015-02-13

    This study reports simulation and optimization of ion chromatography separations using multi-segment gradient elution. First, an analytical expression for the gradient retention factor under these complex elution profiles was derived. This allows a rapid retention time prediction calculations under different gradient conditions, during computer-assisted method development. Next, these analytical expressions were implemented in an in-house written Matlab(®) routine that searches for the optimal (multi-segment) gradient conditions, either via a four-segment grid search or via the recently proposed one-segment-per-component search, in which the slope is adjusted after the elution of each individual component. Evaluation of the retention time simulation and optimization approaches was performed on a mixture of 18 inorganic anions and different subsets with varying number of compounds. The two considered multi-segment gradient optimization searches resulted in similar proposed gradient profiles, and corresponding chromatograms. Moreover, the resultant chromatograms were clearly superior to the chromatograms obtained from the best simple linear gradient profiles, found via a fine grid search. The proposed approach is useful for automated method development in ion chromatography in which complex elution profiles are often used to increase the separation power.

  17. Computer Assisted Objective Structured Clinical Examination: A useful tool for dermatology undergraduate assessment

    Directory of Open Access Journals (Sweden)

    Chander Grover

    2012-01-01

    Full Text Available Background: Dermatology is a minor subject in undergraduate medical curriculum in India. The dermatology clinical postings are generally poorly attended, and the clinical acumen of an average medical graduate in this specialty is quite low. Aims: To develop and implement Computer Assisted Objective Structured Clinical Examination (CA-OSCE as a means of end of dermatology posting evaluation. Also, to assess its effectiveness in improving the motivation, attendance and learning of undergraduate students with respect to their visual recognition skills and problem solving ability. Methods: We designed and introduced CA-OSCE as a means of end of posting assessment. The average attendance and assessment scores of students undergoing CA-OSCE were compiled and compared using ′independent t test′ with the scores of previous year′s students who had undergone assessment with essay type questions. Results: The average attendance and average assessment scores for the candidates undergoing CA-OSCE were found to 83.36% and 77.47%, respectively as compared to 64.09% and 52.07%, respectively for previous years′ students. The difference between the two groups was found to be statistically significant. Student acceptability of the technique was also high, and their subjective feedback was encouraging. Conclusion: CA-OSCE is a useful tool for assessment of dermatology undergraduates. It has the potential to drive them to attend regularly as well as to test their higher cognitive skills of analysis and problem solving.

  18. Effect of Integrating Computer-Assisted Language Learning in the TOEFL Performance of Nursing Students

    Directory of Open Access Journals (Sweden)

    Marlene R. Castillo

    2015-08-01

    Full Text Available The study aimed to determine the relationship between the use of a computer-assisted language learning (CALL software and the TOEFL performance of nursing students. This descriptive study used a pre-test and post-test and a survey questionnaire to gather data. Interviews and observations were also conducted to gain further insights in the use of the software. Results indicate that for the three areas of the TOEFL model practice test, there is a statistically significant increase in the gain scores of the students in the post-test after being exposed to the use of the software for two semesters. They performed well in Sentence Completion and Error Identification, both under Structure and Written Expression. On the other hand, they performed only fairly for Reading Comprehension and Vocabulary. For Structure and Written Expression, the areas of strength included correct choice of main verbs, subject pronouns, and comparative use of adjective while the areas of weaknesses include correlative conjunctions, adverb-related structures, and indefinite subject and verb agreement.

  19. A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in technological rf plasmas

    Science.gov (United States)

    Berger, Birk; Schulze, Julian; Daksha, Manaswi; Schuengel, Edmund; Koepke, Mark; Korolov, Ihor; Derzsi, Aranka; Donko, Zoltan

    2016-09-01

    A Computationally Assisted Spectroscopic Technique to measure secondary electron emission coefficients (y-CAST) in capacitive rf plasmas is proposed. This non-intrusive, sensitive diagnostic is based on a combination of Phase Resolved Optical Emission Spectroscopy and PIC simulations. Under most conditions in electropositive plasmas the spatio-temporally resolved electron-impact excitation rate features two distinct maxima adjacent to each electrode at different times within one rf period. One maximum is the consequence of an energy gain of the electrons due to sheath expansion. The second maximum is produced by electrons accelerated towards the plasma bulk by the sheath electric field at the time of maximum voltage drop across the sheath. Due to the different excitation mechanisms the ratio of the intensities of these maxima is very sensitive to y, which allows for its determination via comparing the experimentally measured excitation profiles with corresponding simulation data obtained with various y-coefficients. This diagnostic is tested here in a geometrically symmetric reactor, for stainless steel electrodes and argon gas. An effective secondary electron emission coefficient of y = 0.067+-0.010 is obtained, which is in excellent agreement with previous experimental results.

