Sample records for computer assisted system


    African Journals Online (AJOL)

    COMPUTER ASSISTED INVENTORY CONTROL SYSTEM. Alebachew Dessalegn and R. N. Roy. Department of Mechanical Engineering. Addis Ababa University. ABSTRACT. The basic purpose of holding inventories is to provide an essential decoupling between demand and unequal flow rate of materials in a supp~v ...

  2. System/360 Computer Assisted Network Scheduling (CANS) System (United States)

    Brewer, A. C.


    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.

  3. Terrace Layout Using a Computer Assisted System (United States)

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

  4. Computer-assisted design/computer-assisted manufacturing systems: A revolution in restorative dentistry. (United States)

    Sajjad, Arbaz


    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.

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

    Directory of Open Access Journals (Sweden)

    Arbaz Sajjad


    Full Text Available 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.

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

    Directory of Open Access Journals (Sweden)

    Abdul Azis Basri


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

  7. Computer Assistance for "Discovering" Formulas in System Engineering and Operator Theory

    National Research Council Canada - National Science Library

    Helton J.W; Foias M.C


    The objective of this paper is two-fold. First we present a methodology for using a combination of computer assistance and human intervention to discover highly algebraic theorems in operator, matrix, and linear systems engineering theory...

  8. Computer-Assisted English Learning System Based on Free Conversation by Topic (United States)

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


    This paper aims to describe a computer-assisted English learning system using chatbots and dialogue systems, which allow free conversation outside the topic without limiting the learner's flow of conversation. The evaluation was conducted by 20 experimenters. The performance of the system based on a free conversation by topic was measured by the…

  9. A Graphical User-Interface Development Tool for Intelligent Computer- Assisted Instruction Systems (United States)


    Assisted Instruction Systems by Francius Suwono Lieutenant Colonel, Indonesian AirForce B. S Aeronautics, Indonesian Air Force Academy, 1969 Submitted in...MORA 81] Moran, T P. , The Command Language Grammar : A representation for the user inerface of interactive computer systems, International Journal

  10. Graphic Representation of Musical Concepts: A Computer Assisted Instructional System. Final Report. (United States)

    Heller, Jack J.; And Others

    Computer Assisted Synthesizer System (CASS), a portable music synthesizer system which can produce tones from ordinary paper and pencil graphs, was developed and its usefulness for music instruction evaluated in this study. After completion of a pilot study to determine the feasibility of developing CASS and to run a trail test period, 28 fifth…

  11. Feasibility study of a computer-assisted radioguided surgery system (United States)

    Massari, R.; Trotta, C.; Trinci, G.; Sala, R.; Basso, A.; Zappa, E.; Scopinaro, F.; Soluri, A.


    This paper deals with the study of a system prototype that can be used as an auxiliary tool in radioguided surgery methods. The use of new technologies in radioguided surgery concern the exact positioning of the lesion to be exerted. This is possible, in operation theatre, thanks to portable scintigraphics devices or to radiation counters. Due to lack of a coordinate system in the operation field, it is difficult for the surgeon to localize the pathology after removing the detection instrument. The system proposed in this paper is composed mainly of three elements: a handheld, high-resolution gamma camera with a small Field Of View (FOV) based on Hamamatsu R8900-00-C12 Position Sensitive Photomultiplier Tube (PSPMT), a laser scanner for the reconstruction of the body district and a stereoscopic system for contactless surgical tool tracking. Analyzing a set of scintigraphic images, taken from different projections, it is possible to localize the three-dimensional position of the lesion. Thanks to the use of the scanner and image fusion techniques, the pathology is shown on a PC monitor correctly positioned with respect to the body surface. Using a couple of stereoscopic cameras, the surgical tool can be tracked and shown on the same monitor, so that the surgeon can know the instantaneous relative position between the tool and the pathology. Exploiting these systems, a navigation system prototype has been developed that is suitable for radioguided surgical application.

  12. Feasibility study of a computer-assisted radioguided surgery system

    Energy Technology Data Exchange (ETDEWEB)

    Massari, R.; Trotta, C. [Institute of Biomedical Engineering, CNR, Via Salaria Km 29.300, C.P. 10 00016 Monterotondo, Rome (Italy); Li-tech srl, Lauzacco Pavia di Udine (UD) (Italy); Trinci, G. [Institute of Biomedical Engineering, CNR, Via Salaria Km 29.300, C.P. 10 00016 Monterotondo, Rome (Italy); Sala, R.; Basso, A.; Zappa, E. [Politecnico di Milano, IV Facolta di Ingegneria, Dipartimento di Meccanica, Milan (Italy); Scopinaro, F. [Institute of Biomedical Engineering, CNR, Via Salaria Km 29.300, C.P. 10 00016 Monterotondo, Rome (Italy); Department of Radiological Sciences, University ' La Sapienza' Rome (Italy); Soluri, A. [Institute of Biomedical Engineering, CNR, Via Salaria Km 29.300, C.P. 10 00016 Monterotondo, Rome (Italy); Li-tech srl, Lauzacco Pavia di Udine (Italy)], E-mail:


    This paper deals with the study of a system prototype that can be used as an auxiliary tool in radioguided surgery methods. The use of new technologies in radioguided surgery concern the exact positioning of the lesion to be exerted. This is possible, in operation theatre, thanks to portable scintigraphics devices or to radiation counters. Due to lack of a coordinate system in the operation field, it is difficult for the surgeon to localize the pathology after removing the detection instrument. The system proposed in this paper is composed mainly of three elements: a handheld, high-resolution gamma camera with a small Field Of View (FOV) based on Hamamatsu R8900-00-C12 Position Sensitive Photomultiplier Tube (PSPMT), a laser scanner for the reconstruction of the body district and a stereoscopic system for contactless surgical tool tracking. Analyzing a set of scintigraphic images, taken from different projections, it is possible to localize the three-dimensional position of the lesion. Thanks to the use of the scanner and image fusion techniques, the pathology is shown on a PC monitor correctly positioned with respect to the body surface. Using a couple of stereoscopic cameras, the surgical tool can be tracked and shown on the same monitor, so that the surgeon can know the instantaneous relative position between the tool and the pathology. Exploiting these systems, a navigation system prototype has been developed that is suitable for radioguided surgical application.

  13. Computer Security Assistance Program (United States)


    Information COMPUTER SECURITY ASSISTANCE PROGRAM OPR: HQ AFCA/SYS (CMSgt Hogan) Certified by: HQ USAF/SCXX (Lt Col Francis X. McGovern) Pages: 5...Distribution: F This instruction implements Air Force Policy Directive (AFPD) 33-2, Information Protection, establishes the Air Force Computer Security Assistance...Force single point of contact for reporting and handling computer security incidents and vulnerabilities including AFCERT advisories and Defense

  14. Computer-assisted knowledge acquisition for hypermedia systems (United States)

    Steuck, Kurt


    The usage of procedural and declarative knowledge to set up the structure or 'web' of a hypermedia environment is described. An automated knowledge acquisition tool was developed that helps a knowledge engineer elicit and represent an expert's knowledge involved in performing procedural tasks. The tool represents both procedural and prerequisite, declarative knowledge that supports each activity performed by the expert. This knowledge is output and subsequently read by a hypertext scripting language to generate the link between blank, but labeled cards. Each step of the expert's activity and each piece of supporting declarative knowledge is set up as an empty node. An instructional developer can then enter detailed instructional material concerning each step and declarative knowledge into these empty nodes. Other research is also described that facilitates the translation of knowledge from one form into a form more readily useable by computerized systems.

  15. Computer-assisted instruction

    NARCIS (Netherlands)

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


    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

  16. Computer assisted medical history taking

    NARCIS (Netherlands)

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


    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.

  17. Computer Assisted Parallel Program Generation

    CERN Document Server

    Kawata, Shigeo


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

  18. Computer-assisted neurosurgery system: Wayne State University hardware and software configuration. (United States)

    Zamorano, L; Jiang, Z; Kadi, A M


    Computer-assisted neurosurgery uses the latest technological advancements in imaging, computers, mechanics, and electronics to improve the accuracy and reduce the invasiveness and risk of neurosurgical procedures. We describe the Wayne State University, Detroit, Michigan, computer-assisted neurosurgical system with the emphasis on software and discuss the theory guiding the development of this system and its application in real-time position tracking systems. Our system consists of the Neurological Surgery Planning System (NSPS) software which we developed at our medical center and three types of position tracking systems: the Zamorano-Dujovny (Z-D) are digitizer for frame-based procedures, an articulated arm, and an infrared-based digitizer for frameless procedures. The NSPS software is designed to offer neurosurgeons a safe and accurate method to approach intracranial lesions by preoperatively planning a surgical trajectory. Software consisting of the most advanced technologies in computer vision, computer imaging/graphics, and stereotactic numeric analysis forms the core of the system. Capabilities for correlating data from imaging studies to facilitate image reconstruction, image mapping, and three-dimensional (3D) visualization of target volumes enable the neurosurgeon to simulate surgical procedures into a preoperative protocol to be used during surgery, both to follow the preplanned trajectory and to track the position of surgical instruments in real-time on the computer monitor. The tracking systems position and orient the surgical instruments relative to the patient's head. With these devices, the display of the surgical instruments together with the virtual images create an excellent intraoperative tool.

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

    Directory of Open Access Journals (Sweden)

    Zhang Xi Wen


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

  20. Non invasive Brain-Computer Interface system: towards its application as assistive technology


    Cincotti, Febo; Mattia, Donatella; Aloise, Fabio; Bufalari, Simona; Schalk, Gerwin; Oriolo, Giuseppe; Cherubini, Andrea; Marciani, Maria Grazia; Babiloni, Fabio


    The quality of life of people suffering from severe motor disabilities can benefit from the use of current assistive technology capable of ameliorating communication, house-environment management and mobility, according to the user's residual motor abilities. Brain Computer Interfaces (BCIs) are systems that can translate brain activity into signals that control external devices. Thus they can represent the only technology for severely paralyzed patients to increase or maintain their communic...

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

    Directory of Open Access Journals (Sweden)

    Jhing-Fa Wang


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

  2. Enhanced cephalomedullary nail lag screw placement and intraoperative tip-apex distance measurement with a novel computer assisted surgery system. (United States)

    Kuhl, Mitchell; Beimel, Claudia


    The goal of this study was to evaluate the ability of a novel computer assisted surgery system to guide ideal placement of a lag screw during cephalomedullary nailing and then accurately measure the tip-apex distance (TAD) measurement intraoperatively. Retrospective case review. Level II trauma hospital. The initial 98 consecutive clinical cases treated with a cephalomedullary nail in conjunction with a novel computer assisted surgery system were retrospectively reviewed. A novel computer assisted surgery system was utilized to enhance lag screw placement during cephalomedullary nailing procedures. The computer assisted surgery system calculates the TAD intraoperatively after final lag screw placement. The ideal TAD was considered to be within a range of 5mm-20mm. The ability of the computer assisted surgery system (CASS) to assist in placement of a lag screw within the ideal TAD was evaluated. Intraoperative TAD measurements provided by the computer assisted surgery system were then compared to standard postoperative TAD measurements on PACS (picture archiving and communication system) images to determine whether these measurements are equivalent. 79 cases (80.6%) were available with complete information for a retrospective review. All cases had CASS TAD and PACS TAD measurements >5mm and<20mm. In addition, no significant difference could be detected between the intraoperative CASS TAD and the postoperative PACS TAD (p=0.374, Wilcoxon Test; p=0.174, paired T-Test). A cut-out rate of 0% was observed in all patients who were treated with CASS in this case series (95% CI: 0 - 3.01%). The novel computer assisted surgery system tested here is an effective and reliable adjunct that can be utilized for optimal lag screw placement in cephalomedullary nailing procedures. The computer assisted surgery system provides an accurate intraoperative TAD measurement that is equivalent to the standard postoperative measurement utilizing PACS images. Therapeutic Level IV. Copyright

  3. Early experiences of endoscopic procedures in general surgery assisted by a computer-enhanced surgical system. (United States)

    Hashizume, M; Shimada, M; Tomikawa, M; Ikeda, Y; Takahashi, I; Abe, R; Koga, F; Gotoh, N; Konishi, K; Maehara, S; Sugimachi, K


    We performed a variety of complete total endoscopic general surgical procedures, including colon resection, distal gastrectomy, and splenectomy, successfully with the assistance of the da Vinci computer-enhanced surgical system. The robotic system allowed us to manipulate the endoscopic instruments as effectively as during open surgery. It enhanced visualization of both the operative field and precision of the necessary techniques, as well as being less stressful for the endoscopic operating team. This technological innovation can therefore help surgeons overcome many of the difficulties associated with the endoscopic approach and thus has the potential to enable more precise, safer, and more minimally invasive surgery in the future.

  4. Intelligent Decisional Assistant that Facilitate the Choice of a Proper Computer System Applied in Busines

    Directory of Open Access Journals (Sweden)

    Nicolae MARGINEAN


    Full Text Available The choice of a proper computer system is not an easy task for a decider. One reason could be the present market development of computer systems applied in business. The big number of the Romanian market players determines a big number of computerized products, with a multitude of various properties. Our proposal tries to optimize and facilitate this decisional process within an e-shop where are sold IT packets applied in business, building an online decisional assistant, a special component conceived to facilitate the decision making needed for the selection of the pertinent IT package that fits the requirements of one certain business, described by the decider. The user interacts with the system as an online buyer that visit an e-shop where are sold IT package applied in economy.

  5. Computer-assisted photogrammetric mapping systems for geologic studies-A progress report (United States)

    Pillmore, C.L.; Dueholm, K.S.; Jepsen, H.S.; Schuch, C.H.


    Photogrammetry has played an important role in geologic mapping for many years; however, only recently have attempts been made to automate mapping functions for geology. Computer-assisted photogrammetric mapping systems for geologic studies have been developed and are currently in use in offices of the Geological Survey of Greenland at Copenhagen, Denmark, and the U.S. Geological Survey at Denver, Colorado. Though differing somewhat, the systems are similar in that they integrate Kern PG-2 photogrammetric plotting instruments and small desk-top computers that are programmed to perform special geologic functions and operate flat-bed plotters by means of specially designed hardware and software. A z-drive capability, in which stepping motors control the z-motions of the PG-2 plotters, is an integral part of both systems. This feature enables the computer to automatically position the floating mark on computer-calculated, previously defined geologic planes, such as contacts or the base of coal beds, throughout the stereoscopic model in order to improve the mapping capabilities of the instrument and to aid in correlation and tracing of geologic units. The common goal is to enhance the capabilities of the PG-2 plotter and provide a means by which geologists can make conventional geologic maps more efficiently and explore ways to apply computer technology to geologic studies. ?? 1981.

  6. Ethical Issues Involved with the Use of Computer-Assisted Counseling, Testing, and Guidance Systems. (United States)

    Sampson, James P.; Pyle, K. Richard


    Discusses the growing use of computers in counseling, testing, and guidance. Examines potential ethical problems focusing on confidentiality of client data and the use of computer-assisted testing. Outlines principles for ethical use of computer applications emphasizing the need for counselor intervention. (Author/RC)

  7. Non invasive Brain-Computer Interface system: towards its application as assistive technology (United States)

    Cincotti, Febo; Mattia, Donatella; Aloise, Fabio; Bufalari, Simona; Schalk, Gerwin; Oriolo, Giuseppe; Cherubini, Andrea; Marciani, Maria Grazia; Babiloni, Fabio


    The quality of life of people suffering from severe motor disabilities can benefit from the use of current assistive technology capable of ameliorating communication, house-environment management and mobility, according to the user's residual motor abilities. Brain Computer Interfaces (BCIs) are systems that can translate brain activity into signals that control external devices. Thus they can represent the only technology for severely paralyzed patients to increase or maintain their communication and control options. Here we report on a pilot study in which a system was implemented and validated to allow disabled persons to improve or recover their mobility (directly or by emulation) and communication within the surrounding environment. The system is based on a software controller that offers to the user a communication interface that is matched with the individual's residual motor abilities. Patients (n=14) with severe motor disabilities due to progressive neurodegenerative disorders were trained to use the system prototype under a rehabilitation program carried out in a house-like furnished space. All users utilized regular assistive control options (e.g., microswitches or head trackers). In addition, four subjects learned to operate the system by means of a non-invasive EEG-based BCI. This system was controlled by the subjects' voluntary modulations of EEG sensorimotor rhythms recorded on the scalp; this skill was learnt even though the subjects have not had control over their limbs for a long time. We conclude that such a prototype system, which integrates several different assistive technologies including a BCI system, can potentially facilitate the translation from pre-clinical demonstrations to a clinical useful BCI. PMID:18394526

  8. Computer-Assisted Diagnosis System for Breast Cancer in Computed Tomography Laser Mammography (CTLM)

    National Research Council Canada - National Science Library

    Jalalian, Afsaneh; Mashohor, Syamsiah; Mahmud, Rozi; Karasfi, Babak; Iqbal Saripan, M; Ramli, Abdul Rahman


    ... to the structural complexity in appearance. The purpose of this study is to develop a computer-aided diagnosis framework to enhance the performance of radiologist in the interpretation of CTLM images...

  9. Generating rate equations for complex enzyme systems by a computer-assisted systematic method

    Directory of Open Access Journals (Sweden)

    Beard Daniel A


    Full Text Available Abstract Background While the theory of enzyme kinetics is fundamental to analyzing and simulating biochemical systems, the derivation of rate equations for complex mechanisms for enzyme-catalyzed reactions is cumbersome and error prone. Therefore, a number of algorithms and related computer programs have been developed to assist in such derivations. Yet although a number of algorithms, programs, and software packages are reported in the literature, one or more significant limitation is associated with each of these tools. Furthermore, none is freely available for download and use by the community. Results We have implemented an algorithm based on the schematic method of King and Altman (KA that employs the topological theory of linear graphs for systematic generation of valid reaction patterns in a GUI-based stand-alone computer program called KAPattern. The underlying algorithm allows for the assumption steady-state, rapid equilibrium-binding, and/or irreversibility for individual steps in catalytic mechanisms. The program can automatically generate MathML and MATLAB output files that users can easily incorporate into simulation programs. Conclusion A computer program, called KAPattern, for generating rate equations for complex enzyme system is a freely available and can be accessed at

  10. The management of endodontically treated teeth using a Computer-Aided Design and Computer-Assisted Manufacturing/Computer-Aided Design and Computer-Integrated Manufacturing system. (United States)

    Foerster, J G; von Gonten, A S; Robert, G H


    This article introduces a new approach for restoring endodontically treated posterior teeth. Significantly reduced natural tooth structure often remains not only because of previous restorative measures but also because of endodontic procedures. Cast restorations for these teeth are almost universally recommended. The exception to this is the rare instance in which only conservative endodontic access openings exist in teeth presenting with no former existing restorations. Typically, multiple clinical appointments are required to complete the final cast restoration. This article presents Computer-Aided Design and Computer-Assisted Manufacturing/Computer-Aided Design and Computer-Integrated Manufacturing applications for restorative dentistry that provide the necessary care in an expeditious manner.

  11. Computer-assisted design for scaling up systems based on DNA reaction networks. (United States)

    Aubert, Nathanaël; Mosca, Clément; Fujii, Teruo; Hagiya, Masami; Rondelez, Yannick


    In the past few years, there have been many exciting advances in the field of molecular programming, reaching a point where implementation of non-trivial systems, such as neural networks or switchable bistable networks, is a reality. Such systems require nonlinearity, be it through signal amplification, digitalization or the generation of autonomous dynamics such as oscillations. The biochemistry of DNA systems provides such mechanisms, but assembling them in a constructive manner is still a difficult and sometimes counterintuitive process. Moreover, realistic prediction of the actual evolution of concentrations over time requires a number of side reactions, such as leaks, cross-talks or competitive interactions, to be taken into account. In this case, the design of a system targeting a given function takes much trial and error before the correct architecture can be found. To speed up this process, we have created DNA Artificial Circuits Computer-Assisted Design (DACCAD), a computer-assisted design software that supports the construction of systems for the DNA toolbox. DACCAD is ultimately aimed to design actual in vitro implementations, which is made possible by building on the experimental knowledge available on the DNA toolbox. We illustrate its effectiveness by designing various systems, from Montagne et al.'s Oligator or Padirac et al.'s bistable system to new and complex networks, including a two-bit counter or a frequency divider as well as an example of very large system encoding the game Mastermind. In the process, we highlight a variety of behaviours, such as enzymatic saturation and load effect, which would be hard to handle or even predict with a simpler model. We also show that those mechanisms, while generally seen as detrimental, can be used in a positive way, as functional part of a design. Additionally, the number of parameters included in these simulations can be large, especially in the case of complex systems. For this reason, we included the

  12. Performance of an Automated Polysomnography Scoring System Versus Computer-Assisted Manual Scoring (United States)

    Malhotra, Atul; Younes, Magdy; Kuna, Samuel T.; Benca, Ruth; Kushida, Clete A.; Walsh, James; Hanlon, Alexandra; Staley, Bethany; Pack, Allan I.; Pien, Grace W.


    Study Objectives: Manual scoring of polysomnograms (PSG) is labor intensive and has considerable variance between scorers. Automation of scoring could reduce cost and improve reproducibility. The purpose of this study was to compare a new automated scoring system (YST-Limited, Winnipeg, Canada) with computer-assisted manual scoring. Design: Technical assessment. Setting: Five academic medical centers. Participants: N/A. Interventions: N/A. Measurements and Results: Seventy PSG files were selected at University of Pennsylvania (Penn) and distributed to five US academic sleep centers. Two blinded technologists from each center scored each file. Automatic scoring was performed at Penn by a YST Limited technician using a laptop containing the software. Variables examined were sleep stages, arousals, and apnea-hypopnea index (AHI) using three methods of identifying hypopneas. Automatic scores were not edited and were compared to the average scores of the 10 technologists. Intraclass correlation coefficient (ICC) was obtained for the 70 pairs and compared to across-sites ICCs for manually scored results. ICCs for automatic versus manual scoring were > 0.8 for total sleep time, stage N2, and nonrapid eye movement arousals and > 0.9 for AHI scored by primary and secondary American Academy of Sleep Medicine criteria. ICCs for other variables were not as high but were comparable to the across-site ICCs for manually scored results. Conclusion: The automatic system yielded results that were similar to those obtained by experienced technologists. Very good ICCs were obtained for many primary PSG outcome measures. This automated scoring software, particularly if supplemented with manual editing, may increase laboratory efficiency and standardize PSG scoring results within and across sleep centers. Citation: Malhotra A; Younes M; Kuna ST; Benca R; Kushida CA; Walsh J; Hanlon A; Staley B; Pack AI; Pien GW. Performance of an automated polysomnography scoring system versus computer-assisted

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

    Directory of Open Access Journals (Sweden)

    Huynh Toan


    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

  14. Evaluation of the Accuracy and Precision of a Next Generation Computer-Assisted Surgical System. (United States)

    Angibaud, Laurent D; Dai, Yifei; Liebelt, Ralph A; Gao, Bo; Gulbransen, Scott W; Silver, Xeve S


    Computer-assisted orthopaedic surgery (CAOS) improves accuracy and reduces outliers in total knee arthroplasty (TKA). However, during the evaluation of CAOS systems, the error generated by the guidance system (hardware and software) has been generally overlooked. Limited information is available on the accuracy and precision of specific CAOS systems with regard to intraoperative final resection measurements. The purpose of this study was to assess the accuracy and precision of a next generation CAOS system and investigate the impact of extra-articular deformity on the system-level errors generated during intraoperative resection measurement. TKA surgeries were performed on twenty-eight artificial knee inserts with various types of extra-articular deformity (12 neutral, 12 varus, and 4 valgus). Surgical resection parameters (resection depths and alignment angles) were compared between postoperative three-dimensional (3D) scan-based measurements and intraoperative CAOS measurements. Using the 3D scan-based measurements as control, the accuracy (mean error) and precision (associated standard deviation) of the CAOS system were assessed. The impact of extra-articular deformity on the CAOS system measurement errors was also investigated. The pooled mean unsigned errors generated by the CAOS system were equal or less than 0.61 mm and 0.64° for resection depths and alignment angles, respectively. No clinically meaningful biases were found in the measurements of resection depths (system investigated. This study presented a set of methodology and workflow to assess the system-level accuracy and precision of CAOS systems. The data demonstrated that the CAOS system investigated can offer accurate and precise intraoperative measurements of TKA resection parameters, regardless of the presence of extra-articular deformity in the knee.

  15. Computer Assisted Telephone Applications

    Directory of Open Access Journals (Sweden)

    Dražen Kovačević


    Full Text Available Computer resources represent a significant factor in the developmentof a society. Their distribution to users' locationsand direct connections through telecommunication systemssubstantially increase their significance and role.Modem telecommunication systems are integral systemsfor voice and data transmission. This paper studies data transferfrom the technical, technological and organisational aspect.Due to the wide scope of the topic, only some relevant data arementioned that dete1mine the characteristics of certain datatransfer systems.

  16. Computer Assisted Medical Diagnosis (CAMD) System. Version 1.0. User’s Guide (United States)



  17. Diabetes Patients' Experiences With the Implementation of Insulin Therapy and Their Perceptions of Computer-Assisted Self-Management Systems for Insulin Therapy

    NARCIS (Netherlands)

    Simon, Airin Cr; Gude, Wouter T.; Holleman, Frits; Hoekstra, Joost Bl; Peek, Niels


    Background: Computer-assisted decision support is an emerging modality to assist patients with type 2 diabetes mellitus (T2DM) in insulin self-titration (ie, self-adjusting insulin dose according to daily blood glucose levels). Computer-assisted insulin self-titration systems mainly focus on helping

  18. Validation of a novel computer-assisted sperm analysis (CASA) system using multitarget-tracking algorithms. (United States)

    Tomlinson, Mathew James; Pooley, Karen; Simpson, Tracey; Newton, Thomas; Hopkisson, James; Jayaprakasan, Kannamanadias; Jayaprakasan, Rajisha; Naeem, Asad; Pridmore, Tony


    To determine the accuracy and precision of a novel computer-assisted sperm analysis (CASA) system by comparison with existing recommended manual methods. Prospective study using comparative measurements of sperm concentration and motility on latex beads and immotile and motile sperm. Tertiary referral fertility center with strong academic links. Sperm donors and male partners of couples attending for fertility investigations. None. Achievement of Accubead target value for high and low concentration suspensions. Repeatability as demonstrated by coefficients of variation and intraclass correlation coefficients. Correlation and limits of agreement between CASA and manual methods. The CASA measurements of latex beads and sperm concentrations demonstrated a high level of accuracy and repeatability. Repeated Accubead measurements attained the required target value (mean difference from target of 2.61% and 3.71% for high- and low-concentration suspensions, respectively) and were highly reproducible. Limits of agreement analysis suggested that manual and CASA counts compared directly could be deemed to be interchangeable. Manual and CASA motility measurements were highly correlated for grades a, b, and d but could not be deemed to be interchangeable, and manual motility estimates were consistently higher for motile sperm. The novel CASA system was able to provide semen quality measurements for sperm concentration and motility measurements which were at least as reliable as current manual methods. Copyright 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.

  19. Real-time multimodal retinal image registration for a computer-assisted laser photocoagulation system. (United States)

    Broehan, A Martina; Rudolph, Tobias; Amstutz, Christoph A; Kowal, Jens H


    An algorithm for the real-time registration of a retinal video sequence captured with a scanning digital ophthalmoscope (SDO) to a retinal composite image is presented. This method is designed for a computer-assisted retinal laser photocoagulation system to compensate for retinal motion and hence enhance the accuracy, speed, and patient safety of retinal laser treatments. The procedure combines intensity and feature-based registration techniques. For the registration of an individual frame, the translational frame-to-frame motion between preceding and current frame is detected by normalized cross correlation. Next, vessel points on the current video frame are identified and an initial transformation estimate is constructed from the calculated translation vector and the quadratic registration matrix of the previous frame. The vessel points are then iteratively matched to the segmented vessel centerline of the composite image to refine the initial transformation and register the video frame to the composite image. Criteria for image quality and algorithm convergence are introduced, which assess the exclusion of single frames from the registration process and enable a loss of tracking signal if necessary. The algorithm was successfully applied to ten different video sequences recorded from patients. It revealed an average accuracy of 2.47 ± 2.0 pixels (∼23.2 ± 18.8 μm) for 2764 evaluated video frames and demonstrated that it meets the clinical requirements.

  20. Computer-assisted craniomaxillofacial surgery. (United States)

    Edwards, Sean P


    Computer-assisted surgery (CAS) describes all forms of surgery planning or execution that incorporate various forms of advanced imaging, software, analysis, and planning and, in some cases, rapid prototyping technology, robotics, and image-guidance systems. Innovation is progressing rapidly, and new forms of technology continue to be incorporated and evaluated for their value in improving daily operations. This article reviews imaging, enhanced three-dimensional diagnostics, tactile models, CAS concepts, reconstructive surgery, bone flap shaping, distraction osteogenesis, and orthognathic surgery in relation to craniomaxillofacial surgery. Copyright (c) 2010 Elsevier Inc. All rights reserved.

  1. Different computer-assisted sperm analysis (CASA) systems highly influence sperm motility parameters. (United States)

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


    In this study, we examined different computer-assisted sperm analysis (CASA) systems (CRISMAS, Hobson Sperm Tracker, and Image J CASA) on the exact same video recordings to evaluate the differences in sperm motility parameters related to the specific CASA used. To cover a wide range of sperm motility parameters, we chose 12-second video recordings at 25 and 50 Hz frame rates after sperm motility activation using three taxonomically distinct fish species (sterlet: Acipenser ruthenus L.; common carp: Cyprinus carpio L.; and rainbow trout: Oncorhynchus mykiss Walbaum) that are characterized by essential differences in sperm behavior during motility. Systematically higher values of velocity and beat cross frequency (BCF) were observed in video recordings obtained at 50 Hz frame frequency compared with 25 Hz for all three systems. Motility parameters were affected by the CASA and species used for analyses. Image J and CRISMAS calculated higher curvilinear velocity (VCL) values for rainbow trout and common carp at 25 Hz frequency compared with the Hobson Sperm Tracker, whereas at 50 Hz, a significant difference was observed only for rainbow trout sperm recordings. No significant difference was observed between the CASA systems for sterlet sperm motility at 25 and 50 Hz. Additional analysis of 1-second segments taken at three time points (1, 6, and 12 seconds of the recording) revealed a dramatic decrease in common carp and rainbow trout sperm speed. The motility parameters of sterlet spermatozoa did not change significantly during the 12-second motility period and should be considered as a suitable model for longer motility analyses. Our results indicated that the CASA used can affect motility results even when the same motility recordings are used. These results could be critically altered by the recording quality, time of analysis, and frame rate of camera, and could result in erroneous conclusions. Copyright © 2013 Elsevier Inc. All rights reserved.

  2. MED-NODE : A computer-assisted melanoma diagnosis system using non-dermoscopic images

    NARCIS (Netherlands)

    Giotis, Ioannis; Molders, Nynke; Land, Sander; Biehl, Michael; Jonkman, Marcel F.; Petkov, Nicolai


    Melanoma is one of the most aggressive types of skin cancer and in many cases it is difficult to differentiate from benign naevi. In this contribution we present a decision support (expert) system, which we call MED-NODE, able to assist physicians with this challenging task. The proposed system

  3. Preliminary development of a workstation for craniomaxillofacial surgical procedures: introducing a computer-assisted planning and execution system. (United States)

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


    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 and other related craniomaxillofacial procedures. 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. 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. The initial development of the CAPE workstation demonstrated that 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 for numerous

  4. Computer-assisted Crystallization. (United States)

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


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

  5. Computer aided design, analysis and experimental investigation of membrane assisted batch reaction-separation systems

    DEFF Research Database (Denmark)

    Mitkowski, Piotr Tomasz; Buchaly, Carsten; Kreis, Peter


    Membrane assisted batch reaction operation offers an interesting option for equilibrium limited reaction systems in chemical and biochemical manufacturing by selective removal of one of the products and thereby increasing the product yield. The design of such hybrid systems need to take into acco...... and separation functionalities and to design/analyse the hybrid scheme. The generated hybrid scheme has been validated through experiments involving an esterification reaction....

  6. Physics and engineering aspects of cell and tissue imaging systems: microscopic devices and computer assisted diagnosis. (United States)

    Chen, Xiaodong; Ren, Liqiang; Zheng, Bin; Liu, Hong


    The conventional optical microscopes have been used widely in scientific research and in clinical practice. The modern digital microscopic devices combine the power of optical imaging and computerized analysis, archiving and communication techniques. It has a great potential in pathological examinations for improving the efficiency and accuracy of clinical diagnosis. This chapter reviews the basic optical principles of conventional microscopes, fluorescence microscopes and electron microscopes. The recent developments and future clinical applications of advanced digital microscopic imaging methods and computer assisted diagnosis schemes are also discussed.

  7. Computer assisted radiology and surgery. CARS 2010

    Energy Technology Data Exchange (ETDEWEB)



    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.

  8. Comparative analysis of classifiers for developing an adaptive computer-assisted EEG analysis system for diagnosing epilepsy. (United States)

    Ahmad, Malik Anas; Ayaz, Yasar; Jamil, Mohsin; Omer Gillani, Syed; Rasheed, Muhammad Babar; Imran, Muhammad; Khan, Nadeem Ahmed; Majeed, Waqas; Javaid, Nadeem


    Computer-assisted analysis of electroencephalogram (EEG) has a tremendous potential to assist clinicians during the diagnosis of epilepsy. These systems are trained to classify the EEG based on the ground truth provided by the neurologists. So, there should be a mechanism in these systems, using which a system's incorrect markings can be mentioned and the system should improve its classification by learning from them. We have developed a simple mechanism for neurologists to improve classification rate while encountering any false classification. This system is based on taking discrete wavelet transform (DWT) of the signals epochs which are then reduced using principal component analysis, and then they are fed into a classifier. After discussing our approach, we have shown the classification performance of three types of classifiers: support vector machine (SVM), quadratic discriminant analysis, and artificial neural network. We found SVM to be the best working classifier. Our work exhibits the importance and viability of a self-improving and user adapting computer-assisted EEG analysis system for diagnosing epilepsy which processes each channel exclusive to each other, along with the performance comparison of different machine learning techniques in the suggested system.

  9. Computer Assisted Instruction Authoring System. Final Report. Appendix A: Photographs of Some Screen Displays. Experimental Authoring System (XAS). Appendix B: Author Manual for the DERS Interactive Experimental Authoring System (XAS). Appendix C: Syntax of Implementation Two. Computer Assisted Instruction Authoring System. (United States)

    Hunka, S.

    This project report details the design of an interactive authoring system for the development of computer assisted instructional (CAI) software. This system is possible because the development of more powerful computing and software systems has facilitated authoring systems which allow the development of courseware in an interactive mode and…

  10. Comparative Analysis of Classifiers for Developing an Adaptive Computer-Assisted EEG Analysis System for Diagnosing Epilepsy

    Directory of Open Access Journals (Sweden)

    Malik Anas Ahmad


    Full Text Available Computer-assisted analysis of electroencephalogram (EEG has a tremendous potential to assist clinicians during the diagnosis of epilepsy. These systems are trained to classify the EEG based on the ground truth provided by the neurologists. So, there should be a mechanism in these systems, using which a system’s incorrect markings can be mentioned and the system should improve its classification by learning from them. We have developed a simple mechanism for neurologists to improve classification rate while encountering any false classification. This system is based on taking discrete wavelet transform (DWT of the signals epochs which are then reduced using principal component analysis, and then they are fed into a classifier. After discussing our approach, we have shown the classification performance of three types of classifiers: support vector machine (SVM, quadratic discriminant analysis, and artificial neural network. We found SVM to be the best working classifier. Our work exhibits the importance and viability of a self-improving and user adapting computer-assisted EEG analysis system for diagnosing epilepsy which processes each channel exclusive to each other, along with the performance comparison of different machine learning techniques in the suggested system.

  11. CADE--A System for Computer-Assisted Distance Education: Development, Design, and Evaluation of the System. (United States)

    Baath, John A.; Mansson, Nils-Ove

    A three-stage, computer-assisted distance education (CADE) project was undertaken to design a prototype of CADE that would improve the two-way communication in correspondence education in three respects: (1) the quality of the tutors' comments as to feedback effectiveness and motivational aspects, (2) the turn-round time of students' solutions to…

  12. Computer assisted tutoring in radiology

    Energy Technology Data Exchange (ETDEWEB)

    Jeffery, N


    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

  13. Computer-assisted abdominal surgery: new technologies. (United States)

    Kenngott, H G; Wagner, M; Nickel, F; Wekerle, A L; Preukschas, A; Apitz, M; Schulte, T; Rempel, R; Mietkowski, P; Wagner, F; Termer, A; Müller-Stich, Beat P


    Computer-assisted surgery is a wide field of technologies with the potential to enable the surgeon to improve efficiency and efficacy of diagnosis, treatment, and clinical management. This review provides an overview of the most important new technologies and their applications. A MEDLINE database search was performed revealing a total of 1702 references. All references were considered for information on six main topics, namely image guidance and navigation, robot-assisted surgery, human-machine interface, surgical processes and clinical pathways, computer-assisted surgical training, and clinical decision support. Further references were obtained through cross-referencing the bibliography cited in each work. Based on their respective field of expertise, the authors chose 64 publications relevant for the purpose of this review. Computer-assisted systems are increasingly used not only in experimental studies but also in clinical studies. Although computer-assisted abdominal surgery is still in its infancy, the number of studies is constantly increasing, and clinical studies start showing the benefits of computers used not only as tools of documentation and accounting but also for directly assisting surgeons during diagnosis and treatment of patients. Further developments in the field of clinical decision support even have the potential of causing a paradigm shift in how patients are diagnosed and treated.

  14. Application of a computer-assisted surgical navigation system in temporomandibular joint ankylosis surgery: a retrospective study. (United States)

    He, Y; Huang, T; Zhang, Y; An, J; He, L


    This retrospective study evaluated the effect of surgical computer-assisted navigation in temporomandibular joint (TMJ) ankylosis gap arthroplasty. Eighteen patients (25 sides) with bony ankylosis who underwent surgical treatment under computer-assisted navigation (navigation group) from May 2011 to April 2013 were assessed, along with 19 such patients (25 sides) treated without computer-assisted navigation (non-navigation group) from March 2009 to April 2011. The navigation group patients underwent surgery with the preservation of ≥3mm bone thickness in the skull base and anterior wall of the external auditory canal. Postoperatively, computed tomography (CT) was used to measure the residual bone thickness in the skull base and anterior wall of the external auditory canal. Maximum mouth opening (MMO) changes were evaluated at >1 year of follow-up. Postoperative CT measurements showed that the lowest skull base thickness in the navigation group was significantly lower than that in the non-navigation group (3.86±1.95mm vs. 6.01±3.07mm, P=0.009). The lowest thicknesses of the anterior wall of the external auditory canal were similar in the two groups. Postoperative follow-up showed similar average MMO in the two groups. Therefore, with the navigation system, TMJ ankylosis gap arthroplasty can achieve more extensive removal of the ankylosed bone, at least towards the skull base, under the premise of ensuring a safety distance of 3mm. Copyright © 2016 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

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

    Directory of Open Access Journals (Sweden)

    John Lowe


    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.

