WorldWideScience

Sample records for cai computer aided

  1. NALDA (Naval Aviation Logistics Data Analysis) CAI (computer aided instruction)

    Energy Technology Data Exchange (ETDEWEB)

    Handler, B.H. (Oak Ridge K-25 Site, TN (USA)); France, P.A.; Frey, S.C.; Gaubas, N.F.; Hyland, K.J.; Lindsey, A.M.; Manley, D.O. (Oak Ridge Associated Universities, Inc., TN (USA)); Hunnum, W.H. (North Carolina Univ., Chapel Hill, NC (USA)); Smith, D.L. (Memphis State Univ., TN (USA))

    1990-07-01

    Data Systems Engineering Organization (DSEO) personnel developed a prototype computer aided instruction CAI system for the Naval Aviation Logistics Data Analysis (NALDA) system. The objective of this project was to provide a CAI prototype that could be used as an enhancement to existing NALDA training. The CAI prototype project was performed in phases. The task undertaken in Phase I was to analyze the problem and the alternative solutions and to develop a set of recommendations on how best to proceed. The findings from Phase I are documented in Recommended CAI Approach for the NALDA System (Duncan et al., 1987). In Phase II, a structured design and specifications were developed, and a prototype CAI system was created. A report, NALDA CAI Prototype: Phase II Final Report, was written to record the findings and results of Phase II. NALDA CAI: Recommendations for an Advanced Instructional Model, is comprised of related papers encompassing research on computer aided instruction CAI, newly developing training technologies, instructional systems development, and an Advanced Instructional Model. These topics were selected because of their relevancy to the CAI needs of NALDA. These papers provide general background information on various aspects of CAI and give a broad overview of new technologies and their impact on the future design and development of training programs. The paper within have been index separately elsewhere.

  2. Personality preference influences medical student use of specific computer-aided instruction (CAI

    Directory of Open Access Journals (Sweden)

    Halsey Martha

    2006-02-01

    Full Text Available Abstract Background The objective of this study was to test the hypothesis that personality preference, which can be related to learning style, influences individual utilization of CAI applications developed specifically for the undergraduate medical curriculum. Methods Personality preferences of students were obtained using the Myers-Briggs Type Indicator (MBTI test. CAI utilization for individual students was collected from entry logs for two different web-based applications (a discussion forum and a tutorial used in the basic science course on human anatomy. Individual login data were sorted by personality preference and the data statistically analyzed by 2-way mixed ANOVA and correlation. Results There was a wide discrepancy in the level and pattern of student use of both CAI. Although individual use of both CAI was positively correlated irrespective of MBTI preference, students with a "Sensing" preference tended to use both CAI applications more than the "iNtuitives". Differences in the level of use of these CAI applications (i.e., higher use of discussion forum vs. a tutorial were also found for the "Perceiving/Judging" dimension. Conclusion We conclude that personality/learning preferences of individual students influence their use of CAI in the medical curriculum.

  3. An investigative study into the effectiveness of using computer-aided instruction (CAI) as a laboratory component of college-level biology: A case study

    Science.gov (United States)

    Barrett, Joan Beverly

    Community colleges serve the most diverse student populations in higher education. They consist of non-traditional, part-time, older, intermittent, and mobile students of different races, ethnic backgrounds, language preferences, physical and mental abilities, and learning style preferences. Students who are academically challenged may have diverse learning characteristics that are not compatible with the more traditional approaches to the delivery of instruction. With this need come new ways of solving the dilemma, such as Computer-aided Instruction (CAI). This case study investigated the use of CAI as a laboratory component of college-level biology in a small, rural community college setting. The intent was to begin to fill a void that seems to exist in the literature regarding the role of the faculty in the development and use of CAI. In particular, the investigator was seeking to understand the practice and its effectiveness, especially in helping the under prepared student. The case study approach was chosen to examine a specific phenomenon within a single institution. Ethnographic techniques, such as interviewing, documentary analysis, life's experiences, and participant observations were used to collect data about the phenomena being studied. Results showed that the faculty was primarily self-motivated and self-taught in their use of CAI as a teaching and learning tool. The importance of faculty leadership and collegiality was evident. Findings showed the faculty confident that expectations of helping students who have difficulties with mathematical concepts have been met and that CAI is becoming the most valuable of learning tools. In a traditional college classroom, or practice, time is the constant (semesters) and competence is the variable. In the CAI laboratory time became the variable and competence the constant. The use of CAI also eliminated hazardous chemicals that were routinely used in the more traditional lab. Outcomes showed that annual savings

  4. Effective Computer Aided Instruction in Biomedical Science

    OpenAIRE

    Hause, Lawrence L.

    1985-01-01

    A menu-driven Computer Aided Instruction (CAI) package was integrated with word processing and effectively applied in five curricula at the Medical College of Wisconsin. Integration with word processing facilitates the ease of CAI development by instructors and was found to be the most important step in the development of CAI. CAI modules were developed and are currently used to reinforce lectures in medical pathology, laboratory quality control, computer programming and basic science reviews...

  5. Computer Assisted Instruction (CAI) in Language Teaching

    Institute of Scientific and Technical Information of China (English)

    Xin; Jing

    2015-01-01

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

  6. Curriculum planning and computer-assisted instruction (CAI) within clinical nursing education.

    OpenAIRE

    Perciful, E. G.

    1992-01-01

    Some experts in nursing and computers have stated that the integration of the computer within nursing education needs to be planned. It has also been declared that there is a need for a body of knowledge that describes the planning and implementing of CAI and the degree of success with the implementation of CAI within nursing education. There is a paucity of literature addressing the planning, implementing, and evaluation of CAI within clinical nursing education. The purpose of this paper is ...

  7. Computer aided information system for a PWR

    International Nuclear Information System (INIS)

    The computer aided information system (CAIS) is designed with a view to improve the performance of the operator. CAIS assists the plant operator in an advisory and support role, thereby reducing the workload level and potential human errors. The CAIS as explained here has been designed for a PWR type KLT- 40 used in Floating Nuclear Power Stations (FNPS). However the underlying philosophy evolved in designing the CAIS can be suitably adopted for other type of nuclear power plants too (BWR, PHWR). Operator information is divided into three broad categories: a) continuously available information b) automatically available information and c) on demand information. Two in number touch screens are provided on the main control panel. One is earmarked for continuously available information and the other is dedicated for automatically available information. Both the screens can be used at the operator's discretion for on-demand information. Automatically available information screen overrides the on-demand information screens. In addition to the above, CAIS has the features of event sequence recording, disturbance recording and information documentation. CAIS design ensures that the operator is not overburdened with excess and unnecessary information, but at the same time adequate and well formatted information is available. (author). 5 refs., 4 figs

  8. Computer-aided instruction system

    International Nuclear Information System (INIS)

    This research thesis addresses the use of teleprocessing and time sharing by the RAX IBM system and the possibility to introduce a dialog with the machine to develop an application in which the computer plays the role of a teacher for different pupils at the same time. Two operating modes are thus exploited: a teacher-mode and a pupil-mode. The developed CAI (computer-aided instruction) system comprises a checker to check the course syntax in teacher-mode, a translator to trans-code the course written in teacher-mode into a form which can be processes by the execution programme, and the execution programme which presents the course in pupil-mode

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

    Directory of Open Access Journals (Sweden)

    Tuğba Hangül

    2010-12-01

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

  10. The computer aided education and training system for accident management

    International Nuclear Information System (INIS)

    The education and training system for Accident Management was developed by the Japanese BWR group and Hitachi Ltd. The education and training system is composed of two systems. One is computer aided instruction (CAI) education system and the education and training system with computer simulations. Both systems are designed to be executed on personal computers. The outlines of the CAI education system and the education and training system with simulator are reported below. These systems provides plant operators and technical support center staff with the effective education and training for accident management. (author)

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

    OpenAIRE

    Tuğba Hangül; Devrim Uzel

    2010-01-01

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

  12. Computer aided control engineering

    DEFF Research Database (Denmark)

    Szymkat, Maciej; Ravn, Ole

    1997-01-01

    Current developments in the field of Computer Aided Control Engineering (CACE) have a visible impact on the design methodologies and the structure of the software tools supporting them. Today control engineers has at their disposal libraries, packages or programming environments that may be speci......Current developments in the field of Computer Aided Control Engineering (CACE) have a visible impact on the design methodologies and the structure of the software tools supporting them. Today control engineers has at their disposal libraries, packages or programming environments that may...

  13. Computer aided product design

    DEFF Research Database (Denmark)

    Constantinou, Leonidas; Bagherpour, Khosrow; Gani, Rafiqul; Klein, J.A.; Wu, D.T.

