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Sample records for ac computer-assisted oral

  1. Effects of computer-assisted oral anticoagulant therapy

    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 the...

  2. Computer-assisted oral and maxillofacial surgery

    Background: Methods from the area of virtual reality are used in oral and maxillofacial surgery for the planning and three-dimensional individual simulation of surgeries. Simulation: In order to simulate complex surgeries with the aid of a computer, the diagnostic image data and especially various imaging modalities (CT, MRT, US) must be arranged in relation to each other, thus enabling rapid switching between the various modalities as well as the viewing of mixed images. Segmenting techniques for the reconstruction of three-dimensional representations of soft-tissue and osseous areas are required. We must develop ergonomic and intuitively useable interaction methods for the surgeon, thus allowing for precise and fast entry of the planned surgical intervention in the planning and simulation phase. Surgery: During the surgical phase, instrument navigation tools offer the surgeon interactive support through operation guidance and control of potential dangers. This feature is already available today. Future intraoperative assistance will take the form of such passive tools for the support of intraoperative orientation as well as so-called tracking systems (semi-active systems) which accompany and support the surgeons' work. The final form are robots which execute specific steps completely autonomously. Discussion: The techniques of virtual reality keep gaining in importance for medical applications. Many applications are still being developed or are still in the form of a prototype. However, it is already clear that developments in this area will have a considerable effect on the surgeon's routine work. (orig.)

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

    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.

  4. Research and Practice of the System of Computer-assisted Oral English Test on a Large Scale

    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.

  5. Computer assisted radiology

    The proceedings of the CAR'93 symposium present the 126 oral papers and the 58 posters contributed to the four Technical Sessions entitled: (1) Image Management, (2) Medical Workstations, (3) Digital Image Generation - DIG, and (4) Application Systems - AS. Topics discussed in Session (1) are: picture archiving and communication systems, teleradiology, hospital information systems and radiological information systems, technology assessment and implications, standards, and data bases. Session (2) deals with computer vision, computer graphics, design and application, man computer interaction. Session (3) goes into the details of the diagnostic examination methods such as digital radiography, MRI, CT, nuclear medicine, ultrasound, digital angiography, and multimodality imaging. Session (4) is devoted to computer-assisted techniques, as there are: computer assisted radiological diagnosis, knowledge based systems, computer assisted radiation therapy and computer assisted surgical planning. (UWA). 266 figs

  6. Computer-Assisted Vocabulary Acquisition: The CSLU Vocabulary Tutor in Oral-Deaf Education.

    Barker, Lecia J.

    2003-01-01

    Deficits in vocabulary have a negative impact on literacy and interpersonal interaction for deaf children. As part of an evaluation, an outcomes assessment was conducted to determine the effectiveness of a computer-based vocabulary tutor in an elementary auditory/oral program. Participants were 19 children, 16 profoundly deaf and 3 hearing. The vocabulary tutor displays line drawings or photographs of the words to be learned while a computer-generated avatar of a "talking head" provides synthesized audiovisual speech driven from text. The computer system also generates printed words corresponding to the imaged items. Through audiovisual reception, children memorized up to 218 new words for everyday household items. After 4 weeks, their receptive vocabulary was tested, using the avatar to speak the name of each item. Most of the students retained more than half of the new words. The freely available vocabulary tutor, whose characteristics can be tailored to individual need, can provide a language-intensive, independent learning environment to supplement classroom teaching in content areas. PMID:15448067

  7. Computer Assisted Testing of Spoken English: A Study of the SFLEP College English Oral Test System in China

    John Lowe

    2009-06-01

    Full Text Available This paper reports on the on-going evaluation of a computer-assisted system (CEOTS for the assessing of spoken English skills among Chinese university students. This system is being developed to deal with the negative backwash effects of the present system of assessment of speaking skills which is only available to a tiny minority. We present data from a survey of students at the developing institution (USTC, with follow-up interviews and further interviews with English language teachers, to gauge the reactions to the test and its impact on language learning. We identify the key issue as being one of validity, with a tension existing between construct and consequential validities of the existing system and of CEOTS. We argue that a computer-based system seems to offer the only solution to the negative backwash problem but the development of the technology required to meet current construct validity demands makes this a very long term prospect. We suggest that a compromise between the competing forms of validity must therefore be accepted, probably well before a computer-based system can deliver the level of interaction with the examinees that would emulate the present face-to-face mode.

  8. Computer-assisted psychotherapy

    Wright, Jesse H.; Wright, Andrew S.

    1997-01-01

    The rationale for using computers in psychotherapy includes the possibility that therapeutic software could improve the efficiency of treatment and provide access for greater numbers of patients. Computers have not been able to reliably duplicate the type of dialogue typically used in clinician-administered therapy. However, computers have significant strengths that can be used to advantage in designing treatment programs. Software developed for computer-assisted therapy gen...

  9. Computer assisted mathematical programming

    Lucas, CA; Mitra, G

    1987-01-01

    A Computer Assisted Mathematical Programming (Modelling) System (CAMPS) is described in this paper. The system uses program generator techniques for model creation and contrasts with earlier approaches which use a special purpose language to construct models. Thus no programming skill is required to formulate a model. In designing the system we have first analysed the salient components of the mathematical programming activity. A mathematical programming model is usually constructed by progre...

  10. Computer assisted radiology

    CAR'89 is intended to serve as a forum for discussion between experts from the medical sciences e.g., radiology, radiotherapy, nuclear medicine, orthopaedia, cardiology, neurology and surgery and professionals from the computer and physical sciences. Computer assisted radiological diagnosis, orthopaedics, therapy, and planning are the main subjects of the symposium and the panel discussion. The state of the art and research results in the area of CAR are evaluated. (DG)

  11. Computer - Assisted Accounting

    SORIN-CIPRIAN TEIUŞAN

    2009-01-01

    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 co...

  12. [Computer-assisted surgery].

    Micali, Salvatore

    2011-01-01

    The broad range of Computer Assisted Surgery (CAS) represents the integration of computer technology in surgical procedures for presurgical planning, guiding or manipulation. Surgical robots and surgical endoscopic navigation are the most challenging applications to urology. A surgical robot is defined as a computer-controlled manipulator with artificial sensing which can be programmed to move, and position tools to carry out surgical tasks. In urology, robots have been tested in two areas: endourology and laparoscopy. Surgical navigation allows the surgeon to process data from pre- and intraoperative sources, aiming at purification and presentation of the most relevant information. Image-guided systems (IGS), augmented reality (AR) and navigation in endoscopic soft tissue surgery represent the three main topics of surgical urological navigation. IGS involve matching the coordinates from medical imaging (preoperative registration) with coordinates from the patient in the operating room (registration and updating images). IGS have become the standard of care in providing navigational assistance during neurosurgery, offering subsurface and functional information to the surgeon. PMID:21452161

  13. A Comparison of Fully Automated Methods of Data Analysis and Computer Assisted Heuristic Methods in an Electrode Kinetic Study of the Pathologically Variable [Fe(CN) 6 ] 3–/4– Process by AC Voltammetry

    Morris, Graham P.

    2013-12-17

    Fully automated and computer assisted heuristic data analysis approaches have been applied to a series of AC voltammetric experiments undertaken on the [Fe(CN)6]3-/4- process at a glassy carbon electrode in 3 M KCl aqueous electrolyte. The recovered parameters in all forms of data analysis encompass E0 (reversible potential), k0 (heterogeneous charge transfer rate constant at E0), α (charge transfer coefficient), Ru (uncompensated resistance), and Cdl (double layer capacitance). The automated method of analysis employed time domain optimization and Bayesian statistics. This and all other methods assumed the Butler-Volmer model applies for electron transfer kinetics, planar diffusion for mass transport, Ohm\\'s Law for Ru, and a potential-independent Cdl model. Heuristic approaches utilize combinations of Fourier Transform filtering, sensitivity analysis, and simplex-based forms of optimization applied to resolved AC harmonics and rely on experimenter experience to assist in experiment-theory comparisons. Remarkable consistency of parameter evaluation was achieved, although the fully automated time domain method provided consistently higher α values than those based on frequency domain data analysis. The origin of this difference is that the implemented fully automated method requires a perfect model for the double layer capacitance. In contrast, the importance of imperfections in the double layer model is minimized when analysis is performed in the frequency domain. Substantial variation in k0 values was found by analysis of the 10 data sets for this highly surface-sensitive pathologically variable [Fe(CN) 6]3-/4- process, but remarkably, all fit the quasi-reversible model satisfactorily. © 2013 American Chemical Society.

  14. Two Computer-Assisted Experiments

    Kraftmakher, Yaakov

    2013-01-01

    Two computer-assisted experiments are described: (i) determination of the speed of ultrasound waves in water and (ii) measurement of the thermal expansion of an aluminum-based alloy. A new data-acquisition system developed by PASCO scientific is used. In both experiments, the "Keep" mode of recording data is employed: the data are…

  15. Computer assisted medical history taking

    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

  16. Computer assisted medical history taking

    Quaak, M J; 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 patient, to answer questions asked to him by an "intelligent" computerized questionnaire. In developing this system, use has been made of a fourthgeneration programming package. The system appeared...

  17. Computer assisted SCFE osteotomy planning

    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.)

  18. Sources of Information on Computer Assisted Instruction

    Dick, Walter; And Others

    1970-01-01

    A directory of projects dealing with computer-assisted instruction, primarily at the college level, based on a survey intended to uncover fugitive sources of information in this field (e.g., unpublished project progress reports). (LS)

  19. Computer assisted radiology and surgery. CARS 2010

    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.

  20. Computer assisted radiology and surgery. CARS 2010

    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. Future Prospects for Computer-Assisted Mathematics

    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.

  2. Computer-Assisted Education System for Psychopharmacology.

    McDougall, William Donald

    An approach to the use of computer assisted instruction (CAI) for teaching psychopharmacology is presented. A project is described in which, using the TUTOR programing language on the PLATO IV computer system, several computer programs were developed to demonstrate the concepts of aminergic transmitters in the central nervous system. Response…

  3. Reducing Mathematics Anxiety with Computer Assisted Instruction.

    Harris, Albert L.; Harris, Jacqueline M.

    1987-01-01

    Student, teacher, and teaching causes of mathematics anxiety are discussed. Computer-assisted instruction can reduce mathematics anxieties due to lack of confidence, negative attitudes, teacher bias, authoritarian teaching, lack of variety, lack of relationship with the real world, emphasis on memorization or on speed, or computer phobia. (MNS)

  4. Computer-Assisted Discovery and Proof

    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.

  5. Evaluating a Computer-Assisted Pronunciation Training (CAPT) Technique for Efficient Classroom Instruction

    Luo, Beate

    2016-01-01

    This study investigates a computer-assisted pronunciation training (CAPT) technique that combines oral reading with peer review to improve pronunciation of Taiwanese English major students. In addition to traditional in-class instruction, students were given a short passage every week along with a recording of the respective text, read by a native…

  6. Computer-Assisted Evaluation of Videokymographic Data

    Novozámský, Adam; Sedlář, Jiří; Zita, A.; Švec, J. G.; Zitová, Barbara; Flusser, Jan; Hauzar, D.

    2013-01-01

    Roč. 1, č. 1 (2013), s. 49-49. ISSN 1805-8698. [EFMI STC Prague Data and Knowledge for Medical Decision Support. 17.04.2013-19.04.2013, Praha] Institutional support: RVO:67985556 Keywords : videokymography * image processing * computerassisted evaluation Subject RIV: JD - Computer Applications, Robotics http://library.utia.cas.cz/separaty/2013/ZOI/novozamsky-computer-assisted evaluation of videokymographic data.pdf

  7. Computer Assisted Learning (CAL) durch Berechnungsexperimente

    Grob, Heinz Lothar (Ed.)

    1994-01-01

    Im Mittelpunkt von Computer Assisted Learning (CAL) steht der Arbeitsplatz eines Studierenden. Durch gezielte DV-Unterstützung soll der Studierende von Routinetätigkeiten entlastet und dazu ermuntert werden, sich vertieft auf theoretisches Neuland zu begeben. Das Spektrum der CAL-Varianten reicht dabei von einfachen Multiple-Choice-Programmen bis zu Multi-User-Produkten wie Planspielen. Realisierte Anwendungsgebiete aus dem wirtschaftswissenschaftlichen Bereich sind beispielsweise Teile der P...

  8. A review of computer-assisted assessment

    CONOLE Gráinne; Warburton, Bill

    2005-01-01

    Pressure for better measurement of stated learning outcomes has resulted in a demand for more frequent assessment. The resources available are seen to be static or dwindling, but Information and Communications Technology is seen to increase productivity by automating assessment tasks. This paper reviews computer-assisted assessment (CAA) and suggests future developments. A search was conducted of CAA-related literature from the past decade to trace the development of CAA from the beginnings o...

  9. Computer Assisted Laboratory Instructions: Learning Outcomes Analysis

    Abdulrasool, Salah Mahdi; Mishra, Rakesh

    2006-01-01

    For this students in mechanical engineering subject area were exposed to computer assisted instructions to satisfy following learning outcomes in computer aided design/computer aided manufacturing module. i- Creation of drawing and design using Computer aided design ii- Using data exchange format (DXF) to create numerical control file iii- Final setup check of computerised numerical control machine iv- Final manufacturing of the product using CNC v- e ytilauQ valuation The t...

  10. Biology teachers’ attitudes toward computer assisted learning

    Županec Vera; Miljanović Tomka; Parezanović-Ristić Snežana

    2014-01-01

    Based on the new technology initiative in Serbian education, we explored primary school teachers’ attitudes toward Computer Assisted Learning (CAL) in biology teaching, as well as the relationships between the teachers’ attitudes and four independent variables: age, teaching experience, teachers’ competence to use modern teaching aids and their professional advanced training in the field of computer applied learning. Fifty-four elementary school biology tea...

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

    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.

  12. Computer-Assisted Exposure Treatment for Flight Phobia

    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…

  13. Computer-assisted Instruction And Discussion

    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.

  14. Computer assisted translation tool for Wikipedia articles

    Laxström, Niklas; Giner, Pau; Thottingal, Santhosh

    2015-01-01

    Wikipedia exists in over 280 languages. The quality and quantity of articles in each language varies greatly. Translating from another Wikipedia is a natural way to add more content, but the translation process is not properly supported in the software used by Wikipedia. Past computer assisted translation tools built for Wikipedia (e.g. WikiBasha) are not commonly used. We created a new tool that adapts to the specific needs of an open community and the specifics of the kind of content in Wik...

  15. Computer Assisted Diagnoses for Red Eye (CADRE)

    Muhammad Zubair Asghar; Abdur Rashid Khan; Muhammad Junaid Asghar

    2009-01-01

    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 wa...

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

    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. Innovative Processes in Computer Assisted Language Learning

    Khaled M. Alhawiti

    2015-02-01

    Full Text Available Reading ability of an individual is believed to be one of the major sections in language competency. From this perspective, determination of topical writings for second language learners is considered tough exam for language instructor. This mixed i.e. qualitative and quantitative research study aims to address the innovative processes in computer-assisted language learning through surveying the reading level and streamline content of the ESL students in the classrooms designed for students. This study is based on empirical research to measure the reading level among the ESL students. The findings of this study have revealed that using the procedures of language preparing such as shortened text as well as assessed component tools used for automatic text simplification is profitable for both the ESL students and the teachers.

  18. Intelligent Computer-Assisted Instruction: An Explanation and Overview.

    Roberts, Franklin C.; Park, Ok-choon

    1983-01-01

    Reviews the structure of intelligent computer assisted instruction (ICAI) systems, gives some examples of such systems, and discusses their relative strengths and weaknesses. Four references are listed. (MBR)

  19. Computer Assisted Diagnoses for Red Eye (CADRE

    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.

  20. Recent developments in computer assisted rehabilitation environments

    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.

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

    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.

  2. Computer Assisted Mechanical Axis and Kinematic TKA

    McEwen, Peter; Mahoharan, Varaguna

    2016-01-01

    Introduction: Total knee arthroplasty (TKA) has traditionally been and largely continues to be aligned mechanically, that being with a neutral coronal plane mechanical tibiofemoral axis and a joint line orientated at 900 to this axis. Femoral component rotation is set by gap balancing or by externally rotating 30 from any of a number femoral reference lines. This produces a rectangular flexion gap and relaxes patellar tracking. Kinematic alignment (KA) is an alternative technique that aims to restore premorbid alignment, joint orientation and ligament tension. The basic premise for this technique is based on evidence that the medial and lateral femoral condyles consistently equate to cylinders of equal or near equal size and that therefore with a fixed radius, cruciate retaining implant, matched distal femoral, posterior femoral and proximal tibial resections, accounting for bone and cartilage already lost will reproduce the premorbid joint line and restore native premorbid kinematics. Femoral rotation is therefore referenced off the prearthritic posterior condylar axis (PCA) that is on average internally rotated to the AP axis. Kinematic alignment therefore has the potential to challenge patellar tracking, increase patellar load and potentially increase patellar complications. Method: Case control study – level of evidence III-2. Between November 2012 and June 2013 the senior author completed 104 consecutive computer assisted (CAS) kinematically aligned total knee arthroplasties (TKA) with a cruciate retaining, fixed bearing, single radius implant. The results of these surgeries were compared with the results of 91 consecutive CAS mechanically aligned TKA done between November 2011 and October 2012 using the same navigation system and implant Implant sizing and positioning as well as gap measurement and ligament balance was done with computer assistance in all cases. Data was collected prospectively and analysed retrospectively. Results: The Oxford Knee Score

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

    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

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

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

    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. PMID:27134436

  6. Research on the Use of Computer-Assisted Instruction.

    Craft, C. O.

    1982-01-01

    Reviews recent research studies related to computer assisted instruction (CAI). The studies concerned program effectiveness, teaching of psychomotor skills, tool availability, and factors affecting the adoption of CAI. (CT)

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

    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...

  8. Cost-sensitive active learning for computer-assisted translation

    González Rubio, Jesús; Casacuberta Nolla, Francisco

    2014-01-01

    Machine translation technology is not perfect. To be successfully embedded in real-world applications, it must compensate for its imperfections by interacting intelligently with the user within a computer-assisted translation framework. The interactive¿predictive paradigm, where both a statistical translation model and a human expert collaborate to generate the translation, has been shown to be an effective computer-assisted translation approach. However, the exhaustive supervision of all tra...

  9. Current state of computer-assisted trauma surgery

    Dirhold, Barbara M.; Citak, Mustafa; Al-Khateeb, Hesham; Haasper, Carl; Kendoff, Daniel; Krettek, Christian; Citak, Musa

    2012-01-01

    Computer assisted surgery (CAS) was first used in neurosurgery. Currently, CAS has gained popularity in several surgical disciplines including urology and abdominal surgery. In trauma and orthopaedic surgery, computer assisted systems are used for fracture reduction, planning and positioning of implants as well as the accurate implantation of hip and knee prostheses. The patient’s anatomy is virtualized and the surgical instruments integrated into the digitized image background, thus allowing...

  10. Oral N-acetylcysteine reduces bleomycin-induced lung damage and mucin Muc5ac expression in rats.

    Mata, M; Ruíz, A; Cerdá, M; Martinez-Losa, M; Cortijo, J; Santangelo, F; Serrano-Mollar, A; Llombart-Bosch, A; Morcillo, E J

    2003-12-01

    Oxidative stress is involved in the pathogenesis of pulmonary fibrosis, therefore antioxidants may be of therapeutic value. Clinical work indicates that N-acetylcysteine (NAC) may be beneficial in this disease. The activity of this antioxidant was examined on bleomycin-induced lung damage, mucus secretory cells hyperplasia and mucin Muc5ac gene expression in rats. NAC (3 mmol x kg(-1) x day(-1)) or saline was given orally to Sprague-Dawley rats for 1 week prior to a single intratracheal instillation of bleomycin (2.5 U x kg(-1)) and for 14 days postinstillation. NAC decreased collagen deposition in bleomycin-exposed rats (hydroxyproline content was 4,257+/-323 and 3,200+/-192 microg x lung(-1) in vehicle- and NAC-treated rats, respectively) and lessened the fibrotic area assessed by morphometric analysis. The bleomycin-induced increases in lung tumour necrosis factor-alpha and myeloperoxidase activity were reduced by NAC treatment. The numbers of mucus secretory cells in airway epithelium, and the Muc5ac messenger ribonucleic acid and protein expression, were markedly augmented in rats exposed to bleomycin. These changes were significantly reduced in NAC-treated rats. These results indicate that bleomycin increases the number of airway secretory cells and their mucin production, and that oral N-acetylcysteine improved pulmonary lesions and reduced the mucus hypersecretion in the bleomycin rat model. PMID:14680076

  11. Computer-assisted radiological quantification of rheumatoid arthritis

    Specific objective was to develop the layout and structure of a platform for effective quantification of rheumatoid arthritis (RA). A fully operative Java stand-alone application software (RheumaCoach) was developed to support the efficacy of the scoring process in RA (Web address: http://www.univie.ac.at/radio/radio.htm). Addressed as potential users of such a program are physicians enrolled in clinical trials to evaluate the course of RA and its modulation with drug therapies and scientists developing new scoring modalities. The software 'RheumaCoach' consists of three major modules: The Tutorial starts with 'Rheumatoid Arthritis', to teach the basic pathology of the disease. Afterwards the section 'Imaging Standards' explains how to produce proper radiographs. 'Principles - How to use the 'Larsen Score', 'Radiographic Findings' and 'Quantification by Scoring' explain the requirements for unbiased scoring of RA. At the Data Input Sheet care was taken to follow the radiologist's approach in analysing films as published previously. At the compute sheet the calculated Larsen-Score may be compared with former scores and the further possibilities (calculate, export, print, send) are easily accessible. In a first pre-clinical study the system was tested in an unstructured. Two structured evaluations (30 fully documented and blinded cases of RA, four radiologists scored hands and feet with or without the RheumaCoach) followed. Between the evaluations we permanently improved the software. For all readers the usage of the RheumaCoach fastened the procedure, all together the scoring without computer-assistance needed about 20 % percent more time. Availability of the programme via the internet provides common access for potential quality control in multi-center studies. Documentation of results in a specifically designed printout improves communication between radiologists and rheumatologists. The possibilities of direct export to other programmes and electronic

  12. Accuracy of computer-assisted cervicle pedicle screw installation

    Objective: To investigate the accuracy of computer-assisted cervical pedicle screw installation and the reason of screw malposition. Methods: A total of 172 cervical pedicle screws were installed by computer-assisted navigation for 30 patients with lower cervical spinal diseases. All the patients were examined by X-ray and CT after operation. Screw's position and direction were measured on the sagittal and transectional images of intraoperative navigation and post-operative CT. Then linear regression analysis was taken between navigational and post-operative CT's images. Results: Two screws perforated the upper pedicle wall, 3 perforated the lateral pedicle wall.There was a positive linear correlation between navigational and post-operative CT's images. Conclusion: Computer-assisted navigation can provide the high accuracy of cervical pedicle screw installation and excursion phenomenon is reason of screw malposition. (authors)

  13. Impact of Interleukin-18 Polymorphisms -607A/C and -137G/C on Oral Cancer Occurrence and Clinical Progression

    Tsai, Hsiu-Ting; Hsin, Chung-Han; Hsieh, Yi-Hsien; Tang, Chih-Hsin; Yang, Shun-Fa; Lin, Chiao-Wen; Chen, Mu-Kuan

    2013-01-01

    Background The purpose of this study was to identify gene polymorphisms of interleukin-18 (IL-18) -607A/C and -137G/C specific to patients with oral cancer susceptibility and clinicopathological status. Methodology and Principal Findings A total of 1,126 participants, including 559 healthy people and 567 patients with oral cancer, were recruited for this study. Allelic discrimination of -607A/C (rs1946518) and -137G/C (rs187238) polymorphisms of the IL-18 gene was assessed by a real-time PCR ...

  14. Computer-Assisted Percutaneous Scaphoid Fixation: Concepts and Evolution

    Smith, Erin J.; Ellis, Randy E.; Pichora, David R.

    2013-01-01

    Background The treatment for undisplaced scaphoid waist fractures has evolved from conventional cast immobilization to percutaneous screw insertion. Percutaneous fixation reduces some of the risks of open surgery, but can be technically demanding and carries the risk of radiation exposure. Recently, computer-assisted percutaneous scaphoid fixation (CAPSF) has been gaining interest.

  15. Framework for Computer Assisted Instruction Courseware: A Case Study.

    Betlach, Judith A.

    1987-01-01

    Systematically investigates, defines, and organizes variables related to production of internally designed and implemented computer assisted instruction (CAI) courseware: special needs of users; costs; identification and definition of realistic training needs; CAI definition and design methodology; hardware and software requirements; and general…

  16. Integrating Computer-Assisted Translation Tools into Language Learning

    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…

  17. Technical Aspects of Computer-Assisted Instruction in Chinese.

    Cheng, Chin-Chaun; Sherwood, Bruce

    1981-01-01

    Computer assisted instruction in Chinese is considered in relation to the design and recognition of Chinese characters, speech synthesis of the standard Chinese language, and the identification of Chinese tone. The PLATO work has shifted its orientation from provision of supplementary courseware to implementation of independent lessons and…

  18. Computer Assisted Job Skill Evaluation (CAJSE). 1994-1995.

    Tarrant County Junior Coll. District, Ft. Worth, TX.

    The Computer-Assisted Job Skill Evaluation (CAJSE) project was conducted to develop an evaluation software instrument that could be used in career and technical education programs throughout Texas to provide immediate performance evaluations in vocational-technical and career education. Ten instructors selected from vocational-technical education…

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

    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…

  20. Computer-assisted information graphics from the graphic design perspective

    Marcus, A.

    1983-11-01

    Computer-assisted information graphics can benefit by adopting some of the working processes, principles, and areas of concern typical of information-oriented graphic designers. A review of some basic design considerations is followed by a discussion of the creation and design of a prototype nonverbal narrative which combines symbols, charts, maps, and diagrams.

  1. Implementing Computer-Assisted Instruction: The Garland Way.

    Douglas, Eli; Bryant, Deborah G.

    1985-01-01

    After much study, administrators at the Garland Independent School District (Texas) adopted a minicomputer-based system which provides curriculum development for kindergarten through grade 12. The process of implementing computer-assisted instruction in this district is described. Results after the first year and teacher training are examined. (JN)

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

    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.…

  3. A Computer-Assisted Oil Exploration and Production Game.

    Nichols, Gary John

    1987-01-01

    Describes a computer-assisted oil exploration and production game for students involved in a short course in petroleum geology. Outlines the game and its procedures, and provides sample structure maps generated by the computer in the course of playing the game. (TW)

  4. Robust Natural Language Parsing in Computer-Assisted Language Instruction.

    Imlah, W. G.; du Boulay, J. B. H.

    1985-01-01

    Describes an attempt to build a computer-assisted language instruction program which can trap and comment on grammatical errors such as subject/verb agreement by a purely syntactic analysis, that is, without recourse to word meanings. The program aims to increase educational effectiveness and to reduce the number of separate stored answers.…

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

    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.

  6. System/360 Computer Assisted Network Scheduling (CANS) System

    Brewer, A. C.

    1972-01-01

    Computer assisted scheduling techniques that produce conflict-free and efficient schedules have been developed and implemented to meet needs of the Manned Space Flight Network. CANS system provides effective management of resources in complex scheduling environment. System is automated resource scheduling, controlling, planning, information storage and retrieval tool.

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

    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…

  8. Impact of interleukin-18 polymorphisms -607A/C and -137G/C on oral cancer occurrence and clinical progression.

    Hsiu-Ting Tsai

    Full Text Available BACKGROUND: The purpose of this study was to identify gene polymorphisms of interleukin-18 (IL-18 -607A/C and -137G/C specific to patients with oral cancer susceptibility and clinicopathological status. METHODOLOGY AND PRINCIPAL FINDINGS: A total of 1,126 participants, including 559 healthy people and 567 patients with oral cancer, were recruited for this study. Allelic discrimination of -607A/C (rs1946518 and -137G/C (rs187238 polymorphisms of the IL-18 gene was assessed by a real-time PCR with the TaqMan assay. There was no significant association between IL-18 -607A/C polymorphism and oral cancer risk. However, among alcohol consumers, people with A/A homozygotes of IL-18 -607A/C polymorphism had a 2.38-fold (95% CI=1.17-4.86; p=0.01 increased risk of developing oral cancer compared with those with C/C homozygotes. The participants with G/C heterozygotes of IL-18 -137 polymorphism had a 1.64-fold (95% CI: 1.08-2.48; p=0.02 increased risk of developing oral cancer compared with those with G/G wild type homozygotes. Both sets of statistics were determined after adjusting for confounding factors. Among people who had exposure to oral cancer-related environmental risk factors such as areca, alcohol, and tobacco consumption, the adjusted odd ratios and 95% confidence intervals were increased to a 2.02-fold (95% CI=1.01-4.04; p=0.04, 4.04 (95% CI=1.65-9.87; p=0.002 and a 1.66-fold (95% CI=1.00-2.84; p=0.05 risk of developing oral cancer. However, patients with G/C alleles of IL-18 -137 were correlated with a lower clinical stage (AOR=0.59; 95% CI=0.39-0.89; p=0.01, smaller tumor size (AOR=0.56; 95% CI=0.35-0.87; p=0.01, and non-lymph node metastasis (AOR=0.51; 95% CI=0.32-0.80; p=0.003. CONCLUSION: IL-18 -137 G/C gene polymorphism may be a factor that increases the susceptibility to oral cancer, as well as a protective factor for oral cancer progression. The interactions of gene to oral cancer-related environmental risk factors have a synergetic

  9. Computer-Assisted Assay of Respiratory Sounds of Children Suffering from Bronchial Asthma

    Furman Е.G.

    2014-03-01

    Full Text Available The aim of the investigation was to develop a computer processing technique of respiratory sounds and determine their spectral characteristics for bronchial asthma diagnosis. Materials and Methods. The proposed method is based on analysis of fast Fourier transform (FFT parameters of respiratory sound spectrum and their comparison in asthmatic children and healthy volunteers. The technique was applied to study respiratory sounds in 5 children with incomplete control of bronchial asthma, aged 10.9±2.1 years, and in 5 healthy schoolchildren (12.0±2.2 years. Respiratory sounds were recorded at three points: anterior thoracic surface, above trachea to the right, and inside oral cavity. A signal recorded by microphone Sony (ECM-77B was amplified and digitalized using a Sound Blaster (Singapore. A recorded signal was computer processed. A computer-assisted assay was performed using software developed on the basis of a standard software package MATLAB. Results. Breath sounds of patients with bronchial asthma are characterized by a specific wheezing presented as harmonic amplitude increase with frequency near to 400 Hz; wheezing period ranges from 80 to 250 ms. These peculiar properties of wheezing made it possible to suggest a computer processing method of respiratory sounds based on the analysis of approximation function for harmonic amplitude-frequency relationship. Approximation function was chosen as superposition of two functions: the first function characterizing natural attenuation of sounds with increasing frequency; the second one describing typical of asthmatic breathing pathological increase of harmonic amplitudes with frequency near to 400 Hz. The program developed self-diagnoses wheezing typical for asthmatic children. Conclusion. A computer-assisted assay of respiratory sounds can be the basic to an objective, independent of a doctor’s subjective opinions, automated computer-assisted diagnostic technique of respiratory sounds typical

  10. Morphology and measurements of the cervical spinal cord in computer-assisted myelography

    Thirty-six control subjects had Computer Assisted Myelography (CAM) using the EMI CT 5005 scanner. The normal cervical cord is elliptical, more circular at the upper and lower ends and flatter in the mid-segments. Asymptomatic cord deformities, usually mild, were present in nine subjects (25%). Four measurements, namely, sagittal diameter (APD), transverse diameter (TD), area (a) and circumference (c) were made and two more parameters calculated i.e. APD/TD ratio and circularity (=4 π a/c2). These control values from the basis of qualitative and quantitative assessment of cord deformity. When cord measurements are to be used, control values should be obtained for each scanner and procedures should be standardized. (orig.)

  11. Computer-assisted instruction; MR imaging of congenital heart disease

    To develop a software program for computer-assisted instruction on MR imaging of congenital heart disease for medical students and residents to achieve repetitive and effective self-learning. We used a film scanner(Scan Maker 35t) and IBM-PC(486 DX-2, 60 MHz) for acquisition and storage of image data. The accessories attached to the main processor were CD-ROM drive(Sony), sound card(Soundblaster-Pro), and speaker. We used software of Adobe Photoshop(v 3.0) and paint shop-pro(v 3.0) for preprocessing image data, and paintbrush from microsoft windows 3.1 for labelling. The language used for programming was visual basic(v 3.0) from microsoft corporation. We developed a software program for computer-assisted instruction on MR imaging of congenital heart disease as an effective educational tool

  12. Computer-assisted estimating for the Los Alamos Scientific Laboratory

    An analysis is made of the cost estimating system currently in use at the Los Alamos Scientific Laboratory (LASL) and the benefits of computer assistance are evaluated. A computer-assisted estimating system (CAE) is proposed for LASL. CAE can decrease turnaround and provide more flexible response to management requests for cost information and analyses. It can enhance value optimization at the design stage, improve cost control and change-order justification, and widen the use of cost information in the design process. CAE costs are not well defined at this time although they appear to break even with present operations. It is recommended that a CAE system description be submitted for contractor consideration and bid while LASL system development continues concurrently

  13. Computer-assisted estimating for the Los Alamos Scientific Laboratory

    Spooner, J.E.

    1976-02-01

    An analysis is made of the cost estimating system currently in use at the Los Alamos Scientific Laboratory (LASL) and the benefits of computer assistance are evaluated. A computer-assisted estimating system (CAE) is proposed for LASL. CAE can decrease turnaround and provide more flexible response to management requests for cost information and analyses. It can enhance value optimization at the design stage, improve cost control and change-order justification, and widen the use of cost information in the design process. CAE costs are not well defined at this time although they appear to break even with present operations. It is recommended that a CAE system description be submitted for contractor consideration and bid while LASL system development continues concurrently.

  14. Soft Tissue Biomechanical Modeling for Computer Assisted Surgery

    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 ...

  15. CARS 2009. Computer assisted radiology and surgery. Proceedings

    The CARS 2009 proceedings include contributions and poster sessions concerning different conferences and workshops: computer assisted radiology, 23rd international congress and exhibition, CARS clinical day, 13th annual conference of the international society for computer aided surgery, 10th CARS/SPIE/EuroPACS joint workshop on surgical PACS and the digital operating, 11th international workshop on computer-aided diagnosis, 15th computed maxillofacial imaging congress, CARS - computer assisted radiology and surgery, 1st EPMA/CARS workshop on personalized medicine and ICT, JICARS - Japanese institutes of CARS, 1st EuroNotes/CTAC/CARS workshop on NOTES: an interdisciplinary challenge, 13th annual conference for computer aided surgery, 27th international EuroPACS meeting.

  16. Toward computer-assisted diagnosis and telemedicine in ophthalmology

    Marrugo, A.; Millán, M. S.; Cristóbal, G.; Gabarda, S.; Šorel, Michal; Šroubek, Filip

    2012-01-01

    Roč. 2012, č. 6 (2012), s. 1-3. ISSN 1818-2259 R&D Projects: GA MŠk 1M0572 Institutional research plan: CEZ:AV0Z10750506 Institutional support: RVO:67985556 Keywords : computer-aided diagnosis * medical and retinal image * deconvolution * telemedicine Subject RIV: JD - Computer Applications, Robotics http://library.utia.cas.cz/separaty/2012/ZOI/sorel-toward computer-assisted diagnosis and telemedicine in ophthalmology.pdf

  17. Computer-Assisted Troubleshooting for Efficient Off-board Diagnosis

    Warnquist, Håkan

    2011-01-01

    This licentiate thesis considers computer-assisted troubleshooting of complex products such as heavy trucks. The troubleshooting task is to find and repair all faulty components in a malfunctioning system. This is done by performing actions to gather more information regarding which faults there can be or to repair components that are suspected to be faulty. The expected cost of the performed actions should be as low as possible. The work described in this thesis contributes to solving the tr...

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

    Debra M. Hardison

    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 training focused on prosody using a real-time computerized pitch display. Multiple exemplars produced by native speakers (NSs) of French and stored on ...

  19. Computer-assisted ex vivo, normothermic small bowel perfusion

    Stangl, M.J.; Krapp, J.; Theodorou, D; Eder, M.; Hammer, C; Land, W.; Schildberg, Friedrich Wilhelm

    2000-01-01

    Background: In the present study, a technique for computer-assisted, normothermic, oxygenated, ex vivo, recirculating small bowel perfusion was established as a tool to investigate organ pretreatment protocols and ischemia/reperfusion phenomena. A prerequisite for the desired setup was an organ chamber for ex vivo perfusion and the use of syngeneic whole blood as perfusate. Methods: The entire small bowel was harvested from Lewis rats and perfused in an organ chamber ex vivo for at least 2 h....

  20. Computer-assisted learning: Evidence from a randomized experiment

    Abhijit Banerjee; Esther Duflo; Leigh Linden

    2003-01-01

    This note presents the results obtained after the first year of a two-year randomized evaluation of a computer assisted learning (CAL) program in Vadodara, India. The CAL program, implemented by a NGO, took advantage of the donation of four computers to each municipal primary school in Vadodara by the state government. The program provided each child in the fourth standard with two hours of shared computer time in which students played educational games that reinforced mathematics competencie...

  1. Online learning via dynamic reranking for Computer Assisted Translation

    MARTÍNEZ GÓMEZ, PASCUAL; Sanchis Trilles, Germán; Casacuberta Nolla, Francisco

    2011-01-01

    New techniques for online adaptation in computer assisted translation are explored and compared to previously existing approaches. Under the online adaptation paradigm, the translation system needs to adapt itself to real-world changing scenarios, where training and tuning may only take place once, when the system is set-up for the first time. For this purpose, post-edit information, as described by a given quality measure, is used as valuable feedback within a dynamic reranking algorithm. Tw...

  2. A qualitative model for computer-assisted instruction in cardiology.

    Julen, N.; Siregar, P.; Sinteff, J. P.; Le Beux, P.

    1998-01-01

    CARDIOLAB is an interactive computational framework dedicated to teaching and computer-aided diagnosis in cardiology. The framework embodies models that simulate the heart's electrical activity. They constitute the core of a Computer-Assisted Instruction (CAI) program intended to teach, in a multimedia environment, the concepts underlying rhythmic disorders and cardiac diseases. The framework includes a qualitative model (QM) which is described in this paper. During simulation using QM, dynam...

  3. Computer-assisted percutaneous scaphoid fixation: concepts and evolution.

    Smith, Erin J; Ellis, Randy E; Pichora, David R

    2013-11-01

    Background The treatment for undisplaced scaphoid waist fractures has evolved from conventional cast immobilization to percutaneous screw insertion. Percutaneous fixation reduces some of the risks of open surgery, but can be technically demanding and carries the risk of radiation exposure. Recently, computer-assisted percutaneous scaphoid fixation (CAPSF) has been gaining interest. Materials and Methods Conventional percutaneous scaphoid fixation is performed under fluoroscopic guidance and involves insertion of a guide wire along the length of the scaphoid to facilitate placement of a cannulated screw. Adapting computer-assisted techniques for scaphoid fixation poses several unique challenges including patient tracking and registration. Results To date, five groups have successfully implemented systems for CAPSF. These systems have implemented wrist immobilization strategies to resolve the issue of patient tracking and have developed unique guidance techniques incorporating 2D fluoroscope, cone-beam CT, and ultrasound, to circumvent patient-based registration. Conclusions Computer-aided percutaneous pinning of scaphoid waist fractures can significantly reduce radiation exposure and has the potential to improve the accuracy of this procedure. This article reviews the rationale for, and the evolution of, CAPSF and describes the key principles of computer-assisted technology. PMID:24436833

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

    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.