  16. Contemporary issues for experimental design in assessment of medical imaging and computer-assist systems (United States)

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


    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

  17. Computer assisted gamma and X-ray tomography: Applications to multiphase flow systems

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, S.B.; Dudukovic, M.


    In process vessels, involving two or three phases it is often important not only to know the volume fraction (holdup) of each phase but also the spatial distribution of such holdups. This information is needed in control, trouble shooting and assessment of flow patterns and can be observed noninvasively by the application of Computed Tomography (CT). This report presents a complete overview of X-ray and gamma ray transmission tomography principles, equipment design to specific tasks and application in process industry. The fundamental principles of tomography, the algorithms for image reconstruction, the measurement method and the possible sources of error are discussed in detail. A case study highlights the methodology involved in designing a scanning system for the study of a given process unit, e.g., reactor, separations column etc. Results obtained in the authors` laboratory for the gas holdup distribution in bubble columns are also presented. Recommendations are made for the Advanced Fuels Development Unit (AFDU) in LaPorte, TX.

  18. 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. (United States)

    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…

  19. Computer-assisted identification and volumetric quantification of dynamic contrast enhancement in brain MRI: an interactive system (United States)

    Wu, Shandong; Avgeropoulos, Nicholas G.; Rippe, David J.


    We present a dedicated segmentation system for tumor identification and volumetric quantification in dynamic contrast brain magnetic resonance (MR) scans. Our goal is to offer a practically useful tool at the end of clinicians in order to boost volumetric tumor assessment. The system is designed to work in an interactive mode such that maximizes the integration of computing capacity and clinical intelligence. We demonstrate the main functions of the system in terms of its functional flow and conduct preliminary validation using a representative pilot dataset. The system is inexpensive, user-friendly, easy to deploy and integrate with picture archiving and communication systems (PACS), and possible to be open-source, which enable it to potentially serve as a useful assistant for radiologists and oncologists. It is anticipated that in the future the system can be integrated into clinical workflow so that become routine available to help clinicians make more objective interpretations of treatment interventions and natural history of disease to best advocate patient needs.

  20. CARE - computer aided reservoir engineering. An integrated approach for a computer assisted underground gas storage management system

    Energy Technology Data Exchange (ETDEWEB)

    Zemke, J.; Boor, C.; Lenk, G. [UGS GmbH, Mittenwald (Germany); Schmidt, H.W. [Elpro AG (Germany)


    The CARE software is an effective assistant for optimal management of an underground gas storage facility that is customized to the specific characteristics of each reservoir and customer's requirements. Developed from many years of practical experience of the storage operation, reservoir determination and well parameters, CARE ensures an optimal operation mode, which increases the storage performance and permit a longer durability of each well completion. Apart from cost saving effects the operation risk can be reduced by early recognition of failures. The program is modular developed and can be arranged according to customer's specifications. The most comprehensive tool is the process control module, which enables the evaluation and analysis of all relevant data, determination of target and limiting values as well as advanced prognosis function. Therefore with the assistance of CARE the underground storage facility could be operated almost automatically. All relevant technical and geological data as well as available historical measured values are stored in a module-spreading data base, which is currently updated. The report generator creates templates in accordance with the customer's requirements, which can be converted into standard documents or diagrams for the use of management reports or authorities. Moreover there is a package of further high-capacity applications. Interactive coupling with 3-D reservoir simulation is also possible. In this report exemplary of the realisation of well pass and well test are performed. The well pass module provides quick access to all specific geological and well data. The survey over the entire well is just as possible as the zoom in to a special section. (orig.)

  1. Computer-assisted evaluation of pulmonary emphysema in CT scans: comparison between a locally developed system and a freeware system

    Energy Technology Data Exchange (ETDEWEB)

    Felix, John Hebert da Silva; Cortez, Paulo Cesar; Costa, Rodrigo Carvalho Sousa [Federal University of Ceara (UFC), Fortaleza, CE (Brazil). Dept. of Computer Engineering. Computing Systems Engineering Lab.], e-mail:; Fortaleza, Simone Castelo Branco; Pereira, Eanes Delgado Barros; Holanda, Marcelo Alcantara [Federal University of Ceara (UFC), Fortaleza, CE (Brazil). Walter Cantidio University Hospital


    Objective: to present a locally developed system of computer vision for use with HRCT images, designated SIStema para a Deteccao e a quantificacao de Enfisema Pulmonar (SISDEP, System to Detect and Quantify Pulmonary Emphysema), and to compare this system with a free ware system tool. Methods: thirty-three HRCT images scanned at the apex, hilum and base of the lungs of 11 patients with COPD were analyzed. The SISDEP was compared with the Osiris Medical Imaging Software Program regarding lung parenchyma segmentation, precision of the measurement of the cross-sectional area of the lungs in mm{sup 2}, mean lung density (MLD), relative area (RA) of the lung occupied by voxels with attenuation values < -950 Hounsfield units (RA -950), 15th percentile point (Perc15) and visualization of hyper inflated areas using a color mask. Results: although both computational systems were efficient in segmenting the lungs, the SISDEP performed this task automatically and more rapidly. There were significant correlations between the two systems in terms of the results obtained for lung cross-sectional area, MLD, RA -950 and Perc15 (r{sup 2} = 0.99, 0.99, 0.99 and 1.00, respectively). The color mask tool of the SISDEP allowed excellent visualization of hyper inflated areas, discriminating them from normal areas. Conclusions: the SISDEP was efficient in segmenting the lungs and quantifying lung hyper inflation, presenting an excellent correlation with the Osiris system. The SISDEP constitutes a promising computational tool for diagnosing and assessing the progression of emphysema in HRCT images of COPD patients. (author)

  2. Computer-assisted evaluation of pulmonary emphysema in CT scans: comparison between a locally developed system and a freeware system. (United States)

    Felix, John Hebert da Silva; Cortez, Paulo César; Costa, Rodrigo Carvalho Sousa; Fortaleza, Simone Castelo Branco; Pereira, Eanes Delgado Barros; Holanda, Marcelo Alcantara


    To present a locally developed system of computer vision for use with HRCT images, designated SIStema para a Detecção e a quantificação de Enfisema Pulmonar (SISDEP, System to Detect and Quantify Pulmonary Emphysema), and to compare this system with a freeware system tool. Thirty-three HRCT images scanned at the apex, hilum and base of the lungs of 11 patients with COPD were analyzed. The SISDEP was compared with the Osiris Medical Imaging Software Program regarding lung parenchyma segmentation, precision of the measurement of the cross-sectional area of the lungs in mm(2), mean lung density (MLD), relative area (RA) of the lung occupied by voxels with attenuation values < -950 hounsfield units (RA -950), 15th percentile point (Perc15) and visualization of hyperinflated areas using a color mask. Although both computational systems were efficient in segmenting the lungs, the SISDEP performed this task automatically and more rapidly. There were significant correlations between the two systems in terms of the results obtained for lung cross-sectional area, MLD, RA -950 and Perc15 (r(2) = 0.99, 0.99, 0.99 and 1.00, respectively). The color mask tool of the SISDEP allowed excellent visualization of hyperinflated areas, discriminating them from normal areas. The SISDEP was efficient in segmenting the lungs and quantifying lung hyperinflation, presenting an excellent correlation with the Osiris system. The SISDEP constitutes a promising computational tool for diagnosing and assessing the progression of emphysema in HRCT images of COPD patients.

  3. Computer assisted tutoring in radiology

    CERN Document Server

    Jeffery, N


    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...

  4. Application of a Computer-Assisted Navigation System (CANS) in the Delayed Treatment of Zygomatic Fractures: A Randomized Controlled Trial. (United States)

    Gong, Xi; He, Yang; An, Jingang; Yang, Yao; Huang, Xiuling; Liu, Meng; Zhao, Yangyang; Zhang, Yi


    The delayed treatment of zygomatic complex (ZMC) fracture presents a difficult challenge to surgeons. The aim of this study was to compare the treatment effects of delayed surgery of ZMC fractures with and without a computer-assisted navigation system (CANS). In this observer-blinded single-site randomized clinical trial, patients with unilateral ZMC fracture were included and randomized 1:1 to delayed treatment with or without CANS. The primary outcome measurement was the absolute bilateral differences of the ZMC eminence and width based on computed tomographic (CT) measurements 48 to 72 hours after surgery. One hundred three patients with unilateral ZMC fracture without immediate treatment were enrolled, and 78 were randomized to each group. Postoperative CT measurements showed that the bilateral difference in ZMC eminence was significantly less for the navigation group than for the control group (1.24 vs 2.22 mm; P CANS improved ZMC symmetry in patients with unilateral ZMC fracture who had delayed treatment by allowing for more accurate implementation of the preoperative plan. Copyright © 2016 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

  5. Computer-assisted Orthopaedic Surgery. (United States)

    Hernandez, David; Garimella, Roja; Eltorai, Adam E M; Daniels, Alan H


    Nowadays, operating rooms can be inefficient and overcrowded. Patient data and images are at times not well integrated and displayed in a timely fashion. This lack of coordination may cause further reductions in efficiency, jeopardize patient safety, and increase costs. Fortunately, technology has much to offer the surgical disciplines and the ongoing and recent operating room innovations have advanced preoperative planning and surgical procedures by providing visual, navigational, and mechanical computerized assistance. The field of computer-assisted surgery (CAS) broadly refers to surgical interface between surgeons and machines. It is also part of the ongoing initiatives to move away from invasive to less invasive or even noninvasive procedures. CAS can be applied preoperatively, intraoperatively, and/or postoperatively to improve the outcome of orthopaedic surgical procedures as it has the potential for greater precision, control, and flexibility in carrying out surgical tasks, and enables much better visualization of the operating field than conventional methods have afforded. CAS is an active research discipline, which brings together orthopaedic practitioners with traditional technical disciplines such as engineering, computer science, and robotics. However, to achieve the best outcomes, teamwork, open communication, and willingness to adapt and adopt new skills and processes are critical. Because of the relatively short time period over which CAS has developed, long-term follow-up studies have not yet been possible. Consequently, this review aims to outline current CAS applications, limitations, and promising future developments that will continue to impact the operating room (OR) environment and the OR in the future, particularly within orthopedic and spine surgery. © 2017 Chinese Orthopaedic Association and John Wiley & Sons Australia, Ltd.

  6. Design and Integration of a Scent Delivery System in the Computer Assisted Rehabilitation Environment (CAREN) (United States)


    Vehicle 1664 Cumin 1650 Tar Asphalt 1680 Rosemary Focaccia Bread 1680 Car Bomb 1990 Garlic 1905 Turpentine 1992 Mesquite BBQ Scent System...system, olfactory immersion, ScentAir, CAREN, Naval Health Research Center, NHRC, Motek Medical 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF

  7. Application of a computer-assisted flexible endoscope system for transoral surgery of the hypopharynx and upper esophagus. (United States)

    Friedrich, Daniel T; Scheithauer, M O; Greve, J; Rotter, N; Doescher, J; Hoffmann, T K; Schuler, P J


    Zenker's diverticulum is a common pathology in the transition zone of the posterior hypopharynx and esophagus. Surgical treatment is routinely performed by ENT and general surgeons. Besides the traditional open transcervical diverticulectomy, the introduction of transoral rigid treatment led to a paradigm change and is now the preferred treatment option for patients who are fit for general anesthesia. The implementation of interventional flexible endoscopy has opened another new micro-invasive approach for patients with high morbidity. Here, we present the potential utilization of a flexible, single port, robot-assisted, and physician-controlled endoscope system to facilitate transoral surgical access to the hypopharynx and upper esophagus. Transoral surgery of the hypopharynx and upper esophagus was performed in human cadavers (n = 5) using the Flex System (Medrobotics, Raynham, USA). Anatomical landmarks were identified, and posterior cricothyroid myotomy was performed with compatible flexible instruments in all cases. The approach to the hypopharynx and upper esophagus using the Flex system is feasible in a cadaveric model. Myotomy with a flexible tool and needle knife (from the perspective of treatment of Zenker´s diverticulum) was successful in all cases. Visualization of the surgical site with the system's HD camera is suitable and the flexible instruments meet the special needs of a micro-invasive transoral approach. Zenker´s diverticulum can be potentially treated with a transoral minimally invasive approach using a computer-assisted flexible endoscope system. This setup could be of advantage in patients with reduced mobility of the cervical spine to prevent open transcervical surgery. In our study, the Flex system enabled advanced visualization of the surgical site and extended intervention options, compared to standard flexible endoscopic treatment. However, general anesthesia is mandatory for the presented approach. Application in live patients

  8. Embedded computer controlled premixing inline injection system for air-assisted variable-rate sprayers (United States)

    Improvements to reduce chemical waste and environmental pollution for variable-rate sprayers used in orchards and ornamental nurseries require inline injection techniques. A microprocessor controlled premixing inline injection system implementing a ceramic piston chemical metering pump and two small...

  9. Computational Finite Element Software Assisted Development of a 3D Inductively Coupled Power Transfer System

    Directory of Open Access Journals (Sweden)

    P. Raval


    Full Text Available To date inductively coupled power transfer (ICPT systems have already found many practical applications including battery charging pads. In fact, current charging platforms tend to largely support only one- or two-dimensional planar movement in load. This paper proposes a new concept of extending the aspect ratios of the operating power transfer volume of ICPT systems to support arbitrary three dimensional load movements with respect to the primary coils. This is done by use of modern finite element method analysis software to propose the primary and secondary magnetic structures of such an ICPT system. Firstly, two primary magnetic structures are proposed based on contrasting modes of operation and different field directions. This includes a single-phase and multi-phase current model. Next, a secondary magnetic structure is customized to be compatible with both primary structures. The resulting system is shown to produce a 3D power transfer volume for battery cell charging applications.

  10. Computer assisted SCFE osteotomy planning

    Energy Technology Data Exchange (ETDEWEB)

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


    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.)

  11. Computer Assisted Gamma and X-Ray Tomography: Applications to Multiphase Flow Systems.

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, Sailesh B.; Dudukovic, Milorad P. [Washington Univ., St. Louis, MO (United States). Dept. of Chemical Engineering; Toseland, Bernard A. [Air Products and Chemicals, Inc., Allentown, PA (United States)


    The application of X-ray and gamma ray transmission tomography to the study of process engineering systems is reviewed. The fundamental principles of tomography, the algorithms for image reconstruction, the measurement method and the possible sources of error are discussed in detail. A case study highlights the methodology involved in designing a scanning system for the study of a given process unit, e.g., reactor, separations column etc. Results obtained in the authors` laboratory for the gas holdup distribution in bubble columns are also presented. Recommendations are made for the Advanced Fuels Development Unit (AFDU) in LaPorte, TX.

  12. Holland's Theory and Effective Use of Computer-Assisted Career Guidance Systems. (United States)

    Lenz, Janet G.; And Others


    Clients of a university career center (n=102) used the System of Interactive Guidance and Information (SIGI) Plus and completed Holland's My Vocational Situation and Vocational Preference Inventory. Persons with higher Social and Enterprising scores rated SIGI Plus lower as a tool to acquire self and occupational knowledge. (SK)

  13. A Computer-Assisted Learning Model Based on the Digital Game Exponential Reward System (United States)

    Moon, Man-Ki; Jahng, Surng-Gahb; Kim, Tae-Yong


    The aim of this research was to construct a motivational model which would stimulate voluntary and proactive learning using digital game methods offering players more freedom and control. The theoretical framework of this research lays the foundation for a pedagogical learning model based on digital games. We analyzed the game reward system, which…

  14. Emergent Literacy Development and Computer Assisted Instruction (United States)

    Trotti, Judy; Hendricks, Randy; Bledsoe, Christie


    In this mixed-methods study, researchers examined the literacy development of prekindergarten students (N = 162) randomly placed in one of two treatment groups with each receiving 15 minutes of computer-assisted literacy instruction for four months. Literacy development of a control group of children not receiving computer-assisted instruction was…

  15. 43 Computer Assisted Programmed Instruction and Cognitive ...

    African Journals Online (AJOL)


    Computer Assisted Programmed Instruction and Cognitive Preference Style as. Determinant of Achievement of Secondary School Physics Students. Sotayo, M. A. O.. Federal College of Education, Osiele, Abeokuta, Nigeria. Abstract. The study probes into the effect of Computer Assisted Instruction and Cognitive preference.

  16. [The development and application of computer assisted photogrammetric-system of facial soft tissue running under multiple facilities for taking image]. (United States)

    Bao, B; Yu, S; Tan, J


    The photogrammetric-system was developed by using multimedia computer, colour television camera, SE100 video blaster, Newsketch 1212 HR digitizer and by using Visual Basic language. It ran under Windows 3.1 and Windows 95. The features of this system: 1. It had three kinds of functions: photogrammetric function for frontal and profile facial soft tissue, function for managing file and function for forming dynamic data base. 2. It ran under different facilities for taking image (television camera with video blaster, digitizer, scanner) speedily and specificly, and had very friendly interface, and was of multimedia. The application of this system: 1. assisting diagnosing, making plan for treatment and observing results of treatment in clinic of orthodontics, orthopedics and facial plastics, 2. assisting analysing the features of facial soft tissue about certain people, 3. assisting the multimedia teaching.

  17. Computer-assisted propofol administration.

    LENUS (Irish Health Repository)

    O'Connor, J P A


    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.

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

    Directory of Open Access Journals (Sweden)

    Feng Xin


    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.

  19. Potential of a suite of robot/computer-assisted motivating systems for personalized, home-based, stroke rehabilitation (United States)

    Johnson, Michelle J; Feng, Xin; Johnson, Laura M; Winters, Jack M


    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. PMID:17331243

  20. Computer Vision Assisted Virtual Reality Calibration (United States)

    Kim, W.


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

  1. Future Prospects for Computer-Assisted Mathematics

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, David H.; Borwein, Jonathan M.


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

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


    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. 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 systems on policy, practice and research. We conducted a search and critique of the literature on CAHTS. Using a comprehensive set of terms, we searched: MEDLINE, EMBASE, The Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, The Cochrane Central Register of Controlled Trials, The Cochrane Methodology Register, Health Technology Assessment Database and the NHS Economic Evaluation Database over a ten-year period (January 1997 to May 2007) to identify systematic reviews, technical reports and health technology assessments, and randomised controlled trials. The systematic review of the literature suggests that CAHTS can save professionals' time, improve delivery of care to those with special needs and also facilitate the collection of information, especially potentially sensitive information (e.g. sexual history, alcohol consumption). The use of CAHTS also has disadvantages that impede the process of history taking and may pose risks to patients. CAHTS are inherently limited when detecting non-verbal communication, may pose irrelevant questions and frustrate the users with technical problems. Our review suggests that barriers such as a preference for pen-and-paper methods and concerns about data loss and security still exist and affect the adoption of CAHTS. In terms of policy and practice, CAHTS make input of data from disparate sites possible, which facilitates work from disparate sites and the collection of data for nationwide screening programmes such as the vascular

  3. Using a Touch-Based, Computer-Assisted Learning System to Promote Literacy and Math Skills for Low-Income Preschoolers


    Mark H McManis; Lilla D McManis


    The use of touch-based technologies by young children to improve academic skills has seen growth outpacing empirical evidence of its effectiveness. Due to the educational challenges low-income children face, the stakes for providing instructional technology with demonstrated efficacy are high. The current work presents an empirical study of the use of a touch-based, computer-assisted learning system by low-income preschoolers. A description of the system’s design is provided with attention to...

  4. Computer-Assisted Discovery and Proof

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, David H.; Borwein, Jonathan M.


    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. Computer-assisted audiovisual health history self-interviewing. Results of the pilot study of the Hoxworth Quality Donor System. (United States)

    Zuck, T F; Cumming, P D; Wallace, E L


    The safety of blood for transfusion depends, in part, on the reliability of the health history given by volunteer blood donors. To improve reliability, a pilot study evaluated the use of an interactive computer-based audiovisual donor interviewing system at a typical midwestern blood center in the United States. An interactive video screening system was tested in a community donor center environment on 395 volunteer blood donors. Of the donors using the system, 277 completed surveys regarding their acceptance of and opinions about the system. The study showed that an interactive computer-based audiovisual donor screening system was an effective means of conducting the donor health history. The majority of donors found the system understandable and favored the system over a face-to-face interview. Further, most donors indicated that they would be more likely to return if they were to be screened by such a system. Interactive computer-based audiovisual blood donor screening is useful and well accepted by donors; it may prevent a majority of errors and accidents that are reportable to the FDA; and it may contribute to increased safety and availability of the blood supply.

  6. Influence of chamber type integrated with computer-assisted semen analysis (CASA) system on the results of boar semen evaluation. (United States)

    Gączarzewicz, D


    The objective of the study was to evaluate the effect of different types of chambers used in computer-assisted semen analysis (CASA) on boar sperm concentration and motility parameters. CASA measurements were performed on 45 ejaculates by comparing three commonly used chambers: Leja chamber (LJ), Makler chamber (MK) and microscopic slide-coverslip (SL). Concentration results obtained with CASA were verified by manual counting on a Bürker hemocytometer (BH). No significant differences were found between the concentrations determined with BH vs. LJ and SL, whereas higher (p0.05). The results obtained show that CASA assessment of boar semen should account for the effect of counting chamber on the results of sperm motility and concentration, which confirms the need for further study on standardizing the automatic analysis of boar semen.

  7. Computer programming and computer systems

    CERN Document Server

    Hassitt, Anthony


    Computer Programming and Computer Systems imparts a "reading knowledge? of computer systems.This book describes the aspects of machine-language programming, monitor systems, computer hardware, and advanced programming that every thorough programmer should be acquainted with. This text discusses the automatic electronic digital computers, symbolic language, Reverse Polish Notation, and Fortran into assembly language. The routine for reading blocked tapes, dimension statements in subroutines, general-purpose input routine, and efficient use of memory are also elaborated.This publication is inten

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

    DEFF Research Database (Denmark)

    Nielsen, Mads; Sporring, Jon

    The two-volume set LNCS 4190 and LNCS 4191 constitute the refereed proceedings of the 9th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2006, held in Copenhagen, Denmark in October 2006. The program committee carefully selected 39 revised full papers...

  9. Verification of a computational cardiovascular system model comparing the hemodynamics of a continuous flow to a synchronous valveless pulsatile flow left ventricular assist device (United States)

    Gohean, Jeffrey R.; George, Mitchell J.; Pate, Thomas D.; Kurusz, Mark; Longoria, Raul G.; Smalling, Richard W.


    The purpose of this investigation is to utilize a computational model to compare a synchronized valveless pulsatile left ventricular assist device to continuous flow left ventricular assist devices at the same level of device flow, and to verify the model with in vivo porcine data. A dynamic system model of the human cardiovascular system was developed to simulate support of a healthy or failing native heart from a continuous flow left ventricular assist device or a synchronous, pulsatile, valveless, dual piston positive displacement pump. These results were compared to measurements made during in vivo porcine experiments. Results from the simulation model and from the in vivo counterpart show that the pulsatile pump provides higher cardiac output, left ventricular unloading, cardiac pulsatility, and aortic valve flow as compared to the continuous flow model at the same level of support. The dynamic system model developed for this investigation can effectively simulate human cardiovascular support by a synchronous pulsatile or continuous flow ventricular assist device. PMID:23438771

  10. Computer-assisted access to the kidney

    CERN Document Server

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


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

  11. An integrated computer-controlled system for assisting researchers in cortical excitability studies by using transcranial magnetic stimulation. (United States)

    Giordano, D; Kavasidis, I; Spampinato, C; Bella, R; Pennisi, G; Pennisi, M


    Transcranial magnetic stimulation (TMS) is the most important technique currently available to study cortical excitability. Additionally, TMS can be used for therapeutic and rehabilitation purposes, replacing the more painful transcranial electric stimulation (TES). In this paper we present an innovative and easy-to-use tool that enables neuroscientists to design, carry out and analyze scientific studies based on TMS experiments for both diagnostic and research purposes, assisting them not only in the practicalities of administering the TMS but also in each step of the entire study's workflow. One important aspect of this tool is that it allows neuroscientists to specify research designs at will, enabling them to define any parameter of a TMS study starting from data acquisition and sample group definition to automated statistical data analysis and RDF data storage. It also supports the diagnosing process by using on-line support vector machines able to learn incrementally from the diseases instances that are continuously added into the system. The proposed system is a neuroscientist-centred tool where the protocols being followed in TMS studies are made explicit, leaving to the users flexibility in exploring and sharing the results, and providing assistance in managing the complexity of the final diagnosis. This type of tool can make the results of medical experiments more easily exploitable, thus accelerating scientific progress. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  12. Using a Touch-Based, Computer-Assisted Learning System to Promote Literacy and Math Skills for Low-Income Preschoolers

    Directory of Open Access Journals (Sweden)

    Mark H McManis


    Full Text Available The use of touch-based technologies by young children to improve academic skills has seen growth outpacing empirical evidence of its effectiveness. Due to the educational challenges low-income children face, the stakes for providing instructional technology with demonstrated efficacy are high. The current work presents an empirical study of the use of a touch-based, computer-assisted learning system by low-income preschoolers. A description of the system’s design is provided with attention to young children’s interaction with touch devices, learner engagement, and pedagogically-based delivery of academic content. Children in 18 low-income child-care preschool classrooms were assessed on literacy and math skills in the fall and again in the spring. Target children used the iStartSmart learning system throughout the academic year, while control children did not have access to the system. Compared to controls, children using the learning system made significant gains on external standardized measures of literacy and math. Children who spent more time using the system and those who reached the upper levels of skill understanding showed the strongest improvement in test scores. The findings contribute to the currently sparse literature by illuminating that for at-risk early learners, touch-based, computer-assisted instructional technology shows promise as an educational tool.

  13. Computer-Assisted Evaluation of Videokymographic Data

    Czech Academy of Sciences Publication Activity Database

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


    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 evaluation of videokymographic data.pdf

  14. Computer-Assisted Instruction on Study Skills. (United States)

    Gadzella, Bernadette M.


    A computer-assisted instruction study skills program was presented to 88 college students, while a control group did not have access to it. Scores for the experimental group on the Survey of Study Habits and Attitudes increased during the semester, while scores for the control group decreased. (Author/BW)

  15. Computer Assisted Language Learning (CALL) Software: Evaluation ...

    African Journals Online (AJOL)

    Evaluating the nature and extent of the influence of Computer Assisted Language Learning (CALL) on the quality of language learning is highly problematic. This is owing to the number and complexity of interacting variables involved in setting the items for teaching and learning languages. This paper identified and ...

  16. Computer Assisted Programmed Instruction and Cognitive ...

    African Journals Online (AJOL)

    The achievement of students of application learning mode was also significantly higher than those of recall and principle respectively. There was no significant interaction effect between Cognitive Preference Style and Computer Assisted Programmed Instruction. The implications of the result to the stakeholder were ...

  17. Giraffe, a Computer Assisted Instruction Programme. (United States)

    Boekhorst, Albert K.; Groot, Tineke

    In 1989 a two year collaborative project, CAI (Computer Assisted Instruction) & Humanities, was initiated between the Faculty of Arts and IBM Netherlands during which General Information Retrieval All Faculties For Bibliographic Education (GIRAFFE), a program for the retrieval of information on general bibliographies, was developed. The…

  18. [The history and development of computer assisted orthopaedic surgery]. (United States)

    Jenny, J-Y


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

  19. Pathologists' Computer-Assisted Diagnosis: A Mock-up of a Prototype Information System to Facilitate Automation of Pathology Sign-out. (United States)

    Farahani, Navid; Liu, Zheng; Jutt, Dylan; Fine, Jeffrey L


    - Pathologists' computer-assisted diagnosis (pCAD) is a proposed framework for alleviating challenges through the automation of their routine sign-out work. Currently, hypothetical pCAD is based on a triad of advanced image analysis, deep integration with heterogeneous information systems, and a concrete understanding of traditional pathology workflow. Prototyping is an established method for designing complex new computer systems such as pCAD. - To describe, in detail, a prototype of pCAD for the sign-out of a breast cancer specimen. - Deidentified glass slides and data from breast cancer specimens were used. Slides were digitized into whole-slide images with an Aperio ScanScope XT, and screen captures were created by using vendor-provided software. The advanced workflow prototype was constructed by using PowerPoint software. - We modeled an interactive, computer-assisted workflow: pCAD previews whole-slide images in the context of integrated, disparate data and predefined diagnostic tasks and subtasks. Relevant regions of interest (ROIs) would be automatically identified and triaged by the computer. A pathologist's sign-out work would consist of an interactive review of important ROIs, driven by required diagnostic tasks. The interactive session would generate a pathology report automatically. - Using animations and real ROIs, the pCAD prototype demonstrates the hypothetical sign-out in a stepwise fashion, illustrating various interactions and explaining how steps can be automated. The file is publicly available and should be widely compatible. This mock-up is intended to spur discussion and to help usher in the next era of digitization for pathologists by providing desperately needed and long-awaited automation.

  20. Design of a Computer-Assisted System to Automatically Detect Cell Types Using ANA IIF Images for the Diagnosis of Autoimmune Diseases. (United States)

    Cheng, Chung-Chuan; Lu, Chun-Feng; Hsieh, Tsu-Yi; Lin, Yaw-Jen; Taur, Jin-Shiuh; Chen, Yung-Fu


    Indirect immunofluorescence technique applied on HEp-2 cell substrates provides the major screening method to detect ANA patterns in the diagnosis of autoimmune diseases. Currently, the ANA patterns are mostly inspected by experienced physicians to identify abnormal cell patterns. The objective of this study is to design a computer-assisted system to automatically detect cell patterns of IIF images for the diagnosis of autoimmune diseases in the clinical setting. The system simulates the functions of modern flow cytometer and provides the diagnostic reports generated by the system to the technicians and physicians through the radar graphs, box-plots, and tables. The experimental results show that, among the IIF images collected from 17 patients, 6 were classified as coarse-speckled, 3 as diffused, 2 as discrete-speckled, 1 as fine-speckled, 2 as nucleolar, and 3 as peripheral patterns, which were consistent with the patterns determined by the physicians. In addition to recognition of cell patterns, the system also provides the function to automatically generate the report for each patient. The time needed for the whole procedure is less than 30 min, which is more efficient than the manual operation of the physician after inspecting the ANA IIF images. Besides, the system can be easily deployed on many desktop and laptop computers. In conclusion, the designed system, containing functions for automatic detection of ANA cell pattern and generation of diagnostic report, is effective and efficient to assist physicians to diagnose patients with autoimmune diseases. The limitations of the current developed system include (1) only a unique cell pattern was considered for the IIF images collected from a patient, and (2) the cells during the process of mitosis were not adopted for cell classification.

  1. Computer Assisted Language Learning” (CALL

    Directory of Open Access Journals (Sweden)

    Nazlı Gündüz


    Full Text Available This article will provide an overview of computers; an overview of the history of CALL, itspros and cons, the internet, World Wide Web, Multimedia, and research related to the uses of computers in the language classroom. Also, it also aims to provide some background for the beginnerson using the Internet in language classes today. It discusses some of the common types of Internetactivities that are being used today, what the minimum requirements are for using the Internet forlanguage learning, and some easy activities you can adapt for your classes. Some special terminology related to computers will also be used in this paper. For example, computer assisted language learning(CALL refers to the sets of instructions which need to be loaded into the computer for it to be able to work in the language classroom. It should be borne in mind that CALL does not refer to the use of acomputer by a teacher to type out a worksheet or a class list or preparing his/her own teaching alone.Hardware refers to any computer equipment used, including the computer itself, the keyboard, screen (or the monitor, the disc-drive, and the printer. Software (computer programs refers to the sets of instructions which need to be loaded into the computer for it to be able to work.

  2. Evaluation of automated fundus photograph analysis algorithms for detecting microaneurysms, haemorrhages and exudates, and of a computer-assisted diagnostic system for grading diabetic retinopathy. (United States)

    Dupas, B; Walter, T; Erginay, A; Ordonez, R; Deb-Joardar, N; Gain, P; Klein, J-C; Massin, P


    This study aimed to evaluate automated fundus photograph analysis algorithms for the detection of primary lesions and a computer-assisted diagnostic system for grading diabetic retinopathy (DR) and the risk of macular edema (ME). Two prospective analyses were conducted on fundus images from diabetic patients. Automated detection of microaneurysms and exudates was applied to two small image databases on which these lesions were manually marked. A computer-assisted diagnostic system for the detection and grading of DR and the risk of ME was then developed and evaluated, using a large database containing both normal and pathological images, and compared with manual grading. The algorithm for the automated detection of microaneurysms demonstrated a sensitivity of 88.5%, with an average number of 2.13 false positives per image. The pixel-based evaluation of the algorithm for automated detection of exudates had a sensitivity of 92.8% and a positive predictive value of 92.4%. Combined automated grading of DR and risk of ME was performed on 761 images from a large database. For DR detection, the sensitivity and specificity of the algorithm were 83.9% and 72.7%, respectively, and, for detection of the risk of ME, the sensitivity and specificity were 72.8% and 70.8%, respectively. This study shows that previously published algorithms for computer-aided diagnosis is a reliable alternative to time-consuming manual analysis of fundus photographs when screening for DR. The use of this system would allow considerable timesavings for physicians and, therefore, alleviate the time spent on a mass-screening programme. Copyright 2010 Elsevier Masson SAS. All rights reserved.

  3. Computer Assisted Drafting (CNC) Drawings. Drafting Module 6. Instructor's Guide. (United States)

    Missouri Univ., Columbia. Instructional Materials Lab.

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

  4. A Model for Intelligent Computer Assisted Language Instruction (MICALI). (United States)

    Farghaly, Ali


    States that Computer Assisted Language Instruction (CALI) software should be developed as an interactive natural language processing system. Describes artificial intelligence and proposes a model for intelligent CALI software (MICALI). Discusses MICALI's potential and current limitations due to the present state of the art. (Author/LS)

  5. Computer Assistance for Writing Interactive Programs: TICS (United States)

    Kaplow, Ray; And Others


    A description of an on-line and interactive programing system (TICS - Teacher-Interactive-Computer-System), which is aimed at facilitating the authoring of interactive, instructional computer programs by persons who are experts on the subject matter being addressed, but not necessarily programers. (Author)

  6. Computer Assisted Language Learning. Routledge Studies in Computer Assisted Language Learning (United States)

    Pennington, Martha


    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…

  7. Biology teachers’ attitudes toward computer assisted learning

    Directory of Open Access Journals (Sweden)

    Županec Vera


    Full Text Available 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 teachers from Novi Sad participated in the study. The findings suggested that the teachers generally had positive attitudes toward CAL in biology teaching. Correlation analyses revealed significant relationships between age, teaching experience, teachers’ competence to use modern teaching aids in the teaching process, professional advanced training in the field of computer applied learning, and the teachers’ attitudes toward CAL. We offer suggestions for further research in this field. [Projekat Ministarstva nauke Republike Srbije, br. 179010

  8. Computer-Assisted Exposure Treatment for Flight Phobia (United States)

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


    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…


    Directory of Open Access Journals (Sweden)

    Georgiana, MÎNDRECI


    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.

  10. Computer-Assisted Instruction: Decision Handbook. (United States)


    I0l6. (e~erti >A :::::::::::::::::::::::: 03 6. Inteligent (GeneratA .. CAI.............................. 105... emotional reactions. The role of managers, computer professionals, system users, and social Institutions In promoting positive experiences and attitudes is...Groups: Computer-Based Training; Education of the Deaf; Elementary/Secondary/Junior College; Health; Implementation; Minicomputer Users; Music

  11. Assistive and Rehabilitation Robotic System

    Directory of Open Access Journals (Sweden)

    Adrian Abrudean


    Full Text Available A short introduction concerning the content of Assistive Technology and Rehabilitation Engineering is followed by a study of robotic systems which combine two or more assistive functions. Based on biomechanical aspects, a complex robotic system is presented, starting with the study of functionality and ending with the practical aspects of the prototype development.

  12. Translation project adaptation for MT-enhanced computer assisted translation


    Cettolo, Mauro; Bertoldi, Nicola; Federico, Marcello; Schwenk, Holger; Barrault, loïc; Servan, Christophe


    International audience; The effective integration of MT technology into computer-assisted translation tools is a challenging topic both for academic research and the translation industry. Particularly, professional translators feel crucial the ability of MT systems to adapt to their feedback. In this paper, we propose an adaptation scheme to tune a statistical MT system to a translation project using small amounts of post-edited texts, like those generated by a single user in even just one da...

  13. Computer-assisted qualitative data analysis software. (United States)

    Cope, Diane G


    Advances in technology have provided new approaches for data collection methods and analysis for researchers. Data collection is no longer limited to paper-and-pencil format, and numerous methods are now available through Internet and electronic resources. With these techniques, researchers are not burdened with entering data manually and data analysis is facilitated by software programs. Quantitative research is supported by the use of computer software and provides ease in the management of large data sets and rapid analysis of numeric statistical methods. New technologies are emerging to support qualitative research with the availability of computer-assisted qualitative data analysis software (CAQDAS).CAQDAS will be presented with a discussion of advantages, limitations, controversial issues, and recommendations for this type of software use.

  14. Use of a Computer-Assisted Identification System in the Identification of the Remains of Deceased USAF Personnel. (United States)


    1987 he completed a Master of Arts degree in Computer Resource Management. Major Triplett also graduated from AFIP’s Forensic Odontology Course and...Thomas, 1973. Articles and Periodicals 4. Brannon, Lawrence S., Capt, USA. " Forensic Odontology : An Application for the Army Dentist." Military...34 Military Medicine, Vol. 146 (April 1981), pp. 262-264. 12. Kim, Ho Wohn. "The Role of Forensic Odontology in the Field of Human Identification

  15. Computer Multimedia Assisted English Vocabulary Teaching Courseware

    Directory of Open Access Journals (Sweden)

    Nan Yue


    Full Text Available English vocabulary is often regarded as the most boring link in English learning. However, English vocabulary is the basis of all aspects of English learning. Therefore, enriching the process of English vocabulary learning and stimulating the interest of English vocabulary learning are the keys to the reform of English vocabulary teaching. The computer multimedia is developing and popularizing rapidly with the rapid development of informationization and networking, which plays its role in more and more fields. The application of multimedia technology in the field of teaching is no longer strange. This paper mainly studied the design of computer multimedia assisted English vocabulary teaching courseware. First of all, this paper gave an overview of computer multimedia technology from the aspects of concept, characteristics, development and application situation, which cited and analyzed the cognitive learning theory and memory law. Under the guidance of scientific laws and in combination with the requirement analysis and pattern construction of English vocabulary teaching, this paper realized the module design, style design and database design of English vocabulary courseware. Finally, the content of English vocabulary teaching courseware was demonstrated, and its application effect was verified through the combination of subjective evaluation and objective evaluation. This article has an important guiding significance for stimulating students’ interest in English vocabulary learning and enhancing the quality of vocabulary teaching.