    A general methodology for Computer Aided Product Design (CAPD) with specified property constraints which is capable of solving a large range of problems is presented. The methodology employs the group contribution approach, generates acyclic, cyclic and aromatic compounds of various degrees of......-liquid equilibria (LLE), solid-liquid equilibria (SLE) and gas solubility. Finally, a computer program based on the extended methodology has been developed and the results from five case studies highlighting various features of the methodology are presented....

  14. Computer aided product design

    DEFF Research Database (Denmark)

    Constantinou, Leonidas; Bagherpour, Khosrow; Gani, Rafiqul;

    1996-01-01

    A general methodology for Computer Aided Product Design (CAPD) with specified property constraints which is capable of solving a large range of problems is presented. The methodology employs the group contribution approach, generates acyclic, cyclic and aromatic compounds of various degrees......-liquid equilibria (LLE), solid-liquid equilibria (SLE) and gas solubility. Finally, a computer program based on the extended methodology has been developed and the results from five case studies highlighting various features of the methodology are presented....

  15. Computer aided control engineering

    DEFF Research Database (Denmark)

    Szymkat, Maciej; Ravn, Ole

    Current developments in the field of Computer Aided Control Engineering (CACE) have a visible impact on the design methodologies and the structure of the software tools supporting them. Today control engineers has at their disposal libraries, packages or programming environments that may be...

  16. Computer aided magnet design

    International Nuclear Information System (INIS)

    In this paper the elements of a computer aided magnet design system is outlined. The methods of solving the field equations are briefly reviewed, followed by a survey of available codes. Particular examples of the use of RAL codes in solving 3D magnetic design problems are given. Future developments are discussed. (author)

  17. Computer aided safety analysis

    International Nuclear Information System (INIS)

    The document reproduces 20 selected papers from the 38 papers presented at the Technical Committee/Workshop on Computer Aided Safety Analysis organized by the IAEA in co-operation with the Institute of Atomic Energy in Otwock-Swierk, Poland on 25-29 May 1987. A separate abstract was prepared for each of these 20 technical papers. Refs, figs and tabs

  18. Computer aided engineering drawing

    CERN Document Server

    Dubey, N H

    2006-01-01

    This book caters to the need of First Year Engineering Students desiring to achieve a firm footage in the Subject Computer Aided Engineering Drawing. The formulation and methodology of the contents in this book is that one can easily understand the finer details of the subject and can master them with regular practice. It is essential that every on involved in engineering field must understand CAD for Drawing. This book contains well-illustrated figures along with theory for explaining procedures wherever necessary. A large number of solved and unsolved problems are provided so that one can ge

  19. Computer aided surface representation

    Energy Technology Data Exchange (ETDEWEB)

    Barnhill, R.E.

    1989-02-09

    The central research problem of this project is the effective representation and display of surfaces, interpolating to given information, in three or more dimensions. In a typical problem, we wish to create a surface from some discrete information. If this information is itself on another surface, the problem is to determine a surface defined on a surface,'' which is discussed below. Often, properties of an already constructed surface are desired: such geometry processing'' is described below. The Summary of Proposed Research from our original proposal describes the aims of this research project. This Summary and the Table of Contents from the original proposal are enclosed as an Appendix to this Progress Report. The broad sweep from constructive mathematics through algorithms and computer graphics displays is utilized in the research. The wide range of activity, directed in both theory and applications, makes this project unique. Last month in the first Ardent Titan delivered in the State of Arizona came to our group, funded by the DOE and Arizona State University. Although the Titan is a commercial product, its newness requires our close collaboration with Ardent to maximize results. During the past year, four faculty members and several graduate research assistants have worked on this DOE project. The gaining of new professionals is an important aspect of this project. A listing of the students and their topics is given in the Appendix. The most significant publication during the past year is the book, Curves and Surfaces for Computer Aided Geometric Design, by Dr. Gerald Farin. This 300 page volume helps fill a considerable gap in the subject and includes many new results on Bernstein-Bezier curves and surfaces.

  20. Computer Aided Mathematics

    DEFF Research Database (Denmark)

    Sinclair, Robert

    1998-01-01

    Course notes of a PhD course held in 1998. The central idea is to introduce students to computational mathematics using object oriented programming in C++.......Course notes of a PhD course held in 1998. The central idea is to introduce students to computational mathematics using object oriented programming in C++....

  1. Computer-Aided Design (CAD).

    Science.gov (United States)

    Burns, William E.

    1986-01-01

    Discusses the field of computer-aided design, which combines the skills and creativity of the architect, designer, drafter, and engineer with the power of the computer. Reports on job tasks, applications, background of the field, job outlook, and necessary training. (CH)

  2. Computer aided surface representation

    Energy Technology Data Exchange (ETDEWEB)

    Barnhill, R.E.

    1990-02-19

    The central research problem of this project is the effective representation, computation, and display of surfaces interpolating to information in three or more dimensions. If the given information is located on another surface, then the problem is to construct a surface defined on a surface''. Sometimes properties of an already defined surface are desired, which is geometry processing''. Visualization of multivariate surfaces is possible by means of contouring higher dimensional surfaces. These problems and more are discussed below. The broad sweep from constructive mathematics through computational algorithms to computer graphics illustrations is utilized in this research. The breadth and depth of this research activity makes this research project unique.

  3. Computer-Aided Modeling Framework

    DEFF Research Database (Denmark)

    Fedorova, Marina; Sin, Gürkan; Gani, Rafiqul

    Models are playing important roles in design and analysis of chemicals based products and the processes that manufacture them. Computer-aided methods and tools have the potential to reduce the number of experiments, which can be expensive and time consuming, and there is a benefit of working with...... development and application. The proposed work is a part of the project for development of methods and tools that will allow systematic generation, analysis and solution of models for various objectives. It will use the computer-aided modeling framework that is based on a modeling methodology, which combines...... contribution, the concept of template-based modeling is presented and application is highlighted for the specific case of catalytic membrane fixed bed models. The modeling template is integrated in a generic computer-aided modeling framework. Furthermore, modeling templates enable the idea of model reuse as...

  4. Computer aided surface representation

    Energy Technology Data Exchange (ETDEWEB)

    Barnhill, R E

    1987-11-01

    The aims of this research are the creation of new surface forms and the determination of geometric and physical properties of surfaces. The full sweep from constructive mathematics through the implementation of algorithms and the interactive computer graphics display of surfaces is utilized. Both three-dimensional and multi- dimensional surfaces are considered. Particular emphasis is given to the scientific computing solution of Department of Energy problems. The methods that we have developed and that we are proposing to develop allow applications such as: Producing smooth contour maps from measured data, such as weather maps. Modeling the heat distribution inside a furnace from sample measurements. Terrain modeling based on satellite pictures. The investigation of new surface forms includes the topics of triangular interpolants, multivariate interpolation, surfaces defined on surfaces and monotone and/or convex surfaces. The geometric and physical properties considered include contours, the intersection of surfaces, curvatures as a interrogation tool, and numerical integration.

  5. Computer aided airship design

    Science.gov (United States)

    Davis, S. J.; Rosenstein, H.

    1975-01-01

    The Comprehensive Airship Sizing and Performance Computer Program (CASCOMP) is described which was developed and used in the design and evaluation of advanced lighter-than-air (LTA) craft. The program defines design details such as engine size and number, component weight buildups, required power, and the physical dimensions of airships which are designed to meet specified mission requirements. The program is used in a comparative parametric evaluation of six advanced lighter-than-air concepts. The results indicate that fully buoyant conventional airships have the lightest gross lift required when designed for speeds less than 100 knots and the partially buoyant concepts are superior above 100 knots. When compared on the basis of specific productivity, which is a measure of the direct operating cost, the partially buoyant lifting body/tilting prop-rotor concept is optimum.

  6. Computer-aided translation tools

    DEFF Research Database (Denmark)

    Christensen, Tina Paulsen; Schjoldager, Anne

    2016-01-01

    The paper reports on a questionnaire survey from 2013 of the uptake and use of computer-aided translation (CAT) tools by Danish translation service providers (TSPs) and discusses how these tools appear to have impacted on the Danish translation industry. According to our results, the uptake in...

  7. CAI多媒體教學軟體之開發模式 Using an Instructional Design Model for Developing a Multimedia CAI Courseware

    OpenAIRE

    Hsin-Yih Shyu

    1995-01-01

    無This article outlined a systematic instructional design model for developing a multimedia computer-aided instruction (CAI) courseware. The model illustrated roles and tasks as two dimensions necessary in a CAI production teamwork. Four major components (Analysis, Design, Development, and Revise/Evaluation) following by totally 25 steps are provided. Eight roles with each competent skills were identified. The model will be useful in serving as a framework for developing a mulrimedia CAI cours...