  5. The Evolution of Instructional Design Principles for Intelligent Computer-Assisted Instruction.

    Dede, Christopher; Swigger, Kathleen

    1988-01-01

    Discusses and compares the design and development of computer assisted instruction (CAI) and intelligent computer assisted instruction (ICAI). Topics discussed include instructional systems design (ISD), artificial intelligence, authoring languages, intelligent tutoring systems (ITS), qualitative models, and emerging issues in instructional…

  6. The effect of computer-assisted interviewing on data quality: a review of the evidence

    Leeuw, E.D. de

    2008-01-01

    Computer assisted telephone interviewing, and to a lesser degree, computer assisted face-to-face interviewing, are by now widely used in survey research. Recently, self-administered forms of computer-assisted data collection, such as web surveys, have become extremely popular. Advocates of computer

  7. Computer-assisted indexing for the INIS database

    INIS has identified computer-assisted indexing as areas where information technology could assist best in maintaining database quality and indexing consistency, while containing production costs. Subject analysis is a very important but also very expensive process in the production of the INIS database. Given the current necessity to process an increased number of records, including subject analysis, without additional staff, INIS as well as the member states need improvements in their processing efficiency. Computer assisted subject analysis is a promising way to achieve this. The quality of the INIS database is defined by its inputting rules. The Thesaurus is a terminological control device used in translating from the natural language of documents, indexers or users into a more constrained system language. It is a controlled and dynamic vocabulary of semantically and generically related terms. It is the essential tool for subject analysis as well as for advanced search engines. To support the identification of descriptors in the free text (title, abstract, free keywords) 'hidden terms' have been introduced as extension of the Thesaurus, which identify phrases or character strings of free text and point to the valid descriptor, which should be suggested. In the process of computer-assisted subject analysis the bibliographic records (including title and abstract) are analyzed by the software, resulting in a list of suggested descriptors. Within the working platform (graphical user interface) the suggested descriptors are sorted by importance (by their relevance for the content of the document) and the subject specialist clearly sees the highlighted context from which the terms were selected. The system allows the subject specialist to accept or reject descriptors from the suggested list and to assign additional descriptors when necessary. First experiences show that a performance enhancement of about 80-100% can be achieved in the subject analysis process. (author)

  8. Computer-assisted design of transducers for ultrasonic sensor systems

    In this contribution, possibilities and methods for computer-assisted design of ultrasound transducers are described. These transducers are essential for an ultrasonic sensor design, e.g. for continuous non-invasive determination of quantities that are important in process technology. To achieve technical reliability and robustness, the precise determination of all acoustic properties of the used sensor materials is of great importance. Problem-oriented modeling, numerical simulation, special optimization algorithms and improved methods for the visualization of propagating waves offer new and promising possibilities for developing ultrasonic transducers with enhanced properties

  9. Introducing computer-assisted assessment: considerations for the new practitioner

    Lingard, Matt

    2005-01-01

    Computer-assisted assessment (CAA) is an all-encompassing term referring to the use of computers in the assessment process. This includes the use of computers for the delivery, marking, and recording of assessments as well as the provision of feedback. The use of CAA, which is really a relatively new development in UK Higher Education, is thought to be increasing significantly (Boyle & O’Hare, 2003). In part, the recent growth of CAA has been driven by the general increase in the use of learn...

  10. An evaluation of cadmium telluride detectors for computer assisted tomography.

    Chu, D; Kaufman, L; Hosier, K; Hoenninger, J

    1978-11-01

    Cadmium telluride (CdTe) presents a set of extremely attractive features as an X-ray detector for computer assisted tomography (CAT). It is stable and easily handled; has a high detection efficiency and very efficient conversion of energy to charge; and permits a high element density in a compact configuration. Unfortunately, effects due to "polarization," "tailing," high and variable leakage currents, and long "memory" are incompatible with the needs of CAT instrumentation. Pulse-processing techniques have allowed us to eliminate these problems in positive-sensitive detectors, thus opening the way for utilization of CdTe in CAT. PMID:711945

  11. Computer Assisted Instruction (Cain) For Nuclear Magnetic Resonance Spectroscopy

    A computer assisted instruction program for nuclear magnetic resonance spectroscopy was developed by using Author ware 5.0, Adobe Image Styler 1.0, Adobe Photo shop 7.0 and Flash MX. The contents included the basic theory of 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, the instrumentation of NMR spectroscopy, the two dimensional (2D) NMR spectroscopy and the interpretation of NMR spectra. The program was also provided examples, and exercises, with emphasis on NMR spectra interpretation to determine the structure of unknown compounds and solutions for self study. The questionnaire from students showed that they were very satisfied with the software

  12. An artificial intelligence system for computer-assisted menu planning.

    Petot, G J; Marling, C; Sterling, L

    1998-09-01

    Planning nutritious and appetizing menus is a complex task that researchers have tried to computerize since the early 1960s. We have attempted to facilitate computer-assisted menu planning by modeling the reasoning an expert dietitian uses to plan menus. Two independent expert systems were built, each designed to plan a daily menu meeting the nutrition needs and personal preferences of an individual client. One system modeled rule-based, or logical, reasoning, whereas the other modeled case-based, or experiential, reasoning. The 2 systems were evaluated and their strengths and weaknesses identified. A hybrid system was built, combining the best of both systems. The hybrid system represents an important step forward because it plans daily menus in accordance with a person's needs and preferences; the Reference Daily Intakes; the Dietary Guidelines for Americans; and accepted aesthetic standards for color, texture, temperature, taste, and variety. Additional work to expand the system's scope and to enhance the user interface will be needed to make it a practical tool. Our system framework could be applied to special-purpose menu planning for patients in medical settings or adapted for institutional use. We conclude that an artificial intelligence approach has practical use for computer-assisted menu planning. PMID:9739801

  13. A computer-assisted process for supersonic aircraft conceptual design

    Johnson, V. S.

    1985-01-01

    Design methodology was developed and existing major computer codes were selected to carry out the conceptual design of supersonic aircraft. A computer-assisted design process resulted from linking the codes together in a logical manner to implement the design methodology. The process does not perform the conceptual design of a supersonic aircraft but it does provide the designer with increased flexibility, especially in geometry generation and manipulation. Use of the computer-assisted process for the conceptual design of an advanced technology Mach 3.5 interceptor showed the principal benefit of the process to be the ability to use a computerized geometry generator and then directly convert the geometry between formats used in the geometry code and the aerodynamics codes. Results from the interceptor study showed that a Mach 3.5 standoff interceptor with a 1000 nautical-mile mission radius and a payload of eight Phoenix missiles appears to be feasible with the advanced technologies considered. A sensitivity study showed that technologies affecting the empty weight and propulsion system would be critical in the final configuration characteristics with aerodynamics having a lesser effect for small perturbations around the baseline.

  14. Computer-assisted morphometric analysis of renal radiation response

    A single x-ray dose of 1,200 to 1,600 rads to the mouse kidney is associated with definite morphologic alteration but minimal functional impairment at six months; this progresses to profound structural and functional impairment by one year after irradiation. Subjective morphologic assessment of renal damage at six months correlates well with total radiation dose, fractionation schedule and energy characteristics of the radiation beam but does not provide adequate quantitative numerical data for sophisticated statistical tests of significance or for comparisons of effect variability at given dose levels. This investigation assessed the applicability of computer-assisted morphometric analysis (CAMA) for quantitation of effects and in making statistical comparisons of significance between kidneys subjectively classified as to degree of histologic alterations. Images of renal cortex tubular nuclei from the various histologic grades were digitized, recorded and analyzed with the CAMA system. Results indicate that the reliability of specific grade assignment by CAMA for individual nuclei was inadequate but that separation of irradiated and unirradiated renal tissue (bivariate group means) was quite distinct and of high reliability. Differences were present among the four irradiated histologic grades, but they were not marked, especially among the three highest grades. More accurate quantitation of nuclear size variations was achieved, and chromatin textural differences were detected that were not apparent to the eye. Computer-assisted morphometric analysis appears to have a valuable application in the quantification and analysis of chronic radiation effects

  15. Computer-assisted instruction: MR imaging of the knee.

    Hillard, A E; Sievert, L J; Boote, E J

    1995-03-01

    Computer-assisted education offers a unique method of learning that is complementary to conventional learning techniques. The regional anatomy of musculoskeletal magnetic resonance (MR) imaging lends itself well to discrete learning modules on the computer. This article describes a computer-assisted educational program for MR imaging of the knee. The program is divided into four sections: MR imaging physics, anatomy, pathology, and a quiz. The program has cross-references between the sections that allow comparison of normal versus pathologic findings, review of specified pathologic entities, and self-testing of comprehension. The student can progress through the program in a linear or nonlinear fashion at his or her own pace. All images in the program were digitally acquired with an MR imager and transferred directly to the computer used to develop the program. The program is available throughout the radiology department on a local area network and in the medical school library on stand-alone units. The program is currently being used at a medical school as a supplement to the recently implemented problem-based learning curriculum and for resident education. PMID:7761651

  16. The Potential of Computer-Assisted Direct Observation Apps

    Daniel Wessel

    2015-01-01

    Full Text Available Direct behavior observation, i.e., without first creating a video recording, is a challenging, one-shot task. The behavior has to be coded accurately during the situation itself. Mobile devices can assist direct observation, and there already are applications available for these purposes. However, the mobile revolution has led to new developments in devices, infrastructure, and market penetration that have opened up new, yet untapped, possibilities. In this article, expanded activity theory is used to highlight the unused potential of computer assisted direct observation (CADO apps. If this potential is realized, it can provide observation with the same advantages online questionnaires and sites like Mechanical Turk have provided for surveys and Internet experiments.

  17. Computer-Assisted Technique for Surgical Tooth Extraction

    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.

  18. Computer assisted surgery for malunited fractures in upper limb

    Our objective was to evaluate the usefulness of computer-assisted preoperative simulation of malunited fractures in the upper limb. Ten patients with malunited fractures underwent multislice computed tomography of both upper limbs with reconstruction of three-dimensional bone models using three-dimensional (3D) software. Preoperative simulation was comprised of four main procedures: performance of virtual corrective osteotomy, matching of reposition with a mirror-image model of the unaffected side, creating new data for the bone defect, and machining of an hydroxyapatite block as bone graft. In addition, we used full-sized three-dimensional virtual reality modeling with a rapid prototyping molding device, and performed preoperative rehearsals of osteotomies using plaster models. All patients tolerated the surgical procedure well. This technique permits the surgeon to recognize and correct three-dimensional deformities of malunited fracture with both accuracy and precision. (author)

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

    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 process data apparently are available. PMID:24274405

  20. Backgrounds of computer-assisted treatment planning in radiation therapy

    Interaction of ionising radiation and living materials causes biological damage of tempory or permanent nature. In radiation therapy this phenomenon is used in a controlled fashion in order to stop the proliferation of malignant cells, while at the same time limiting the permanent damage to healthy tissues and organs to at least tolerable levels. Because of the often relatively small differences in response of malignant growths and normal tissues, the margins between tolerable and intolerable are so small that the greatest precision in treatment planning and execution is required. The nature of this treatment agent implies that the radiation therapist has to rely very much on instrumentally obtained and processed information, in all phases of this medical activities around the patient. In this paper a description is given of the backgrounds of computer-assisted methods which have enabled modern individualised and optimised planning for therapy with high energy X- and gamma beams. (orig.)

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

    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

    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.

  3. The Application of Web-based Computer-assisted Instruction Courseware within Health Assessment

    Xiuyan, Guo

    Health assessment is a clinical nursing course and places emphasis on clinical skills. The application of computer-assisted instruction in the field of nursing teaching solved the problems in the traditional lecture class. This article stated teaching experience of web-based computer-assisted instruction, based upon a two-year study of computer-assisted instruction courseware use within the course health assessment. The computer-assisted instruction courseware could develop teaching structure, simulate clinical situations, create teaching situations and facilitate students study.

  4. Computer-Assisted Synthetic Planning: The End of the Beginning.

    Szymkuć, Sara; Gajewska, Ewa P; Klucznik, Tomasz; Molga, Karol; Dittwald, Piotr; Startek, Michał; Bajczyk, Michał; Grzybowski, Bartosz A

    2016-05-10

    Exactly half a century has passed since the launch of the first documented research project (1965 Dendral) on computer-assisted organic synthesis. Many more programs were created in the 1970s and 1980s but the enthusiasm of these pioneering days had largely dissipated by the 2000s, and the challenge of teaching the computer how to plan organic syntheses earned itself the reputation of a "mission impossible". This is quite curious given that, in the meantime, computers have "learned" many other skills that had been considered exclusive domains of human intellect and creativity-for example, machines can nowadays play chess better than human world champions and they can compose classical music pleasant to the human ear. Although there have been no similar feats in organic synthesis, this Review argues that to concede defeat would be premature. Indeed, bringing together the combination of modern computational power and algorithms from graph/network theory, chemical rules (with full stereo- and regiochemistry) coded in appropriate formats, and the elements of quantum mechanics, the machine can finally be "taught" how to plan syntheses of non-trivial organic molecules in a matter of seconds to minutes. The Review begins with an overview of some basic theoretical concepts essential for the big-data analysis of chemical syntheses. It progresses to the problem of optimizing pathways involving known reactions. It culminates with discussion of algorithms that allow for a completely de novo and fully automated design of syntheses leading to relatively complex targets, including those that have not been made before. Of course, there are still things to be improved, but computers are finally becoming relevant and helpful to the practice of organic-synthetic planning. Paraphrasing Churchill's famous words after the Allies' first major victory over the Axis forces in Africa, it is not the end, it is not even the beginning of the end, but it is the end of the beginning for the

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

    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.

  6. Natural language processing tools for computer assisted language learning

    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.

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

    Francl, L J

    1998-06-01

    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 with other schools and may retain or even increase enrollments through broadened educational opportunities. CADE ranges from complete course offerings and video interaction to supplemental materials on a personal computer for independent learning. A modular approach to course development is the most successfuI model because of the flexibility it offers. While an entire hematology course through CADE is not possible without substantial institutional and faculty investment, supplemental materials can help remotely located students gain an appreciation for hematology. Nematological images, text, computer programs, and other resources can easily be placed on Internet web pages. Nematologists in all sectors need to continue to reach out to the next generation of leaders to tell them what nematologists do and why nematodes are important. The Society of Nematologists can be a leader in the systematic development of CADE in nematology. PMID:19274217

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

    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.

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

    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…

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

    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…

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

    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"…

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

    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…

  13. Accuracy of computer-assisted implant placement with insertion templates

    Naziri, Eleni; Schramm, Alexander; Wilde, Frank

    2016-01-01

    Objectives: The purpose of this study was to assess the accuracy of computer-assisted implant insertion based on computed tomography and template-guided implant placement. Material and methods: A total of 246 implants were placed with the aid of 3D-based transfer templates in 181 consecutive partially edentulous patients. Five groups were formed on the basis of different implant systems, surgical protocols and guide sleeves. After virtual implant planning with the CoDiagnostiX Software, surgical guides were fabricated in a dental laboratory. After implant insertion, the actual implant position was registered intraoperatively and transferred to a model cast. Deviations between the preoperative plan and postoperative implant position were measured in a follow-up computed tomography of the patient’s model casts and image fusion with the preoperative computed tomography. Results: The median deviation between preoperative plan and postoperative implant position was 1.0 mm at the implant shoulder and 1.4 mm at the implant apex. The median angular deviation was 3.6º. There were significantly smaller angular deviations (P=0.000) and significantly lower deviations at the apex (P=0.008) in implants placed for a single-tooth restoration than in those placed at a free-end dental arch. The location of the implant, whether in the upper or lower jaw, did not significantly affect deviations. Increasing implant length had a significant negative influence on deviations from the planned implant position. There was only one significant difference between two out of the five implant systems used. Conclusion: The data of this clinical study demonstrate the accuracy and predictable implant placement when using laboratory-fabricated surgical guides based on computed tomography. PMID:27274440

  14. Reliability analysis framework for computer-assisted medical decision systems

    We present a technique that enhances computer-assisted decision (CAD) systems with the ability to assess the reliability of each individual decision they make. Reliability assessment is achieved by measuring the accuracy of a CAD system with known cases similar to the one in question. The proposed technique analyzes the feature space neighborhood of the query case to dynamically select an input-dependent set of known cases relevant to the query. This set is used to assess the local (query-specific) accuracy of the CAD system. The estimated local accuracy is utilized as a reliability measure of the CAD response to the query case. The underlying hypothesis of the study is that CAD decisions with higher reliability are more accurate. The above hypothesis was tested using a mammographic database of 1337 regions of interest (ROIs) with biopsy-proven ground truth (681 with masses, 656 with normal parenchyma). Three types of decision models, (i) a back-propagation neural network (BPNN), (ii) a generalized regression neural network (GRNN), and (iii) a support vector machine (SVM), were developed to detect masses based on eight morphological features automatically extracted from each ROI. The performance of all decision models was evaluated using the Receiver Operating Characteristic (ROC) analysis. The study showed that the proposed reliability measure is a strong predictor of the CAD system's case-specific accuracy. Specifically, the ROC area index for CAD predictions with high reliability was significantly better than for those with low reliability values. This result was consistent across all decision models investigated in the study. The proposed case-specific reliability analysis technique could be used to alert the CAD user when an opinion that is unlikely to be reliable is offered. The technique can be easily deployed in the clinical environment because it is applicable with a wide range of classifiers regardless of their structure and it requires neither additional

  15. Unsupervised clustering analyses of features extraction for a caries computer-assisted diagnosis using dental fluorescence images

    Bessani, Michel; da Costa, Mardoqueu M.; Lins, Emery C. C. C.; Maciel, Carlos D.

    2014-02-01

    Computer-assisted diagnoses (CAD) are performed by systems with embedded knowledge. These systems work as a second opinion to the physician and use patient data to infer diagnoses for health problems. Caries is the most common oral disease and directly affects both individuals and the society. Here we propose the use of dental fluorescence images as input of a caries computer-assisted diagnosis. We use texture descriptors together with statistical pattern recognition techniques to measure the descriptors performance for the caries classification task. The data set consists of 64 fluorescence images of in vitro healthy and carious teeth including different surfaces and lesions already diagnosed by an expert. The texture feature extraction was performed on fluorescence images using RGB and YCbCr color spaces, which generated 35 different descriptors for each sample. Principal components analysis was performed for the data interpretation and dimensionality reduction. Finally, unsupervised clustering was employed for the analysis of the relation between the output labeling and the diagnosis of the expert. The PCA result showed a high correlation between the extracted features; seven components were sufficient to represent 91.9% of the original feature vectors information. The unsupervised clustering output was compared with the expert classification resulting in an accuracy of 96.88%. The results show the high accuracy of the proposed approach in identifying carious and non-carious teeth. Therefore, the development of a CAD system for caries using such an approach appears to be promising.

  16. Using CamiTK for rapid prototyping of interactive Computer Assisted Medical Intervention applications.

    Promayon, Emmanuel; Fouard, Celine; Bailet, Mathieu; Deram, Aurelien; Fiard, Gaelle; Hungr, Nikolai,; Luboz, Vincent; Payan, Yohan; Sarrazin, Johan; Saubat, Nicolas; Selmi, Sonia Yuki; Voros, Sandrine; Cinquin, Philippe; Troccaz, Jocelyne

    2013-01-01

    International audience Computer Assisted Medical Intervention (CAMI hereafter) is a complex multi-disciplinary field. CAMI research requires the collaboration of experts in several fields as diverse as medicine, computer science, mathematics, instrumentation, signal processing, mechanics, modeling, automatics, optics, etc.

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

    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

  18. Technology and its clinical application in the field of computer-assisted radiology and surgery

    Inamura, K; Lemke, HU

    2007-01-01

    The field of computer-assisted radiology and surgery involves a wide spectrum of topics based on medicine, physics, computer science and even sociology. The progress of development and recent trends in this field is described in this paper. Firstly, the chronological change in presented papers in past international conferences of Computer Assisted Radiology and Surgery (CARS) from 1985 to 2007 is illustrated in terms of topics, which are grouped into six main categories. Secondly, new directi...

  19. Perspectives of Family Physicians on Computer-assisted Health-risk Assessments

    Ahmad, Farah; Skinner, Harvey A; Stewart, Donna E; Levinson, Wendy

    2010-01-01

    Background The firsthand experience of physicians using computer-assisted health-risk assessment is salient for designing practical eHealth solutions. Objective The aim of this study was to enhance understanding about computer-assisted health-risk assessments from physicians’ perspectives after completion of a trial at a Canadian, urban, multi-doctor, hospital-affiliated family practice clinic. Methods A qualitative approach of face-to-face, in-depth, semi-structured interviews was used. All ...

  20. Examining Pre-Service Mathematics Teachers’ Attitudes Towards Computer Assisted Education

    Küçük, Betül; İşleyen, Tevfik; DENİZ, Demet; Şükrü CANSIZ

    2014-01-01

    Nowadays, the use of computers involves in our lives more with the developing technology. Facilitating the work of people, computers provide convenience in the field of education as in every other field. Fulfilling the educational needs of individuals has caused the emergence of various concepts such as Computer Assisted Education (CAE) and Computer Assisted Teaching (CAT). The aim of this study is to determine the attitudes of pre-service mathematics teachers, who were studying at the Depart...

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

    Ioana Iacob

    2009-01-01

    Full Text Available 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.

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

    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.

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

    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

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

    Benassarou, M; Benassarou, A; Meyer, C

    2013-08-01

    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. PMID:23928252

  5. A Fourth Generation Distance Education System: Integrating Computer-Assisted Learning and Computer Conferencing.

    Lauzon, Allan C.; Moore, George A. B.

    1989-01-01

    Reviews the literature on Keller's Personalized System of Instruction (PSI), computer-assisted learning (CAL), computer conferencing (CC), and forms of instruction, then discusses how they can be integrated into a delivery system to enhance distance learning. Asynchronous individualized instruction and group instruction are also discussed. (28…

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

    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…

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

    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…

  8. From Computer Assisted Language Learning (CALL) to Mobile Assisted Language Use (MALU)

    Jarvis, Huw; Achilleos, Marianna

    2013-01-01

    This article begins by critiquing the long-established acronym CALL (Computer Assisted Language Learning). We then go on to report on a small-scale study which examines how student non-native speakers of English use a range of digital devices beyond the classroom in both their first (L1) and second (L2) languages. We look also at the extent to…

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

    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…

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

    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, Bulgaria: TENCompetence. Retrieved June 30th, 2006, from http://dspace.learningnetworks.org

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

    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)

  12. L'Enseignement des langues assiste par ordinateur: nouvelle pedagogie? (Computer Assisted Language Instruction: New Pedagogy?).

    Elkabas, Charles

    1989-01-01

    Recent second language instruction computer software focuses almost exclusively on the structures and forms of language, and on programed learning instead of developing communicative skills. Until artificial intelligence changes these old behavioristic principles, computer-assisted language instruction can only play a minor role in language…

  13. The Effectiveness of Computer-Assisted Instruction in Teaching Introductory Statistics

    Basturk, Ramazan

    2005-01-01

    The focus of this study is to demonstrate and discuss the educational advantages of Computer Assisted Instruction (CAI). A quasi-experimental design compared learning outcomes of participants in an introductory statistics course that integrated CAI to participants in a Lecture-only introductory statistics course. Reviews of participants' identical…

  14. Computer-Assisted Scheduling of Army Unit Training: An Application of Simulated Annealing.

    Hart, Roland J.; Goehring, Dwight J.

    This report of an ongoing research project intended to provide computer assistance to Army units for the scheduling of training focuses on the feasibility of simulated annealing, a heuristic approach for solving scheduling problems. Following an executive summary and brief introduction, the document is divided into three sections. First, the Army…

  15. Critical Thinking Outcomes of Computer-Assisted Instruction versus Written Nursing Process.

    Saucier, Bonnie L.; Stevens, Kathleen R.; Williams, Gail B.

    2000-01-01

    Nursing students (n=43) who used clinical case studies via computer-assisted instruction (CAI) were compared with 37 who used the written nursing process (WNP). California Critical Thinking Skills Test results did not show significant increases in critical thinking. The WNP method was more time consuming; the CAI group was more satisfied. Use of…

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

    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…

  17. Establishment of a Computer Assisted Instructional Program to Teach Managerial Decision Making

    Brennan, Patricia Flatley

    1981-01-01

    The rapid growth of the health care industry demands that nurse managers be competent in decision making. The development of a computer assisted instructional package designed to meet this demand is described. Utilizing a branching technique, a decision model, written in FORTRAN, presents a user with decision junctures in selected scenarios. The model aids in teaching as well as evaluating managerial decision making.

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

    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…

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

    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…

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

    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…

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

    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…

  2. Integrated workflow for computer assisted history matching on a channelized reservoir

    Peters, E.; Wilschut, F.; Leeuwenburgh, O.; Hooff, P.M.E. van

    2011-01-01

    Increasingly computer assisted techniques are used for history matching reservoir models. Such methods will become indispensable in view of the increasing amount of information generated by intelligent wells, in which case manual interpretation becomes too time consuming. Also, with the increasing p

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

    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…

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

    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…

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

    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…

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

    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…

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

    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.

  8. The Effects of Trait Anxiety and Dogmatism on State Anxiety During Computer-Assisted Learning.

    Rappaport, Edward

    In this study of the interaction between anxiety trait (A-trait), anxiety state (A-state), and dogmatism in computer-assisted instruction (CAI), subjects were selected on the basis of extreme scores on a measure of anxiety and on a measure of dogmatism. The subjects were presented with a CAI task consisting of difficult mathematical problems. The…

  9. The Lower Manhattan Project: A New Approach to Computer-Assisted Learning in History Classrooms.

    Crozier, William; Gaffield, Chad

    1990-01-01

    The Lower Manhattan Project, a computer-assisted undergraduate course in U.S. history, enhances student appreciation of the historical process through research and writing. Focuses on the late nineteenth and early twentieth centuries emphasizing massive immigration, rapid industrialization, and the growth of cities. Includes a reading list and…

  10. Using Java and Dynamic HTML To Develop Collaborative, Computer Assisted Learning.

    Lester, Callum R.; Robinson, David A.; Hamilton, Neil M.

    The construction of a very fast network backbone between all Scottish universities, in conjunction with the formation of a common core curriculum for Scottish medical schools teaching child health, has provided the schools with an opportunity to provide collaborative, computer assisted learning (CAL) across the World Wide Web, delivered by a…

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

    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…

  12. A Computer-Assisted Teaching System in Pharmacology for Health Professionals.

    Pazdernik, Thomas L.; Walaszek, Edward J.

    1983-01-01

    Experiences with a combined computer-assisted and computer-managed pharmacology course that allows both scheduled and individual pacing are described. Students with low aptitudes achieved significantly higher scores on the pharmacology portion of a national medical examination after participation. (Author/MSE)

  13. Effects of a Computer-Assisted-Instruction Program in a Prison Setting: An Experimental Study.

    Batchelder, John Stuart; Rachal, John R.

    2000-01-01

    A study to determine the extent of differences between inmates who used computer-assisted instruction and those who received traditional instruction in a prison education program found no differences in posttest scores. Possible explanations included attitudes toward testing, motivation, teacher support, dynamics of prison culture, and software…

  14. Results and Analysis of a Computer Assisted Instructional Program in Basic Skills in a Detention Center.

    Diem, Richard A.

    An evaluation of a computer assisted educational (CAE) program using the PLATO system at a Texas detention center included an examination of attitudes and perceptions from (1) inmates participating and not participating in jail education programs, (2) trustees, (3) educational program staff, (4) chaplaincy staff, (5) guards assigned to the…

  15. Computer-Assisted Instruction in Undergraduate Organic Chemistry: Design, Application, and Evaluation. Technical Report 10.

    Culp, George

    The computer-assisted instruction (CAI) program in undergraduate organic chemistry at the University of Texas was evaluated by an experimental design in 1969 and found to be successful. This report discusses in detail the formation of the design, its application, and the method of evaluation. The program itself included 15 teaching modules that…

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

    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)…

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

    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…

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

    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…

  19. The Social Influence of Two Computer-Assisted Career Guidance Systems: DISCOVER and SIGI.

    Sampson, James P., Jr.; And Others

    1992-01-01

    Compared perceptions of expertness, attractiveness, and trustworthiness of computer-assisted guidance systems, as measured by adapted version of Counselor Rating Form, for 107 college students in two treatment conditions (DISCOVER and SIGI) and computer imaging control condition. Findings showed that students in both treatment conditions had more…

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

    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…

  1. A computer assistant for remote collaborative troubleshooting of domestic medical instruments

    Blanson Henkemans, O.A.; Sawirjo, V.M.; Mast, C.A.P.G. van der; Neerincx, M.A.; Lindenberg, J.

    2008-01-01

    Patients suffering from chronic illness, such as diabetes, use various domestic instruments as part of their selfcare. For older adults, there is a need for assistance to use the instruments adequately and to solve technical failures. Following the eHealth concept, we designed a computer assistant f

  2. A Computer Assisted Application in Preschool Education: Seasons and Their Characteristics

    Akçay, Nilufer Okur

    2016-01-01

    In this study, it is aimed to determine the effect of computer-assisted instruction while teaching the subject seasons to preschool students on the academic success. The sample of the study consists of 86 children from the nursery classes of private and official schools in Agri city center. As data collecting tools General Achievement Test used as…

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

    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...

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

    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...

  5. Feasibility of Computer-Assisted Elementary Keyboard Music Instruction. Final Report.

    Wichita Public Schools, KS.

    A study was made to determine the feasibility, infeasibility, or deferred feasibility of adapting a computer-assisted instruction (CAI) system to an existing non-automated program for providing keyboard experiences to elementary school children. A systematic task-by-task approach was adopted for the study: learning objectives were assessed, the…

  6. Decreasing Transition Times in Elementary School Classrooms: Using Computer-Assisted Instruction to Automate Intervention Components

    Hine, Jeffrey F.; Ardoin, Scott P.; Foster, Tori E.

    2015-01-01

    Research suggests that students spend a substantial amount of time transitioning between classroom activities, which may reduce time spent academically engaged. This study used an ABAB design to evaluate the effects of a computer-assisted intervention that automated intervention components previously shown to decrease transition times. We examined…

  7. Teaching Sight Words: A Comparison between Computer-Assisted and Teacher-Taught Methods.

    Baumgart, Diane; VanWalleghem, John

    1987-01-01

    The study compared computer assisted instruction with a speech synthesizer and teacher instruction to teach grocery sight words to three moderately retarded adults in an alternating treatments design. Two of the subjects learned equally well with either method while one learned only in the teacher-taught situation. (Author/DB)

  8. A Practical Introduction to Authoring for Computer-Assisted Instruction. Part I--IPS.

    Barker, P. G; Steele, J. W.

    1983-01-01

    Presents an overview of Instructional Programming System, an authoring tool used for production of programs for computer-assisted instruction, including its language, structure, and mode of operations. Illustrative examples of use and results of initial investigations of its potential as tool in open-learning environment are given. Eighteen…

  9. The Effect on Retention of Computer Assisted Instruction in Science Education

    Kara, Izzet

    2008-01-01

    The aim of this research is to determine the retention effect of Computer Assisted Instruction (CAI) on students' academic achievement for teaching the Physics topics. The research includes the Force and Pressure units of 7th grade Science Lesson. In this research, 132 students were structured as both control and experiment groups. Traditional…

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

    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

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

    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…

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

    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…

  13. Detection of defects in logs using computer assisted tomography (CAT) scanning

    The Chalk River Nuclear Laboratories of AECL have performed a preliminary feasibility study on the applicability of computer assisted tomographic techniques to detect the internal structure of logs. Cross sections of three logs have been obtained using a medical CAT scanner. The results show that knots, rot and growth rings are easily recognized in both dry and wet logs

  14. Using Simultaneous Prompting and Computer-Assisted Instruction to Teach Story Writing to Students with Autism

    Pennington, Robert C.; Ault, Melinda Jones; Schuster, John W.; Sanders, Ann

    2011-01-01

    In the current study, the researchers evaluated the effects of simultaneous prompting and computer-assisted instruction on the story-writing responses of 3 males with autism, 7 to 10 ears of age. Classroom teachers conducted all probe and training sessions. The researchers used a multiple baseline across participants design to evaluate the…

  15. Learning to Use a Word Processor with Concurrent Computer-Assisted Instruction.

    Biemans, Harm J. A.; Simons, P. Robert-Jan

    1992-01-01

    Effects of embedding regulation questions and regulation hints in a concurrent computer-assisted instruction program aimed at word processor use were examined for 133 Dutch second-grade vocational education students. Results support the value of regulation questions and hints in learning to use the word processing program. (SLD)

  16. The Organization and Evaluation of a Computer-Assisted, Centralized Immunization Registry.

    Loeser, Helen; And Others

    1983-01-01

    Evaluation of a computer-assisted, centralized immunization registry after one year shows that 93 percent of eligible health practitioners initially agreed to provide data and that 73 percent continue to do so. Immunization rates in audited groups have improved significantly. (GC)

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

    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…

  18. Fabric of Life: The Design of a System for Computer-Assisted Instruction in Histology.

    Loo, S. K.; And Others

    1995-01-01

    Describes the establishment of a library of computer images of histological preparations and the use of this library for computer-assisted instruction. Images from various organ systems along with line diagrams are stored on a central file server which can be accessed from remote terminals. The Fabric of Life program allows testing on each image…

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

    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

  20. From computer-assisted intervention research to clinical impact: The need for a holistic approach.

    Ourselin, Sébastien; Emberton, Mark; Vercauteren, Tom

    2016-10-01

    The early days of the field of medical image computing (MIC) and computer-assisted intervention (CAI), when publishing a strong self-contained methodological algorithm was enough to produce impact, are over. As a community, we now have substantial responsibility to translate our scientific progresses into improved patient care. In the field of computer-assisted interventions, the emphasis is also shifting from the mere use of well-known established imaging modalities and position trackers to the design and combination of innovative sensing, elaborate computational models and fine-grained clinical workflow analysis to create devices with unprecedented capabilities. The barriers to translating such devices in the complex and understandably heavily regulated surgical and interventional environment can seem daunting. Whether we leave the translation task mostly to our industrial partners or welcome, as researchers, an important share of it is up to us. We argue that embracing the complexity of surgical and interventional sciences is mandatory to the evolution of the field. Being able to do so requires large-scale infrastructure and a critical mass of expertise that very few research centres have. In this paper, we emphasise the need for a holistic approach to computer-assisted interventions where clinical, scientific, engineering and regulatory expertise are combined as a means of moving towards clinical impact. To ensure that the breadth of infrastructure and expertise required for translational computer-assisted intervention research does not lead to a situation where the field advances only thanks to a handful of exceptionally large research centres, we also advocate that solutions need to be designed to lower the barriers to entry. Inspired by fields such as particle physics and astronomy, we claim that centralised very large innovation centres with state of the art technology and health technology assessment capabilities backed by core support staff and open

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

    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. PMID:27475417

  2. A computer-assisted quality assurance system for an emergency medical service.

    Stewart, R D; Burgman, J; Cannon, G M; Paris, P M

    1985-01-01

    A busy urban emergency medical service answering more than 50,000 calls each year developed a plan for quality assurance using a computer-assisted model designed to employ a full-time quality assurance officer whose work was supplemented with computer evaluation of EMS field reports. The development of standardized reporting formats, protocols and computer programs enabled a significant improvement in detection of errors of documentation and patient care. Investigated cases rose dramatically in the month following implementation of the system, from five patient care errors per month to 35 (P less than .05), and from 50 documentation errors to 265 per month (P less than .05). Our experience indicates that computer-assisted evaluation of field performance, as judged by prehospital records, is a useful tool to ensure standards in patient care and EMS recordkeeping. PMID:3964999

  3. Computer-Assisted Hepatocellular Carcinoma Ablation Planning Based on 3-D Ultrasound Imaging.

    Li, Kai; Su, Zhongzhen; Xu, Erjiao; Guan, Peishan; Li, Liu-Jun; Zheng, Rongqin

    2016-08-01

    To evaluate computer-assisted hepatocellular carcinoma (HCC) ablation planning based on 3-D ultrasound, 3-D ultrasound images of 60 HCC lesions from 58 patients were obtained and transferred to a research toolkit. Compared with virtual manual ablation planning (MAP), virtual computer-assisted ablation planning (CAP) consumed less time and needle insertion numbers and exhibited a higher rate of complete tumor coverage and lower rate of critical structure injury. In MAP, junior operators used less time, but had more critical structure injury than senior operators. For large lesions, CAP performed better than MAP. For lesions near critical structures, CAP resulted in better outcomes than MAP. Compared with MAP, CAP based on 3-D ultrasound imaging was more effective and achieved a higher rate of complete tumor coverage and a lower rate of critical structure injury; it is especially useful for junior operators and with large lesions, and lesions near critical structures. PMID:27126243

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

    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.

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

    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.

  6. EVALUATING THE COMPUTER-ASSISTED HIV/AIDS EDUCATION INTERVENTION IMPLEMENTED IN SCHOOLS IN UGANDA

    Musiimenta, Angella

    2011-01-01

    ABSTRACTOver 29 years into the epidemic, fighting HIV (Human Immunodeficiency Virus), the virus that causes AIDS (Acquired, Immune, Deficiency, Syndrome) continues to be a global concern. School-based computer-assisted HIV/AIDS interventions can provide innovative ways of preventing HIV among young people from diverse backgrounds in Africa. However, questions of technological, social and organisational readiness cannot be overlooked. This is because of: (1) being health interventions implemen...

  7. Evaluation of effectiveness of computer assisted learning in biochemistry for first year medical students

    Wilma Delphine Silvia, C. R.; H. Ravish; Suresh, D. R.; Roopa Kulkarni; Manjunath, S; Anitha D’Souza; H. Ramya Udupa; S. Jayashree; Smitha, P.; Sandeep Kumar

    2016-01-01

    Background: Significance of computer assisted learning (CAL) programme is to complement existing undergraduate teaching methods is yet to be explored. Aim: This experimental pilot study was undertaken to assess the utility of CAL programme for first year medical students in learning medical biochemistry. Materials & Method: This prospective study included first year medical students divided into 3 groups comprised of 50 students each. CAL programme was conducted on 3 days in a month for 5 con...

  8. Computer-assisted design of Nb-based in-situ composites and superalloys

    This paper highlights a computer-assisted alloying approach for designing ductile Nb solid solution alloys. An extension of this approach to improve the fracture resistance of Nb-based silicides, Laves phases, and in-situ composites is described and its utility is evaluated against experimental data. Possible application of this approach to designing Nb-based superalloys containing a microstructure of Nb (bcc) solid solution with ordered B2 or L12 intermetallics is elucidated to identify potential obstacles. (orig.)

  9. Thinking the unthinkable: using project risk management when introducing computer-assisted assessments

    Harwood, Ian A.; Warburton, Bill I.

    2004-01-01

    As the introduction of a computer-assisted assessment (CAA) is inherently risky, it is perhaps surprising to see how little coverage formalised risk management gains in the CAA literature. By defining the introduction of CAA as a project, this paper draws on the established project risk management literature. A cross-case analysis of six CAA applications is given, with numerous risks being identified. The concept of 'risk efficiency' is used to show how formalised project risk management can ...

  10. Use of computer assisted orthopedic surgery in pelvic and acetabular trauma

    Amr Abdelgawad; Ralitsa Akins; Kanlic, Enes M

    2011-01-01

    Computer assisted orthopedic surgery (CAOS) is a recent concept inorthopedics. Its use in orthopedic trauma is becoming more popular.Pelvic and acetabular trauma is one of the applications where CAOScan play an important role to facilitate the surgery. In this review article, we provide an overview of the structure of CAOS with specialemphasis on its role in pelvic and acetabular trauma. Th e use of CAOShas many advantages in the field of orthopedic trauma, however, manyobstacles are still pr...

  11. Effectiveness of a computer assisted learning (CAL) package to raise awareness of autism

    diMambro Benedict; Chuthapisith Jariya; Doody Gillian

    2009-01-01

    Abstract Background Promoting awareness of autism in populations who work with children may result in an earlier diagnosis of the condition. In this study, a computer assisted learning (CAL) package, containing educationally appropriate knowledge about autism was developed; and the effectiveness of this CAL package was evaluated. Methods The CAL package was developed using computer software, "Xerte" and "Flash Macromedia". The effectiveness of the CAL package was evaluated in 32 childcare stu...

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

    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 ...

  13. Learning Analytics: The next frontier for computer assisted language learning in big data age

    Yu Qinglan

    2015-01-01

    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 le...

  14. Computer-assisted modeling: Contributions of computational approaches to elucidating macromolecular structure and function: Final report

    The Committee, asked to provide an assessment of computer-assisted modeling of molecular structure, has highlighted the signal successes and the significant limitations for a broad panoply of technologies and has projected plausible paths of development over the next decade. As with any assessment of such scope, differing opinions about present or future prospects were expressed. The conclusions and recommendations, however, represent a consensus of our views of the present status of computational efforts in this field

  15. Sequential computer-assisted hepatobiliary scintigraphy in the evaluation of conjoined twins

    Thirty-six cases of xiphopagus twins have been reported since 1689. In some of these cases, radionuclide imaging techniques were used to evaluate the possibility of a common liver. The authors present a case in which computer-assisted sequential hepatobiliary imaging helped them to demonstrate the presence of separate hearts, independent hepatobiliary systems, and the absence of crossover of the hepatic circulation in xiphopagus twins shortly after delivery

  16. Sequential computer-assisted hepatobiliary scintigraphy in the evaluation of conjoined twins

    Wong, D.F.; Espinola, D.; Camargo, E.E.; Douglass, K.H.; Koller, D.W.; Wagner, H.N. Jr.