  16. Computer-assisted reading of mammograms

    Energy Technology Data Exchange (ETDEWEB)

    Karssemeijer, N. [Department of Radiology, University Hospital Nijmegen, P. O. Box 9101, Nijmegen, NL-6500 HB (Netherlands); Hendriks, J.H.C.L. [Department of Radiology, University Hospital Nijmegen, P. O. Box 9101, Nijmegen, NL-6500 HB (Netherlands)


    Techniques developed in computer vision and automated pattern recognition can be applied to assist radiologists in reading mammograms. With the introduction of direct digital mammography this will become a feasible approach. A radiologist in breast cancer screening can use findings of the computer as a second opinion, or as a pointer to suspicious regions. This may increase the sensitivity and specificity of screening programs, and it may avoid the need for double reading. In this paper methods which have been developed for automated detection of mammographic abnormalities are reviewed. Programs for detecting microcalcification clusters and stellate lesions have reached a level of performance which makes application in practice viable. Current programs for recognition of masses and asymmetry perform less well. Large-scale studies still have to demonstrate if radiologists in a screening situation can deal with the relatively large number of false positives which are marked by computer programs, where the number of normal cases is much higher than in observer experiments conducted thus far. (orig.). With 4 figs.

  17. On Modeling the Instructional Content in Computer Assisted Education

    Directory of Open Access Journals (Sweden)

    Emilia PECHEANU


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

  18. Challenges of technology integration and computer-assisted surgery. (United States)

    Rivkin, Gurion; Liebergall, Meir


    The rapid progress of modern computerized capabilities has not been paralleled by a similar progress in the operating room setting and in operating techniques. The major advance in orthopaedic surgery during the past fifty years has been the introduction of intraoperative fluoroscopic imaging, while surgical techniques have remained mostly unchanged. Orthopaedic procedures dealing with bones--a nondeformable tissue--are suitable for computerized guidance based on preoperatively and intraoperatively obtained images. Computer-assisted surgery progressed from the first-generation systems of the 1990 s to the present third-generation systems, enabling surgeons to implant a knee or hip prosthesis with high precision. However, most orthopaedic surgeons avoid using computer-navigation surgical techniques. Why has the implementation of computer-assisted surgery procedures met so many hurdles and obstacles? The factors that make up the answer to this question can be grouped into three categories: human, technological, and financial. Computer-assisted surgery has the potential to revolutionize orthopaedic surgery just as fluoroscopy did a few decades ago; however, its widespread use has been hampered by a lack of sufficient clinical data on the one hand and by a reluctance to use the technique and thereby collect and share data on the other. The challenge is to overcome the human, technological, and financial hurdles. Once these obstacles are addressed, we believe that computer-assisted surgery will set a new standard of care. Until that time, some will be willing to lead the revolution and pay the price of progress, and others will be reluctant to take part in this endeavor.

  19. Computer assistance for the structural chemist (United States)

    Carhart, R. E.; Varkony, T. H.; Smith, D. H.


    A description is presented of the approaches used to modify the molecular structure generator program, CONGEN. The CONGEN program for constructing structures under constraints has been discussed by Carhart et al. (1975). The modifications reported are to lead to a more efficient structure generation on the basis of a translation of structural data input to the program. From an algorithmic standpoint, CONGEN is successful if it can, in a reasonable amount of time and without exhausting storage resources, produce a list of candidate structures satisfying the chemist's constraints. However, this list is often quite large, and it remains for the chemist to discriminate among the candidates, eventually reducing the possibilities to just one structure. Ways are studied for providing computer assistance in examining and further constraining lists of structural candidates.

  20. Computer assisted optical biopsy for colorectal polyps (United States)

    Navarro-Avila, Fernando J.; Saint-Hill-Febles, Yadira; Renner, Janis; Klare, Peter; von Delius, Stefan; Navab, Nassir; Mateus, Diana


    We propose a method for computer-assisted optical biopsy for colorectal polyps, with the final goal of assisting the medical expert during the colonoscopy. In particular, we target the problem of automatic classification of polyp images in two classes: adenomatous vs non-adenoma. Our approach is based on recent advancements in convolutional neural networks (CNN) for image representation. In the paper, we describe and compare four different methodologies to address the binary classification task: a baseline with classical features and a Random Forest classifier, two methods based on features obtained from a pre-trained network, and finally, the end-to-end training of a CNN. With the pre-trained network, we show the feasibility of transferring a feature extraction mechanism trained on millions of natural images, to the task of classifying adenomatous polyps. We then demonstrate further performance improvements when training the CNN for our specific classification task. In our study, 776 polyp images were acquired and histologically analyzed after polyp resection. We report a performance increase of the CNN-based approaches with respect to both, the conventional engineered features and to a state-of-the-art method based on videos and 3D shape features.

  1. Process Design and Cost Estimating Algorithms for the Computer Assisted Procedure for Design and Evaluation of Wastewater Treatment Systems (CAPDET). (United States)


    utilized in handling alum. 2.11.4 General Description Lime Feed System. Chemical lime is produced by the calcination of high quality lime stones. Either high...calcium quicklime or dolomitic quicklime is the end product, depending on the chemical makeup of the raw material. These quicklimes are further...treated by adding water to produce their hydrated counterparts termed hydrated lime or slaked lime. Both the high calcium and the dolomitic types have been

  2. Computer assisted navigation in total knee and hip arthroplasty

    Directory of Open Access Journals (Sweden)

    Deep Kamal


    Full Text Available Introduction: Computer assisted surgery was pioneered in early 1990s. The first computer assisted surgery (CAS total knee replacement with an imageless system was carried out in 1997. In the past 25 years, CAS has progressed from experimental in vitro studies to established in vivo surgical procedures. Methods: A comprehensive body of evidence establishing the advantages of computer assisted surgery in knee and hip arthroplasty is available. Established benefits have been demonstrated including its role as an excellent research tool. Its advantages include dynamic pre-operative and per-operative assessment, increased accuracy in correction of deformities, kinematics and mechanical axis, a better alignment of components, better survival rates of prostheses and a better functional outcome. Adoption of computer navigation in the hip arthroplasty is still at an early stage compared to knee arthroplasty, though the results are well documented. Evidence suggests improved accuracy in acetabular orientation, positioning, hip offset and leg length correction. Results: Among the orthopaedic surgeons, navigated knee arthroplasty is gaining popularity though slowly. The uptake rates vary from country to country. The Australian joint registry data shows increased navigated knee arthroplasty from 2.4% in 2003 to 28.6% in 2015 and decreased revision rates with navigated knee arthroplasty in comparison with traditional instrumented knee arthroplasty in patient cohort under the age of 55 years. Conclusion: Any new technology has a learning curve and with practice the navigation assisted knee and hip arthroplasty becomes easy. We have actively followed the evidence of CAS in orthopaedics and have successfully adopted it in our routine practice over the last decades. Despite the cautious inertia of orthopaedic surgeons to embrace CAS more readily; we are certain that computer technology has a pivotal role in lower limb arthroplasty. It will evolve to become a

  3. Computer assisted navigation in total knee and hip arthroplasty. (United States)

    Deep, Kamal; Shankar, Shivakumar; Mahendra, Ashish


    Computer assisted surgery was pioneered in early 1990s. The first computer assisted surgery (CAS) total knee replacement with an imageless system was carried out in 1997. In the past 25 years, CAS has progressed from experimental in vitro studies to established in vivo surgical procedures. A comprehensive body of evidence establishing the advantages of computer assisted surgery in knee and hip arthroplasty is available. Established benefits have been demonstrated including its role as an excellent research tool. Its advantages include dynamic pre-operative and per-operative assessment, increased accuracy in correction of deformities, kinematics and mechanical axis, a better alignment of components, better survival rates of prostheses and a better functional outcome. Adoption of computer navigation in the hip arthroplasty is still at an early stage compared to knee arthroplasty, though the results are well documented. Evidence suggests improved accuracy in acetabular orientation, positioning, hip offset and leg length correction. Among the orthopaedic surgeons, navigated knee arthroplasty is gaining popularity though slowly. The uptake rates vary from country to country. The Australian joint registry data shows increased navigated knee arthroplasty from 2.4% in 2003 to 28.6% in 2015 and decreased revision rates with navigated knee arthroplasty in comparison with traditional instrumented knee arthroplasty in patient cohort under the age of 55 years. Any new technology has a learning curve and with practice the navigation assisted knee and hip arthroplasty becomes easy. We have actively followed the evidence of CAS in orthopaedics and have successfully adopted it in our routine practice over the last decades. Despite the cautious inertia of orthopaedic surgeons to embrace CAS more readily; we are certain that computer technology has a pivotal role in lower limb arthroplasty. It will evolve to become a standard practice in the future in various forms like navigation

  4. RASCAL: A Rudimentary Adaptive System for Computer-Aided Learning. (United States)

    Stewart, John Christopher

    Both the background of computer-assisted instruction (CAI) systems in general and the requirements of a computer-aided learning system which would be a reasonable assistant to a teacher are discussed. RASCAL (Rudimentary Adaptive System for Computer-Aided Learning) is a first attempt at defining a CAI system which would individualize the learning…

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

    Miller, Randolph A.


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

  6. Diagnostic performance of a computer-assisted diagnosis system for bone scintigraphy of newly developed skeletal metastasis in prostate cancer patients: search for low-sensitivity subgroups. (United States)

    Koizumi, Mitsuru; Motegi, Kazuki; Koyama, Masamichi; Terauchi, Takashi; Yuasa, Takeshi; Yonese, Junji


    The computer-assisted diagnostic system for bone scintigraphy (BS) BONENAVI is used to evaluate skeletal metastasis. We investigated its diagnostic performance in prostate cancer patients with and without skeletal metastasis and searched for the problems. An artificial neural network (ANN) value was calculated in 226 prostate cancer patients (124 with skeletal metastasis and 101 without) using BS. Receiver operating characteristic curve analysis was performed and the sensitivity and specificity determined (cutoff ANN = 0.5). Patient's situation at the time of diagnosis of skeletal metastasis, computed tomography (CT) type, extent of disease (EOD), and BS uptake grade were analyzed. False-negative and false-positive results were recorded. BONENAVI showed 82% (102/124) of sensitivity and 83% (84/101) specificity for metastasis detection. There were no significant differences among CT types, although low EOD and faint BS uptake were associated with low ANN values and low sensitivity. Patients showed lower sensitivity during the follow-up period than staging work-up. False-negative lesions were often located in the pelvis or adjacent to it. They comprised not only solitary, faint BS lesions but also overlaying to urinary excretion. BONENAVI with BS has good sensitivity and specificity for detecting prostate cancer's osseous metastasis. Low EOD and faint BS uptake are associated with low sensitivity but not the CT type. Prostate cancer patients likely to have false-negative results during the follow-up period had a solitary lesion in the pelvis with faint BS uptake or lesions overlaying to urinary excretion.

  7. The Effect of Computer Assisted and Computer Based Teaching Methods on Computer Course Success and Computer Using Attitudes of Students (United States)

    Tosun, Nilgun; Sucsuz, Nursen; Yigit, Birol


    The purpose of this research was to investigate the effects of the computer-assisted and computer-based instructional methods on students achievement at computer classes and on their attitudes towards using computers. The study, which was completed in 6 weeks, were carried out with 94 sophomores studying in formal education program of Primary…

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

    Energy Technology Data Exchange (ETDEWEB)



    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.

  9. [Computer-assisted teaching in medical education--development of methods and supplemental materials]. (United States)

    Santek, F; Bozikov, J; Kern, J; Dezelić, G


    A review of the elementary types of materials for the computer assisted learning (CAI--Computer Assisted Instruction) is given in this paper. It shows our initial experiences in creating the computer educational materials of the patient management simulation type, destinated for the primary care physicians. A computer simulation program "First Aid in Traffic Accident" is described as an example. A typical structure of these materials is shown. The materials had been developed using the own authoring system, a computer program which enables the teachers and other experts to create the computer educational materials independently, with the minimal help of the professional computer experts.

  10. Computer-assisted virtual autopsy using surgical navigation techniques. (United States)

    Ebert, Lars Christian; Ruder, Thomas D; Martinez, Rosa Maria; Flach, Patricia M; Schweitzer, Wolf; Thali, Michael J; Ampanozi, Garyfalia


    OBJECTIVE; Virtual autopsy methods, such as postmortem CT and MRI, are increasingly being used in forensic medicine. Forensic investigators with little to no training in diagnostic radiology and medical laypeople such as state's attorneys often find it difficult to understand the anatomic orientation of axial postmortem CT images. We present a computer-assisted system that permits postmortem CT datasets to be quickly and intuitively resliced in real time at the body to narrow the gap between radiologic imaging and autopsy. Our system is a potentially valuable tool for planning autopsies, showing findings to medical laypeople, and teaching CT anatomy, thus further closing the gap between radiology and forensic pathology.

  11. Effects of computer-assisted oral anticoagulant therapy

    DEFF Research Database (Denmark)

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


    the therapeutic target range compared to traditional oral anticoagulant therapy by physicians. METHODS: 54 patients were randomized equally into 3 groups. Patients in two groups used CoaguChek® systems to measure international normalized ratio (INR) values and had dosages of anticoagulation treatment calculated...... in a computer system by an algorithm specific to each group. The third group received traditional anticoagulation treatment by physicians. The obtained INR values were compared regarding the time to reach, and the time spent within, the therapeutic target range, corresponding to INR values from 2 to 3. RESULTS......: Patients randomized to computer-assisted anticoagulation and the CoaguChek® system reached the therapeutic target range after 8 days compared to 14 days by prescriptions from physicians (p = 0.04). Time spent in the therapeutic target range did not differ between groups. The median INR value measured...

  12. Applications and Problems of Computer Assisted Education in Turkey (United States)

    Usun, Salih


    This paper focuses on the Computer Assisted Education (CAE) in Turkey; reviews of the related literature; examines the projects, applications and problems on the Computer Assisted Education (CAE) in Turkey compares with the World; exposes the positive and negative aspects of the projects; a number of the suggestion presents on the effective use of…

  13. Computer-Assisted Linguistic Analysis of the Peshitta

    NARCIS (Netherlands)

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


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

  14. Incorporating computer-assisted assessment to Bachelor of Science ...

    African Journals Online (AJOL)

    The use of computers in education has already been established for decades. Computers have been used from lesson preparations, presentations, and student assessments. Many authors have studied the design, implementation, and impact of computer-assisted assessment (CAA) (also called computer-based testing, ...


    Directory of Open Access Journals (Sweden)

    I. N. Vorozhtsov


    Full Text Available Background: In the last 10 years, the use of computer-assisted navigation systems (CANS in endo-nasal endoscopic surgery of the paranasal sinuses and skull base in adults has been well studied. In pediatric practice, isolated cases of the use of this method have been described, with most of patients suffering from various types of sinusitis. Aim: To improve efficacy of the transnasal surgery for sinonasal, nasopharyngeal and skull base neoplasms in pediatric patients. Materials and methods: 77 patients aged from 22 days to 18 years with various nasal, nasopharyngeal, paranasal and skull base neoplasms were divided into two groups depending on the surgical technique. The main group included 40 patients in whom CANS guided surgery was used and the control group comprised 37 patients operated without CANS. Each group was divided into two subgroups based upon the complexity of the intervention (in subgroup 1, it was a biopsy and in subgroup 2, tumor excision. Results: There were no significant differences between 1st subgroups of both groups in the intervention duration, intra-operative blood loss, number of post-operative days in the hospital. Compared to the patients from the subgroup 2 of the control group, in those from the subgroup 2 of the main group the duration of intervention decreased by 60 minutes (p = 0.038, Mann-Whitney U-test, intra-operative blood loss decreased by half (p = 0.044, Mann-Whitney U-test, duration of hospital stay, by 2 days (p = 0.02, Student's t-test. The rates of radical excision was higher in the main group (p = 0.02, Fischer's exact test. Conclusion: The use of CANS in endonasal surgery allows for reduction of the intervention time and anesthesia duration, minimizes blood loss, is associated with earlier post-operative rehabilitation of children.

  16. TADS: Technical Assistance Development System. (United States)

    Epting, Rosemary, Ed.

    Described is the Technical Assistance Development System (TADS), a component of the Frank Porter Graham Child Development Center of the University of North Carolina at Chapel Hill which offers support services to preschool demonstration centers for handicapped children in the First Chance Network. Discussed are the four types of services offered:…

  17. Evaluation of FITC-Induced Atopic Dermatitis-Like Disease in NC/Nga Mice and BALB/c Mice Using Computer-Assisted Stereological Toolbox, a Computer-Aided Morphometric System

    DEFF Research Database (Denmark)

    Hvid, Malene; Jensen, Helene; Deleuran, Bent


    , as this is mandatory for research animals in many countries. Methods: We evaluated the use of the hapten FITC as an inducer of AD-like disease in NC/Nga and BALB/c mice maintained under SPF conditions. Mice were either untreated or treated with tacrolimus or betamethasone. Using the software Computer Assisted...

  18. A new system of computer-assisted navigation leading to reduction in operating time in uncemented total hip replacement in a matched population. (United States)

    Chaudhry, Fouad A; Ismail, Sanaa Z; Davis, Edward T


    Computer-assisted navigation techniques are used to optimise component placement and alignment in total hip replacement. It has developed in the last 10 years but despite its advantages only 0.3% of all total hip replacements in England and Wales are done using computer navigation. One of the reasons for this is that computer-assisted technology increases operative time. A new method of pelvic registration has been developed without the need to register the anterior pelvic plane (BrainLab hip 6.0) which has shown to improve the accuracy of THR. The purpose of this study was to find out if the new method reduces the operating time. This was a retrospective analysis of comparing operating time in computer navigated primary uncemented total hip replacement using two methods of registration. Group 1 included 128 cases that were performed using BrainLab versions 2.1-5.1. This version relied on the acquisition of the anterior pelvic plane for registration. Group 2 included 128 cases that were performed using the newest navigation software, BrainLab hip 6.0 (registration possible with the patient in the lateral decubitus position). The operating time was 65.79 (40-98) minutes using the old method of registration and was 50.87 (33-74) minutes using the new method of registration. This difference was statistically significant. The body mass index (BMI) was comparable in both groups. The study supports the use of new method of registration in improving the operating time in computer navigated primary uncemented total hip replacements.

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

    Directory of Open Access Journals (Sweden)

    Omer Faruk Sozcu


    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

  20. Attacks on computer systems

    Directory of Open Access Journals (Sweden)

    Dejan V. Vuletić


    Full Text Available Computer systems are a critical component of the human society in the 21st century. Economic sector, defense, security, energy, telecommunications, industrial production, finance and other vital infrastructure depend on computer systems that operate at local, national or global scales. A particular problem is that, due to the rapid development of ICT and the unstoppable growth of its application in all spheres of the human society, their vulnerability and exposure to very serious potential dangers increase. This paper analyzes some typical attacks on computer systems.

  1. Computer-Assisted Traffic Engineering Using Assignment, Optimal Signal Setting, and Modal Split (United States)


    Methods of traffic assignment, traffic signal setting, and modal split analysis are combined in a set of computer-assisted traffic engineering programs. The system optimization and user optimization traffic assignments are described. Travel time func...

  2. Computer-assisted Navigation in Bone Tumor Surgery: Seamless Workflow Model and Evolution of Technique

    National Research Council Canada - National Science Library

    So, Timothy Y. C; Lam, Ying-Lee; Mak, Ka-Lok


    .... Registration techniques vary, although most existing systems use some form of surface matching.We developed and evaluated a workflow model of computer-assisted bone tumor surgery and evaluated (1...

  3. Audible Computer-Assisted Instruction: Toward the Compleat CAI. (United States)

    Hertzler, Emanuel C.


    Presents the technical details of the hardware and software used with two kinds of computers, the Radio Shack TRS-80 and the Apple II, in developing personalized computer-assisted instruction with the addition of the instructor's voice interfaced with the computer. Programing controls for this interface are listed. (RAO)

  4. Computer Assisted Assessment and The Role it Plays in ...

    African Journals Online (AJOL)

    Although the use of computers in data-driven decision making in education was initially focused on education's core business i.e. computer aided learning (CAL), educational leaders are now using this approach to transform other aspects of their operations e.g. computer-assisted assessment (CAA). The full potential of ...

  5. Computer-assisted Elementary Chinese Learning for American Students (United States)

    Hong-yan, Zhang


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

  6. Resilient computer system design

    CERN Document Server

    Castano, Victor


    This book presents a paradigm for designing new generation resilient and evolving computer systems, including their key concepts, elements of supportive theory, methods of analysis and synthesis of ICT with new properties of evolving functioning, as well as implementation schemes and their prototyping. The book explains why new ICT applications require a complete redesign of computer systems to address challenges of extreme reliability, high performance, and power efficiency. The authors present a comprehensive treatment for designing the next generation of computers, especially addressing safety-critical, autonomous, real time, military, banking, and wearable health care systems.   §  Describes design solutions for new computer system - evolving reconfigurable architecture (ERA) that is free from drawbacks inherent in current ICT and related engineering models §  Pursues simplicity, reliability, scalability principles of design implemented through redundancy and re-configurability; targeted for energy-,...

  7. Providing Assistive Technology Applications as a Service Through Cloud Computing. (United States)

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


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

  8. Ethics and Computer-Assisted Assessment: Three Case Studies. (United States)

    Jacob, Susan; Brantley, John C.


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

  9. Computer-assisted software transcription of qualitative interviews. (United States)

    Alcock, John; Iphofen, Ron


    John Alcock and Ron Iphofen examine a method to assist with interview transcription using free, open source computer software and digital recordings, and consider some underlying practical, ethical and philosophical issues.

  10. Center for Advanced Energy Studies: Computer Assisted Virtual Environment (CAVE) (United States)

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

  11. Virtual tutor systems for robot-assisted instruction (United States)

    Zhao, Zhijing; Zhao, Deyu; Zhang, Zizhen; Wei, Yongji; Qi, Bingchen; Okawa, Yoshikuni


    Virtual Reality technology belongs to advanced computer technology, it has been applied in instruction field and gains obvious effect. At the same time, robot assisted instruction comes true with the continuous development of Robot technology and artificial intelligence technology. This paper introduces a virtual tutor system for robot assisted instruction.

  12. Medical image computing and computer-assisted intervention - MICCAI 2005. Proceedings; Pt. 1

    Energy Technology Data Exchange (ETDEWEB)

    Duncan, J.S. [Yale Univ., New Haven, CT (United States). Dept. of Biomedical Engineering and Diagnostic Radiology; Gerig, G. (eds.) [North Carolina Univ., Chapel Hill (United States). Dept. of Computer Science


    The two-volume set LNCS 3749 and LNCS 3750 constitutes the refereed proceedings of the 8th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2005, held in Palm Springs, CA, USA, in October 2005. Based on rigorous peer reviews the program committee selected 237 carefully revised full papers from 632 submissions for presentation in two volumes. The first volume includes all the contributions related to image analysis and validation, vascular image segmentation, image registration, diffusion tensor image analysis, image segmentation and analysis, clinical applications - validation, imaging systems - visualization, computer assisted diagnosis, cellular and molecular image analysis, physically-based modeling, robotics and intervention, medical image computing for clinical applications, and biological imaging - simulation and modeling. The second volume collects the papers related to robotics, image-guided surgery and interventions, image registration, medical image computing, structural and functional brain analysis, model-based image analysis, image-guided intervention: simulation, modeling and display, and image segmentation and analysis. (orig.)

  13. Computer-assisted liver surgery: clinical applications and technological trends. (United States)

    Peterhans, Matthias; Oliveira, Thiago; Banz, Vanessa; Candinas, Daniel; Weber, Stefan


    Oncological liver surgery and interventions aim for removal of tumor tissue while preserving a sufficient amount of functional tissue to ensure organ regeneration. This requires detailed understanding of the patient-specific internal organ anatomy (blood vessel system, bile ducts, tumor location). The introduction of computer support in the surgical process enhances anatomical orientation through patient-specific 3D visualization and enables precise reproduction of planned surgical strategies though stereotactic navigation technology. This article provides clinical background information on indications and techniques for the treatment of liver tumors, reviews the technological contributions addressing the problem of organ motion during navigated surgery on a deforming organ, and finally presents an overview of the clinical experience in computer-assisted liver surgery and interventions. The review concludes that several clinically applicable solutions for computer aided liver surgery are available and small-scale clinical trials have been performed. Further developments will be required more accurate and faster handling of organ deformation and large clinical studies will be required for demonstrating the benefits of computer aided liver surgery.

  14. Computer network defense system (United States)

    Urias, Vincent; Stout, William M. S.; Loverro, Caleb


    A method and apparatus for protecting virtual machines. A computer system creates a copy of a group of the virtual machines in an operating network in a deception network to form a group of cloned virtual machines in the deception network when the group of the virtual machines is accessed by an adversary. The computer system creates an emulation of components from the operating network in the deception network. The components are accessible by the group of the cloned virtual machines as if the group of the cloned virtual machines was in the operating network. The computer system moves network connections for the group of the virtual machines in the operating network used by the adversary from the group of the virtual machines in the operating network to the group of the cloned virtual machines, enabling protecting the group of the virtual machines from actions performed by the adversary.

  15. Computer system operation

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Young Jae; Lee, Hae Cho; Lee, Ho Yeun; Kim, Young Taek; Lee, Sung Kyu; Park, Jeong Suk; Nam, Ji Wha; Kim, Soon Kon; Yang, Sung Un; Sohn, Jae Min; Moon, Soon Sung; Park, Bong Sik; Lee, Byung Heon; Park, Sun Hee; Kim, Jin Hee; Hwang, Hyeoi Sun; Lee, Hee Ja; Hwang, In A. [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)


    The report described the operation and the trouble shooting of main computer and KAERINet. The results of the project are as follows; 1. The operation and trouble shooting of the main computer system. (Cyber 170-875, Cyber 960-31, VAX 6320, VAX 11/780). 2. The operation and trouble shooting of the KAERINet. (PC to host connection, host to host connection, file transfer, electronic-mail, X.25, CATV etc.). 3. The development of applications -Electronic Document Approval and Delivery System, Installation the ORACLE Utility Program. 22 tabs., 12 figs. (Author) .new.

  16. Some Measurement and Instruction Related Considerations Regarding Computer Assisted Testing. (United States)

    Oosterhof, Albert C.; Salisbury, David F.

    The Assessment Resource Center (ARC) at Florida State University provides computer assisted testing (CAT) for approximately 4,000 students each term. Computer capabilities permit a small proctoring staff to administer tests simultaneously to large numbers of students. Programs provide immediate feedback for students and generate a variety of…

  17. Teaching Reading through Computer-Assisted Language Learning (United States)

    Bhatti, Tariq Muhammad


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

  18. General Purpose Cost Distribution Model for Computer Assisted Instruction. (United States)

    Voeller, Rick

    To compare the unit cost of computer-assisted instruction (CAI) programs, there must be a standard model for calculating the cost of computer services. Such cost can be classified into direct costs--expenditures made directly by the group in charge of CAI programs, and indirect costs--expenditures made by other groups in support of CAI services.…

  19. Computer-Assisted Language Learning: Diversity in Research and Practice (United States)

    Stockwell, Glenn, Ed.


    Computer-assisted language learning (CALL) is an approach to teaching and learning languages that uses computers and other technologies to present, reinforce, and assess material to be learned, or to create environments where teachers and learners can interact with one another and the outside world. This book provides a much-needed overview of the…

  20. Toward computer-assisted diagnosis and telemedicine in ophthalmology

    Czech Academy of Sciences Publication Activity Database

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


    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 computer-assisted diagnosis and telemedicine in ophthalmology .pdf

  1. Electromagnetic Induction: A Computer-Assisted Experiment (United States)

    Fredrickson, J. E.; Moreland, L.


    By using minimal equipment it is possible to demonstrate Faraday's Law. An electronic desk calculator enables sophomore students to solve a difficult mathematical expression for the induced EMF. Polaroid pictures of the plot of induced EMF, together with the computer facility, enables students to make comparisons. (PS)

  2. An Evaluation of the Effectiveness of a Computer-Assisted Reading Intervention (United States)

    Messer, David; Nash, Gilly


    Background: A cost-effective method to address reading delays is to use computer-assisted learning, but these techniques are not always effective. Methods: We evaluated a commercially available computer system that uses visual mnemonics, in a randomised controlled trial with 78 English-speaking children (mean age 7 years) who their schools…

  3. Computer-assisted sperm analysis (CASA): capabilities and potential developments. (United States)

    Amann, Rupert P; Waberski, Dagmar


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

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

    Directory of Open Access Journals (Sweden)

    Guoyan eZheng


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

  5. Computer-Assisted Orthopedic Surgery: Current State and Future Perspective. (United States)

    Zheng, Guoyan; Nolte, Lutz P


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

  6. Motivation in computer-assisted instruction. (United States)

    Hu, Amanda; Shewokis, Patricia A; Ting, Kimberly; Fung, Kevin


    Computer-aided instruction (CAI) is defined as instruction in which computers play a central role as the means of information delivery and direct interaction with learners. Computer-aided instruction has become mainstream in medical school curricula. For example, a three-dimensional (3D) computer module of the larynx has been created to teach laryngeal anatomy. Although the novelty and educational potential of CAI has garnered much attention, these new technologies have been plagued with low utilization rates. Several experts attribute this problem to lack of motivation in students. Motivation is defined as the desire and action toward goal-oriented behavior. Psychologist Dr. John Keller developed the ARCS theory of motivational learning, which proposed four components: attention (A), relevance (R), concentration (C), and satisfaction (S). Keller believed that motivation is not only an innate characteristic of the pupil; it can also be influenced by external factors, such as the instructional design of the curriculum. Thus, understanding motivation is an important step to designing CAI appropriately. Keller also developed a 36-item validated instrument called the Instructional Materials Motivation Survey (IMMS) to measure motivation. The objective of this study was to study motivation in CAI. Medical students learning anatomy with the 3D computer module will have higher laryngeal anatomy test scores and higher IMMS motivation scores. Higher anatomy test scores will be positively associated with higher IMMS scores. Prospective, randomized, controlled trial. After obtaining institutional review board approval, 100 medical students (mean age 25.5 ± 2.5, 49% male) were randomized to either the 3D computer module (n = 49) or written text (n = 51). Information content was identical in both arms. Students were given 30 minutes to study laryngeal anatomy and then completed the laryngeal anatomy test and IMMS. Students were categorized as either junior (year 1

  7. Computer Multimedia Assisted English Vocabulary Teaching Courseware


    Nan Yue


    English vocabulary is often regarded as the most boring link in English learning. However, English vocabulary is the basis of all aspects of English learning. Therefore, enriching the process of English vocabulary learning and stimulating the interest of English vocabulary learning are the keys to the reform of English vocabulary teaching. The computer multimedia is developing and popularizing rapidly with the rapid development of informationization and networking, which plays its role in mor...

  8. Computational systems chemical biology. (United States)

    Oprea, Tudor I; May, Elebeoba E; Leitão, Andrei; Tropsha, Alexander


    There is a critical need for improving the level of chemistry awareness in systems biology. The data and information related to modulation of genes and proteins by small molecules continue to accumulate at the same time as simulation tools in systems biology and whole body physiologically based pharmacokinetics (PBPK) continue to evolve. We called this emerging area at the interface between chemical biology and systems biology systems chemical biology (SCB) (Nat Chem Biol 3: 447-450, 2007).The overarching goal of computational SCB is to develop tools for integrated chemical-biological data acquisition, filtering and processing, by taking into account relevant information related to interactions between proteins and small molecules, possible metabolic transformations of small molecules, as well as associated information related to genes, networks, small molecules, and, where applicable, mutants and variants of those proteins. There is yet an unmet need to develop an integrated in silico pharmacology/systems biology continuum that embeds drug-target-clinical outcome (DTCO) triplets, a capability that is vital to the future of chemical biology, pharmacology, and systems biology. Through the development of the SCB approach, scientists will be able to start addressing, in an integrated simulation environment, questions that make the best use of our ever-growing chemical and biological data repositories at the system-wide level. This chapter reviews some of the major research concepts and describes key components that constitute the emerging area of computational systems chemical biology.

  9. Evaluation of a Robotic Assistance-System For Percutaneous Computed Tomography-Guided (CT-Guided) Facet Joint Injection: A Phantom Study. (United States)

    Beyer, Lukas Philipp; Michalik, Katharina; Niessen, Christoph; Platz Batista da Silva, Natascha; Wiesinger, Isabell; Stroszczynski, Christian; Wiggermann, Philipp


    BACKGROUND The aim of this study was to compare robotic assisted and freehand facet joint puncture on a phantom model in regards to time requirements and puncture accuracy. MATERIAL AND METHODS Forty facet joints were punctured, 20 using a robotic guidance system and 20 using a freehand procedure. Side and height of the facet joints were randomized and identical for both groups. Procedural accuracy, defined as axial and sagittal deviation, as well as the number of corrections were assessed. Procedure times for each step were documented and time requirements for pre-positioning, reconstruction, planning, and total intervention were calculated. RESULTS Total procedure time for robotic guidance was 259±111 seconds versus 119±77 seconds for freehand procedure (p=1.0). Procedural accuracy for robotic guidance was significantly higher with 0 corrections versus 1.3 corrections for freehand procedure (p=0.02). Needle deviation in the robotics arm was 0.35±1.1 mm in the axial and 2.15±1.2 mm in the sagittal reconstruction. CONCLUSIONS Robotic assisted puncture of the facet joint allowed accurate positioning of the needle with a lower number of needle readjustments. Higher procedural accuracy was marginally offset by a slightly longer intervention time.

  10. Colour analysis of the equine endometrium: comparison of spectrophotometry and computer-assisted analysis of photographs within the L*a*b* colour space system. (United States)

    Neuhauser, S; Handler, J


    The aims of this study were to compare two different methods of quantifying the colour of the luminal surface of the equine endometrium and to relate the results to histopathological evidence of inflammation and fibrosis. The mucosal surfaces of 17 equine uteri obtained from an abattoir were assessed using a spectrophotometer and by computer-assisted analysis of photographs. Values were converted into L(*)a(*)b(*) colour space. Although there was significant correlation between the two methods of quantification, variations in 'brightness', 'red' and 'yellow' values were noted. Within a given uterus, measurements using the spectrophotometer did not differ significantly. Using photographic analysis, brightness differed between horns, although no differences in chromaticity were found. Histopathological classification of changes within endometria corresponded to measured differences in colour. Extensive fibrosis was associated with increased brightness and decreased chromaticity using both methods. Inflammation correlated with reduced chromaticity, when measured by spectrophotometry, and with reduced brightness and yellow values, when assessed photographically. For this technique to gain wider acceptance as a diagnostic tool, e.g. for the endoscopic evaluation of uterine mucosae in vivo, standardised illumination techniques will be required so that colours can be compared and interpreted accurately. Copyright © 2013 Elsevier Ltd. All rights reserved.

  11. Teacher Training Programs for Computer Education and Computer Assisted Education in Turkey (United States)

    Usun, Salih


    The aim of this descriptive study is to review the applications and problems on the teacher training programs for computer education and computer assisted education (CAE) in Turkey. The study, firstly, introduces some applications and major problems on using instructional media and computers in developing countries and instructional technology…

  12. Computer-assisted engineering data base (United States)

    Dube, R. P.; Johnson, H. R.


    General capabilities of data base management technology are described. Information requirements posed by the space station life cycle are discussed, and it is asserted that data base management technology supporting engineering/manufacturing in a heterogeneous hardware/data base management system environment should be applied to meeting these requirements. Today's commercial systems do not satisfy all of these requirements. The features of an R&D data base management system being developed to investigate data base management in the engineering/manufacturing environment are discussed. Features of this system represent only a partial solution to space station requirements. Areas where this system should be extended to meet full space station information management requirements are discussed.

  13. [Computer-assisted analysis of intrapartum cardiotocodynagraphs]. (United States)

    Roemer, V M


    To develop a numerical index by quantifying characteristic cardiotocography parameters in order to determine the intrauterine state of the fetus sub partu with sufficient accuracy to improve the diagnostic potential of cardiotocography. This score is then computerized for offline and online analysis. The last 120 minutes of 406 directly recorded intrapartal cardiotocograms (CTG) were evaluated with a magnifying glass on the basis of conventional criteria. The mean basal frequency, the amplitude and the oscillation frequency of each individual baseline minute, the decelerations with depth, duration and type classification as well as the accelerations were determined. The Apgar score and the measurements of blood gases in the umbilical arterial and venous blood served as outcome parameters. The actual pH in the umbilical artery (UA) was the key variable. The newly developed CTG score was converted into a complex programming language after meticulous statistical testing and prepared for offline and online use. A score which is based on the CTG characteristics basal frequency level, baseline fluctuation and total decelerations area was developed on the basis of about 40 000 baseline minutes and more than 8 000 analysed decelerations from 406 fetuses which were all vaginal deliveries with a rate of acidosis (pH,UA analysis of electronically registered CTGs with the assistance of a mathematician, so that the obstetrician's "eye work" can be dispensed with entirely. This program written in "C" also enables online evaluation of fetal heart rate patterns over time and a representation of the output parameters with acoustic and optical warning display options appropriate for the delivery room. Quantitative registration of fetal heart rate phenomena during delivery can be accomplished successfully by means of a score. The score correlates highly significantly with the actual pH value (UA) and the Apgar score (1 min). It is suitable both for offline and online analysis of

  14. Chemically Assisted Photocatalytic Oxidation System (United States)

    Andino, Jean; Wu, Chang-Yu; Mazyck, David; Teixeira, Arthur A.


    The chemically assisted photocatalytic oxidation system (CAPOS) has been proposed for destroying microorganisms and organic chemicals that may be suspended in the air or present on surfaces of an air-handling system that ventilates an indoor environment. The CAPOS would comprise an upstream and a downstream stage that would implement a tandem combination of two partly redundant treatments. In the upstream stage, the air stream and, optionally, surfaces of the air-handling system would be treated with ozone, which would be generated from oxygen in the air by means of an electrical discharge or ultraviolet light. In the second stage, the air laden with ozone and oxidation products from the first stage would be made to flow in contact with a silica-titania photocatalyst exposed to ultraviolet light in the presence of water vapor. Hydroxyl radicals generated by the photocatalytic action would react with both carbon containing chemicals and microorganisms to eventually produce water and carbon dioxide, and ozone from the first stage would be photocatalytically degraded to O2. The net products of the two-stage treatment would be H2O, CO2, and O2.