  8. Computer-Aided Modeling Framework

    DEFF Research Database (Denmark)

    Fedorova, Marina; Sin, Gürkan; Gani, Rafiqul

    them. As the required models may be complex and require multiple time and/or length scales, their development and application for product-process design is not trivial. Therefore, a systematic modeling framework can contribute by significantly reducing the time and resources needed for model...... development and application. The proposed work is a part of the project for development of methods and tools that will allow systematic generation, analysis and solution of models for various objectives. It will use the computer-aided modeling framework that is based on a modeling methodology, which combines...... contribution, the concept of template-based modeling is presented and application is highlighted for the specific case of catalytic membrane fixed bed models. The modeling template is integrated in a generic computer-aided modeling framework. Furthermore, modeling templates enable the idea of model reuse as...

  9. Computer aids for plant operators

    International Nuclear Information System (INIS)

    For some time, particularly since the TMI accident, nuclear power plant operators have been aware of the difficulties involved in diagnosing accidents and returning plants to their stable, safe operating mode. There are various possible solutions to these problems: improve control organization during accident situations, rewrite control procedures, integrate safety engineers in shifts, improve control rooms, and implement additional computer aids. The purpose of this presentation is to describe the efforts undertaken by EDF over the last few years in this field

  10. Computer-Aided Parts Estimation

    OpenAIRE

    Cunningham, Adam; Smart, Robert

    1993-01-01

    In 1991, Ford Motor Company began deployment of CAPE (computer-aided parts estimating system), a highly advanced knowledge-based system designed to generate, evaluate, and cost automotive part manufacturing plans. cape is engineered on an innovative, extensible, declarative process-planning and estimating knowledge representation language, which underpins the cape kernel architecture. Many manufacturing processes have been modeled to date, but eventually every significant process in motor veh...

  11. CAI多媒體教學軟體之開發模式 Using an Instructional Design Model for Developing a Multimedia CAI Courseware

    Directory of Open Access Journals (Sweden)

    Hsin-Yih Shyu

    1995-09-01

    Full Text Available 無This article outlined a systematic instructional design model for developing a multimedia computer-aided instruction (CAI courseware. The model illustrated roles and tasks as two dimensions necessary in a CAI production teamwork. Four major components (Analysis, Design, Development, and Revise/Evaluation following by totally 25 steps are provided. Eight roles with each competent skills were identified. The model will be useful in serving as a framework for developing a mulrimedia CAI courseware for educators, instructional designers and CAI industry developers.

  12. Computer aided safety analysis 1989

    International Nuclear Information System (INIS)

    The meeting was conducted in a workshop style, to encourage involvement of all participants during the discussions. Forty-five (45) experts from 19 countries, plus 22 experts from the GDR participated in the meeting. A list of participants can be found at the end of this volume. Forty-two (42) papers were presented and discussed during the meeting. Additionally an open discussion was held on the possible directions of the IAEA programme on Computer Aided Safety Analysis. A summary of the conclusions of these discussions is presented in the publication. The remainder of this proceedings volume comprises the transcript of selected technical papers (22) presented in the meeting. It is the intention of the IAEA that the publication of these proceedings will extend the benefits of the discussions held during the meeting to a larger audience throughout the world. The Technical Committee/Workshop on Computer Aided Safety Analysis was organized by the IAEA in cooperation with the National Board for Safety and Radiological Protection (SAAS) of the German Democratic Republic in Berlin. The purpose of the meeting was to provide an opportunity for discussions on experiences in the use of computer codes used for safety analysis of nuclear power plants. In particular it was intended to provide a forum for exchange of information among experts using computer codes for safety analysis under the Technical Cooperation Programme on Safety of WWER Type Reactors (RER/9/004) and other experts throughout the world. A separate abstract was prepared for each of the 22 selected papers. Refs, figs tabs and pictures

  13. Computer-aided system design

    Science.gov (United States)

    Walker, Carrie K.

    1991-01-01

    A technique has been developed for combining features of a systems architecture design and assessment tool and a software development tool. This technique reduces simulation development time and expands simulation detail. The Architecture Design and Assessment System (ADAS), developed at the Research Triangle Institute, is a set of computer-assisted engineering tools for the design and analysis of computer systems. The ADAS system is based on directed graph concepts and supports the synthesis and analysis of software algorithms mapped to candidate hardware implementations. Greater simulation detail is provided by the ADAS functional simulator. With the functional simulator, programs written in either Ada or C can be used to provide a detailed description of graph nodes. A Computer-Aided Software Engineering tool developed at the Charles Stark Draper Laboratory (CSDL CASE) automatically generates Ada or C code from engineering block diagram specifications designed with an interactive graphical interface. A technique to use the tools together has been developed, which further automates the design process.

  14. Computer Aided Battery Engineering Consortium

    Energy Technology Data Exchange (ETDEWEB)

    Pesaran, Ahmad

    2016-06-07

    A multi-national lab collaborative team was assembled that includes experts from academia and industry to enhance recently developed Computer-Aided Battery Engineering for Electric Drive Vehicles (CAEBAT)-II battery crush modeling tools and to develop microstructure models for electrode design - both computationally efficient. Task 1. The new Multi-Scale Multi-Domain model framework (GH-MSMD) provides 100x to 1,000x computation speed-up in battery electrochemical/thermal simulation while retaining modularity of particles and electrode-, cell-, and pack-level domains. The increased speed enables direct use of the full model in parameter identification. Task 2. Mechanical-electrochemical-thermal (MECT) models for mechanical abuse simulation were simultaneously coupled, enabling simultaneous modeling of electrochemical reactions during the short circuit, when necessary. The interactions between mechanical failure and battery cell performance were studied, and the flexibility of the model for various batteries structures and loading conditions was improved. Model validation is ongoing to compare with test data from Sandia National Laboratories. The ABDT tool was established in ANSYS. Task 3. Microstructural modeling was conducted to enhance next-generation electrode designs. This 3- year project will validate models for a variety of electrodes, complementing Advanced Battery Research programs. Prototype tools have been developed for electrochemical simulation and geometric reconstruction.

  15. Computer aided fault tree synthesis

    International Nuclear Information System (INIS)

    Nuclear as well as non-nuclear organisations are showing during the past few years a growing interest in the field of reliability analysis. This urges for the development of powerful, state of the art methods and computer codes for performing such analysis on complex systems. In this report an interactive, computer aided approach is discussed, based on the well known fault tree technique. The time consuming and difficut task of manually constructing a system model (one or more fault trees) is replaced by an efficient interactive procedure in which the flexibility and the learning process inherent to the manual approach are combined with the accuracy in the modelling and the speed of the fully automatical approach. The method presented is based upon the use of a library containing component models. The possibility of setting up a standard library of models of general use and the link with a data collection system are discussed. The method has been implemented in the CAFTS-SALP software package which is described shortly in the report

  16. CAESY - COMPUTER AIDED ENGINEERING SYSTEM

    Science.gov (United States)

    Wette, M. R.

    1994-01-01

    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 research.att.com. 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.

  17. The computer aided education and training system for accident management

    International Nuclear Information System (INIS)

    Under severe accident conditions of a nuclear power plant, plant operators and technical support center (TSC) staffs will be under a amount of stress. Therefore, those individuals responsible for managing the plant should promote their understanding about the accident management and operations. Moreover, it is also important to train in ordinary times, so that they can carry out accident management operations effectively on severe accidents. Therefore, the education and training system which works on personal computers was developed by Japanese BWR group (Tokyo Electric Power Co.,Inc., Tohoku Electric Power Co. ,Inc., Chubu Electric Power Co. ,Inc., Hokuriku Electric Power Co.,Inc., Chugoku Electric Power Co.,Inc., Japan Atomic Power Co.,Inc.), and Hitachi, Ltd. The education and training system is composed of two systems. One is computer aided instruction (CAI) education system and the other is education and training system with a computer simulation. Both systems are designed to execute on MS-Windows(R) platform of personal computers. These systems provide plant operators and technical support center staffs with an effective education and training tool for accident management. TEPCO used the simulation system for the emergency exercise assuming the occurrence of hypothetical severe accident, and have performed an effective exercise in March, 2000. (author)

  18. CAT -- computer aided testing for resonant inspection

    International Nuclear Information System (INIS)

    Application of computer technology relates to inspection and quality control. The computer aided testing (CAT) can be used to analyze various NDT technologies, such as eddy current, ultrasonics, and resonant inspection

  19. Computer Aided Design in Engineering Education.

    Science.gov (United States)

    Gobin, R.

    1986-01-01

    Discusses the use of Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM) systems in an undergraduate engineering education program. Provides a rationale for CAD/CAM use in the already existing engineering program. Describes the methods used in choosing the systems, some initial results, and warnings for first-time users. (TW)

  20. Web Pages: An Effective Method of Providing CAI Resource Material in Histology.

    Science.gov (United States)

    McLean, Michelle

    2001-01-01

    Presents research that introduces computer-aided instruction (CAI) resource material as an integral part of the second-year histology course at the University of Natal Medical School. Describes the ease with which this software can be developed, using limited resources and available skills, while providing students with valuable learning…

  1. Computer-aided design and computer science technology

    Science.gov (United States)

    Fulton, R. E.; Voigt, S. J.