    1984-03-01

    Thirty-six cases of xiphopagus twins have been reported since 1689. In some of these cases, radionuclide imaging techniques were used to evaluate the possibility of a common liver. The authors present a case in which computer-assisted sequential hepatobiliary imaging helped them to demonstrate the presence of separate hearts, independent hepatobiliary systems, and the absence of crossover of the hepatic circulation in xiphopagus twins shortly after delivery.

  17. An existence of simple choreographies for N-body problem - a computer assisted proof

    Kapela, Tomasz; Zgliczynski, Piotr

    2003-01-01

    We consider a question of finding a periodic solution for the planar Newtonian N-body problem with equal masses, where each body is travelling along the same closed path. We provide a computer assisted proof for the following facts: local uniqueness and convexity of Chenciner and Montgomery Eight, an existence (and local uniqueness) for Gerver's SuperEight for 4-bodies and a doubly symmetric linear chain for 6-bodies.

  18. The mini-screen: an innovative device for computer assisted surgery systems.

    Mansoux, Benoit; Nigay, Laurence; Troccaz, Jocelyne

    2005-01-01

    International audience In this paper we focus on the design of Computer Assisted Surgery (CAS) systems and more generally Augmented Reality (AR) systems that assist a user in performing a task on a physical object. Digital information or new actions are defined by the AR system to facilitate or to enrich the natural way the user would interact with the real environment. We focus on the outputs of such systems, so that additional digital information is smoothly integrated with the real envi...

  19. Comparable corpus approach to explore the influence of computer assisted translation systems on textuality

    Candel-Mora, Miguel Ángel

    2015-01-01

    Computer-assisted translation tools have significantly influenced translators' workflow, especially with respect to productivity and consistency criteria. However, not much has been investigated about the effects and constraints that these tools have on translators' decision-making process during the language transfer stage. Therefore, the objective of this paper is to outline a framework for analysis to identify potential textual constraints due to the segmentation function of computer-assis...

  20. Computer-assisted spatial reconstruction of cerebral blood vessels and intracranial aneurysms

    Nikolić Igor M.

    2006-01-01

    Introduction. Today, many medical procedures are based on image analysis with the aim of providing accurate diagnosis and optimal treatment. The goal of this report was to present clinical implications of computer-assisted geometric design of carotid aneurysms. Material and methods. In this study, the three-dimensional reconstruction was based on the approximation power of the parametric spline function, which achieves interpolation and surface fitting of the arterial information obtained by ...

  1. Designing a Computer-Assisted Clinic to Cope with the Evolution of Pacemaker Technology

    Pfeil, Catherine N.; Keltz, Paul D.; Gertz, Edward W.; Okawachi, Melanie H.

    1983-01-01

    A computer-assisted program for follow-up monitoring of implanted cardiac pacemakers has been in operation at the San Francisco Veterans Administration Medical Center since 1977. It was originally created at a time when the technology of pacemakers was stable and only a few parameters could be measured or telemetered. Two recent developments have necessitated a major reassessment of this project as a well as redesign of the entire computer infrastructure: the advent of multi-programmable and ...

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

    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 processor WordPerfect. The three regulation conditions were characterized by: (1) content help plus regulation questions plus regulation hints; (2) content help plus regulation questions; (3) content he...

  3. Computer Assisted Learning for Bases of Electronics. From LAN to Hypermedia Implementation

    Topa, Marina Dana; Festila, Lelia; Burian, Adrian; Neag, Marius

    1999-01-01

    This paper presents the implementation of a Computer Assisted Learning system, from Local Area Networks to Hypermedia environment. The user Professor is endowed with authoring support for tutorials and multiple-choice tests, with knowledge data-bases managing facilities and with access to complete records of students results. The user Student can attend a tutorial or take a test on a self-initiative base or during a session managed interactively by the Professor. The LAN system, implemented i...

  4. Computer-Assisted Learning Based on Cumulative Vocabularies, Conceptual Networks and Wikipedia Linkage

    Lahti, Lauri

    2015-01-01

    In this doctoral dissertation we propose new methods and frameworks for computer-assisted learning based on self-designed and self-implemented software prototypes supplied with user testing. Motivated by previous research identifying possibly similar scale-free small-world properties in Wikipedia online encyclopedia, social networks and human brain networks, we suggest that collaboratively generated knowledge structures of Wikipedia can be used to support learning. After reviewing background ...

  5. Progress in Computer-Assisted Inductive Theorem Proving by Human-Orientedness and Descente Infinie?

    Wirth, Claus-Peter

    2009-01-01

    In this short position paper we briefly review the development history of automated inductive theorem proving and computer-assisted mathematical induction. We think that the current low expectations on progress in this field result from a faulty narrow-scope historical projection. Our main motivation is to explain--on an abstract but hopefully sufficiently descriptive level--why we believe that future progress in the field is to result from human-orientedness and descente infinie.

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

    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. Computer-assisted planning and dosimetry for radiation treatment of head and neck cancer in Cameroon

    This evaluation was part of a multicenter, multinational study sponsored by the International Agency for Atomic Energy (Vienna) to investigate a simple, reliable computer-assisted planning and dosimetry system for radiation treatment of head and neck cancers in developing countries. Over a 13-month period (April 1992-April 1993), 120 patients with histologically-proven head or neck cancer were included in the evaluation. In each patient, planning and dosimetry were done both manually and using the computer-assisted system. The manual and computerized systems were compared on the basis of accuracy of determination of the outer contour, target volume, and critical organs; volume inequality resolution; structure heterogeneity correction; selection of the number, angle, and size of beams; treatment time calculation; availability of dosimetry predictions; and duration and cost of the procedure. Results demonstrated that the computer-assisted procedure was superior over the manual procedure, despite less than optimal software. The accuracy provided by the completely computerized procedure is indispensable for Level II radiation therapy, which is particularly useful in tumors of the sensitive, complex structures in the head and neck. (authors). 7 refs., 3 tabs

  8. What Are Oral Cavity and Oropharyngeal Cancers?

    ... Research Get Involved Find Local ACS Learn About Cancer » Oral Cavity and Oropharyngeal Cancer » Detailed Guide » What are ... how cancers start and spread, see What Is Cancer? Oral cavity cancer, or just oral cancer, is cancer ...

  9. Efficacy of a novel auto-fluorescence imaging system with computer-assisted color analysis for assessment of colorectal lesions

    2013-01-01

    AIM: To evaluate the efficacy of computer-assisted color analysis of colorectal lesions using a novel auto-fluorescence imaging (AFI) system to distinguish neoplastic lesions from non-neoplastic lesions and to predict the depth of invasion.

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

    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.

  11. Investigation of Reproductive Traits and a Computer-Assisted Single Artificial Insemination Procedure in Mares in Subtropical Taiwan

    CHAN, Jacky Peng-Wen; WU, Jui-Te; CHENG, Feng-Pang

    2008-01-01

    The objective of this study was to report the reproductive traits of mares by ultrasonography and hormone analyses in subtropical Taiwan and the successful artificial breeding of mares using a self-developed computer-assisted single insemination technique. A previously developed computer-assisted image analysis technique at our reproduction centre was employed to determine the optimal time for artificial insemination (AI). In the 8 mares that underwent this AI procedure, ovulations all occurr...

  12. Computer-assisted assessment of ultrasound real-time elastography: Initial experience in 145 breast lesions

    Purpose: To develop and evaluate a computer-assisted method of quantifying five-point elasticity scoring system based on ultrasound real-time elastography (RTE), for classifying benign and malignant breast lesions, with pathologic results as the reference standard. Materials and methods: Conventional ultrasonography (US) and RTE images of 145 breast lesions (67 malignant, 78 benign) were performed in this study. Each lesion was automatically contoured on the B-mode image by the level set method and mapped on the RTE image. The relative elasticity value of each pixel was reconstructed and classified into hard or soft by the fuzzy c-means clustering method. According to the hardness degree inside lesion and its surrounding tissue, the elasticity score of the RTE image was computed in an automatic way. Visual assessments of the radiologists were used for comparing the diagnostic performance. Histopathologic examination was used as the reference standard. The Student's t test and receiver operating characteristic (ROC) curve analysis were performed for statistical analysis. Results: Considering score 4 or higher as test positive for malignancy, the diagnostic accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were 93.8% (136/145), 92.5% (62/67), 94.9% (74/78), 93.9% (62/66), and 93.7% (74/79) for the computer-assisted scheme, and 89.7% (130/145), 85.1% (57/67), 93.6% (73/78), 92.0% (57/62), and 88.0% (73/83) for manual assessment. Area under ROC curve (Az value) for the proposed method was higher than the Az value for visual assessment (0.96 vs. 0.93). Conclusion: Computer-assisted quantification of classical five-point scoring system can significantly eliminate the interobserver variability and thereby improve the diagnostic confidence of classifying the breast lesions to avoid unnecessary biopsy

  13. Computer-assisted assessment of ultrasound real-time elastography: Initial experience in 145 breast lesions

    Zhang, Xue; Xiao, Yang [Shenzhen Key Lab for Molecular Imaging, Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen (China); Zeng, Jie [Department of Medical Ultrasonics, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou (China); Qiu, Weibao; Qian, Ming; Wang, Congzhi [Shenzhen Key Lab for Molecular Imaging, Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen (China); Zheng, Rongqin, E-mail: zhengronggin@hotmail.com [Department of Medical Ultrasonics, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou (China); Zheng, Hairong, E-mail: hr.zheng@siat.ac.cn [Shenzhen Key Lab for Molecular Imaging, Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen (China)

    2014-01-15

    Purpose: To develop and evaluate a computer-assisted method of quantifying five-point elasticity scoring system based on ultrasound real-time elastography (RTE), for classifying benign and malignant breast lesions, with pathologic results as the reference standard. Materials and methods: Conventional ultrasonography (US) and RTE images of 145 breast lesions (67 malignant, 78 benign) were performed in this study. Each lesion was automatically contoured on the B-mode image by the level set method and mapped on the RTE image. The relative elasticity value of each pixel was reconstructed and classified into hard or soft by the fuzzy c-means clustering method. According to the hardness degree inside lesion and its surrounding tissue, the elasticity score of the RTE image was computed in an automatic way. Visual assessments of the radiologists were used for comparing the diagnostic performance. Histopathologic examination was used as the reference standard. The Student's t test and receiver operating characteristic (ROC) curve analysis were performed for statistical analysis. Results: Considering score 4 or higher as test positive for malignancy, the diagnostic accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were 93.8% (136/145), 92.5% (62/67), 94.9% (74/78), 93.9% (62/66), and 93.7% (74/79) for the computer-assisted scheme, and 89.7% (130/145), 85.1% (57/67), 93.6% (73/78), 92.0% (57/62), and 88.0% (73/83) for manual assessment. Area under ROC curve (A{sub z} value) for the proposed method was higher than the A{sub z} value for visual assessment (0.96 vs. 0.93). Conclusion: Computer-assisted quantification of classical five-point scoring system can significantly eliminate the interobserver variability and thereby improve the diagnostic confidence of classifying the breast lesions to avoid unnecessary biopsy.

  14. The Role of Computer-Assisted Technology in Post-Traumatic Orbital Reconstruction: A PRISMA-driven Systematic Review.

    Wan, Kelvin H; Chong, Kelvin K L; Young, Alvin L

    2015-01-01

    Post-traumatic orbital reconstruction remains a surgical challenge and requires careful preoperative planning, sound anatomical knowledge and good intraoperative judgment. Computer-assisted technology has the potential to reduce error and subjectivity in the management of these complex injuries. A systematic review of the literature was conducted to explore the emerging role of computer-assisted technologies in post-traumatic orbital reconstruction, in terms of functional and safety outcomes. We searched for articles comparing computer-assisted procedures with conventional surgery and studied outcomes on diplopia, enophthalmos, or procedure-related complications. Six observational studies with 273 orbits at a mean follow-up of 13 months were included. Three out of 4 studies reported significantly fewer patients with residual diplopia in the computer-assisted group, while only 1 of the 5 studies reported better improvement in enophthalmos in the assisted group. Types and incidence of complications were comparable. Study heterogeneities limiting statistical comparison by meta-analysis will be discussed. This review highlights the scarcity of data on computer-assisted technology in orbital reconstruction. The result suggests that computer-assisted technology may offer potential advantage in treating diplopia while its role remains to be confirmed in enophthalmos. Additional well-designed and powered randomized controlled trials are much needed. PMID:26643191

  15. Computer assisted collimation gamma camera: A new approach to imaging contaminated tissues

    Measurement systems with the capability of imaging tissues contaminated with radioactive materials would find relevant applications in medical physics research and possibly in health physics. The latter in particular depends critically on the performance achieved for sensitivity and spatial resolution. An original approach of computer assisted collimation gamma camera (French acronym CACAO) which could meet suitable characteristics has been proposed elsewhere. CACAO requires detectors with high spatial resolution. The present work was aimed at investigating the application of the CACAO principle on a laboratory testing bench using silicon detectors made of small pixels. (author)

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

    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...... from 358 men. A recently developed CASA system, Copenhagen Rigshospitalet Image house sperm Motility Analysis System (CRISMAS) was used for assessment of motility parameters. This system has an editing function which allows correction of tracks made by the computer. Probably due to this function, the...

  17. Computer-assisted mammography in clinical practice: Another set of problems to solve

    To be adopted in radiological practice, computer-assisted diagnosis must address a domain of realistic complexity and have a high performance in terms of speed and reliability. Use of a microcomputer-based system of mammographic diagnoses employing discriminant function analysis resulted in significantly fewer false-positive diagnoses while producing a similar level of correct diagnoses of cancer as normal reporting. Although such a system is a valuable teaching aid, its clinical use is constrained by the problems of unambiguously codifying descriptors, data entry time, and the tendency of radiologists to override predicted diagnoses which conflict with their own

  18. What Can Computer Assisted Language Learning contribute to Foreign Language Pedagogy

    Paul Bangs; Pascual Cantos Gomez

    2004-01-01

    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 se...

  19. State-of-the-art review of nondestructive testing with computer-assisted tomography

    Computer assisted tomography (CAT) has been a revolutionary technique in medical radiology. Recently, CAT scanners started to be used as non-destructive testing facilities in different industrial applications. Most of the application of the new technology are in the areas of petroleum engineering. Majority of this CAT scanner technology has been developed in the U.S.A. However, several Canadian companies have acquired CAT scanners and are using for novel commercial as well as research applications. This paper presents a comprehensive review of advances made in the areas of CAT scan technology as applied to the petroleum industry

  20. Image analysis in modern ophthalmology: from acquisition to computer assisted diagnosis and telemedicine

    Marrugo, A.; Millán, M. S.; Cristóbal, G.; Gabarda, S.; Šorel, Michal; Šroubek, Filip

    Washington: SPIE, 2012, 84360C-1-84360C-10. (Proceedings of SPIE. 8436). ISBN 978-0-8194-9128-2. ISSN 0277-786X. [Optics, Photonics, and Digital Technologies for Multimedia Applications II. Brussels (BE), 17.04.2012-18.04.2012] R&D Projects: GA MŠk 1M0572 Institutional support: RVO:67985556 Keywords : computer-aided diagnosis * medical image * retinal image * telemedicine Subject RIV: JD - Computer Applications, Robotics http://library.utia.cas.cz/separaty/2012/ZOI/sroubek-image analysis in modern ophthalmology from acquisition to computer assisted diagnosis and telemedicine.pdf

  1. Determination of the dynamic nonlinearity of semiconductor and combined detectors for computer-assisted tomography

    The experimental arrangement described reproduces values of the x-ray photon flux density that are typical of computer-assisted tomography (108-1010 cm-2 x sec-1) and its rates of relative change. The authors give the results of determination of the dynamic nonlinearity γ/sup d/ of combined detectors [CsI(Tl) +- Si photodiode and CdWO4 + FEU-60 photomultiplier] and semiconducting CdTe. The CdTe detector has the highest value, γ/sup d/ ≥ 36%, while CdWO4 + FEU-60 has the lowest values, γ/sup d/ ≤ 1%, on the trailing edge of the current signal

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

    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

  3. Comparison of Computer-Assisted Planning and Manual Planning for Depth Electrode Implantations in Epilepsy

    Nowell, M.; Sparks, R; Zombori, G.; Miserocchi, A; Rodionov, R.; Diehl, B.; Wehner, T.; Baio, G; Trevisi, G.; Tisdall, M; Ourselin, S.; McEvoy, A.; Duncan, J

    2015-01-01

    Object: To evaluate the clinical utility of multi-trajectory computer-assisted planning (CAP) software to plan stereoEEG (SEEG) electrode arrangements in a cohort of 18 patients. Methods: 18 patients underwent SEEG for evaluation of epilepsy at a single centre between August 2013 and August 2014. Planning of electrodes was performed manually and stored using EpiNavTM software. CAP was developed as a planning tool in EpiNavTM. The user preselects a set of cerebral targets and optimised traject...

  4. Computer-Assisted Generation of Patterns and Virtual Reality Techniques for Fashion Design

    Naud, Mickael; Richard, Paul; Chapeau-Blondeau, François

    2009-03-01

    We present a methodology for the design of aesthetic patterns and their visualization on virtual clothes. Generated patterns are directly mapped on the dress of a virtual mannequin. Furthermore, patterns sets may be interactively mapped on the virtual dress using a specific 3D interaction technique called Back-and-Forth. Pattern generation involves different mathematical approaches such as iterated function systems (IFS) and nonlinear trajectory models. Both model parameters and color space exploration is performed through a simple user interface. This work contributes to promote both computer assistance in the context of mass customization for fashion design.

  5. Computer assisted tomography for the non-destructive evaluation of hydrogen-induced cracking in steel

    Computer assisted tomography (CAT) was used to assess hydrogen-induced cracking in steel exposed to an H2S-saturated ('sour') environment. In this case the environment was the NACE TM-02-84 test for susceptibility to hydrogen-induced cracking. The feasibility of using CAT in this application was shown in a previous paper. This study extends the application of CAT to a quantitative assessment of the cracking. Optimal parameters for CAT imaging in such an application are determined and the advantages of using CAT in comparison to traditional inspection methods are discussed

  6. Integrating Online and Active Learning in a Computer-Assisted Translation Workbench

    Alabau, Vicent; González-Rubio, Jésus; Ortíz-Martínez, Daniel;

    2014-01-01

    This paper describes a pilot study with a computed-assisted translation workbench aiming at testing the integration of online and active learning features. We investigate the effect of these features on translation productivity, using interactive translation prediction (ITP) as a baseline. User...... activity data were collected from five beta testers using key-logging and eye-tracking. User feedback was also collected at the end of the experiments in the form of retrospective think-aloud protocols. We found that OL performs better than ITP, especially in terms of translation speed. In addition, AL...

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

    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.

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

    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.

  9. Computer-assisted surgical planning and intraoperative navigation in the treatment of condylar osteochondroma.

    Yu, H B; Li, B; Zhang, L; Shen, S G; Wang, X D

    2015-01-01

    Mandibular condylar osteochondroma (OC) results in asymmetric prognathism with facial morphology and functional disturbances. The aim of this study was to explore the feasibility of computer-assisted surgical planning combined with intraoperative navigation in the treatment of condylar OC. Five patients with mandibular condylar OC were enrolled in this study. Surgical planning and simulation was performed based on a computed tomography reconstruction model using SurgiCase software. Under the guidance of navigation, a condylar OC resection and conservative condylectomy was carried out via intraoral approach. Simultaneous orthognathic surgery was used to correct the facial asymmetry and malocclusion. All patients healed uneventfully. No facial nerve injury or salivary fistula occurred. Facial symmetry and morphology were greatly improved and stable occlusion was obtained in all cases. Good matching between preoperative planning and postoperative results was achieved. Patients showed no signs of recurrence or temporomandibular joint ankylosis during follow-up of 12-30 months. Computer-assisted surgical planning and intraoperative navigation is a valuable option in the treatment of mandibular condylar OC. PMID:25442742

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

    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.

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

    Buket Demir , Ertuğrul Usta

    2011-09-01

    Full Text Available 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.

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

    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. PMID:24087903

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

    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.

  14. Implementation of Computer Assisted CIPP Model for Evaluation Program of HIV/AIDS Countermeasures in Bali

    I Made Sundayana

    2015-11-01

    Full Text Available One of the fact within economical development of tourism in Bali is indicated by established tourism facilities in order to support Bali tourism industry. Consquently, It has brought up effect that large numbers of new citizen search for occupation to Bali.Those people who came and settle in Bali temporaly or permanently, consequently Bali become heterogeneous.Thus, Bali become over populated. Since, over populated in Bali has risen up the economic sector and it has been spreading HIV /AIDS rapidly. As anticipation and prevention for contagious, developed and spreading HIV of Bali Provinse has regulated (regional act Number 3 2006 concerning of prevention act fr HIV/AIDS. As the matter of fact, regional act is not properly conducted yet as, therefore it is evaluation required f0r the rule and program that have been conducted by the government.One of the technical evaluation can be applied is CIPP model. However, CIPP model is still applied in conventional way and it has not yet contributed accurate evaluational count in processing the data, therefore by using CIPP model of computer assistance. This can be proved by ending up the result of the total program percentage of HIV /AID prevention by conventional counted result as much 88.000%, meanwhile the count with computer assistance end up with 88.400% in result. It shows high category.

  15. Computer-assisted immunohistochemical analysis of cervical cancer biomarkers using low-cost and simple software.

    Hammes, Luciano Serpa; Korte, Jeffrey E; Tekmal, Rajeshwar Rao; Naud, Paulo; Edelweiss, Maria Isabel; Valente, Philip T; Longatto-Filho, Adhemar; Kirma, Nameer; Cunha-Filho, João Sabino

    2007-12-01

    The study of biomarkers by immunohistochemistry (IHC) for cervical cancer and intraepithelial lesions is a promising field. However, manual interpretation of IHC and reproducibility of the scoring systems can be highly subjective. In this article, we present a novel and simple computer-assisted IHC interpretation method based on cyan-magenta-yellow-black (CMYK) color format, for tissues with diaminobenzidine cytoplasmatic staining counterstained with methyl green. This novel method is more easily interpreted than previous computer-assisted methods based on red-green-blue (RGB) color format and presents a strong correlation with the manual H-score. It is simple, objective, and requires only low-cost software and minimal computer skills. Briefly, a total of 67 microscopic images of cervical carcinoma, normal cervix, and negative controls were analyzed in Corel Photo Paint X3 software in CMYK and RGB color format, and compared with manual H-score IHC assessments. The clearest and best positive correlation with the H-score was obtained using the image in CMYK color format and crude values of magenta color (Spearman correlation coefficient=0.84; agreement of 93.33%, PCMYK format, select the area of interest for analysis, and open the color histogram tool to visualize the magenta value. PMID:18091391

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

    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.

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

    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

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

    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.

  19. Segmentation of MR images for computer-assisted surgery of the lumbar spine

    This paper describes a segmentation algorithm designed to separate bone from soft tissue in magnetic resonance (MR) images developed for computer-assisted surgery of the spine. The algorithm was applied to MR images of the spine of healthy volunteers. Registration experiments were carried out on a physical model of a spine generated from computed tomography (CT) data of a surgical patient. Segmented CT, manually segmented MR and MR images segmented using the developed algorithm were compared. The algorithm performed well at segmenting bone from soft tissue on images taken of healthy volunteers. Registration experiments showed similar results between the CT and MR data. The MR data, which were manually segmented, performed worse on visual verification experiments than both the CT and semi-automatic segmented data. The algorithm developed performs well at segmenting bone from soft tissue in MR images of the spine as measured using registration experiments. (author)

  20. PARTICULARITIES OF EDUCATIONAL OBJECTS IN COMPUTER-ASSISTED LEARNING FOR PERSONS WITH DISABILITIES

    Narcisa ISĂILĂ

    2010-12-01

    Full Text Available The current trend in computer-assisted learning is the creation of reusable learning objects. They can be used independently or can be coupled to make lessons that best fit the users' learning needs. From this perspective, the specific of learning objects for people with disabilities is to ensure accessibility and usability. Using standards in the process of creating learning objects provide flexibility in achieving lessons, thus being helpful for educational content creators (teachers. Metadata have an essential role in achieving interoperability and provide standardized information about the learning objects, allowing the searching, accessing and their finding. The compliance of eLearning standards ensures the compatibility and portability of materials from one system to another, which reduces the time and cost of development.

  1. A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in radio frequency plasmas

    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. Computer Assisted Audit Techniques and Audit Quality in Developing Countries: Evidence from Nigeria

    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.

  3. Learning Analytics: The next frontier for computer assisted language learning in big data age

    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.

  4. Hybrid neural network and statistical classification algorithms in computer-assisted diagnosis

    Stotzka, Rainer

    2000-06-01

    The development of computer assisted diagnosis systems for image-patterns is still in the early stages compared to the powerful image and object recognition capabilities of the human eye and visual cortex. Rules have to be defined and features have to be found manually in digital images to come to an automatic classification. The extraction of discriminating features is especially in medical applications a very time consuming process. The quality of the defined features influences directly the classification success. Artificial neural networks are in principle able to solve complex recognition and classification tasks, but their computational expenses restrict their use to small images. A new improved image object classification scheme consists of neural networks as feature extractors and common statistical discrimination algorithms. Applied to the recognition of different types of tumor nuclei images this system is able to find differences which are barely discernible by human eyes.

  5. Computer assisted active learning system development for critical thinking in history of civilization

    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.

  6. The Effect of Computer Assisted Instruction on Elementary Reading and Writing Achievement

    H. Gülhan ORHAN KARSAK

    2014-01-01

    Full Text Available The research investigated the effect of computer assisted instruction (CAI on elementary reading and writing achievement (ERWA. The sample consisted of 64 first graders (32 in the experimental group and 32 in the control group in the 2006-2007 academic year. This quasi-experimental study had a posttest only control group design and was conducted during the first semester. The experimental group was taught by CAI and the control group was taught by traditional instruction. Data were gathered through ‘Parent Questionnaire’, ‘Reading Concepts Scale’, ‘Achievement Test’, ‘Reading and Handwriting Observation Form’ and analyzed by chi-square, frequency and t test through SPSS 12.0. The main findings of the study were as follows: (1 CAI affected first graders’ handwriting, reading fluency and punctuation, (2 CAI didn’t affect their writing and reading comprehension, (3 CAI affected ERWA of those who did not have any computer at home.

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

    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. PMID:26235960

  8. Innovative use of computer-assisted tomography in the management of an irreducible anterior shoulder dislocation

    Rajpal S Nandra

    2011-01-01

    Full Text Available Anterior dislocation of the shoulder is a common injury which is often reduced in the emergency department, without specialist orthopedic input. We report a case of an irreducible locked anterior glenohumeral dislocation with impaction of the humeral head onto the antero-inferior glenoid rim and subsequent generation of a Hill-Sachs lesion. To our knowledge, we describe the first reported case of using computer-assisted tomography to generate a sequence of movements to safely disimpact the locked dislocation without causing further iatrogenic injury or a fracture through the humeral articular surface. This novel image-assisted closed reduction technique spared the patient from the morbidity associated with performing open reduction surgery. At 6-month follow-up, the patient reported no re-dislocations, returned to work and had excellent range of motion.

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

    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.

  10. The policy & procedure manual: development of a computer-assisted process for review.

    Crawford, N; Norris, J R; Ferguson-Paré, M L

    1993-01-01

    This article documents the successful development of a computer-assisted process for systematic review of nursing policies and procedures at The Queen Elizabeth Hospital, Toronto, Ontario. Through broad staff input, policies and procedures are research-based yet grounded in the reality of the facility's nursing practice. Client-related standards are written as measurable, realistic statements of desired client outcomes, and as such are standards for client care. Policies and procedures have been rated according to the Canadian Council on Health Facilities Accreditation criteria (client centered, high risk, high volume, problem prone, interservice, outcome-related), so that important policies are easily identified to provide focus for quality assurance activities. The review process is structured so that over the course of a year, all policies are circulated for review by all levels of nursing staff. PMID:8347653

  11. Usefulness of spatially adaptive noise reduction processing in computer-assisted diagnosis system for bone scintigraphy

    The goal of this study was to assess the diagnostic accuracy of Pixon-processed images in comparison with raw images for computer-assisted interpretation of bone scintigraphy (BONENAVI). Whole-body scans of 57 patients with prostate cancer who had undergone bone scintigraphy for suspected bone metastases were obtained approximately 3 h after intravenous injection of 740 MBq 99mTc-methylene diphosphonate. We obtained two image sets: raw images and images processed using the Pixon method. Artificial neural network (ANN) values, bone scan index (BSI), number of hotspots and regional ANN value of two images set were automatically calculated by the BONENAVI software. Areas under the receiver operator characteristic curves (AUC) were calculated in patient-based and lesion-based analyses. In ten cases with bone metastases, ANN, BSI and number of hotspots for processed images were equivalent to those in the raw images. However, in 47 cases without bone metastases, ANN, BSI and number of hotspots for processed images showed significantly lower values than those for the raw images (p < 0.05). Sensitivity, specificity and accuracy of the raw images were 90.2, 44.7 and 65.9%, and those of the processed images were 90.2, 57.4 and 72.7%, respectively. The AUC for processed images was equivalent to that for raw images. Specificity and accuracy in the detection of bone metastases showed the Pixon-processed images to have high diagnostic performance. We conclude that the precision of computer-assisted interpretation of bone scintigraphy can be enhanced by using Pixon processing. (author)

  12. Use of computer-assisted prediction of toxic effects of chemical substances

    The current revision of the European policy for the evaluation of chemicals (REACH) has lead to a controversy with regard to the need of additional animal safety testing. To avoid increases in animal testing but also to save time and resources, alternative in silico or in vitro tests for the assessment of toxic effects of chemicals are advocated. The draft of the original document issued in 29th October 2003 by the European Commission foresees the use of alternative methods but does not give further specification on which methods should be used. Computer-assisted prediction models, so-called predictive tools, besides in vitro models, will likely play an essential role in the proposed repertoire of 'alternative methods'. The current discussion has urged the Advisory Committee of the German Toxicology Society to present its position on the use of predictive tools in toxicology. Acceptable prediction models already exist for those toxicological endpoints which are based on well-understood mechanism, such as mutagenicity and skin sensitization, whereas mechanistically more complex endpoints such as acute, chronic or organ toxicities currently cannot be satisfactorily predicted. A potential strategy to assess such complex toxicities will lie in their dissection into models for the different steps or pathways leading to the final endpoint. Integration of these models should result in a higher predictivity. Despite these limitations, computer-assisted prediction tools already today play a complementary role for the assessment of chemicals for which no data is available or for which toxicological testing is impractical due to the lack of availability of sufficient compounds for testing. Furthermore, predictive tools offer support in the screening and the subsequent prioritization of compound for further toxicological testing, as expected within the scope of the European REACH program. This program will also lead to the collection of high-quality data which will broaden the

  13. CT-MR image data fusion for computer-assisted navigated surgery of orbital tumors

    Nemec, Stefan Franz [Department of Radiology/Division of Neuroradiology and Musculoskeletal Radiology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria)], E-mail: stefan.nemec@meduniwien.ac.at; Peloschek, Philipp; Schmook, Maria Theresa; Krestan, Christian Robert [Department of Radiology/Division of Neuroradiology and Musculoskeletal Radiology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria); Hauff, Wolfgang [Department of Ophthalmology, 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); Czerny, Christian [Department of Radiology/Division of Neuroradiology and Musculoskeletal Radiology, Medical University Vienna, Waehringerguertel 18-20, A-1090 Vienna (Austria)

    2010-02-15

    Purpose: To demonstrate the value of multidetector computed tomography (MDCT) and magnetic resonance imaging (MRI) in the preoperative assessment of orbital tumors, and to present, particularly, CT and MR image data fusion for surgical planning and performance in computer-assisted navigated surgery of orbital tumors. Materials and methods: In this retrospective case series, 10 patients with orbital tumors and associated complaints underwent MDCT and MRI of the orbit. MDCT was performed at high resolution, with a bone window level setting in the axial plane. MRI was performed with an axial 3D T1-weighted (w) gradient-echo (GE) contrast-enhanced sequence, in addition to a standard MRI protocol. First, MDCT and MR images were used to diagnose tumorous lesions compared to histology as a standard of reference. Then, the image data sets from CT and 3D T1-w GE sequences were merged on a workstation to create CT-MR fusion images that were used 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. Furthermore, the clinical preoperative status was compared to the patients' postoperative outcome. Results: Radiological and histological diagnosis, which revealed 7 benign and 3 malignant tumors, were concordant in 7 of 10 cases (70%). The CT-MR fusion images supported the surgeon in the preoperative planning and improved the surgical performance. The mean intraoperative accuracy of the navigation unit was 1.35 mm. Postoperatively, orbital complaints showed complete regression in 6 cases, were ameliorated notably in 3 cases, and remained unchanged in 1 case. Conclusion: CT and MRI are essential for the preoperative assessment of orbital tumors. CT-MR image data fusion is an accurate tool for planning the correct surgical procedure, and can improve surgical results in computer-assisted navigated surgery of

  14. CT-MR image data fusion for computer-assisted navigated surgery of orbital tumors

    Purpose: To demonstrate the value of multidetector computed tomography (MDCT) and magnetic resonance imaging (MRI) in the preoperative assessment of orbital tumors, and to present, particularly, CT and MR image data fusion for surgical planning and performance in computer-assisted navigated surgery of orbital tumors. Materials and methods: In this retrospective case series, 10 patients with orbital tumors and associated complaints underwent MDCT and MRI of the orbit. MDCT was performed at high resolution, with a bone window level setting in the axial plane. MRI was performed with an axial 3D T1-weighted (w) gradient-echo (GE) contrast-enhanced sequence, in addition to a standard MRI protocol. First, MDCT and MR images were used to diagnose tumorous lesions compared to histology as a standard of reference. Then, the image data sets from CT and 3D T1-w GE sequences were merged on a workstation to create CT-MR fusion images that were used 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. Furthermore, the clinical preoperative status was compared to the patients' postoperative outcome. Results: Radiological and histological diagnosis, which revealed 7 benign and 3 malignant tumors, were concordant in 7 of 10 cases (70%). The CT-MR fusion images supported the surgeon in the preoperative planning and improved the surgical performance. The mean intraoperative accuracy of the navigation unit was 1.35 mm. Postoperatively, orbital complaints showed complete regression in 6 cases, were ameliorated notably in 3 cases, and remained unchanged in 1 case. Conclusion: CT and MRI are essential for the preoperative assessment of orbital tumors. CT-MR image data fusion is an accurate tool for planning the correct surgical procedure, and can improve surgical results in computer-assisted navigated surgery of orbital

  15. The effect of computer-assisted translation on L2 learners’ mastery of writing

    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.

  16. Cosmetic and aesthetic skin photosurgery using a computer-assisted CO2 laser-scanning system

    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.

  17. EFFECTIVENESS OF COMPUTER ASSISTED INSTRUCTION ON ACADEMIC PERFORMANCE OF THE CHILDREN WITH MILD MENTAL RETARDATION AT PRIMARY LEVEL

    VAISHALI GHAYWAN AND RAJU GOVIND ARAKH

    2012-11-01

    Full Text Available There have been a lot of changes in the educational pattern for the last two decades . Special Education conveys that there is a need to use innovative methods in teaching children with disabilities ,In this scientific era computer has a vital role in the teaching learning process. The present study titled “Effectiveness of Computer Assisted Instruction (CAI on the Academic Performance of Children with Mild Mental Retardation at Primary Level ” investigated the effects of computer assisted instruction on the academic performance of the children with mental retardation . Sample size consisted of 5 students (N=5 with mild mental retardation placed in primary level at Save the Children Special Education Centre, Bandra-Kurla Complex, Mumbai . Quasi experimental research approach with one group time series design was used. Functional Assessment checklist for programming (FACP was used for the selection of the Samples . Computer Assisted Instruction (CAI package developed by researcher was used for intervention.

  18. Focus on Methodology: Beyond paper and pencil: Conducting computer-assisted data collection with adolescents in group settings.

    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. PMID:26950018

  19. Pedicle screw placement in the thoracic spine: a randomized comparison study of computer-assisted navigation and conventional techniques

    WU Han; GAO Zhong-li; WANG Jin-cheng; LI Ying-pu; XIA Peng; JIANG Rui

    2010-01-01

    Objective: To evaluate the accuracy of computer-assisted pedicle screw installation and its clinical benefit as compared with conventional pedicle screw installation techniques. Methods: Total 176 thoracic pedicle screws placed in 42 thoracic fracture patients were involved in the study randomly, 20 patients under conventional fluoroscopic control (84 screws) and 22 patients had screw insertion under three dimensional (3D) computer-assisted navigation (92 screws). The 2 groups were compared for accuracy of screw placement, time for screw insertion by postoperative thincut CT scans and statistical analysis by x2 test. The cortical perforations were then graded by 2-mm increments: Grade Ⅰ (good, no cortical perforation), Grade Ⅱ (screw outside the pedicle 2 mm).Results: In computer assisted group, 88 (95.65%) were Grade Ⅰ (good), 4 (4.35%) were Grade Ⅱ (2 mm) violations. In conventional group, there were 14 cortical violations (16.67%), 70 (83.33%) were Grade Ⅰ (good),11 (13.1%) were Grade Ⅱ (2 mm) violations (P<0.001). The number (19.57%) of upper thoracic pedicle screws ( T1-T4 ) inserted under 3D computer-assisted navigation was significantly higher than that (3.57%) by conventional fluoroscopic control (P<0.001).Average screw insertion time in conventional group was (4.56 ±1.03) min and (2.54 ± 0.63) min in computer assisted group (P<0.001). In the conventional group, one patient had pleura injury and one had a minor dura violation.Conclusions: This study provides further evidence that 3D computer-assisted navigation placement of pedicle screws can increase accuracy, reduce surgical time, and be performed safely and effectively at all levels of the thoracic spine, particularly upper thoracic spine.

  20. Oral administration of a select mixture of Bacillus probiotics generates Tr1 cells in weaned F4ab/acR pigs challenged with an F4+ ETEC/VTEC/EPEC strain

    Zhou, Dong; Zhang, Wei; Wang, Meng-Ling;

    2015-01-01

    ) − positive ETEC/VTEC/EPEC challenge. Administration of BLS-mix increased the percentage of Foxp3−IL-10+ T cells but not of Foxp3+IL-10+ regulatory T (Treg) cells among peripheral blood CD4+ T cells. A low dose of BLS-mix feeding resulted in increased the expression of IL-6, TNF-α, IL-10, and the...... transcription factors Foxp3 and T-bet mRNAs in the jejunum. Administration of either a low or high dose BLS-mix also led to an increase in the percentage of CD4+Foxp3+ Treg cells among intraepithelial lymphocytes and CD4+IL-10+ T cells in the small intestinal Peyer’s patches and the lamina propria of F4ab....../acR− pigs following F4+ ETEC/VTEC/EPEC challenge. The increased number of IL-10–producing CD4+ T cells was attributed to an increase in the proportion of Foxp3−IL-10+ Treg cells rather than Foxp3+IL-10+ Treg cells. Our data indicate that oral administration of BLS-mix to newly weaned F4ab/acR− pigs...

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

    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…

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

    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)…

  3. Validating a Computer-Assisted Language Learning Attitude Instrument Used in Iranian EFL Context: An Evidence-Based Approach

    Aryadoust, Vahid; Mehran, Parisa; Alizadeh, Mehrasa

    2016-01-01

    A few computer-assisted language learning (CALL) instruments have been developed in Iran to measure EFL (English as a foreign language) learners' attitude toward CALL. However, these instruments have no solid validity argument and accordingly would be unable to provide a reliable measurement of attitude. The present study aimed to develop a CALL…

  4. Application of Adaptive Decision Aiding Systems to Computer-Assisted Instruction. Final Report, January-December 1974.