  15. Computer-assisted cognitive-behavior therapy for depression. (United States)

    Eells, Tracy D; Barrett, Marna S; Wright, Jesse H; Thase, Michael


    This article reviews the use of computer technology in treating depression as a substitute or adjunct for standard therapy. It discusses advantages and disadvantages of introducing computer technology as a treatment option, problems and barriers to expanded use, the varieties of computer-assisted psychotherapy for major depression, and relevant research. Three specific Internet-based programs are described, assessed and compared: Good Days Ahead, Beating the Blues, and MoodGYM. The authors conclude that these and similar programs are promising. Preliminary outcome studies suggest that these programs produce outcome similar to standard therapy, although methodological shortcomings limit confidence in these findings. Suggestions are offered for practitioners considering the addition of computer assistance to their treatment of depression. (c) 2014 APA, all rights reserved.

  16. Accuracy of computer-assisted orthognathic surgery. (United States)

    De Riu, Giacomo; Virdis, Paola Ilaria; Meloni, Silvio Mario; Lumbau, Aurea; Vaira, Luigi Angelo


    The purpose of this study was to retrospectively evaluate the difference between the planned and the actual movements of the jaws, using three-dimensional (3D) software for PC-assisted orthognathic surgery, to establish the accuracy of the procedure. A retrospective study was performed with 49 patients who had undergone PC-guided bimaxillary surgery. The accuracy of the protocol was determined by comparing planned movements of the jaws with the actual surgical movements, analysing frontal and lateral cephalometries. The overall results were deemed accurate, and differences among 12 of the 15 parameters were considered nonsignificant. Significant differences were reported for SNA (p = 0.008), SNB (p = 0.006), and anterior facial height (p = 0.033). The latter was significantly different in patients who had undergone genioplasty when compared with patients who had not. Virtual surgical planning presented a good degree of accuracy for most of the parameters assessed, with an average error of 1.98 mm for linear measures and 1.19° for angular measures. In general, a tendency towards under-projection in jaws was detected, probably due to imperfect condylar seating. A slight overcorrection of SNA and SNB during virtual planning (approximately 2°) could be beneficial. Further progress is required in the development of 3D simulation of the soft tissue, which currently does not allow an accurate management of the facial height and the chin position. Virtual planning cannot replace the need for constant intraoperative monitoring of the jaws' movements and real-time comparisons between planned and actual outcomes. It is therefore appropriate to leave some margin for correction of inaccuracies in the virtual planning. In this sense, it may be appropriate to use only the intermediate splint, and then use the planned occlusion and clinical measurements to guide repositioning of the second jaw and chin, respectively. Copyright © 2017 European Association for Cranio

  17. Computer security for the computer systems manager


    Helling, William D.


    Approved for public release; distribution is unlimited This thesis is a primer on the subject of computer security. It is written for the use of computer systems managers and addresses basic concepts of computer security and risk analysis. An example of the techniques employed by a typical military data processing center is included in the form of the written results of an actual on-site survey. Computer security is defined in the context of its scope and an analysis is made of those ...

  18. Computer memory management system (United States)

    Kirk, III, Whitson John


    A computer memory management system utilizing a memory structure system of "intelligent" pointers in which information related to the use status of the memory structure is designed into the pointer. Through this pointer system, The present invention provides essentially automatic memory management (often referred to as garbage collection) by allowing relationships between objects to have definite memory management behavior by use of coding protocol which describes when relationships should be maintained and when the relationships should be broken. In one aspect, the present invention system allows automatic breaking of strong links to facilitate object garbage collection, coupled with relationship adjectives which define deletion of associated objects. In another aspect, The present invention includes simple-to-use infinite undo/redo functionality in that it has the capability, through a simple function call, to undo all of the changes made to a data model since the previous `valid state` was noted.

  19. Computer-Assisted Inverse Design of Inorganic Electrides

    Directory of Open Access Journals (Sweden)

    Yunwei Zhang


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

  20. Computer-Assisted Inverse Design of Inorganic Electrides (United States)

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


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

  1. Anxiety, Drive Theory, and Computer-Assisted Learning. (United States)

    Spielberger, Charles D.; And Others

    Hypotheses about the effects of anxiety on performance in computer-assisted instruction (CAI) were formulated and then tested. High school students and college students were used in the experiments. Learning materials used were in the subjects of science, mathematics, psychology, physics, and educational research. Two settings were compared: a…

  2. Computer-Assisted Instruction: What the Research Shows. (United States)

    Bracey, Gerald W.


    Briefly reviews current research on the effectiveness of computer-assisted instruction (CAI) and microcomputers. The Hawthorne Effect and research results for elementary, secondary, and college level students are discussed, courseware requirements are described, and research studies showing positive and negative effects of CAI are listed. (LRW)

  3. Computer-Assisted Dieting: Effects of a Randomized Nutrition Intervention (United States)

    Schroder, Kerstin E. E.


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

  4. The Impact of Computer-Assisted Instruction on Secondary School ...

    African Journals Online (AJOL)

    This research, carried out in Manicaland Province in Zimbabwe, aimed to investigate the impact of computer-assisted instruction on students' performance in Geography. The equivalent group research design which included a pre-test post-test control group design was used. Respondents to interviews and pre-test and ...

  5. The use of Computer Assisted Language Learning (CALL) Devices ...

    African Journals Online (AJOL)

    Computer-Assisted Language Learning (CALL) is a relatively new and rapidly evolving academic field that explores the role of information and communication technologies in language learning and teaching. It has rapidly developed over the last forty years. This development can be categorized into three distinct phases: ...

  6. Computer game assisted instruction and students' achievement in ...

    African Journals Online (AJOL)

    This paper examines the effects of computer game assisted instructional method, student's achievement in social studies in Nigerian schools. An overview of the position of social studies subject in schools today is undertaken showing social studies teaching needs more attention, this is done by applying or integrating ...

  7. Computer-Assisted Learning in British Sign Language (United States)

    Mertzani, Maria


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

  8. User Interface Improvements in Computer-Assisted Instruction, the Challenge. (United States)

    Chalmers, P. A.


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

  9. Ethical and Professional Issues in Computer-Assisted Therapy. (United States)

    Ford, B. Douglas


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

  10. Implementation of Computer Assisted Assessment: Lessons from the Literature (United States)

    Sim, Gavin; Holifield, Phil; Brown, Martin


    This paper draws attention to literature surrounding the subject of computer-assisted assessment (CAA). A brief overview of traditional methods of assessment is presented, highlighting areas of concern in existing techniques. CAA is then defined, and instances of its introduction in various educational spheres are identified, with the main focus…

  11. Conversation Analysis in Computer-Assisted Language Learning (United States)

    González-Lloret, Marta


    The use of Conversation Analysis (CA) in the study of technology-mediated interactions is a recent methodological addition to qualitative research in the field of Computer-assisted Language Learning (CALL). The expansion of CA in Second Language Acquisition research, coupled with the need for qualitative techniques to explore how people interact…

  12. Integrating Computer-Assisted Translation Tools into Language Learning (United States)

    Fernández-Parra, María


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

  13. Renal Diet Therapy--A Computer-Assisted Instruction Model. (United States)

    Schroeder, Lois; Thiele, Victoria F.


    A computer-assisted instruction (CAI) unit was designed to teach renal diet therapy. Utilizing this unit, differences in performance and attitudes between traditionally taught and CAI taught students (N=34), and differences in achievement between students in two nutrition fields were assessed. (DS)

  14. Computer-Assisted Foreign Language Teaching and Learning: Technological Advances (United States)

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


    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…

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

    NARCIS (Netherlands)

    Neri, A.


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

  16. Shade matching assisted by digital photography and computer software. (United States)

    Schropp, Lars


    To evaluate the efficacy of digital photographs and graphic computer software for color matching compared to conventional visual matching. The shade of a tab from a shade guide (Vita 3D-Master Guide) placed in a phantom head was matched to a second guide of the same type by nine observers. This was done for twelve selected shade tabs (tests). The shade-matching procedure was performed visually in a simulated clinic environment and with digital photographs, and the time spent for both procedures was recorded. An alternative arrangement of the shade tabs was used in the digital photographs. In addition, a graphic software program was used for color analysis. Hue, chroma, and lightness values of the test tab and all tabs of the second guide were derived from the digital photographs. According to the CIE L*C*h* color system, the color differences between the test tab and tabs of the second guide were calculated. The shade guide tab that deviated least from the test tab was determined to be the match. Shade matching performance by means of graphic software was compared with the two visual methods and tested by Chi-square tests (alpha= 0.05). Eight of twelve test tabs (67%) were matched correctly by the computer software method. This was significantly better (p < 0.02) than the performance of the visual shade matching methods conducted in the simulated clinic (32% correct match) and with photographs (28% correct match). No correlation between time consumption for the visual shade matching methods and frequency of correct match was observed. Shade matching assisted by digital photographs and computer software was significantly more reliable than by conventional visual methods.

  17. A review of computer assisted learning in medical undergraduates. (United States)

    John, Lisha J


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

  18. Natural language processing tools for computer assisted language learning

    Directory of Open Access Journals (Sweden)

    Vandeventer Faltin, Anne


    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.

  19. Computer-Assisted Assessment -- Research into E-Assessment. Proceedings of the 17th International Conference on Computer Assisted Assessment

    NARCIS (Netherlands)

    Kalz, Marco; Ras, Eric


    This book constitutes the refereed proceedings of the International Conference on Computer Assisted Assessment, CAA 2014, held in Zeist, The Netherlands, in June/July 2014. The 16 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers address issues

  20. Errors and Intelligence in Computer-Assisted Language Learning: Parsers and Pedagogues. Routledge Studies in Computer Assisted Language Learning (United States)

    Heift, Trude; Schulze, Mathias


    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…

  1. Computer-assisted 3D design software for teaching neuro-ophthalmology of the oculomotor system and training new retinal surgery techniques (United States)

    Glittenberg, Carl; Binder, Susanne


    Purpose: To create a more effective method of demonstrating complex subject matter in ophthalmology with the use of high end, 3-D, computer aided animation and interactive multimedia technologies. Specifically, to explore the possibilities of demonstrating the complex nature of the neuroophthalmological basics of the human oculomotor system in a clear and non confusing way, and to demonstrate new forms of retinal surgery in a manner that makes the procedures easier to understand for other retinal surgeons. Methods and Materials: Using Reflektions 4.3, Monzoom Pro 4.5, Cinema 4D XL 5.03, Cinema 4D XL 8 Studio Bundle, Mediator 4.0, Mediator Pro 5.03, Fujitsu-Siemens Pentium III and IV, Gericom Webgine laptop, M.G.I. Video Wave 1.0 and 5, Micrografix Picture Publisher 6.0 and 8, Amorphium 1.0, and Blobs for Windows, we created 3-D animations showing the origin, insertion, course, main direction of pull, and auxiliary direction of pull of the six extra-ocular eye muscles. We created 3-D animations that (a) show the intra-cranial path of the relevant oculomotor cranial nerves and which muscles are supplied by them, (b) show which muscles are active in each of the ten lines of sight, (c) demonstrate the various malfunctions of oculomotor systems, as well as (d) show the surgical techniques and the challenges in radial optic neurotomies and subretinal surgeries. Most of the 3-D animations were integrated in interactive multimedia teaching programs. Their effectiveness was compared to conventional teaching methods in a comparative study performed at the University of Vienna. We also performed a survey to examine the response of students being taught with the interactive programs. We are currently in the process of placing most of the animations in an interactive web site in order to make them freely available to everyone who is interested. Results: Although learning how to use complex 3-D computer animation and multimedia authoring software can be very time consuming and

  2. Interactive Computer-Assisted Instruction in Acid-Base Physiology for Mobile Computer Platforms (United States)

    Longmuir, Kenneth J.


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

  3. The Computational Sensorimotor Systems Laboratory (United States)

    Federal Laboratory Consortium — The Computational Sensorimotor Systems Lab focuses on the exploration, analysis, modeling and implementation of biological sensorimotor systems for both scientific...

  4. Probabilistic validation of advanced driver assistance systems

    NARCIS (Netherlands)

    Gietelink, O.J.; Schutter, B. de; Verhaegen, M.


    We present a methodological approach for validation of advanced driver assistance systems, based on randomized algorithms. The new methodology is more efficient than conventional validation by simulations and field tests, especially with increasing system complexity. The methodology consists of

  5. Soft Tissue Biomechanical Modeling for Computer Assisted Surgery

    CERN Document Server


      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 ...

  6. Secure computing on reconfigurable systems

    NARCIS (Netherlands)

    Fernandes Chaves, R.J.


    This thesis proposes a Secure Computing Module (SCM) for reconfigurable computing systems. SC provides a protected and reliable computational environment, where data security and protection against malicious attacks to the system is assured. SC is strongly based on encryption algorithms and on the

  7. Implementation of computer assisted assessment: lessons from the literature


    Sim, Gavin; Holifield, Phil; Brown, Martin


    This paper draws attention to literature surrounding the subject of computer-assisted assessment (CAA). A brief overview of traditional methods of assessment is presented, highlighting areas of concern in existing techniques. CAA is then defined, and instances of its introduction in various educational spheres are identified, with the main focus of the paper concerning the implementation of CAA. Through referenced articles, evidence is offered to inform practitioners, and direct further resea...

  8. Computer-Assisted Orthopedic Surgery: Current State and Future Perspective


    Zheng, Guoyan; Nolte, Lutz P.


    Introduced about two decades ago, computer-assisted orthopedic surgery (CAOS) has emerged as a new and independent area, due to the importance of treatment of musculoskeletal diseases in orthopedics and traumatology, increasing availability of different imaging modalities, and advances in analytics and navigation tools. The aim of this paper is to present the basic elements of CAOS devices and to review state-of-the-art examples of different imaging modalities used to create the virtual repre...

  9. Learning Priniciples Essential for effective computer assisted instruction (cai)


    Havlicek, Larry L.; Ghandour, Mahmoud M.


    Guidelines and recommendations for effective computer assisted instruction are presented based on a review of the current theories and research relating to cognitive conceptions of learning and instructional design which are documented by meta-analytic techniques. The main focus is on how meta-cognitive processes are conceptualized and integrated for the most effective development of any interactive technology for learning. These concepts are then integrated into sequencing and synthesizin...

  10. Embedded systems for supporting computer accessibility. (United States)

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


    Nowadays, customized AT software solutions allow their users to interact with various kinds of computer systems. Such tools are generally available on personal devices (e.g., smartphones, laptops and so on) commonly used by a person with a disability. In this paper, we investigate a way of using the aforementioned AT equipments in order to access many different devices without assistive preferences. The solution takes advantage of open source hardware and its core component consists of an affordable Linux embedded system: it grabs data coming from the assistive software, which runs on the user's personal device, then, after processing, it generates native keyboard and mouse HID commands for the target computing device controlled by the end user. This process supports any operating system available on the target machine and it requires no specialized software installation; therefore the user with a disability can rely on a single assistive tool to control a wide range of computing platforms, including conventional computers and many kinds of mobile devices, which receive input commands through the USB HID protocol.

  11. An evaluation of the effectiveness of a computer-assisted reading intervention


    Messer, D. J.; Nash, Gilly


    Background. A cost-effective method to address reading delays is to use computer-assisted learning, but these are not always effective. \\ud Methods. We evaluated a commercially available computer system which uses visual mnemonics, in a randomised controlled trial with 78 English speaking children (mean age 7;7 years) who their schools identified as needing reading support. School based individual tutorials usually took place 2-3 times/week. Only the experimental group received the interventi...

  12. Ambulatory Computer-Assisted Therapy for Obesity: A New Frontier for Behavior Therapy. (United States)

    Burnett, Kent F.; And Others


    Implemented a behavioral treatment program for obesity using an interactive microcomputer system small enough to be carried by subjects. Subjects receiving the computer-assisted treatment lost approximately 2.5 times as much weight as controls and their rate of weight loss equaled that for more elaborate behavioral treatments. (MCF)


    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...


    Directory of Open Access Journals (Sweden)

    PINTILIE Anca-Aurelia


    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.

  15. Computer systems a programmer's perspective

    CERN Document Server

    Bryant, Randal E


    Computer systems: A Programmer’s Perspective explains the underlying elements common among all computer systems and how they affect general application performance. Written from the programmer’s perspective, this book strives to teach readers how understanding basic elements of computer systems and executing real practice can lead them to create better programs. Spanning across computer science themes such as hardware architecture, the operating system, and systems software, the Third Edition serves as a comprehensive introduction to programming. This book strives to create programmers who understand all elements of computer systems and will be able to engage in any application of the field--from fixing faulty software, to writing more capable programs, to avoiding common flaws. It lays the groundwork for readers to delve into more intensive topics such as computer architecture, embedded systems, and cybersecurity. This book focuses on systems that execute an x86-64 machine code, and recommends th...

  16. Threats to Computer Systems (United States)


    subjects and objects of attacks contribute to the uniqueness of computer-related crime. For example, as the cashless , checkless society approaches...advancing computer tech- nology and security methods, and proliferation of computers in bringing about the paperless society . The universal use of...organizations do to society . Jerry Schneider, one of the known perpetrators, said that he was motivated to perform his acts to make money, for the

  17. Computer-assisted initial diagnosis of rare diseases

    Directory of Open Access Journals (Sweden)

    Rui Alves


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

  18. Computer-assisted instruction of arrhythmia for MS-windows. (United States)

    Takeuchi, A; Nara, Y; Ikeda, N; Miyahara, H; Mitobe, H


    1. INTRODUCTION. Training in the diagnosis of arrhythmias is an important part of the curriculum for medical students, postgraduates, and paramedical staff. Although several CAI for arrhythmia have been developed [1-3], we could not get CAI software for arrhythmia for the MS-Windows environment. In this report, we present a newly-developed computer-assisted reference system for arrhythmia that functions in the Windows environment. 2. DESCRIPTION OF THE SYSTEM. The system consists of a program and two data files. An MS-Windows program (ECG9405.EXE, 180kB) was compiled using Borland's C++ v.3.1. A binary file (ECPAT.BAS 33kB) includes data of normal and abnormal wave segments of ECG: P wave, PQ interval segment, and QRs complex with/without T wave. A mother file (ECG9405.sys, 57kB) includes 85 data sets to generate ECG waveforms of arrhythmia. Each data set contains a sequence of wave form numbers, the text for questions and answers, and the commands strings. There are five major commands: 1) to create a new window as "wave window"; 2) to make electrocardiogram data; 3) to plot the data on the window; 4) to create a "dialog box" for questions and explanations; and 5) to check the answers. he program gets a data set from the data according to the user's choice. The program then interprets the data set and executes the commands. The wave segment data are plotted in a "wave window" at every 10 milliseconds; this is controlled by the MS-Windows' timer. The timer interval can be changed by selecting the speed button. The ECG waveforms are displayed on a window just like an ordinary ECG monitor with beat sound. Many windows can be created by the user and many ECG waves simultaneously plotted on CRT. 3. USAGE OF THE SYSTEM. The "main window" has a menu that has three items corresponding to the training course: BASIC, TRY, and TEST. Thirty-five types of arrythmias are listed in the "list box" of the windows in BASIC course e.g., sinus arrhythmia, atrial flutter, atrial

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

    Energy Technology Data Exchange (ETDEWEB)

    Shuk, K.


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

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

    CERN Document Server

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


    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.

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

    Directory of Open Access Journals (Sweden)

    Yavuz Erdoğan


    Full Text Available The purpose of this study is to compare the effects of computer assisted projectbased instruction on learners’ achievement in a science and technology course, in a computer course and in portfolio development. With this aim in mind, a quasiexperimental design was used and a sample of 70 seventh grade secondary school students from Org. Eşref Bitlis Primary School in Istanbul was selected. The students were randomly assigned to one of the two groups: the control group and experimental group. Instruction to control group was provided by the traditional project-based learning approach, to the experimental group was provided computer assisted project-based learning approach. Both groups were given instruction on the topic of Our Living Conditions in the syllabus of 7th grade Science and Technology course. During the five-week instruction, experimental group was required to prepare the projects with using computer assisted project-based method, while control group used traditional project-based method. At the end of the study, the findings revealed that science and technology and portfolio assessment scores of the experimental group were significantly higher than that of the control group. This result indicates that the learning gains are higher when instruction is provided by computer assisted project-based instruction than by the traditional method

  2. Resource Management in Computing Systems


    Amani, Payam


    Resource management is an essential building block of any modern computer and communication network. In this thesis, the results of our research in the following two tracks are summarized in four papers. The first track includes three papers and covers modeling, prediction and control for multi-tier computing systems. In the first paper, a NARX-based multi-step-ahead response time predictor for single server queuing systems is presented which can be applied to CPU-constrained computing system...

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

    Directory of Open Access Journals (Sweden)

    Yi Sun


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

  4. Two-cloud-servers-assisted secure outsourcing multiparty computation. (United States)

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


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

  5. The use of wireless laptop computers for computer-assisted learning in pharmacokinetics. (United States)

    Munar, Myrna Y; Singh, Harleen; Belle, Donna; Brackett, Carolyn C; Earle, Sandra B


    To implement computer-assisted learning workshops into pharmacokinetics courses in a doctor of pharmacy (PharmD) program. Workshops were designed for students to utilize computer software programs on laptop computers to build pharmacokinetic models to predict drug concentrations resulting from various dosage regimens. In addition, students were able to visualize through graphing programs how altering different parameters changed drug concentration-time curves. Surveys were conducted to measure students' attitudes toward computer technology before and after implementation. Finally, traditional examinations were used to evaluate student learning. Doctor of pharmacy students responded favorably to the use of wireless laptop computers in problem-based pharmacokinetic workshops. Eighty-eight percent (n = 61/69) and 82% (n = 55/67) of PharmD students completed surveys before and after computer implementation, respectively. Prior to implementation, 95% of students agreed that computers would enhance learning in pharmacokinetics. After implementation, 98% of students strongly agreed (p laptop computers in a pharmacokinetic course enabled students to construct their own pharmacokinetic models that could respond to changing parameters. Students had greater comprehension and were better able to interpret results and provide appropriate recommendations. Computer-assisted pharmacokinetic techniques can be powerful tools when making decisions about drug therapy.


    Directory of Open Access Journals (Sweden)

    LUCA Cornelia


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

  7. Students Computer Literacy: Covariate For Assessing The Efficacy Of Computer Assisted Learning Tools


    Ronald R. Tidd; Richard Fenzl


    The purpose of this paper is to focus attention on the need to more rigorously measure computer-specific student characteristics when assessing the efficacy of computer assisted learning tools and benchmarking a curriculum's impact. It accomplishes this by first modeling learning outcomes assessment, identifying appropriate instruments, and discussing the absence of such measures in accounting education research. Then, the measurement process employed by the authors is discussed. The unsurpri...

  8. Effects of complex feedback on computer-assisted modular instruction

    NARCIS (Netherlands)

    Gordijn, Jan; Nijhof, W.J.


    The aim of this study is to determine the effects of two versions of Computer-Based Feedback within a prevocational system of modularized education in The Netherlands. The implementation and integration of Computer-Based Feedback (CBF) in Installation Technology modules in all schools (n=60) in The

  9. Capability-based computer systems

    CERN Document Server

    Levy, Henry M


    Capability-Based Computer Systems focuses on computer programs and their capabilities. The text first elaborates capability- and object-based system concepts, including capability-based systems, object-based approach, and summary. The book then describes early descriptor architectures and explains the Burroughs B5000, Rice University Computer, and Basic Language Machine. The text also focuses on early capability architectures. Dennis and Van Horn's Supervisor; CAL-TSS System; MIT PDP-1 Timesharing System; and Chicago Magic Number Machine are discussed. The book then describes Plessey System 25

  10. Risks in Networked Computer Systems


    Klingsheim, André N.


    Networked computer systems yield great value to businesses and governments, but also create risks. The eight papers in this thesis highlight vulnerabilities in computer systems that lead to security and privacy risks. A broad range of systems is discussed in this thesis: Norwegian online banking systems, the Norwegian Automated Teller Machine (ATM) system during the 90's, mobile phones, web applications, and wireless networks. One paper also comments on legal risks to bank cust...

  11. The Potential of Computer-Assisted Direct Observation Apps

    Directory of Open Access Journals (Sweden)

    Daniel Wessel


    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.

  12. General purpose computer-assisted clustering and conceptualization (United States)

    Grimmer, Justin; King, Gary


    We develop a computer-assisted method for the discovery of insightful conceptualizations, in the form of clusterings (i.e., partitions) of input objects. Each of the numerous fully automated methods of cluster analysis proposed in statistics, computer science, and biology optimize a different objective function. Almost all are well defined, but how to determine before the fact which one, if any, will partition a given set of objects in an “insightful” or “useful” way for a given user is unknown and difficult, if not logically impossible. We develop a metric space of partitions from all existing cluster analysis methods applied to a given dataset (along with millions of other solutions we add based on combinations of existing clusterings) and enable a user to explore and interact with it and quickly reveal or prompt useful or insightful conceptualizations. In addition, although it is uncommon to do so in unsupervised learning problems, we offer and implement evaluation designs that make our computer-assisted approach vulnerable to being proven suboptimal in specific data types. We demonstrate that our approach facilitates more efficient and insightful discovery of useful information than expert human coders or many existing fully automated methods. PMID:21292983

  13. Receiving Assistance and Local Food System Participation

    Directory of Open Access Journals (Sweden)

    Rebecca L. Som Castellano


    Full Text Available A body of literature has noted that local food systems (LFSs may not involve active participation by individuals with lower incomes. This is, in part, a function of racial and class hegemony, as well as physical and financial accessibility of LFSs. LFS institutions, such as farmers’ markets, have been working to facilitate receipt of food assistance programs, such as the Supplemental Nutrition Assistance Program (SNAP. Charitable assistance programs, such as food banks, have also been actively working to engage in LFSs, for example, by making local foods available. However, little research has explored the role that receiving public or charitable assistance can play in influencing LFS participation. In this article, I utilize quantitative and qualitative data collected from across the state of Ohio to examine the relationship between receiving assistance and LFS participation for women, who remain predominately responsible for food provisioning in the U.S., including among those who participate in LFSs. Quantitative results suggest that receiving assistance can increase participation in LFSs. Qualitative data provides more nuanced information about the importance of food assistance for women who want to participate in LFSs, and suggest that it is essential that food cooperatives and farmers’ markets are equipped to receive food assistance programs, such as SNAP, in order for women with lower incomes to participate in LFSs.


    Directory of Open Access Journals (Sweden)

    Alejandro Alcaraz Sintes


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

  15. Computer assisted learning: a new paradigm in dental education. (United States)

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


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

  16. Steam Turbine Assisted Cogeneration systems

    Directory of Open Access Journals (Sweden)

    Šariský Marián


    Full Text Available Searching for the best way of improving using systems of production electrical energy and heat is part of an intensive development in the field of energetic. Using steam turbines in the cogeneration system is very important step at increasing the effection not only of the whole system, but of the gas turbine as well. The advantages and the characteristic features of the system are shown in the article.

  17. Toast: The power system operators assistant

    Energy Technology Data Exchange (ETDEWEB)

    Talukdar, S.N.; Cardozo, E.; Leao, L.


    The environments in which power system operators work are becoming more complex. New constraints are appearing, old constraints are tightening, and the number of decision variables is increasing. To cope with these trends, operators need intelligent assistants to help manage information and lighten their decision-making burdens. Such assistants can be divided into two types: Phase-1 assistants for off-line uses and Phase-2 assistants for on-line uses and Phase-2 assistants for on-line, real-time uses. Toast is an evolving Phase-1 assistant. Of the nine possible functions of an assistant, Toast has immediate potential in two-diagnosis and criticism. Its diagnostic knowledge, though hardly complete, is extensive enough to be useful to human operators. In contrast, its abilities to critique proposed courses of action are much less developed and, as yet, consist only of facilities to simulate some of the these courses of action. Toast has been written in Cops, a programming environment that allows for distributed processing and has a readily extensible library of both symbolic and numerical programs. These features should make the task of expanding Toast relatively painless. Of the many directions in which expansions could occur, we plan on adding diagnostic capabilities in the area of power system security. This area was identified in a study as the most worthy of development.

  18. Computer Security Systems Enable Access. (United States)

    Riggen, Gary


    A good security system enables access and protects information from damage or tampering, but the most important aspects of a security system aren't technical. A security procedures manual addresses the human element of computer security. (MLW)

  19. Computer-Assisted Technique for Surgical Tooth Extraction

    Directory of Open Access Journals (Sweden)

    Hosamuddin Hamza


    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.

  20. Promoting Intrinsic and Extrinsic Motivation among Chemistry Students Using Computer-Assisted Instruction (United States)

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


    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…

  1. Pathologists' Computer-Assisted Diagnosis: A Mock-up of a Prototype Information System to Facilitate Automation of Pathology Sign-out

    National Research Council Canada - National Science Library

    Jutt, Dylan; Farahani, Navid; Fine, Jeffrey L; Liu, Zheng


    .... Currently, hypothetical pCAD is based on a triad of advanced image analysis, deep integration with heterogeneous information systems, and a concrete understanding of traditional pathology workflow...

  2. Energy efficient distributed computing systems

    CERN Document Server

    Lee, Young-Choon


    The energy consumption issue in distributed computing systems raises various monetary, environmental and system performance concerns. Electricity consumption in the US doubled from 2000 to 2005.  From a financial and environmental standpoint, reducing the consumption of electricity is important, yet these reforms must not lead to performance degradation of the computing systems.  These contradicting constraints create a suite of complex problems that need to be resolved in order to lead to 'greener' distributed computing systems.  This book brings together a group of outsta

  3. Computer-Assisted Concept Mapping: Visual Aids for Knowledge Construction. (United States)

    Mammen, Jennifer R


    Concept mapping is a visual representation of ideas that facilitates critical thinking and is applicable to many areas of nursing education. Computer-assisted concept maps are more flexible and less constrained than traditional paper methods, allowing for analysis and synthesis of complex topics and larger amounts of data. Ability to iteratively revise and collaboratively create computerized maps can contribute to enhanced interpersonal learning. However, there is limited awareness of free software that can support these types of applications. This educational brief examines affordances and limitations of computer-assisted concept maps and reviews free software for development of complex, collaborative malleable maps. Free software, such as VUE, XMind, MindMaple, and others, can substantially contribute to the utility of concept mapping for nursing education. Computerized concept-mapping is an important tool for nursing and is likely to hold greater benefit for students and faculty than traditional pen-and-paper methods alone. [J Nurs Educ. 2016;55(7):403-406.]. Copyright 2016, SLACK Incorporated.

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

    Directory of Open Access Journals (Sweden)

    Gregory Aist


    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 ( To learn a word from reading with the Reading Tutor, students must encounter the word and learn the meaning of the word in context. We modified the Reading Tutor first to help students encounter new words and then to help them learn the meanings of new words. We then compared the Reading Tutor to classroom instruction and to human-assisted oral reading as part of a yearlong study with 144 second and third graders. The result: Second graders did about the same on word comprehension in all three conditions. However, third graders who read with the 1999 Reading Tutor, modified as described in this paper, performed statistically significantly better than other third graders in a classroom control on word comprehension gains – and even comparably with other third graders who read one-on-one with human tutors.

  5. [Design and application of computer-assisted software for teaching and research of population genetics]. (United States)

    Gao, Jing; Pan, Shen-Yuan; Cao, Jing


    The computer-assisted software for population genetics' teaching and research is designed with Microsoft Visual Basic 6.0. It takes all factors affecting population genetic structure into account. By way of setting various conditional parameters, calculating theoretically, simulating with computer and choosing the states of show, the system displays the results in charts and tables accurately. It also presents distribution pattern, statistical characteristics and the change of population gene frequencies and genotype frequencies in the inter-generation visually. The software is a mature system for teaching and researches on the aspects of its functions, operations and interface.

  6. Outcomes of the implementation of the computer-assisted HBView system for the prevention of hepatitis B virus reactivation in chemotherapy patients: a retrospective analysis. (United States)

    Sanagawa, Akimasa; Kuroda, Junko; Shiota, Arufumi; Kito, Noriko; Takemoto, Masashi; Kawade, Yoshihiro; Esaki, Tetsuo; Kimura, Kazunori


    Screening for hepatitis B virus (HBV) infection is recommended worldwide for patients receiving systemic chemotherapy in accordance with clinical guidelines, but compliance varies by country and facility. Alert systems may be useful for promoting screening, but it is unclear how effective such systems are. In this study, we investigated HBV screening procedures and their incorporation into treatment regimens following the implementation of an alert system. An alert system was introduced at our hospital in April 2012. The rates of HBV screening in the periods before and after the introduction of the alert system (September 2010 to March 2012 and April 2012 to October 2013, respectively) were investigated. We collected data on hepatitis B surface antigen (HBsAg), hepatitis B surface antibody (HBsAb), hepatitis B core antibody (HBcAb), and HBV-DNA testing in patients. As a result of this analysis, we developed a system in which pharmacists would intervene to check and confirm whether HBV screening had occurred in patients scheduled to begin treatment with chemotherapy. We named our project the "HBView" project, and the rate of HBV screening and the number of times pharmacists intervened was studied during specific time periods before and after the HBView project commenced (July 2013 to December 2013 and January 2014 to June 2014, respectively). After introducing the alert system, the percentage of patients tested for HBsAb/HBcAb and HBV-DNA increased significantly, from 71.6 % to 84.9 % and from 44.5 % to 69.7 %, respectively. However, the rate of compliance with HBV testing guidelines was not 100 % after interventions. The numbers of patients who were not screened but should have been before and after the introduction of HBView were 6 and 17, respectively. Two patients at risk of HBV reactivation were identified after intervention by pharmacists; their intervention thus prevented HBV reactivation. Compliance with clinical HBV screening guidelines was not

  7. Models of the Learner in Computer-Assisted Instruction (United States)


    LEARNER IN COMUTER -ASSISTED INSTRUCTION J. D. Fletcher Reviewed by J. D. Ford, Jr. Approved by J. J. Regan Technical Director Navy Personnel Research and...heuristic part. The epistemological part represents, or models, the world so that problem solutions follow from what is represented. The heuristic parL...relevant hints to studer.ts and by encouraging students to use diverse solution paths. The interpreter was uscd in a CAI system that permitted a student

  8. [Health technology assessment report: Computer-assisted Pap test for cervical cancer screening]. (United States)

    Della Palma, Paolo; Moresco, Luca; Giorgi Rossi, Paolo


    HEALTH PROBLEM: Cervical cancer is a disease which is highly preventable by means of Pap test screening for the precancerous lesions, which can be easily treated. Furthermore, in the near future, control of the disease will be enhanced by the vaccination which prevents the infection of those human papillomavirus types that cause the vast majority of cervical cancers. The effectiveness of screening in drastically reducing cervical cancer incidence has been clearly demonstrated. The epidemiology of cervical cancer in industrialised countries is now determined mostly by the Pap test coverage of the female population and by the ability of health systems to assure appropriate follow up after an abnormal Pap test. Today there are two fully automated systems for computer-assisted Pap test: the BD FocalPoint and the Hologic Imager. Recently, the Hologic Integrated Imager, a semi-automated system, was launched. The two fully automated systems are composed of a central scanner, where the machine examines the cytologic slide, and of one or more review stations, where the cytologists analyze the slides previously centrally scanned. The softwares used by the two systems identify the fields of interest so that the cytologists can look only at those points, automatically pointed out by the review station. Furthermore, the FocalPoint system classifies the slides according to their level of risk of containing signs of relevant lesions. Those in the upper classes--about one fifth of the slides--are labelled as « further review », while those in the lower level of risk, i.e. slides that have such a low level of risk that they can be considered as negative with no human review, are labelled as « no further review ». The aim of computer-assisted Pap test is to reduce the time of slide examination and to increase productivity. Furthermore, the number of errors due to lack of attention may decrease. Both the systems can be applied to liquidbased cytology, while only the BD Focal

  9. [Application values of computer-assisted preoperative planning of hilar cholangiocarcinoma]. (United States)

    Li, Huixing; Shi, Xianjie; Liang, Yurong; He, Lei; Chen, Mingyi; Wang, Hongguang; Lü, Shaocheng; Wang, Xuedong; Meng, Xiangfei


    To explore the application value of computer-assisted preoperative planning of hilar cholangiocarcinoma. Retrospective analyses were conducted for the clinical data of 47 patients with hilar cholangiocarcinoma undergoing radical resection plus hemihepatectomy from January to December 2013. According to whether computer-assisted preoperative planning was used, they were divided two groups of computer-assisted surgical planning (CASP) and without computer-assisted surgical planning (WCASP). Then we analyzed the data including preoperative examinations, preoperative planning, intraoperative findings and postoperative complications. There were 31 cases of hilar vascular invasion by tumor. Among 29 cases of CASP, left hepatic artery originated from left gastric artery (n = 6), right posterior bile duct drained into left hepatic bile duct (n = 1) and right posterior bile duct run into common hepatic bile duct (n = 2). The mean operative duration of CASP was (6.5 ± 1.3) h and the mean volume of intraoperative bleeding (672.0 ± 214.3) ml; while the mean operative duration of WCASP was (7.9 ± 2.9) h and the mean volume of intraoperative bleeding (870.0 ± 330.1) ml. By statistical analysis, the inter-group differences of mean operative duration had statistical difference (P = 0.028) and the inter-group differences of mean volume of intraoperative bleeding had statistical difference (P = 0.016). The ratio of first negative test in group CASP was higher than that of group WCASP and the inter-group differences had statistical significance (P = 0.043). But the inter-group rate of postoperative complications had no significant difference (P = 0.419). The computer-assisted surgical planning system provides accurate information so that an optimal surgical protocol may be designed by surgeons. And it has great application values in preoperative surgical planning for hilar cholangiocarcinoma and enjoys wide prospects in precise liver surgery.

  10. Choosing the right computer system. (United States)

    Freydberg, B K; Seltzer, S M; Walker, B


    We are living in a world where virtually any information you desire can be acquired in a matter of moments with the click of a mouse. The computer is a ubiquitous fixture in elementary schools, universities, small companies, large companies, and homes. Many dental offices have incorporated computers as an integral part of their management systems. However, the role of the computer is expanding in the dental office as new hardware and software advancements emerge. The growing popularity of digital radiography and photography is making the possibility of a completely digital patient record more desirable. The trend for expanding the role of dental office computer systems is reflected in the increased number of companies that offer computer packages. The purchase of one of these new systems represents a significant commitment on the part of the dentist and staff. Not only do the systems have a substantial price tag, but they require a great deal of time and effort to become fully integrated into the daily office routine. To help the reader gain some clarity on the blur of new hardware and software available, I have enlisted the help of three recognized authorities on the subject of office organization and computer systems. This article is not intended to provide a ranking of features and shortcomings of specific products that are available, but rather to present a process by which the reader might be able to make better choices when selecting or upgrading a computer system.