  20. A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in radio frequency plasmas

    Science.gov (United States)

    Daksha, M.; Berger, B.; Schuengel, E.; Korolov, I.; Derzsi, A.; Koepke, M.; Donkó, Z.; Schulze, J.

    2016-06-01

    A computationally assisted spectroscopic technique to measure secondary electron emission coefficients (γ-CAST) in capacitively-coupled radio-frequency plasmas is proposed. This non-intrusive, sensitive diagnostic is based on a combination of phase resolved optical emission spectroscopy and particle-based kinetic simulations. In such plasmas (under most conditions in electropositive gases) the spatio-temporally resolved electron-impact excitation/ionization rate features two distinct maxima adjacent to each electrode at different times within each RF period. While one maximum is the consequence of the energy gain of electrons due to sheath expansion, the second maximum is produced by secondary electrons accelerated towards the plasma bulk by the sheath electric field at the time of maximum voltage drop across the adjacent sheath. Due to these different excitation/ionization mechanisms, the ratio of the intensities of these maxima is very sensitive to the secondary electron emission coefficient γ. This sensitvity, in turn, allows γ to be determined by comparing experimental excitation profiles and simulation data obtained with various γ-coefficients. The diagnostic, tested here in a geometrically symmetric argon discharge, yields an effective secondary electron emission coefficient of γ =0.066+/- 0.01 for stainless steel electrodes.

  1. Dental anatomy carving computer-assisted instruction program: an assessment of student performance and perceptions.

    Science.gov (United States)

    Nance, Elizabeth T; Lanning, Sharon K; Gunsolley, John C

    2009-08-01

    The purpose of this study was to compare the performance of students exposed to two different instructional modalities for dental anatomy wax carving: CAI (computer-assisted instruction) using DVD technology, or traditional laboratory instruction. Students' self-assessment scores were also compared to faculty scores, and students' perceptions of their teaching modality were analyzed. Seventy-three first-year dental students (response rate 81 percent) participated in this randomized single blind trial, in which faculty graders were blinded to student group assignment. There were no statistical differences, as determined by the Wilcoxon non-parametric test and a t-test, between the faculty grades on the wax carving from the two teaching methods the students experienced. The student self-assessments revealed higher mean grades (3.0 for the DVD-only group and 3.1 for the traditional group) than the faculty actual mean grades (2.2 for both the DVD-only group and the traditional group) by almost one grade level on a 4.0 grade scale. Similar percentages of students in the traditional group had either favorable or unfavorable perceptions of their learning experience, while more students in the DVD-only group reported favorable perceptions. Students from both groups said they wanted more faculty feedback in the course. Based on these objective and subjective data, merging CAI and traditional laboratory teaching may best enhance student learning needs.

  2. The Role of Computed Tomography in Predicting Left Ventricular Assist Device Infectious Complications

    Directory of Open Access Journals (Sweden)

    Carrie K Gomez

    2016-01-01

    Full Text Available Objective: The purpose of this study is to identify early computed tomography findings around the driveline which would predict mediastinal or left ventricular assist device (LVAD pocket abscess formation. Materials and Methods: A retrospective analysis was performed on 128 LVAD recipients between January 2007 and December 2011. Infectious complications were subdivided into those affecting the driveline and those resulting in abscess formation either around the LVAD pump or mediastinum. The size and location of infiltrative changes surrounding the driveline were used to predict infection propagation resulting in abscess. Results: Of the 128 patients, 49 (38.3% patients developed driveline infections and 24 (18.8% patients developed abscess. 87.5% patients who developed abscess had a preceding driveline infection. The mean time from driveline infection to the development of pump pocket abscess was approximately 7 months. In addition, patients with abscess in the pump pocket or mediastinum had preceding infiltrative changes surrounding the driveline ≥14 mm (P = 0.0001. A preperitoneal location and size of infiltrative changes ≥14 mm were correlated with a higher likelihood of abscess formation (P = 0.0002. Conclusion: Our study demonstrates the predictive value of infection/infiltrative changes around the driveline, which increases the risk for abscess formation in the LVAD pump pocket and/or in the mediastinum.