    1976-01-01

    A description is presented of computer-aided design requirements and the resulting computer science advances needed to support aerospace design. The aerospace design environment is examined, taking into account problems of data handling and aspects of computer hardware and software. The interactive terminal is normally the primary interface between the computer system and the engineering designer. Attention is given to user aids, interactive design, interactive computations, the characteristics of design information, data management requirements, hardware advancements, and computer science developments.

  2. Computer Aided Control System Design (CACSD)

    Science.gov (United States)

    Stoner, Frank T.

    1993-01-01

    The design of modern aerospace systems relies on the efficient utilization of computational resources and the availability of computational tools to provide accurate system modeling. This research focuses on the development of a computer aided control system design application which provides a full range of stability analysis and control design capabilities for aerospace vehicles.

  3. Purchasing Computer-Aided Design Software.

    Science.gov (United States)

    Smith, Roger A.

    1992-01-01

    Presents a model for the purchase of computer-aided design (CAD) software: collect general information, observe CAD in use, arrange onsite demonstrations, select CAD software and hardware, and choose a vendor. (JOW)

  4. Remote handling prospects. Computer aided remote handling

    International Nuclear Information System (INIS)

    Mechanical manipulators, electrical control manipulators and computer aided manipulators were successively developed. The aim of computer aided manipulators is the realization of complex or tricky job in adverse environment but man is required for non routine work or for situation in evolution. French effort is developed in the frame of the project automation and advanced robotics and new problems have to be solved particularly at the interface man/machine

  5. Computer aided diagnosis of bone tumours

    International Nuclear Information System (INIS)

    Four radiologists, three of whom having no special expertise in bone tumour radiology, analysed 177 bone tumours. One of the radiologists, using a computer aided bone tumour program, performed significantly better than the other two at a comparable level of training and was able to compete successfully with the fourth radiologist experienced in bone diagnosis. The results validate the assumption that computer aided diagnostic programs may improve the diagnostic accuracy of radiologists having limited experience with the problem at hand. (Auth.)

  6. Computer-Aided Design for Electron Microscopy

    Czech Academy of Sciences Publication Activity Database

    Lencová, Bohumila

    2004-01-01

    Roč. 6, č. 1 (2004), s. 51-53. ISSN 1439-4243 Institutional research plan: CEZ:AV0Z2065902 Keywords : magnetic electron lenses * accuracy of computation * computer - aided design Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

  7. Computer Aided Solvent Selection and Design Framework

    DEFF Research Database (Denmark)

    Mitrofanov, Igor; Conte, Elisa; Abildskov, Jens;

    computer-aided tools and methods for property prediction and computer-aided molecular design (CAMD) principles. This framework is applicable for solvent selection and design in product design as well as process design. The first module of the framework is dedicated to the solvent selection and design for...... in terms of: physical and chemical properties (solvent-pure properties); Environment, Health and Safety (EHS) characteristic (solvent-EHS properties); operational properties (solvent–solute properties). 3. Performing the search. The search step consists of two stages. The first is a generation and...... property identification of solvent candidates using special software ProCAMD and ProPred, which are the implementations of computer-aided molecular techniques. The second consists of assigning the RS-indices following the reaction–solvent and then consulting the known solvent database and identifying the...

  8. Computer aided training system development

    International Nuclear Information System (INIS)

    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

  9. Computer-Aided Modelling Methods and Tools

    DEFF Research Database (Denmark)

    Cameron, Ian; Gani, Rafiqul

    2011-01-01

    The development of models for a range of applications requires methods and tools. In many cases a reference model is required that allows the generation of application specific models that are fit for purpose. There are a range of computer aided modelling tools available that help to define the...... shows a taxonomy of aspects around conservation, constraints and constitutive relations. Aspects of the ICAS-MoT toolbox are given to illustrate the functionality of a computer aided modelling tool, which incorporates an interface to MS Excel....

  10. CATNET, Computer Aided Thermalhydraulic Network

    International Nuclear Information System (INIS)

    Thermalhydraulic networks are usually one-D systems characterized by a relatively small number of fundamental components (pumps, valves, heat exchanger, etc.) connected by pipes and limited spatially by a defined number of boundary conditions (tanks, atmosphere, etc.). In the present application the network system has been simulated by the well known computer program RELAP5/mod3. Information concerning the network geometry, components behavior, initial and boundary conditions are usually supplied to the RELAP5 code using an ASCII input file by means of 'input cards'. CATNET is a graphical user interface that, under specific user guidelines which completely define its range of applicability, permits a very high level of standardization and simplification of the RELAP5/mod3 input deck development process as well as the output processing. The characteristics of the components (pipes, valves, pumps, etc.) defining the network system can be entered through CATNET. The CATNET interface is provided by special functions to compute form losses in the most typical bending and branching configurations. When the input of all system components is ready, CATNET is able to generate the RELAP5/mod3 input file. Finally, by means of CATNET, the RELAP5/mod3 code can be run and its output results can be transformed to an intuitive display for using the chosen measurement units. (authors)

  11. NIHON-SEI : COMPUTER-AIDED INSTRUCTION THAT TEACHES BASIC JAPANESE

    Directory of Open Access Journals (Sweden)

    Daryl L. Montalbo

    2014-06-01

    Full Text Available This study examines which media incorporated in a developed Computer-Aided Instruction (CAI will be useful for the students taking up Nihongo classes. The CAI program was developed using a tutorial mode of presentation covering basic greetings, sentence patterns, number systems and hiragana characters. Each of these topics will have the following media in the flash lectures: text only, text-graphics, text-graphics-sounds and text-graphics-animation-sounds. Students in class were divided into four groups: the first group used text only media; the second group used text-graphics; the third group used text, graphics and sound; and the last group used text, graphics, sounds and animation. Examination was administered at the end of every lesson. ANOVA was used to determine the significant difference in the performance of students using different types of media. From the four media types of Flash lessons embedded in the system, the most effective media were text with graphics, sounds, and animation. Animations with the right text, graphics and sounds are a useful aid in making lessons meaningful for students.

  12. Computer-Aided Solvent Screening for Biocatalysis

    DEFF Research Database (Denmark)

    Abildskov, Jens; Leeuwen, M.B. van; Boeriu, C.G.;

    2013-01-01

    constrained properties related to chemical reaction equilibrium, substrate and product solubility, water solubility, boiling points, toxicity and others. Two examples are provided, covering the screening of solvents for lipase-catalyzed transesterification of octanol and inulin with vinyl laurate......A computer-aided solvent screening methodology is described and tested for biocatalytic systems composed of enzyme, essential water and substrates/products dissolved in a solvent medium, without cells. The methodology is computationally simple, using group contribution methods for calculating...

  13. Computer aided detection (CAD): an overview

    OpenAIRE

    Castellino, Ronald A.

    2005-01-01

    Computer aided detection (CAD) is a technology designed to decrease observational oversights—and thus the false negative rates—of physicians interpreting medical images. Prospective clinical studies have demonstrated an increase in breast cancer detection with CAD assistance. This overview briefly describes the metrics that have been used to define CAD system performance.

  14. Logic modelling in computer-aided design

    OpenAIRE

    Bijl, A.

    1986-01-01

    Research into a generalized logic modelling system linked to machine interpretation of drawings and text is described. This work is related to a view of design and builds on experience of working integrated design systems. Questions are posed for future computer-aided design systems.

  15. Scaled Ellipses For Computer-Aided Design

    Science.gov (United States)

    Schembri, Anthony J.

    1990-01-01

    An addition to CAD-PACK, computer-aided design program, speeds preparation of iosmetric drawings, particularly cutaway views showing bores and threads. Consists of set of 50 scaled ellipses on detail pages of program. Designer selects ellipse, rotates it, and draws feature. Then erases reference lines on video screen.

  16. COMPUTER AIDED DESIGN OF DIFFUSED AERATION SYSTEMS

    Science.gov (United States)

    CADDAS (Computer Aided Design of Diffused Aeration Systems) is a microcomputer-based program that analyzes the cost and performance of diffused aeration used in activated sludge wastewater treatment systems. The program can analyze both coarse bubble and fine pore diffusers as we...

  17. Teaching Computer Aided Architectural Design at UCLA.

    Science.gov (United States)

    Mitchell, William J.

    This brief overview includes a rationale for the program and describes course goals and objectives, curriculum content, teaching methods and materials, staffing, and problems of integrating computer aided design with traditional architectural curricula at the School of Architecture and Urban Planning at UCLA. A list of texts for use in teaching…

  18. Computer-Aided Corrosion Program Management

    Science.gov (United States)

    MacDowell, Louis

    2010-01-01

    This viewgraph presentation reviews Computer-Aided Corrosion Program Management at John F. Kennedy Space Center. The contents include: 1) Corrosion at the Kennedy Space Center (KSC); 2) Requirements and Objectives; 3) Program Description, Background and History; 4) Approach and Implementation; 5) Challenges; 6) Lessons Learned; 7) Successes and Benefits; and 8) Summary and Conclusions.