  11. The validity of a computer-assisted simulation system for orthognathic surgery (CASSOS) for planning the surgical correction of class III skeletal deformities: single-jaw versus bimaxillary surgery. (United States)

    Jones, R M; Khambay, B S; McHugh, S; Ayoub, A F


    The aim of this study was to assess the accuracy of the two-dimensional profile prediction produced by the computer-assisted simulation system for orthognathic surgery (CASSOS), for the correction of class III facial deformities. Correction was by maxillary advancement (n=17) or bimaxillary surgery (n=16). The mean age was 24 years (range 18-42). The surgical and dental movements obtained from the postoperative cephalogram were used to produce a CASSOS profile prediction, which was compared with the soft-tissue profile. The prediction was superimposed onto the postoperative radiograph, and a coordinate system was used to measure linear differences. For the maxillary advancement group there were statistical differences for three horizontal landmarks: superior labial sulcus (p=0.017), labrale superious (p=0.038) and labiomental fold (p=0.014). In the bimaxillary group only the landmark vertical labrale superious (p=0.002) showed a statistical difference. Generally, CASSOS produced useful profile predictions for maxillary advancement surgery or bimaxillary surgery for Class III patients, although there was considerable individual variation. The main areas of inaccuracy were the lips. The major difference between the two types of surgery was that most of the errors in the maxillary surgery group were in the horizontal direction, whilst for the bimaxillary surgery the errors were mainly in the vertical direction.

  12. Students "Hacking" School Computer Systems (United States)

    Stover, Del


    This article deals with students hacking school computer systems. School districts are getting tough with students "hacking" into school computers to change grades, poke through files, or just pit their high-tech skills against district security. Dozens of students have been prosecuted recently under state laws on identity theft and unauthorized…

  13. Maxillary arch rehabilitation using implant-supported computer-assisted design-computer-assisted manufacturing-milled titanium framework

    Directory of Open Access Journals (Sweden)

    Tulika S Khanna


    Full Text Available Esthetic and functional rehabilitation of completely edentulous maxillary arch with fixed implant supported prosthesis is a challenging task. Newer technologies such as computer assisted design computer assisted manufacturing (CAD CAM and cone beam conventional tomography play an important role in achieving predictable results. Full mouth porcelain fused to metal (PFM individual crowns on CAD CAM milled titanium framework provides positive esthetic and functional outcome. This is a case report of rehabilitation of partially edentulous maxillary arch patient. Staged rehabilitation of this patient was planned. In the first stage, root canal treatment of key abutment teeth was done, nonsalvageable teeth were removed, and immediate interim overdenture was provided. In the second stage, five Nobel Biocare dental implants were placed. After integration impressions were made, CAD CAM milled titanium bar was fabricated. Individual PFM crowns were made and cemented. This method gives better esthetic compared to acrylic fused to metal hybrid prosthesis with the advantage of retrievability just like screw retained prosthesis. Hence, this technique is good for rehabilitation of patients with high esthetic demands.

  14. Is Computer-assisted Distance Learning Possible in Nematology? (United States)

    Francl, L J


    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.

  15. Computer-assisted detection of epileptiform focuses on SPECT images (United States)

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


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

  16. Potential of Cognitive Computing and Cognitive Systems (United States)

    Noor, Ahmed K.


    Cognitive computing and cognitive technologies are game changers for future engineering systems, as well as for engineering practice and training. They are major drivers for knowledge automation work, and the creation of cognitive products with higher levels of intelligence than current smart products. This paper gives a brief review of cognitive computing and some of the cognitive engineering systems activities. The potential of cognitive technologies is outlined, along with a brief description of future cognitive environments, incorporating cognitive assistants - specialized proactive intelligent software agents designed to follow and interact with humans and other cognitive assistants across the environments. The cognitive assistants engage, individually or collectively, with humans through a combination of adaptive multimodal interfaces, and advanced visualization and navigation techniques. The realization of future cognitive environments requires the development of a cognitive innovation ecosystem for the engineering workforce. The continuously expanding major components of the ecosystem include integrated knowledge discovery and exploitation facilities (incorporating predictive and prescriptive big data analytics); novel cognitive modeling and visual simulation facilities; cognitive multimodal interfaces; and cognitive mobile and wearable devices. The ecosystem will provide timely, engaging, personalized / collaborative, learning and effective decision making. It will stimulate creativity and innovation, and prepare the participants to work in future cognitive enterprises and develop new cognitive products of increasing complexity.

  17. Computer Assisted Semen Analysis of Epididymal Spermatozoa after an Interperitoneal Administration of Diazinon and Cadmium


    Maria Adamkovicova; Robert Toman; Michal Cabaj; Svatoslav Hluchy; Peter Massanyi; Norbert Lukac; Monika Martiniaková


    The effects of cadmium and diazinon administration on rat sperm motility parameters were performed using a Computer Assisted Semen Analyzer (CASA) system. CASA was made on semen samples collected 36 h following an intraperitoneal injection of physiological solution (control group), diazinon (20 mg/kg body wt), cadmium (2 mg/kg body wt), separately and in combination. Sperm kinematic measurements revealed significant decline in the percentage of motile spermatozoa (P<0.05), significant high...

  18. Factors affecting the use of computer assisted learning by further education biology teachers


    Barnard, Jane


    The UK educational system is currently under pressure from many quarters to increase its use of educational technology. Within this context, this thesis investigates the nature of a range of factors which influence teachers' use of computer assisted learning (CAL), focusing on biology teachers in Further Education (FE). The factors were identified from the literature, and include aspects such as resourcing, and the teachers' classroom practice and educational philosophies.\\ud \\ud There were t...

  19. 16th International Conference on Medical Image Computing and Computer Assisted Intervention

    CERN Document Server

    Klinder, Tobias; Li, Shuo


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

  20. User computer system pilot project

    Energy Technology Data Exchange (ETDEWEB)

    Eimutis, E.C.


    The User Computer System (UCS) is a general purpose unclassified, nonproduction system for Mound users. The UCS pilot project was successfully completed, and the system currently has more than 250 users. Over 100 tables were installed on the UCS for use by subscribers, including tables containing data on employees, budgets, and purchasing. In addition, a UCS training course was developed and implemented.

  1. Implementation of computer assisted assessment: lessons from the literature

    Directory of Open Access Journals (Sweden)

    Gavin Sim


    Full Text Available This paper draws attention to literature surrounding the subject of computer-assisted assessment (CAA. A brief overview of traditional methods of assessment is presented, highlighting areas of concern in existing techniques. CAA is then defined, and instances of its introduction in various educational spheres are identified, with the main focus of the paper concerning the implementation of CAA. Through referenced articles, evidence is offered to inform practitioners, and direct further research into CAA from a technological and pedagogical perspective. This includes issues relating to interoperability of questions, security, test construction and testing higher cognitive skills. The paper concludes by suggesting that an institutional strategy for CAA coupled with staff development in test construction for a CAA environment can increase the chances of successful implementation.

  2. Computer assisted screening, correction, and analysis of historical weather measurements (United States)

    Burnette, Dorian J.; Stahle, David W.


    A computer program, Historical Observation Tools (HOB Tools), has been developed to facilitate many of the calculations used by historical climatologists to develop instrumental and documentary temperature and precipitation datasets and makes them readily accessible to other researchers. The primitive methodology used by the early weather observers makes the application of standard techniques difficult. HOB Tools provides a step-by-step framework to visually and statistically assess, adjust, and reconstruct historical temperature and precipitation datasets. These routines include the ability to check for undocumented discontinuities, adjust temperature data for poor thermometer exposures and diurnal averaging, and assess and adjust daily precipitation data for undercount. This paper provides an overview of the Visual Basic.NET program and a demonstration of how it can assist in the development of extended temperature and precipitation datasets using modern and early instrumental measurements from the United States.

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

    Directory of Open Access Journals (Sweden)

    Törcsvári Attila


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

  4. Microwave assisted pyrolysis of halogenated plastics recovered from waste computers. (United States)

    Rosi, Luca; Bartoli, Mattia; Frediani, Marco


    Microwave Assisted Pyrolysis (MAP) of the plastic fraction of Waste from Electric and Electronic Equipment (WEEE) from end-life computers was run with different absorbers and set-ups in a multimode batch reactor. A large amount of various different liquid fractions (up to 76.6wt%) were formed together with a remarkable reduction of the solid residue (up to 14.2wt%). The liquid fractions were characterized using the following different techniques: FT-IR ATR, 1H NMR and a quantitative GC-MS analysis. The liquid fractions showed low density and viscosity, together with a high concentration of useful chemicals such as styrene (up to 117.7mg/mL), xylenes (up to 25.6mg/mL for p-xylene) whereas halogenated compounds were absent or present in a very low amounts. Copyright © 2017 Elsevier Ltd. All rights reserved.

  5. From assistance towards restoration with epidural brain-computer interfacing. (United States)

    Gharabaghi, Alireza; Naros, Georgios; Walter, Armin; Grimm, Florian; Schuermeyer, Marc; Roth, Alexander; Bogdan, Martin; Rosenstiel, Wolfgang; Birbaumer, Niels


    Today's implanted brain-computer interfaces make direct contact with the brain or even penetrate the tissue, bearing additional risks with regard to safety and stability. What is more, these approaches aim to control prosthetic devices as assistive tools and do not yet strive to become rehabilitative tools for restoring lost motor function. We introduced a less invasive, implantable interface by applying epidural electrocorticography in a chronic stroke survivor with a persistent motor deficit. He was trained to modulate his natural motor-related oscillatory brain activity by receiving online feedback. Epidural recordings of field potentials in the beta-frequency band projecting onto the anatomical hand knob proved most successful in discriminating between the attempt to move the paralyzed hand and to rest. These spectral features allowed for fast and reliable control of the feedback device in an online closed-loop paradigm. Only seven training sessions were required to significantly improve maximum wrist extension. For patients suffering from severe motor deficits, epidural implants may decode and train the brain activity generated during attempts to move with high spatial resolution, thus facilitating specific and high-intensity practice even in the absence of motor control. This would thus transform them from pure assistive devices to restorative tools in the context of reinforcement learning and neurorehabilitation.

  6. Design of Intelligent Robot as A Tool for Teaching Media Based on Computer Interactive Learning and Computer Assisted Learning to Improve the Skill of University Student (United States)

    Zuhrie, M. S.; Basuki, I.; Asto B, I. G. P.; Anifah, L.


    The focus of the research is the teaching module which incorporates manufacturing, planning mechanical designing, controlling system through microprocessor technology and maneuverability of the robot. Computer interactive and computer-assisted learning is strategies that emphasize the use of computers and learning aids (computer assisted learning) in teaching and learning activity. This research applied the 4-D model research and development. The model is suggested by Thiagarajan, (1974). 4-D Model consists of four stages: Define Stage, Design Stage, Develop Stage, and Disseminate Stage. This research was conducted by applying the research design development with an objective to produce a tool of learning in the form of intelligent robot modules and kit based on Computer Interactive Learning and Computer Assisted Learning. From the data of the Indonesia Robot Contest during the period of 2009-2015, it can be seen that the modules that have been developed confirm the fourth stage of the research methods of development; disseminate method. The modules which have been developed for students guide students to produce Intelligent Robot Tool for Teaching Based on Computer Interactive Learning and Computer Assisted Learning. Results of students’ responses also showed a positive feedback to relate to the module of robotics and computer-based interactive learning.

  7. Cedar Avenue driver assist system evaluation report. (United States)


    This paper summarizes an evaluation of the Driver Assist System (DAS) used by the Minnesota Valley Transit Authority (MTVA) for bus shoulder operations. The DAS is a GPS-based technology suite that provides lane-position feedback to the driver via a ...

  8. Operating systems. [of computers (United States)

    Denning, P. J.; Brown, R. L.


    A counter operating system creates a hierarchy of levels of abstraction, so that at a given level all details concerning lower levels can be ignored. This hierarchical structure separates functions according to their complexity, characteristic time scale, and level of abstraction. The lowest levels include the system's hardware; concepts associated explicitly with the coordination of multiple tasks appear at intermediate levels, which conduct 'primitive processes'. Software semaphore is the mechanism controlling primitive processes that must be synchronized. At higher levels lie, in rising order, the access to the secondary storage devices of a particular machine, a 'virtual memory' scheme for managing the main and secondary memories, communication between processes by way of a mechanism called a 'pipe', access to external input and output devices, and a hierarchy of directories cataloguing the hardware and software objects to which access must be controlled.

  9. Computer System Design System-on-Chip

    CERN Document Server

    Flynn, Michael J


    The next generation of computer system designers will be less concerned about details of processors and memories, and more concerned about the elements of a system tailored to particular applications. These designers will have a fundamental knowledge of processors and other elements in the system, but the success of their design will depend on the skills in making system-level tradeoffs that optimize the cost, performance and other attributes to meet application requirements. This book provides a new treatment of computer system design, particularly for System-on-Chip (SOC), which addresses th

  10. Towards computer-assisted surgery in shoulder joint replacement (United States)

    Valstar, Edward R.; Botha, Charl P.; van der Glas, Marjolein; Rozing, Piet M.; van der Helm, Frans C. T.; Post, Frits H.; Vossepoel, Albert M.

    A research programme that aims to improve the state of the art in shoulder joint replacement surgery has been initiated at the Delft University of Technology. Development of improved endoprostheses for the upper extremities (DIPEX), as this effort is called, is a clinically driven multidisciplinary programme consisting of many contributory aspects. A part of this research programme focuses on the pre-operative planning and per-operative guidance issues. The ultimate goal of this part of the DIPEX project is to create a surgical support infrastructure that can be used to predict the optimal surgical protocol and can assist with the selection of the most suitable endoprosthesis for a particular patient. In the pre-operative planning phase, advanced biomechanical models of the endoprosthesis fixation and the musculo-skeletal system of the shoulder will be incorporated, which are adjusted to the individual's morphology. Subsequently, the support infrastructure must assist the surgeon during the operation in executing his surgical plan. In the per-operative phase, the chosen optimal position of the endoprosthesis can be realised using camera-assisted tools or mechanical guidance tools. In this article, the pathway towards the desired surgical support infrastructure is described. Furthermore, we discuss the pre-operative planning phase and the per-operative guidance phase, the initial work performed, and finally, possible approaches for improving prosthesis placement.

  11. 21 CFR 884.6200 - Assisted reproduction laser system. (United States)


    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Assisted reproduction laser system. 884.6200... (CONTINUED) MEDICAL DEVICES OBSTETRICAL AND GYNECOLOGICAL DEVICES Assisted Reproduction Devices § 884.6200 Assisted reproduction laser system. (a) Identification. The assisted reproduction laser system is a device...

  12. Aviation System Analysis Capability Executive Assistant Design (United States)

    Roberts, Eileen; Villani, James A.; Osman, Mohammed; Godso, David; King, Brent; Ricciardi, Michael


    In this technical document, we describe the design developed for the Aviation System Analysis Capability (ASAC) Executive Assistant (EA) Proof of Concept (POC). We describe the genesis and role of the ASAC system, discuss the objectives of the ASAC system and provide an overview of components and models within the ASAC system, and describe the design process and the results of the ASAC EA POC system design. We also describe the evaluation process and results for applicable COTS software. The document has six chapters, a bibliography, three appendices and one attachment.

  13. Survivable Avionics Computer System. (United States)


    T. HALL AFWAL/AAA-1 SCONTRACT F33-615-80-C-1014 SRI Project 1314 E~J Approved by: CHARLES J. SHOENS, Director Systems Techniques Laboratory DAVID A...4 U3.3.3. U3.3.3. 3.3, ~l3.U OXZrZrZr -Z~ 31Zr31Zr I- o - NOIA . 3,3. 3,3. 3𔃽, 3~3, -- Zr -Zr A .4 .4 3, 3, 3, t-~ 3, ~3,3, .03~ .03, 3,3.4 3,3

  14. Management Information System & Computer Applications


    Sreeramana Aithal


    The book contains following Chapters : Chapter 1 : Introduction to Management Information Systems, Chapter 2 : Structure of MIS, Chapter 3 : Planning for MIS, Chapter 4 : Introduction to Computers Chapter 5 : Decision Making Process in MIS Chapter 6 : Approaches for System Development Chapter 7 : Form Design Chapter 8 : Charting Techniques Chapter 9 : System Analysis & Design Chapter 10 : Applications of MIS in Functional Areas Chapter 11 : System Implement...

  15. Computer-assisted ultrasonic tissue characterization of the heart (United States)

    Berger, Reinhard; Lieback, Evelin; Hetzer, Roland


    In ultrasonic tissue characterization the small reflections originating from the scattering structures inside the tissue are analyzed. To obtain diagnostic performance for tissue characterization by means of analysis of echocardiographic images we use methods of mathematical texture analysis. We investigate whether myocardial changes effect the texture of ultrasonic images and if this could be described using quantitative texture analysis. The texture analysis was computed in a single window of an ultrasound image/sequence covering the inner myocardial septum. Parameters from gray level histogram, co-occurrence matrices, run length statistics and run difference, from power spectrum and fractal dimensions were investigated to provide satisfying and generalizable results for classification of the myocardium. A set of parameters that could discriminate between normal and pathological myocardium were extracted. The results of 142 biopsies were compared with those of texture analysis in echocardiograms of 106 patients suspected having myocarditis. Using the reduced set of parameters the best sensitivity was 89.0% and the specificity was 83.6%. Myocarditis is associated with echocardiographic texture alteration. Texture analysis with methods of digital image processing can reliably identify myocarditis. A suitable solution for a computer-assisted non- invasive support for the diagnosis and detection of myocarditis was found.

  16. Clinician attitudes, social norms and intentions to use a computer-assisted intervention. (United States)

    Buti, Allison L; Eakins, Danielle; Fussell, Holly; Kunkel, Lynn E; Kudura, Aisha; McCarty, Dennis


    The National Drug Abuse Treatment Clinical Trials Network (CTN) works to bridge the gap between research and practice and tested a Web-delivered psychosocial intervention (the Therapeutic Education System, TES) in 10 community treatment centers. Computer-assisted therapies, such as Web-delivered interventions, may improve the consistency and efficiency of treatment for alcohol and drug use disorders. Prior to the start of the study, we surveyed counselors (N=96) in participating treatment centers and assessed counselor attitudes, perceived social norms and intentions to use a Web-delivered intervention. Analysis of the intention to adopt a Web-delivered intervention assessed the influence of attitudes and perceived social norms. Perceived social norms were a significant contributor to clinician intention to adopt Web-based interventions while attitude was not. To promote successful implementation, it may be helpful to create social norms supportive of computer-assisted therapies. Copyright © 2013 Elsevier Inc. All rights reserved.

  17. Computer-assisted interpretation of the EEG background pattern: a clinical evaluation.

    Directory of Open Access Journals (Sweden)

    Shaun S Lodder

    Full Text Available OBJECTIVE: Interpretation of the EEG background pattern in routine recordings is an important part of clinical reviews. We evaluated the feasibility of an automated analysis system to assist reviewers with evaluation of the general properties in the EEG background pattern. METHODS: Quantitative eeg methods were used to describe the following five background properties: posterior dominant rhythm frequency and reactivity, anterior-posterior gradients, presence of diffuse slow-wave activity and asymmetry. Software running the quantitative methods were given to ten experienced electroencephalographers together with 45 routine EEG recordings and computer-generated reports. Participants were asked to review the EEGs by visual analysis first, and afterwards to compare their findings with the generated reports and correct mistakes made by the system. Corrected reports were returned for comparison. RESULTS: Using a gold-standard derived from the consensus of reviewers, inter-rater agreement was calculated for all reviewers and for automated interpretation. Automated interpretation together with most participants showed high (kappa > 0.6 agreement with the gold standard. In some cases, automated analysis showed higher agreement with the gold standard than participants. When asked in a questionnaire after the study, all participants considered computer-assisted interpretation to be useful for every day use in routine reviews. CONCLUSIONS: Automated interpretation methods proved to be accurate and were considered to be useful by all participants. SIGNIFICANCE: Computer-assisted interpretation of the EEG background pattern can bring consistency to reviewing and improve efficiency and inter-rater agreement.

  18. Computer assisted inventory control system | Dessalegn | Zede ...

    African Journals Online (AJOL)

    Zede Journal. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 19 (2002) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if your Web browser has a PDF ...

  19. Computer assisted inventory control system | Dessalegn | Zede ...

    African Journals Online (AJOL)

    aiding tools like selective inventory control techniques, EOQ determination, demand forecasting, statistical analysis etc. This paper briefly presents an integrated and systematic approach towards the management of independent demand ...

  20. The ALICE Magnetic System Computation.

    CERN Document Server

    Klempt, W; CERN. Geneva; Swoboda, Detlef


    In this note we present the first results from the ALICE magnetic system computation performed in the 3-dimensional way with the Vector Fields TOSCA code (version 6.5) [1]. To make the calculations we have used the IBM RISC System 6000-370 and 6000-550 machines combined in the CERN PaRC UNIX cluster.

  1. Computational Intelligence for Engineering Systems

    CERN Document Server

    Madureira, A; Vale, Zita


    "Computational Intelligence for Engineering Systems" provides an overview and original analysis of new developments and advances in several areas of computational intelligence. Computational Intelligence have become the road-map for engineers to develop and analyze novel techniques to solve problems in basic sciences (such as physics, chemistry and biology) and engineering, environmental, life and social sciences. The contributions are written by international experts, who provide up-to-date aspects of the topics discussed and present recent, original insights into their own experien

  2. Opportunity for Realizing Ideal Computing System using Cloud Computing Model


    Sreeramana Aithal; Vaikunth Pai T


    An ideal computing system is a computing system with ideal characteristics. The major components and their performance characteristics of such hypothetical system can be studied as a model with predicted input, output, system and environmental characteristics using the identified objectives of computing which can be used in any platform, any type of computing system, and for application automation, without making modifications in the form of structure, hardware, and software coding by an exte...

  3. An augmented reality framework for optimization of computer assisted navigation in endovascular surgery. (United States)

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


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

  4. Computer assisted orthopaedic and trauma surgery. State of the art and future perspectives

    NARCIS (Netherlands)

    Schep, N. W. L.; Broeders, I. A. M. J.; van der Werken, Chr


    In recent years computer technologies have become more and more integrated in surgical procedures. The potential advantages of computer assisted surgery (CAS) are: increase of accuracy of surgical interventions, less invasive operations, better planning and simulation and reduction of radiation

  5. Methodology for computer-assisted optimization of waste flow

    Directory of Open Access Journals (Sweden)

    Popa Cicerone Laurentiu


    Full Text Available The paper reports the development of a methodology based on computer simulations with the purpose to support decisions in designing the optimal architecture of different types of selective waste collection systems and recycling systems. The design of such systems is a complex task which involves both a very good knowledge of selective waste collection system equipment characteristics and of recycling processes, and the correct placing of the equipment along the flow so that to avoid underutilization of the structural elements and to avoid bottlenecks which generate low productivity or even blockages. The methodology is applied for three case studies in which different types of waste flow models are investigated: hybrid waste flows (windshields recycling, discrete waste flows (waste electric and electronic equipment collection and continuous flows (industrial and automotive used oil collection and recycling. The architectures of these systems are optimized using the developed methodology in order to increase usage degree and productivity.

  6. Issues in Intelligent Computer-Assisted Instruction. Testing Study Group: The Impact of Advances in Artificial Intelligence on Test Development. (United States)

    O'Neil, Harold F., Jr.; Baker, Eva L.

    Among opportunities to advance the state of the art of intelligent computer-assisted instruction (ICAI) are the evaluation of ICAI systems and the use of the underlying technology in ICAI systems to develop tests. Each issue is addressed via its theoretical context, key constructs, appropriate references to the literature, methodological aspects,…

  7. A Study on a Brain-Computer Interface for Motor Assist by Prefrontal Cortex (United States)

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

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

  8. Osmotically-assisted desalination method and system (United States)

    Achilli, Andrea; Childress, Amy E.; Cath, Tzahi Y.


    Systems and methods for osmotically assisted desalination include using a pressurized concentrate from a pressure desalination process to pressurize a feed to the desalination process. The depressurized concentrate thereby produced is used as a draw solution for a pressure-retarded osmosis process. The pressure-retarded osmosis unit produces a pressurized draw solution stream that is used to pressurize another feed to the desalination process. In one example, the feed to the pressure-retarded osmosis process is impaired water.

  9. A Hybrid Segmentation Framework for Computer-Assisted Dental Procedures (United States)

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

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

  10. Computer-assisted dieting: effects of a randomised controlled intervention. (United States)

    Schroder, Kerstin E E


    In this pilot study, the effects of two computer-assisted dieting (CAD) interventions on weight loss and blood chemistry were examined among overweight and obese adults. Participants (91 community members, average age 42.6 years) were randomly assigned to CAD-only (a single-session introduction and provision of a dieting software, n = 30), CAD plus an additional four-session self-management group training (CAD+G, n = 31) and a waitlist control group whose members were randomised into the two interventions at the 3-month follow-up (n = 30). A three (group)-by-two (time) repeated measures ANOVA revealed no significant group by time interaction during the initial 3-month period. However, the two intervention groups combined showed a significant, though moderate weight loss relative to the control group. Further, although a general improvement was found with regard to the lipid panel results during the first 3 months of the trial, the treatment by time interaction was not significant. A comparison of the developments in the two intervention groups during the 3- to 6-month follow-up time period revealed a tendency towards greater weight regain in the CAD-only condition. The evidence suggests that CAD supports initial weight loss; however, additional self-management training might be necessary to support maintenance.

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

    Directory of Open Access Journals (Sweden)

    César A. Cisneros Puebla


    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.

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

    Directory of Open Access Journals (Sweden)

    Debra M. Hardison


    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.

  13. Medical image computing and computer-assisted intervention - MICCAI 2006. Pt. 1. Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, R. [Technical Univ. of Denmark, Lyngby (Denmark). Informatics and Mathematical Modelling; Nielsen, M. [IT Univ. of Copenhagen (Denmark); Sporring, J. (eds.) [Copenhagen Univ. (Denmark). Dept. of Computer Science


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

  14. Medical image computing and computer-assisted intervention - MICCAI 2006. Pt. 2. Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, R. [Technical Univ. of Denmark, Lyngby (Denmark). Informatics and Mathematical Modelling; Nielsen, M. [IT Univ. of Copenhagen (Denmark); Sporring, J. (eds.) [Copenhagen Univ. (Denmark). Dept. of Computer Science


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

  15. Middle School Teachers' Perceptions of Computer-Assisted Reading Intervention Programs (United States)

    Bippert, Kelli; Harmon, Janis


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

  16. Public Computer Assisted Learning Facilities for Children with Visual Impairment: Universal Design for Inclusive Learning (United States)

    Siu, Kin Wai Michael; Lam, Mei Seung


    Although computer assisted learning (CAL) is becoming increasingly popular, people with visual impairment face greater difficulty in accessing computer-assisted learning facilities. This is primarily because most of the current CAL facilities are not visually impaired friendly. People with visual impairment also do not normally have access to…

  17. The Effect of Computer-Assisted Teaching on Remedying Misconceptions: The Case of the Subject "Probability" (United States)

    Gurbuz, Ramazan; Birgin, Osman


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

  18. Development of an Interactive Computer-Based Learning Strategy to Assist in Teaching Water Quality Modelling (United States)

    Zigic, Sasha; Lemckert, Charles J.


    The following paper presents a computer-based learning strategy to assist in introducing and teaching water quality modelling to undergraduate civil engineering students. As part of the learning strategy, an interactive computer-based instructional (CBI) aid was specifically developed to assist students to set up, run and analyse the output from a…

  19. Effect Sizes Associated with Micro-PROLOG-Based Computer-Assisted Learning. (United States)

    Fraser, Barry J.; Teh, George P. L.


    Discussion of effect sizes in computer-assisted learning research focuses on a study conducted in Singapore high school geography classes that used micro-PROLOG to determine the efficacy of computer-assisted learning. Topics include impact on achievement, student attitudes, and classroom environment. (53 references) (LRW)

  20. The Effects of Computer-Assisted Feedback Strategies in Technology Education: A Comparison of Learning Outcomes (United States)

    Adams, Ruifang Hope; Strickland, Jane


    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"…

  1. Applications of NLP Techniques to Computer-Assisted Authoring of Test Items for Elementary Chinese (United States)

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


    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…

  2. Visual Turing test for computer vision systems. (United States)

    Geman, Donald; Geman, Stuart; Hallonquist, Neil; Younes, Laurent


    Today, computer vision systems are tested by their accuracy in detecting and localizing instances of objects. As an alternative, and motivated by the ability of humans to provide far richer descriptions and even tell a story about an image, we construct a "visual Turing test": an operator-assisted device that produces a stochastic sequence of binary questions from a given test image. The query engine proposes a question; the operator either provides the correct answer or rejects the question as ambiguous; the engine proposes the next question ("just-in-time truthing"). The test is then administered to the computer-vision system, one question at a time. After the system's answer is recorded, the system is provided the correct answer and the next question. Parsing is trivial and deterministic; the system being tested requires no natural language processing. The query engine employs statistical constraints, learned from a training set, to produce questions with essentially unpredictable answers-the answer to a question, given the history of questions and their correct answers, is nearly equally likely to be positive or negative. In this sense, the test is only about vision. The system is designed to produce streams of questions that follow natural story lines, from the instantiation of a unique object, through an exploration of its properties, and on to its relationships with other uniquely instantiated objects.

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

    Energy Technology Data Exchange (ETDEWEB)

    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: [Department of Medical Ultrasonics, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou (China); Zheng, Hairong, E-mail: [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)


    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.

  4. The Future in Craniofacial Surgery: Computer-Assisted Planning

    Directory of Open Access Journals (Sweden)

    Stephen A. Schendel


    Full Text Available Advancements in computers, prototyping, and imaging, especially over the last 10 years, have permitted the adoption of three-dimensional imaging protocols in the health care field. In this article, the authors present an integrated simulation system for craniofacial surgical planning and treatment. Image fusion technology, which involves combining different imaging modalities, was utilized to create a realistic prototype and virtual image that can be manipulated in real time. The resultant data can then be shared over the Internet with distantly located practitioners.

  5. The Future in Craniofacial Surgery: Computer-Assisted Planning (United States)

    Schendel, Stephen A.; Hazan-Molina, Hagai; Rachmiel, Adi; Aizenbud, Dror


    Advancements in computers, prototyping, and imaging, especially over the last 10 years, have permitted the adoption of three-dimensional imaging protocols in the health care field. In this article, the authors present an integrated simulation system for craniofacial surgical planning and treatment. Image fusion technology, which involves combining different imaging modalities, was utilized to create a realistic prototype and virtual image that can be manipulated in real time. The resultant data can then be shared over the Internet with distantly located practitioners. PMID:23908836

  6. Computational models of complex systems

    CERN Document Server

    Dabbaghian, Vahid


    Computational and mathematical models provide us with the opportunities to investigate the complexities of real world problems. They allow us to apply our best analytical methods to define problems in a clearly mathematical manner and exhaustively test our solutions before committing expensive resources. This is made possible by assuming parameter(s) in a bounded environment, allowing for controllable experimentation, not always possible in live scenarios. For example, simulation of computational models allows the testing of theories in a manner that is both fundamentally deductive and experimental in nature. The main ingredients for such research ideas come from multiple disciplines and the importance of interdisciplinary research is well recognized by the scientific community. This book provides a window to the novel endeavours of the research communities to present their works by highlighting the value of computational modelling as a research tool when investigating complex systems. We hope that the reader...

  7. Assisted Learning Systems in e-Education

    Directory of Open Access Journals (Sweden)

    Gabriel ZAMFIR


    Full Text Available Human society, analyzed as a learning environment, presumes different languages in order to know, to understand or to develop it. This statement results as a default application of the cog-nitive domain in the educational scientific research, and it highlights a key feature: each essen-tial discovery was available for the entire language compatible society. E-Society is constructed as an application of E-Science in social services, and it is going to reveal a learning system for each application of the information technology developed for a compatible society. This article is proposed as a conceptual one focused on scientific research and the interrelationship be-tween the building blocks of research, defined as an engine for any designed learning system applied in the cognitive domain. In this approach, educational research become a learning sys-tem in e-Education. The purpose of this analysis is to configure the teacher assisted learning system and to expose its main principles which could be integrated in standard assisted instruc-tion applications, available in e-Classroom, supporting the design of specific didactic activities.

  8. Manual vs. computer-assisted sperm analysis: can CASA replace manual assessment of human semen in clinical practice? (United States)

    Talarczyk-Desole, Joanna; Berger, Anna; Taszarek-Hauke, Grażyna; Hauke, Jan; Pawelczyk, Leszek; Jedrzejczak, Piotr


    The aim of the study was to check the quality of computer-assisted sperm analysis (CASA) system in comparison to the reference manual method as well as standardization of the computer-assisted semen assessment. The study was conducted between January and June 2015 at the Andrology Laboratory of the Division of Infertility and Reproductive Endocrinology, Poznań University of Medical Sciences, Poland. The study group consisted of 230 men who gave sperm samples for the first time in our center as part of an infertility investigation. The samples underwent manual and computer-assisted assessment of concentration, motility and morphology. A total of 184 samples were examined twice: manually, according to the 2010 WHO recommendations, and with CASA, using the program set-tings provided by the manufacturer. Additionally, 46 samples underwent two manual analyses and two computer-assisted analyses. The p-value of p CASA and manually. In the group of patients where all analyses with each method were performed twice on the same sample we found no significant differences between both assessments of the same probe, neither in the samples analyzed manually nor with CASA, although standard deviation was higher in the CASA group. Our results suggest that computer-assisted sperm analysis requires further improvement for a wider application in clinical practice.

  9. Modelbased and operator assisted computer vision in ROV teleoperation

    Energy Technology Data Exchange (ETDEWEB)

    Volden, R.


    This thesis proposes an operator assisted vision system for use in a Remotely Operated Vehicle (ROV) environment. The vision system obtains position and orientation of the camera and objects in an underwater environment. Object recognition is useful for maneuvering a vehicle in an unknown environment. A three-dimensional map of the environment can, with the help of an operator, be made from a set of images. In a man-made environment of pipe-, polyhedron-, and sphere structures, it is necessary to map these objects and navigate accordingly to their positions and orientations. This thesis presents new methods of how to extract the pose of cylinders, spheres and planes from two-dimensional images using projective geometry. When the camera position and orientation are known, predicted or estimated, new methods of how to extract the pose of planar objects are proposed. Examples and results are given. An improved version of a standard method for determining the position and orientation of the camera is also proposed. There are two main issues in the thesis: (1) How can three-dimensional man-made objects be reconstructed from two-dimensional images? (2) How can the ROV be navigated from images of known objects in a model of the underwater environment? With some limitations and constraints, answers are provided. 114 refs., 47 figs., 16 tabs.

  10. Automated storage and retrieval of thin-section CT images to assist diagnosis: system description and preliminary assessment. (United States)

    Aisen, Alex M; Broderick, Lynn S; Winer-Muram, Helen; Brodley, Carla E; Kak, Avinash C; Pavlopoulou, Christina; Dy, Jennifer; Shyu, Chi-Ren; Marchiori, Alan


    A software system and database for computer-aided diagnosis with thin-section computed tomographic (CT) images of the chest was designed and implemented. When presented with an unknown query image, the system uses pattern recognition to retrieve visually similar images with known diagnoses from the database. A preliminary validation trial was conducted with 11 volunteers who were asked to select the best diagnosis for a series of test images, with and without software assistance. The percentage of correct answers increased from 29% to 62% with computer assistance. This finding suggests that this system may be useful for computer-assisted diagnosis.

  11. Computer-Assisted Language Learning (CALL) in support of (re-)learning native languages : The case of Runyakitara.

    NARCIS (Netherlands)

    Katushemererwe, Fridah; Nerbonne, John


    This study presents the results from a computer-assisted language learning (CALL) system of Runyakitara (RU_CALL). The major objective was to provide an electronic language learning environment that can enable learners with mother tongue deficiencies to enhance their knowledge of grammar and acquire

  12. Computer-Assisted Language Learning (CALL) in Support of (Re)-Learning Native Languages: The Case of Runyakitara (United States)

    Katushemererwe, Fridah; Nerbonne, John


    This study presents the results from a computer-assisted language learning (CALL) system of Runyakitara (RU_CALL). The major objective was to provide an electronic language learning environment that can enable learners with mother tongue deficiencies to enhance their knowledge of grammar and acquire writing skills in Runyakitara. The system…

  13. Computer-Assisted, Counselor-Delivered Smoking Cessation Counseling for Community College Students: Intervention Approach and Sample Characteristics (United States)

    Prokhorov, Alexander V.; Fouladi, Rachel T.; de Moor, Carl; Warneke, Carla L.; Luca, Mario; Jones, Mary Mullin; Rosenblum, Carol; Emmons, Karen M.; Hudmon, Karen Suchanek; Yost, Tracey E.; Gritz, Ellen R.


    This report presents the experimental approach and baseline findings from "Look at Your Health," an ongoing study to develop and evaluate a computer-assisted, counselor-delivered smoking cessation program for community college students. It describes the expert system software program used for data collection and for provision of tailored feedback,…

  14. Computer Networks A Systems Approach

    CERN Document Server

    Peterson, Larry L


    This best-selling and classic book teaches you the key principles of computer networks with examples drawn from the real world of network and protocol design. Using the Internet as the primary example, the authors explain various protocols and networking technologies. Their systems-oriented approach encourages you to think about how individual network components fit into a larger, complex system of interactions. Whatever your perspective, whether it be that of an application developer, network administrator, or a designer of network equipment or protocols, you will come away with a "big pictur

  15. Exploring the experience of clients with tetraplegia utilizing assistive technology for computer access. (United States)

    Folan, Alyce; Barclay, Linda; Cooper, Cathy; Robinson, Merren


    Assistive technology for computer access can be used to facilitate people with a spinal cord injury to utilize mainstream computer applications, thereby enabling participation in a variety of meaningful occupations. The aim of this study was to gain an understanding of the experiences of clients with tetraplegia trialing assistive technologies for computer access during different stages in a public rehabilitation service. In order to explore the experiences of clients with tetraplegia trialing assistive technologies for computer use, qualitative methodology was selected. Data were collected from seven participants using semi-structured interviews, which were audio-taped, transcribed and analyzed thematically. Three main themes were identified. These were: getting back into life, assisting in adjusting to injury and learning new skills. The findings from this study demonstrated that people with tetraplegia can be assisted to return to previous life roles or engage in new roles, through developing skills in the use of assistive technology for computer access. Being able to use computers for meaningful activities contributed to the participants gaining an enhanced sense of self-efficacy, and thereby quality of life. Implications for Rehabilitation Findings from this pilot study indicate that people with tetraplegia can be assisted to return to previous life roles, and develop new roles that have meaning to them through the use of assistive technologies for computer use. Being able to use the internet to socialize, and complete daily tasks, contributed to the participants gaining a sense of control over their lives. Early introduction to assistive technology is important to ensure sufficient time for newly injured people to feel comfortable enough with the assistive technology to use the computers productively by the time of discharge. Further research into this important and expanding area is indicated.

  16. Automated validation of a computer operating system (United States)

    Dervage, M. M.; Milberg, B. A.