  3. Computer-assisted photo identification outperforms visible implant elastomers in an endangered salamander, Eurycea tonkawae.

    Directory of Open Access Journals (Sweden)

    Nathan F Bendik

    Full Text Available Despite recognition that nearly one-third of the 6300 amphibian species are threatened with extinction, our understanding of the general ecology and population status of many amphibians is relatively poor. A widely-used method for monitoring amphibians involves injecting captured individuals with unique combinations of colored visible implant elastomer (VIE. We compared VIE identification to a less-invasive method - computer-assisted photographic identification (photoID - in endangered Jollyville Plateau salamanders (Eurycea tonkawae, a species with a known range limited to eight stream drainages in central Texas. We based photoID on the unique pigmentation patterns on the dorsal head region of 1215 individual salamanders using identification software Wild-ID. We compared the performance of photoID methods to VIEs using both 'high-quality' and 'low-quality' images, which were taken using two different camera types and technologies. For high-quality images, the photoID method had a false rejection rate of 0.76% compared to 1.90% for VIEs. Using a comparable dataset of lower-quality images, the false rejection rate was much higher (15.9%. Photo matching scores were negatively correlated with time between captures, suggesting that evolving natural marks could increase misidentification rates in longer term capture-recapture studies. Our study demonstrates the utility of large-scale capture-recapture using photo identification methods for Eurycea and other species with stable natural marks that can be reliably photographed.

  4. Computer assisted semen analysis for quantification of motion characteristics of bull sperm during cryopreservation cycle

    Directory of Open Access Journals (Sweden)

    M. N. Sundararaman

    Full Text Available Aim: The study was undertaken to quantify and to analyze the changes in the motion characteristics of bull spermatozoa during various stages of cryopreservation cycle. Materials and Methods: Using computer assisted semen analysis (CASA technique, 26 ejaculates, collected from two Jersey bulls were analyzed for motility, head behaviour and swimming pattern of spermatozoa on dilution, pre-freeze and post-thaw stages of cryopreservation. French straw technique was employed for deep-freezing of semen using liquid nitrogen. Results: Equilibration of diluted semen at 5 C has significantly (P< 0.01 reduced sperm motility, progressive motility, path velocity, and progressive velocity. Beat cross frequency was also affected significantly (P<0.05 by equilibration. Freezing and thawing processes drastically affected all the motility, velocity and head behaviour characteristics (P< 0.01. Conclusion: CASA facilitate objective evaluation sperm motion characteristics. Adoption of CASA technique has the potential for improvements in evaluation of semen thereby the quality of frozen semen for fertility can be enhanced. [Vet World 2012; 5(12.000: 723-726

  5. A wireless body area network of intelligent motion sensors for computer assisted physical rehabilitation.

    Science.gov (United States)

    Jovanov, Emil; Milenkovic, Aleksandar; Otto, Chris; de Groen, Piet C

    2005-03-01

    BACKGROUND: Recent technological advances in integrated circuits, wireless communications, and physiological sensing allow miniature, lightweight, ultra-low power, intelligent monitoring devices. A number of these devices can be integrated into a Wireless Body Area Network (WBAN), a new enabling technology for health monitoring. METHODS: Using off-the-shelf wireless sensors we designed a prototype WBAN which features a standard ZigBee compliant radio and a common set of physiological, kinetic, and environmental sensors. RESULTS: We introduce a multi-tier telemedicine system and describe how we optimized our prototype WBAN implementation for computer-assisted physical rehabilitation applications and ambulatory monitoring. The system performs real-time analysis of sensors' data, provides guidance and feedback to the user, and can generate warnings based on the user's state, level of activity, and environmental conditions. In addition, all recorded information can be transferred to medical servers via the Internet and seamlessly integrated into the user's electronic medical record and research databases. CONCLUSION: WBANs promise inexpensive, unobtrusive, and unsupervised ambulatory monitoring during normal daily activities for prolonged periods of time. To make this technology ubiquitous and affordable, a number of challenging issues should be resolved, such as system design, configuration and customization, seamless integration, standardization, further utilization of common off-the-shelf components, security and privacy, and social issues.