    May, Donald M.; And Others

    The minicomputer-based Computerized Diagnostic and Decision Training (CDDT) system described combines the principles of artificial intelligence, decision theory, and adaptive computer assisted instruction for training in electronic troubleshooting. The system incorporates an adaptive computer program which learns the student's diagnostic and…

  5. Effectiveness of Computer-Assisted Instruction on Enhancing the Classification Skill in Second-Graders at Risk for Learning Disabilities

    Mohammed, Adel Abdulla; Kanpolat, Yavuz Erhan

    2010-01-01

    Introduction: Computers and other technological instruments in general have become a more common practice in our schools nowadays, and Computer-assisted instruction (CAI) has been recently provided in various formats from kindergartens on. It can help children at-risk for learning disabilities. Method: This study investigated the effectiveness of…

  6. Effect on Reading Fluency of Struggling Third Grade Students: Computer-Assisted Intervention versus Teacher-Guided Intervention

    Martin, Corey; Elfreth, Jaime; Feng, Jay

    2014-01-01

    This research study examined two intervention programs, Read Naturally (computer-assisted) and The Six-Minute Solution (teacher-guided), for the purpose of finding their effects on reading fluency with 3rd grade students at an elementary school. The participants were from two separate third grade classrooms, randomly assigned to one of the two…

  7. Audio computer assisted self interview and face to face interview modes in assessing response bias among STD clinic patients

    Ghanem, K; Hutton, H; Zenilman, J; Zimba, R; Erbelding, E

    2005-01-01

    Background: Audio computer assisted self interview (ACASI) may minimise social desirability bias in the ascertainment of sensitive behaviours. The aim of this study was to describe the difference in reporting risk behaviour in ACASI compared to a face to face interview (FFI) among public sexually transmitted diseases (STD) clinic attendees.

  8. The Predictive Validity of a Computer-Assisted Career Decision-Making System: A Six-Year Follow-Up

    Gati, Itamar; Gadassi, Reuma; Shemesh, Naama

    2006-01-01

    The present study tested the predictive validity of "Making Better Career Decisions" ("MBCD"), a computer-assisted career decision-making system. Seventy clients who had used "MBCD" six years earlier were interviewed by telephone about their present field of study or occupation and the degree of their satisfaction with their occupational choice.…

  9. Technical Problems in Implementing University-Level Computer-Assisted Instruction in Mathematics and Science: Second Annual Report.

    Levine, Arvin; And Others

    Difficulties in implementing the EXCHECK/Voice Oriented Curriculum Author Language (VOCAL) System, a general program designed for university-level computer-assisted instruction in mathematics and science written in the VOCAL language, are presented in terms of informal mathematical procedures, audio and prosodic features, and a schedule of…

  10. The Computer-Assisted Hypnosis Scale: Standardization and Norming of a Computer-Administered Measure of Hypnotic Ability.

    Grant, Carolyn D.; Nash, Michael R.

    1995-01-01

    In a counterbalanced, within subjects, repeated measures design, 130 undergraduates were administered the Computer-Assisted Hypnosis Scale (CAHS) and the Stanford Hypnotic Susceptibility Scale and were hypnotized. The CAHS was shown to be a psychometrically sound instrument for measuring hypnotic ability. (SLD)

  11. Computer-assisted detection of pulmonary embolism : evaluation of pulmonary CT angiograms performed in an on-call setting

    Wittenberg, Rianne; Peters, Joost F.; Sonnemans, Jeroen J.; Prokop, Mathias; Schaefer-Prokop, Cornelia M.

    2010-01-01

    The purpose of the study was to assess the stand-alone performance of computer-assisted detection (CAD) for evaluation of pulmonary CT angiograms (CTPA) performed in an on-call setting. In this institutional review board-approved study, we retrospectively included 292 consecutive CTPA performed duri

  12. Using Computer Assisted Biofeedback to Help Children with Attention-Deficit Hyperactivity Disorder to Gain Self-Control.

    Blanton, Judy; Johnson, Lawrence J.

    1991-01-01

    This study evaluated effects of computer-assisted biofeedback on the electromyographic activity of three students (grades four and six) with attention deficit hyperactivity disorder. Results indicated increased relaxation abilities and, in the case of the one student also observed in the classroom, increased on-task behavior after the biofeedback…

  13. Computer-Assisted Guidance in New York City High Schools: A Demonstration of Feasibility and Impact on Students.

    Heller, Barbara R.; Chitayat, Linda

    This report covers three time periods during which students in five New York City high schools had use of a Computer Assisted Guidance (CAG) system. The basic objectives of the CAG project were to demonstrate the feasibility of using an automated system to provide high school students with factual and current information on colleges and careers,…

  14. On Using Intelligent Computer-Assisted Language Learning in Real-Life Foreign Language Teaching and Learning

    Amaral, Luiz A.; Meurers, Detmar

    2011-01-01

    This paper explores the motivation and prerequisites for successful integration of Intelligent Computer-Assisted Language Learning (ICALL) tools into current foreign language teaching and learning (FLTL) practice. We focus on two aspects, which we argue to be important for effective ICALL system development and use: (i) the relationship between…

  15. Computer-assisted instruction: guiding learning through a key features approach in a community-based medical course.

    Sturmberg, J P; Crowe, P; Hughes, C

    2003-05-01

    Computer assisted instruction (CAI) offers a valuable adjunct to the difficulties encountered in teaching medical students in a community-based course in rural Australia. The paper outlines the educational planning processes behind the project and provide an outline of the modular solution to the task. Preliminary results show that this approach is feasible and acceptable to guide students' learning. PMID:12881062

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

    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…

  17. At Their Own Pace: Interim Findings from an Evaluation of a Computer-Assisted, Modular Approach to Developmental Math

    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…

  18. Selected Elementary and Secondary Resources in English and Foreign Languages for Computer-Assisted Instruction. CLEAR Annotated Bibliography Series.

    Center for Applied Linguistics, Washington, DC. Center for Language Education and Research.

    This 30-item annotated bibliography is composed of resource materials for using computer-assisted instructional materials to teach English as a Second Language (ESL) and foreign languages at the elementary, secondary, and postsecondary levels. For each of the entries, the following information is indicated: target language educational level,…

  19. Accuracy of treatment planning based on stereolithography in computer assisted surgery

    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

  20. A comparative analysis of multi-level computer-assisted decision making systems for traumatic injuries

    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

  1. CT-MR image data fusion for computer assisted navigated neurosurgery of temporal bone tumors

    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

  2. CT-MR image data fusion for computer assisted navigated neurosurgery of temporal bone tumors

    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

  3. Computer-assisted photo identification outperforms visible implant elastomers in an endangered salamander, Eurycea tonkawae.

    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. Does Computer-Assisted Femur First THR Improve Musculoskeletal Loading Conditions?

    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.

  5. Assessment of medical imaging and computer-assist systems: lessons from recent experience.

    Wagner, Robert F; Beiden, Sergey V; Campbell, Gregory; Metz, Charles E; Sacks, William M

    2002-11-01

    In the last 2 decades major advances have been made in the field of assessment methods for medical imaging and computer-assist systems through the use of the paradigm of the receiver operating characteristic (ROC) curve. In the most recent decade this methodology was extended to embrace the complication of reader variability through advances in the multiple-reader, multiple-case (MRMC) ROC measurement and analysis paradigm. Although this approach has been widely adopted by the imaging research community, some investigators appear averse to it, possibly from concern that it could place a greater burden on the scarce resources of patient cases and readers compared to the requirements of alternative methods. The present communication argues, however, that the MRMC ROC approach to assessment in the context of reader variability may be the most resource-efficient approach available. Moreover, alternative approaches may also be statistically uninterpretable with regard to estimated summary measures of performance and their uncertainties. The authors propose that the MRMC ROC approach be considered even more widely by the larger community with responsibilities for the introduction and dissemination of medical imaging technologies to society. General principles of study design are reviewed, and important contemporary clinical trials are used as examples. PMID:12449359

  6. Effectiveness of a computer assisted learning (CAL package to raise awareness of autism

    diMambro Benedict

    2009-02-01

    Full Text Available Abstract Background Promoting awareness of autism in populations who work with children may result in an earlier diagnosis of the condition. In this study, a computer assisted learning (CAL package, containing educationally appropriate knowledge about autism was developed; and the effectiveness of this CAL package was evaluated. Methods The CAL package was developed using computer software, "Xerte" and "Flash Macromedia". The effectiveness of the CAL package was evaluated in 32 childcare students in the UK, who were randomised to watch the CAL package or to read the information leaflet containing the same information (n = 16 in each group. Retention performance, level of enjoyment, and level of confidence to identify a child with autism, after the interventions, were evaluated. The data obtained from two studied groups was analysed using unpaired Student's t-test, 95% confidence interval, and effect size. Results Students who watched the CAL package had superior retention performance percentage scores (p = 0.02, 95% CI = 0.83–12.19, effect size = 0.8 and level of enjoyment (p = 0.04, 95% CI = 0.03–2.75, effect size = 0.7 compared with students who read the information leaflet. However, there was no significant difference in level of confidence to identify a child with autism (p = 0.39, 95% CI = -1.80–0.72, effect size = -0.3. Conclusion The CAL package developed was an effective method of educating people who work with children about autism.

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

    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.

  8. Computer-assisted static/dynamic renal imaging: a screening test for renovascular hypertension

    Computer-assisted static/dynamic renal imaging with [197Hg] chlormerodrin and [/sup 99m/Tc] pertechnetate was evaluated prospectively as a screening test for renovascular hypertension. Results are reported for 51 patients: 33 with benign essential hypertension and 18 with renovascular hypertension, and for 21 normal controls. All patients underwent renal arteriography. Patients with significant obesity, renal insufficiency, or renoparenchymal disease were excluded from this study. Independent visual analyses of renal gamma images and time-activity transit curves identified 17 of the 18 patients with renovascular hypertension; one study was equivocal. There were five equivocal and three false-positive results in the essential hypertension and normal control groups. The sensitivity of the method was 94% and the specificity 85%. Since the prevalence of the renovascular subset of hypertension is approximately 5%, the predictive value is only 25%. Inclusion of computer-generated data did not improve this result. Accordingly, this method is not recommended as a primary screening test for renovascular hypertension

  9. Sensitivity and specificity of computer-assisted breast cancer detection in mammography screening

    Purpose: To evaluate a system of computer-assisted diagnosis (CAD) in mammography. Material and Methods: A sample of 120 sets of two-view mammograms was examined by an expert screener, a screening radiologist, a clinical radiologist, and a CAD system. The screening and clinical radiologists examined the mammograms twice, first without and then with the help of CAD. The sample consisted of first-round screening films from a two-round population-based screening, and comprised: 32 women in whom breast cancer was detected at the first screening; 10 with cancer detected during the screening interval; 32 with cancer detected at the second screening; and 46 with normal mammograms at both screenings. Results: The expert screener, the screening radiologist, the clinical radiologist, and the CAD system detected respectively 44, 41, 34 and 37 cancers. Their respective specificities were 80%, 83%, 100% and 22%. With the help of CAD, the screening radiologist detected 1 additional cancer and the clinical radiologist detected 3; their respective specificities were 80% and 100%. Conclusion: The sensitivity of the CAD system was satisfactory. The two radiologists helped by CAD achieved a modest increase in sensitivity with unaffected specificity. However, the CAD system by itself had a very low specificity and it needs improvement before it can be useful in mammographic screening. (orig.)

  10. A wireless body area network of intelligent motion sensors for computer assisted physical rehabilitation

    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.

  11. A wireless body area network of intelligent motion sensors for computer assisted physical rehabilitation.

    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. PMID:15740621

  12. Comprehensive automatic assessment of retinal vascular abnormalities for computer-assisted retinopathy grading.

    Joshi, Vinayak; Agurto, Carla; VanNess, Richard; Nemeth, Sheila; Soliz, Peter; Barriga, Simon

    2014-01-01

    One of the most important signs of systemic disease that presents on the retina is vascular abnormalities such as in hypertensive retinopathy. Manual analysis of fundus images by human readers is qualitative and lacks in accuracy, consistency and repeatability. Present semi-automatic methods for vascular evaluation are reported to increase accuracy and reduce reader variability, but require extensive reader interaction; thus limiting the software-aided efficiency. Automation thus holds a twofold promise. First, decrease variability while increasing accuracy, and second, increasing the efficiency. In this paper we propose fully automated software as a second reader system for comprehensive assessment of retinal vasculature; which aids the readers in the quantitative characterization of vessel abnormalities in fundus images. This system provides the reader with objective measures of vascular morphology such as tortuosity, branching angles, as well as highlights of areas with abnormalities such as artery-venous nicking, copper and silver wiring, and retinal emboli; in order for the reader to make a final screening decision. To test the efficacy of our system, we evaluated the change in performance of a newly certified retinal reader when grading a set of 40 color fundus images with and without the assistance of the software. The results demonstrated an improvement in reader's performance with the software assistance, in terms of accuracy of detection of vessel abnormalities, determination of retinopathy, and reading time. This system enables the reader in making computer-assisted vasculature assessment with high accuracy and consistency, at a reduced reading time. PMID:25571442

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

    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.

  14. Computer-assisted multi-segment gradient optimization in ion chromatography.

    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. PMID:25596760

  15. User Acceptance Test of Computer-Assisted Problem-Based Learning Assessment Tool (CAPBLAT

    Muhammad Qomaruddin

    2014-02-01

    Full Text Available Problem-based Learning (PBL is an instructional design method that is used by many lecturers to create more efficient and meaningful learning experiences. PBL emphasizes the lecturer in facilitating in collaborative learning. They conventionally play a little role in the formal assessment process. Peer-assessment and self-assessment are the most frequent methods of assessment employed by the lecturers in conducting PBL approach. This paper presents acceptance testing of a computer-based tool for peer-assessment and self-assessment in PBL approach, which called Computer-Assisted Problem-Based Learning Assessment Tool (CAPBLAT. The tool was designed to assist a lecturer in conducting PBL teaching method and assess students learning progress. Two PBL classes participated in the testing of the tool. During the study, questionnaires were administered to students. The results concerning the assessment tool acceptance demonstrate that using CAPBLAT in the PBL assessment process received better acceptance from both the students and lecturers.

  16. [Georg Schlöndorff-the father of computer-assisted surgery].

    Mösges, R

    2016-09-01

    Georg Schlöndorff (1931-2011) developed the idea of computer-assisted surgery (CAS) during his time as professor and chairman of the Department of Otorhinolaryngology at the Medical Faculty of the University of Aachen, Germany. In close cooperation with engineers and physicists, he succeeded in translating this concept into a functional prototype that was applied in live surgery in the operating theatre. The first intervention performed with this image-guided navigation system was a skull base surgical procedure 1987. During the following years, this concept was extended to orbital surgery, neurosurgery, mid-facial traumatology, and brachytherapy of solid tumors in the head and neck region. Further technical developments of this first prototype included touchless optical positioning and the computer vision concept with three orthogonal images, which is still common in contemporary navigation systems. During his time as emeritus professor from 1996, Georg Schlöndorff further pursued his concept of CAS by developing technical innovations such as computational fluid dynamics (CFD). PMID:27534760

  17. [A new concept in digestive surgery: the computer assisted surgical procedure, from virtual reality to telemanipulation].

    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. PMID:9554121

  18. A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in radio frequency plasmas

    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.

  19. Development of computer assisted learning program using cone beam projection for head radiography

    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. (author)

  20. A remote sensing computer-assisted learning tool developed using the unified modeling language

    Friedrich, J.; Karslioglu, M. O.

    The goal of this work has been to create an easy-to-use and simple-to-make learning tool for remote sensing at an introductory level. Many students struggle to comprehend what seems to be a very basic knowledge of digital images, image processing and image arithmetic, for example. Because professional programs are generally too complex and overwhelming for beginners and often not tailored to the specific needs of a course regarding functionality, a computer-assisted learning (CAL) program was developed based on the unified modeling language (UML), the present standard for object-oriented (OO) system development. A major advantage of this approach is an easier transition from modeling to coding of such an application, if modern UML tools are being used. After introducing the constructed UML model, its implementation is briefly described followed by a series of learning exercises. They illustrate how the resulting CAL tool supports students taking an introductory course in remote sensing at the author's institution.

  1. Clinical relevance of model based computer-assisted diagnosis and therapy

    Schenk, Andrea; Zidowitz, Stephan; Bourquain, Holger; Hindennach, Milo; Hansen, Christian; Hahn, Horst K.; Peitgen, Heinz-Otto

    2008-03-01

    The ability to acquire and store radiological images digitally has made this data available to mathematical and scientific methods. With the step from subjective interpretation to reproducible measurements and knowledge, it is also possible to develop and apply models that give additional information which is not directly visible in the data. In this context, it is important to know the characteristics and limitations of each model. Four characteristics assure the clinical relevance of models for computer-assisted diagnosis and therapy: ability of patient individual adaptation, treatment of errors and uncertainty, dynamic behavior, and in-depth evaluation. We demonstrate the development and clinical application of a model in the context of liver surgery. Here, a model for intrahepatic vascular structures is combined with individual, but in the degree of vascular details limited anatomical information from radiological images. As a result, the model allows for a dedicated risk analysis and preoperative planning of oncologic resections as well as for living donor liver transplantations. The clinical relevance of the method was approved in several evaluation studies of our medical partners and more than 2900 complex surgical cases have been analyzed since 2002.

  2. Computer-assisted spatial reconstruction of cerebral blood vessels and intracranial aneurysms

    Nikolić Igor M.

    2006-01-01

    Full Text Available Introduction. Today, many medical procedures are based on image analysis with the aim of providing accurate diagnosis and optimal treatment. The goal of this report was to present clinical implications of computer-assisted geometric design of carotid aneurysms. Material and methods. In this study, the three-dimensional reconstruction was based on the approximation power of the parametric spline function, which achieves interpolation and surface fitting of the arterial information obtained by conventional angiography. Two views of conventional angiograms (anterioposterior and lateral views were used with a personal computer and commercial software. Results. This method of three-dimensional generated images was applied in 45 cases of cerebral aneurysms in carotid bifurcation. 3D reconstructions were made in approximately 20 minutes. They contributed to assessing vascular structures, and it was possible to rotate the three-dimensional image in different angles. Conclusion. Three-dimensional reconstruction of cerebral vessels is very useful for discussing surgical strategies preoperatively. Furthermore, it could also be used in endovascular procedures. .

  3. Splint deformation measurement: a contribution to quality control in computer assisted surgery

    Weber, Christoph; Figl, Michael; Schicho, Kurt

    2010-02-01

    Setting up a reliable and accurate reference coordinate system is a crucial part in computer assisted navigated surgery. As the use of splints is a well established technique for this purpose and any change in its geometry directly influences the accuracy of the navigation, a regular monitoring of such deformations should occur as a means of quality control. This work presents a method to quantify such deformations based on computed tomography images of a splint equipped with fiducial markers. Point-to-point registration is used to match the two data sets and some markers near to the navigation field are used to estimate the registration error. The Hausdorff Distance, describing the maximum of all minimal distances between two point sets in general, is applied to the surfaces of the models, being a measure for the overall change in geometry. Finally this method for quantification is demonstrated using a computed tomography data set of such a splint together with an artificially modified one, being an initial step to a study examining the influence of the Sterrad sterilisation system on acrylic splints.

  4. Effects of Computer-Assisted STAD, LTM and ICI Cooperative Learning Strategies on Nigerian Secondary School Students' Achievement, Gender and Motivation in Physics

    Gambrari, Isiaka Amosa; 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 Model (LTM) cooperative learning strategies on Nigerian secondary students' achievement and motivation in physics. The efficacy of Authors developed computer assisted instructional package (CAI) for teaching…

  5. Effects of Computer-Assisted STAD, LTM and ICI Cooperative Learning Strategies on Nigerian Secondary School Students' Achievement, Gender and Motivation in Physics

    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…

  6. Computer-assisted lip diagnosis on traditional Chinese medicine using multi-class support vector machines

    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

  7. Endoscopic anterior cruciate ligament reconstruction using a computer-assisted fluoroscopic navigation system

    During anterior cruciate ligament (ACL) reconstruction, placement of the reconstructed ligament affects the clinical results. To accomplish accurate and reproducible placement of the tibial bone tunnel, we employed a fluoroscopic navigation system for endoscopic ACL reconstruction. In this study, preciseness of the tibial tunnel placement was evaluated, and the advantages and disadvantages of this navigation system for endoscopic ACL reconstruction are discussed. Altogether, 16 knees of 16 patients who had undergone ACL reconstruction using this system (navi group) were evaluated regarding the positioning of the tibial tunnel against Blumensaat's line using X-p and the route of the graft by magnetic resonance imaging (MRI). Another 16 knees of 16 patients who underwent endoscopic ACL reconstruction without the navigation system were the controls (control group). At the 1-year follow-up, maximally extended lateral knee X-p revealed that the anterior edge of the tibial tunnel and Blumensaat's line were almost aligned and that roof impingement was avoided; the T2-weighted MR images showed that the graft was placed close to and parallel to the inter-condylar roof in all the knees of the navi group. The ratio of the distance between Blumensaat's line and the anterior edge of the tibial tunnel at the level of the tibial plateau to the anteroposterior width in fully extended true lateral radiographs was 2.7%±3.4% in the navi group and 8.4%±7.4% in the control group. The computer-assisted fluoroscopic navigation system improves accuracy and decreases dispersion of the tibial tunnel placement against Blumensaat's line in single-bundle ACL reconstruction. This innovative device renders the reconstruction procedure more reliable, eliminating the problem of skeletal variation among patients. However, the function of this navigation system for femoral tunnel placement is insufficient at present. Further refinement of the system is necessary, and the method of application

  8. The current status and future prospects of computer-assisted hip surgery.

    Inaba, Yutaka; Kobayashi, Naomi; Ike, Hiroyuki; Kubota, So; Saito, Tomoyuki

    2016-03-01

    The advances in computer assistance technology have allowed detailed three-dimensional preoperative planning and simulation of preoperative plans. The use of a navigation system as an intraoperative assistance tool allows more accurate execution of the preoperative plan, compared to manual operation without assistance of the navigation system. In total hip arthroplasty using CT-based navigation, three-dimensional preoperative planning with computer software allows the surgeon to determine the optimal angle of implant placement at which implant impingement is unlikely to occur in the range of hip joint motion necessary for daily activities of living, and to determine the amount of three-dimensional correction for leg length and offset. With the use of computer navigation for intraoperative assistance, the preoperative plan can be precisely executed. In hip osteotomy using CT-based navigation, the navigation allows three-dimensional preoperative planning, intraoperative confirmation of osteotomy sites, safe performance of osteotomy even under poor visual conditions, and a reduction in exposure doses from intraoperative fluoroscopy. Positions of the tips of chisels can be displayed on the computer monitor during surgery in real time, and staff other than the operator can also be aware of the progress of surgery. Thus, computer navigation also has an educational value. On the other hand, its limitations include the need for placement of trackers, increased radiation exposure from preoperative CT scans, and prolonged operative time. Moreover, because the position of a bone fragment cannot be traced after osteotomy, methods to find its precise position after its movement need to be developed. Despite the need to develop methods for the postoperative evaluation of accuracy for osteotomy, further application and development of these systems are expected in the future. PMID:26850921

  9. [Computer-assisted validation system applied to hematology: Valab-hemato].

    Corberand, J X; Rogari, E; Laharrague, P; Fillola, G; Valdiguié, P

    1994-01-01

    Validation of laboratory reports is the ultimate step before transmission of results to the clinician. The biologist checks the intrinsic consistency of the data as well as their possible medical value that is liable to lead to other investigations. Such a policy, when performed on all the data, is time-consuming, boring and uncertain. This step may be simplified by the use of a computerized expert system. The computer assisted validation system presented here concerns routine haematology data (Valab-haemato). Like its predecessor devoted to clinical chemistry (Valab-Biochem) it is based on the performance of a powerful inference engine which generates a decision-making tree for each report according to the data. This adaptability gives the system a capacity very close to human reasoning. In its haematology version the system deals with many variables including sex, age, origin of the patient (hospital ward), and the haematological data (blood cell count, differential, reticulocyte count, various information drawn from microscope examination of the blood smear as well as any report concerning the blood sample, erythrocyte sedimentation rate). Previous data are also taken into account, as well as the normal ranges, the values beyond which no result can be automatically validated and the delta-check. Some information definitely prevents validation of the results, others can be validated if they have been previously approved. Whereas the method of reasoning is fixed, all items are changeable in order to adapt the system to the type of activity of the laboratory.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:7856947

  10. Computer assisted optimization of liquid chromatographic separations of small molecules using mixed-mode stationary phases.

    Ordoñez, Edgar Y; Benito Quintana, José; Rodil, Rosario; Cela, Rafael

    2012-05-18

    Mixed-mode stationary phases are gaining adepts in liquid chromatography (LC) as more and more applications are published and new commercial columns appear in the market ought to their ability to retain and separate analytes with multiple functionalities. The increased number of adjustable variables gives these columns an enhanced value for the chromatographer, but, on the other hand, it complicates the process of developing satisfactory separations when complex samples must be analyzed. Thus, the availability of computer assisted methods development (CAMD) tools is highly desirable in this field. Therefore, the first specific tool for the CAMD of LC separations in mixed-mode columns is presented. The tool consists in two processes. The first one develops a retention model for peaks in a predefined experimental domain of pH and buffer concentration. In this domain, the retention as a function of the proportion of organic modifier is modeled using a two-stage re-calibration process departing from isocratic retention data and then, from gradient elutions. With this two-stage approach, reliability is gained. In the second process, the model is finally interpolated and used for the unattended optimization of the different possible elution modes available in these columns. This optimization process is driven by an evolutionary algorithm. The development and application of this new chemometrics tool is demonstrated by the optimization of a mixture of neutral and ionizable compounds. Hence, several different types of gradients were generated, showing a good agreement between simulated and experimental data, with retention time errors lower than 5% in most cases. On the other hand, classical CAMD tools, such as design of experiments, were unable to efficiently deal with mixed-mode optimizations, rendering errors above 30% for several compounds. PMID:22494641

  11. Collocational Relations in Japanese Language Textbooks and Computer-Assisted Language Learning Resources

    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.-----V tem članku raziskujemo prisotnost kolokacijskih odnosov v sistemih za računalniško podprto učenje in drugih jezikovnih virov za japonski jezik, na eni strani, in v materialih za učenje japonskega jezika za tujce, na drugi strani. Najprej predstavimo pomembnost učenja kolokacij v učenju tujega jezika, na kar preučimo njihov obseg v različnih virih za japonski jezik. Še posebej se osredotočimo na nekaj besednih zvez na začetniški ravni in pokažemo, kako so obravnavani v vsakem od virov. Posebna pozornost je namenjena nepredvidljivosti kolokacij, ki je povezana z večjim bremenom pri učenju tujih jezikov kot je to v primeru kolokacij, ki so učencem predvidljivi.  

  12. Setting and Reaching Targets with Computer-Assisted Cochlear Implant Fitting

    Bart Vaerenberg

    2014-01-01

    Full Text Available Objective. The paper aims to demonstrate the feasibility of defining a substantial set of psychoacoustic outcome measures with preset targets and to adopt a systematic methodology for reaching these targets in a large group of subjects, by more than one clinical centre. Design. Retrospective data analysis. Setting. Multicentre with 14 participating centres. Patients. 255 adults and children using the Advanced Bionics HiRes90k cochlear implant. Intervention. Target driven fitting with the fitting to outcomes expert (FOX system. Main Outcome Measures. For each patient, 66 measurable psychoacoustical outcomes were recorded several times after cochlear implantation: free field audiometry (6 measures and speech audiometry (4, spectral discrimination (20, and loudness growth (36, defined from the A§E test battery. These outcomes were reduced to 22 summary variables. The initial results were compared with the latest results. Results. The state of the fitting process could be well monitored by means of the measured variables. The use of the FOX computer assisted CI-programming significantly improved the proportion of the 22 variables on target. When recipients used the automated MAPs provided at switch-on, more than half (57% of the 22 targets were already achieved before any further optimisation took place. Once the FOX system was applied there was a significant 24% (P<0.001 increase in the number of targets achieved. Conclusions. This study demonstrates that it is feasible to set targets and to report on the effectiveness of a fitting strategy in terms of these targets. FOX provides an effective tool for achieving a systematic approach to programming, allowing for better optimisation of recipients' MAPs. The setting of well-defined outcome targets allowed a range of different centres to successfully apply a systematic methodology to monitoring the quality of the programming provided.

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

    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. PMID:25432976

  14. Computer-assisted targeted therapy (CATT) for prostate radiotherapy planning by fusion of CT and MRI

    Chappelow, Jonathan; Both, Stefan; Viswanath, Satish; Hahn, Stephen; Feldman, Michael; Rosen, Mark; Tomaszewski, John; Vapiwala, Neha; Patel, Pratik; Madabhushi, Anant

    2010-02-01

    In this paper, we present a comprehensive, quantitative imaging framework for improved treatment of prostate cancer via computer-assisted targeted therapy (CATT) to facilitate radiotherapy dose escalation to regions with a high likelihood of disease presence. The framework involves identification of high likelihood prostate cancer regions using computer-aided detection (CAD) classifier on diagnostic MRI, followed by mapping of these regions from MRI onto planning computerized tomography (CT) via image registration. Treatment of prostate cancer by targeted radiotherapy requires CT to formulate a dose plan. While accurate delineation of the prostate and cancer can provide reduced exposure of benign tissue to radiation, as well as a higher dose to the cancer, CT is ineffective in localizing intraprostatic lesions and poor for highlighting the prostate boundary. MR imagery on the other hand allows for greatly improved visualization of the prostate. Further, several studies have demonstrated the utility of CAD for identifying the location of tumors on in vivo multi-functional prostate MRI. Consequently, our objective is to improve the accuracy of radiotherapy dose plans via multimodal fusion of MR and CT. To achieve this objective, the CATT framework presented in this paper comprises the following components: (1) an unsupervised pixel-wise classifier to identify suspicious regions within the prostate on diagnostic MRI, (2) elastic image registration to align corresponding diagnostic MRI, planning MRI, and CT of the prostate, (3) mapping of the suspect regions from diagnostic MRI onto CT, and (4) calculation of a modified radiotherapy plan with escalated dose for cancer. Qualitative comparison of the dose plans (with and without CAD) over a total of 79 2D slices obtained from 10 MR-CT patient studies, suggest that our CATT framework could help in improved targeted treatment of prostate cancer.

  15. First experiences with computer-assisted frameless stereotactic interstitial brachytherapy (CASIB)

    Purpose: To reach an optimal treatment result and to avoid damage to critical structures a homogenous dose distribution in the tumor volume with a rapid decreasing dose to the surrounding structures is necessary. Fractionated interstitial brachytherapy of tumors in the ENT region employing needles depends on exact localization of the target volume during all fractions. Therefore reproducibility of positioning of the needle(s) plays an important role. Material and Methods: We used the ISG Viewing Wand system in combination with the Vogele-Bale-Hohner (VBH) head holder and a new targeting device. Point of entrance, pathway, and target point of the needle were planned and insertion of the needle simulated in advance. To date we have treated 7 patients with inoperable tumors in the ENT region. The actual position of the needle in the control CT was compared to the planned position. Results: The accuracy of positioning of the needle depended on the location of the tumor. In a patient with a recurrent retroorbital adenocarcinoma the mean accuracy was 1 mm. Due to soft tissue displacement in the neck region and the resulting necessity to readjust the targeting device the needle was placed with a mean deviation of 15 mm between the planned and the actual position. Conclusions: Computer-assisted frameless stereotactic interstitial brachytherapy allows for precise, reproducible and preplanned insertion of hollow needles into target structures closely adherent to the surrounding tissue, thus avoiding damage of neighbouring structures. This technique is of great advantage in treating deeply seated tumors which are fixed to bony structures, especially at the skull base. Inaccuracy in the neck region caused by soft tissue shift requires improvement of the immobilization in this region. (orig.)

  16. Virtual colonoscopy: effect of computer-assisted detection (CAD) on radiographer performance

    Burling, D. [St Mark' s Hospital, Harrow, Middlesex (United Kingdom)], E-mail: burlingdavid@yahoo.co.uk; Moore, A.; Marshall, M.; Weldon, J.; Gillen, C.; Baldwin, R.; Smith, K.; Pickhardt, P.; Honeyfield, L.; Taylor, S. [St Mark' s Hospital, Harrow, Middlesex (United Kingdom)

    2008-05-15

    Aim: To investigate the effect of a virtual colonoscopy (VC) computed-assisted detection (CAD) system on polyp detection by trained radiographers. Materials and methods: Four radiographers trained in VC interpretation and utilization of CAD systems read a total of 62 endoscopically validated VC examinations containing 150 polyps (size range 5-50 mm) in four sessions, recording any polyps found and the examination interpretation time, first without and then with the addition of CAD as a 'second reader'. After a temporal separation of 6 weeks to reduce recall bias, VC examinations were re-read using 'concurrent reader' CAD. Interpretation times, polyp detection, and number of false-positives were compared between the different reader paradigms using paired t and paired exact tests. Results: Overall, use of 'second reader' CAD significantly improved polyp detection by 12% (p < 0.001, CI 6%,17%)) from 48 to 60%. There was no significant improvement using CAD as a concurrent reader (p = 0.20; difference of 7%, CI -3%, 16%) and no significant overall difference in recorded false-positives with second reader or concurrent CAD paradigms compared with unassisted reading (p = 0.25 and 0.65, respectively). The mean interpretation time was 21.7 min for unassisted reading, 29.6 (p < 0.001) min for second reader and 19.1 min (p = 0.12) for concurrent reading paradigms. Conclusion: CAD, when used as a second reader, can significantly improve radiographer reading performance with only a moderate increase in interpretation times.

  17. Theorema 2.0: Computer-Assisted Natural-Style Mathematics

    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.

  18. A mutual-information-based registration algorithm for ultrasound-guided computer-assisted orthopaedic surgery

    Chen, Thomas K.; Abolmaesumi, Purang

    2005-04-01

    This paper presents a novel approach and its preliminary laboratory results for the employment of ultrasound (US) imaging in intraoperative guidance of computer-assisted orthopaedic surgeries (CAOS). The goal is to register live intraoperative US images with preoperative surgical planning data using minimal number of images. Preoperatively, a set of 2D US images are acquired with the corresponding positional information of the US probe provided by an optical tracking system. Using calibration parameters, the position of every pixel in the acquired images is transformed into the world coordinate frame to construct a 3D volumetric representation of the targeted anatomy for surgical planning. Intraoperatively, the surgeon takes live US images from the patient with the position of the US probe tracked in real time. A mutual-information-based registration algorithm is then used to find the closest match to the live image in the preoperative US image database. Because the position of the preoperative image inside the US volume is known, we are able to register the preoperative US volume to the live image, thus to the patient. Experiments have shown the registration algorithm has sub-millimeter accuracy in localizing the best match between the intraoperative and pre-operative images, demonstrating great potential for orthopaedic surgery applications. This method has some significant advantages over the previously reported US-guided CAOS techniques: it requires no segmentation, and employs only a few intraoperative images to accurately and robustly localize the patient. Preliminary laboratory results on both a Sawbones model of a radius bone and human subjects are presented.

  19. Computer-assisted diagnosis for lung nodule detection using a neural network technique

    Lo, Shih-Chung B.; Freedman, Matthew T.; Lin, Jyh-Shyan; Krasner, Brian; Mun, Seong K.

    1992-06-01

    The potential advantages of using digital techniques instead of film-based radiology have been discussed very extensively for the past ten years. These advantages are found mainly in the computer management of picture archiving and communication systems (PACS). On the other hand, the computer-assisted diagnosis (CADx) could potentially enhance radiological services in the future. Lung nodule detection has been a clinically difficult subject for many years. Most of the literature has indicated that the finding rate for lung nodules (size range from 3 mm to 15 mm) is only about 65%, and 30% of the missing nodule can be found retrospectively. In the recent research, imaging processing techniques, such as thresholding and morphological analysis, have been employed to enhance the true-positive detection. However, these methods still produce many false-positive detections. We have used neural networks to distinguish true-positives from the suspected areas-of-interest which are generated from signal enhanced image. The initial results show that the trained neural networks program can increase true-positive detections and drastically reduce the number of false-positive detections. This program can perform three modes of lung nodule detection: (1) thresholding, (2) profile matching analysis, and (3) neural network. This program is fully automatic and has been implemented in a DEC 5000/200 workstation. The total processing time for all three methods is less than 35 seconds. We are planning to link this workstation to our PACS for further clinical evaluation. In this paper, we report our neural network and fast algorithms for various image processing techniques for the lung nodule detection and show the results of the initial studies.

  20. IAEA co-ordinated research programme on the intercomparison of computer-assisted scintigraphic techniques

    Further work carried out under the International Atomic Energy Agency (IAEA) Co-ordinated Research Programme on the Intercomparison of Computer-assisted Scintigraphic Techniques and reported at a Research Co-ordination Meeting that took place in Los Angeles from 24 to 30 October 1976 in conjunction with the IAEA Symposium on Medical Radionuclide Imaging is described. A third intercomparison of various digital data-processing techniques for image enhancement has been completed. This intercomparison was based on the distribution of gamma-camera data obtained in one centre by imaging an irregular organ phantom containing 99Tcsup(m), with added hot or cold lesions. A total of 56 valid sets of results was returned by 13 participating institutions. Concurrently, in order to establish a ''base-line'' for the study, nine independent observers returned a total of 14 evaluations of the corresponding sets of analogue scintigrams. An analysis of the results is presented. The findings complement and extend those of earlier intercomparisons under the Programme, particularly as regards the extent to which the results obtained with a given processing technique depend on the choice of display technique. Performance with digital processing and display techniques was at best slightly superior and generally similar or inferior to that with simple analogue display techniques at the same count density. It is concluded that the improvements to be realized from digital processing, if any, are not great. It is further concluded that the advantages of using a good display rather than a poor one are at least comparable with or probably greater than those of digital processing. An extension study to investigate further the interaction between processing and display techniques is proposed. (author)

  1. Computer-assisted technique for measuring K/sub I/ - V relationships

    Coyle, R.T.; Buhl, M.L. Jr.

    1983-03-01

    A computer-assisted data-collection technique was developed for flatjack-loaded, short-rod specimens to readily obtain crack velocity V as a function of stress-intensity facot rK/sub I/. The technique facilitates the study of stress corrosion in glass and ceramic materials and allows us to determine the crack velocity at which the critical stress intensity factor is evaluated. For the experimental procedure we used an apparatus for flatjack loading of short-rod samples to which was connected: (1) a stepper motor to automate pressurization of the flatjack; and (2) a digital oscilloscope to acquire information about the flatjack pressure and sample displacement at preslected time intervals. The stepper motor and the digital oscilloscope were both computer controlled. We designed the software so we could calculate K/sub I/ and V from the experimental data. Fracture experiments were conducted using samples of soda-lime-silicate float glass and alumino-borosilicate glass (Corning 7809 Solar Glass) in an environmental chamber at 25/sup 0/C and 30% relative humidity. It was found that the critical stress-intensity factor for flpoat glass, extrapolated to a crack elocity of 0.1 m/s, was 0.77 MPa m/sup 1/2/ compared to 0.81 MPa m/sup 1/2/ for the solar glass. Comparison of K/sub I/ versus V data for the two glasses showed that the coefficient n in the empirical relationship V = AK/sub I//sup n/ is 27.5 for the solar glass and 18 for float glass.

  2. ESTABLISHING A METHODOLOGY FOR BENCHMARKING SPEECH SYNTHESIS FOR COMPUTER-ASSISTED LANGUAGE LEARNING (CALL

    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.