    Programs apply selected input/output loads to complex computer operating system and measure performance of that system under such loads. Technique lends itself to checkout of computer software designed to monitor automated complex industrial systems.

  17. Innovation in engineering education through computer assisted learning and virtual university model (United States)

    Raicu, A.; Raicu, G.


    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

  18. The Effects of Gender on the Attitudes towards the Computer Assisted Instruction: A Meta-Analysis (United States)

    Cam, Sefika Sumeyye; Yarar, Gokhan; Toraman, Cetin; Erdamar, Gurcu Koc


    The idea that gender factor creates a difference on computer usage and computer-assisted instruction is based upon previous years. At that time, it was thought that some areas like engineering, science and mathematics were for males so it created a difference on the computer usage. Nevertheless, developing technology and females becoming more…

  19. Accuracy study of new computer-assisted orthopedic surgery software

    Energy Technology Data Exchange (ETDEWEB)

    Sidon, Eli [Department of Orthopaedic Surgery, Beilinson-Rabin Medical Center, Petach Tikva (Israel); Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv (Israel); Steinberg, Ely L., E-mail: [Department of Orthopaedic Surgery, Tel-Aviv Medical Center, Tel Aviv (Israel); Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv (Israel)


    Purpose: The new computerized system is based on image analysis and designed to aid in orthopedic surgeries by virtual trajectory of the guide wire, intra-operative planning and various measurements. Validation of the accuracy and safety of any computer-aided surgery system is essential before implementing it clinically. We examined the accuracy of guide-wire length and angle measurements and fusion of multiple adjacent images (panoramic view image, PVI{sup ®}) of the new software. Methods: This is a 2-part study. Part I: twenty guide wires were drilled to various depths in a synthetic femur model and the results obtained by the software measurements were compared with manual measurements by a caliper and a depth gauge. Part II: a sawbone femur shaft was osteotomized and various inclinations of >10° to the varus or valgus angles were tested. The manually obtained measurements of angles and lengths were compared to the new computerized system software PVI. Results: There was a significant positive linear correlation between all groups of the computerized length and the control measurements (r > 0.983, p < 0.01). There was no significant difference among different distances, angles or positions from the image intensifier. There was a significant positive linear correlation between the angle and length measurement on the PVI and the control measurement (r > 0.993, p < 0.01). Conclusions: The new computerized software has high reliability in performing measurements of length using an aiming, positioning and referring device intra-operatively.


    Directory of Open Access Journals (Sweden)

    F. M Sarraipa


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

  1. Patient assistive system for the shoulder joint

    Directory of Open Access Journals (Sweden)

    Scheuner Erika


    Full Text Available The mobility of the upper extremity is essential for everyday activities and for independent living. Shoulder disorders affect the range of motion, therefore a patient assistive system (PAS for the shoulder joint can be used to compensate the restrictions. The developed PAS supports up to 120° of flexion and abduction. The portable dynamic orthotic consists of two levers and is attached to a hip belt. The upper arm of the patient is connected to the device using a brace. The prototype is driven by one motor and controlled by surface electromyography (EMG. The functionality of the system was successfully verified by tests with healthy subjects. For further development, a study with shoulder patients will be performed and health professionals will evaluate the PAS.

  2. Computer aided training system development

    Energy Technology Data Exchange (ETDEWEB)

    Midkiff, G.N. (Advanced Technology Engineering Systems, Inc., Savannah, GA (US))


    The first three phases of Training System Development (TSD) -- job and task analysis, curriculum design, and training material development -- are time consuming and labor intensive. The use of personal computers with a combination of commercial and custom-designed software resulted in a significant reduction in the man-hours required to complete these phases for a Health Physics Technician Training Program at a nuclear power station. This paper reports that each step in the training program project involved the use of personal computers: job survey data were compiled with a statistical package, task analysis was performed with custom software designed to interface with a commercial database management program. Job Performance Measures (tests) were generated by a custom program from data in the task analysis database, and training materials were drafted, edited, and produced using commercial word processing software.


    Wette, M. R.


    Many developers of software and algorithms for control system design have recognized that current tools have limits in both flexibility and efficiency. Many forces drive the development of new tools including the desire to make complex system modeling design and analysis easier and the need for quicker turnaround time in analysis and design. Other considerations include the desire to make use of advanced computer architectures to help in control system design, adopt new methodologies in control, and integrate design processes (e.g., structure, control, optics). CAESY was developed to provide a means to evaluate methods for dealing with user needs in computer-aided control system design. It is an interpreter for performing engineering calculations and incorporates features of both Ada and MATLAB. It is designed to be reasonably flexible and powerful. CAESY includes internally defined functions and procedures, as well as user defined ones. Support for matrix calculations is provided in the same manner as MATLAB. However, the development of CAESY is a research project, and while it provides some features which are not found in commercially sold tools, it does not exhibit the robustness that many commercially developed tools provide. CAESY is written in C-language for use on Sun4 series computers running SunOS 4.1.1 and later. The program is designed to optionally use the LAPACK math library. The LAPACK math routines are available through anonymous ftp from CAESY requires 4Mb of RAM for execution. The standard distribution medium is a .25 inch streaming magnetic tape cartridge (QIC-24) in UNIX tar format. CAESY was developed in 1993 and is a copyrighted work with all copyright vested in NASA.

  4. Robotically assisted MRgFUS system (United States)

    Jenne, Jürgen W.; Krafft, Axel J.; Maier, Florian; Rauschenberg, Jaane; Semmler, Wolfhard; Huber, Peter E.; Bock, Michael


    Magnetic resonance imaging guided focus ultrasound surgery (MRgFUS) is a highly precise method to ablate tissue non-invasively. The objective of this ongoing work is to establish an MRgFUS therapy unit consisting of a specially designed FUS applicator as an add-on to a commercial robotic assistance system originally designed for percutaneous needle interventions in whole-body MRI systems. The fully MR compatible robotic assistance system InnoMotion™ (Synthes Inc., West Chester, USA; formerly InnoMedic GmbH, Herxheim, Germany) offers six degrees of freedom. The developed add-on FUS treatment applicator features a fixed focus ultrasound transducer (f = 1.7 MHz; f' = 68 mm, NA = 0.44, elliptical shaped -6-dB-focus: 8.1 mm length; O/ = 1.1 mm) embedded in a water-filled flexible bellow. A Mylar® foil is used as acoustic window encompassed by a dedicated MRI loop coil. For FUS application, the therapy unit is directly connected to the head of the robotic system, and the treatment region is targeted from above. A newly in-house developed software tool allowed for complete remote control of the MRgFUS-robot system and online analysis of MRI thermometry data. The system's ability for therapeutic relevant focal spot scanning was tested in a closed-bore clinical 1.5 T MR scanner (Magnetom Symphony, Siemens AG, Erlangen, Germany) in animal experiments with pigs. The FUS therapy procedure was performed entirely under MRI guidance including initial therapy planning, online MR-thermometry, and final contrast enhanced imaging for lesion detection. In vivo trials proved the MRgFUS-robot system as highly MR compatible. MR-guided focal spot scanning experiments were performed and a well-defined pattern of thermal tissue lesions was created. A total in vivo positioning accuracy of the US focus better than 2 mm was estimated which is comparable to existing MRgFUS systems. The newly developed FUS-robotic system offers an accurate, highly flexible focus positioning. With its access

  5. GALE: a graphics assisted learning environment for computer-based interactive videodisc education. (United States)

    Cutts, J H; Hazelwood, S E; Mitchell, J A; Bridges, A J; Reid, J C


    GALE, a Graphics Assisted Learning Environment, is a computer-based interactive videodisc authoring tool. GALE was created as the authoring package for AI/LEARN/Rheumatology, an independent study system for teaching rheumatology to medical trainees. GALE has potential widespread application beyond rheumatology. Interactive videodisc technology is a prime feature of GALE. Other highlights are: WordPerfect macros which simplify programming, graphics-based large text characters, tracking of user responses, hypertext-like definition capabilities, color coded screens to distinguish between hypertext branches and the mainstream of the course content and ability to overlay text on the video image. GALE runs on a PC-compatible computer with selected Pioneer LaserDisc players. GALE uses WordPerfect 5.1 for text editing and has been designed for use by non-programmers.

  6. Automated Computer Access Request System (United States)

    Snook, Bryan E.


    The Automated Computer Access Request (AutoCAR) system is a Web-based account provisioning application that replaces the time-consuming paper-based computer-access request process at Johnson Space Center (JSC). Auto- CAR combines rules-based and role-based functionality in one application to provide a centralized system that is easily and widely accessible. The system features a work-flow engine that facilitates request routing, a user registration directory containing contact information and user metadata, an access request submission and tracking process, and a system administrator account management component. This provides full, end-to-end disposition approval chain accountability from the moment a request is submitted. By blending both rules-based and rolebased functionality, AutoCAR has the flexibility to route requests based on a user s nationality, JSC affiliation status, and other export-control requirements, while ensuring a user s request is addressed by either a primary or backup approver. All user accounts that are tracked in AutoCAR are recorded and mapped to the native operating system schema on the target platform where user accounts reside. This allows for future extensibility for supporting creation, deletion, and account management directly on the target platforms by way of AutoCAR. The system s directory-based lookup and day-today change analysis of directory information determines personnel moves, deletions, and additions, and automatically notifies a user via e-mail to revalidate his/her account access as a result of such changes. AutoCAR is a Microsoft classic active server page (ASP) application hosted on a Microsoft Internet Information Server (IIS).

  7. Computers as components principles of embedded computing system design

    CERN Document Server

    Wolf, Marilyn


    Computers as Components: Principles of Embedded Computing System Design, 3e, presents essential knowledge on embedded systems technology and techniques. Updated for today's embedded systems design methods, this edition features new examples including digital signal processing, multimedia, and cyber-physical systems. Author Marilyn Wolf covers the latest processors from Texas Instruments, ARM, and Microchip Technology plus software, operating systems, networks, consumer devices, and more. Like the previous editions, this textbook: Uses real processors to demonstrate both technology and tec

  8. Research on computer systems benchmarking (United States)

    Smith, Alan Jay (Principal Investigator)


    This grant addresses the topic of research on computer systems benchmarking and is more generally concerned with performance issues in computer systems. This report reviews work in those areas during the period of NASA support under this grant. The bulk of the work performed concerned benchmarking and analysis of CPUs, compilers, caches, and benchmark programs. The first part of this work concerned the issue of benchmark performance prediction. A new approach to benchmarking and machine characterization was reported, using a machine characterizer that measures the performance of a given system in terms of a Fortran abstract machine. Another report focused on analyzing compiler performance. The performance impact of optimization in the context of our methodology for CPU performance characterization was based on the abstract machine model. Benchmark programs are analyzed in another paper. A machine-independent model of program execution was developed to characterize both machine performance and program execution. By merging these machine and program characterizations, execution time can be estimated for arbitrary machine/program combinations. The work was continued into the domain of parallel and vector machines, including the issue of caches in vector processors and multiprocessors. All of the afore-mentioned accomplishments are more specifically summarized in this report, as well as those smaller in magnitude supported by this grant.

  9. Automated anatomical description of pleural thickening towards improvement of its computer-assisted diagnosis (United States)

    Chaisaowong, Kraisorn; Jiang, Mingze; Faltin, Peter; Merhof, Dorit; Eisenhawer, Christian; Gube, Monika; Kraus, Thomas


    Pleural thickenings are caused by asbestos exposure and may evolve into malignant pleural mesothelioma. An early diagnosis plays a key role towards an early treatment and an increased survival rate. Today, pleural thickenings are detected by visual inspection of CT data, which is time-consuming and underlies the physician's subjective judgment. A computer-assisted diagnosis system to automatically assess pleural thickenings has been developed, which includes not only a quantitative assessment with respect to size and location, but also enhances this information with an anatomical description, i.e. lung side (left, right), part of pleura (pars costalis, mediastinalis, diaphragmatica, spinalis), as well as vertical (upper, middle, lower) and horizontal (ventral, dorsal) position. For this purpose, a 3D anatomical model of the lung surface has been manually constructed as a 3D atlas. Three registration sub-steps including rigid, affine, and nonrigid registration align the input patient lung to the 3D anatomical atlas model of the lung surface. Finally, each detected pleural thickening is assigned a set of labels describing its anatomical properties. Through this added information, an enhancement to the existing computer-assisted diagnosis system is presented in order to assure a higher precision and reproducible assessment of pleural thickenings, aiming at the diagnosis of the pleural mesothelioma in its early stage.

  10. Computer vision in control systems

    CERN Document Server

    Jain, Lakhmi


    Volume 1 : This book is focused on the recent advances in computer vision methodologies and technical solutions using conventional and intelligent paradigms. The Contributions include: ·         Morphological Image Analysis for Computer Vision Applications. ·         Methods for Detecting of Structural Changes in Computer Vision Systems. ·         Hierarchical Adaptive KL-based Transform: Algorithms and Applications. ·         Automatic Estimation for Parameters of Image Projective Transforms Based on Object-invariant Cores. ·         A Way of Energy Analysis for Image and Video Sequence Processing. ·         Optimal Measurement of Visual Motion Across Spatial and Temporal Scales. ·         Scene Analysis Using Morphological Mathematics and Fuzzy Logic. ·         Digital Video Stabilization in Static and Dynamic Scenes. ·         Implementation of Hadamard Matrices for Image Processing. ·         A Generalized Criterion ...

  11. Mechatronic assistant system for dental drill handling. (United States)

    Ortiz Simon, Jose Luis; Martinez, Arturo Minor; Espinoza, Daniel Lorias; Romero Velazquez, Jose Guadalupe


    Holding a dental tool for many hours of work is reflected in fatigue and manual tremor, which causes bad handling of rotatory instruments and consequently injuries within the buccal cavity. At present there exists no system to help the medical dentist in the support and handling of the dental drill. We propose the use of a mechatronic system to help the odontologist in handling the dental drill. The mechatronic system consists of an articulated arm with force sensors and actuators that are activated electronically. The mechanism was developed so that the handpiece is held simultaneously by the mechatronic arm and the hand of the dentist. Expert dentists and odontology students were asked to execute tasks to assess positioning accuracy and system resolution. Students performed positioning tasks to evaluate adaptation to the system. The subjects drew the contour of a circle with and without the mechatronic assistant to assess positioning accuracy. Similarly, they made cavities on acrylic typodonts to evaluate resolution and accuracy. Adaptation to the system was evaluated by inserting the drill burr into cavities previously made. The mechatronic system provides support and stability while handling the dental drill. The threshold of force required to move the mechanism prevents involuntary movements affecting the quality of work made on cavities. Positioning accuracy was improved by 53% (p arm allows the dentist to manipulate the tool with smooth and precise movements during the preparation of dental cavities with the application of force. The mechatronic system minimizes manual tremor due to fatigue and reduces the risk of iatrogenic dental injuries. Copyright © 2010 John Wiley & Sons, Ltd.


    Jia, Di; Li, Yanlin; Wang, Guoliang; Gao, Huanyu; Yu, Yang


    To conclude the revision reason of unicompartmental knee arthroplasty (UKA) using computer-assisted technology so as to provide reference for reducing the revision incidence and improving the level of surgical technique and rehabilitation. The relevant literature on analyzing revision reason of UKA using computer-assisted technology in recent years was extensively reviewed. The revision reasons by computer-assisted technology are fracture of the medial tibial plateau, progressive osteoarthritis of reserved compartment, dislocation of mobile bearing, prosthesis loosening, polyethylene wear, and unexplained persistent pain. Computer-assisted technology can be used to analyze the revision reason of UKA and guide the best operating method and rehabilitation scheme by simulating the operative process and knee joint activities.

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

    NARCIS (Netherlands)

    Kremenska, Anelly


    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,

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

    NARCIS (Netherlands)

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


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

  15. Effect of Tutorial Mode of Computer-Assisted Instruction on Students ...

    African Journals Online (AJOL)

    Effect of Tutorial Mode of Computer-Assisted Instruction on Students' Academic Performance in Secondary School Practical Geography in Nigeria. ... If you would like more information about how to print, save, and work with PDFs, Highwire ...

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

    NARCIS (Netherlands)

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


    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

  17. Trusted computing for embedded systems

    CERN Document Server

    Soudris, Dimitrios; Anagnostopoulos, Iraklis


    This book describes the state-of-the-art in trusted computing for embedded systems. It shows how a variety of security and trusted computing problems are addressed currently and what solutions are expected to emerge in the coming years. The discussion focuses on attacks aimed at hardware and software for embedded systems, and the authors describe specific solutions to create security features. Case studies are used to present new techniques designed as industrial security solutions. Coverage includes development of tamper resistant hardware and firmware mechanisms for lightweight embedded devices, as well as those serving as security anchors for embedded platforms required by applications such as smart power grids, smart networked and home appliances, environmental and infrastructure sensor networks, etc. ·         Enables readers to address a variety of security threats to embedded hardware and software; ·         Describes design of secure wireless sensor networks, to address secure authen...

  18. Computer systems and software engineering (United States)

    Mckay, Charles W.


    The High Technologies Laboratory (HTL) was established in the fall of 1982 at the University of Houston Clear Lake. Research conducted at the High Tech Lab is focused upon computer systems and software engineering. There is a strong emphasis on the interrelationship of these areas of technology and the United States' space program. In Jan. of 1987, NASA Headquarters announced the formation of its first research center dedicated to software engineering. Operated by the High Tech Lab, the Software Engineering Research Center (SERC) was formed at the University of Houston Clear Lake. The High Tech Lab/Software Engineering Research Center promotes cooperative research among government, industry, and academia to advance the edge-of-knowledge and the state-of-the-practice in key topics of computer systems and software engineering which are critical to NASA. The center also recommends appropriate actions, guidelines, standards, and policies to NASA in matters pertinent to the center's research. Results of the research conducted at the High Tech Lab/Software Engineering Research Center have given direction to many decisions made by NASA concerning the Space Station Program.

  19. Adaptive Computer-Assisted Mammography Training for Improved Breast Cancer Screening (United States)


    detection in mammography ." Medical Physics 31: 958. Timp, S., N. Karssemeijer and J. Hendriks (2003). Analysis of changes in masses using contrast and...Award Number: W81XWH-11-1-0755 TITLE: Adaptive Computer-Assisted Mammography Training for Improved Breast Cancer Screening PRINCIPAL...14Dec2014 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER W81XWH-11-1-0755 Adaptive Computer-Assisted Mammography Training for Improved Breast Cancer

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

    Directory of Open Access Journals (Sweden)

    Angelos Skodras

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

  1. 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 (United States)

    Karakis, Hilal; Karamete, Aysen; Okçu, Aydin


    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…

  2. Metocognitive Support Accelerates Computer Assisted Learning for Novice Programmers (United States)

    Rum, Siti Nurulain Mohd; Ismail, Maizatul Akmar


    Computer programming is a part of the curriculum in computer science education, and high drop rates for this subject are a universal problem. Development of metacognitive skills, including the conceptual framework provided by socio-cognitive theories that afford reflective thinking, such as actively monitoring, evaluating, and modifying one's…

  3. Using Computer-Assisted Assessment Heuristics for Usability Evaluations (United States)

    Sim, Gavin; Read, Janet C.


    Teaching practices within educational institutions have evolved through the increased adoption of technology to deliver the curriculum and the use of computers for assessment purposes. For educational technologists, there is a vast array of commercial computer applications available for the delivery of objective tests, and in some instances,…

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

    Directory of Open Access Journals (Sweden)

    Stockmans Filip


    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

  5. [A computer-assisted workplace for anatomical pathology investigations on human embryos]. (United States)

    Fahr, M S; Müller, A M; Müntefering, H; Coerdt, W


    Contrary to chromosomal aberrations, which can be recognized by cytogenetic procedures alone, monogenic inherited diseases are determined exclusively by evidence from anatomical-pathological investigations. We present a computer-assisted optical system providing not only efficient dissections of embryos, but also diagnosis of congenital defects, such as congenital heart deformities, neural tube defects and skeletal malformations. A stereomicroscope with an integrated camera as well as two cold light sources creates a three-dimensional image of the human embryo (size: e.g., 2.5 mm=23.-25.d), hence facilitating handling of the autopsy. Scenes of interest are photodocumented by a multifocusing camera. Its technique is based on serial pictures of predefined levels of the embryo, consecutively adding up to one photograph with minimized areas out of focus. The sequences, the rapid as well as exact calibration of the screened objects and digital archiving of the obtained photographs allow efficient diagnostic procedures. As the depth of field is broadened, the computer-assisted workplace improves the diagnosis as well as documentation, providing a base for genetic counseling.

  6. Computer assisted surgery. Its usefulness in different levels of pre-operative deformities. (United States)

    Benavente, P; López Orosa, C; Oteo Maldonado, J A; Orois Codesal, A; García Lázaro, F J


    To compare the results obtained with computer assisted surgery with conventional techniques and evaluate the influence of navigation at different levels of preoperative deformity. A retrospective study was conducted on 100 cases with primary total knee arthroplasty performed with conventional or computer assisted surgery. A comparison was made of the post-operative mechanical axis of the lower limb between both groups and in terms of pre-operative deformity. Optimal alignment is most often obtained by using the navigation system (62%) than by a conventional technique (36%). Patients with deformities under 10° varus showed a mean post-operative alignment within the optimal range (0±3° deviation from the neutral mechanical axis), while those with more than 15° of varus show an alignment out of range, regardless of the technique used (p=.002). In those with a deformity of between 10 and 15° of pre-operative varus alignment, values were found closer to the neutral axis in the navigation group (178.7°) than in the conventional technique (175.5°), although these differences are not statistically significant (p=.127). Post-operative alignment obtained with navigation is better than with the conventional technique, with a smaller percentage of cases out of range, and greater accuracy in placing implants. A potential benefit was observed in navigation for cases with deformities of between 10 and 15° of varus. Copyright © 2014 SECOT. Published by Elsevier Espana. All rights reserved.

  7. Health technology assessment of computer-assisted pap test screening in Italy. (United States)

    Dalla Palma, Paolo; Moresco, Luca; Giorgi Rossi, Paolo


    To assess the introduction of computer-assisted Pap test screening in cervical cancer screening. Various scenarios are considered: conventional and liquid-based cytology (LBC) slides, fully automatic instrumentation (Becton Dickinson FocalPoint™ Slide Profiler and Hologic ThinPrep® Imaging System), and semiautomatic scanner (Hologic Integrated Imager I-Squared). A working group was formed that included researchers from the largest centers already using instrumentation. A questionnaire on laboratory management and on social/ethical issues and annual workload was proposed. Prices for the technology were obtained directly from the producers; costs were calculated from observed and literature data. The scope of the report and final draft were submitted to a consulting committee of stakeholders. The break-even point was found to be 49,000 cases/year, if conventional slides were used, while it was near the theoretical maximum capacity, 70,000 cases/year, with LBC slides. Efficiency increased with the volume of slides. Screening time decreased by two thirds for conventional slides and by less than half for LBC slides. Acceptance of the instrumentation by the users was good. Computer-assisted screening may increase productivity even if in most situations it will mean additional costs. Furthermore, primary screening with human papillomavirus tests will drastically reduce the need for Pap test reading. Copyright © 2013 S. Karger AG, Basel.

  8. Total knee arthroplasty with computer-assisted navigation: an analysis of 200 cases,

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Malheiros Luzo


    Full Text Available OBJECTIVE: to evaluate the results from surgery with computer-assisted navigation in cases of total knee arthroplasty.METHOD: a total of 196 patients who underwent total knee arthroplasty with computer-assisted navigation were evaluated. The extension and flexion spaces (gaps were evaluated during the operation and the alignment after the operation was assessed. The Knee Society Score (KSS questionnaire for assessing patient's function was applied preoperatively and postoperatively after a mean follow-up of 22 months.RESULTS: in all, 86.7% of the patients presented good alignment of the mechanical axis (less than 3◦ of varus or valgus in relation to the mechanical axis and 96.4% of the patients presented balanced flexion and extension gaps. Before the operation, 97% of the patients presented poor or insufficient KSS, but after the operation, 77.6% presented good or excellent KSS.CONCLUSION: the navigation system made it possible to achieve aligned and balanced implants, with notable functional improvement among the patients. It was found to be useful in assessing, understanding and improving knowledge in relation to performing arthroplasty procedures.

  9. Computer-assisted and fractal-based morphometric assessment of microvascularity in histological specimens of gliomas (United States)

    Di Ieva, Antonio; Bruner, Emiliano; Widhalm, Georg; Minchev, Georgi; Tschabitscher, Manfred; Grizzi, Fabio


    Fractal analysis is widely applied to investigate the vascular system in physiological as well as pathological states. We propose and examine a computer-aided and fractal-based image analysis technique to quantify the microvascularity in histological specimens of WHO grade II and III gliomas. A computer-aided and fractal-based analysis was used to describe the microvessels and to quantify their geometrical complexity in histological specimens collected from 17 patients. The statistical analysis showed that the fractal-based indexes are the most discriminant parameters to describe the microvessels. The computer-aided quantitative analysis also showed that grade III gliomas are generally more vascularized than grade II gliomas. The fractal parameters are reliable quantitative indicators of the neoplastic microvasculature, making them potential surrogate biomarkers. The qualitative evaluation currently performed by the neuropathologist can be combined with the computer-assisted quantitative analysis of the microvascularity to improve the diagnosis and optimize the treatment of patients with brain cancer. PMID:22645645


    Directory of Open Access Journals (Sweden)

    Naohisa HASHIMOTO


    Full Text Available This paper proposes a new concept of elderly driver assistance systems, which performs the assistance by cooperative driving between two vehicles, and describes some experiments with elderly drivers. The assistance consists of one vehicle driven by an elderly driver called a guest vehicle and the other driven by a assisting driver called a host vehicle, and the host vehicle assists or escorts the guest vehicle through the inter-vehicle communications. The functions of the systems installed on a single-seat electric vehicle are highly evaluated by subjects of elderly drivers in virtual streets on a test track.

  11. Computer Assisted Surgery and Current Trends in Orthopaedics Research and Total Joint Replacements (United States)

    Amirouche, Farid


    patients are living longer and total hip arthroplasty is performed in younger patients the risks of osteolysis associated with cumulative wear is increased. Computer-assisted surgery is based on sensing feedback; vision and imaging that help surgeons align the patient's joints during total knee or hip replacement with a degree of accuracy not possible with the naked eye. For the first time, the computer feedback is essential for ligament balancing and longevity of the implants. The computers navigation systems also help surgeons to use smaller incisions instead of the traditional larger openings. Small-incision surgery offers the potential for faster recovery, less bleeding and less pain for patients. The development of SESCAN imaging technique to create a patient based model of a 3D joint will be presented to show the effective solution of complex geometry of joints.

  12. Computer-assisted versus oral-and-written dietary history taking for diabetes mellitus. (United States)

    Wei, Igor; Pappas, Yannis; Car, Josip; Sheikh, Aziz; Majeed, Azeem


    Diabetes is a chronic illness characterised by insulin resistance or deficiency, resulting in elevated glycosylated haemoglobin A1c (HbA1c) levels. Diet and adherence to dietary advice is associated with lower HbA1c levels and control of disease. Dietary history may be an effective clinical tool for diabetes management and has traditionally been taken by oral-and-written methods, although it can also be collected using computer-assisted history taking systems (CAHTS). Although CAHTS were first described in the 1960s, there remains uncertainty about the impact of these methods on dietary history collection, clinical care and patient outcomes such as quality of life.  To assess the effects of computer-assisted versus oral-and-written dietary history taking on patient outcomes for diabetes mellitus. We searched The Cochrane Library (issue 6, 2011), MEDLINE (January 1985 to June 2011), EMBASE (January 1980 to June 2011) and CINAHL (January 1981 to June 2011). Reference lists of obtained articles were also pursued further and no limits were imposed on languages and publication status. Randomised controlled trials of computer-assisted versus oral-and-written history taking in patients with diabetes mellitus. Two authors independently scanned the title and abstract of retrieved articles. Potentially relevant articles were investigated as full text. Studies that met the inclusion criteria were abstracted for relevant population and intervention characteristics with any disagreements resolved by discussion, or by a third party. Risk of bias was similarly assessed independently. Of the 2991 studies retrieved, only one study with 38 study participants compared the two methods of history taking over a total of eight weeks. The authors found that as patients became increasingly familiar with using CAHTS, the correlation between patients' food records and computer assessments improved. Reported fat intake decreased in the control group and increased when queried by the computer

  13. [Clinical analysis of 12 cases of orthognathic surgery with digital computer-assisted technique]. (United States)

    Tan, Xin-ying; Hu, Min; Liu, Chang-kui; Liu, Hua-wei; Liu, San-xia; Tao, Ye


    This study was to investigate the effect of the digital computer-assisted technique in orthognathic surgery. Twelve patients from January 2008 to December 2011 with jaw malformation were treated in our department. With the help of CT and three-dimensional reconstruction technique, 12 patients underwent surgical treatment and the results were evaluated after surgery. Digital computer-assisted technique could clearly show the status of the jaw deformity and assist virtual surgery. After surgery all patients were satisfied with the results. Digital orthognathic surgery can improve the predictability of the surgical procedure, and to facilitate patients' communication, shorten operative time, and reduce patients' pain.


    Directory of Open Access Journals (Sweden)

    Mr. Evgeniy E. Levitskii


    Full Text Available The article considers the importance of creating robot-assisted system, namely of a manipulating robot, for object osteosynthesis. The article also considers classifications of robot-assisted systems used in foreign countries. The authors describe 3D model of human femoral bone, necessity of its creating and analyzing for further simulation of robot-assisted system mechanical part with hydraulic drive.

  15. Low-cost monitoring of patients during unsupervised robot/computer assisted motivating stroke rehabilitation. (United States)

    Johnson, Michelle J; Shakya, Yuniya; Strachota, Elaine; Ahamed, Sheikh Iqbal


    There is a need for effective stroke rehabilitation systems that can be used in undersupervised/unsupervised environments such as the home to assist in improving and/or sustaining functional outcomes. We determined the stability, accuracy and usability of an extremely low-cost mobile robot for use with a robot/computer motivating rehabilitation device, TheraDrive. The robot provided cues to discourage excessive trunk movements and to encourage arm movements. The mobile robot system was positively received by potential users, and it was accurate and stable over time. Feedback from users suggests that finding the optimal frequency and type of encouragement and corrective feedback given by the robot helper will be critical for long-term acceptance.

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

    Directory of Open Access Journals (Sweden)

    Bruno Buchberger


    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. 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.

  17. Assistance System for Traffic Signs Inventory

    Directory of Open Access Journals (Sweden)

    Karel Zídek


    Full Text Available We can see arising trend in the automotive industry in last years – autonomous cars that are driven just by on-board computers. The traffic signs tracking system must deal with real conditions with data that are frequently obtained in poor light conditions, fog, heavy rain or are otherwise disturbed. Completely same problem is solved by mapping companies that are producing geospatial data for different information systems, navigations, etc. They are frequently using cars equipped with a wide range of measuring instruments including panoramic cameras. These measurements are frequently done during early morning hours when the traffic conditions are acceptable. However, in this time, the sun position is usually not optimal for the photography. Most of the traffic signs and other street objects are heavily underexposed. Hence, it is difficult to find an automatic approach that can identify them reliably. In this article, we focus on methods designed to deal with the described conditions. An overview of the state-of-the-art methods is outlined. Further, where it is possible, we outline an implementation of the described methods using well-known Open Computer Vision library. Finally, emphasis is placed on the methods that can deal with low light conditions, fog or other situations that complicate the detection process.

  18. Elastic Cloud Computing Architecture and System for Heterogeneous Spatiotemporal Computing (United States)

    Shi, X.


    Spatiotemporal computation implements a variety of different algorithms. When big data are involved, desktop computer or standalone application may not be able to complete the computation task due to limited memory and computing power. Now that a variety of hardware accelerators and computing platforms are available to improve the performance of geocomputation, different algorithms may have different behavior on different computing infrastructure and platforms. Some are perfect for implementation on a cluster of graphics processing units (GPUs), while GPUs may not be useful on certain kind of spatiotemporal computation. This is the same situation in utilizing a cluster of Intel's many-integrated-core (MIC) or Xeon Phi, as well as Hadoop or Spark platforms, to handle big spatiotemporal data. Furthermore, considering the energy efficiency requirement in general computation, Field Programmable Gate Array (FPGA) may be a better solution for better energy efficiency when the performance of computation could be similar or better than GPUs and MICs. It is expected that an elastic cloud computing architecture and system that integrates all of GPUs, MICs, and FPGAs could be developed and deployed to support spatiotemporal computing over heterogeneous data types and computational problems.

  19. Foreign Assistance Coordination and Tracking System (FACTS Info) (United States)

    US Agency for International Development — Foreign assistance planning and reporting system for USAID and Department of State (DOS); supports both reporting needs and transactional budget planning and...

  20. Computer system reliability safety and usability

    CERN Document Server

    Dhillon, BS


    Computer systems have become an important element of the world economy, with billions of dollars spent each year on development, manufacture, operation, and maintenance. Combining coverage of computer system reliability, safety, usability, and other related topics into a single volume, Computer System Reliability: Safety and Usability eliminates the need to consult many different and diverse sources in the hunt for the information required to design better computer systems.After presenting introductory aspects of computer system reliability such as safety, usability-related facts and figures,

  1. Splint deformation measurement: a contribution to quality control in computer assisted surgery (United States)

    Weber, Christoph; Figl, Michael; Schicho, Kurt


    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.

  2. Learning theories in computer-assisted foreign language acquisition


    Baeva, D.


    This paper reviews the learning theories, focusing to the strong interest in technology use for language learning. It is important to look at how technology has been used in the field thus far. The goals of this review are to understand how computers have been used in the past years to support foreign language learning, and to explore any research evidence with regards to how computer technology can enhance language skills acquisition

  3. Integrated Computer System of Management in Logistics (United States)

    Chwesiuk, Krzysztof


    This paper aims at presenting a concept of an integrated computer system of management in logistics, particularly in supply and distribution chains. Consequently, the paper includes the basic idea of the concept of computer-based management in logistics and components of the system, such as CAM and CIM systems in production processes, and management systems for storage, materials flow, and for managing transport, forwarding and logistics companies. The platform which integrates computer-aided management systems is that of electronic data interchange.

  4. On the Universal Computing Power of Amorphous Computing Systems

    Czech Academy of Sciences Publication Activity Database

    Wiedermann, Jiří; Petrů, L.


    Roč. 45, č. 4 (2009), s. 995-1010 ISSN 1432-4350 R&D Projects: GA AV ČR 1ET100300517; GA ČR GD201/05/H014 Institutional research plan: CEZ:AV0Z10300504 Keywords : amorphous computing systems * universal computing * random access machine * simulation Subject RIV: IN - Informatics, Computer Science Impact factor: 0.726, year: 2009

  5. The Instructional Effectiveness of Three Levels of Graphics Displays for Computer-Assisted Instruction. (United States)

    Moore, Martha V.; And Others

    This study compares the effectiveness of three types of computer graphics display for computer-assisted instruction in (1) low level (boxed alphanumerics and schematics), (2) medium level (line drawings), and (3) high level (line drawings plus animations). Three groups of 30 enlisted personnel at the Engineering School and the Defense Mapping…

  6. The Potential of Older Adults for Response to Computer-Assisted Instruction. (United States)

    Flynn, Marilyn L.


    Describes study that examined the general patterns of computer use and response to computer-assisted instruction by older adults age 45 to 70 in programs for jobless men and women to learn skills for labor market re-entry. Socioeconomic characteristics are examined, and the instructor's role in determining student attitudes is explored. (23…

  7. Algerian EFL University Teachers' Attitudes towards Computer Assisted Language Learning: The Case of Djilali Liabes University (United States)

    Bouchefra, Miloud; Baghoussi, Meriem


    Computer Assisted Language Learning (CALL) is still groping its way into Algerian English as a Foreign Language (EFL) classroom, where Information Communications Technologies (ICTs) are defined in terms of occasional use of computers and data projectors for material presentation in the classroom. Though major issues in the image of the lack of…

  8. Computer-Assisted Mathematics Instruction for Students with Specific Learning Disability: A Review of the Literature (United States)

    Stultz, Sherry L.


    This review was conducted to evaluate the current body of scholarly research regarding the use of computer-assisted instruction (CAI) to teach mathematics to students with specific learning disability (SLD). For many years, computers are utilized for educational purposes. However, the effectiveness of CAI for teaching mathematics to this specific…

  9. Effects of Using Simultaneous Prompting and Computer-Assisted Instruction during Small Group Instruction (United States)

    Ozen, Arzu; Ergenekon, Yasemin; Ulke-Kurkcuoglu, Burcu


    The current study investigated the relation between simultaneous prompting (SP), computer-assisted instruction (CAI), and the receptive identification of target pictures (presented on laptop computer) for four preschool students with developmental disabilities. The students' acquisition of nontarget information through observational learning also…

  10. A Computer-Assisted Instruction in Teaching Abstract Statistics to Public Affairs Undergraduates (United States)

    Ozturk, Ali Osman


    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…

  11. Efficiency of Computer Assisted Cooperative Learning Method on Students' Performance in Using Colors (United States)

    Dikici, Ayhan


    In this study, the effects of computer assisted cooperative learning method on students' performance of using colours in art education were examined. 15 students at the ages between 12 and 15 who owned a personal computer and had access to the internet were selected to form the experimental group. 35 students at the same time age and education…

  12. Conflict Resolution in Computer Systems

    Directory of Open Access Journals (Sweden)

    G. P. Mojarov


    Full Text Available A conflict situation in computer systems CS is the phenomenon arising when the processes have multi-access to the shared resources and none of the involved processes can proceed because of their waiting for the certain resources locked by the other processes which, in turn, are in a similar position. The conflict situation is also called a deadlock that has quite clear impact on the CS state.To find the reduced to practice algorithms to resolve the impasses is of significant applied importance for ensuring information security of computing process and thereupon the presented article is aimed at solving a relevant problem.The gravity of situation depends on the types of processes in a deadlock, types of used resources, number of processes, and a lot of other factors.A disadvantage of the method for preventing the impasses used in many modern operating systems and based on the preliminary planning resources required for the process is obvious - waiting time can be overlong. The preventing method with the process interruption and deallocation of its resources is very specific and a little effective, when there is a set of the polytypic resources requested dynamically. The drawback of another method, to prevent a deadlock by ordering resources, consists in restriction of possible sequences of resource requests.A different way of "struggle" against deadlocks is a prevention of impasses. In the future a prediction of appearing impasses is supposed. There are known methods [1,4,5] to define and prevent conditions under which deadlocks may occur. Thus the preliminary information on what resources a running process can request is used. Before allocating a free resource to the process, a test for a state “safety” condition is provided. The state is "safe" if in the future impasses cannot occur as a result of resource allocation to the process. Otherwise the state is considered to be " hazardous ", and resource allocation is postponed. The obvious

  13. Computer-assisted language learning in reading comprehension by using visual mnemonics A case study of Iranian EFL learners

    Directory of Open Access Journals (Sweden)

    Mojtaba Aghajani


    Full Text Available A profitable method to address reading delays is to use computer-assisted learning, but these techniques are not always effective. In this research, the researchers evaluated a commercially available computer system, which uses visual mnemonics, in a randomised controlled trial with 78 English-speaking children (mean age 7 years who their schools identified as needing reading support.  School based individual tutorials usually took place 2-3 times/week.  Only the experimental group received the intervention in the first 10 months, thereafter both the experimental and control groups received the intervention for 6 months. After 10 months, the experimental group had significantly higher standardised scores than the waiting list control group of decoding, phonological awareness, naming speed, phonological short-term memory and executive loaded working memory. The computer-assisted intervention was effective and this suggests that this medium can be used for reading interventions with English speaking children.