  19. Computer Aided Continuous Time Stochastic Process Modelling

    DEFF Research Database (Denmark)

    Kristensen, N.R.; Madsen, Henrik; Jørgensen, Sten Bay

    2001-01-01

    A grey-box approach to process modelling that combines deterministic and stochastic modelling is advocated for identification of models for model-based control of batch and semi-batch processes. A computer-aided tool designed for supporting decision-making within the corresponding modelling cycle...

  20. Computer Aided Learning of Mathematics: Software Evaluation

    Science.gov (United States)

    Yushau, B.; Bokhari, M. A.; Wessels, D. C. J.

    2004-01-01

    Computer Aided Learning of Mathematics (CALM) has been in use for some time in the Prep-Year Mathematics Program at King Fahd University of Petroleum & Minerals. Different kinds of software (both locally designed and imported) have been used in the quest of optimizing the recitation/problem session hour of the mathematics classes. This paper…

  1. Computer aided pantograph design for garment panels

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Discusses the difficulties and problems with manual pantograph ofgarment panels, introduces several typical pantographic ways and their characteristics both at home and abroad, presents a new pantographic method based on similar figures developed to overcome the deficiency of those methods, so as to realize computer aid automatic panel pantograph.

  2. A rule based computer aided design system

    Science.gov (United States)

    Premack, T.

    1986-01-01

    A Computer Aided Design (CAD) system is presented which supports the iterative process of design, the dimensional continuity between mating parts, and the hierarchical structure of the parts in their assembled configuration. Prolog, an interactive logic programming language, is used to represent and interpret the data base. The solid geometry representing the parts is defined in parameterized form using the swept volume method. The system is demonstrated with a design of a spring piston.

  3. Computer-aided dispatching system design specification

    International Nuclear Information System (INIS)

    This document defines the performance requirements for a graphic display dispatching system to support Hanford Patrol Operations Center. This document reflects the as-built requirements for the system that was delivered by GTE Northwest, Inc. This system provided a commercial off-the-shelf computer-aided dispatching system and alarm monitoring system currently in operations at the Hanford Patrol Operations Center, Building 2721E. This system also provides alarm back-up capability for the Plutonium Finishing Plant (PFP)

  4. Computer-Aided Business Model Design

    OpenAIRE

    Fritscher B.

    2014-01-01

    There is a lack of dedicated tools for business model design at a strategic level. However, in today's economic world the need to be able to quickly reinvent a company's business model is essential to stay competitive. This research focused on identifying the functionalities that are necessary in a computer-aided design (CAD) tool for the design of business models in a strategic context. Using design science research methodology a series of techniques and prototypes have been designed and eva...

  5. Computer-aided dispatching system design specification

    Energy Technology Data Exchange (ETDEWEB)

    Briggs, M.G.

    1997-12-16

    This document defines the performance requirements for a graphic display dispatching system to support Hanford Patrol Operations Center. This document reflects the as-built requirements for the system that was delivered by GTE Northwest, Inc. This system provided a commercial off-the-shelf computer-aided dispatching system and alarm monitoring system currently in operations at the Hanford Patrol Operations Center, Building 2721E. This system also provides alarm back-up capability for the Plutonium Finishing Plant (PFP).

  6. Computer Aided Series Expansions for Critical Phenomena

    CERN Document Server

    Meyer-Ortmanns, H; Meyer-Ortmanns, Hildegard; Reisz, Thomas

    1996-01-01

    Under quite general conditions critical phenomena can be described with high order linked cluster expansions. The coefficients of the series admit a graphical expansion that is generated with the aid of computers. Our generalization of linked cluster expansions from an infinite to a finite volume allows to perform a finite size scaling analysis. We also indicate a generalization to Dynamical Linked Cluster Expansions with possible applications to spin glasses and neural networks with coupled spin and interaction dynamics.

  7. Computer aided nonlinear electrical networks analysis

    Science.gov (United States)

    Slapnicar, P.

    1977-01-01

    Techniques used in simulating an electrical circuit with nonlinear elements for use in computer-aided circuit analysis programs are described. Elements of the circuit include capacitors, resistors, inductors, transistors, diodes, and voltage and current sources (constant or time varying). Simulation features are discussed for dc, ac, and/or transient circuit analysis. Calculations are based on the model approach of formulating the circuit equations. A particular solution of transient analysis for nonlinear storage elements is described.

  8. Computer aided planning for orthognatic surgery

    CERN Document Server

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

    2002-01-01

    A computer aided maxillofacial sequence is presented, applied to orthognatic surgery. It consists of 5 main stages: data acquisition and integration, surgical planning, surgical simulation, and per operative assistance. The planning and simulation steps are then addressed in a way that is clinically relevant. First concepts toward a 3D cephalometry are presented for a morphological analysis, surgical planning, and bone and soft tissue simulation. The aesthetic surgical outcomes of bone repositioning are studied with a biomechanical Finite Element soft tissue model.

  9. Computer-aided power systems analysis

    CERN Document Server

    Kusic, George

    2008-01-01

    Computer applications yield more insight into system behavior than is possible by using hand calculations on system elements. Computer-Aided Power Systems Analysis: Second Edition is a state-of-the-art presentation of basic principles and software for power systems in steady-state operation. Originally published in 1985, this revised edition explores power systems from the point of view of the central control facility. It covers the elements of transmission networks, bus reference frame, network fault and contingency calculations, power flow on transmission networks, generator base power setti

  10. ANALYSIS OF INTEGRATED COMPUTER AIDED DESIGN SYSTEMS FOR CONSTRUCTION OBJECTS

    OpenAIRE

    Pavlov Aleksandr Sergeevich; Lavdansky Pavel Aleksandrovich; Ignatiev Oleg Vladimirovich

    2012-01-01

    The paper contains classification of construction computer aided design systems, requirements to the single file format, providing their interaction within the frames of creation of integrated computer aided design systems, main principles and data transformation schemes are given.

  11. Integrated computer-aided design using minicomputers

    Science.gov (United States)

    Storaasli, O. O.

    1980-01-01

    Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM), a highly interactive software, has been implemented on minicomputers at the NASA Langley Research Center. CAD/CAM software integrates many formerly fragmented programs and procedures into one cohesive system; it also includes finite element modeling and analysis, and has been interfaced via a computer network to a relational data base management system and offline plotting devices on mainframe computers. The CAD/CAM software system requires interactive graphics terminals operating at a minimum of 4800 bits/sec transfer rate to a computer. The system is portable and introduces 'interactive graphics', which permits the creation and modification of models interactively. The CAD/CAM system has already produced designs for a large area space platform, a national transonic facility fan blade, and a laminar flow control wind tunnel model. Besides the design/drafting element analysis capability, CAD/CAM provides options to produce an automatic program tooling code to drive a numerically controlled (N/C) machine. Reductions in time for design, engineering, drawing, finite element modeling, and N/C machining will benefit productivity through reduced costs, fewer errors, and a wider range of configuration.

  12. Computer aided system engineering for space construction

    Science.gov (United States)

    Racheli, Ugo

    1989-01-01

    This viewgraph presentation covers the following topics. Construction activities envisioned for the assembly of large platforms in space (as well as interplanetary spacecraft and bases on extraterrestrial surfaces) require computational tools that exceed the capability of conventional construction management programs. The Center for Space Construction is investigating the requirements for new computational tools and, at the same time, suggesting the expansion of graduate and undergraduate curricula to include proficiency in Computer Aided Engineering (CAE) though design courses and individual or team projects in advanced space systems design. In the center's research, special emphasis is placed on problems of constructability and of the interruptability of planned activity sequences to be carried out by crews operating under hostile environmental conditions. The departure point for the planned work is the acquisition of the MCAE I-DEAS software, developed by the Structural Dynamics Research Corporation (SDRC), and its expansion to the level of capability denoted by the acronym IDEAS**2 currently used for configuration maintenance on Space Station Freedom. In addition to improving proficiency in the use of I-DEAS and IDEAS**2, it is contemplated that new software modules will be developed to expand the architecture of IDEAS**2. Such modules will deal with those analyses that require the integration of a space platform's configuration with a breakdown of planned construction activities and with a failure modes analysis to support computer aided system engineering (CASE) applied to space construction.