  3. Role of scintigraphy and computer-assisted tomography in brain examination

    To assess the role of computer-assisted tomography (CAT) and scintigraphy in brain exploration, the authors analysed: (1) the diagnostic effectiveness of the two methods in 300 patients examined over a period of seven months; (2) the role assigned to each investigation in 169 patients operated on for intracranial lesion during the same period. The isotopic brain examination always included an initial angiographic study after the intravenous injection of a technetium compound. Study of the circulation of the cerebrospinal fluid was made with 111In-DTPA. The detection efficiency of CAT is higher than for scintigraphy in expansive processes, whereas, conversely, in cerebrovascular accidents of ischaemic origin, isotope angiography coupled with static imaging enables one to gain more information on cerebral perfusion than CAT. Similarly, when studying the cerebrospinal fluid, scintigraphy provides a greater amount of specific data on the mechanisms governing hydrocephalus, the mode of operation of a shunt, or the site of a cerebrospinal fluid fistula. Within a neurosurgical context, CAT by and large takes precedence in brain examination, but the investigation is usually accompanied by scintigraphy or a conventional neuroradiological examination. Scintigraphy was performed on 66% of the patients, whereas for neuroradiological examination the figure was 44%. Most of the scintigraphy came after CAT so as to obtain additional diagnostic information on the vascularization, the nature and, on occasion, the exact location of the lesion revealed by CAT. In more than one case out of two, scintigraphy provides enough additional information for one to avoid neuroradiological examination, which is more 'aggressive' and more dangerous. Hence scintigraphy represents an effective complement to CAT and can compete with the conventional neuroradiological technique. (author)

  4. Virtual colonoscopy: effect of computer-assisted detection (CAD) on radiographer performance

    Aim: To investigate the effect of a virtual colonoscopy (VC) computed-assisted detection (CAD) system on polyp detection by trained radiographers. Materials and methods: Four radiographers trained in VC interpretation and utilization of CAD systems read a total of 62 endoscopically validated VC examinations containing 150 polyps (size range 5-50 mm) in four sessions, recording any polyps found and the examination interpretation time, first without and then with the addition of CAD as a 'second reader'. After a temporal separation of 6 weeks to reduce recall bias, VC examinations were re-read using 'concurrent reader' CAD. Interpretation times, polyp detection, and number of false-positives were compared between the different reader paradigms using paired t and paired exact tests. Results: Overall, use of 'second reader' CAD significantly improved polyp detection by 12% (p < 0.001, CI 6%,17%)) from 48 to 60%. There was no significant improvement using CAD as a concurrent reader (p = 0.20; difference of 7%, CI -3%, 16%) and no significant overall difference in recorded false-positives with second reader or concurrent CAD paradigms compared with unassisted reading (p = 0.25 and 0.65, respectively). The mean interpretation time was 21.7 min for unassisted reading, 29.6 (p < 0.001) min for second reader and 19.1 min (p = 0.12) for concurrent reading paradigms. Conclusion: CAD, when used as a second reader, can significantly improve radiographer reading performance with only a moderate increase in interpretation times

  5. Comparison of computer-assisted planning and manual planning for depth electrode implantations in epilepsy.

    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 CAP, with 131 (78.9%) of 166 trajectories deemed suitable for implementation in clinical practice. CAP was performed in real time, with a median duration of 8 minutes for each patient, although this does not include the time taken for data preparation. CONCLUSIONS CAP is a promising tool to 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. PMID:26636383

  6. Total knee arthroplasty using computer assisted navigation in patients with severe valgus deformity of the knee

    SHAO Jun-jie; ZHANG Xian-long; WANG Qi; CHEN Yun-su; SHEN Hao; JIANG Yao

    2010-01-01

    Background Severe valgus deformity often has bone defect and laxity of the medial ligamentous, and total knee arthroplasty in severe valgus knee is, in most cases, more challenging for surgeons. The usefulness of a computer assisted navigation system in reestablishing the mechanical axis has been well established. Hence, the interest for surgeons is how the navigation system makes the procedure of total knee arthroplasty with severe valgus knee easier.Methods From June 2006 to March 2008 in Department of Joint Surgery, Shanghai Sixth People's Hospital, 6 patients (7 knees) with severe valgus knee underwent total knee arthroplasty using the Stryker Navigation system, which is an active wireless and imageless system. All the patients were followed up for 12 to 18 months after surgery. The X-ray radiographs for whole limbs were obtained on all patients to determine preoperative and postoperative alignments.Results A primary, posterior stabilized prosthesis was utilized in all cases. The average preoperative overall mechanical axis of the seven knees was 19.6°±4.6° of valgus (range 16° to 29°), and the average postoperative mechanical axis was 0.4°±0.7° (range 0.8° varus to 1.4° valgus ).Conclusions The navigation system is a very effective and useful tool for accurate intraoperative restoration of alignment in the face of significant deformity with valgus knee. To prevent component malposition, we did not reduce the knee before solidification of bone cement but controlled alignment using the navigation system up to implantation of the final component.

  7. CAVASS: a computer-assisted visualization and analysis software system - image processing aspects

    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

  8. Computer-Assisted Training as a Complement in Rehabilitation of Patients With Chronic Vestibular Dizziness-A Randomized Controlled Trial

    Brandt, Michael Smærup; Gro¨nvall, Erik; Larsen, Simon B.;

    2015-01-01

    Objective To compare a computer exercise program with conservative home-training following printed instructions in the rehabilitation of elderly patients with vestibular dysfunction. Design Single-blind, randomized, controlled trial. Setting Geriatric Department, Aarhus University Hospital....... Participants Sixty-three elderly patients with chronic dizziness due to vestibular dysfunction were randomly assigned to either rehabilitation in the clinic followed by computer-assisted home exercises (intervention group: n=32), or rehabilitation in the clinic followed by home exercises according to printed...... rate during 16 weeks to computer program exercises was 57 %. Conclusion A computer assisted program to support the home training of elderly patients with vestibular dysfunction did not improve rehabilitation more than printed instructions....

  9. Assessing knowledge of human papillomavirus and collecting data on sexual behavior: computer assisted telephone versus face to face interviews

    Garland Suzanne; Ryall Richard; Croy Samantha; Pitts Marian; Lyons Anthony; Smith Anthony; Wong Mee; Tay Eng

    2009-01-01

    Abstract Background Education campaigns seeking to raise awareness of human papillomavirus (HPV) and promoting HPV vaccination depend on accurate surveys of public awareness and knowledge of HPV and related sexual behavior. However, the most recent population-based studies have relied largely on computer-assisted telephone interviews (CATI) as opposed to face to face interviews (FTFI). It is currently unknown how these survey modes differ, and in particular whether they attract similar demogr...

  10. The Development Of Career Competence Instrument Based On Computer Assisted Testing For Students Of Junior High Schools In Jakarta, Indonesia

    Dr. Gantina Komalasari, M.Psi; danHerdi, M.Pd.

    2015-01-01

    This research is motivated by results of theoretical studies and empirical facts about the importance of student’s career competence achievement, as well as the study of government policies on the mandate for the assessment in the specialization program/career counseling of Junior High School students. The research was aimed at developing student’s career competence standardized instrument based on Computer Assisted Testing (CAT) which is effective as a support system of specialization pr...

  11. A comparative study between xerographic, computer-assisted overlay generation and animated-superimposition methods in bite mark analyses.

    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, pcomputer-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. PMID:27591538

  12. The Application of Audio Computer-Assisted Self-Interviews (ACASI) to Collect Self-Reported Health Data: An Overview

    Brown, J L; Swartzendruber, A.; DiClemente, R. J.

    2013-01-01

    For assessment of sensitive health behaviors (e.g., sexual behavior, violent behaviors, substance use), research is typically limited to an examination of self-reports of past behavior. Audio computer-assisted self-interviews (ACASI) may enhance the validity of self-report data in research and clinical settings by reducing measurement bias. This paper provides an introduction to ACASI for collection of self-reported health data. The potential benefits and cost-effectiveness of ACASI use in re...

  13. Computer-Assisted Detection of Pulmonary Nodules: Preliminary Observations Using a Prototype System with Multidetector-Row CT Data Sets

    Lawler, Leo P.; Wood, Susan A.; Pannu, Harpreet S.; Fishman, Elliot K.

    2003-01-01

    The continued revolution in multidetector-row CT (MDCT) scanning increases the quality of lung imaging but at the cost of a greater burden of data for review and interpretation. This article discusses our preliminary experience with prototype software for lung nodule detection and characterization using MDCT data sets. We discuss the potential role of computer-assisted detection (CAD) as applied to the automatic detection of lung nodules. We also review the process of CAD, outline its potenti...

  14. The effectiveness of a computer-assisted instruction programme on communication skills of medical specialists in oncology.

    Hulsman, R.L.; Ros, W.J.G.; Winnubst, J.A.M.; Bensing, J.

    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 instruction (CAI) programme was developed -'Interact-Cancer' - which is a time-efficient learning method and easily accessible at the workplace. To investigate the effect of the CAI training, 'Interact-Ca...

  15. Perceptions of Audio Computer-Assisted Self-Interviewing (ACASI) among Women in an HIV-Positive Prevention Program

    Estes, Larissa J.; Lloyd, Linda E.; Michelle Teti; Sheela Raja; Lisa Bowleg; Allgood, Kristi L.; Nancy Glick

    2010-01-01

    BACKGROUND: Audio Computer-Assisted Self Interviewing (ACASI) has improved the reliability and accuracy of self-reported HIV health and risk behavior data, yet few studies account for how participants experience the data collection process. METHODOLOGY/PRINCIPAL FINDINGS: This exploratory qualitative analysis aimed to better understand the experience and implications of using ACASI among HIV-positive women participating in sexual risk reduction interventions in Chicago (n = 12) and Philadelph...

  16. Minimally invasive pedicle screw fixation utilizing O-arm fluoroscopy with computer-assisted navigation: Feasibility, technique, and preliminary results

    Park, Paul; Foley, Kevin T; Cowan, John A; Marca, Frank La

    2010-01-01

    Background: Pedicle screw misplacement is relatively common, with reported rates ranging up to 42%. Although computer-assisted image guidance (CaIG) has been shown to improve accuracy in open spinal surgery, its use in minimally invasive procedures has not been as well evaluated. We present our technique and review the results from a cohort of patients who underwent minimally invasive lumbar pedicle screw placement utilizing the O-arm imaging unit in conjunction with the StealthStation Treon ...

  17. Computer-assisted history-taking systems (CAHTS) in health care: benefits, risks and potential for further development

    Yannis Pappas; Chantelle Anandan; Joseph Liu; Josip Car; Aziz Sheikh; Azeem Majeed

    2011-01-01

    Background A computer-assisted history-taking system (CAHTS) is a tool that aids clinicians in gathering data from patients to inform a diagnosis or treatment plan. Despite the many possible applications and even though CAHTS have been available for nearly three decades, these remain underused in routine clinical practice. Objective Through an interpretative review of the literature, we provide an overview of the field of CAHTS, which also offers an understanding of the impact of these sys...

  18. Effect of surgical experience on imageless computer-assisted femoral component positioning in hip resurfacing – a preclinical study

    Stiehler, Maik; Goronzy, Jens; Kirschner, Stephan; Hartmann, Albrecht; Schäfer, Torsten; Günther, Klaus-Peter

    2015-01-01

    Background: The clinical outcome of hip resurfacing (HR) as a demanding surgical technique associated with a substantial learning curve depends on the position of the femoral component. The aim of the study was to investigate the effects of the level of surgical experience on computer-assisted imageless navigation concerning precision of femoral component positioning, notching, and oversizing rate, as well as operative time. Methods: Three surgeons with different levels of experienc...

  19. GridIMAGE: A Novel Use of Grid Computing to Support Interactive Human and Computer-Assisted Detection Decision Support

    Gurcan, Metin N.; Pan, Tony; Sharma, Ashish; Kurc, Tahsin; Oster, Scott; Langella, Stephen; Hastings, Shannon; Siddiqui, Khan M.; Siegel, Eliot L.; Saltz, Joel

    2007-01-01

    This paper describes a Grid-aware image reviewing system (GridIMAGE) that allows practitioners to (a) select images from multiple geographically distributed digital imaging and communication in medicine (DICOM) servers, (b) send those images to a specified group of human readers and computer-assisted detection (CAD) algorithms, and (c) obtain and compare interpretations from human readers and CAD algorithms. The currently implemented system was developed using the National Cancer Institute ca...

  20. What is needed to implement a computer-assisted health risk assessment tool? An exploratory concept mapping study

    Ahmad Farah; Norman Cameron; O’Campo Patricia

    2012-01-01

    Abstract Background Emerging eHealth tools could facilitate the delivery of comprehensive care in time-constrained clinical settings. One such tool is interactive computer-assisted health-risk assessments (HRA), which may improve provider-patient communication at the point of care, particularly for psychosocial health concerns, which remain under-detected in clinical encounters. The research team explored the perspectives of healthcare providers representing a variety of disciplines (physicia...

  1. Teachers’ and Students' Attitudes Towards Traditional and Computer Assisted Blended Teaching and Learning Processes in Mechanical Engineering Subjects Area

    Abdulrasool, Salah Mahdi; Mishra, Rakesh; Khalaf, Haifa

    2010-01-01

    The effectiveness of traditional teaching-learning process in Computer Aided Design (CAD), Computer Aided Manufacturing CAM and Computer Numerical control CNC (CAD-CAM-CNC) module has been evaluated against recently developed two blended teaching learning models. The blended learning systems have been developed by integrating computer assisted instructions with the traditional teaching learning system. This study in particular reports teachers’ and students’ views about various facets of teac...

  2. Accurate measurement of surface areas of anatomical structures by computer-assisted triangulation of computed tomography images

    There is a need for accurate surface area measurement of internal anatomical structures in order to define light dosimetry in adjunctive intraoperative photodynamic therapy (AIOPDT). The authors investigated whether computer-assisted triangulation of serial sections generated by computed tomography (CT) scanning can give an accurate assessment of the surface area of the walls of the true pelvis after anterior resection and before colorectal anastomosis. They show that the technique of paper density tessellation is an acceptable method of measuring the surface areas of phantom objects, with a maximum error of 0.5%, and is used as the gold standard. Computer-assisted triangulation of CT images of standard geometric objects and accurately-constructed pelvic phantoms gives a surface area assessment with a maximum error of 2.5% compared with the gold standard. The CT images of 20 patients' pelves have been analysed by computer-assisted triangulation and this shows the surface area of the walls varies from 143 cm2 to 392 cm2. (Author)

  3. Surgical navigation in oral implantology.

    Miller, Robert J; Bier, Jurgen

    2006-03-01

    The ability to generate 3-dimensional volumetric images of the maxillofacial area has allowed surgeons to evaluate anatomy before surgery and plan for the placement of implants in ideal positions. However, the ability to transfer that information to surgical reality has been the most challenging part of implant dentistry. With the advent of computer-assisted surgery, the surgeon may now navigate through the entire implant procedure with extremely high accuracy. A new portable laptop navigated system for oral implantology is discussed as an adjunct for complex implant cases. PMID:16569960

  4. Toward Implementing Computer-Assisted Foreign Language Assessment in the Official Spanish University Entrance Examination

    Sanz, Ana Gimeno; Pavón, Ana Sevilla

    2015-01-01

    In 2008 the Spanish Government announced the inclusion of an oral section in the foreign language exam of the National University Entrance Examination during the year 2012 (Royal Decree 1892/2008, of 14 November 2008, Ministerio de Educación, Gobierno de España, 2008). Still awaiting the implementation of these changes, and in an attempt to offer…

  5. Management of chemo- and radiotherapy induced oral mucositis with low-energy laser: initial results of A.C. Camargo Hospital Manejo da mucosite oral induzida por quimioterapia e radioterapia com laser de baixa potência: resultados iniciais do Hospital A.C. Camargo

    Renata Lazari Sandoval

    2003-12-01

    Full Text Available Background. Oral mucositis is a common complication of some malignancies treatment, causing therapeutic modifications due to patient's debilitation, which often interferes with the prognosis of the disease. Many attempts have been made to find an optimal treatment or preventive method to minimize the severity of oral mucositis. Several studies have shown good results with the use of low-energy laser, with the aim of accelerating the process of wound healing and promoting pain relief. Methods. Patients (n=18 who developed oral mucositis during chemotherapy and/or radiotherapy were submitted to low-energy laser applications until cessation of symptoms. Mucositis severity was scored by an oral mucositis scale based on clinical features and by an oral toxicity scale from the National Cancer Institute based on the ability to swallow; pain severity was scored by subjects on a visual analogue scale before and after the applications. Results. Immediate pain relief was achieved in 66.6% of the patients after the first application. Based on the functional scale, mucositis grade III (not capable to eat solids was reduced in 42.85% of the cases. According to the scale based on the clinical features, mucositis grade IV (ulcerative lesions was reduced in 75% of the patients that presented this grade of mucositis at the beginning of laser therapy. Conclusions. Low-energy laser was well-tolerated and showed beneficial effects on the management of oral mucositis, improving the quality of life during the oncologic treatment.Mucosite é a complicação oral mais comum do tratamento de algumas doenças malignas, podendo causar a necessidade de modificações terapêuticas, o que pode interferir com o prognóstico da doença. Muitas tentativas têm sido feitas com o intuito de desenvolver um tratamento ou método preventivo para minimizar a severidade da mucosite oral. Vários estudos têm mostrado bons resultados com o uso do laser de baixa potência, devido

  6. Contemporary issues for experimental design in assessment of medical imaging and computer-assist systems

    Wagner, Robert F.; Beiden, Sergey V.; Campbell, Gregory; Metz, Charles E.; Sacks, William M.

    2003-05-01

    The dialog among investigators in academia, industry, NIH, and the FDA has grown in recent years on topics of historic interest to attendees of these SPIE sub-conferences on Image Perception, Observer Performance, and Technology Assessment. Several of the most visible issues in this regard have been the emergence of digital mammography and modalities for computer-assisted detection and diagnosis in breast and lung imaging. These issues appear to be only the "tip of the iceberg" foreshadowing a number of emerging advances in imaging technology. So it is timely to make some general remarks looking back and looking ahead at the landscape (or seascape). The advances have been facilitated and documented in several forums. The major role of the SPIE Medical Imaging Conferences i well-known to all of us. Many of us were also present at the Medical Image Perception Society and co-sponsored by CDRH and NCI in September of 2001 at Airlie House, VA. The workshops and discussions held at that conference addressed some critical contemporary issues related to how society - and in particular industry and FDA - approach the general assessment problem. A great deal of inspiration for these discussions was also drawn from several workshops in recent years sponsored by the Biomedical Imaging Program of the National Cancer Institute on these issues, in particular the problem of "The Moving Target" of imaging technology. Another critical phenomenon deserving our attention is the fact that the Fourth National Forum on Biomedical Imaging in Oncology was recently held in Bethesda, MD., February 6-7, 2003. These forums are presented by the National Cancer Institute (NCI), the Food and Drug Administration (FDA), the Centers for Medicare and Medicaid Services (CMS), and the National Electrical Manufacturers Association (NEMA). They are sponsored by the National Institutes of Health/Foundation for Advanced Education in the Sciences (NIH/FAES). These forums led to the development of the NCI

  7. Computer-assisted diagnostic system for neurodegenerative dementia using brain SPECT and 3D-SSP

    Ishii, Kazunari; Kanda, Tomonori; Uemura, Takafumi; Miyamoto, Naokazu; Yoshikawa, Toshiki [Hyogo Brain and Heart Center, Department of Radiology and Nuclear Medicine, Himeji, Hyogo (Japan); Shimada, Kenichi; Ohkawa, Shingo [Hyogo Brain and Heart Center, Institute for Aging Brain and Cognitive Disorders, Himeji, Hyogo (Japan); Minoshima, Satoshi [University of Washington, Radiology and Bioengineering, Department of Radiology, Seattle, WA (United States)

    2009-05-15

    To develop a computer-assisted automated diagnostic system to distinguish among Alzheimer disease (AD), dementia with Lewy bodies (DLB), and other degenerative disorders in patients with mild dementia. Single photon emission computed tomography (SPECT) images with injection of N-Isopropyl-p-[{sup 123}I]iodoamphetamine (IMP) were obtained from patients with mild degenerative dementia. First, datasets from 20 patients mild AD, 15 patients with dementia with DLB, and 17 healthy controls were used to develop an automated diagnosing system based on three-dimensional stereotactic surface projections (3D-SSP). AD- and DLB-specific regional templates were created using 3D-SSP, and critical Z scores in the templates were established. Datasets from 50 AD patients, 8 DLB patients, and 10 patients with non-AD/DLB type degenerative dementia (5 with frontotemporal dementia and 5 with progressive supranuclear palsy) were then used to test the diagnostic accuracy of the optimized automated system in comparison to the diagnostic interpretation of conventional IMP-SPECT images. These comparisons were performed to differentiate AD and DLB from non-AD/DLB and to distinguish AD from DLB. A receiver operating characteristic (ROC) analysis was performed. The area under the ROC curve (Az) and the accuracy of the automated diagnosis system were 0.89 and 82%, respectively, for AD/DLB vs. non-AD/DLB patients, and 0.70 and 65%, respectively, for AD vs. DLB patients. The mean Az and the accuracy of the visual inspection were 0.84 and 77%, respectively, for AD/DLB vs. non-AD/DLB patients, and 0.70 and 65%, respectively, for AD vs. DLB patients. The mean Az and the accuracy of the combination of visual inspection and this system were 0.96 and 91%, respectively, for AD/DLB vs. non-AD/DLB patients, and 0.70 and 66%, respectively, for AD vs. DLB patients. The system developed in the present study achieved as good discrimination of AD, DLB, and other degenerative disorders in patients with mild

  8. [Scaphoid percutaneous osteosynthesis by screw using computer assisted surgery: an experimental study].

    Liverneaux, P

    2005-01-01

    Scaphoid fractures are sometimes difficult to diagnose and even more difficult to fix. Recent progress such as miniaturization of osteosynthesis material, adoption of the percutaneous route, and widening of the indications to include undisplaced fractures has still not abolished complications. In this context, computer assisted surgery (CAS) may be useful and deserves further study. To apply it to the scaphoid, it is initially necessary to immobilize the "wrist hand fingers" unit in a device adapted to make it a rigid unit. It is then necessary to choose the correct configuration of CAS system. The pedicular fluoroscopic navigation system, which is apparently similar to scaphoid screw insertion, was chosen for this study. The goal of this study is to define the osteosynthesis bases of the scaphoid with CAS. A fresh anatomical subject divided at the elbow joint was prepared at the DETERCA laboratory of the university Bordeaux 2. The solid "wrist hand fingers" unit was immobilized in extension and ulnar deviation of the wrist by a malleable, stable and radio transparent device. The first stage consisted of a calibration of the surgical instruments and the "wrist hand fingers" unit, with a three-dimensional optical localization system. The guide wire was simulated by a gauged stylet. When the axis and the length of the screw had been determined virtually, insertion of the guide wire was carried out under guidance of the virtual images of the computer's screen, without the assistance of the fluoroscopy. Finally the canulated screw was inserted over the guide wire. Insertion was stopped when the screw reached the intra osseous virtually predetermined length. A check using conventional fluoroscopy made it possible to ensure the correct positioning of the screw. Our results show that it is possible to insert a screw into a scaphoid without conventional fluoroscopy, by using the fluoroscopic navigation system. The procedure was performed without difficulty, apart from the

  9. Learning curve of computer-assisted navigation system in spine surgery

    BAI Yu-shu; ZHANG Ye; CHEN Zi-qiang; WANG Chuan-feng; ZHAO Ying-chuan; SHI Zhi-cai; LI Ming; LIU Ka Po Gabriel

    2010-01-01

    Background Spine surgery using computer-assisted navigation (CAN) has been proven to result in low screw misplacement rates, low incidence of radiation exposure and excellent operative field viewing versus the conventional intraoperative image intensifier (CⅢ). However, as we know, few previous studies have described the learning curve of CAN in spine surgery.Methods We performed two consecutive case cohort studies on pedicel screw accuracy and operative time of two spine surgeons with different experience backgrounds, A and B, in one institution during the same period. Lumbar pedicel screw cortical perforation rate and operative time of the same kind of operation using CAN were analyzed and compared using CⅢ for the two surgeons at initial, 6 months and 12 months of CAN usage.Results CAN spine surgery had an overall lower cortical perforation rate and less mean operative time compared with CⅢ for both surgeon A and B cohorts when total cases of four years were included. It missed being statistically significant,with 3.3% versus 4.7% (P=0.191) and 125.7 versus 132.3 minutes (P=0.428) for surgeon A and 3.6% versus 6.4%(P=0.058), and 183.2 versus 213.2 minutes (P=0.070) for surgeon B. in an attempt to demonstrate the learning curve,the cases after 6 months of the CAN system in each surgeon's cohort were compared. The perforation rate decreased by 2.4% (P=0.039) and 4.3% (P=0.003) and the operative time was reduced by 31.8 minutes (P=0.002) and 14.4 minutes (P=0.026) for the CAN groups of surgeons A and B, respectively. When only the cases performed after 12 months using the CAN system were considered, the perforation rate decreased by 3.9% (P=0.006) and 5.6% (P <0.001) and the operative time was reduced by 20.9 minutes (P <0.001) and 40.3 minutes (P <0.001) for the CAN groups of surgeon A and B, respectively.Conclusions In the long run, CAN spine surgery decreased the lumbar screw cortical perforation rate and operative time. The learning curve showed a

  10. Computer-assisted diagnostic system for neurodegenerative dementia using brain SPECT and 3D-SSP

    To develop a computer-assisted automated diagnostic system to distinguish among Alzheimer disease (AD), dementia with Lewy bodies (DLB), and other degenerative disorders in patients with mild dementia. Single photon emission computed tomography (SPECT) images with injection of N-Isopropyl-p-[123I]iodoamphetamine (IMP) were obtained from patients with mild degenerative dementia. First, datasets from 20 patients mild AD, 15 patients with dementia with DLB, and 17 healthy controls were used to develop an automated diagnosing system based on three-dimensional stereotactic surface projections (3D-SSP). AD- and DLB-specific regional templates were created using 3D-SSP, and critical Z scores in the templates were established. Datasets from 50 AD patients, 8 DLB patients, and 10 patients with non-AD/DLB type degenerative dementia (5 with frontotemporal dementia and 5 with progressive supranuclear palsy) were then used to test the diagnostic accuracy of the optimized automated system in comparison to the diagnostic interpretation of conventional IMP-SPECT images. These comparisons were performed to differentiate AD and DLB from non-AD/DLB and to distinguish AD from DLB. A receiver operating characteristic (ROC) analysis was performed. The area under the ROC curve (Az) and the accuracy of the automated diagnosis system were 0.89 and 82%, respectively, for AD/DLB vs. non-AD/DLB patients, and 0.70 and 65%, respectively, for AD vs. DLB patients. The mean Az and the accuracy of the visual inspection were 0.84 and 77%, respectively, for AD/DLB vs. non-AD/DLB patients, and 0.70 and 65%, respectively, for AD vs. DLB patients. The mean Az and the accuracy of the combination of visual inspection and this system were 0.96 and 91%, respectively, for AD/DLB vs. non-AD/DLB patients, and 0.70 and 66%, respectively, for AD vs. DLB patients. The system developed in the present study achieved as good discrimination of AD, DLB, and other degenerative disorders in patients with mild dementia

  11. Using Computer-Assisted Argumentation Mapping to develop effective argumentation skills in high school advanced placement physics

    Heglund, Brian

    Educators recognize the importance of reasoning ability for development of critical thinking skills, conceptual change, metacognition, and participation in 21st century society. There is a recognized need for students to improve their skills of argumentation, however, argumentation is not explicitly taught outside logic and philosophy---subjects that are not part of the K-12 curriculum. One potential way of supporting the development of argumentation skills in the K-12 context is through incorporating Computer-Assisted Argument Mapping to evaluate arguments. This quasi-experimental study tested the effects of such argument mapping software and was informed by the following two research questions: 1. To what extent does the collaborative use of Computer-Assisted Argumentation Mapping to evaluate competing theories influence the critical thinking skill of argument evaluation, metacognitive awareness, and conceptual knowledge acquisition in high school Advanced Placement physics, compared to the more traditional method of text tables that does not employ Computer-Assisted Argumentation Mapping? 2. What are the student perceptions of the pros and cons of argument evaluation in the high school Advanced Placement physics environment? This study examined changes in critical thinking skills, including argumentation evaluation skills, as well as metacognitive awareness and conceptual knowledge, in two groups: a treatment group using Computer-Assisted Argumentation Mapping to evaluate physics arguments, and a comparison group using text tables to evaluate physics arguments. Quantitative and qualitative methods for collecting and analyzing data were used to answer the research questions. Quantitative data indicated no significant difference between the experimental groups, and qualitative data suggested students perceived pros and cons of argument evaluation in the high school Advanced Placement physics environment, such as self-reported sense of improvement in argument

  12. Characterization of AcMNPV with a deletion of ac69 gene

    Jianhao Ke

    2011-07-01

    Full Text Available ORF69 (Ac69 of Autographa californica multiple nucleopolyhedrovirus (AcMNPV is conserved in some baculovirus genomes. Although it has been shown that Ac69 has cap 0-dependent methyltransferase activity and is not required for budded virus production in Spodoptera frugiperda Sf-9 cells, its role in occlusion-derived virus synthesis and virus oral infectivity is not known. This paper describes generation of an ac69 knockout AcMNPV bacmid mutant and analyses of the influence of ac69 deletion on the viral infectivity in Sf-9 cells and Trichoplusia ni larvae so as to investigate the role of ac69 in the viral life cycle. Results indicated that ac69 deletion has little effect on the production rates and morphogenesis of budded virus and occlusion-derived virus in Sf-9 cells. In addition, animal experiment revealed that the deletion mutant did not affect AcMNPV infectivity for Trichoplusia ni larvae in LD50 and LT50 bioassay when administered orally. These results suggest that ac69 may be dispensable for viral infectivity both in vitro and in vivo.

  13. Computer-Assisted Detection of Collapse Pits in LROC NAC Images

    Wagner, R. V.; Robinson, M. S.

    2012-12-01

    150 small (average diameter 15m) pits in impact melt deposits of Copernican craters [1]. More recently, improvements to the algorithm revealed two new large mare pits, similar to the three pits discovered in Kaguya images [2]. One is in Schlüter crater, a mare-filled crater near Orientale basin, with a 20 x 40m opening, approximately 60 m deep. The second new pit is in Lacus Mortis (44.96°N, 25.61°E) in a tectonically complex region west of Burg crater, This pit is the largest mare pit found to date, with an opening approximately 100 x 150 m, and a floor more than 90 m below the surrounding terrain. Most interesting from an exploration point of view is the fact that the east wall appears to have collapsed, leaving a relatively smooth ~22° slope from the surrounding mare down to the pit floor. Computer-assisted feature detection is an effective method of locating rare features in the extremely large high-resolution NAC dataset. Pitscan enabled the discovery of unknown collapse pits both in the mare and highlands. These pits are an important resource for future surface exploration, both by providing access to pristine cross-sections of the near-surface and by providing radiation and micrometorite shielding for human outposts. [1] Wagner, R.V. et al. (2012), LPSC XLIII, #2266 [2] Haruyama, J. et al. (2010), LPSC XLI, #1285

  14. Computer-assisted visual interactive recognition and its prospects of implementation over the Internet

    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

  15. Preliminary Development of a Workstation for Craniomaxillofacial Surgical Procedures: Introducing a Computer-Assisted Planning and Execution System

    Gordon, Chad R.; Murphy, Ryan J.; Coon, Devin; Basafa, Ehsan; Otake, Yoshito; Al Rakan, Mohammed; Rada, Erin; Susarla, Sriniras; Swanson, Edward; Fishman, Elliot; Santiago, Gabriel; Brandacher, Gerald; Liacouras, Peter; Grant, Gerald; Armand, Mehran

    2014-01-01

    Introduction Facial transplantation represents one of the most complicated scenarios in craniofacial surgery because of skeletal, aesthetic, and dental discrepancies between donor and recipient. However, standard off-the-shelf vendor computer-assisted surgery systems may not provide custom features to mitigate the increased complexity of this particular procedure. We propose to develop a computer-assisted surgery solution customized for preoperative planning, intraoperative navigation including cutting guides, and dynamic, instantaneous feedback of cephalometric measurements/angles as needed for facial transplantation. Methods We developed the Computer-Assisted Planning and Execution (CAPE) workstation to assist with planning and execution of facial transplantation. Preoperative maxillofacial computed tomography (CT) scans were obtained on 4 size-mismatched miniature swine encompassing 2 live face-jaw-teeth transplants. The system was tested in a laboratory setting using plastic models of mismatched swine, after which the system was used in 2 live swine transplants. Postoperative CT imaging was obtained and compared with the preoperative plan and intraoperative measures from the CAPE workstation for both transplants. Results Plastic model tests familiarized the team with the CAPE workstation and identified several defects in the workflow. Live swine surgeries demonstrated utility of the CAPE system in the operating room, showing submillimeter registration error of 0.6 ± 0.24 mm and promising qualitative comparisons between intraoperative data and postoperative CT imaging. Conclusions The initial development of the CAPE workstation demonstrated integration of computer planning and intraoperative navigation for facial transplantation are possible with submillimeter accuracy. This approach can potentially improve preoperative planning, allowing ideal donor-recipient matching despite significant size mismatch, and accurate surgical execution. PMID:24406592

  16. Bone marrow lesions in knee osteoarthritis: MR-assessment by manual segmentation and computer-assisted tresholding

    Krogh Nielsen, Flemming; Jurik, Anne Grethe; Peters, David Alberg;

    2012-01-01

    Purpose To assess the potential of methods to register changes over time of MR detected bone marrow lesions (BML) in knee osteoarthritis (KOA). Methods & Materials Repeated (3 month – 1 year) Gd-enhanced sagittal T1 fat-suppressed MRI of 13 knees with medial KOA (ACR-criteria). Female/male=12....../1; median age 60.5 years (41.1-72.3). Volumes of BMLs in the medial femoral and tibial condyles (52 observations) were measured/calculated on anonymized images by two observers using manual segmentation (MS) and computer assisted tresholding (CAT) relative to signal intensity of normal marrow. Results were...

  17. Computer-Assisted Structure Elucidation of Black Chokeberry (Aronia melanocarpa) Fruit Juice Isolates with a New Fused Pentacyclic Flavonoid Skeleton.

    Naman, C Benjamin; Li, Jie; Moser, Arvin; Hendrycks, Jeffery M; Benatrehina, P Annécie; Chai, Heebyung; Yuan, Chunhua; Keller, William J; Kinghorn, A Douglas

    2015-06-19

    Melanodiol 4″-O-protocatechuate (1) and melanodiol (2) represent novel flavonoid derivatives isolated from a botanical dietary supplement ingredient, dried black chokeberry (Aronia melanocarpa) fruit juice. These noncrystalline compounds possess an unprecedented fused pentacyclic core with two contiguous hemiketals. Due to having significant hydrogen deficiency indices, their structures were determined using computer-assisted structure elucidation software. The in vitro hydroxyl radical-scavenging and quinone reductase-inducing activity of each compound are reported, and a plausible biogenetic scheme is proposed. PMID:26030740

  18. The Comparison of Learning Radiographic Extraoral Anatomic Landmarks through Lecture and blended method(Computer-Assisted teaching and Lecture:An interventional Study

    T ahmine Razi

    2013-05-01

    Full Text Available Introduction: One of the main problems in learning extraoral radiographic anatomic indexes is the long interval between presentation of radiology and human anatomy courses, resulting in forgetting anatomic regions. Therefore, radiographic indexes are formed as complete abstract and transient images in students’ minds; as a result, their learning and retention decrease. The aim of this study was to compare lecture with combination of computer-assisted learning and lecture of extra-oral radiographic landmarks among dental students. Methods: This interventional study was carried out in 2009 on 51 dental students of Tabriz University of Medical Sciences. Students were randomly allocated into two groups. The first group was taught through a teaching method which involved lectures in the classroom. In the second group, a CD was given to the students. The teaching was accomplished through presentation using skull. Six months after finishing the teaching, both groups took a similar test for evaluation of long term learning. The data was analyzed by SPSS 16 using U Mann-Whitney test. Results: There was no significant differences in the mean scores between the two groups in the first exam after teaching (P=0.13, yet it was significant in the second exam (regarding retention (P=0.006, and average of non-traditional teaching method group (20.89±10.23 was higher than that of lecture group (13.48±6.39. Conclusion: Based on the results, non-traditional technique of teaching was not more effective than the lecture in short-term learning but in longterm learning, non-traditional technique was more effective than the lecture.

  19. Computer-assisted lateralization of unilateral temporal lobe epilepsy using Z-score parametric F-18 FDG PET images

    To evaluate the use of unbiased computer-assisted lateralization of temporal lobe epilepsy (TLE) by z-score parametric PET imaging (ZPET). 38 patients with histologically proven unilateral TLE due to pure hippocampal sclerosis, referred for pre-surgical PET evaluation of intractable seizure over a 5-year period, were included. The F-18 FDG images were oriented along temporal long axis and then transformed into ZPET images on a voxel by voxel basis. Multiple regions of interests (21 in total) were placed on cortical, subcortical and cerebellar structures on twenty-eight out of 38 patients with totally seizure-free (class I) outcome. Paired t-tests with Bonferroni correction were used to determine the location of the most asymmetric regions as variables for subsequent discriminant analysis of the entire group of the patients. The computer program identified the anterior half of the temporal lobe (p < 0.0005) and thalami (p = 0.021) as the most asymmetric regions in TLE patients with Class I outcome. Discriminant analysis using z-scores from a total of 8 ROIs (in 4 pairs) on these structures correctly lateralized thirty-seven out of 38 (97%) patients (sensitivity = 94%; specificity = 100%). The only false localization came from a patient with equivocal z-scores on the temporal lobes and this patient turned out to have poor outcome. The computer-assisted lateralization of TLE using ZPET provides an accurate, fast and objective way of seizure evaluation

  20. Impact of computer-assisted data collection, evaluation and management on the cancer genetic counselor's time providing patient care.

    Cohen, Stephanie A; McIlvried, Dawn E

    2011-06-01

    Cancer genetic counseling sessions traditionally encompass collecting medical and family history information, evaluating that information for the likelihood of a genetic predisposition for a hereditary cancer syndrome, conveying that information to the patient, offering genetic testing when appropriate, obtaining consent and subsequently documenting the encounter with a clinic note and pedigree. Software programs exist to collect family and medical history information electronically, intending to improve efficiency and simplicity of collecting, managing and storing this data. This study compares the genetic counselor's time spent in cancer genetic counseling tasks in a traditional model and one using computer-assisted data collection, which is then used to generate a pedigree, risk assessment and consult note. Genetic counselor time spent collecting family and medical history and providing face-to-face counseling for a new patient session decreased from an average of 85-69 min when using the computer-assisted data collection. However, there was no statistically significant change in overall genetic counselor time on all aspects of the genetic counseling process, due to an increased amount of time spent generating an electronic pedigree and consult note. Improvements in the computer program's technical design would potentially minimize data manipulation. Certain aspects of this program, such as electronic collection of family history and risk assessment, appear effective in improving cancer genetic counseling efficiency while others, such as generating an electronic pedigree and consult note, do not. PMID:21240560

  1. The Combination of Lecture-Based Education and Computer-Assisted learning (CAL in the Preliminary Hospital Pharmacy Internship Course

    Mohammad Charkhpour

    2014-12-01

    Full Text Available Introduction: Developments in the field of information technology has profoundly affected our educational system. The efficacy of Computer-Assisted Learning (CAL has already been evaluated in medical education, but in this study, we examined the efficacy of CAL in combination with Lecture-Based Education.Methods: This quasi-experimental before and after study included 33 senior-year pharmacy students who had passed the preliminary hospital pharmacy internship course. Pre-test questionnaires were given to the students in order to examine their knowledge and attitudes. Then, three chemotherapy prescriptions were given to them. Pharmacology recourses also were available virtually. At the end, students were asked to answer post-test questionnaires with questions based upon knowledge and attitude.Results: The mean score of their knowledge was 3.48±2.04 of 20 before intervention and 17.82±2.31 of 20 after intervention. There was a statistically significant difference between the pre-test and post-testing scores (p<0.001. The mean attitude score of students before intervention was 42.48±15.59 (medium and their score after intervention was 75.97±21.03 (high. There was a statistically significant difference between pre-test and post-test results (p<0.000.Conclusion: The combination of Lecture-Based Education and Computer-Assisted Learning improved senior pharmacy students’ knowledge and attitude in hospital pharmacy internship course.