  14. EndoCAS navigator platform: a common platform for computer and robotic assistance in minimally invasive surgery. (United States)

    Megali, Giuseppe; Ferrari, Vincenzo; Freschi, Cinzia; Morabito, Bruno; Cavallo, Filippo; Turini, Giuseppe; Troia, Elena; Cappelli, Carla; Pietrabissa, Andrea; Tonet, Oliver; Cuschieri, Alfred; Dario, Paolo; Mosca, Franco


    Computer-assisted surgery (CAS) systems are currently used in only a few surgical specialties: ear, nose and throat (ENT), neurosurgery and orthopaedics. Almost all of these systems have been developed as dedicated platforms and work on rigid anatomical structures. The development of augmented reality systems for intra-abdominal organs remains problematic because of the anatomical complexity of the human peritoneal cavity and especially because of the deformability of its organs. The aim of the present work was to develop and implement a highly modular platform (targeted for minimally invasive laparoscopic surgery) generally suitable for CAS, and to produce a prototype for demonstration of its potential clinical application and use in laparoscopic surgery. In this paper we outline details of a platform integrating several aspects of CAS and medical robotics into a modular open architecture: the EndoCAS navigator platform, which integrates all the functionalities necessary for provision of computer-based assistance to surgeons during all the management phases (diagnostic work-up, planning and intervention). A specific application for computer-assisted laparoscopic procedures has been developed on the basic modules of the platform. The system provides capabilities for three-dimensional (3D) surface model generation, 3D visualization, intra-operative registration, surgical guidance and robotic assistance during laparoscopic surgery. The description of specific modules and an account of the initial clinical experience with the system are reported. We developed a common platform for computer assisted surgery and implemented a system for intraoperative laparoscopic navigation. The preliminary clinical trials and feedback from the surgeons on its use in laparoscopic surgery have been positive, although experience has been limited to date. We have successfully developed a system for computer-assisted technologies for use in laparoscopic surgery and demonstrated, by early

  15. Know Your Personal Computer The Personal Computer System ...

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 1; Issue 4. Know Your Personal Computer The Personal Computer System Software. Siddhartha Kumar Ghoshal. Series Article Volume 1 Issue 4 April 1996 pp 31-36. Fulltext. Click here to view fulltext PDF. Permanent link:


    Directory of Open Access Journals (Sweden)

    Mariana FAUR


    Full Text Available The computer-assisted instruction play an increasingly important role in providing enhancement to instruction. The purpose of this study was to evaluate the effectiveness of computer assisted instruction in Biology lessons. In this study we compared the differences in retention of information by pupils using the two different instructional modes, CAI or written text. Initial results of the study indicated that pupils in treatment classes with the computer-assisted instruction, and in control classes, all made important gains in knowledge. Further research may be needed to determine whether the students' improved learning performance could be attributed to the use of the computer or to the restructuring of the conventional lesson with interesting informations.

  17. PGAAS: a prokaryotic genome assembly assistant system. (United States)

    Yu, Zhou; Li, Tao; Zhao, Jindong; Luo, Jingchu


    In order to accelerate the finishing phase of genome assembly, especially for the whole genome shotgun approach of prokaryotic species, we have developed a software package designated prokaryotic genome assembly assistant system (PGAAS). The approach upon which PGAAS is based is to confirm the order of contigs and fill gaps between contigs through peptide links obtained by searching each contig end with BLASTX against protein databases. We used the contig dataset of the cyanobacterium Synechococcus sp. strain PCC7002 (PCC7002), which was sequenced with six-fold coverage and assembled using the Phrap package. The subject database is the protein database of the cyanobacterium, Synechocystis sp. strain PCC6803 (PCC6803). We found more than 100 non-redundant peptide segments which can link at least 2 contigs. We tested one pair of linked contigs by sequencing and obtained satisfactory result. PGAAS provides a graphic user interface to show the bridge peptides and pier contigs. We integrated Primer3 into our package to design PCR primers at the adjacent ends of the pier contigs. We tested PGAAS on a Linux (Redhat 6.2) PC machine. It is developed with free software (MySQL, PHP and Apache). The whole package is distributed freely and can be downloaded as UNIX compress file: The package is being continually updated.

  18. [Clinical efficiency of computer-assisted pedicle screw placement versus conventional method: a meta-analysis]. (United States)

    Xing, Dan; Ma, Xin-Long; Song, Dong-Hui; Ma, Jian-Xiong; Xu, Wei-Guo; Wang, Jie; Yang, Yang; Chen, Yang


    To compare the clinical efficacy of computer-assisted pedicle screw placement and conventional placement in the treatment of spinal disease. A systematic search of studies published between Jan. 1990 and Feb. 2012 was conducted using Medline, Embase, OVID, ScienceDirect and Cochrane Review databases. Randomized controlled trials (RCTs) and prospective controlled trials of comparing computer-assisted pedicle screw placement to conventional method performed at one center or multi-centers providing data on accuracy of placement and clinical effects were identified. Two study authors independently reviewed the 93 articles originally identified and selected 10 for analysis. Study title,demographic characteristics,number of pedicle screw,anatomical area and outcomes were extracted manually from all selected studies. RevMan 5.1 software was used for meta-analysis. Ten studies encompassing 2813 pedicle screws met the inclusion criteria. Overall,the result of meta-analysis indicated that there were significant differences between two groups in accuracy in placement of pedicle screw [OR = 2.58, 95% CI (1.18, 5.63)], insertion time [WMD = -2.15, 95% CI (-2.36, -1.94)]. However, there was only one study reported preparation time of pedicle screw of navigation group was longer than conventional group. No neurological complication in navigation group was reported. As a safety supplementary measure, computer navigation provide better accuracy in placement of pedicle screw and insertion time. The preparation time of pedicle screw may prolong due to the complexity of navigation system. Further reseach should include randomized controlled trials with well-planned methodology to limit bias.

  19. Development and Evaluation of Computer-Aided Music-Learning System for the Hearing Impaired (United States)

    Yang, H.-J.; Lay, Y.-L.; Liou, Y.-C.; Tsao, W.-Y.; Lin, C.-K.


    A computer-assisted music-learning system (CAMLS) has been developed to help the hearing impaired practice playing a musical melody. The music-learning performance is evaluated to test the usability of the system. This system can be a computer-supported learning tool for the hearing impaired to help them understand what pitch and tempo are, and…

  20. Gas emergency management - safety and reliability of supply - remote management of distribution system through computer assisted dispatching of emergency events; Gestion des urgences - securite et fiabilite de la distribution du gaz gestion des urgences a l'aide d'un systeme informatique integre

    Energy Technology Data Exchange (ETDEWEB)

    Bettin, B.; Clava, R.; Pisino, F. [italgas, Torino (Italy); Guerra, M. [A.M.G.A., (Italy)


    Gas distribution companies have long since paid great attention to improving the quality and safety of the gas supply service to the consumer. In particular the management of gas emergencies has always been a responsibility taken seriously by all sectors of the gas industry. Over the last few years, however, the concept and practices in risk management have been changing rapidly. This has involved gas companies in an on-going attempt to successfully define and establish clear computer assisted risk management practices. Risk management is the systematic use of management policy, procedures and means, with the aim to protect employees, the public, the environment and properties at an acceptable cost. This paper has the purpose of presenting: - the computer software of gas emergency management in use at Italgas S.p.A. for testing the performance of gas distribution networks on a 'real-time' basis and therefore selecting effective action for solving any emergency that may occur; - the integrated system, implemented by A.M.G.A. (Azienda Mediterranea Gas e Acqua S.p.A. - Genova), for real-time management of gas and water network emergencies (reported by customers or by tele-alarm systems), their location, and the dispatching of operative crews. (authors)

  1. LHCb Conditions Database Operation Assistance Systems

    CERN Multimedia

    Shapoval, Illya


    The Conditions Database of the LHCb experiment (CondDB) provides versioned, time dependent geometry and conditions data for all LHCb data processing applications (simulation, high level trigger, reconstruction, analysis) in a heterogeneous computing environment ranging from user laptops to the HLT farm and the Grid. These different use cases impose front-end support for multiple database technologies (Oracle and SQLite are used). Sophisticated distribution tools are required to ensure timely and robust delivery of updates to all environments. The content of the database has to be managed to ensure that updates are internally consistent and externally compatible with multiple versions of the physics application software. In this paper we describe three systems that we have developed to address these issues: - an extension to the automatic content validation done by the “Oracle Streams” replication technology, to trap cases when the replication was unsuccessful; - an automated distribution process for the S...

  2. Cognitive assisted living ambient system: a survey

    Directory of Open Access Journals (Sweden)

    Ruijiao Li


    Full Text Available The demographic change towards an aging population is creating a significant impact and introducing drastic challenges to our society. We therefore need to find ways to assist older people to stay independently and prevent social isolation of these population. Information and Communication Technologies (ICT provide various solutions to help older adults to improve their quality of life, stay healthier, and live independently for a time. Ambient Assisted Living (AAL is a field to investigate innovative technologies to provide assistance as well as healthcare and rehabilitation to impaired seniors. The paper provides a review of research background and technologies of AAL.

  3. Health literacy and computer-assisted instruction: usability and patient preference. (United States)

    Duren-Winfield, Vanessa; Onsomu, Elijah O; Case, Douglas L; Pignone, Michael; Miller, David


    The authors investigated the feasibility of using computer-assisted instruction in patients of varying literacy levels by examining patients' preferences for learning and their ability to use 2 computer-based educational programs. A total of 263 participants 50-74 years of age with varying health literacy levels interacted with 1 of 2 educational computer programs as part of a randomized trial of a colorectal cancer screening decision aid. A baseline and postprogram evaluation survey were completed. More than half (56%) of the participants had limited health literacy. Regardless of literacy level, doctors were the most commonly used source of medical information-used frequently by 85% of limited and adequate literacy patients. In multivariate logistic regression, only those with health insurance (OR = 2.35, p = .06) and computer use experience (OR = 0.39, p = .03) predicted the ability to complete the programs without assistance compared with those without health insurance or prior computer use, respectively. Although patients with limited health literacy had less computer experience, the majority completed the programs without any assistance and stated that they learned more than they would have from a brochure. Future research should investigate ways that computer-assisted instruction can be incorporated in medical care to enhance patient understanding.

  4. Text processing for technical reports (direct computer-assisted origination, editing, and output of text)

    Energy Technology Data Exchange (ETDEWEB)

    De Volpi, A.; Fenrick, M. R.; Stanford, G. S.; Fink, C. L.; Rhodes, E. A.


    Documentation often is a primary residual of research and development. Because of this important role and because of the large amount of time consumed in generating technical reports, particularly those containing formulas and graphics, an existing data-processing computer system has been adapted so as to provide text-processing of technical documents. Emphasis has been on accuracy, turnaround time, and time savings for staff and secretaries, for the types of reports normally produced in the reactor development program. The computer-assisted text-processing system, called TXT, has been implemented to benefit primarily the originator of technical reports. The system is of particular value to professional staff, such as scientists and engineers, who have responsibility for generating much correspondence or lengthy, complex reports or manuscripts - especially if prompt turnaround and high accuracy are required. It can produce text that contains special Greek or mathematical symbols. Written in FORTRAN and MACRO, the program TXT operates on a PDP-11 minicomputer under the RSX-11M multitask multiuser monitor. Peripheral hardware includes videoterminals, electrostatic printers, and magnetic disks. Either data- or word-processing tasks may be performed at the terminals. The repertoire of operations has been restricted so as to minimize user training and memory burden. Spectarial staff may be readily trained to make corrections from annotated copy. Some examples of camera-ready copy are provided.

  5. Optimizing conditions for computer-assisted anatomical learning.

    NARCIS (Netherlands)

    Luursema, J.M.; Verwey, Willem B.; Kommers, Petrus A.M.; Geelkerken, Robert H.; Vos, Hendrik J.


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

  6. New Directions and Issues in Computer-Assisted Instruction. (United States)

    Bhatia, Tej K.

    This paper examines several theoretical and empirical issues, together with new directions in thinking, which have emerged as the result of significant research done on the PLATO IV computer and with the advancement of the language pedogogical theory. CAI previously encountered three basic problems: (1) the cost of hardware, (2) the lack of…

  7. Computer Assisted Instruction in Special Education Three Case Studies

    Directory of Open Access Journals (Sweden)

    İbrahim DOĞAN


    Full Text Available The purpose of this study is to investigate the computer use of three students attending the special education center. Students have mental retardation, hearing problem and physical handicap respectively. The maximum variation sampling is used to select the type of handicap while the convenience sampling is used to select the participants. Three widely encountered handicap types in special education are chosen to select the study participants. The multiple holistic case study design is used in the study. Results of the study indicate that teachers in special education prefer to use educational games and drill and practice type of computers programs. Also it is found that over use of the animation, text and symbols cause cognitive overload on the student with mental retardation. Additionally, it is also discovered that the student with hearing problem learn words better when the computers are used in education as compared to the traditional method. Furthermore the student with physical handicap improved his fine muscle control abilities besides planned course objectives when computers are used in special education.

  8. Computer-assisted health impact assessment for intersectoral health policy

    NARCIS (Netherlands)

    Mooy, J. M.; Gunning-Schepers, L. J.


    Intersectoral health policy implies negotiations with politicians outside the health sector. Health politicians have a stronger position if they can quantify health impact. In this Dutch case-study we used a computer simulation approach to answer the following questions: Which anti-tobacco

  9. Promoting Technology-Assisted Active Learning in Computer Science Education (United States)

    Gao, Jinzhu; Hargis, Jace


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

  10. [Guideline compliance in the treatment of schizophrenic patients. Introduction of a computer-assisted treatment pathway]. (United States)

    Godemann, F; Blittersdorf, K; Poschenrieder, M; Klimitz, H; Hauth, I; Gutzmann, H


    The goal of S3 Guidelines for the Treatment of Schizophrenia was to improve the care of patients with schizophrenic psychoses. However, the publication of guidelines alone does not ensure their consistent implementation. The use of treatment pathways represents one possible approach to help implement the complex treatment recommendations contained in the S3 Guidelines. The first computer-assisted treatment pathway for patients with schizophrenic psychoses was successfully incorporated into the everyday routine of psychiatric hospitals. The aim of the present study was to systematically analyse the impact of this measure on guideline compliance. Based on the S3 Guidelines for the Treatment of Schizophrenia developed by the German Association of Psychiatry, Psychotherapy and Neurology (Deutsche Gesellschaft für Psychiatrie, Psychotherapie und Nervenheilkunde; DGPPN), diagnostic and treatment procedures were defined by a multiprofessional working group with members from five different hospitals and subsequently incorporated into an existing hospital information system. In one of the five hospitals, the impact of this measure was analysed in a pilot study in a systematic manner. In the year 2007, approximately 100 patients in each of two wards in the hospital received in a parallel group design either standard care or care based on a computer-assisted treatment pathway. Based on their place of residence, patients were assigned to the two units consecutively. Both groups were analysed to determine the extent to which the care they received conformed to treatment guidelines. Data available from the years 2004 and 2005 served as a historical comparison to the present results. The differences in guideline compliance between the two wards were heterogeneous and, in certain respects, counterintuitive. As expected, the treatment pathway group showed an increased number of laboratory tests, more frequent drug screening at hospital admission and more appropriate dosing of

  11. Performance tuning for high performance computing systems


    Pahuja, Himanshu


    A Distributed System is composed by integration between loosely coupled software components and the underlying hardware resources that can be distributed over the standard internet framework. High Performance Computing used to involve utilization of supercomputers which could churn a lot of computing power to process massively complex computational tasks, but is now evolving across distributed systems, thereby having the ability to utilize geographically distributed computing resources. We...

  12. Contributions of Cloud Computing in CRM Systems


    Bobek, Pavel


    This work deals with contributions of cloud computing to CRM. The main objective of this work is evaluation of cloud computing and its contributions to CRM systems and determining demands on cloud solution of CRM for trading company. The first chapter deals with CRM systems characteristics. The second chapter sums up qualities and opportunities of utilization of cloud computing. The third chapter describes demands on CRM systém with utilization of cloud computing for trading company that deal...

  13. A comparison of conventional and computer-assisted semen analysis (CRISMAS software) using samples from 166 young Danish men

    DEFF Research Database (Denmark)

    Vested, Anne; Ramlau-Hansen, Cecilia H; Bonde, Jens P


    The aim of the present study was to compare assessments of sperm concentration and sperm motility analysed by conventional semen analysis with those obtained by computer-assisted semen analysis (CASA) (Copenhagen Rigshospitalet Image House Sperm Motility Analysis System (CRISMAS) 4.6 software) us...... and motility analysis. This needs to be accounted for in clinics using this software and in studies of determinants of these semen characteristics.......The aim of the present study was to compare assessments of sperm concentration and sperm motility analysed by conventional semen analysis with those obtained by computer-assisted semen analysis (CASA) (Copenhagen Rigshospitalet Image House Sperm Motility Analysis System (CRISMAS) 4.6 software......) using semen samples from 166 young Danish men. The CRISMAS software identifies sperm concentration and classifies spermatozoa into three motility categories. To enable comparison of the two methods, the four motility stages obtained by conventional semen analysis were, based on their velocity...

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

    Directory of Open Access Journals (Sweden)



    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.

  15. Computer-Assisted Diagnosis of the Sleep Apnea-Hypopnea Syndrome: A Review

    Directory of Open Access Journals (Sweden)

    Diego Alvarez-Estevez


    Full Text Available Automatic diagnosis of the Sleep Apnea-Hypopnea Syndrome (SAHS has become an important area of research due to the growing interest in the field of sleep medicine and the costs associated with its manual diagnosis. The increment and heterogeneity of the different techniques, however, make it somewhat difficult to adequately follow the recent developments. A literature review within the area of computer-assisted diagnosis of SAHS has been performed comprising the last 15 years of research in the field. Screening approaches, methods for the detection and classification of respiratory events, comprehensive diagnostic systems, and an outline of current commercial approaches are reviewed. An overview of the different methods is presented together with validation analysis and critical discussion of the current state of the art.

  16. Computer-Assisted Diagnosis of the Sleep Apnea-Hypopnea Syndrome: A Review (United States)

    Alvarez-Estevez, Diego; Moret-Bonillo, Vicente


    Automatic diagnosis of the Sleep Apnea-Hypopnea Syndrome (SAHS) has become an important area of research due to the growing interest in the field of sleep medicine and the costs associated with its manual diagnosis. The increment and heterogeneity of the different techniques, however, make it somewhat difficult to adequately follow the recent developments. A literature review within the area of computer-assisted diagnosis of SAHS has been performed comprising the last 15 years of research in the field. Screening approaches, methods for the detection and classification of respiratory events, comprehensive diagnostic systems, and an outline of current commercial approaches are reviewed. An overview of the different methods is presented together with validation analysis and critical discussion of the current state of the art. PMID:26266052

  17. Effect of computer assistance on observer performance of approximal caries diagnosis using intraoral digital radiography. (United States)

    Araki, Kazuyuki; Matsuda, Yukiko; Seki, Kenji; Okano, Tomohiro


    Logicon Caries Detector (LDDC) is the only commercially available computer-assisted diagnostic system for caries diagnosis. The object of this study is to elucidate the efficacy of LDDC when used by inexperienced dentists. Fifty extracted teeth were imaged using an RVG6000. Seven dentists who had just passed the Japanese National Dental Board Examination observed those images without LDDC (woLDDC) and assessed the probability that caries lesions were present, then re-assessed the same teeth using LDDC (wLDDC). The areas under the receiver operating characteristic curves (Az) were compared. No statistically significant difference was found between woLDDC Az values and wLDDC Az values when caries lesions of all depths were considered. When positive cases were restricted to caries lesions in the inner half of the enamel or to dentine caries lesions, however, wLDDC Az values were significantly larger than woLDDC (p = 0.043 and 0.018, respectively).

  18. Computer-Assisted Diagnosis of the Sleep Apnea-Hypopnea Syndrome: A Review. (United States)

    Alvarez-Estevez, Diego; Moret-Bonillo, Vicente


    Automatic diagnosis of the Sleep Apnea-Hypopnea Syndrome (SAHS) has become an important area of research due to the growing interest in the field of sleep medicine and the costs associated with its manual diagnosis. The increment and heterogeneity of the different techniques, however, make it somewhat difficult to adequately follow the recent developments. A literature review within the area of computer-assisted diagnosis of SAHS has been performed comprising the last 15 years of research in the field. Screening approaches, methods for the detection and classification of respiratory events, comprehensive diagnostic systems, and an outline of current commercial approaches are reviewed. An overview of the different methods is presented together with validation analysis and critical discussion of the current state of the art.

  19. Applied computation and security systems

    CERN Document Server

    Saeed, Khalid; Choudhury, Sankhayan; Chaki, Nabendu


    This book contains the extended version of the works that have been presented and discussed in the First International Doctoral Symposium on Applied Computation and Security Systems (ACSS 2014) held during April 18-20, 2014 in Kolkata, India. The symposium has been jointly organized by the AGH University of Science & Technology, Cracow, Poland and University of Calcutta, India. The Volume I of this double-volume book contains fourteen high quality book chapters in three different parts. Part 1 is on Pattern Recognition and it presents four chapters. Part 2 is on Imaging and Healthcare Applications contains four more book chapters. The Part 3 of this volume is on Wireless Sensor Networking and it includes as many as six chapters. Volume II of the book has three Parts presenting a total of eleven chapters in it. Part 4 consists of five excellent chapters on Software Engineering ranging from cloud service design to transactional memory. Part 5 in Volume II is on Cryptography with two book...

  20. The research of computer multimedia assistant in college English listening (United States)

    Zhang, Qian


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

  1. Universal blind quantum computation for hybrid system (United States)

    Huang, He-Liang; Bao, Wan-Su; Li, Tan; Li, Feng-Guang; Fu, Xiang-Qun; Zhang, Shuo; Zhang, Hai-Long; Wang, Xiang


    As progress on the development of building quantum computer continues to advance, first-generation practical quantum computers will be available for ordinary users in the cloud style similar to IBM's Quantum Experience nowadays. Clients can remotely access the quantum servers using some simple devices. In such a situation, it is of prime importance to keep the security of the client's information. Blind quantum computation protocols enable a client with limited quantum technology to delegate her quantum computation to a quantum server without leaking any privacy. To date, blind quantum computation has been considered only for an individual quantum system. However, practical universal quantum computer is likely to be a hybrid system. Here, we take the first step to construct a framework of blind quantum computation for the hybrid system, which provides a more feasible way for scalable blind quantum computation.

  2. Computer-Assisted Detailing for U.S. Naval Officers (United States)


    optimal aggregated distribution and (2) the Priority Allocation Method (PAM) , an algebraic technique for computing billet fill rates based on inventory...public law which governs promotion. Code Definition Code Definition L Lineal List Officers T TAR Officers (including (Officer Personnel Act) women and...future expansion purposes and is not shown in the Navy Register (NAVPERS 15013). Precedence numbers in the Register (shown as a six-digit lineal number


    Energy Technology Data Exchange (ETDEWEB)

    Frank Macri


    Rolls-Royce Corporation has completed a cooperative agreement under Department of Energy (DOE) contract DE-FC21-96MC33066 in support of the Advanced Turbine Systems (ATS) program to stimulate industrial power generation markets. This DOE contract was performed during the period of October 1995 to December 2002. This final technical report, which is a program deliverable, describes all associated results obtained during Phases 3A and 3B of the contract. Rolls-Royce Corporation (formerly Allison Engine Company) initially focused on the design and development of a 10-megawatt (MW) high-efficiency industrial gas turbine engine/package concept (termed the 701-K) to meet the specific goals of the ATS program, which included single digit NOx emissions, increased plant efficiency, fuel flexibility, and reduced cost of power (i.e., $/kW). While a detailed design effort and associated component development were successfully accomplished for the 701-K engine, capable of achieving the stated ATS program goals, in 1999 Rolls-Royce changed its focus to developing advanced component technologies for product insertion that would modernize the current fleet of 501-K and 601-K industrial gas turbines. This effort would also help to establish commercial venues for suppliers and designers and assist in involving future advanced technologies in the field of gas turbine engine development. This strategy change was partly driven by the market requirements that suggested a low demand for a 10-MW aeroderivative industrial gas turbine, a change in corporate strategy for aeroderivative gas turbine engine development initiatives, and a consensus that a better return on investment (ROI) could be achieved under the ATS contract by focusing on product improvements and technology insertion for the existing Rolls-Royce small engine industrial gas turbine fleet.

  4. A Peer-Assisted Learning Experience in Computer Programming Language Learning and Developing Computer Programming Skills (United States)

    Altintas, Tugba; Gunes, Ali; Sayan, Hamiyet


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

  5. Faculty Attitudes towards Computer Assisted Instruction at the University of Gaziantep

    Directory of Open Access Journals (Sweden)

    Filiz Yalçın TILFARLIOĞLU


    Full Text Available This study aims at revealing faculty attitudes towards computer assistedinstruction at University of Gaziantep, Turkey in a multifaceted way. Additionally, ittries to determine underlying factors that shape these attitudes. After a pilot study, thequestionnaire was applied to a sample population of 145 faculty that were chosenrandomly. The results revealed that faculty attitudes towards computer assistedinsruction are positive. Age, sex, teaching experience, level of proficiency in Englishand computer usage skills have no or little effects over these attitudes.According to theresults of the study, faculty who have prior knowledge on computers expose ratherpositive attitudes towards computers in education.Another important outcome of thestudy is the existence of a gender gap in terms of computer assisted instruction.Althoughthere seems to be no difference between male and female faculty concerning theirbackground education regarding computers, male faculty feel confident about thematter, whereas female faculty feel uncomfortable about using computers in theirlessons.

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

    Directory of Open Access Journals (Sweden)

    Amosa Isiaka Gambari


    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.

  7. Computer-Assisted Classification Patterns in Autoimmune Diagnostics: The AIDA Project

    Directory of Open Access Journals (Sweden)

    Amel Benammar Elgaaied


    Full Text Available Antinuclear antibodies (ANAs are significant biomarkers in the diagnosis of autoimmune diseases in humans, done by mean of Indirect ImmunoFluorescence (IIF method, and performed by analyzing patterns and fluorescence intensity. This paper introduces the AIDA Project (autoimmunity: diagnosis assisted by computer developed in the framework of an Italy-Tunisia cross-border cooperation and its preliminary results. A database of interpreted IIF images is being collected through the exchange of images and double reporting and a Gold Standard database, containing around 1000 double reported images, has been settled. The Gold Standard database is used for optimization of a CAD (Computer Aided Detection solution and for the assessment of its added value, in order to be applied along with an Immunologist as a second Reader in detection of autoantibodies. This CAD system is able to identify on IIF images the fluorescence intensity and the fluorescence pattern. Preliminary results show that CAD, used as second Reader, appeared to perform better than Junior Immunologists and hence may significantly improve their efficacy; compared with two Junior Immunologists, the CAD system showed higher Intensity Accuracy (85,5% versus 66,0% and 66,0%, higher Patterns Accuracy (79,3% versus 48,0% and 66,2%, and higher Mean Class Accuracy (79,4% versus 56,7% and 64.2%.

  8. Computer-Assisted Classification Patterns in Autoimmune Diagnostics: The AIDA Project. (United States)

    Benammar Elgaaied, Amel; Cascio, Donato; Bruno, Salvatore; Ciaccio, Maria Cristina; Cipolla, Marco; Fauci, Alessandro; Morgante, Rossella; Taormina, Vincenzo; Gorgi, Yousr; Marrakchi Triki, Raja; Ben Ahmed, Melika; Louzir, Hechmi; Yalaoui, Sadok; Imene, Sfar; Issaoui, Yassine; Abidi, Ahmed; Ammar, Myriam; Bedhiafi, Walid; Ben Fraj, Oussama; Bouhaha, Rym; Hamdi, Khouloud; Soumaya, Koudhi; Neili, Bilel; Asma, Gati; Lucchese, Mariano; Catanzaro, Maria; Barbara, Vincenza; Brusca, Ignazio; Fregapane, Maria; Amato, Gaetano; Friscia, Giuseppe; Neila, Trai; Turkia, Souayeh; Youssra, Haouami; Rekik, Raja; Bouokez, Hayet; Vasile Simone, Maria; Fauci, Francesco; Raso, Giuseppe


    Antinuclear antibodies (ANAs) are significant biomarkers in the diagnosis of autoimmune diseases in humans, done by mean of Indirect ImmunoFluorescence (IIF) method, and performed by analyzing patterns and fluorescence intensity. This paper introduces the AIDA Project (autoimmunity: diagnosis assisted by computer) developed in the framework of an Italy-Tunisia cross-border cooperation and its preliminary results. A database of interpreted IIF images is being collected through the exchange of images and double reporting and a Gold Standard database, containing around 1000 double reported images, has been settled. The Gold Standard database is used for optimization of a CAD (Computer Aided Detection) solution and for the assessment of its added value, in order to be applied along with an Immunologist as a second Reader in detection of autoantibodies. This CAD system is able to identify on IIF images the fluorescence intensity and the fluorescence pattern. Preliminary results show that CAD, used as second Reader, appeared to perform better than Junior Immunologists and hence may significantly improve their efficacy; compared with two Junior Immunologists, the CAD system showed higher Intensity Accuracy (85,5% versus 66,0% and 66,0%), higher Patterns Accuracy (79,3% versus 48,0% and 66,2%), and higher Mean Class Accuracy (79,4% versus 56,7% and 64.2%).

  9. Computer-assisted Learning as an Educational Tool


    Lassen, Laura Signe; Troelsen, Lasse Blom; Andersen, Jesper Hjøllund; Schou, Kristoffer Carl


    This report examines the possibilities of the construction of a serious educational computer game. The game is minded at supporting a differentiated instruction through methods from Vygotsky’s Zone of Proximal Development and Bruner’s Scaffolding. Through an analysis of the State of the Art we’ve pointed out some specific affordances to include in our constructed game. After finishing the construction of the game we tested it in a 5th grade,and lastly discussed our design goals with the outco...

  10. Computational Models for Nonlinear Aeroelastic Systems Project (United States)

    National Aeronautics and Space Administration — Clear Science Corp. and Duke University propose to develop and demonstrate new and efficient computational methods of modeling nonlinear aeroelastic systems. The...

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

    Directory of Open Access Journals (Sweden)

    Howard eWilliams


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

  12. Distributed computer systems theory and practice

    CERN Document Server

    Zedan, H S M


    Distributed Computer Systems: Theory and Practice is a collection of papers dealing with the design and implementation of operating systems, including distributed systems, such as the amoeba system, argus, Andrew, and grapevine. One paper discusses the concepts and notations for concurrent programming, particularly language notation used in computer programming, synchronization methods, and also compares three classes of languages. Another paper explains load balancing or load redistribution to improve system performance, namely, static balancing and adaptive load balancing. For program effici

  13. Computer-assisted qualitative data analysis software: a review. (United States)

    Banner, Davina J; Albarrran, John W


    Over recent decades, qualitative research has become accepted as a uniquely valuable methodological approach for generating knowledge, particularly in relation to promoting understanding of patients' experiences and responses to illness. Within cardiovascular nursing such qualitative approaches have been widely adopted to systematically investigate a number of phenomena. Contemporary qualitative research practice comprises a diverse range of disciplines and approaches. Computer-aided qualitative data analysis software represents an important facet of this increasingly sophisticated movement. Such software offers an efficient means through which to manage and organize data while supporting rigorous data analysis. The increasing use of qualitative data analysis software has stimulated wide discussion. This research column includes a review of some of the advantages and debates related to the use and integration of qualitative data analysis software.

  14. Transcolonic retrograde ureteric catheterization assisted by 3-d computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Snow, T.M.; Olivier, J.; Vigar, M. [Gold Coast Hospital, Southport, QLD (Australia). Department of Radiology; Parnham, A.P. [Gold Coast Hospital, Southport, QLD (Australia). Department of Radiology


    A 42-year-old woman had bladder extrophy at birth, treated by ureterocolic anastomosis of her single kidney. She suffered recurrent hyperammonaemia, leading to comas, but refused an ileal conduit. During her most recent coma, it was decided to divert her urine to test whether this would reduce hyperammonaemia: this was accomplished by transcolonic retrograde catheterization of the ureter. This was only possible after computed tomography ureterography to show the ureterocolic anastomosis. Ureterocolic anastomosis is associated with several complications, the best known being hyperchloraemic acidosis and potassium deficiency. There is also a very high incidence of stricture at the anastomosis, both benign and malignant. Hyperammonaemia is less common. It can lead to disturbance of consciousness and seizures. It is caused by reabsorption of ammonia from the colon, exacerbated by the presence of urea-splitting organisms. Copyright (1999) Blackwell Science Pty Ltd 8 refs., 4 figs.

  15. Usefulness of hemocytometer as a counting chamber in a computer assisted sperm analyzer (CASA) (United States)

    Eljarah, A.; Chandler, J.; Jenkins, J.A.; Chenevert, J.; Alcanal, A.


    Several methods are used to determine sperm cell concentration, such as the haemocytometer, spectrophotometer, electronic cell counter and computer-assisted semen analysers (CASA). The utility of CASA systems has been limited due to the lack of characterization of individual systems and the absence of standardization among laboratories. The aims of this study were to: 1) validate and establish setup conditions for the CASA system utilizing the haemocytometer as a counting chamber, and 2) compare the different methods used for the determination of sperm cell concentration in bull semen. Two ejaculates were collected and the sperm cell concentration was determined using spectrophotometer and haemocytometer. For the Hamilton-Thorn method, the haemocytometer was used as a counting chamber. Sperm concentration was determined three times per ejaculate samples. A difference (P 0.05) or between the haemocytometer count and the spectrophotometer. Based on the results of this study, we concluded that the haemocytometer can be used in computerized semen analysis systems as a substitute for the commercially available disposable counting chambers, therefore avoiding disadvantageous high costs and slower procedures.

  16. Intelligent computing systems emerging application areas

    CERN Document Server

    Virvou, Maria; Jain, Lakhmi


    This book at hand explores emerging scientific and technological areas in which Intelligent Computing Systems provide efficient solutions and, thus, may play a role in the years to come. It demonstrates how Intelligent Computing Systems make use of computational methodologies that mimic nature-inspired processes to address real world problems of high complexity for which exact mathematical solutions, based on physical and statistical modelling, are intractable. Common intelligent computational methodologies are presented including artificial neural networks, evolutionary computation, genetic algorithms, artificial immune systems, fuzzy logic, swarm intelligence, artificial life, virtual worlds and hybrid methodologies based on combinations of the previous. The book will be useful to researchers, practitioners and graduate students dealing with mathematically-intractable problems. It is intended for both the expert/researcher in the field of Intelligent Computing Systems, as well as for the general reader in t...

  17. Design and validation of advanced driver assistance systems

    NARCIS (Netherlands)

    Gietelink, O.J.


    This thesis presents new tools and methods for the design and validation of advanced driver assistance systems (ADASs). ADASs aim to improve driving comfort and traffic safety by assisting the driver in recognizing and reacting to potentially dangerous traffic situations. A major challenge in

  18. Computer assisted Objective structured clinical examination versus Objective structured clinical examination in assessment of Dermatology undergraduate students

    Directory of Open Access Journals (Sweden)

    Richa Chaudhary


    Conclusions: Computer assisted objective structured clinical examination was found to be a valid, reliable and effective format for dermatology assessment, being rated as the preferred format by examiners.

  19. Effect of Preparation Depth on the Marginal and Internal Adaptation of Computer-aided Design/Computer-assisted Manufacture Endocrowns. (United States)

    Gaintantzopoulou, M D; El-Damanhoury, H M

    The aim of the study was to evaluate the effect of preparation depth and intraradicular extension on the marginal and internal adaptation of computer-aided design/computer-assisted manufacture (CAD/CAM) endocrown restorations. Standardized preparations were made in resin endodontic tooth models (Nissin Dental), with an intracoronal preparation depth of 2 mm (group H2), with extra 1- (group H3) or 2-mm (group H4) intraradicular extensions in the root canals (n=12). Vita Enamic polymer-infiltrated ceramic-network material endocrowns were fabricated using the CEREC AC CAD/CAM system and were seated on the prepared teeth. Specimens were evaluated by microtomography. Horizontal and vertical tomographic sections were recorded and reconstructed by using the CTSkan software (TView v1.1, Skyscan).The surface/void volume (S/V) in the region of interest was calculated. Marginal gap (MG), absolute marginal discrepancy (MD), and internal marginal gap were measured at various measuring locations and calculated in microscale (μm). Marginal and internal discrepancy data (μm) were analyzed with nonparametric Kruskal-Wallis analysis of variance by ranks with Dunn's post hoc, whereas S/V data were analyzed by one-way analysis of variance and Bonferroni multiple comparisons (α=0.05). Significant differences were found in MG, MD, and internal gap width values between the groups, with H2 showing the lowest values from all groups. S/V calculations presented significant differences between H2 and the other two groups (H3 and H4) tested, with H2 again showing the lowest values. Increasing the intraradicular extension of endocrown restorations increased the marginal and internal gap of endocrown restorations.

  20. FPGA-accelerated simulation of computer systems

    CERN Document Server

    Angepat, Hari; Chung, Eric S; Hoe, James C; Chung, Eric S


    To date, the most common form of simulators of computer systems are software-based running on standard computers. One promising approach to improve simulation performance is to apply hardware, specifically reconfigurable hardware in the form of field programmable gate arrays (FPGAs). This manuscript describes various approaches of using FPGAs to accelerate software-implemented simulation of computer systems and selected simulators that incorporate those techniques. More precisely, we describe a simulation architecture taxonomy that incorporates a simulation architecture specifically designed f

  1. Translation Method and Computer Programme for Assisting the Same

    DEFF Research Database (Denmark)


    , a machine translation system translating the written source text into a set of translations hypotheses in the target language, and an integration module combining the set of spoken word hypotheses and the set of machine translation hypotheses obtaining a text in the target language. Thereby obtaining......The present invention relates to a translation method comprising the steps of: a translator speaking a translation of a written source text in a target language, an automatic speech recognition system converting the spoken translation into a set of phone and word hypotheses in the target language...... a significantly improved and faster translation compared to what is achieved by known translation methods....