  13. Computer-aided diagnosis of genodermatoses.

    Science.gov (United States)

    Aksungur, Varol Lütfü; Marakli, Selma Sönmezoğlu; Akman, Ayşe; Homan, Seydo

    2004-02-01

    Genodermatoses are not usually easily diagnosed by inexperienced physicians. We developed a computer program to aid their clinical diagnoses and compared its accuracy rate to those of five residents in dermatology. The database of the program contained the clinical findings of 100 genodermatoses. Findings related to the skin, its appendages, mucous membranes and physiognomy were recorded in detail; but the involvements of other organs, only as headings. Twenty test cases were prepared from previously published reports. Their clinical findings were evaluated both by the program and five residents, who were at the end of the third year of their training in dermatology. The program gave the correct diagnosis in all of the test cases, but the residents failed to do so in one to seven cases. The high accuracy rate of the program suggests that it can aid inexperienced physicians in their clinical diagnosis of genodermatoses. PMID:15160860

  14. 電腦輔助教學與個別教學結合: 電腦輔助教學課堂應用初探 Computer-Assisted Instruction Under the Management of Individualized Instruction: A Classroom Management Approach of CAI

    Directory of Open Access Journals (Sweden)

    Sunny S. J. Lin

    1988-03-01

    Full Text Available 無First reviews the development of Computer. Assisted Instruction (CAI in Taiwan. This study describes the training of teachers from different levels of schools to design CAI coursewares, and the planning of CAI courseware bank possesses 2,000 supplemental coursewares. Some CAI's c1assroom application system should be carefully established to prevent the easy abuse of a CAI courseware as an instructional plan. The study also claims to steer CAI in our elemantary and secondary education could rely on the mastery learning as the instructional plan. In this case, CAI must limit its role as the formative test and remedial material only. In the higher education , the Keller's Personalized System of Instruction could be an effective c1assroom management system. Therefore, CAI will offer study guide and formative test only. Using these 2 instructional system may enhance student's achievement , and speed up the learning rate at the same time. Combining with individualized instruction and CAI will be one of the most workable approach in current c1assroom . The author sets up an experiment 10 varify their effectiveness and efficiency in the near future.

  15. Computer-Aided Simulation of Mastoidectomy

    Institute of Scientific and Technical Information of China (English)

    CHEN He-xin; MA Zhi-chao; Wang Zhang-feng; GUO Jie-bo; WEN Wei-ping; XU Geng

    2008-01-01

    Objective To establish a three-dimensional model of the temporal bone using CT scan images for study of temporal bone structures and simulation of mastoidectomy procedures. Methods CT scan images from 6 individuals (12 temporal bones) were used to reconstruct the Fallopian canal, internal auditory canal, cochlea, semicircular canals, sigmoid sinus, posterior fossa floor and jugular bulb on a computer platform. Their anatomical relations within the temporal bone were restored in the computed model. The same model was used to simulate mastoidectomy procedures. Results The reconstructed computer model provided accurate and clear three-dimensional images of temporal bone structures. Simulation of mastoidectomy using these images provided procedural experiences closely mimicking the real surgical procedure. Conclusion Computeraided three dimensional reconstruction of temporal bone structures using CT scan images is a useful tool in surgical simulation and can aid surgical procedure planning.

  16. A study on VR-based mutual adaptive CAI system for nuclear power plant

    International Nuclear Information System (INIS)

    A novel framework of human-computer-interaction for computer aided instruction (CAI) system is presented which aims at introducing a new off-the-job training environment to master nuclear power plant monitoring skill by more user-friendly manner than by present. The framework is based on the following two new ideas: one is mutual adaptive interface (MADI) concept, and the other is virtual realty (VR). In order to realize a hardware mechanism of mutual adaptive interface based on VR, a new head-mounted-display (HMD) was developed which can not only provide the user with virtual environment conventionally but also detect the user's eyes images for in-situ analysis of various ocular information. The information are expected to utilize for realizing advanced human-computer-interaction in the CAI system

  17. Genetic algorithms in computer aided inductor design

    Directory of Open Access Journals (Sweden)

    Jean Fivaz

    2004-09-01

    Full Text Available The goal of this investigation is to determine the advantages of using genetic algorithms in computer-aided design as applied to inductors.  These advantages are exploited in design problems with a number of specifications and constraints, as encountered in power electronics during practical inductor design. The design tool should be able to select components, such as cores and wires, from databases of available components, and evaluate these choices based on the components’ characteristic data read from a database of manufacturers’ data-sheets.  The proposed design must always be practically realizable, as close to the desired specifications as possible and within any specified constraints.

  18. Arabic Speech Pathology Therapy Computer Aided System

    Directory of Open Access Journals (Sweden)

    Z. A. Benselama

    2007-01-01

    Full Text Available This article concerns a computer aided pathological speech therapy program, based on speech models such as the hidden Markov model and artificial intelligence networks, in order to help persons, suffering from language pathologies, follow a correction learning process, with different interactive feedbacks, aiming to evaluate the degree of evolution of the illness or the therapy. We dealt with the Arabic occlusive sigmatism as a prime approach, which is the inability to pronounce the[s] or [∫]. Results obtained are satisfying and the therapy program is prepared, for autonomous use by patients, for deep analysis and verifications.

  19. Computer-aided control system design

    International Nuclear Information System (INIS)

    Control systems are typically implemented using conventional PID controllers, which are then tuned manually during plant commissioning to compensate for interactions between feedback loops. As plants increase in size and complexity, such controllers can fail to provide adequate process regulations. Multivariable methods can be utilized to overcome these limitations. At the Chalk River Nuclear Laboratories, modern control systems are designed and analyzed with the aid of MVPACK, a system of computer programs that appears to the user like a high-level calculator. The software package solves complicated control problems, and provides useful insight into the dynamic response and stability of multivariable systems

  20. Speech-enabled Computer-aided Translation

    DEFF Research Database (Denmark)

    Mesa-Lao, Bartolomé

    2014-01-01

    The present study has surveyed post-editor trainees’ views and attitudes before and after the introduction of speech technology as a front end to a computer-aided translation workbench. The aim of the survey was (i) to identify attitudes and perceptions among post-editor trainees before performing...... a post-editing task using automatic speech recognition (ASR); and (ii) to assess the degree to which post-editors’ attitudes and expectations to the use of speech technology changed after actually using it. The survey was based on two questionnaires: the first one administered before the...

  1. Computer training aids for nuclear operator training

    International Nuclear Information System (INIS)

    The Royal Navy's Nuclear Propulsion School at HMS SULTAN which is responsible for training all ratings and officers who operate Submarine Pressurised Water Reactor plants, has available a varied selection of classroom simulator training aids as well as purpose built Submarine Manoeuvring Room simulators. The use of these classroom training aids in the twelve months prior to Autumn 1981 is discussed. The advantages and disadvantages of using relatively expensive computer based aids to support classroom instruction for students who do not investigate mathematically the dynamics of the Reactor Plant are identified. The conclusions drawn indicate that for students of limited academic ability the classroom simulators are disproportionately expensive in cost, maintenance load, and instructional time. Secondly, the experience gained in the use of the Manoeuvring Room Simulators to train future operators who have just finished the academic phase of their training is outlined. The possible pitfalls for the instructor are discussed and the lessons learnt, concluding that these simulators provide a valuable substitute for the live plant enabling trainees to be brought up to a common standard and reducing their on job training time to an acceptable level. (author)

  2. Computer Aided Design Modeling for Heterogeneous Objects

    Directory of Open Access Journals (Sweden)

    Vikas Gupta

    2010-03-01

    Full Text Available Heterogeneous object design is an active research area in recent years. The conventional CAD modeling approaches only provide geometry and topology of the object, but do not contain any information with regard to the materials of the object and so can not be used for the fabrication of heterogeneous objects (HO through rapid prototyping. Current research focuses on computer-aided design issues in heterogeneous object design. A new CAD modeling approach is proposed to integrate the material information into geometric regions thus model the material distributions in the heterogeneous object. The gradient references are used to represent the complex geometry heterogeneous objects which have simultaneous geometry intricacies and accurate material distributions. The gradient references helps in flexible manipulability and control to heterogeneous objects, which guarantees the local control over gradient regions of developed heterogeneous objects. A systematic approach on data flow, processing, computer visualization, and slicing of heterogeneous objects for rapid prototyping is also presented.

  3. Computer Aided Design Modeling for Heterogeneous Objects

    CERN Document Server

    Gupta, Vikas; Tandon, Puneet

    2010-01-01

    Heterogeneous object design is an active research area in recent years. The conventional CAD modeling approaches only provide geometry and topology of the object, but do not contain any information with regard to the materials of the object and so can not be used for the fabrication of heterogeneous objects (HO) through rapid prototyping. Current research focuses on computer-aided design issues in heterogeneous object design. A new CAD modeling approach is proposed to integrate the material information into geometric regions thus model the material distributions in the heterogeneous object. The gradient references are used to represent the complex geometry heterogeneous objects which have simultaneous geometry intricacies and accurate material distributions. The gradient references helps in flexible manipulability and control to heterogeneous objects, which guarantees the local control over gradient regions of developed heterogeneous objects. A systematic approach on data flow, processing, computer visualizat...