  2. Transfer function of Brazilian Portuguese oral vowels: a comparative acoustic analysis Função de transferência das vogais orais do Português brasileiro: análise acústica comparativa

    Maria Inês Rebelo Gonçalves

    2009-10-01

    Full Text Available The vocal tract transfers its characteristics onto the sounds produced at the glottis, depending on its tridimensional configuration. AIM: this study aims to determine which of the seven oral vowels in Brazilian Portuguese is acoustically less impacted by changes to the vocal tract. MATERIALS AND METHOD: this is a cross-sectional prospective study. Twenty-three males and 23 females with ages ranging between 20 and 45 years (mean values of 28.95 and 29.79 years respectively were enrolled in the study; none had voice complaints and their voices were normal under perceptive-auditory evaluation. Three-hundred and twenty-two sustained vocal emissions were digitized and acoustically analyzed by three computer programs combined. Results were compared against the distribution of resonance frequencies in a straight tube with one end sealed. RESULTS: statistical analysis showed that vowel /ε/ was significantly different when compared to the other vowels, with higher mean harmonic values and lower standard deviation for both genders. CONCLUSION: in Brazilian Portuguese, vowel /ε/ is less impacted by changes to the vocal tract and is significantly less attenuated in both genders. The inclusion of this vowel in voice assessment standard protocols may contribute to improve the quality of the information obtained as a result of quantitative spectrographic and acoustic tests.O trato vocal transfere suas características ao som produzido na glote, de acordo com sua configuração tridimensional. OBJETIVO: Determinar qual das sete vogais orais do Português brasileiro sofre a menor interferência acústica das modificações do trato vocal. MATERIAL E MÉTODO: Estudo transversal prospectivo. Os indivíduos foram 23 homens e 23 mulheres, na faixa etária entre 20 e 45 anos (médias de 28,95 e 29,79 respectivamente, sem queixas vocais e com qualidade vocal normal na avaliação perceptivo-auditiva. 322 emissões vocais sustentadas foram digitalizadas e analisadas

  3. Toward interactive context-aware affective educational recommendations in computer-assisted language learning

    Santos, Olga C.; Saneiro, Mar; Boticario, Jesus G.; Rodriguez-Sanchez, M. C.

    2016-01-01

    This work explores the benefits of supporting learners affectively in a context-aware learning situation. This features a new challenge in related literature in terms of providing affective educational recommendations that take advantage of ambient intelligence and are delivered through actuators available in the environment, thus going beyond previous approaches which provided computer-based recommendation that present some text or tell aloud the learner what to do. To address this open issue, we have applied TORMES elicitation methodology, which has been used to investigate the potential of ambient intelligence for making more interactive recommendations in an emotionally challenging scenario (i.e. preparing for the oral examination of a second language learning course). Arduino open source electronics prototyping platform is used both to sense changes in the learners' affective state and to deliver the recommendation in a more interactive way through different complementary sensory communication channels (sight, hearing, touch) to cope with a universal design. An Ambient Intelligence Context-aware Affective Recommender Platform (AICARP) has been built to support the whole experience, which represents a progress in the state of the art. In particular, we have come up with what is most likely the first interactive context-aware affective educational recommendation. The value of this contribution lies in discussing methodological and practical issues involved.

  4. MASCOT 6: a modern computer-assisted haptic tele-manipulator

    MASCOT is a two-armed master-slave tele-manipulator device with 7 degrees of freedom per arm. The master and slave movements are linked by force-reflecting servomechanisms, giving the operator a tactile sensation of doing the work. The slave is typically attached to a boom which transports it to the work area. The master is normally located in the control room from where the operator-controlled input actions provide the motion that the Mascot slave will replicate. MASCOT version 4.5 is currently in use at the Joint European Torus (JET) experimental nuclear fusion facility. Its role is to maintain the inside of the reactor vessel without the need for manned entry. The MASCOT-6 project, funded by EFDA, was initiated to address reliability and availability issues arising as a result of obsolete technologies. In particular, the Mascot actuators based around obsolete 2-phase AC induction motors are to be replaced with actuators based on commercial off-the-shelf (COTS) Permanent Magnet Synchronous Motors (PMSMs). As a consequence of its highly integrated, monolithic design, the entire Mascot 4.5 control system, including servo-amplifiers, controllers, control software and HMI (Human Machine Interface)needs to be redesigned. The MASCOT-6 control system is designed to maximise reliability, availability, maintainability, and inspectability (RAMI) of the system, as well as providing significant future-proofing. EtherCAT has been selected as a scalable, modular and extremely fast field-bus to provide communication between the control system and easily replaceable COTS servo drives. MASCOT-6 includes a high-level control system designed with modern software engineering practises in mind, and provides a modular, generic framework which can be extended to cater for any tele-operation or robotic system. Advanced Computer-Aided-Tele-operation features such as dynamic force compensation and load cancellation are presented. Communication between the MASCOT-6 control system and its

  5. ARGUMENTS ON USING COMPUTER-ASSISTED AUDIT TECHNIQUES (CAAT AND BUSINESS INTELLIGENCE TO IMPROVE THE WORK OF THE FINANCIAL AUDITOR

    Ciprian-Costel, MUNTEANU

    2014-11-01

    Full Text Available In the 21st century, one of the most efficient ways to achieve an independent audit and quality opinion is by using information from the organization database, mainly documents in electronic format. With the help of Computer-Assisted Audit Techniques (CAAT, the financial auditor analyzes part or even all the data about a company in reference to other information within or outside the entity. The main purpose of this paper is to show the benefits of evolving from traditional audit techniques and tools to modern and , why not, visionary CAAT, which are supported by business intelligence systems. Given the opportunity to perform their work in IT environments, the auditors would start using the tools of business intelligence, a key factor which contributes to making successful business decisions . CAAT enable auditors to test large amount of data quickly and accurately and therefore increase the confidence they have in their opinion.

  6. Application of audio computer-assisted self-interviews to collect self-reported health data: an overview.

    Brown, J L; Swartzendruber, A; DiClemente, R J

    2013-01-01

    For assessment of sensitive health behaviors (e.g., sexual behavior, violent behaviors, substance use), research is typically limited to an examination of self-reports of past behavior. Audio computer-assisted self-interviews (ACASI) may enhance the validity of self-report data in research and clinical settings by reducing measurement bias. This paper provides an introduction to ACASI for collection of self-reported health data. The potential benefits and cost-effectiveness of ACASI use in research and clinical settings are reviewed. We then review the theoretical underpinnings that may underlie differential reporting of health behaviors between assessment modalities. Next, we highlight studies that have investigated differences in self-reported health behaviors between assessment modalities. Lastly, we summarize potential applications of ACASI assessments within clinical settings. PMID:24107606

  7. The Application of Audio Computer-Assisted Self-Interviews (ACASI) to Collect Self-Reported Health Data: An Overview

    Brown, J. L.; Swartzendruber, A.; DiClemente, R. J.

    2015-01-01

    For assessment of sensitive health behaviors (e.g., sexual behavior, violent behaviors, substance use), research is typically limited to an examination of self-reports of past behavior. Audio computer-assisted self-interviews (ACASI) may enhance the validity of self-report data in research and clinical settings by reducing measurement bias. This paper provides an introduction to ACASI for collection of self-reported health data. The potential benefits and cost-effectiveness of ACASI use in research and clinical settings are reviewed. We then review the theoretical underpinnings that may underlie differential reporting of health behaviors between assessment modalities. Next, we highlight studies that have investigated differences in self-reported health behaviors between assessment modalities. Lastly, we summarize potential applications of ACASI assessments within clinical settings. PMID:24107606

  8. Xenon ventilation-perfusion lung scintigraphy immediately following technetium microsphere scanning: a computer-assisted background subtraction technique

    The conventional /sup 99m/Tc-albumin capillary blockade type of radionuclide lung scan suffers from a lack of sensitivity in identifying small perfusion defects and from an inability to distinguish between the various causes of perfusion defect. This paper presents a simple computer-assisted technique which allows a 133Xe ventilation-perfusion (V:Q) study to be performed immediately after the /sup 99m/Tc-albumin microsphere scans with the gamma camera optimally positioned over any defect that is seen. Crossover from the /sup 99m/Tc into the 133Xe window is subtracted from the xenon study by the computer. This procedure allows advantage to be taken of a unique character of the acute pulmonary embolus, namely an elevation of the V:Q ratio in the affected area of lung. In this way, the specificity of the lung scan can be increased for pulmonary embolism

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

    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 rigorous algorithm and syntax protocols together with imagination, communication, scientific applications and experimental innovation. The effectiveness of the curriculum was evaluated via statistical analysis of questionnaires, interview responses, the increase in student numbers majoring in physics, and performance in a competition. The results provide quantitative support that the curriculum remove huge barriers to programming which occur in text-based environments, helped students gain knowledge of programming and instrumentation, and increased the students' confidence and motivation to learn physics and computer languages.

  10. Computer assisted reconstruction of three-dimensional canal model of femur and design for custom-made stem

    刘建国; 李冬松; 马卫华; 周振平; 徐莘香

    2004-01-01

    @@ The maximum stem-cortical bone contact plays a dominant role in the long-term fixation of the prosthesis; narrowing stem-cortical bone space and the bony ingrowths reduces the reaction to debris due to wear, the particle flows caused by the wear debris, the bone resorption, and the growth of pseudomembrane.1-4 We realized that the endosteal contour varies significantly from person to person.5,6 Thus, only one common designed prosthesis is not sufficient to achieve a high degree of accuracy in terms of modelling the proximal femur, therefore computer-assisted reconstruction of a three-dimensional canal model of the femur is a very promising way to produce custom hip stem prostheses.7-9

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

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

    2016-06-01

    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 rigorous algorithm and syntax protocols together with imagination, communication, scientific applications and experimental innovation. The effectiveness of the curriculum was evaluated via statistical analysis of questionnaires, interview responses, the increase in student numbers majoring in physics, and performance in a competition. The results provide quantitative support that the curriculum remove huge barriers to programming which occur in text-based environments, helped students gain knowledge of programming and instrumentation, and increased the students' confidence and motivation to learn physics and computer languages.

  12. Computer assisted quantitative densitometric analysis of 125I-apamin binding sites in the central nervous system.

    Janicki, P K; Seibold, G; Siembab, D; Paulo, E A; Szreniawski, Z

    1989-01-01

    The binding sites for 125I-monoiododerivative of apamin in the central nervous system of rat, guinea-pig, chicken and frog were analysed and compared by computer assisted quantitative densitometric autoradiography on X-ray film. The highest level of binding sites in the rat and guinea-pig brain was found in the limbic-olfactory system and in the substantia gelatinosa of the spinal cord. In the chicken brain apamin binds preferentially to the tectum opticum and nuclei isthmi. In the frog brain no specific apamin binding sites were found. The role of presented topography for apamin binding sites is discussed in relation to neurotoxic properties of apamin. PMID:2641421

  13. Noninvasive CT to Iso-C3D registration for improved intraoperative visualization in computer assisted orthopedic surgery

    Rudolph, Tobias; Ebert, Lars; Kowal, Jens

    2006-03-01

    Supporting surgeons in performing minimally invasive surgeries can be considered as one of the major goals of computer assisted surgery. Excellent intraoperative visualization is a prerequisite to achieve this aim. The Siremobil Iso-C 3D has become a widely used imaging device, which, in combination with a navigation system, enables the surgeon to directly navigate within the acquired 3D image volume without any extra registration steps. However, the image quality is rather low compared to a CT scan and the volume size (approx. 12 cm 3) limits its application. A regularly used alternative in computer assisted orthopedic surgery is to use of a preoperatively acquired CT scan to visualize the operating field. But, the additional registration step, necessary in order to use CT stacks for navigation is quite invasive. Therefore the objective of this work is to develop a noninvasive registration technique. In this article a solution is being proposed that registers a preoperatively acquired CT scan to the intraoperatively acquired Iso-C 3D image volume, thereby registering the CT to the tracked anatomy. The procedure aligns both image volumes by maximizing the mutual information, an algorithm that has already been applied to similar registration problems and demonstrated good results. Furthermore the accuracy of such a registration method was investigated in a clinical setup, integrating a navigated Iso-C 3D in combination with an tracking system. Initial tests based on cadaveric animal bone resulted in an accuracy ranging from 0.63mm to 1.55mm mean error.

  14. Minimally invasive transforaminal lumbar interbody fusion aided with computer-assisted spinal navigation system combined with electromyography monitoring

    LUO Wei; ZHANG Fan; LIU Tie; DU Xing-li; CHEN An-ming; LI Feng

    2012-01-01

    Background Minimally invasive techniques are gaining wide-spread application in lumbar fusion surgery,because they may have advantage over conventional open surgery in approach-related morbidity.This research was aimed to evaluate the safety and accuracy of the techniques of minimally invasive transforaminal lumbar interbody fusion by using a computer-assisted spinal navigation system combined with electromyography monitoring.Methods Sixteen patients underwent minimally invasive transforaminal lumbar interbody fusion.A computer-assisted spinal navigation system and electromyography were used for guiding pedicle screw placement.The operative duration,blood loss,complications,and fluoroscopic time were recorded.Clinical outcome was assessed by Visual Analog Scale and Oswestry Disability Index.Radiographic images were obtained to evaluate the accuracy of pedicle screw placement and fusion rates.Results The Visual Analog Scale and Oswestry Disability Index scores were vastly improved postoperatively.A total of 64 pedicle screws were implanted and three were regarded as misplacement by post-operative CT scan.Three screw trajectories were adjusted according to intra-operative stimulus-evoked electromyography monitoring.The average fluoroscopy time in each patient was 31.8 seconds,which equals to 7.9 seconds per pedicle screw.No patients had instrument related neurological complications,infection,implant failure or revision.Successful fusion was found in all patients.Conclusions The combination of navigation system and real-time electromyography monitoring can make the minimally invasive operation more safe and accurate while decreasing radiation exposure time of the medical staff and patient and minimizing the chance and the degree of the pedicle screw misplacement.

  15. Oral Cancer

    ... TMJ Disorders Oral Cancer Dry Mouth Burning Mouth Tooth Decay See All Oral Complications of Systemic Diseases Cancer ... Puts Someone at Risk? Possible Signs & Symptoms Early Detection About Oral Cancer Oral cancer includes cancers of ...

  16. Oral Chemotherapy: What You Need to Know

    ... ACS » Your Local Offices Close + - Text Size Oral Chemotherapy: What You Need to Know There are many ... Symptoms of Cancer Treatments & Side Effects Cancer Facts & Statistics News About Cancer Expert Voices Blog Programs & Services ...

  17. The Effect of the Computer Assisted Instruction (CAI) on Student Attitude in Mathematics Teaching of Primary School 8th Class and Views of Students towards CAI

    Tuğba Hangül; Devrim Uzel

    2010-01-01

    The aim of this study is to research the effect of the subject of “Geometric Objects” which is included in mathematics curriculum at the eighth grade on the student attitude using computer assisted instruction (CAI) and find out grade 8 primary school students’ views about the computer-assisted instruction. In this study the pre-post attitude with experimental control group design was performed. The research was done under control and experiment groups consisting of fifty-three eighth grade s...

  18. What is needed to implement a computer-assisted health risk assessment tool? An exploratory concept mapping study

    Ahmad Farah

    2012-12-01

    Full Text Available Abstract Background Emerging eHealth tools could facilitate the delivery of comprehensive care in time-constrained clinical settings. One such tool is interactive computer-assisted health-risk assessments (HRA, which may improve provider-patient communication at the point of care, particularly for psychosocial health concerns, which remain under-detected in clinical encounters. The research team explored the perspectives of healthcare providers representing a variety of disciplines (physicians, nurses, social workers, allied staff regarding the factors required for implementation of an interactive HRA on psychosocial health. Methods The research team employed a semi-qualitative participatory method known as Concept Mapping, which involved three distinct phases. First, in face-to-face and online brainstorming sessions, participants responded to an open-ended central question: “What factors should be in place within your clinical setting to support an effective computer-assisted screening tool for psychosocial risks?” The brainstormed items were consolidated by the research team. Then, in face-to-face and online sorting sessions, participants grouped the items thematically as ‘it made sense to them’. Participants also rated each item on a 5-point scale for its ‘importance’ and ‘action feasibility’ over the ensuing six month period. The sorted and rated data was analyzed using multidimensional scaling and hierarchical cluster analyses which produced visual maps. In the third and final phase, the face-to-face Interpretation sessions, the concept maps were discussed and illuminated by participants collectively. Results Overall, 54 providers participated (emergency care 48%; primary care 52%. Participants brainstormed 196 items thought to be necessary for the implementation of an interactive HRA emphasizing psychosocial health. These were consolidated by the research team into 85 items. After sorting and rating, cluster analysis

  19. Efficient Vocational Skills Training for People with Cognitive Disabilities: An Exploratory Study Comparing Computer-Assisted Instruction to One-on-One Tutoring

    Larson, James R., Jr.; Juszczak, Andrew; Engel, Kathryn

    2016-01-01

    Background: This study compared the effectiveness of computer-assisted instruction to that of one-on-one tutoring for teaching people with mild and moderate cognitive disabilities when both training methods are designed to take account of the specific mental deficits most commonly found in cognitive disability populations. Method: Fifteen…

  20. Computer-Assisted Mandibular Reconstruction using a Patient-Specific Reconstruction Plate Fabricated with Computer-Aided Design and Manufacturing Techniques

    Wilde, Frank; Cornelius, Carl-Peter; Schramm, Alexander

    2014-01-01

    We investigated the workflow of computer-assisted mandibular reconstruction that was performed with a patient-specific mandibular reconstruction plate fabricated with computer-aided design and computer-aided manufacturing (CAD/CAM) techniques and a fibula flap. We assessed the feasibility of this technique from virtual planning to the completion of surgery.

  1. The Effects of a Computer-Assisted Instruction Program on Peer Acceptance, Teacher Acceptance, and Self-Concept of Mildly Handicapped Students.

    Leles, Sam; Culliver, Concetta C.

    A study was undertaken to determine the effects of a computer-assisted instruction (CAI) program on the self-concept of mainstreamed, mildly handicapped fifth-grade students (labeled learning disabled, emotionally conflicted, and educable mentally retarded) attending 13 different elementary schools in Tuscaloosa County, Alabama. A control group…

  2. Acceptance, Communication Mode and Use of Audio Computer-Assisted Self Interview Using Touchscreen to Identify Risk Factors among Pregnant Minority Women

    Thornberry, Jutta S.; Murray, Kennan B; El-Khorazaty, M. Nabil; Kiely, Michele

    2010-01-01

    This paper evaluates the acceptability, communication mode and use of audio computer-assisted self-interview (A-CASI) among minority pregnant women receiving prenatal care in six Washington, DC sites. A total of 2,913 women were screened for demographic eligibility (18+ years old,

  3. A Different Approach to Have Science and Technology Student-Teachers Gain Varied Methods in Laboratory Applications: A Sample of Computer Assisted POE Application

    Saka, Arzu

    2012-01-01

    The purpose of this study is to develop a new approach and assess the application for the science and technology student-teachers to gain varied laboratory methods in science and technology teaching. It is also aimed to describe the computer-assisted POE application in the subject of "Photosynthesis-Light" developed in the context of this approach…

  4. Assessing the Effectiveness of Two Theoretically Motivated Computer-Assisted Reading Interventions in the United Kingdom: GG Rime and GG Phoneme

    Kyle, Fiona; Kujala, Janne; Richardson, Ulla; Lyytinen, Heikki; Goswami, Usha

    2013-01-01

    We report an empirical comparison of the effectiveness of two theoretically motivated computer-assisted reading interventions (CARI) based on the Finnish GraphoGame CARI: English GraphoGame Rime (GG Rime) and English GraphoGame Phoneme (GG Phoneme). Participants were 6-7-year-old students who had been identified by their teachers as being…

  5. Development and Initial Psychometric Properties of the Computer Assisted Maltreatment Inventory (CAMI): A Comprehensive Self-Report Measure of Child Maltreatment History

    DiLillo, David; Hayes-Skelton, Sarah A.; Fortier, Michelle A.; Perry, Andrea R.; Evans, Sarah E.; Messman Moore, Terri L.; Walsh, Kate; Nash, Cindy; Fauchier, Angele

    2010-01-01

    Objectives: The present study reports on the development and initial psychometric properties of the Computer Assisted Maltreatment Inventory (CAMI), a web-based self-report measure of child maltreatment history, including sexual and physical abuse, exposure to interparental violence, psychological abuse, and neglect. Methods: The CAMI was…

  6. Evaluation of the TSC Dolphin Computer Assisted Instructional System in the Chapter 1 Program of the District of Columbia Public Schools. Final Report 85-9.

    Harris, Carolyn DeMeyer; And Others

    Dolphin is a computer-assisted instruction system used to teach and reinforce skills in reading, language arts, and mathematics. An evaluation of this system was conducted to provide information to TSC Division of Houghton Mifflin regarding its effectiveness and possible modifications to the system. The general design of the evaluation was to…

  7. Digit ratios by computer-assisted analysis confirm lack of anatomical evidence of prenatal androgen exposure in clinical phenotypes of polycystic ovary syndrome

    Lehotay Denis C

    2010-12-01

    Full Text Available Abstract Background We recently showed that women with four clinical phenotypes of polycystic ovary syndrome (PCOS do not demonstrate anatomical evidence of elevated prenatal androgen exposure as judged by a lower ratio of the index (2D to ring (4D finger. However, those findings conflicted with a previous study where women with PCOS had lower right hand 2D:4D compared to healthy female controls. Both these studies used Vernier calipers to measure finger lengths - a method recently shown to be less reliable at obtaining finger length measurements than computer-assisted analysis. Methods Ninety-six women diagnosed with PCOS according to the 2003 Rotterdam criteria had their finger lengths measured with computer-assisted analysis. Participants were categorized into four recognized phenotypes of PCOS and their 2D:4D compared to healthy female controls (n = 48 and men (n = 50. Results Digit ratios assessed by computer-assisted analysis in women with PCOS did not differ from female controls, but were significantly lower in men. When subjects were stratified by PCOS phenotype, 2D:4D did not differ among phenotypes or when compared to female controls. Conclusion Computer-assisted measurements validated that digit ratios of women with PCOS do not show anatomical evidence of increased prenatal androgen exposure.

  8. Computer-Assisted Learning Design for Reflective Practice Supporting Multiple Learning Styles for Education and Training in Pre-Hospital Emergency Care.

    Jones, Indra; Cookson, John

    2001-01-01

    Students in paramedic education used a model combining computer-assisted instruction (CAI), reflective practice, and learning styles. Although reflective practice normally requires teacher-student interaction, CAI with reflective practice embedded enabled students to develop learning style competencies and achieve curricular outcomes. (SK)

  9. An Investigation of the Relationship between College Chinese EFL Students' Autonomous Learning Capacity and Motivation in Using Computer-Assisted Language Learning

    Pu, Minran

    2009-01-01

    The purpose of the study was to investigate the relationship between college EFL students' autonomous learning capacity and motivation in using web-based Computer-Assisted Language Learning (CALL) in China. This study included three questionnaires: the student background questionnaire, the questionnaire on student autonomous learning capacity, and…

  10. Programmed Instruction and Computer Assisted Instruction in Adult Basic Education: An Institute for State and University Level Adult Basic Education Personnel.

    Collings, Mary Louise, Ed.

    An Institute for State and University Level Adult Basic Education Personnel was held to provide insight into the philosophy, potentials, problems, and techniques of programmed and computer assisted instruction as they relate to adult basic education programs. Speeches given at the institute are reproduced in this publication. The titles and…

  11. In Situ Ecophysiology of Microbial Biofilm Communities Analyzed by CMEIAS Computer-Assisted Microscopy at Single-Cell Resolution

    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.

  12. IMPACT OF USING COMPUTER ASSISTED LEARNING IN II MBBS PHARMACOLOGY TEACHING - PERCEPTIONS OF STUDENTS IN A MEDICAL COLLEGE

    Veena

    2015-10-01

    Full Text Available BACKGROUND: Animal experiments are essential as per II year MBBS practical syllabus for learning basic concepts in Pharmacology. Due to the strict regulations and ethical issues in procurement of animals related to their use, a need was felt to design and develop computer based simulation software as an alternative to animal use. It is a group learning technique used offline or online involving interaction of the student with programmed instructional materials or through it with teacher. These integrated multimedia software's act as animal simulators provide an environment that closely mimics reality. OBJECTIVES: The aim of this study is to assess the students opinions on the interactive computer assisted learning (CAL in Pharmacology practical experiments. MATERIALS AND METHODS: This is an observational questionnaire based study. Seventy seven (77 II-year MBBS students at BGSGIMS attended the practical's and filled a survey questionnaire on the outcomes, advantages and disadvantages of the CAL session using a 5-point Likert scale. RESULTS: More than 90% of II MBBS students find that CAL helped them to achieve the learning objectives, enriches and personalizes the learning experience at their own pace within the time slot. CAL helped students recollect and apply theoretical knowledge of drugs in practical session. CONCLUSION: Learning basic concepts in Pharmacology using CAL, animal simulation software as an education tool has been perceived positively by II MBBS students. CAL program coupled with application of theoretical knowledge of drugs to the practical classes helped them to fulfil the learning outcomes.

  13. Computer-assisted cartography using topographic properties: precision and accuracy of local soil maps in central Mexico

    Gustavo Cruz-Cárdenas

    2011-06-01

    Full Text Available Map units directly related to properties of soil-landscape are generated by local soil classes. Therefore to take into consideration the knowledge of farmers is essential to automate the procedure. The aim of this study was to map local soil classes by computer-assisted cartography (CAC, using several combinations of topographic properties produced by GIS (digital elevation model, aspect, slope, and profile curvature. A decision tree was used to find the number of topographic properties required for digital cartography of the local soil classes. The maps produced were evaluated based on the attributes of map quality defined as precision and accuracy of the CAC-based maps. The evaluation was carried out in Central Mexico using three maps of local soil classes with contrasting landscape and climatic conditions (desert, temperate, and tropical. In the three areas the precision (56 % of the CAC maps based on elevation as topographical feature was higher than when based on slope, aspect and profile curvature. The accuracy of the maps (boundary locations was however low (33 %, in other words, further research is required to improve this indicator.

  14. Development and use of touch-screen audio computer-assisted self-interviewing in a study of American Indians.

    Edwards, Sandra L; Slattery, Martha L; Murtaugh, Maureen A; Edwards, Roger L; Bryner, James; Pearson, Mindy; Rogers, Amy; Edwards, Alison M; Tom-Orme, Lillian

    2007-06-01

    This article describes the development and usability of an audio computer-assisted self-interviewing (ACASI) questionnaire created to collect dietary, physical activity, medical history, and other lifestyle data in a population of American Indians. Study participants were part of a cohort of American Indians living in the southwestern United States. Data were collected between March 2004 and July 2005. Information for evaluating questionnaire usability and acceptability was collected from three different sources: baseline study data, auxiliary background data, and a short questionnaire administered to a subset of study participants. For the subset of participants, 39.6% reported not having used a computer in the past year. The ACASI questionnaires were well accepted: 96.0% of the subset of participants reported finding them enjoyable to use, 97.2% reported that they were easy to use, and 82.6% preferred them for future questionnaires. A lower educational level and infrequent computer use in the past year were predictors of having usability trouble. These results indicate that the ACASI questionnaire is both an acceptable and a preferable mode of data collection in this population. PMID:17379618

  15. A new approach of building 3D visualization framework for multimodal medical images display and computed assisted diagnosis

    Li, Zhenwei; Sun, Jianyong; Zhang, Jianguo

    2012-02-01

    As more and more CT/MR studies are scanning with larger volume of data sets, more and more radiologists and clinician would like using PACS WS to display and manipulate these larger data sets of images with 3D rendering features. In this paper, we proposed a design method and implantation strategy to develop 3D image display component not only with normal 3D display functions but also with multi-modal medical image fusion as well as compute-assisted diagnosis of coronary heart diseases. The 3D component has been integrated into the PACS display workstation of Shanghai Huadong Hospital, and the clinical practice showed that it is easy for radiologists and physicians to use these 3D functions such as multi-modalities' (e.g. CT, MRI, PET, SPECT) visualization, registration and fusion, and the lesion quantitative measurements. The users were satisfying with the rendering speeds and quality of 3D reconstruction. The advantages of the component include low requirements for computer hardware, easy integration, reliable performance and comfortable application experience. With this system, the radiologists and the clinicians can manipulate with 3D images easily, and use the advanced visualization tools to facilitate their work with a PACS display workstation at any time.

  16. Computer-assisted minimally invasive spine surgery for resection of ossification of the ligamentum flavum in the thoracic spine

    Yuan Qiang; Zheng Shan; Tian Wei

    2014-01-01

    Background Ossification of the ligamentum flavum (OLF) has been widely recognized as one of the main causes of thoracic spinal canal stenosis and thoracic myelopathy.Decompression is the only effective strategy for treating thoracic myelopathy caused by OLF.The purpose of this study was to describe the clinical outcomes of computer-assisted minimally invasive spine surgery (CAMISS) for posterior decompression in patients with thoracic myelopathy caused by OLF.Methods In all cases,the surgical procedure was performed with the assistance of an intraoperative three-dimensional navigation system.Decompression of the spinal cord was performed with a high-speed drill; the supraspinal ligaments and spinous process were partially preserved.The outcomes were evaluated by a modified Japanese Orthopedic Association (JOA) scoring system and recovery rates.Results The mean duration of follow-up for the 14 cases was 3.9 years.All patients experienced neurological recovery,the mean JOA score improving from 6.1 points preoperatively to 8.6 points at final follow-up and the mean rate of recovery being 52.7% (excellent in two cases,good in eight,fair in three,and unchanged in one).Conclusion CAMISS is a safe and effective procedure for resection of the OLF in the thoracic spine.

  17. The Effects of Computer-assisted Pronunciation Readings on ESL Learners’ Use of Pausing, Stress, Intonation, and Overall Comprehensibility

    Mark Tanner

    2001-10-01

    Full Text Available With research showing the benefits of pronunciation instruction aimed at suprasegmentals (Derwing, Munro, & Wiebe, 1997, 1998; Derwing & Rossiter, 2003; Hahn, 2004; McNerney and Mendelsohn, 1992, more materials are needed to provide learners opportunities for self-directed practice. A 13-week experimental study was performed with 75 ESL learners divided into control and treatment groups. The treatment group was exposed to 11 weeks of self-directed computer-assisted practice using Cued Pronunciation Readings (CPRs. In the quasi-experimental pre-test/post-test design, speech perception and production samples were collected at Time 1 (week one of the study and Time 2 (week 13. Researchers analyzed the treatment’s effect on the learners’ perception and production of key suprasegmental features (pausing, word stress, and sentence-final intonation, and the learners’ level of perceived comprehensibility. Results from the statistical tests revealed that the treatment had a significant effect on learners’ perception of pausing and word stress and controlled production of stress, even with limited time spent practicing CPRs in a self-directed environment.

  18. Computer-assisted analysis of Fourier Transform Infrared (FTIR spectra for characterization of various treated and untreated agriculture biomass

    Siong Fong Sim

    2012-11-01

    Full Text Available A computational approach was used to analyze the FTIR spectra of a wide range of treated and untreated lignocellulosic biomass (coconut husk, banana trunk, sago hampas, rice husk, and empty fruit bunch. The biomass was treated with strong sulphuric acid and NaOH, respectively. A total of 87 spectra were obtained in which the absorption bands were de-convoluted automatically, generating a peak table of 87 rows and 60 columns. Square roots were taken of the peak values, with further standardization prior to Principal Component Analysis (PCA for data exploration. In a scores plot, the treated and untreated biomass were distinguishable along the two main axes, PC1 and PC2. Examining the absorption bands corresponding to lignocellulosic components indicated that the acid pretreatment had resulted in dissolution and degradation of hemicelluloses and lignin, confirmed typically by disappearance of bands. The alkali treatment however was not as rigorous as the acid treatment, as some characteristic bands of hemicelluloses and lignin were enhanced, suggesting condensation of the degraded polysaccharides. The computer-assisted analysis of the FTIR spectra allowed efficient and simultaneous comparisons of lignocellulosic compositions present in various treated and untreated biomass. This represents an improvement relative to the conventional methods, since a large dataset can be handled efficiently and individual peaks can be examined.

  19. Assessing knowledge of human papillomavirus and collecting data on sexual behavior: computer assisted telephone versus face to face interviews

    Garland Suzanne

    2009-11-01

    Full Text Available Abstract Background Education campaigns seeking to raise awareness of human papillomavirus (HPV and promoting HPV vaccination depend on accurate surveys of public awareness and knowledge of HPV and related sexual behavior. However, the most recent population-based studies have relied largely on computer-assisted telephone interviews (CATI as opposed to face to face interviews (FTFI. It is currently unknown how these survey modes differ, and in particular whether they attract similar demographics and therefore lead to similar overall findings. Methods A comprehensive survey of HPV awareness and knowledge, including sexual behavior, was conducted among 3,045 Singaporean men and women, half of whom participated via CATI, the other half via FTFI. Results Overall levels of awareness and knowledge of HPV differed between CATI and FTFI, attributable in part to demographic variations between these survey modes. Although disclosure of sexual behavior was greater when using CATI, few differences between survey modes were found in the actual information disclosed. Conclusion Although CATI is a cheaper, faster alternative to FTFI and people appear more willing to provide information about sexual behavior when surveyed using CATI, thorough assessments of HPV awareness and knowledge depend on multiple survey modes.

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

    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.

  1. Intraoperative accuracy evaluation of virtual fluoroscopy--a method for application in computer-assisted distal locking.

    Suhm, N

    2001-01-01

    Virtual fluoroscopy integrates intraoperative C-arm fluoroscopy as an imaging modality for surgical navigation. In the operating room, the conditions for application of virtual fluoroscopy may be impaired. In such situations, the surgeon is interested in an intraoperative check to decide whether the accuracy available is sufficient to perform the scheduled procedure. The test principle is to include an artificial landmark within the fluoroscopic images acquired for virtual fluoroscopy. As this landmark is fixed outside the patient, it can be touched with the referenced tool prior to performing the procedure. A mismatch between the actual tool position at the landmark and the virtual tool position as visualized on the computer screen allows estimation of the system's accuracy. The principle described was designed for detection of inaccuracies resulting from input of nonoptimal data to the navigation system. The method was successfully applied during computer-assisted distal locking of intramedullary implants, and the test principle might be adapted for other applications of virtual fluoroscopy. PMID:11835618

  2. Oral cancer

    ... the immune system (immunosuppressants) Poor dental and oral hygiene Some oral cancers begin as a white plaque ( leukoplakia ) or ... use Visiting the dentist regularly and practicing good oral hygiene

  3. Computer assisted physics education

    Semrád, Petr

    2012-01-01

    This thesis deals with the theme of "Computer-aided teaching of physics". It provides an overview of modern material and non-material resources for teaching. It deals with an overview of basic digital techniques. It briefly describes the data projectors, audiovisual equipment and an interactive whiteboard. It features an overview of software for teaching and its application. It deals with using computer technology for verification and testing of knowledge during examinations. It shows the use...

  4. Computer assisted radiology

    The organization of the book follows the plan of the meeting, with chapters representing the general meeting sessions and articles representing the meeting presentations. These are grouped by modality or kindred application, where relevant. Some sessions are not similarly divided and individual papers are positioned, presumably, in order of presentation. Each section labeled workshop addresses a specific topic. The first session is on digital image generation and contains sections on magnetic resonance imaging, nuclear medicine, computed tomography, ultrasound, digital radiography, and digital subtraction and angiography. The remaining sections are on application programming, picture archiving and communications systems, computer graphics, and computer vision

  5. Computer-assisted instruction

    J. Voogt; P. Fisser

    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

  6. Computer Assisted Audit Techniques

    2007-01-01

    Today, the environment based on informatics influences continuously auditors’ work, because it creates new opportunities and new risks, additional rules in what concerns security, fairness and acceptable margin of error. The growth of the systems’ complexity, especially the informatics accounting Systems of ERP type (Enterprise Resource Planning), so as the large volume of transactions registered at present have lead to the replacement of the „manual”, classic audit techniques with modern tec...

  7. Audio computer-assisted survey instrument versus face-to-face interviews: optimal method for detecting high-risk behaviour in pregnant women and their sexual partners in the south of Brazil

    Yeganeh, N; Dillavou, C; Simon, M; Gorbach, P; Santos, B; Fonseca, R; Saraiva, J; Melo, M; Nielsen-Saines, K

    2016-01-01

    Summary Audio computer-assisted survey instrument (ACASI) has been shown to decrease under-reporting of socially undesirable behaviours, but has not been evaluated in pregnant women at risk of HIV acquisition in Brazil. We assigned HIV-negative pregnant women receiving routine antenatal care at in Porto Alegre, Brazil and their partners to receive a survey regarding high-risk sexual behaviours and drug use via ACASI (n = 372) or face-to-face (FTF) (n = 283) interviews. Logistic regression showed that compared with FTF, pregnant women interviewed via ACASI were significantly more likely to self-report themselves as single (14% versus 6%), having >5 sexual partners (35% versus 29%), having oral sex (42% versus 35%), using intravenous drugs (5% versus 0), smoking cigarettes (23% versus 16%), drinking alcohol (13% versus 8%) and using condoms during pregnancy (32% versus 17%). Therefore, ACASI may be a useful method in assessing risk behaviours in pregnant women, especially in relation to drug and alcohol use. PMID:23970659

  8. Technical progress, the concept of individualized cancer treatment and the innovation of computer-assisted radiotherapy planning

    After a first step of cancerogenesis, the further development of the tumor is an individual process. At the end of this process the tumor is formed as an individual in the individual. The individuality of cancer exists on the level of organs, tissues and cells and includes an individual tumor-host relationship. Today, optimized cancer treatment requires a most precise biological characterization possible of the tumor and of the tumor-host relationship, which will provide objective information about the individual character of every tumor. Routine analysis and strict therapeutic consideration of the clinical and biological individuality of human cancer can offer real chances for the improvement of cancer treatment. A routine acquisition of individual tumor characteristics will be possible only if methods and equipment are available for the registration of suitable parameters. In this context technical innovations have an essential influence on the realization of the concept of individualized cancer treatment. With the method of flow cytophotometry and other techniques examples are given in how far the ideas of individual cancer management can be realized by introduction of new technical solutions into medical research and clinical practice. Unfortunately there is still a lack of methodology in individualizing cancer treatment. The individualization of radiotherapy is connected to an extremely high degree of technical innovations. Particularly this refers to the topometrical description of the target volume in relation to the adjacent anatomical structures and the body contour as well as the fitting of isodoses to the shape and size of the target volume. As an example of innovation of a technical solution for individual radiotherapy planning the computer-assisted radiotherapy planning system DOPSY is described. (author)

  9. Comparison of walking overground and in a Computer Assisted Rehabilitation Environment (CAREN in individuals with and without transtibial amputation

    Gates Deanna H

    2012-11-01

    Full Text Available Abstract Background Due to increased interest in treadmill gait training, recent research has focused on the similarities and differences between treadmill and overground walking. Most of these studies have tested healthy, young subjects rather than impaired populations that might benefit from such training. These studies also do not include optic flow, which may change how the individuals integrate sensory information when walking on a treadmill. This study compared overground walking to treadmill walking in a computer assisted virtual reality environment (CAREN in individuals with and without transtibial amputations (TTA. Methods Seven individuals with traumatic TTA and 27 unimpaired controls participated. Subjects walked overground and on a treadmill in a CAREN at a normalized speed. The CAREN applied optic flow at the same speed that the subject walked. Temporal-spatial parameters, full body kinematics, and kinematic variability were collected during all trials. Results Both subject groups decreased step time and control subjects decreased step length when walking in the CAREN. Differences in lower extremity kinematics were small (○ and did not exceed the minimal detectable change values for these measures. Control subjects exhibited decreased transverse and frontal plane range of motion of the pelvis and trunk when walking in the CAREN, while patients with TTA did not. Both groups exhibited increased step width variability during treadmill walking in the CAREN, but only minor changes in kinematic variability. Conclusions The results of this study suggest that treadmill training in a virtual environment should be similar enough to overground that changes should carry over. Caution should be made when comparing step width variability and step time results from studies utilizing a treadmill to those overground.