  2. A unique style of computer-assisted assessment

    Directory of Open Access Journals (Sweden)

    Mike Thelwall


    Full Text Available The Computer-Based Assessment project at the University of Wolverhampton has produced a number of tests built around a common framework. There are three main tests that are used by about 800 students per year, and they replace written tests. There are also two diagnostic tests that are not part of any formal assessment but are used by about 400 students per year. We have produced numerous special versions of these tests for short courses, different teaching techniques, and one for a Broadnet Online training module (Broadnet, n.d.. The tests are all written with 80,000 permutations built in to allow them to be made available for students to use and practise on at all times without compromising security. In fact, there are no serious security concerns because of the random factors, and so the same tests are used every year without the need to be hidden or rewritten. Similar advantages have been found on other projects using random factors; see for example Thoennessen and Harrison (1996.

  3. Evaluation of Computer-Assisted Instruction in Principles of Economics

    Directory of Open Access Journals (Sweden)

    Dennis Coates


    Full Text Available Despite increasing use, little is known about the effectiveness of web-based instructional material. This study assesses the effectiveness of supplementary web-based materials and activities in introductory economics courses. We have collected data on 66 students from three principles sections that describe demographic characteristics, use of web-based instructional resources, and performance on graded quizzes and examinations. We use this data to statistically assess the effectiveness of the web-based material. Student utilization of web-based material was extensive. Students frequently used on-line practice quizzes and accessed the web-based material often. A sizable fraction of the students actively posted and read threaded discussions on the course bulletin board. The statistical analysis shows that both on-line computer graded practice quizzes and posting to the class bulletin board are positively correlated with student performance on the quizzes and exams, but use of web-based content and passive reading of bulletin board posts ("lurking" is not. These results suggest that faculty should focus more on developing self-test quizzes and effective bulletin board discussion projects and less on generating on-line content.

  4. Computational anatomy based on whole body imaging basic principles of computer-assisted diagnosis and therapy

    CERN Document Server

    Masutani, Yoshitaka


    This book deals with computational anatomy, an emerging discipline recognized in medical science as a derivative of conventional anatomy. It is also a completely new research area on the boundaries of several sciences and technologies, such as medical imaging, computer vision, and applied mathematics. Computational Anatomy Based on Whole Body Imaging highlights the underlying principles, basic theories, and fundamental techniques in computational anatomy, which are derived from conventional anatomy, medical imaging, computer vision, and applied mathematics, in addition to various examples of applications in clinical data. The book will cover topics on the basics and applications of the new discipline. Drawing from areas in multidisciplinary fields, it provides comprehensive, integrated coverage of innovative approaches to computational anatomy. As well,Computational Anatomy Based on Whole Body Imaging serves as a valuable resource for researchers including graduate students in the field and a connection with ...

  5. Coverage planning in computer-assisted ablation based on Genetic Algorithm. (United States)

    Ren, Hongliang; Guo, Weian; Sam Ge, Shuzhi; Lim, Wancheng


    An ablation planning system plays a pivotal role in tumor ablation procedures, as it provides a dry run to guide the surgeons in a complicated anatomical environment. Over-ablation, over-perforation or under-ablation may result in complications during the treatments. An optimal solution is desired to have complete tumor coverage with minimal invasiveness, including minimal number of ablations and minimal number of perforation trajectories. As the planning of tumor ablation is a multi-objective problem, it is challenging to obtain optimal covering solutions based on clinician׳s experiences. Meanwhile, it is effective for computer-assisted systems to decide a set of optimal plans. This paper proposes a novel approach of integrating a computational optimization algorithm into the ablation planning system. The proposed ablation planning system is designed based on the following objectives: to achieve complete tumor coverage and to minimize the number of ablations, number of needle trajectories and over-ablation to the healthy tissue. These objectives are taken into account using a Genetic Algorithm, which is capable of generating feasible solutions within a constrained search space. The candidate ablation plans can be encoded in generations of chromosomes, which subsequently evolve based on a fitness function. In this paper, an exponential weight-criterion fitness function has been designed by incorporating constraint parameters that were reflective of the different objectives. According to the test results, the proposed planner is able to generate the set of optimal solutions for tumor ablation problem, thereby fulfilling the aforementioned multiple objectives. Copyright © 2014 Elsevier Ltd. All rights reserved.

  6. Preventive maintenance for computer systems - concepts & issues ...

    African Journals Online (AJOL)

    Performing preventive maintenance activities for the computer is not optional. The computer is a sensitive and delicate device that needs adequate time and attention to make it work properly. In this paper, the concept and issues on how to prolong the life span of the system, that is, the way to make the system last long and ...

  7. Computer Literacy in a Distance Education System (United States)

    Farajollahi, Mehran; Zandi, Bahman; Sarmadi, Mohamadreza; Keshavarz, Mohsen


    In a Distance Education (DE) system, students must be equipped with seven skills of computer (ICDL) usage. This paper aims at investigating the effect of a DE system on the computer literacy of Master of Arts students at Tehran University. The design of this study is quasi-experimental. Pre-test and post-test were used in both control and…

  8. Interactive graphical computer-aided design system (United States)

    Edge, T. M.


    System is used for design, layout, and modification of large-scale-integrated (LSI) metal-oxide semiconductor (MOS) arrays. System is structured around small computer which provides real-time support for graphics storage display unit with keyboard, slave display unit, hard copy unit, and graphics tablet for designer/computer interface.

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


    diMambro Benedict; Chuthapisith Jariya; Doody Gillian


    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...

  10. Computer-assisted discrimination among malignant lymphomas and leukemia using immunophenotyping, intelligent image repositories, and telemicroscopy. (United States)

    Foran, D J; Comaniciu, D; Meer, P; Goodell, L A


    The process of discriminating among pathologies involving peripheral blood, bone marrow, and lymph node has traditionally begun with subjective morphological assessment of cellular materials viewed using light microscopy. The subtle visible differences exhibited by some malignant lymphomas and leukemia, however, give rise to a significant number of false negatives during microscopic evaluation by medical technologists. We have developed a distributed, clinical decision support prototype for distinguishing among hematologic malignancies. The system consists of two major components, a distributed telemicroscopy system and an intelligent image repository. The hybrid system enables individuals located at disparate clinical and research sites to engage in interactive consultation and to obtain computer-assisted decision support. Software, written in JAVA, allows primary users to control the specimen stage, objective lens, light levels, and focus of a robotic microscope remotely while a digital representation of the specimen is continuously broadcast to all session participants. Primary user status can be passed as a token. The system features shared graphical pointers, text messaging capability, and automated database management. Search engines for the database allow one to automatically identify and retrieve images, diagnoses, and correlated clinical data of cases from a "gold standard" database which exhibit spectral and spatial profiles which are most similar to a given query image. The system suggests the most likely diagnosis based on majority logic of the retrieved cases. The system was used to discriminate among three lymphoproliferative disorders and healthy cells. The system provided the correct classification in more than 83% of the cases studied. System performance was evaluated using rigorous statistical assessment and by comparison with human observers.

  11. Applications of Computer-Assisted Navigation for the Minimally Invasive Reduction of Isolated Zygomatic Arch Fractures. (United States)

    Li, Zhi; Yang, Rong-Tao; Li, Zu-Bing


    Computer-assisted navigation has been widely used in oral and maxillofacial surgery. The purpose of this study was to describe the applications of computer-assisted navigation for the minimally invasive reduction of isolated zygomatic arch fractures. All patients identified as having isolated zygomatic arch fractures presenting to the authors' department from April 2013 through November 2014 were included in this prospective study. Minimally invasive reductions of isolated zygomatic arch fractures were performed on these patients under the guidance of computer-assisted navigation. The reduction status was evaluated by postoperative computed tomography (CT) 1 week after the operation. Postoperative complications and facial contours were evaluated during follow-up. Functional recovery was evaluated by the difference between the preoperative maximum interincisal mouth opening and that at the final follow-up. Twenty-three patients were included in this case series. The operation proceeded well in all patients. Postoperatively, all patients displayed uneventful healing without postoperative complication. Postoperative CT showed exact reduction in all cases. Satisfactory facial contour and functional recovery were observed in all patients. The preoperative maximal mouth opening ranged from 8 to 25 mm, and the maximal mouth opening at the final follow-up ranged from 36 to 42 mm. Computer-assisted navigation can be used not only for guiding zygomatic arch fracture reduction, but also for assessing reduction. Computer-assisted navigation is an effective and minimally invasive technique that can be applied in the reduction of isolated zygomatic arch fractures. Copyright © 2015 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

  12. An intelligent multi-media human-computer dialogue system (United States)

    Neal, J. G.; Bettinger, K. E.; Byoun, J. S.; Dobes, Z.; Thielman, C. Y.


    Sophisticated computer systems are being developed to assist in the human decision-making process for very complex tasks performed under stressful conditions. The human-computer interface is a critical factor in these systems. The human-computer interface should be simple and natural to use, require a minimal learning period, assist the user in accomplishing his task(s) with a minimum of distraction, present output in a form that best conveys information to the user, and reduce cognitive load for the user. In pursuit of this ideal, the Intelligent Multi-Media Interfaces project is devoted to the development of interface technology that integrates speech, natural language text, graphics, and pointing gestures for human-computer dialogues. The objective of the project is to develop interface technology that uses the media/modalities intelligently in a flexible, context-sensitive, and highly integrated manner modelled after the manner in which humans converse in simultaneous coordinated multiple modalities. As part of the project, a knowledge-based interface system, called CUBRICON (CUBRC Intelligent CONversationalist) is being developed as a research prototype. The application domain being used to drive the research is that of military tactical air control.

  13. Computer-Aided Design/Computer-Assisted Manufacture Monolithic Restorations for Severely Worn Dentition: A Case History Report. (United States)

    Abou-Ayash, Samir; Boldt, Johannes; Vuck, Alexander

    Full-arch rehabilitation of patients with severe tooth wear due to parafunctional behavior is a challenge for dentists and dental technicians, especially when a highly esthetic outcome is desired. A variety of different treatment options and prosthetic materials are available for such a clinical undertaking. The ongoing progress of computer-aided design/computer-assisted manufacture technologies in combination with all-ceramic materials provides a predictable workflow for these complex cases. This case history report describes a comprehensive, step-by-step treatment protocol leading to an optimally predictable treatment outcome for an esthetically compromised patient.

  14. Computer-related assistive technology: satisfaction and experiences among users with disabilities. (United States)

    Burton, Mary; Nieuwenhuijsen, Els R; Epstein, Marcy J


    Many people with disabilities use assistive technology devices (ATDs) for computer access. The specific focus of this exploratory study was (a) to assess the experiences, opinions, and satisfaction levels of 24 individuals with disabilities using computer-related ATDs; (b) to investigate their awareness of health risk factors related to computer usage; and (c) to examine the psychosocial impact of computer-related ATDs on users. Data were collected via telephone interviews with 24 individuals with physical disabilities who had experience using one or more ATDs. The Quebec User Evaluation with Assistive Technology instrument was used to evaluate users' satisfaction with ATDs in a number of dimensions, including their physical attributes. The Psychosocial Impact of Assistive Devices Scale measured the psychosocial impact (i.e., independence, competence, and adequacy) of an ATD on users. Additional questions were posed to gather information about user's opinions and experiences. Training appeared to be an important component for ATD users, many of whom preferred a setting to try out devices rather than group or individual training. Respondents with visual impairments revealed a higher level of adaptability versus those without visual impairments (p = .001). Additional research is needed to develop specific survey items focused on users of computer-related ATDs and the evaluation of the psychosocial impact of ATDs on computer users.

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

    Directory of Open Access Journals (Sweden)

    Otto Chris


    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.

  16. Computer assistance in femoral derotation osteotomy: a bottom-up approach

    Directory of Open Access Journals (Sweden)

    Auer Christoph


    Full Text Available Severe gait abnormalities in patients with cerebral palsy are often treated by correction osteotomy. The established procedure of femoral derotation osteotomy (FDO has proven effective to realign femur anteversion. Nevertheless, studies have revealed that therapy outcome is subject to substantial inter-patient variability and systematic loss of correction. Our previous work suggests that practical limitations in FDO may significantly contribute to this effect. In this work, we propose a novel computer assisted measurement system to support FDO with objective measurement (desired accuracy: ∼ ± 3° and continuous monitoring of derotation. A prototype system based on the clinically emerging electromagnetic tracking technology is demonstrated which incorporates technical and operational considerations to enable continuous measurement in OR conditions while preserving the conventional workflow without disruptions. In phantom studies, the achieved measurement accuracy (standard error ≅±1.6∘$\\cong\\pm 1.6{}^{\\circ}$ proved high potential and may hugely benefit the quality of surgical execution. Currently, the prototype system is assessed under OR conditions in an in-vivo study with CP patients. Early experience shows high appreciation among surgeons and good potential for future application.

  17. Gold-standard for computer-assisted morphological sperm analysis. (United States)

    Chang, Violeta; Garcia, Alejandra; Hitschfeld, Nancy; Härtel, Steffen


    Published algorithms for classification of human sperm heads are based on relatively small image databases that are not open to the public, and thus no direct comparison is available for competing methods. We describe a gold-standard for morphological sperm analysis (SCIAN-MorphoSpermGS), a dataset of sperm head images with expert-classification labels in one of the following classes: normal, tapered, pyriform, small or amorphous. This gold-standard is for evaluating and comparing known techniques and future improvements to present approaches for classification of human sperm heads for semen analysis. Although this paper does not provide a computational tool for morphological sperm analysis, we present a set of experiments for comparing sperm head description and classification common techniques. This classification base-line is aimed to be used as a reference for future improvements to present approaches for human sperm head classification. The gold-standard provides a label for each sperm head, which is achieved by majority voting among experts. The classification base-line compares four supervised learning methods (1- Nearest Neighbor, naive Bayes, decision trees and Support Vector Machine (SVM)) and three shape-based descriptors (Hu moments, Zernike moments and Fourier descriptors), reporting the accuracy and the true positive rate for each experiment. We used Fleiss' Kappa Coefficient to evaluate the inter-expert agreement and Fisher's exact test for inter-expert variability and statistical significant differences between descriptors and learning techniques. Our results confirm the high degree of inter-expert variability in the morphological sperm analysis. Regarding the classification base line, we show that none of the standard descriptors or classification approaches is best suitable for tackling the problem of sperm head classification. We discovered that the correct classification rate was highly variable when trying to discriminate among non-normal sperm

  18. Computer- and robot-assisted stereotaxy for high-precision small animal brain exploration. (United States)

    Ramrath, Lukas; Vogt, Simon; Jensen, Winnie; Hofmann, Ulrich G; Schweikard, Achim


    This contribution introduces a computer- and robot-assisted framework for stereotactic neurosurgery on small animals. Two major elements of this framework are presented in detail: a robotic stereotactic assistant and the software framework for placement of probes into the brain. The latter integrates modules for registration, insertion control, and preoperative path planning. Two options for path planning are addressed: (a) atlas-based planning and (b) image-based planning based on computed tomography data. The framework is tested performing robot-assisted insertion of microelectrodes and acquisition of electrophysiological recordings in vivo. Concepts for data analysis pointing towards a mapping of position and neural structure to functional data are introduced. Results show that the presented framework allows precise small animal stereotaxy and therefore offers new options for brain research.

  19. Using Computer-Assisted Interviewing to Consult with Children with Autism Spectrum Disorders: An Exploratory Study (United States)

    Barrow, Wilma; Hannah, Elizabeth F.


    This article explores the use of computer-assisted interviewing (CAI) as a tool for consulting with children with autism spectrum disorders (ASD). This is considered within the context of a research study which utilized one CAI programme, "In My Shoes", to investigate children and young people's views of provision, support, and participation in…

  20. A human-assisted computer generated LA-grammar for simple ...

    African Journals Online (AJOL)

    A set of computer programs to generate Left Associative Grammars (LAGs) for natural languages is described. The generation proceeds from examples of correct sentences and needs human assistance to correctly categorise word surfaces. An example LAG for simple Southern Sotho sentences is shown. Hausser's LAGs ...

  1. Promoting Creativity through Assessment: A Formative Computer-Assisted Assessment Tool for Teachers (United States)

    Cropley, David; Cropley, Arthur


    Computer-assisted assessment (CAA) is problematic when it comes to fostering creativity, because in educational thinking the essence of creativity is not finding the correct answer but generating novelty. The idea of "functional" creativity provides rubrics that can serve as the basis for forms of CAA leading to either formative or…

  2. Using Computer-Assisted Instruction to Build Math Fact Fluency: An Implementation Guide (United States)

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


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

  3. Incorporating a Computer Assisted Reading Program into an Adult Vocational Basic Skills Lab. (United States)

    Vescial, Ann; And Others

    A computer-assisted reading program was implemented in the VESL (Vocational English as a Second Language) Center at Hacienda La Puente Adult Schools (California), which provides support services to adult special needs vocational students. The purpose of the program was to improve the technical reading skills of the vocational students. The basic…

  4. Why Should I Present a Thesis on Computer Assisted Ndjebbana on DVD? (United States)

    Auld, Glenn

    This paper justifies the presentation of a Ph.D. thesis about computer-assisted Ndjebbana on a digital video disc (DVD). Ndjebbana is a language spoken by 200 Kunibidji, the indigenous landowners of Maningrida on the north coast of Arnhem Land, Australia. Simple digital talking books about the community were created in Ndjebbana and then presented…

  5. Computer Assisted Vocational Math. Written for TRS-80, Model I, Level II, 16K. (United States)

    Daly, Judith; And Others

    This computer-assisted curriculum is intended to be used to enhance a vocational mathematics/applied mathematics course. A total of 32 packets were produced to increase the basic mathematics skills of students in the following vocational programs: automotive trades, beauty culture, building trades, climate control, electrical trades,…

  6. Effectiveness of Using Computer-Assisted Supplementary Instruction for Teaching the Mole Concept. (United States)

    Yalcinalp, Serpil; And Others


    Examines the effect of computer-assisted instruction (CAI) on students' understanding of chemical formulas and mole concept, and their attitudes toward chemistry and CAI. Reports that students who used the CAI accompanied with lectures scored significantly higher and demonstrated significant improvement in attitudes compared to the control group…

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

    NARCIS (Netherlands)

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


    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

  8. Effect of Tutorial Mode of Computer-Assisted Instruction on Students ...

    African Journals Online (AJOL)

    This study investigated the effect of Tutorial Mode of Computer- Assisted Instruction (CAI) on students' academic performance in practical geography in Nigeria, However, the sample population of eighty (80) Senior Secondary School Two geography students that were randomly selected from two privately owned secondary ...

  9. Can Computer-Assisted Discovery Learning Foster First Graders' Fluency with the Most Basic Addition Combinations? (United States)

    Baroody, Arthur J.; Eiland, Michael D.; Purpura, David J.; Reid, Erin E.


    In a 9-month training experiment, 64 first graders with a risk factor were randomly assigned to computer-assisted structured discovery of the add-1 rule (e.g., the sum of 7 + 1 is the number after "seven" when we count), unstructured discovery learning of this regularity, or an active-control group. Planned contrasts revealed that the…

  10. 77 FR 39498 - Guidances for Industry and Food and Drug Administration Staff: Computer-Assisted Detection... (United States)


    ... Applied to Radiology Images and Radiology Device Data--Premarket Notification (510(k)) Submissions'' (CADe... certain computer-assisted detection (CADe)\\1\\ devices applied to radiology images and radiology device...) and Premarket Notification (510(k)) Submissions'' (CADe clinical performance assessment guidance...

  11. Effects of Computer Assisted Instruction (CAI) on Secondary School Students' Performance in Biology (United States)

    Yusuf, Mudasiru Olalere; Afolabi, Adedeji Olufemi


    This study investigated the effects of computer assisted instruction (CAI) on secondary school students' performance in biology. Also, the influence of gender on the performance of students exposed to CAI in individualised or cooperative learning settings package was examined. The research was a quasi experimental involving a 3 x 2 factorial…

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

    NARCIS (Netherlands)

    Weber, Tim A.; Dendorfer, Sebastian; Grifka, Joachim; Verkerke, Gijsbertus J.; Renkawitz, Tobias


    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).

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

    DEFF Research Database (Denmark)

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


    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...

  14. Climate Change Discourse in Mass Media: Application of Computer-Assisted Content Analysis (United States)

    Kirilenko, Andrei P.; Stepchenkova, Svetlana O.


    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)…

  15. Pull-Down Menus, Menu Design, and Usage Patterns in Computer-Assisted Instruction. (United States)

    Schuerman, Robert L.; Peck, Kyle L.


    Discussion of menu design strategies for computer-assisted instruction (CAI) focuses on a study that investigated whether menu design would affect undergraduate learners' usage patterns during a CAI lesson. Sequential versus random selection of options is discussed, and new measures for describing usage patterns in CAI are explained. (eight…

  16. Cognitive Models of Students' Language Structure: The View from Intelligent Computer Assisted Instruction. (United States)

    Psotka, Joseph; And Others

    Methods and approaches used at the U.S. Army Research Institute to investigate intelligent computer-assisted foreign language instruction are discussed. The research described explores the use of hypertext and natural language processing for improving language training by articulating student knowledge structures and for providing, incidentally, a…

  17. The View of Science and Technology Teachers about Computer Assisted Instruction (United States)

    Toman, Ufuk; Gurbuz, Fatih; Cimer, Sabiha Odabasi


    The purpose of the study is to present the views of the teachers of Primary Science and Technology course about computer assisted instruction. Qualitative research was used in the study. In qualitative researches, the sampling group is small in order to examine the sampling in-depth. Semi-structured interviews were used in the study as data…

  18. Generative Computer-Assisted Instruction and Artificial Intelligence. Report No. 5. (United States)

    Sinnott, Loraine T.

    This paper reviews the state-of-the-art in generative computer-assisted instruction and artificial intelligence. It divides relevant research into three areas of instructional modeling: models of the subject matter; models of the learner's state of knowledge; and models of teaching strategies. Within these areas, work sponsored by Advanced…

  19. Associations among Teachers' Attitudes towards Computer-Assisted Education and TPACK Competencies (United States)

    Baturay, Meltem Huri; Gökçearslan, Sahin; Sahin, Semsettin


    The current study investigates the attitudes of teachers towards Computer-Assisted Education (CAE) and their knowledge of technology, pedagogy and content via TPACK model that assesses the competencies for developing and implementing successful teaching. There were 280 participants in the study. The results of the study indicate that teachers'…

  20. The Relationship between Second Language Acquisition Theory and Computer-Assisted Language Learning (United States)

    Chapelle, Carol A.


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

  1. A Computer-Assisted Multiliteracies Programme as an Alternative Approach to EFL Instruction (United States)

    Lee, Kyungmee; Ardeshiri, Minoo; Cummins, Jim


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

  2. Review Question Formats and Web Design Usability in Computer-Assisted Instruction (United States)

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


    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…


    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. Computer-assisted cognitive remediation therapy: cognition, self-esteem and quality of life in schizophrenia. (United States)

    Garrido, Gemma; Barrios, Maite; Penadés, Rafael; Enríquez, Maria; Garolera, Maite; Aragay, Núria; Pajares, Marta; Vallès, Vicenç; Delgado, Luis; Alberni, Joan; Faixa, Carlota; Vendrell, Josep M


    Quality of life (QoL) is an important outcome in the treatment of schizophrenia. Cognitive deficits have an impact on functional outcomes. Cognitive remediation therapy is emerging as a psychological intervention that targets cognitive impairment, but the effect of computer-assisted cognitive remediation on neuropsychology and social functioning and wellbeing remains unclear. The aim of the current study is to investigate the neurocognitive outcomes of computer-assisted cognitive remediation (CACR) therapy in a sample of schizophrenia patients, and to measure the quality of life and self-esteem as secondary outcomes. Sixty-seven people with schizophrenia were randomly assigned to computer-assisted cognitive remediation or an active control condition. The main outcomes were neuropsychological measures and secondary outcomes (self-esteem and quality of life). Measurements were recorded at baseline and post-treatment. The CACR therapy group improved in speed of processing, working memory and reasoning and problem-solving cognitive domains. QoL and self-esteem measures also showed significant improvements over time in this group. Computer-assisted cognitive remediation therapy for people with schizophrenia achieved improvements in neuropsychological performance and in QoL and self-esteem measurements. © 2013 Elsevier B.V. All rights reserved.

  5. DLI-IBM Joint Feasibility Study in Computer-Assisted Foreign Language Instruction. Final Report. (United States)

    Adams, Edward N.; Rosenbaum, Peter S.

    This document is the final report on a study of the use of computer assisted instruction (CAI). The objective of the study was to evaluate the potential applicability and usefulness of CAI in the instructional environment of the Defense Language Institute (DLI). The operational phases of the study were implemented in the Russian Aural…

  6. Automatization of Mathematics Skills via Computer-Assisted Instruction among Students with Mild Mental Handicaps. (United States)

    Podell, David M.; And Others


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

  7. The Application of Electroencephalography to Computer Assisted Instruction: A Conceptual Framework. (United States)

    Schack, Edna O.

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

  8. Effect of Computer-Assisted Instruction on Secondary School Students' Achievement in Ecological Concepts (United States)

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


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

  9. Effects of Computer-Assisted Instruction on Performance of Senior High School Biology Students in Ghana (United States)

    Owusu, K. A.; Monney, K. A.; Appiah, J. Y.; Wilmot, E. M.


    This study investigated the comparative efficiency of computer-assisted instruction (CAI) and conventional teaching method in biology on senior high school students. A science class was selected in each of two randomly selected schools. The pretest-posttest non equivalent quasi experimental design was used. The students in the experimental group…

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

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


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

  11. Effectiveness of a Computer-Assisted Intervention for Young Children with Attention and Reading Problems (United States)

    Walcott, Christy M.; Marett, Katherine; Hessel, Amanda B.


    Children who are significantly inattentive and poor early readers require intervention, and traditional tutoring approaches may not be effective with this group. Using a single-subject, multiple-baseline-across-participants design, Study 1 examines whether a computer-assisted reading intervention increases performance for three first-grade…

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

    NARCIS (Netherlands)

    Broekhuijse, M.L.W.J.|info:eu-repo/dai/nl/313871728; Sostaric, E.|info:eu-repo/dai/nl/27685408X; Feitsma, H.; Gadella, B.M.|info:eu-repo/dai/nl/115389873


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

  13. A Comparison of Computer-Assisted Instruction and Tutorials in Hematology and Oncology. (United States)

    Garrett, T. J.; And Others


    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)

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

    DEFF Research Database (Denmark)

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


    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...

  15. Brother-Sister Incest: Data from Anonymous Computer-Assisted Self Interviews (United States)

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


    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…

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

    Luo, Beate


    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…

  17. Teaching Pronunciation with Computer Assisted Pronunciation Instruction in a Technological University (United States)

    Liu, Sze-Chu; Hung, Po-Yi


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

  18. Improving English Pronunciation through Computer-Assisted Programs in Jordanian Universities (United States)

    Al-Qudah, Fatima Zaki Mohammad


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

  19. Effects of Computer-Assisted Instruction for Struggling Elementary Readers with Disabilities (United States)

    Regan, Kelley; Berkeley, Sheri; Hughes, Melissa; Kirby, Suzanne


    Despite a lack of conclusive evidence, many researchers in the field view computer-assisted instruction (CAI) as an opportunity for improved instruction for students with disabilities. This study examined the effects of a CAI program, Lexia Strategies for Older Students (SOS)™ on the word recognition skills of four, upper elementary students with…

  20. Relationship between Pre-Service Music Teachers' Personality and Motivation for Computer-Assisted Instruction (United States)

    Perkmen, Serkan; Cevik, Beste


    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…

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

    NARCIS (Netherlands)

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


    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

  2. The Effects of Computer Assisted Instruction Materials on Approximate Number Skills of Students with Dyscalculia (United States)

    Mutlu, Yilmaz; Akgün, Levent


    The aim of this study is to examine the effects of computer assisted instruction materials on approximate number skills of students with mathematics learning difficulties. The study was carried out with pretest-posttest quasi experimental method with a single subject. The participants of the study consist of a girl and two boys who attend 3rd…

  3. A Compilation of Postgraduate Theses Written in Turkey on Computer Assisted Instruction in Chemistry Education (United States)

    Bozdogan, Aykut Emre; Demirbas, Murat


    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…

  4. Computer Assisted English Language Learning in Costa Rican Elementary Schools: An Experimental Study (United States)

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


    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…

  5. The Effects of Computer-Assisted Material on Students' Cognitive Levels, Misconceptions and Attitudes Towards Science (United States)

    Cepni, Salih; Tas, Erol; Kose, Sacit


    The purpose of this study was to investigate the effects of a Computer-Assisted Instruction Material (CAIM) related to "photosynthesis" topic on student cognitive development, misconceptions and attitudes. The study conducted in 2002-2003 academic year and was carried out in two different classes taught by the same teacher, in which…

  6. Generalization of Computer-Assisted Prosody Training: Quantitative and Qualitative Findings (United States)

    Hardison, Debra M.


    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…

  7. The Effect of Adaptive Confidence Strategies in Computer-Assisted Instruction on Learning and Learner Confidence (United States)

    Warren, Richard Daniel


    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…

  8. Effect of Different Types of Computer-Assisted Feedback Strategies on Achievement and Response Confidence. (United States)

    Clark, Kevin; Dwyer, Francis M.


    This study examined the effects of different types of computer-assisted feedback strategies (knowledge of correct response, knowledge of response, and elaborative) and different types of information (facts, concepts, and principles) on student achievement and response confidence. Findings indicated a positive correlation between achievement and…

  9. Computer-assisted instruction before colonoscopy is as effective as nurse counselling, a clinical pilot trial

    NARCIS (Netherlands)

    Veldhuijzen, G.; Klemt-Kropp, M.; Noomen, C.; Esch, A.A.J. van; Tjwa, E.T.; Drenth, J.P.


    BACKGROUND AND STUDY AIMS: Better patient education prior to colonoscopy improves adherence to instructions for bowel preparation and leads to cleaner colons. We reasoned that computer assisted instruction (CAI) using video and 3 D animations followed by nurse contact maximizes the effectiveness of

  10. A Method for Selection of Appropriate Assistive Technology for Computer Access (United States)

    Jenko, Mojca


    Assistive technologies (ATs) for computer access enable people with disabilities to be included in the information society. Current methods for assessment and selection of the most appropriate AT for each individual are nonstandardized, lengthy, subjective, and require substantial clinical experience of a multidisciplinary team. This manuscript…

  11. A Computer Assisted Application in Preschool Education: Seasons and Their Characteristics (United States)

    Akçay, Nilufer Okur


    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…

  12. Endovascular navigation based on real/virtual environments cooperation for computer-assisted TEAM procedures (United States)

    Goksu, Cemil; Haigron, Pascal; Acosta, Oscar; Lucas, Antoine


    Transfemoral Endovascular Aneurysm Management, the less invasive treatment of Aortic Abdominal Aneurysms (AAA), is a highly specialized procedure, using advanced devices and requiring a high degree of clinical expertise. There is a great need for a navigation guidance system able to make this procedure safer and more precise. In this context of computer-assisted minimally invasive interventional procedures, we propose a new framework based on the cooperation between the real environment where the intervention takes place and a patient-specific virtual environment, which contains a virtual operating room including a C-arm model as well as the 3D preoperative patient data. This approach aims to deal with the problem of lack of knowledge about soft tissue behavior by better exploiting available information before and during the intervention through a cooperative approach. In order to assist the TEAM procedure in standard interventional conditions, we applied this framework to design a 3D navigation guidance system, which has been successfully used during three TEAM interventions in the operating room. Intra-operatively, anatomical feature-based 2D/3D registration between a single 2D fluoroscopic view, reproduced from the pose planned in the virtual environment, and the preoperative CT volume, is performed by means of a chamfer distance map. The 3D localization of the endovascular devices (sheath, guide wire, prosthesis) tracked either interactively or automatically on 2D sequences, is constrained to either the 3D vascular tree or a 3D device model. Moreover, we propose a first solution to take into account the tissue deformations during this particular intervention and to update the virtual environment with the intraoperative data.

  13. Computer-assisted update of a consumer health vocabulary through mining of social network data. (United States)

    Doing-Harris, Kristina M; Zeng-Treitler, Qing


    Consumer health vocabularies (CHVs) have been developed to aid consumer health informatics applications. This purpose is best served if the vocabulary evolves with consumers' language. Our objective was to create a computer assisted update (CAU) system that works with live corpora to identify new candidate terms for inclusion in the open access and collaborative (OAC) CHV. The CAU system consisted of three main parts: a Web crawler and an HTML parser, a candidate term filter that utilizes natural language processing tools including term recognition methods, and a human review interface. In evaluation, the CAU system was applied to the health-related social network website The system's utility was assessed by comparing the candidate term list it generated to a list of valid terms hand extracted from the text of the crawled webpages. The CAU system identified 88,994 unique terms 1- to 7-grams ("n-grams" are n consecutive words within a sentence) in 300 crawled webpages. The manual review of the crawled webpages identified 651 valid terms not yet included in the OAC CHV or the Unified Medical Language System (UMLS) Metathesaurus, a collection of vocabularies amalgamated to form an ontology of medical terms, (ie, 1 valid term per 136.7 candidate n-grams). The term filter selected 774 candidate terms, of which 237 were valid terms, that is, 1 valid term among every 3 or 4 candidates reviewed. The CAU system is effective for generating a list of candidate terms for human review during CHV development.

  14. Computer-assisted orthopaedic surgery and robotic surgery in total hip arthroplasty. (United States)

    Sugano, Nobuhiko


    Various systems of computer-assisted orthopaedic surgery (CAOS) in total hip arthroplasty (THA) were reviewed. The first clinically applied system was an active robotic system (ROBODOC), which performed femoral implant cavity preparation as programmed preoperatively. Several reports on cementless THA with ROBODOC showed better stem alignment and less variance in limb-length inequality on radiographic evaluation, less incidence of pulmonary embolic events on transesophageal cardioechogram, and less stress shielding on the dual energy X-ray absorptiometry analysis than conventional manual methods. On the other hand, some studies raise issues with active systems, including a steep learning curve, muscle and nerve damage, and technical complications, such as a procedure stop due to a bone motion during cutting, requiring re-registration and registration failure. Semi-active robotic systems, such as Acrobot and Rio, were developed for ease of surgeon acceptance. The drill bit at the tip of the robotic arm is moved by a surgeon's hand, but it does not move outside of a milling path boundary, which is defined according to three-dimensional (3D) image-based preoperative planning. However, there are still few reports on THA with these semi-active systems. Thanks to the advancements in 3D sensor technology, navigation systems were developed. Navigation is a passive system, which does not perform any actions on patients. It only provides information and guidance to the surgeon who still uses conventional tools to perform the surgery. There are three types of navigation: computed tomography (CT)-based navigation, imageless navigation, and fluoro-navigation. CT-based navigation is the most accurate, but the preoperative planning on CT images takes time that increases cost and radiation exposure. Imageless navigation does not use CT images, but its accuracy depends on the technique of landmark pointing, and it does not take into account the individual uniqueness of the anatomy

  15. Impacts and Opportunities for Engineering in the Era of Cloud Computing Systems (United States)


    massive cloud-based infrastructure (particularly around Siri ) promises revolutionary changes in human computer (spoken-language) interaction. Radio...users’ agreement) to assist in the repair process. Similar mechanisms can be employed for cloud-based systems, although they must be further adapted...University of Maryland College Park. Email: MDiep@fc- Dr. LiGuo Huang is an Assistant Professor in the Dept. of Computer Science and Engineering

  16. The Information Science Experiment System - The computer for science experiments in space (United States)

    Foudriat, Edwin C.; Husson, Charles


    The concept of the Information Science Experiment System (ISES), potential experiments, and system requirements are reviewed. The ISES is conceived as a computer resource in space whose aim is to assist computer, earth, and space science experiments, to develop and demonstrate new information processing concepts, and to provide an experiment base for developing new information technology for use in space systems. The discussion covers system hardware and architecture, operating system software, the user interface, and the ground communication link.

  17. The First Korean Experience of Telemanipulative Robot-Assisted Laparoscopic Cholecystectomy Using the da Vinci System (United States)

    Kang, Chang Moo; Chi, Hoon Sang; Hyeung, Woo Jin; Kim, Kyung Sik; Choi, Jin Sub; Kim, Byong Ro


    With the advancement of laparoscopic instruments and computer sciences, complex surgical procedures are expected to be safely performed by robot assisted telemanipulative laparoscopic surgery. The da Vinci system (Intuitive Surgical, Mountain View, CA, USA) became available at the many surgical fields. The wrist like movements of the instrument's tip, as well as 3-dimensional vision, could be expected to facilitate more complex laparoscopic procedure. Here, we present the first Korean experience of da Vinci robotic assisted laparoscopic cholecystectomy and discuss the introduction and perspectives of this robotic system. PMID:17594166

  18. Standardization of computer-assisted semen analysis using an e-learning application. (United States)

    Ehlers, J; Behr, M; Bollwein, H; Beyerbach, M; Waberski, D


    Computer-assisted semen analysis (CASA) is primarily used to obtain accurate and objective kinetic sperm measurements. Additionally, AI centers use computer-assessed sperm concentration in the sample as a basis for calculating the number of insemination doses available from a given ejaculate. The reliability of data is often limited and results can vary even when the same CASA systems with identical settings are used. The objective of the present study was to develop a computer-based training module for standardized measurements with a CASA system and to evaluate its training effect on the quality of the assessment of sperm motility and concentration. A digital versatile disc (DVD) has been produced showing the standardization of sample preparation and analysis with the CASA system SpermVision™ version 3.0 (Minitube, Verona, WI, USA) in words, pictures, and videos, as well as the most probable sources of error. Eight test persons educated in spermatology, but with different levels of experience with the CASA system, prepared and assessed 10 aliquots from one prediluted bull ejaculate using the same CASA system and laboratory equipment before and after electronic learning (e-learning). After using the e-learning application, the coefficient of variation was reduced on average for the sperm concentration from 26.1% to 11.3% (P ≤ 0.01), and for motility from 5.8% to 3.1% (P ≤ 0.05). For five test persons, the difference in the coefficient of variation before and after use of the e-learning application was significant (P ≤ 0.05). Individual deviations of means from the group mean before e-learning were reduced compared with individual deviations from the group mean after e-learning. According to a survey, the e-learning application was highly accepted by users. In conclusion, e-learning presents an effective, efficient, and accepted tool for improvement of the precision of CASA measurements. This study provides a model for the standardization of other

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

    Directory of Open Access Journals (Sweden)

    Ahmet YUMUŞAK


    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. MTA Computer Based Evaluation System. (United States)

    Brenner, Lisa P.; And Others

    The MTA PLATO-based evaluation system, which has been implemented by a consortium of schools of medical technology, is designed to be general-purpose, modular, data-driven, and interactive, and to accommodate other national and local item banks. The system provides a comprehensive interactive item-banking system in conjunction with online student…