  4. The Relevance of AI Research to CAI.

    Science.gov (United States)

    Kearsley, Greg P.

    This article provides a tutorial introduction to Artificial Intelligence (AI) research for those involved in Computer Assisted Instruction (CAI). The general theme is that much of the current work in AI, particularly in the areas of natural language understanding systems, rule induction, programming languages, and socratic systems, has important…

  5. Architectural design exposed: from computer-aided drawing to computer-aided design

    OpenAIRE

    RUFFLE, S

    1986-01-01

    Computer programs for architects and designers still do not 'understand' very much about what they are modelling or representing. In this paper the argument is put forward that as computer-aided design systems show increasing intelligence by employing data structures that more closely represent the way buildings go together, designers will find that they are relieved of manual tasks of representing the building design. This will be achieved by some restriction on the range of possible buildin...

  6. Natural gas diffusion model and diffusion computation in well Cai25 Bashan Group oil and gas reservoir

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Natural gas diffusion through the cap rock is mainly by means ofdissolving in water, so its concentration can be replaced by solubility, which varies with temperature, pressure and salinity in strata. Under certain geological conditions the maximal solubility is definite, so the diffusion com-putation can be handled approximately by stable state equation. Furthermore, on the basis of the restoration of the paleo-buried history, the diffusion is calculated with the dynamic method, and the result is very close to the real diffusion value in the geological history.

  7. Computer Aided Diagnosis in Digital Mammography

    Directory of Open Access Journals (Sweden)

    "H. Mirzaalian

    2005-08-01

    Full Text Available Introduction & Background: Breast cancer is a lead-ing cause of cancer deaths among women.Early de-tection is the most effective way to reduce mortality. Mammography is the best method for early detection. In order to improve the accuracy of interpretation of mammogram, Computer Aided Diagnosis (CAD sys-tems have been proposed. The main goal of this re-search is to implement one of the algorithms and techniques for the enhancement of mammogram for easier detection of abnormalities. Patients & Methods: In the presented algorithm, morphological methods are used first for removing artifacts. Then thresholding, labeling, and active con-tours methods are used to extract the breast region, which allow the search for abnormalities to be lim-ited to the region of the breast. Finally, Gaussian fil-ter and White Top Hat Transform is used for contrast enhancement of mammogram. This algorithm has been applied on 50 images from Mammography Im-age Analysis Society (MIAS. An expert radiologist then verified improvement on the processed images. Results and Conclusions: Implementing the presented algorithm causes easier and better interpretation of mammogram without increasing the number of false positive and false negative results. Because of the spe-cial shapes and statistical features of abnormal tex-tures, it is possible to apply pattern recognition and artificial intelligence techniques as an aid for diagnos-ing suspicious regions. Research on using some of these techniques to distinguish benign abnormalities from malignant ones is on the way.

  8. Computer aided diagnosis of diabetic peripheral neuropathy

    Science.gov (United States)

    Chekh, Viktor; Soliz, Peter; McGrew, Elizabeth; Barriga, Simon; Burge, Mark; Luan, Shuang

    2014-03-01

    Diabetic peripheral neuropathy (DPN) refers to the nerve damage that can occur in diabetes patients. It most often affects the extremities, such as the feet, and can lead to peripheral vascular disease, deformity, infection, ulceration, and even amputation. The key to managing diabetic foot is prevention and early detection. Unfortunately, current existing diagnostic techniques are mostly based on patient sensations and exhibit significant inter- and intra-observer differences. We have developed a computer aided diagnostic (CAD) system for diabetic peripheral neuropathy. The thermal response of the feet of diabetic patients following cold stimulus is captured using an infrared camera. The plantar foot in the images from a thermal video are segmented and registered for tracking points or specific regions. The temperature recovery of each point on the plantar foot is extracted using our bio-thermal model and analyzed. The regions that exhibit abnormal ability to recover are automatically identified to aid the physicians to recognize problematic areas. The key to our CAD system is the segmentation of infrared video. The main challenges for segmenting infrared video compared to normal digital video are (1) as the foot warms up, it also warms up the surrounding, creating an ever changing contrast; and (2) there may be significant motion during imaging. To overcome this, a hybrid segmentation algorithm was developed based on a number of techniques such as continuous max-flow, model based segmentation, shape preservation, convex hull, and temperature normalization. Verifications of the automatic segmentation and registration using manual segmentation and markers show good agreement.

  9. A computer-aided continuous assessment system

    Directory of Open Access Journals (Sweden)

    B. C.H. Turton

    1996-12-01

    Full Text Available Universities within the United Kingdom have had to cope with a massive expansion in undergraduate student numbers over the last five years (Committee of Scottish University Principals, 1993; CVCP Briefing Note, 1994. In addition, there has been a move towards modularization and a closer monitoring of a student's progress throughout the year. Since the price/performance ratio of computer systems has continued to improve, Computer- Assisted Learning (CAL has become an attractive option. (Fry, 1990; Benford et al, 1994; Laurillard et al, 1994. To this end, the Universities Funding Council (UFQ has funded the Teaching and Learning Technology Programme (TLTP. However universities also have a duty to assess as well as to teach. This paper describes a Computer-Aided Assessment (CAA system capable of assisting in grading students and providing feedback. In this particular case, a continuously assessed course (Low-Level Languages of over 100 students is considered. Typically, three man-days are required to mark one assessed piece of coursework from the students in this class. Any feedback on how the questions were dealt with by the student are of necessity brief. Most of the feedback is provided in a tutorial session that covers the pitfalls encountered by the majority of the students.

  10. COMPUTER AIDED DESIGN OF CUTTING TOOLS

    Directory of Open Access Journals (Sweden)

    Jakub Matuszak

    2015-11-01

    Full Text Available Correct and stable machining process requires an appropriate cutting tool. In most cases the tool can be selected by using special tool catalogs often available in online version. But in some cases there is a need to design unusual tools, for special treatment, which are not available in tool manufacturers’ catalogs. Proper tool design requires strength and geometric calculations. Moreover, in many cases specific technical documentation is required. By using Computer Aided Design of cutting tools this task can be carried out quickly and with high accuracy. Cutting tool visualization in CAD programs gives a clear overview of the design process. Besides, these programs provide the ability to simulate real machining process. Nowadays, 3D modeling in CAD programs is a fundamental tool for engineers. Therefore, it is important to use them in the education process.

  11. Computer Aided Modelling – Opportunities and Challenges

    DEFF Research Database (Denmark)

    Cameron, Ian; Gani, Rafiqul

    2011-01-01

    easily generate new models from underlying phenomena continues to be a challenge, especially in the face of time and cost constraints.Integrated frameworks that allow flexibility of model development and access to a range of embedded tools are central to future model developments. The challenges and......This chapter considers the opportunities that are present in developing, extending and applying aspects of computer-aided modelling principles and practice. What are the best tasks to be done by modellers and what needs the application of CAPE tools? How do we efficiently develop model......-based solutions to significant problems? The important issues of workflow and data flow are discussed together with fit-for-purpose model development. As well, the lack of tools around multiscale modelling provides opportunities for the development of efficient tools to address such challenges. The ability to...

  12. Computer-aided diagnosis in routine mammography

    International Nuclear Information System (INIS)

    Purpose: Computer-aided diagnosis in mammography is a topic many study groups have been concerned with since the first presentation of a system for computer-aided interpretation in 1967. Currently, there is only one system avilable for clinical use in mammography, the CAD-System Image Checker (R2 Technology). The purpose of our prospective study was to evaluate whether the integration of the CAD-system into the routine of a radiological breast diagnosis unit is feasible. Results: After the installation of the CAD-system, 300 patients with 1110 mammograms were included for evaluation in the present study. In 54 of these cases histological examination was indicated due to suspect criteria on conventional mammography. In 39 of 54 cases (72,2%) malignancy could be proven histologically. The CAD-system marked 82,1% of the histologically verified carcinomas correctly 94,3% of all 1797 marks made by the CAD-system indicated normal or benign structures. Routinely performed CAD analysis prolonged patients waiting time by about 15 min because the marks of the CAD system had to be interpreted in addition to the routine diagnostic investigations. Conclusion: Our experience with the use of the CAD-system in daily routine showed that CAD analysis can easily be integrated into a preexisting mammography unit. However, the diagnostic benefit is not yet clearly established. Since the rate of false negative marks by the CAD-system Image Checker is still high, the results of CAD analysis must be checked and corrected by an observer well experienced in mammography reading. (orig.)

  13. Intelligent Support for a Computer Aided Design Optimisation Cycle

    OpenAIRE

    B. Dolšak; Novak, M.; J. Kaljun

    2006-01-01

    It is becoming more and more evident that  adding intelligence  to existing computer aids, such as computer aided design systems, can lead to significant improvements in the effective and reliable performance of various engineering tasks, including design optimisation. This paper presents three different intelligent modules to be applied within a computer aided design optimisation cycle to enable more intelligent and less experience-dependent design performance. 