  6. A wireless body area network of intelligent motion sensors for computer assisted physical rehabilitation

    Directory of Open Access Journals (Sweden)

    Otto Chris

    2005-03-01

    Full Text Available Abstract Background Recent technological advances in integrated circuits, wireless communications, and physiological sensing allow miniature, lightweight, ultra-low power, intelligent monitoring devices. A number of these devices can be integrated into a Wireless Body Area Network (WBAN, a new enabling technology for health monitoring. Methods Using off-the-shelf wireless sensors we designed a prototype WBAN which features a standard ZigBee compliant radio and a common set of physiological, kinetic, and environmental sensors. Results We introduce a multi-tier telemedicine system and describe how we optimized our prototype WBAN implementation for computer-assisted physical rehabilitation applications and ambulatory monitoring. The system performs real-time analysis of sensors' data, provides guidance and feedback to the user, and can generate warnings based on the user's state, level of activity, and environmental conditions. In addition, all recorded information can be transferred to medical servers via the Internet and seamlessly integrated into the user's electronic medical record and research databases. Conclusion WBANs promise inexpensive, unobtrusive, and unsupervised ambulatory monitoring during normal daily activities for prolonged periods of time. To make this technology ubiquitous and affordable, a number of challenging issues should be resolved, such as system design, configuration and customization, seamless integration, standardization, further utilization of common off-the-shelf components, security and privacy, and social issues.

  7. Computer assistance in femoral derotation osteotomy: a bottom-up approach

    Directory of Open Access Journals (Sweden)

    Auer Christoph

    2016-09-01

    Full Text Available Severe gait abnormalities in patients with cerebral palsy are often treated by correction osteotomy. The established procedure of femoral derotation osteotomy (FDO has proven effective to realign femur anteversion. Nevertheless, studies have revealed that therapy outcome is subject to substantial inter-patient variability and systematic loss of correction. Our previous work suggests that practical limitations in FDO may significantly contribute to this effect. In this work, we propose a novel computer assisted measurement system to support FDO with objective measurement (desired accuracy: ∼ ± 3° and continuous monitoring of derotation. A prototype system based on the clinically emerging electromagnetic tracking technology is demonstrated which incorporates technical and operational considerations to enable continuous measurement in OR conditions while preserving the conventional workflow without disruptions. In phantom studies, the achieved measurement accuracy (standard error ≅±1.6∘$\\cong\\pm 1.6{}^{\\circ}$ proved high potential and may hugely benefit the quality of surgical execution. Currently, the prototype system is assessed under OR conditions in an in-vivo study with CP patients. Early experience shows high appreciation among surgeons and good potential for future application.

  8. Computer-assisted learning in anatomy at the international medical school in Debrecen, Hungary: a preliminary report.

    Science.gov (United States)

    Kish, Gary; Cook, Samuel A; Kis, Gréta

    2013-01-01

    The University of Debrecen's Faculty of Medicine has an international, multilingual student population with anatomy courses taught in English to all but Hungarian students. An elective computer-assisted gross anatomy course, the Computer Human Anatomy (CHA), has been taught in English at the Anatomy Department since 2008. This course focuses on an introduction to anatomical digital images along with clinical cases. This low-budget course has a large visual component using images from magnetic resonance imaging and computer axial tomogram scans, ultrasound clinical studies, and readily available anatomy software that presents topics which run in parallel to the university's core anatomy curriculum. From the combined computer images and CHA lecture information, students are asked to solve computer-based clinical anatomy problems in the CHA computer laboratory. A statistical comparison was undertaken of core anatomy oral examination performances of English program first-year medical students who took the elective CHA course and those who did not in the three academic years 2007-2008, 2008-2009, and 2009-2010. The results of this study indicate that the CHA-enrolled students improved their performance on required anatomy core curriculum oral examinations (P students benefit from computer-assisted learning in a multilingual and diverse cultural environment.