  10. Computer-Assisted Drug Design: Genetic Algorithms and Structures of Molecular Clusters of Aromatic Hydrocarbons and Actinomycin D-Deoxyguanosine

    Xiao, Yong Liang

    Molecular packing, clustering, and docking computations have been performed by empirical intermolecular energy minimization methods. The main focus of this study is finding a robust global search algorithm to solve intermolecular interaction problems, especially to apply an efficient algorithm to large-scale complex molecular systems such as drug-DNA binding or site selectivity which has increasing importance in drug design and drug discovery. Molecular packing in benzene, naphthalene, and anthracene crystals is analyzed in terms of molecular dimer interaction. Intermolecular energies of the gas dimer molecules are calculated for various intermolecular distances and orientations using empirical potential energy functions. The gas dimers are compared to pairs of molecules extracted from the observed crystal structures. Net atomic charges are obtained by the potential-derived method from 6-31G and 6-31G^{**} level ab initio wavefunctions. A new approach using a genetic algorithm is applied to predict structures of benzene, naphthalene, and anthracene molecular clusters. The computer program GAME (genetic algorithm for minimization of energy) has been developed to obtain the global energy minimum of clusters of dimer, trimer, and tetramer molecules. This test model has been further developed to applications of molecular docking. Docking calculations of deoxyguanosine molecules to actinomycin D were performed successfully to identify the binding sites of the drug molecule, which was revealed by actinomycin D-deoxyguanosine complex from the solved x-ray crystal structure. The comparison between the evolutionary computing method and conventional local optimization methods concluded that genetic algorithms are very competitive when it comes to complex, large-scale optimization. Full power of genetic algorithms can be unveiled in computer-assisted drug design only when the difficulties of including optimized molecular conformation in the algorithm are overcome. These

  11. Computer-assisted teaching of skin flap surgery: validation of a mobile platform software for medical students.

    David P de Sena

    Full Text Available The purpose of this study was to develop and validate a multimedia software application for mobile platforms to assist in the teaching and learning process of design and construction of a skin flap. Traditional training in surgery is based on learning by doing. Initially, the use of cadavers and animal models appeared to be a valid alternative for training. However, many conflicts with these training models prompted progression to synthetic and virtual reality models. Fifty volunteer fifth- and sixth-year medical students completed a pretest and were randomly allocated into two groups of 25 students each. The control group was exposed for 5 minutes to a standard text-based print article, while the test group used multimedia software describing how to fashion a rhomboid flap. Each group then performed a cutaneous flap on a training bench model while being evaluated by three blinded BSPS (Brazilian Society of Plastic Surgery board-certified surgeons using the OSATS (Objective Structured Assessment of Technical Skill protocol and answered a post-test. The text-based group was then tested again using the software. The computer-assisted learning (CAL group had superior performance as confirmed by checklist scores (p<0.002, overall global assessment (p = 0.017 and post-test results (p<0.001. All participants ranked the multimedia method as the best study tool. CAL learners exhibited better subjective and objective performance when fashioning rhomboid flaps as compared to those taught with standard print material. These findings indicate that students preferred to learn using the multimedia method.

  12. Potential of a suite of robot/computer-assisted motivating systems for personalized, home-based, stroke rehabilitation

    Feng Xin

    2007-03-01

    Full Text Available Abstract Background There is a need to improve semi-autonomous stroke therapy in home environments often characterized by low supervision of clinical experts and low extrinsic motivation. Our distributed device approach to this problem consists of an integrated suite of low-cost robotic/computer-assistive technologies driven by a novel universal access software framework called UniTherapy. Our design strategy for personalizing the therapy, providing extrinsic motivation and outcome assessment is presented and evaluated. Methods Three studies were conducted to evaluate the potential of the suite. A conventional force-reflecting joystick, a modified joystick therapy platform (TheraJoy, and a steering wheel platform (TheraDrive were tested separately with the UniTherapy software. Stroke subjects with hemiparesis and able-bodied subjects completed tracking activities with the devices in different positions. We quantify motor performance across subject groups and across device platforms and muscle activation across devices at two positions in the arm workspace. Results Trends in the assessment metrics were consistent across devices with able-bodied and high functioning strokes subjects being significantly more accurate and quicker in their motor performance than low functioning subjects. Muscle activation patterns were different for shoulder and elbow across different devices and locations. Conclusion The Robot/CAMR suite has potential for stroke rehabilitation. By manipulating hardware and software variables, we can create personalized therapy environments that engage patients, address their therapy need, and track their progress. A larger longitudinal study is still needed to evaluate these systems in under-supervised environments such as the home.

  13. Performance gain in computer-assisted detection schemes by averaging scores generated from artificial neural networks with adaptive filtering

    The authors investigated a new method to optimize artificial neural networks (ANNs) with adaptive filtering used in computer-assisted detection schemes in digitized mammograms and to assess performance changes when averaging classification scores from three sets of optimized schemes. Two independent training and testing image databases involving 978 and 830 digitized mammograms, respectively, were used in this study. In the training data set, initial filtering and subtraction resulted in the identification of 592 mass regions and 3790 suspicious, but actually negative regions. These regions (including both true-positive and negative regions) were segmented into three subsets three times based on the calculation of the values of three features as segmentation indices. The indices were 'mass' size multiplied by their digital value contrast, conspicuity, and circularity. Nine ANN-based classifiers were separately optimized using a genetic algorithm for each subset of regions. Each region was assigned three classification scores after applying the three adaptive ANNs. The performance gain of the CAD scheme after averaging the three scores for each suspicious region was tested using an independent data set and a ROC methodology. The experimental results showed that the areas under ROC curves (Az) for the testing database using three sets of optimized ANNs individually were 0.84±0.01, 0.83±0.01, and 0.84±0.01, respectively. The between-index correlations of three Az values were 0.013, -0.007, and 0.086. Similar to averaging diagnostic ratings from independent observers, by averaging three ANN-generated scores for each testing region, the performance of the CAD scheme was significantly improved (pz value of 0.95±0.01

  14. Quantitative Enzymatic and Immunologic Histophotometry of Diseased Human Kid-Ney Tissues Using Tv-Camera and Computer Assisted Image Processing Systems.

    Heinert, G.; Mondorf, W.

    1982-11-01

    High speed image processing was used to analyse morphologic and metabolic characteristics of clinically relevant kidney tissue alterations.Qualitative computer-assisted histophotometry was performed to measure alterations in levels of the enzymes alkaline phosphatase (Ap),alanine aminopeptidase (AAP),g-glutamyltranspepti-dase (GGTP) and A-glucuronidase (B-G1) and AAP and GGTP immunologically determined in prepared renal and cancer tissue sections. A "Mioro-Videomat 2" image analysis system with a "Tessovar" macroscope,a computer-assisted "Axiomat" photomicroscope and an "Interactive Image Analysis System (IBAS)" were employed for analysing changes in enzyme activities determined by changes in absorbance or transmission.Diseased kidney as well as renal neoplastic tissues could be distinguished by significantly (wilcoxon test,phuman kidney tissues.This image analysis techniques might be of potential use in diagnostic and prognostic evaluation of renal cancer and diseased kidney tissues.

  15. A Comparison of Audio Computer-Assisted Self-Interviews to Face-to-Face Interviews of Sexual Behavior Among Perinatally HIV-Exposed Youth

    Dolezal, Curtis; Marhefka, Stephanie L; Santamaria, E. Karina; Leu, Cheng-Shiun; Brackis-Cott, Elizabeth; Mellins, Claude Ann

    2011-01-01

    Computer-assisted interview methods are increasingly popular in the assessment of sensitive behaviors (e.g., substance abuse and sexual behaviors). It has been suggested that the effect of social desirability is diminished when answering via computer, as compared to an interviewer-administered face-to-face (FTF) interview, although studies exploring this hypothesis among adolescents are rare and yield inconsistent findings. This study compared two interview modes among a sample of urban, ethn...

  16. Validity of a computer-assisted manual segmentation software to quantify wrist erosion volume using computed tomography scans in rheumatoid arthritis

    Salaffi, Fausto; Carotti, Marina; Ciapetti, Alessandro; Ariani, Alarico; Gasparini, Stefania; Grassi, Walter

    2013-01-01

    Background To investigate the performance of conventional radiography (CR) for the detection of bone erosions of wrist in rheumatoid arthritis (RA) using multidetector computed tomography (CT) as the reference method and to evaluate the validity of a computer-assisted manual segmentation (outlining) technique to quantify erosion volume on CT scans. Methods Twenty five RA patients and six controls underwent CT and radiographic evaluation of the dominant wrist on the same day. CT was performed ...

  17. Computer-Assisted Radiographic Calculation of Spinal Curvature in Brachycephalic “Screw-Tailed” Dog Breeds with Congenital Thoracic Vertebral Malformations: Reliability and Clinical Evaluation

    Guevar, Julien; Penderis, Jacques; Faller, Kiterie; Yeamans, Carmen; Stalin, Catherine; Gutierrez Quintana, Rodrigo

    2014-01-01

    The objectives of this study were: To investigate computer-assisted digital radiographic measurement of Cobb angles in dogs with congenital thoracic vertebral malformations, to determine its intra- and inter-observer reliability and its association with the presence of neurological deficits. Medical records were reviewed (2009–2013) to identify brachycephalic screw-tailed dog breeds with radiographic studies of the thoracic vertebral column and with at least one vertebral malformation present...

  18. Does Modality of Survey Administration Impact Data Quality: Audio Computer Assisted Self Interview (ACASI) Versus Self-Administered Pen and Paper?

    William M Reichmann; Elena Losina; Seage, George R.; Christian Arbelaez; Safren, Steven A.; Katz, Jeffrey N; Adam Hetland; Walensky, Rochelle P.

    2010-01-01

    BACKGROUND: In the context of a randomized controlled trial (RCT) on HIV testing in the emergency department (ED) setting, we evaluated preferences for survey modality and data quality arising from each modality. METHODS: Enrolled participants were offered the choice of answering a survey via audio computer assisted self-interview (ACASI) or pen and paper self-administered questionnaire (SAQ). We evaluated factors influencing choice of survey modality. We defined unusable data for a particula...

  19. Quality Computer Assisted Mobile Learning (CAML) and Distance Education Leadership in Managing Technology Enhanced Learning Management System (TELMS) in the Malaysian Public Tertiary Education

    Lee Tan Luck

    2009-01-01

    Abstract - The success in the implementation of a quality computer assisted mobile learning and distance education in a Technology Enhanced Learning Management System is highly rely on the academic leadership in managing and application of Information and Communication Technology (ICT) in the tertiary level. The effectiveness of its leadership, knowledge, application and management of ICT and learning management system is of utmost important. Successful application and management includes qua...

  20. Learner Autonomy in Computer-Assisted Language Learning. A comparative case-study of learners' behaviours in the English as a Foreign Language Context

    Ruiz Madrid, María Noelia

    2005-01-01

    This dissertation investigates the relationship between Computer-Assisted Language Learning (CALL) and language-learning approaches. In this sense, Language Learning Autonomy (LLA) seems to be the most preferred candidate by researchers in order to become the suitable approach in order to make the most out of technology (Blin, 1999; Little, 2001; Littlemore, 2003; The European Directorate General of Education and Culture, 2003; sanz, 2003; Villanueva, 2003). The increasing research on this sp...

  1. Predictive value of sperm motility characteristics assessed by computer-assisted sperm analysis in intrauterine insemination with superovulation in couples with unexplained infertility

    Youn, Joung Sub; Cha, Sun Hwa; Park, Chan Woo; Yang, Kwang Moon; Kim, Jin Yeong; Koong, Mi Kyoung; Kang, Inn Soo; Song, In Ok; Han, Sang Chul

    2011-01-01

    Objective To determine whether characteristics of sperm motility obtained by computer-assisted sperm analysis (CASA) could predict pregnancy after intrauterine insemination (IUI) in couples with unexplained infertility. Methods Three hundred eighty-three cycles of intrauterine insemination with superovulation were retrospectively analyzed. Semen analysis was performed with CASA before and after swim-up and the parameters were compared between pregnant and non-pregnant women. Results The pregn...

  2. Rethinking Sound : Computer-assisted reading intervention with a phonics approach for deaf and hard of hearing children using cochlear implants or hearing aids

    Nakeva von Mentzer, Cecilia

    2014-01-01

    In the present thesis, computer-assisted reading intervention with a phonics approach was examined in deaf and hard of hearing children (DHH) aged 5, 6 or 7 years old using cochlear implants, hearing aids or a combination of both. Children with normal hearing (NH), matched for non-verbal intelligence and age, served as a reference group. Deaf and hard of hearing children constitute a heterogenetic population regarding cognitive and academic achievement. Many of them do not reach age appropria...

  3. ACAC Converters for UPS

    Rusalin Lucian R. Păun

    2008-05-01

    Full Text Available This paper propose a new control technique forsingle – phase ACAC converters used for a on-line UPSwith a good dynamic response, a reduced-partscomponents, a good output characteristic, a good powerfactorcorrection(PFC. This converter no needs anisolation transformer. A power factor correction rectifierand an inverter with the proposed control scheme has beendesigned and simulated using Caspoc2007, validating theconcept.

  4. Development of Computer-assisted Liquor Evaluation Technology%白酒计算机品评技术的发展

    宋书玉

    2011-01-01

    The great contribution of computer-assisted liquor evaluation technology is digitization of sensory indexes, statistical calculation of sensory data by computer programming, and computer-assisted summary of sensory evaluation results. In this paper, the significance of computer-as- sisted liquor evaluation technology in liquor tasting, the functions of computer in liquor tasting, and the innovative application of computer-assist- ed liquor evaluation technology in liquor tasting were introduced in details.%白酒计算机品评技术的重要贡献是把感官指标数据化,通过计算机编程完成感官数据的统计计算,以及对感官品评的归纳总结。对白酒计算机品评技术在白酒品评中的重要性、计算机在白酒品评过程的功能、计算机品评技术在白酒品评过程的应用创新进行了详述。

  5. 计算机导航辅助下口内入路髁突切除术的临床应用%Clinical application of condylectomy via intraoral approach under computer assisted surgical navigation

    王晓霞; 李自力; 伊彪; 梁成; 田凯月; 王兴

    2013-01-01

    Objective To assess the application of computer assisted surgical navigation in condylectomy via intraoral approach and its clinical results.Methods Eight patients aged from 16 to 56 were treated by condylectomy via intraoral approach under computer assisted surgical navigation.There were 6 famale and 2 male.The lesions were condyle osteoma in 3 patients,hemimandibular hyperplasia and condylar hyperplasia in 5 patients.Most patients had concomitant LeFort Ⅰ osteotomy(6 cases),bilateral sagittal split ramus osteotomy (BSSRO) (5 cases),contralateral sagittal split ramus osteotomy (SSRO) (1 cases),genioplasty (4 cases) and mandible contouring (6 cases) to recover the facial symmetry.Results All patients had good occlusion,oral function and facial symmetry after the operation.The arerage mouth opening was 38 mm before operation,and 41 mm one month after operation.The temporomandibular joint (TMJ) dysfunction syndrome alleviated or disappeared.The follow-up period was 3-12 months,and results were stable.Conclusions Computer assisted surgical navigation can precisely accomplish the condylectomy via intraoral approach.It causes less trauma to the patient than traditional condylectomy,and can better preserve the TMJ structure and function.%目的 探讨计算机导航技术在口内喙突切除入路髁突切除术中的应用.方法 在计算机导航技术辅助下,采用口内喙突切除入路共完成8例患者的髁突病变切除手术治疗,患者年龄16 ~56岁,男性2例,女性6例,其中3例为髁突骨瘤,5例为半侧颌骨肥大畸形伴发的髁突良性肥大.6例同期进行上颌LeFoa Ⅰ型截骨术、5例双侧下颌升支矢状劈开截骨术、1例健侧下颌升支矢状劈开截骨术、4例颏成形术及6例下颌骨体或下颌角修整术,以恢复面部的对称性.结果 经术后CT验证,所有患者均按术前设计方案成功完成了髁突病变切除术,术后咬合关系、面部对称性恢复良好,颞下颌关节疼痛及弹响

  6. 76 FR 15321 - SEDASYS Computer-Assisted Personalized Sedation System; Ethicon Endo-Surgery, Inc.'s, Petition...

    2011-03-21

    ...; Ethicon Endo-Surgery, Inc.'s, Petition for Review of FDA's Denial of Premarket Approval AGENCY: Food and... that it intends to refer for review before an advisory committee Ethicon Endo- Surgery Inc.'s (EES's... docket. Any oral ex parte communication will be immediately memorialized in writing, served on...

  7. Clinical performance of computer-assisted detection (CAD) system in detecting carcinoma in breasts of different densities

    OBJECTIVES: To determine the clinical performance of a computer-assisted detection (CAD) system in detecting carcinoma in breasts of different densities. MATERIALS AND METHODS: A total of 264 sets of bilateral screening mammograms taken in craniocaudal and medial-lateral oblique projections during the year 1997 were divided into four groups according to the BI-RADS density classification: fatty (pattern 1), scattered fibroglandular (pattern 2), heterogeneously dense (pattern 3) and extremely dense (pattern 4). Each group contained about 60% normal and 40% biopsy-proven cancer cases. Of the malignant cases, there were a mixture of mammographic findings including focal masses (2.5 cm were not included. The chosen cases were then digitized and analysed by the CAD system. Sensitivity was calculated as detection of cancer by at least one marker in at least one view. Specificity was calculated as the number of false-positive marks per image on normal cases. Statistical tests of significance were performed by using contingency tables and Chi square test. RESULTS: The CAD system detected 14 out of the total 15 cancer cases in totally fatty breasts with a sensitivity of 93.3% at a specificity of 1.3 false-positive marks per image. In breasts with scattered fibroglandular pattern, the sensitivity was 93.9% (31/33) and the specificity was 1.6 false-positive marks per image while in heterogeneously dense breasts, the sensitivity of the CAD system fell to 84.8% at a specificity of 1.6 false-positive marks per image. The sensitivity of the CAD system further dropped to 64.3% in markedly dense breasts while maintaining a specificity of 1.2 false-positive marks per image. The decrease in sensitivity in dense breast was found to be significant (p = 0.046). CONCLUSION: The sensitivity of the CAD system deteriorated significantly as the density of the breast increased while the specificity of the system remained relatively constant. Ho, W. T. and Lam,P.W. (2003). Clinical Radiology58

  8. Oral myiasis

    Thalaimalai Saravanan

    2015-01-01

    Full Text Available Myiasis is a pathologic condition in humans occurring because of parasitic infestation. Parasites causing myiasis belong to the order Diptera. Oral myiasis is seen secondary to oral wounds, suppurative lesions, and extraction wounds, especially in individuals with neurological deficit. In such cases, neglected oral hygiene and halitosis attracts the flies to lay eggs in oral wounds resulting in oral myiasis. We present a case of oral myiasis in 40-year-old male patient with mental disability and history of epilepsy.

  9. Oral Insulin

    Kalra Sanjay; Kalra Bharti; Agrawal Navneet

    2010-01-01

    Abstract Oral insulin is an exciting area of research and development in the field of diabetology. This brief review covers the various approaches used in the development of oral insulin, and highlights some of the recent data related to novel oral insulin preparation.

  10. Estimating the cost-effectiveness of quality improving interventions in oral anticoagulation management within general practice.

    Claes, Neree; Moeremans, K; Buntinx, F.; Arnout, J; Vermylen, J.; H. van Loon; Annemans, L.

    2006-01-01

    OBJECTIVES: A clinical trial, "Belgian Improvement Study on Oral Anticoagulation Therapy (BISOAT)," significantly improved the quality after implementing four different quality-improving interventions in four randomly divided groups of general practitioners (GPs). The quality-improving interventions consisted of multifaceted education with or without feedback reports on their performance, international normalized ratio (INR) testing by the GP with a CoaguChek device or computer-assisted advic...

  11. Measuring the Dynamics of Climate Change Communication in Mass Media and Social Networks with Computer-Assisted Content Analysis

    Kirilenko, A.; Stepchenkova, S.

    2012-12-01

    To date, multiple authors have examined media representations of and public attitudes towards climate change, as well as how these representations and attitudes differ from scientific knowledge on the issue of climate change. Content analysis of newspaper publications, TV news, and, recently, Internet blogs has allowed for identification of major discussion themes within the climate change domain (e.g., newspaper trends, comparison of climate change discourse in different countries, contrasting liberal vs. conservative press). The majority of these studies, however, have processed texts manually, limiting textual population size, restricting the analysis to a relatively small number of themes, and using time-expensive coding procedures. The use of computer-assisted text analysis (CATA) software is important because the difficulties with manual processing become more severe with an increased volume of data. We developed a CATA approach that allows a large body of text materials to be surveyed in a quantifiable, objective, transparent, and time-efficient manner. While staying within the quantitative tradition of content analysis, the approach allows for an interpretation of the public discourse closer to one of more qualitatively oriented methods. The methodology used in this study contains several steps: (1) sample selection; (2) data preparation for computer processing and obtaining a matrix of keyword frequencies; (3) identification of themes in the texts using Exploratory Factor Analysis (EFA); (4) combining identified themes into higher order themes using Confirmatory Factor Analysis (CFA); (5) interpretation of obtained public discourse themes using factor scores; and (6) tracking the development of the main themes of the climate change discourse through time. In the report, we concentrate on two examples of CATA applied to study public perception of climate change. First example is an analysis of temporal change in public discourse on climate change. Applying

  12. AC power supply systems

    An ac power supply system includes a rectifier fed by a normal ac supply, and an inverter connected to the rectifier by a dc link, the inverter being effective to invert the dc output of the receiver at a required frequency to provide an ac output. A dc backup power supply of lower voltage than the normal dc output of the rectifier is connected across the dc link such that the ac output of the rectifier is derived from the backup supply if the voltage of the output of the inverter falls below that of the backup supply. The dc backup power may be derived from a backup ac supply. Use in pumping coolant in nuclear reactor is envisaged. (author)

  13. Do the effects of computer-assisted practice differ for children with reading disabilities with and without IQ-achievement discrepancy?

    Jiménez, Juan E; del Rosario Ortiz, María; Rodrigo, Mercedes; Hernández-Valle, Isabel; Ramírez, Gustavo; Estévez, Adelina; O'Shanahan, Isabel; de la Luz Trabaue, María

    2003-01-01

    This study was designed to assess whether the effects of computer-assisted practice on visual word recognition differed for children with reading disabilities (RD) with or without aptitude-achievement discrepancy. A sample of 73 Spanish children with low reading performance was selected using the discrepancy method, based on a standard score comparison (i.e., the difference between IQ and achievement standard scores). The sample was classified into three groups: (1) a group of 14 children with dyslexia (age M = 103.85 months; SD = 8.45) who received computer-based reading practice; (2) a group of 31 "garden-variety" (GV) poor readers (age M = 107.06 months; SD = 6.75) who received the same type of instruction; and (3) a group of 28 children with low reading performance (age M = 103.33 months; SD = 9.04) who did not receive computer-assisted practice. Children were pre- and posttested in word recognition, reading comprehension, phonological awareness, and visual and phonological tasks. The results indicated that both computer-assisted intervention groups showed improved word recognition compared to the control group. Nevertheless, children with dyslexia had more difficulties than GV poor readers during computer-based word reading under conditions that required extensive phonological computation, because their performance was more affected by low-frequency words and long words. In conclusion, we did not find empirical evidence in favor of the IQ-achievement discrepancy definition of reading disability, because IQ did not differentially predict treatment outcomes. PMID:15490890

  14. Oral Melanoma

    A Forouzandeh

    2002-02-01

    Full Text Available Melanoma is a malignant tumor that originates from melanocyte cells. Its oral type is rare. The goal of this investigation was to determine the prevalence of oral malignant melanoma in Iran, as determined by age, sex and location. This research reviewed 623 cases of oral and non-oral malignant melanoma in Immam-Khomeini hospital, Mearaj cancer institute and department of oral pathology of dental faculty, Tehran University of Medical Sciences in a period of 19 years from 1981-1999. The results showed that 54 cases of biopsy lesions were melanoma of oral cavity that included 7.8% of these lesions. The mean age incidence of oral melanoma was 55.5(between 26-86 years. The most prevalent sites were palate (37.1% and alveolar mucosa (20.4% and less common sites included floor of mouth. buccal mucosa and tongue.

  15. The Effects of Star Strategy of Computer-Assisted Mathematics Lessons on the Achievement and Problem Solving Skills in 2nd Grade Courses

    İPEK, Jale; Hatice Malaş

    2013-01-01

    The aim of research is to determine the effect of STAR strategy on 2nd grade students’ academic achievement and problem solving skills in the computer assisted mathematics instruction. 30 students who attend to 2nd grade course in a primary school in Aydın in 2010-2011 education year join the study group. The research has been taken place in 7 week. 3 types of tests have been used as means of data collecting tool, “Academic Achievement Test”, “Problem Solving Achievement Test” and “The Evalua...

  16. Do Interviewers' Health Beliefs and Habits Modify Responses to Sensitive Questions? A study using Data Collected from Pregnant women by Means of Computer-assisted Telephone Interviews

    Andersen, Anne-Marie Nybo; Olsen, Jørn

    2002-01-01

    through computer-assisted telephone interviews. The authors compared interviewer characteristics for 34 interviewers with the responses they obtained in 12,910 interviews carried out for the Danish National Birth Cohort Study. Response data on smoking and alcohol consumption in the first trimester of...... pregnancy were collected during the time period October 1, 1997-February 1, 1999. Overall, the authors found little evidence to suggest that interviewers' personal habits or attitudes toward smoking and alcohol consumption during pregnancy had consequences for the responses they obtained; neither did the...

  17. AcEST: DK950971 [AcEST

    Full Text Available optera acutorost... 37 0.66 tr|B1ACS6|B1ACS6_BALBN DMP1 (Fragment) OS=Balaenoptera ...bonaerens... 37 0.66 tr|B1ACS5|B1ACS5_BALED DMP1 (Fragment) OS=Balaenoptera edeni... GN=... 37 0.66 tr|B1ACS4|B1ACS4_BALBO DMP1 (Fragment) OS=Balaenoptera borealis ... 37 0.66 tr|B1ACS3|B1ACS3..._BALMU DMP1 (Fragment) OS=Balaenoptera musculus ... 37 0.86 tr|B1ACS1|B1ACS1_MEGNO DMP1 (Fragment) OS=Megapt...1ACS2_BALPH DMP1 (Fragment) OS=Balaenoptera physalus ... 37 1.1 tr|B1ACT6|B1ACT6_MESPE DMP1 (Fragment) OS=Me

  18. The Autographa californica multiple nucleopolyhedrovirus ac110 gene encodes a new per os infectivity factor.

    Jiantao Liu; Zhu, Leyuan; Zhang, Shan; Deng, Zihao; Huang, Zhihong; Yuan, Meijin; Wu, Wenbi; Yang, Kai

    2016-08-01

    The Autographa californica multiple nucleopolyhedrovirus (AcMNPV) ac110 gene is especially conserved in lepidopteran-specific baculoviruses and is uncharacterized. To investigate the role of ac110 in the baculovirus life cycle, an ac110-knockout (vAc110KO) and a repair (vAc110:HA) viruses were constructed in this study. Budded virion production and occlusion body formation were unaffected in vAc110KO-transfected or infected Sf9 cells. Intrahemocoelic injection of budded virions of vAc110KO killed Trichoplusia ni larvae as efficiently as the repair or the wild-type viruses. However, per os inoculation of occlusion bodies of vAc110KO failed to establish infection in T. ni larvae, while the repair virus was as efficient as the wild-type virus. Treatment with calcofluor white, a reagent that damages the peritrophic membrane, did not rescue the oral infectivity of vAc110KO. These results suggested that Ac110 is a new per os infectivity factor that may play a role after occlusion-derived virions pass through the peritrophic membrane during oral infection. PMID:27212681

  19. The Effect of the Computer Assisted Instruction (CAI on Student Attitude in Mathematics Teaching of Primary School 8th Class and Views of Students towards CAI

    Tuğba Hangül

    2010-12-01

    Full Text Available The aim of this study is to research the effect of the subject of “Geometric Objects” which is included in mathematics curriculum at the eighth grade on the student attitude using computer assisted instruction (CAI and find out grade 8 primary school students’ views about the computer-assisted instruction. In this study the pre-post attitude with experimental control group design was performed. The research was done under control and experiment groups consisting of fifty-three eighth grade students who were randomly identified in the year of 2009-2010. Attitude was applied to the both groups before and at the end of teaching. The method of constructivism was applied to control the group while CAI was applied to the experiment group. After teaching, fourteen students who were randomly selected from the experimental group were interviewed. Quantitative data was analyzed using Independent Samples t-test and qualitative data was analyzed by description analyze. At the end of the study, the data put forward that teaching through CAI improves the students’ attitudes positively than the method of Constructivism and students have positive opinions on CAI.

  20. Computer-Assisted Mandibular Reconstruction using a Patient-Specific Reconstruction Plate Fabricated with Computer-Aided Design and Manufacturing Techniques.

    Wilde, Frank; Cornelius, Carl-Peter; Schramm, Alexander

    2014-06-01

    We investigated the workflow of computer-assisted mandibular reconstruction that was performed with a patient-specific mandibular reconstruction plate fabricated with computer-aided design and computer-aided manufacturing (CAD/CAM) techniques and a fibula flap. We assessed the feasibility of this technique from virtual planning to the completion of surgery. Computed tomography (CT) scans of a cadaveric skull and fibula were obtained for the virtual simulation of mandibular resection and reconstruction using ProPlan CMF software (Materialise(®)/DePuy Synthes(®)). The virtual model of the reconstructed mandible provided the basis for the computer-aided design of a patient-specific reconstruction plate that was milled from titanium using a five-axis milling machine and CAM techniques. CAD/CAM techniques were used for producing resection guides for mandibular resection and cutting guides for harvesting a fibula flap. Mandibular reconstruction was simulated in a cadaveric wet laboratory. No problems were encountered during the procedure. The plate was fixed accurately to the residual bone without difficulty. The fibula segments were attached to the plate rapidly and reliably. The fusion of preoperative and postoperative CT datasets demonstrated high reconstruction precision. Computer-assisted mandibular reconstruction with CAD/CAM-fabricated patient-specific reconstruction plates appears to be a promising approach for mandibular reconstruction. Clinical trials are required to determine whether these promising results can be translated into successful practice and what further developments are needed. PMID:25045420

  1. The Effects of Star Strategy of Computer-Assisted Mathematics Lessons on the Achievement and Problem Solving Skills in 2nd Grade Courses

    Jale İPEK

    2013-12-01

    Full Text Available The aim of research is to determine the effect of STAR strategy on 2nd grade students’ academic achievement and problem solving skills in the computer assisted mathematics instruction. 30 students who attend to 2nd grade course in a primary school in Aydın in 2010-2011 education year join the study group. The research has been taken place in 7 week. 3 types of tests have been used as means of data collecting tool, “Academic Achievement Test”, “Problem Solving Achievement Test” and “The Evaluation Form of Problem Solving Skills”. At the end of research students’ views about computer assisted mathematics instruction were evaluated. It has been examined that whether the differences between the scores of pre-test and post-test are statistically meaningful or not. According to the results, a positive increase on the academic achievement and problem solving skills has been determined at the end of the education carried out with STAR strategy.

  2. Computer-assisted radiographic calculation of spinal curvature in brachycephalic "screw-tailed" dog breeds with congenital thoracic vertebral malformations: reliability and clinical evaluation.

    Guevar, Julien; Penderis, Jacques; Faller, Kiterie; Yeamans, Carmen; Stalin, Catherine; Gutierrez-Quintana, Rodrigo

    2014-01-01

    The objectives of this study were: To investigate computer-assisted digital radiographic measurement of Cobb angles in dogs with congenital thoracic vertebral malformations, to determine its intra- and inter-observer reliability and its association with the presence of neurological deficits. Medical records were reviewed (2009-2013) to identify brachycephalic screw-tailed dog breeds with radiographic studies of the thoracic vertebral column and with at least one vertebral malformation present. Twenty-eight dogs were included in the study. The end vertebrae were defined as the cranial end plate of the vertebra cranial to the malformed vertebra and the caudal end plate of the vertebra caudal to the malformed vertebra. Three observers performed the measurements twice. Intraclass correlation coefficients were used to calculate the intra- and inter-observer reliabilities. The intraclass correlation coefficient was excellent for all intra- and inter-observer measurements using this method. There was a significant difference in the kyphotic Cobb angle between dogs with and without associated neurological deficits. The majority of dogs with neurological deficits had a kyphotic Cobb angle higher than 35°. No significant difference in the scoliotic Cobb angle was observed. We concluded that the computer assisted digital radiographic measurement of the Cobb angle for kyphosis and scoliosis is a valid, reproducible and reliable method to quantify the degree of spinal curvature in brachycephalic screw-tailed dog breeds with congenital thoracic vertebral malformations. PMID:25198374

  3. Computer-assisted radiographic calculation of spinal curvature in brachycephalic "screw-tailed" dog breeds with congenital thoracic vertebral malformations: reliability and clinical evaluation.

    Julien Guevar

    Full Text Available The objectives of this study were: To investigate computer-assisted digital radiographic measurement of Cobb angles in dogs with congenital thoracic vertebral malformations, to determine its intra- and inter-observer reliability and its association with the presence of neurological deficits. Medical records were reviewed (2009-2013 to identify brachycephalic screw-tailed dog breeds with radiographic studies of the thoracic vertebral column and with at least one vertebral malformation present. Twenty-eight dogs were included in the study. The end vertebrae were defined as the cranial end plate of the vertebra cranial to the malformed vertebra and the caudal end plate of the vertebra caudal to the malformed vertebra. Three observers performed the measurements twice. Intraclass correlation coefficients were used to calculate the intra- and inter-observer reliabilities. The intraclass correlation coefficient was excellent for all intra- and inter-observer measurements using this method. There was a significant difference in the kyphotic Cobb angle between dogs with and without associated neurological deficits. The majority of dogs with neurological deficits had a kyphotic Cobb angle higher than 35°. No significant difference in the scoliotic Cobb angle was observed. We concluded that the computer assisted digital radiographic measurement of the Cobb angle for kyphosis and scoliosis is a valid, reproducible and reliable method to quantify the degree of spinal curvature in brachycephalic screw-tailed dog breeds with congenital thoracic vertebral malformations.

  4. Computer-Assisted Radiographic Calculation of Spinal Curvature in Brachycephalic “Screw-Tailed” Dog Breeds with Congenital Thoracic Vertebral Malformations: Reliability and Clinical Evaluation

    Guevar, Julien; Penderis, Jacques; Faller, Kiterie; Yeamans, Carmen; Stalin, Catherine; Gutierrez-Quintana, Rodrigo

    2014-01-01

    The objectives of this study were: To investigate computer-assisted digital radiographic measurement of Cobb angles in dogs with congenital thoracic vertebral malformations, to determine its intra- and inter-observer reliability and its association with the presence of neurological deficits. Medical records were reviewed (2009–2013) to identify brachycephalic screw-tailed dog breeds with radiographic studies of the thoracic vertebral column and with at least one vertebral malformation present. Twenty-eight dogs were included in the study. The end vertebrae were defined as the cranial end plate of the vertebra cranial to the malformed vertebra and the caudal end plate of the vertebra caudal to the malformed vertebra. Three observers performed the measurements twice. Intraclass correlation coefficients were used to calculate the intra- and inter-observer reliabilities. The intraclass correlation coefficient was excellent for all intra- and inter-observer measurements using this method. There was a significant difference in the kyphotic Cobb angle between dogs with and without associated neurological deficits. The majority of dogs with neurological deficits had a kyphotic Cobb angle higher than 35°. No significant difference in the scoliotic Cobb angle was observed. We concluded that the computer assisted digital radiographic measurement of the Cobb angle for kyphosis and scoliosis is a valid, reproducible and reliable method to quantify the degree of spinal curvature in brachycephalic screw-tailed dog breeds with congenital thoracic vertebral malformations. PMID:25198374

  5. Oral Cancer Exam

    Full Text Available ... for providing oral care. NIDCR > OralHealth > Topics > Oral Cancer > Oral Cancer Exam Video Oral Cancer Exam Video This video shows what happens during an oral cancer examination. Quick and painless, the exam can detect ...

  6. Oral histoplasmosis

    Patil Karthikeya

    2009-01-01

    Full Text Available Histoplasmosis is a systemic fungal disease that takes various clinical forms, among which oral lesions are rare. The disseminated form of the disease that usually occurs in association with Human Immunodeficiency Virus (HIV is one of the AIDS-defining diseases. Isolated oral histoplasmosis, without systemic involvement, with underlying immunosuppression due to AIDS is very rare. We report one such case of isolated oral histoplasmosis in a HIV-infected patient.

  7. AC1 Wing

    Adrian DOBRE

    2010-03-01

    Full Text Available The AC1 wing replaces the old wing of the wind tunnel model AEROTAXI, which has been made at scale 1:9. The new wing is part of CESAR program and improves the aerodynamic characteristics of the old one. The geometry of the whole wing was given by FOI Sweden and position of AC1 wing must coincide with the structure of the AEROTAXI model.

  8. AC1 Wing

    Adrian DOBRE

    2010-01-01

    The AC1 wing replaces the old wing of the wind tunnel model AEROTAXI, which has been made at scale 1:9. The new wing is part of CESAR program and improves the aerodynamic characteristics of the old one. The geometry of the whole wing was given by FOI Sweden and position of AC1 wing must coincide with the structure of the AEROTAXI model.

  9. Radiation absorbed from dental implant radiography: a comparison of linear tomography, CT scan, and panoramic and intra-oral techniques

    Clark, D.E.; Danforth, R.A.; Barnes, R.W.; Burtch, M.L. (Loma Linda Univ., CA (USA))

    1990-01-01

    Absorbed radiation dose in bone marrow, thyroid, salivary gland, eye, and skin entrance was determined by placement of lithium fluoride thermoluminescent dosimeters (TLD's) at selected anatomical sites within and on a human-like x-ray phantom. The phantom was exposed to radiation from linear tomographic and computer-assisted tomographic (CT) simulated dental implant radiographic examinations. The mean dose was determined for each anatomical site. Resulting dose measurements from linear tomography and computer-assisted tomography are compared with reported panoramic and intra-oral doses. CT examination delivered the greatest dose, while linear tomography was generally lowest. Panoramic and intra-oral doses were similar to those of linear tomography.

  10. The Effects of a Computer-Assisted Teaching Material, Designed According to the ASSURE Instructional Design and the ARCS Model of Motivation, on Students’ Achievement Levels in a Mathematics Lesson and Their Resulting Attitudes

    Hilal Karakış

    2016-03-01

    Full Text Available This study examined the effects that computer-assisted instruction had on students’ attitudes toward a mathematics lesson and toward learning mathematics with computer-assisted instruction. The computer software we used was based on the ASSURE Instructional Systems Design and the ARCS Model of Motivation, and the software was designed to teach fractions to fourth-grade students. The skill levels of these students were gauged before and after receiving the computer-assisted instruction. We structured our experimental design to use one group for both pre- and post-tests, which is considered to be one of the weak experimental designs. We conducted our research with 28 students studying in Balıkesir, Turkey, for a period of six weeks, using the specifically developed teaching material. We gathered our research data by applying an attitude scale to our mathematics lesson and to computer-assisted instruction. We also applied the Academic Achievement Test for Fractions Unit in Mathematics, a test we developed for our research. We analyzed our gathered data with the Wilcoxon Signed-Rank Test (n0.05. Based on the research results, we believe that similar materials can also be used for instructing other topics of mathematics, and similar computer-assisted activities can be developed for other courses.

  11. What do we know about interactive computer-assisted screening for intimate partner violence and control in clinical settings? A systematic review

    Farah Ahmad

    2010-06-01

    Full Text Available

    Background: Intimate partner violence is a major public health issue, particularly among women. Abused women experience many acute and chronic health consequences resulting in frequent healthcare visits. There exists a system-level opportunity to intervene, yet abused women refrain from spontaneous disclosure of their experiences of victimization due to embarrassment. Meanwhile providers often fail to ask due to lack of time, priority of acute medical problems and discomfort. Missed opportunities to detect intimate partner violence and control (IPVC can be availed by computer-assisted interactive screening.

    Aim: The purpose of this paper is to critically review current scientific knowledge on the use of enhanced Web 2.0 interactive computer-assisted screening for IPVC in clinical settings.

    Methods: A systematic review of peer-reviewed published literature was conducted using Medline and PsychInfo data bases from 1996 to 2010. Eligibility criteria were applied to the identified records. Additional studies were identified by searching reference list and contacting authors. Eight eligible studies were appraised for the study characteristics and IPVC related outcomes for the process-of-care, patient, and provider.