  9. The effect of computer-assisted foreign language teaching on the student’s attitude and success

    Directory of Open Access Journals (Sweden)

    Orhan Kocaman

    2016-12-01

    Full Text Available This research was carried out to determine the impact of computer-assisted teaching on teaching English. The first phase of the research was designed as an experiment and computer-assisted teaching and traditional teaching methods were conducted synchronically in two different groups. In the second phase, effects of variables such as gender, age, receiving private lesson and types of high schools of the students who attended the implementation were analysed. The sample of the research consisted of 40 first year undergraduate students from the first bachelor’s level program and another 40 from the second bachelor’s level program   in the Department of Computer Education and Instructional Technology in the Faculty of Education at Sakarya University in 2003-2004 academic year fall semester.  The students of the first bachelor’s level program were assigned to be the control group and the students of the second bachelor’s level program were assigned to be the experimental group. The experimental group was given the computer-assisted lessons for twelve weeks but traditional teaching methods were meanwhile used in the classes of the control group. The experimental group used a compact disc in the laboratory as an educational material, which was prepared by the researcher. Data for attitude evaluation were gathered by questionnaires and success was evaluated through students’ examination grades. In determining the success rate, pre-test and post-test grades were used as the data. At the end of the research, the results revealed that traditional teaching methods caused the students grouped according to the variables such as gender, age, private lessons and types of high schools to develop a negative attitude towards English lessons whereas computer-assisted teaching method led the students to develop a positive attitude. Although it was observed that traditional teaching methods made a positive impact on the success of the students in

  10. Computer-assisted visual interactive recognition and its prospects of implementation over the Internet

    Science.gov (United States)

    Zou, Jie; Gattani, Abhishek

    2005-01-01

    When completely automated systems don't yield acceptable accuracy, many practical pattern recognition systems involve the human either at the beginning (pre-processing) or towards the end (handling rejects). We believe that it may be more useful to involve the human throughout the recognition process rather than just at the beginning or end. We describe a methodology of interactive visual recognition for human-centered low-throughput applications, Computer Assisted Visual InterActive Recognition (CAVIAR), and discuss the prospects of implementing CAVIAR over the Internet. The novelty of CAVIAR is image-based interaction through a domain-specific parameterized geometrical model, which reduces the semantic gap between humans and computers. The user may interact with the computer anytime that she considers its response unsatisfactory. The interaction improves the accuracy of the classification features by improving the fit of the computer-proposed model. The computer makes subsequent use of the parameters of the improved model to refine not only its own statistical model-fitting process, but also its internal classifier. The CAVIAR methodology was applied to implement a flower recognition system. The principal conclusions from the evaluation of the system include: 1) the average recognition time of the CAVIAR system is significantly shorter than that of the unaided human; 2) its accuracy is significantly higher than that of the unaided machine; 3) it can be initialized with as few as one training sample per class and still achieve high accuracy; and 4) it demonstrates a self-learning ability. We have also implemented a Mobile CAVIAR system, where a pocket PC, as a client, connects to a server through wireless communication. The motivation behind a mobile platform for CAVIAR is to apply the methodology in a human-centered pervasive environment, where the user can seamlessly interact with the system for classifying field-data. Deploying CAVIAR to a networked mobile

  11. The Parents' Parenting Patterns, Education, Jobs, and Assistance to Their Children in Watching Television, and Children's Aggressive Behavior

    Science.gov (United States)

    Purwati; Japar, Muhammad

    2016-01-01

    The objective of this present is to test the effects of the parents' parenting patterns, education, jobs, and assistance to children in watching television on the children's aggressive behavior. This present research employed a quantitative approach with an ex-post factor design. The data were collected from 175 parents of which the children…

  12. What if it Suddenly Fails? Behavioral Aspects of Advanced Driver Assistant Systems on the Example of Local Danger Alerts

    NARCIS (Netherlands)

    Mahr, Angela; Cao, Yujia; Theune, Mariët; Dimitrova-Krause, Veronika; Schwartz, Tim; Müller, Christian; Coelho, Helder; Studer, Rudi; Wooldridge, Michael

    2010-01-01

    Many researchers argue, in assessing the benefits of Advanced Driver Assistance Systems (ADAS) it has to be taken into account that any gains in terms of security may be again reduced by the fact they affect the drivers’ behavior. In this paper, we present results of a driving simulation study in wh

  13. A Meta-Analytic Review of Social, Self-Concept, and Behavioral Outcomes of Peer-Assisted Learning

    Science.gov (United States)

    Ginsburg-Block, Marika D.; Rohrbeck, Cynthia A.; Fantuzzo, John W.

    2006-01-01

    Meta-analysis was used to examine social, self-concept, and behavioral effects of peer-assisted learning (PAL) interventions with elementary school students. An electronic search of PsycINFO and ERIC databases resulted in 36 relevant PAL studies. Overall, effect sizes were small to moderate across the 3 outcome variable domains. Both social and…

  14. Persuasive robotic assistant for health self-management of older adults : Design and evaluation of social behaviors

    NARCIS (Netherlands)

    Looije, Rosemarijn; Neerincx, Mark A.; Cnossen, Fokie

    2010-01-01

    Daily health self-management, such as the harmonization of food, exercise and medication, is a major problem for a large group of older adults with obesity or diabetics Computer-based personal assistance can help to behave healthy by persuading and guiding older adults For effective persuasion, the

  15. Persuasive robotic assistant for health self-management of older adults: Design and evaluation of social behaviors

    NARCIS (Netherlands)

    Looije, R.; Neerincx, M.A.; Cnossen, F.

    2010-01-01

    Daily health self-management, such as the harmonization of food, exercise and medication, is a major problem for a large group of older adults with obesity or diabetics. Computer-based personal assistance can help to behave healthy by persuading and guiding older adults. For effective persuasion, th

  16. Intentions of hospital nurses to work with computers: based on the theory of planned behavior.

    Science.gov (United States)

    Shoham, Snunith; Gonen, Ayala

    2008-01-01

    The purpose of this study was to determine registered nurses' attitudes related to intent to use computers in the hospital setting as a predictor of their future behavior. The study was further aimed at identifying the relationship between these attitudes and selected sociological, professional, and personal factors and to describe a research model integrating these various factors. The study was based on the theory of planned behavior. A random sample of 411 registered nurses was selected from a single large medical center in Israel. The study tool was a Likert-style questionnaire. Nine different indices were used: (1) behavioral intention toward computer use; (2) general attitudes toward computer use; (3) nursing attitudes toward computer use; (4) threat involved in computer use; (5) challenge involved in computer use; (6) organizational climate; (7) departmental climate; (8) attraction to technological innovations/innovativeness; (9) self-efficacy, ability to control behavior. Strong significant positive correlations were found between the nurses' attitudes (general attitudes and nursing attitudes), self-efficacy, innovativeness, and intentions to use computers. Higher correlations were found between departmental climate and attitudes than between organizational climate and attitudes. The threat and challenge that are involved in computer use were shown as important mediating variables to the understanding of the process of predicting attitudes and intentions toward using computers.

  17. Impeller behavior and displacement of the VentrAssist implantable rotary blood pump.

    Science.gov (United States)

    Chung, Michael K H; Zhang, Nong; Tansley, Geoff D; Woodard, John C

    2004-03-01

    The VentrAssist implantable rotary blood pump, intended for long-term ventricular assist, is under development and is currently being tested for its rotor-dynamic stability. The pump is of the centrifugal type and consists of a shaftless impeller, also acting as the rotor of the brushless DC motor. The impeller remains passively suspended in the pump cavity by hydrodynamic forces, resulting from the small clearances between the impeller outside surfaces and the pump cavity. In the older version of the pump tested, these small clearances range from approximately 50 microm to 230 microm; the displacement of the impeller relative to the pump cavity is unknown in use. This article presents two experiments: the first measured displacement of the impeller using eddy-current proximity sensors and laser proximity sensors. The second experiment used Hall-effect proximity sensors to measure the displacement of the impeller relative to the pump cavity. All transducers were calibrated prior to commencement of the experiments. Voltage output from the transducers was converted into impeller movement in five degrees of freedom (x, y, z, theta(x), and theta(y)). The sixth degree of freedom, the rotation about the impeller axis (theta(z)), was determined by the commutation performed by the motor controller. The impeller displacement was found to be within the acceptable range of 8 micro m to 222 microm, avoiding blood damage and contact between the impeller and cavity walls. Thus the impeller was hydrodynamically suspended within the pump cavity and results were typical of centrifugal pump behavior. This research will be the basis for further investigation into the stiffness and damping coefficient of the pump's hydrodynamic bearing.