    Results: The selected studies (descriptive, randomized trial, and qualitative were conducted in the emergency and family medicine settings on two programs of research which used similar interactive computer screen, Promote Health. The reviewed evidence supports the effectiveness of computer screening for improving provider-patient communication on IPVC in both settings and compromised mental health in family medicine. However the management of detected cases of IPVC by time-pressed frontline clinicians needs a more supportive environment. The need for such system-level support is greater for the emergency setting

  12. Lumbar spine superior-level facet joint violations: percutaneous versus open pedicle screw insertion using intraoperative 3-dimensional computer-assisted navigation

    Tian Wei; Xu Yunfeng; Liu Bo; Liu Yajun; He Da; Yuan Qiang; Lang Zhao

    2014-01-01

    Background Percutaneous pedicle screw use has a high rate of cranial facet joint violations (FVs) because of the facet joint being indirectly visualized.Computer-assisted navigation shows the anatomic structures clearly,and may help to lower the rate of FVs during pedicle screw insertion.This study used computed tomography (CT) to evaluate and compare the incidence of FVs between percutaneous and open surgeries employing computer-assisted navigation for the implantation of pedicle screw instrumentation during lumbar fusions.Methods A prospective study,including 142 patients having lumbar and lumbosacral fusion,was conducted between January 2013 and April 2014.All patients had bilateral posterior pedicle screw-rod instrumentation (top-loading screws) implanted by the same group of surgeons; intraoperative 3-dimensional computer navigation was used during the procedures.All patients underwent CT examinations within 6 months postoperation.The CT scans were independently reviewed by three reviewers blinded to the technique used.Results The cohort comprised 68 percutaneous and 74 open cases (136 and 148 superior-level pedicle screw placements,respectively).Overall,superior-level FVs occurred in 20 patients (20/142,14.1%),involving 27 top screws (27/284,9.5%).The percutaneous technique (7.4% of patients,3.7% of top screws) had a significantly lower violation rate than the open procedure (20.3% of patients,14.9% of top screws).The open group also had significantly more serious violations than did the percutaneous group.Both groups had a higher violation rate when the cranial fixation involved the L5.A 1-level open procedure had a higher violation rate than did the 2-and 3-level surgeries.Conclusions With computer-assisted navigation,the placement of top-loading percutaneous screws carries a lower risk of adjacent-FVs than does the open technique; when FVs occur,they tend to be less serious.Performing a single-level open lumbar fusion,or the fusion of the L5-S1

  13. Cervical histology after routine ThinPrep or SurePath liquid-based cytology and computer-assisted reading in Denmark

    Rebolj, Matejka; Rask, Johanne; van Ballegooijen, Marjolein;

    2015-01-01

    nationwide registers, technological phases were identified by slide preparation, reading technique, and triage of borderline cytology. Trends in the detection of cervical intraepithelial neoplasia (CIN) were an indicator of the technology's relative sensitivity, and trends in false-positive tests an...... 58%; the 16% increase with ThinPrep was not significant. At 45-59 years, both technologies led to nonsignificant decreases in the detection. SurePath/FocalPoint doubled the frequency of false-positive tests at any age. With ThinPrep, these proportions remained the same at 23-29 years, but decreased...... by two-thirds at 45-59 years. In a fourth laboratory with continuous use of manually read conventional cytology, no such trends were seen. CONCLUSIONS: The sensitivity and specificity of modern LBC and computer-assisted reading technologies may be brand- and age-dependent....

  14. Computer-Assisted Language Learning (CALL in the EFL Classroom and its Impact on Effective Teaching-learning Process in Saudi Arabia

    Naiyer Azam Hashmi

    2016-03-01

    Full Text Available It is very interesting to see how Computer Assisted Language Learning (CALL has attracted many Arab students in learning English as a foreign language in the institutions of higher learning. It has great impact on their academic lives especially on teaching-learning process inside the classrooms. As a response to the students’ attraction in call, computer technologies have been brought into classrooms where they are considered to be effective in enhancing students learning and addressing certain education problems. The institutions of higher learning in Saudi Arabia, their students and faculty members have decided to try their best to utilize computer and other related technologies in their EFL classrooms for their fruitful teaching and learning outcomes. Thus, computers have taken centre stage and play an important role when it comes to language instruction in Saudi Arabia.Keywords:  CALL, Computer technologies, Foreign Language, Institutions of Higher-learning, Impact, Classrooms, Teaching, Learning, Issue

  15. THE EFFECTIVENESS OF COMPUTER ASSISTED INSTRUCTION IN TEACHING PHYSICAL SCIENCES IN SECONDARY SCHOOL OF THE RURAL AREA OF BURDWAN DISTRICT, WEST BENGAL.

    Basudeb Roy Chaudhury

    2014-04-01

    Full Text Available This Experimental study compared academic performance of students in class- X (ten in one of the Bengali Medium School of rural area of Burdwan District, West Bengal , India between traditional instruction, and Computer Assisted Instruction with simultaneous discussion. The design used in this study was pre-test and post-test to control group and experiment group. Fifty students of class-x were selected and two groups were formed. Students of each group were selected randomly. Statistical data analysis was used in data analysis. Significant difference was found in the post test scores of students receiving traditional method, and CAI with simultaneous discussion. It revealed that CAI with simultaneous discussion is more effective than traditional method

  16. A job safety program for construction workers designed to reduce the potential for occupational injury using tool box training sessions and computer-assisted biofeedback stress management techniques.

    Johnson, Kenneth A; Ruppe, Joan

    2002-01-01

    This project was conducted with a multicultural construction company in Hawaii, USA. The job duties performed included drywall and carpentry work. The following objectives were selected for this project: (a) fire prevention training and inspection of first aid equipment; (b) blood-borne pathogen training and risk evaluation; (c) ergonomic and risk evaluation intervention program; (d) electrical safety training and inspection program; (e) slips, trips, and falls safety training; (f) stress assessment and Personal Profile System; (g) safety and health program survey; (h) improving employee relations and morale by emphasizing spirituality; and (i) computer-assisted biofeedback stress management training. Results of the project indicated that observed safety hazards, reported injuries, and levels of perceived stress. were reduced for the majority of the population. PMID:12189103

  17. Reduce in Variation and Improve Efficiency of Target Volume Delineation by a Computer-Assisted System Using a Deformable Image Registration Approach

    Purpose: To determine whether a computer-assisted target volume delineation (CAT) system using a deformable image registration approach can reduce the variation of target delineation among physicians with different head and neck (HN) IMRT experiences and reduce the time spent on the contouring process. Materials and Methods: We developed a deformable image registration method for mapping contours from a template case to a patient case with a similar tumor manifestation but different body configuration. Eight radiation oncologists with varying levels of clinical experience in HN IMRT performed target delineation on two HN cases, one with base-of-tongue (BOT) cancer and another with nasopharyngeal cancer (NPC), by first contouring from scratch and then by modifying the contours deformed by the CAT system. The gross target volumes were provided. Regions of interest for comparison included the clinical target volumes (CTVs) and normal organs. The volumetric and geometric variation of these regions of interest and the time spent on contouring were analyzed. Results: We found that the variation in delineating CTVs from scratch among the physicians was significant, and that using the CAT system reduced volumetric variation and improved geometric consistency in both BOT and NPC cases. The average timesaving when using the CAT system was 26% to 29% for more experienced physicians and 38% to 47% for the less experienced ones. Conclusions: A computer-assisted target volume delineation approach, using a deformable image-registration method with template contours, was able to reduce the variation among physicians with different experiences in HN IMRT while saving contouring time

  18. 汽车起重机计算机辅助吊装方案设计%Computer-assisted lifting plan design of truck crane

    刘晓莲; 陶元芳; 李坤; 宁志强

    2013-01-01

    Aiming at problems of large working amount and low accuracy in the manual lifting planning for truck cranes, the paper analyzes and discusses the methods of selecting and determining the optimum lifting plans with computer assistance, the computer-assisted hoisting plan design system is developed through programming. The hoisting condition is analyzed at first to work out the minimum boom length and minimum radius meeting such hoisting condition; then the nonlinear equations between the hoisting capacity and working radius under different working conditions are fitted based on the data in the performance table; at last, the proposed crane model with the minimum boom length, minimum radius and load weight meeting the working condition is selected and verified.%针对手工制订汽车起重机吊装方案工作量大、精确度不高的问题,分析并探讨了利用计算机辅助进行最优吊装方案选择与确定的方法,通过编程开发了计算机辅助吊装方案设计系统.首先对吊装工况进行分析,计算出满足吊装工况的最小臂长和最小幅度;其次以其性能表中的数据为基础,拟合出不同工况下起重量与工作幅度之间的非线性方程;最后以满足吊装工况的最小臂长、最小幅度及物体质量选择拟采用的起重机型号并校核.

  19. Computer-assisted resilience training to prepare healthcare workers for pandemic influenza: a randomized trial of the optimal dose of training

    Vincent Leslie

    2010-03-01

    Full Text Available Abstract Background Working in a hospital during an extraordinary infectious disease outbreak can cause significant stress and contribute to healthcare workers choosing to reduce patient contact. Psychological training of healthcare workers prior to an influenza pandemic may reduce stress-related absenteeism, however, established training methods that change behavior and attitudes are too resource-intensive for widespread use. This study tests the feasibility and effectiveness of a less expensive alternative - an interactive, computer-assisted training course designed to build resilience to the stresses of working during a pandemic. Methods A "dose-finding" study compared pre-post changes in three different durations of training. We measured variables that are likely to mediate stress-responses in a pandemic before and after training: confidence in support and training, pandemic-related self-efficacy, coping style and interpersonal problems. Results 158 hospital workers took the course and were randomly assigned to the short (7 sessions, median cumulative duration 111 minutes, medium (12 sessions, 158 minutes or long (17 sessions, 223 minutes version. Using an intention-to-treat analysis, the course was associated with significant improvements in confidence in support and training, pandemic self-efficacy and interpersonal problems. Participants who under-utilized coping via problem-solving or seeking support or over-utilized escape-avoidance experienced improved coping. Comparison of doses showed improved interpersonal problems in the medium and long course but not in the short course. There was a trend towards higher drop-out rates with longer duration of training. Conclusions Computer-assisted resilience training in healthcare workers appears to be of significant benefit and merits further study under pandemic conditions. Comparing three "doses" of the course suggested that the medium course was optimal.

  20. Quality Computer Assisted Mobile Learning (CAML and Distance Education Leadership in Managing Technology Enhanced Learning Management System (TELMS in the Malaysian Public Tertiary Education

    Lee Tan Luck

    2009-07-01

    Full Text Available Abstract - The success in the implementation of a quality computer assisted mobile learning and distance education in a Technology Enhanced Learning Management System is highly rely on the academic leadership in managing and application of Information and Communication Technology (ICT in the tertiary level. The effectiveness of its leadership, knowledge, application and management of ICT and learning management system is of utmost important. Successful application and management includes quality and cost effectiveness of universities administration, CAML and distance education leadership development, organizational culture, academic staffs and students’ attitude and their commitment towards teaching and learning process, support towards the usage of state of the art techno-educational facilities, availability of ICT resources, maintenance and funding of a Learning Management System. This paper will discuss the above factors, which present a comprehensive framework for the implementation of a quality CAML and distance education environment in ICT application and management in the Malaysian public universities. Selected Fifty-two respondents from two Malaysian public universities which offer e Learning and distance education with Learning Management System were acquired. A survey questionnaire is used to determine the effectiveness of ICT and mobile learning application management. Data from the questionnaires were analyzed by using non-parametric and parametric statistics testing. Results of this study show there is significant different in the CAML and distance education leadership in TELMS and the application of ICT and its management in the Malaysian public universities. The study will also address the implementation elements necessary for transforming the public universities and its CAML and distance education teaching and learning process into an effective and result oriented computer assisted mobile learning management model in public

  1. ac bidirectional motor controller

    Schreiner, K.

    1988-01-01

    Test data are presented and the design of a high-efficiency motor/generator controller at NASA-Lewis for use with the Space Station power system testbed is described. The bidirectional motor driver is a 20 kHz to variable frequency three-phase ac converter that operates from the high-frequency ac bus being designed for the Space Station. A zero-voltage-switching pulse-density-modulation technique is used in the converter to shape the low-frequency output waveform.

  2. Oral Cancer Exam

    Full Text Available ... Dental Research See All Continuing Education Practical Oral Care for People With Developmental Disabilities – This booklet presents ... developmental disabilities and offers strategies for providing oral care. NIDCR > OralHealth > Topics > Oral Cancer > Oral Cancer Exam ...

  3. Oral Cancer Exam

    Full Text Available ... common in patients with developmental disabilities and offers strategies for providing oral care. NIDCR > OralHealth > Topics > Oral ... diagnosis, and treatment of oral cancer, along with definitions of selected medical terms and resource information. Oral ...

  4. Oral Cancer Exam

    ... Topics > Oral Cancer > The Oral Cancer Exam The Oral Cancer Exam Main Content See a step-by-step video explaining what happens during an oral cancer examination. An oral cancer exam is painless and quick — it takes ...

  5. Oral Cancer Exam

    Full Text Available ... Oral Cancer > Oral Cancer Exam Video Oral Cancer Exam Video This video shows what happens during an oral cancer examination. Quick and painless, the exam can detect oral cancer early—when it can ...

  6. Methylprednisolone Oral

    ... Nizoral), oral contraceptives, phenobarbital, phenytoin (Dilantin), rifampin (Rifadin), theophylline (Theo-Dur), and vitamins.if you have a ... stomach irritation vomiting headache dizziness insomnia restlessness depression anxiety acne increased hair growth easy bruising irregular or ...

  7. Dexamethasone Oral

    ... Nizoral), oral contraceptives, phenobarbital, phenytoin (Dilantin), rifampin (Rifadin), theophylline (Theo-Dur), and vitamins.if you have a ... stomach irritation vomiting headache dizziness insomnia restlessness depression anxiety acne increased hair growth easy bruising irregular or ...

  8. Hydrocortisone Oral

    ... Nizoral), oral contraceptives, phenobarbital, phenytoin (Dilantin), rifampin (Rifadin), theophylline (Theo-Dur), and vitamins.if you have a ... stomach irritation vomiting headache dizziness insomnia restlessness depression anxiety acne increased hair growth easy bruising irregular or ...

  9. Oral Cancer

    ... use. Some oral cancers are linked to human papilloma virus (HPV) infections of the mouth and throat. ... The number of oropharyngeal cancers linked to human papilloma virus (HPV) has risen dramatically over the past ...

  10. Oral myiasis

    Treville Pereira; Tamgadge, Avinash P.; Mayura S Chande; Sudhir Bhalerao; Sandhya Tamgadge

    2010-01-01

    Myiasis is a relatively rare condition arising from the invasion of body tissues or cavities of living animals or humans by maggots or larvae of certain species of flies. It is an uncommon clinical condition, being more frequent in underdeveloped countries and hot climate regions, and is associated with poor hygiene, suppurative oral lesions; alcoholism and senility. Its diagnosis is made basically by the presence of larvae. The present article reports a case of oral myiasis involving 20 larv...

  11. AC/RF Superconductivity

    Ciovati, Gianluigi [JLAB

    2015-02-01

    This contribution provides a brief introduction to AC/RF superconductivity, with an emphasis on application to accelerators. The topics covered include the surface impedance of normal conductors and superconductors, the residual resistance, the field dependence of the surface resistance, and the superheating field.

  12. AC/RF Superconductivity

    Ciovati, G.

    2015-01-01

    This contribution provides a brief introduction to AC/RF superconductivity, with an emphasis on application to accelerators. The topics covered include the surface impedance of normal conductors and superconductors, the residual resistance, the field dependence of the surface resistance, and the superheating field.

  13. Increased Ac excision (iae): Arabidopsis thaliana mutations affecting Ac transposition

    The maize transposable element Ac is highly active in the heterologous hosts tobacco and tomato, but shows very much reduced levels of activity in Arabidopsis. A mutagenesis experiment was undertaken with the aim of identifying Arabidopsis host factors responsible for the observed low levels of Ac activity. Seed from a line carrying a single copy of the Ac element inserted into the streptomycin phosphotransferase (SPT) reporter fusion, and which displayed typically low levels of Ac activity, were mutagenized using gamma rays. Nineteen mutants displaying high levels of somatic Ac activity, as judged by their highly variegated phenotypes, were isolated after screening the M2 generation on streptomycin-containing medium. The mutations fall into two complementation groups, iae1 and iae2, are unlinked to the SPT::Ac locus and segregate in a Mendelian fashion. The iae1 mutation is recessive and the iae2 mutation is semi-dominant. The iae1 and iae2 mutants show 550- and 70-fold increases, respectively, in the average number of Ac excision sectors per cotyledon. The IAE1 locus maps to chromosome 2, whereas the SPT::Ac reporter maps to chromosome 3. A molecular study of Ac activity in the iae1 mutant confirmed the very high levels of Ac excision predicted using the phenotypic assay, but revealed only low levels of Ac re-insertion. Analyses of germinal transposition in the iae1 mutant demonstrated an average germinal excision frequency of 3% and a frequency of independent Ac re-insertions following germinal excision of 22%. The iae mutants represents a possible means of improving the efficiency of Ac/Ds transposon tagging systems in Arabidopsis, and will enable the dissection of host involvement in Ac transposition and the mechanisms employed for controlling transposable element activity

  14. Cranial computer assisted tomography and electroencephalography in children with acute lymphocytic leukemia : a longitudinal study : Computertomografie van de schedel en electroencephalografisch onderzoek bij kinderen met een acute lymfatische leukemie. Een longitudinale studie

    K. Hählen (Karel)

    1990-01-01

    textabstractThis longitudinal study was initiated in order to examine the nature and sequence of structural and functional cerebral abnormalities in children with acute lymphocytic leukemia (ALL). For this purpose computer assisted tomography scans of the brain ( CT scans ) and electroencephalograms

  15. A Cross-Cultural Study of the Effect of a Graph-Oriented Computer-Assisted Project-Based Learning Environment on Middle School Students' Science Knowledge and Argumentation Skills

    Hsu, P.-S.; Van Dyke, M.; Chen, Y.; Smith, T. J.

    2016-01-01

    The purpose of this mixed-methods study was to explore how seventh graders in a suburban school in the United States and sixth graders in an urban school in Taiwan developed argumentation skills and science knowledge in a project-based learning environment that incorporated a graph-oriented, computer-assisted application (GOCAA). A total of 42…

  16. Oral myiasis

    Treville Pereira

    2010-01-01

    Full Text Available Myiasis is a relatively rare condition arising from the invasion of body tissues or cavities of living animals or humans by maggots or larvae of certain species of flies. It is an uncommon clinical condition, being more frequent in underdeveloped countries and hot climate regions, and is associated with poor hygiene, suppurative oral lesions; alcoholism and senility. Its diagnosis is made basically by the presence of larvae. The present article reports a case of oral myiasis involving 20 larvae in a patient with neurological deficiency.

  17. Oral candidiasis.

    Millsop, Jillian W; Fazel, Nasim

    2016-01-01

    Oral candidiasis (OC) is a common fungal disease encountered in dermatology, most commonly caused by an overgrowth of Candida albicans in the mouth. Although thrush is a well-recognized presentation of OC, it behooves clinicians to be aware of the many other presentations of this disease and how to accurately diagnose and manage these cases. The clinical presentations of OC can be broadly classified as white or erythematous candidiasis, with various subtypes in each category. The treatments include appropriate oral hygiene, topical agents, and systemic medications. This review focuses on the various clinical presentations of OC and treatment options. PMID:27343964

  18. Hermetisk AC-Krets

    Hirsch, Carl; Smirnoff, Alexander

    2007-01-01

    Under sex månader våren 2007 har ett samarbete mellan Volvo Lastvagnar och två studenter från KTH, inriktning Integrerad produktutveckling vid institutionen för maskinkonstruktion, pågått i form av ett examensarbete på 20 poäng. Dagens AC-system i Volvos lastbilar avger 20-40 g/år av köldmediet R134a som är en kraftfull växthusgas. Detta sker främst genom diffusion via slangar och tätningsmaterial. Syftet med detta examensarbete är att ta fram förslag på tekniska lösningar på ett nytt AC-syst...

  19. Oral calcitonin

    Hamdy RC

    2012-09-01

    Full Text Available Ronald C Hamdy,1,2 Dane N Daley11Osteoporosis Center, College of Medicine, East Tennessee State University, 2Veterans Affairs Medical Center, Johnson City, TN, USAAbstract: Calcitonin is a hormone secreted by the C-cells of the thyroid gland in response to elevations of the plasma calcium level. It reduces bone resorption by inhibiting mature active osteoclasts and increases renal calcium excretion. It is used in the management of postmenopausal osteoporosis, Paget's disease of bone, and malignancy-associated hypercalcemia. Synthetic and recombinant calcitonin preparations are available; both have similar pharmacokinetic and pharmacodynamic profiles. As calcitonin is a peptide, the traditional method of administration has been parenteral or intranasal. This hinders its clinical use: adherence with therapy is notoriously low, and withdrawal from clinical trials has been problematic. An oral formulation would be more attractive, practical, and convenient to patients. In addition to its effect on active osteoclasts and renal tubules, calcitonin has an analgesic action, possibly mediated through β-endorphins and the central modulation of pain perception. It also exerts a protective action on cartilage and may be useful in the management of osteoarthritis and possibly rheumatoid arthritis. Oral formulations of calcitonin have been developed using different techniques. The most studied involves drug-delivery carriers such as Eligen® 8-(N-2hydroxy-5-chloro-benzoyl-amino-caprylic acid (5-CNAC (Emisphere Technologies, Cedar Knolls, NJ. Several factors affect the bioavailability and efficacy of orally administered calcitonin, including amount of water used to take the tablet, time of day the tablet is taken, and proximity to intake of a meal. Preliminary results looked promising. Unfortunately, in two Phase III studies, oral calcitonin (0.8 mg with 200 mg 5-CNAC, once a day for postmenopausal osteoporosis and twice a day for osteoarthritis failed to

  20. Effects of neurofeedback and computer-assisted cognitive rehabilitation on relative brain wave ratios and activities of daily living of stroke patients: a randomized control trial.

    Cho, Hwi-Young; Kim, Ki-Tae; Jung, Jin-Hwa

    2016-07-01

    [Purpose] This study investigated the effects of neurofeedback (NFB) and computer-assisted cognitive rehabilitation (CACR) on the relative brain wave ratios and activities of daily living (ADL) of stroke patients. [Subjects and Methods] Forty-four participants were randomly allocated to the NFB (n=14), CACR (n=14), or control (CON) (n=16) groups. Two expert therapists provided the NFB, CACR, and CON groups with traditional rehabilitation therapy in 30-minute sessions, 5 times a week, for 6 weeks. NFB training was provided only to the NFB group and CACR training was provided only to the CACR group. The CON group received traditional rehabilitation therapy only. Before and after 6 weeks of intervention, brain wave and ADL evaluations were performed, and the results were analyzed. [Results] The relative ratio of beta waves, only showed a significant increase in the frontal and parietal areas of the NFB group. Significant changes in ADL were shown by all three groups after the intervention. However, there were no significant differences between the NFB and CACR groups and the CON group. [Conclusion] Our results suggest that CACR and NFB are effective at improving cognitive function and ADL of stroke patients. PMID:27512287

  1. Object-oriented design and implementation of CFDLab: a computer-assisted learning tool for fluid dynamics using dual reciprocity boundary element methodology

    Friedrich, J.

    1999-08-01

    As lecturers, our main concern and goal is to develop more attractive and efficient ways of communicating up-to-date scientific knowledge to our students and facilitate an in-depth understanding of physical phenomena. Computer-based instruction is very promising to help both teachers and learners in their difficult task, which involves complex cognitive psychological processes. This complexity is reflected in high demands on the design and implementation methods used to create computer-assisted learning (CAL) programs. Due to their concepts, flexibility, maintainability and extended library resources, object-oriented modeling techniques are very suitable to produce this type of pedagogical tool. Computational fluid dynamics (CFD) enjoys not only a growing importance in today's research, but is also very powerful for teaching and learning fluid dynamics. For this purpose, an educational PC program for university level called 'CFDLab 1.1' for Windows™ was developed with an interactive graphical user interface (GUI) for multitasking and point-and-click operations. It uses the dual reciprocity boundary element method as a versatile numerical scheme, allowing to handle a variety of relevant governing equations in two dimensions on personal computers due to its simple pre- and postprocessing including 2D Laplace, Poisson, diffusion, transient convection-diffusion.

  2. Oral Sex, Oral Health and Orogenital Infections

    Rajiv Saini; Santosh Saini; Sugandha Sharma

    2010-01-01

    Oral sex is commonly practiced by sexually active male-female and same-gender couples of various ages, including adolescents. The various type of oral sex practices are fellatio, cunnilingus and analingus. Oral sex is infrequently examined in research on adolescents; oral sex can transmit oral, respiratory, and genital pathogens. Oral health has a direct impact on the transmission of infection; a cut in your mouth, bleeding gums, lip sores or broken skin increases chances of infection. Althou...

  3. Oral care.

    Hitz Lindenmüller, Irène; Lambrecht, J Thomas

    2011-01-01

    Adequate dental and oral hygiene may become a challenge for all users and especially for elderly people and young children because of their limited motor skills. The same holds true for patients undergoing/recovering from chemo-/radiotherapy with accompanying sensitive mucosal conditions. Poor dental hygiene can result in tooth decay, gingivitis, periodontitis, tooth loss, bad breath (halitosis), fungal infection and gum diseases. The use of a toothbrush is the most important measure for oral hygiene. Toothbrushes with soft bristles operated carefully by hand or via an electric device help to remove plaque and to avoid mucosal trauma. A handlebar with a grip cover can be helpful for manually disabled patients or for those with reduced motor skills. In case of oral hygiene at the bedside or of patients during/after chemo-/radiotherapy a gauze pad can be helpful for gently cleaning the teeth, gums and tongue. The use of fluoride toothpaste is imperative for the daily oral hygiene. Detergents such as sodium lauryl sulphate improve the cleaning action but may also dehydrate and irritate the mucous membrane. The use of products containing detergents and flavouring agents (peppermint, menthol, cinnamon) should therefore be avoided by bedridden patients or those with dry mouth and sensitive mucosa. Aids for suitable interdental cleaning, such as dental floss, interdental brushes or dental sticks, are often complicated to operate. Their correct use should be instructed by healthcare professionals. To support dental care, additional fluoridation with a fluoride gel or rinse can be useful. Products further containing antiseptics such as chlorhexidine or triclosan reduce the quantity of bacteria in the mouth. For patients undergoing or having undergone radio-/chemotherapy, a mouthwash that concomitantly moisturizes the oral mucosa is advisable. PMID:21325845

  4. Oral Cancer Exam

    Full Text Available ... Topics > Oral Cancer > Oral Cancer Exam Video Oral Cancer Exam Video This video shows what happens during an oral cancer examination. Quick and painless, the exam can detect ...

  5. Oral Health and Aging

    ... please turn JavaScript on. Feature: Oral Health and Aging Oral Health and Aging Summer 2016 Table of Contents Jerrold H. Epstein, ... they may need. Read More "Oral Health and Aging" Articles Oral Health and Aging / 4 Myths About ...

  6. Computer assisted tutoring in radiology

    The computer-based tutoring of visual concepts such as radiological images is a largely unexplored area. A review of the literature highlights limited use of computers as a means of radiological education, with the majority of systems being little more than hypermedia prototypes, on-line teaching files, and passive CD-Roms. Very few of the systems discussed in the research literature draw on the work from cognitive science and educational psychology for tutoring visual concepts. This thesis details and evaluates a method for indexing and retrieving images from large image databases via a cognitively informed graphical representation of visual concepts. This representation is derived using Multiple Correspondence Analysis from a statistical analysis of features present in the images. It is intended that this representation be used to assist in the computer based teaching of any discipline that requires the tutoring of visual concepts. The domain used as a test bed for this research is Magnetic Resonance Imaging in neuroradiology. Tutoring the interpretation of MR scans of the head represents a real practical problem due to the inherent complexity of the brain and variations in tissue contrast within image sequence and disease/pathology. The literature of concept categorisation and representation is critically reviewed to inform the design of a graphical representation of a concept (a pathology in the application domain). A specification for the design of an explicit representation of visual concepts is drawn from this literature review, together with methods of tutoring based around this model. A methodology for producing this representation is described, and implemented in the development of an overview plot for the concept of a disease of the brain, with associated statistical measures derived and operationalised for typicality and similarity of cases within a disease. These measures are precursors to the development of computer based tutoring strategies for image interpretation. The overview plots provide the user with a visual display of the variation in presentation of cases for a given disease. An important aspect of the research is the evaluation of the accuracy of this representation and its usability in browsing cases in a tutoring environment. A prototype tutoring environment has been designed based around case based teaching, and an image browser which offers the majority of the functionality available in the tutoring environment was used in the evaluations. A series of evaluations was undertaken to examine the accuracy and usability of the overview plot and its associated measures of typicality and similarity. The overview plot is shown to provide a good first approximation to the experts similarity estimates of cases within a disease and as such provides a representation of a disease that closely matches the experts view of the similarity of cases. A second series of evaluations involving novice, intermediate and expert 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 such, adds to the body of knowledge concerning computer based training of visual concepts. (author)

  7. Statistical computer-assisted translation

    Khadivi, Shahram

    2008-01-01

    In recent years, significant improvements have been achieved in statistical machine translation (MT), but still even the best machine translation technology is far from replacing or even competing with human translators. However, an MT system helps to increase the productivity of human translators. Usually, human translators edit the MT system output to correct the errors, or they may edit the source text to limit vocabulary. A way of increasing the productivity of the whole translation proce...

  8. Computer-Assisted School Maintenance

    Kennedy, Mike

    2012-01-01

    At thousands of schools and universities, years of economic troubles have led to repeated budget cuts. The reductions typically fall disproportionately on maintenance departments, where cuts are viewed as less critical than those that directly affect classroom instruction. And so nearly every facility manager at an education institution faces a…

  9. Computer-assisted propofol administration.

    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 tutoring in radiology

    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...

  11. Computer Assisted Teaching of FORTRAN.

    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)

  12. [Continuous computer-assisted monitoring].

    Ritz, R

    1982-07-01

    Optimal monitoring of vital parameters in critically ill patients should be performed continuously with non-invasive and automatic methods including trend presentation of the data. Continuous measurements are now in frequent use in intensive care units, and non-invasive techniques are being increasingly explored. Besides automatic registration, computerization of monitoring allows trend presentation of the measured values and thereby improves diagnostic and therapeutic procedures. The characteristic peculiarities of a computer, i.e. acquisition, computing and presentation of the data, as well as storage capacity, enable simultaneous monitoring of several complex parameters, as is demonstrated by arrhythmia monitoring systems already in routine use. Optimal patient surveillance is described in three practical examples of computer application. PMID:7112071

  13. Computer-Assisted Pregnancy Management

    Haug, Peter J.; Hebertson, Richard M.; Heywood, Reed E.; Larkin, Ronald; Swapp, Craig; Waterfall, Brian; Warner, Homer R.

    1987-01-01

    A computer system under development for the management of pregnancy is described. This system exploits expert systems tools in the HELP Hospital Information System to direct the collection of clinical data and to generate medical decisions aimed at enhancing and standardizing prenatal care.

  14. High performance AC drives

    Ahmad, Mukhtar

    2010-01-01

    This book presents a comprehensive view of high performance ac drives. It may be considered as both a text book for graduate students and as an up-to-date monograph. It may also be used by R & D professionals involved in the improvement of performance of drives in the industries. The book will also be beneficial to the researchers pursuing work on multiphase drives as well as sensorless and direct torque control of electric drives since up-to date references in these topics are provided. It will also provide few examples of modeling, analysis and control of electric drives using MATLAB/SIMULIN

  15. Superconducting ac cable

    The components of a superconducting 110 kV ac cable for power ratings >= 2000 MVA have been developed. The cable design especially considered was of the semiflexible type, with a rigid cryogenic envelope and flexible hollow coaxial cable cores pulled into the former. The cable core consists of spirally wound Nb-Al composite wires and a HDPE-tape wrapped electrical insulation. A 35 m long single phase test cable with full load terminations for 110 kV and 10 kA was constructed and successfully tested. The results obtained prove the technical feasibility and capability of our cable design. (orig.)

  16. A comparative study of sperm morphometric subpopulations in cattle, goat, sheep and pigs using a computer-assisted fluorescence method (CASMA-F).

    Vicente-Fiel, S; Palacín, I; Santolaria, P; Yániz, J L

    2013-06-01

    This study was designed to compare the sperm nuclear morphometric subpopulations of four species of domestic artiodactyls (cattle, sheep, goat and pigs). Samples from 20 males of each species were collected. After semen collection, sperm concentration and motility were measured and samples prepared for morphometric determinations. Smears were fixed with 2% glutaraldehyde, stained with Hoechst 33342 and photographed. At least 200 spermatozoa per sample were processed using the Image J analysis open software. Clustering procedures were performed to identify sperm subpopulations using the morphometric data obtained from each species. Results of the present study show that, applying the computer-assisted sperm morphometry analyisis-fluorescence (CASMA-F) technology and multivariate cluster analyses, it was possible to determine the subpopulations of spermatozoa with different morphometric characteristics in the four species studied. Bulls and boars had two clearly differentiated size categories: large and small. However, the final sperm subpopulations were four in the bull (large-round, large-elongated, small-round, and small-elongated) and only three in the boar (large, small-elongated and small-round). In small ruminant species, three sperm nuclei size categories were established: large, average sized and small. Two of these subpopulations were also elongated in goat bucks, with three subpopulations (large-round, small-elongated and average size-elongated). In the ram three morphometric subpopulations were also obtained (large, small and average size-round), but none was elongated. When comparing among species, sperm subpopulations were smaller in the buck and less elliptical and elongated in the ram than those in the other species studied. Male variability was identified in the distribution of sperm subpopulations described in the four species studied. It was concluded that the combination of CASMA-F technology with multivariate cluster analyses allow the study of

  17. Molecular diagnosis of mucopolysaccharidosis Type II (Hunter syndrome) by automated sequencing and computer-assisted interpretation: Toward mutation mapping of the Iduronate-2-sulfatase gene

    Jonsson, J.J.; Aronovich, E.L.; Braun, S.E.; Whitley, C.B. [Univ. of Minnesota Medical School, Minneapolis, MN (United States)

    1995-03-01

    Virtually all mutations causing Hunter syndrome (mucopolysaccharidosis type II) are expected to be new mutations. Therefore, as a means of molecular diagnosis, we developed a rapid method to sequence the entire iduronate-2-sulfatase (IDS) coding region. PCR amplicons representing the IDS cDNA were sequenced with an automatic instrument, and output was analyzed by computer-assisted interpretation of tracings, using Staden programs on a Sun computer. Mutations were found in 10 of 11 patients studied. Unique missense mutations were identified in five patients: H229Y (685{r_arrow}T, severe phenotype); P358R (1073C{r_arrow}G, severe); R468W (1402C{r_arrow}T, mild); P469H (1406C{r_arrow}A, mild); and Y523C (1568A{r_arrow}G, mild). Nonsense mutations were identified in two patients: R172X (514C{r_arrow}T, severe) and Q389X (1165C{r_arrow}T, severe). Two other patients with severe disease had insertions of 1 and 14 bp, in exons 3 and 6, respectively. In another patient with severe disease, the predominant (<95%) IDS message resulted from aberrant splicing, which skipped exon 3. In this last case, consensus sequences for splice sites in exon 3 were intact, but a 395C{r_arrow}G mutation was identified 24 bp upstream from the 3` splice of exon 3. This mutation created a cryptic 5` splice site with a better consensus sequence for 5` splice sites than the natural 5` splice site of intron 3. A minor population of the IDS message was processed by using this cryptic splice site; however, no correctly spliced message was detected in leukocytes from this patient. The mutational topology of the IDS gene is presented. 46 refs., 6 figs., 2 tabs.

  18. Establishing Cephalometric Landmarks for the Translational Study of Le Fort-based Facial Transplantation in Swine: Enhanced applications using computer-assisted surgery and custom cutting guides

    Santiago, Gabriel F.; Susarla, Srinivas M.; Al Rakan, Mohammed; Coon, Devin; Rada, Erin M.; Sarhane, Karim; Shores, Jamie T.; Bonawitz, Steven C.; Cooney, Damon; Sacks, Justin; Murphy, Ryan J.; Fishman, Elliot K.; Brandacher, Gerald; Lee, WP Andrew; Liacouras, Peter; Grant, Gerald; Armand, Mehran; Gordon, Chad R.

    2014-01-01

    Background Le Fort-based, maxillofacial allotransplantation is a reconstructive alternative gaining clinical acceptance. However, the vast majority of single-jaw transplant recipients demonstrate less-than-ideal skeletal and dental relationships with suboptimal aesthetic harmony. The purpose of this study was to investigate reproducible cephalometric landmarks in a large animal model, where refinement of computer-assisted planning, intra-operative navigational guidance, translational bone osteotomies, and comparative surgical techniques could be performed. Methods Cephalometric landmarks that could be translated into the human craniomaxillofacial skeleton, and would remain reliable following maxillofacial osteotomies with mid-facial alloflap inset, were sought on six miniature swine. Le Fort I-and Le Fort III-based alloflaps were harvested in swine with osteotomies, and all alloflaps were either auto-replanted or transplanted. Cephalometric analyses were performed on lateral cephalograms pre- and post-operatively. Critical cephalometric data sets were identified with the assistance of surgical planning and virtual prediction software, and evaluated for reliability and translational predictability. Results Several pertinent landmarks and human analogues were identified including pronasale (PRN), zygion (Zy), parietale (PA), gonion (GO), gnathion (GN), lower incisior base (LIB), and alveolare (ALV). PA-PRN-ALV and PA-PRN-LIB were found to be reliable correlates of SNA and SNB measurements in humans, respectively. Conclusions There is a set of reliable cephalometric landmarks and measurement angles pertinent for utilization within a translational large animal model. These craniomaxillofacial landmarks will allow us to develop novel navigational software technology, improve our cutting guide designs, and explore new avenues for investigation and collaboration. Level of Evidence N/A (Large Animal Study) PMID:24445879

  19. Delta opioid receptor on equine sperm cells: subcellular localization and involvement in sperm motility analyzed by computer assisted sperm analyzer (CASA

    Lacalandra Giovanni M

    2010-06-01

    Full Text Available Abstract Background Opioid receptors and endogenous opioid peptides act not only in the control of nociceptive pathways, indeed several reports demonstrate the effects of opiates on sperm cell motility and morphology suggesting the importance of these receptors in the modulation of reproduction in mammals. In this study we investigated the expression of delta opioid receptors on equine spermatozoa by western blot/indirect immunofluorescence and its relationship with sperm cell physiology. Methods We analyzed viability, motility, capacitation, acrosome reaction and mitochondrial activity in the presence of naltrindole and DPDPE by means of a computer assisted sperm analyzer and a fluorescent confocal microscope. The evaluation of viability, capacitation and acrosome reaction was carried out by the double CTC/Hoechst staining, whereas mitochondrial activity was assessed by means of MitoTracker Orange dye. Results We showed that in equine sperm cells, delta opioid receptor is expressed as a doublet of 65 and 50 kDa molecular mass and is localized in the mid piece of tail; we also demonstrated that naltrindole, a delta opioid receptor antagonist, could be utilized in modulating several physiological parameters of the equine spermatozoon in a dose-dependent way. We also found that low concentrations of the antagonist increase sperm motility whereas high concentrations show the opposite effect. Moreover low concentrations hamper capacitation, acrosome reaction and viability even if the percentage of cells with active mitochondria seems to be increased; the opposite effect is exerted at high concentrations. We have also observed that the delta opioid receptor agonist DPDPE is scarcely involved in affecting the same parameters at the employed concentrations. Conclusions The results described in this paper add new important details in the comprehension of the mammalian sperm physiology and suggest new insights for improving reproduction and for

  20. The reliability of sensitive information provided by injecting drug users in a clinical setting: clinician-administered versus audio computer-assisted self-interviewing (ACASI).

    Islam, M Mofizul; Topp, Libby; Conigrave, Katherine M; van Beek, Ingrid; Maher, Lisa; White, Ann; Rodgers, Craig; Day, Carolyn A

    2012-01-01

    Research with injecting drug users (IDUs) suggests greater willingness to report sensitive and stigmatised behaviour via audio computer-assisted self-interviewing (ACASI) methods than during face-to-face interviews (FFIs); however, previous studies were limited in verifying this within the same individuals at the same time point. This study examines the relative willingness of IDUs to report sensitive information via ACASI and during a face-to-face clinical assessment administered in health services for IDUs. During recruitment for a randomised controlled trial undertaken at two IDU-targeted health services, assessments were undertaken as per clinical protocols, followed by referral of eligible clients to the trial, in which baseline self-report data were collected via ACASI. Five questions about sensitive injecting and sexual risk behaviours were administered to participants during both clinical interviews and baseline research data collection. "Percentage agreement" determined the magnitude of concordance/discordance in responses across interview methods, while tests appropriate to data format assessed the statistical significance of this variation. Results for all five variables suggest that, relative to ACASI, FFI elicited responses that may be perceived as more socially desirable. Discordance was statistically significant for four of the five variables examined. Participants who reported a history of sex work were more likely to provide discordant responses to at least one socially sensitive item. In health services for IDUs, information collection via ACASI may elicit more reliable and valid responses than FFI. Adoption of a universal precautionary approach to complement individually tailored assessment of and advice regarding health risk behaviours for IDUs may address this issue. PMID:22452446