  18. Predicting room acoustical behavior with the ODEON computer model

    DEFF Research Database (Denmark)

    Naylor, Graham; Rindel, Jens Holger

    1992-01-01

    for discrepancies are discussed. These discrepancies indicate areas in which the computational model has to be improved, and highlight some shortcomings of current room acoustical survey methods. The effects of various calculation parameters (e.g., number of rays, early reflection order) are also briefly considered.......The computational bases of the ODEON model for room acoustics are described in a companion paper. The model is implemented for general use of a PC. In this paper, various technical features of the program relevant to the acoustical design process are presented. These include interactive...

  19. Computer-assisted lip diagnosis on traditional Chinese medicine using multi-class support vector machines

    Directory of Open Access Journals (Sweden)

    Li FuFeng

    2012-08-01

    Full Text Available Abstract Background In Traditional Chinese Medicine (TCM, the lip diagnosis is an important diagnostic method which has a long history and is applied widely. The lip color of a person is considered as a symptom to reflect the physical conditions of organs in the body. However, the traditional diagnostic approach is mainly based on observation by doctor’s nude eyes, which is non-quantitative and subjective. The non-quantitative approach largely depends on the doctor’s experience and influences accurate the diagnosis and treatment in TCM. Developing new quantification methods to identify the exact syndrome based on the lip diagnosis of TCM becomes urgent and important. In this paper, we design a computer-assisted classification model to provide an automatic and quantitative approach for the diagnosis of TCM based on the lip images. Methods A computer-assisted classification method is designed and applied for syndrome diagnosis based on the lip images. Our purpose is to classify the lip images into four groups: deep-red, red, purple and pale. The proposed scheme consists of four steps including the lip image preprocessing, image feature extraction, feature selection and classification. The extracted 84 features contain the lip color space component, texture and moment features. Feature subset selection is performed by using SVM-RFE (Support Vector Machine with recursive feature elimination, mRMR (minimum Redundancy Maximum Relevance and IG (information gain. Classification model is constructed based on the collected lip image features using multi-class SVM and Weighted multi-class SVM (WSVM. In addition, we compare SVM with k-nearest neighbor (kNN algorithm, Multiple Asymmetric Partial Least Squares Classifier (MAPLSC and Naïve Bayes for the diagnosis performance comparison. All displayed faces image have obtained consent from the participants. Results A total of 257 lip images are collected for the modeling of lip diagnosis in TCM. The

  20. ESTABLISHING A METHODOLOGY FOR BENCHMARKING SPEECH SYNTHESIS FOR COMPUTER-ASSISTED LANGUAGE LEARNING (CALL

    Directory of Open Access Journals (Sweden)

    Zöe Handley

    2005-09-01

    Full Text Available Despite the new possibilities that speech synthesis brings about, few Computer-Assisted Language Learning (CALL applications integrating speech synthesis have found their way onto the market. One potential reason is that the suitability and benefits of the use of speech synthesis in CALL have not been proven. One way to do this is through evaluation. Yet, very few formal evaluations of speech synthesis for CALL purposes have been conducted. One possible reason for the neglect of evaluation in this context is the fact that it is expensive in terms of time and resources. An important concern given that there are several levels of evaluation from which such applications would benefit. Benchmarking, the comparison of the score obtained by a system with that obtained by one which is known, to guarantee user satisfaction in a standard task or set of tasks, is introduced as a potential solution to this problem. In this article, we report on our progress towards the development of one of these benchmarks, namely a benchmark for determining the adequacy of speech synthesis systems for use in CALL. We do so by presenting the results of a case study which aimed to identify the criteria which determine the adequacy of the output of speech synthesis systems for use in its various roles in CALL with a view to the selection of benchmark tests which will address these criteria. These roles (reading machine, pronunciation model, and conversational partner are also discussed here. An agenda for further research and evaluation is proposed in the conclusion.