  14. Implementation of a tolerance model in a computer aided design and inspection system

    Directory of Open Access Journals (Sweden)

    R. Hunter

    2006-04-01

    Full Text Available Purpose: Purpose of this paper is present a detailed framework to integrate the Computer Aided Design (CAD and Inspection (CAI systems through the integration of the Geometric Dimensioning and Tolerancing (GD&T with the inspection process in coordinate measuring machines (CMMs.Design/methodology/approach: The approach used to develop a prototype of a Knowledge Based System (KBS applied to inspection process establishes a new methodology for integrate the geometric dimensioning and tolerancing (GD&T. The integration is achieved through the definition of the knowledge units for functional properties of GD&T, inspection resources and inspection operations in a common knowledge model. The manufacturing and processing applications are the main topics approach of this paper.Findings: The findings are focused in modeling the features and interactions between knowledge units associated to topology, geometry and tolerances with the inspection process activities. The implementation of the product knowledge model is presented in a computer platform that extracts and represents the GD&T information in a CAI system.Research limitations/implications: The implications are focused on the automation of the inspection process in a KBS application. The future research is focused on the use of artificial intelligent technique, such as genetic algorithms and neural networks, to optimize the time to execute the inspection process.Practical implications: The main outcomes and implication of the KBS prototype application are focused on the reduction of the time spend to develop the inspection process. This KBS application provides the needed information to elaborate this process without the human interface.Originality/value: The original value of this paper is the integration of the design and inspection specification in a unique prototype application. The knowledge model has been defined in a common modeling language (UML and can be implemented in different

  15. Computer Aided Aerodynamic Design of Missile Configuration

    Directory of Open Access Journals (Sweden)

    S. Panneerselvam

    1987-10-01

    Full Text Available Aerodynamic configurations of tactical missiles have to produce the required lateral force with minimum time lag to meet the required manoeuvability and response time. The present design which is mainly based on linearised potential flow involves (a indentification of critical design points, (b design of lifting components and their integration with mutual interference, (c evaluation of aerodynamic characteristics, (d checking its adequacy at otherpoints, (e optimization of parameters and selection of configuration, and (f detailed evaluation including aerodynamic pressure distribution. Iterative design process in involed because of the mutual dependance between aerodynamic charactertistics and the parameters of the configuration. though this design method is based on third level of approximation with respect to real flow, aid of computer is essential for carrying out the iterative design process and also for effective selection of configuration by analysing performance. Futuristic design requirement which demand better accuracy on design and estimation calls for sophisticated super computer based theoretical methods viz. , full Euler solution/Navier-Strokes solutions.

  16. Development of an intelligent CAI system for a distributed processing environment

    International Nuclear Information System (INIS)

    In order to operate a nuclear power plant optimally in both normal and abnormal situations, the operators are trained using an operator training simulator in addition to classroom instruction. Individual instruction using a CAI (Computer-Assisted Instruction) system has become popular as a method of learning plant information, such as plant dynamics, operational procedures, plant systems, plant facilities, etc. The outline is described of a proposed network-based intelligent CAI system (ICAI) incorporating multi-medial PWR plant dynamics simulation, teaching aids and educational record management using the following environment: existing standard workstations and graphic workstations with a live video processing function, TCP/IP protocol of Unix through Ethernet and X window system. (Z.S.) 3 figs., 2 refs

  17. Maxi CAI with a Micro.

    Science.gov (United States)

    Gerhold, George; And Others

    This paper describes an effective microprocessor-based CAI system which has been repeatedly tested by a large number of students and edited accordingly. Tasks not suitable for microprocessor based systems (authoring, testing, and debugging) were handled on larger multi-terminal systems. This approach requires that the CAI language used on the…

  18. Geometric modeling for computer aided design

    Science.gov (United States)

    Schwing, James L.; Olariu, Stephen

    1995-01-01

    The primary goal of this grant has been the design and implementation of software to be used in the conceptual design of aerospace vehicles particularly focused on the elements of geometric design, graphical user interfaces, and the interaction of the multitude of software typically used in this engineering environment. This has resulted in the development of several analysis packages and design studies. These include two major software systems currently used in the conceptual level design of aerospace vehicles. These tools are SMART, the Solid Modeling Aerospace Research Tool, and EASIE, the Environment for Software Integration and Execution. Additional software tools were designed and implemented to address the needs of the engineer working in the conceptual design environment. SMART provides conceptual designers with a rapid prototyping capability and several engineering analysis capabilities. In addition, SMART has a carefully engineered user interface that makes it easy to learn and use. Finally, a number of specialty characteristics have been built into SMART which allow it to be used efficiently as a front end geometry processor for other analysis packages. EASIE provides a set of interactive utilities that simplify the task of building and executing computer aided design systems consisting of diverse, stand-alone, analysis codes. Resulting in a streamlining of the exchange of data between programs reducing errors and improving the efficiency. EASIE provides both a methodology and a collection of software tools to ease the task of coordinating engineering design and analysis codes.

  19. Computer-Aided Parallelizer and Optimizer

    Science.gov (United States)

    Jin, Haoqiang

    2011-01-01

    The Computer-Aided Parallelizer and Optimizer (CAPO) automates the insertion of compiler directives (see figure) to facilitate parallel processing on Shared Memory Parallel (SMP) machines. While CAPO currently is integrated seamlessly into CAPTools (developed at the University of Greenwich, now marketed as ParaWise), CAPO was independently developed at Ames Research Center as one of the components for the Legacy Code Modernization (LCM) project. The current version takes serial FORTRAN programs, performs interprocedural data dependence analysis, and generates OpenMP directives. Due to the widely supported OpenMP standard, the generated OpenMP codes have the potential to run on a wide range of SMP machines. CAPO relies on accurate interprocedural data dependence information currently provided by CAPTools. Compiler directives are generated through identification of parallel loops in the outermost level, construction of parallel regions around parallel loops and optimization of parallel regions, and insertion of directives with automatic identification of private, reduction, induction, and shared variables. Attempts also have been made to identify potential pipeline parallelism (implemented with point-to-point synchronization). Although directives are generated automatically, user interaction with the tool is still important for producing good parallel codes. A comprehensive graphical user interface is included for users to interact with the parallelization process.

  20. Computer-aided diagnosis (CAD) for colonoscopy

    Science.gov (United States)

    Gu, Jia; Poirson, Allen

    2007-03-01

    Colorectal cancer is the second leading cause of cancer deaths, and ranks third for new cancer cases and cancer mortality for both men and women. However, its death rate can be dramatically reduced by appropriate treatment when early detection is available. The purpose of colonoscopy is to identify and assess the severity of lesions, which may be flat or protruding. Due to the subjective nature of the examination, colonoscopic proficiency is highly variable and dependent upon the colonoscopist's knowledge and experience. An automated image processing system providing an objective, rapid, and inexpensive analysis of video from a standard colonoscope could provide a valuable tool for screening and diagnosis. In this paper, we present the design, functionality and preliminary results of its Computer-Aided-Diagnosis (CAD) system for colonoscopy - ColonoCAD TM. ColonoCAD is a complex multi-sensor, multi-data and multi-algorithm image processing system, incorporating data management and visualization, video quality assessment and enhancement, calibration, multiple view based reconstruction, feature extraction and classification. As this is a new field in medical image processing, our hope is that this paper will provide the framework to encourage and facilitate collaboration and discussion between industry, academia, and medical practitioners.

  1. Software For Computer-Aided Design Of Control Systems

    Science.gov (United States)

    Wette, Matthew

    1994-01-01

    Computer Aided Engineering System (CAESY) software developed to provide means to evaluate methods for dealing with users' needs in computer-aided design of control systems. Interpreter program for performing engineering calculations. Incorporates features of both Ada and MATLAB. Designed to be flexible and powerful. Includes internally defined functions, procedures and provides for definition of functions and procedures by user. Written in C language.

  2. CAD/CAM (Computer Aided Design/Computer Aided Manufacture). A Brief Guide to Materials in the Library of Congress.

    Science.gov (United States)

    Havas, George D.

    This brief guide to materials in the Library of Congress (LC) on computer aided design and/or computer aided manufacturing lists reference materials and other information sources under 13 headings: (1) brief introductions; (2) LC subject headings used for such materials; (3) textbooks; (4) additional titles; (5) glossaries and handbooks; (6)…

  3. Single-tooth dento-osseous osteotomy with a computer-aided design/computer-aided manufacturing surgical guide

    Science.gov (United States)

    2016-01-01

    This clinical note introduces a method to assist surgeons in performing single-tooth dento-osseous osteotomy. For use in this method, a surgical guide was manufactured using computer-aided design/computer-aided manufacturing technology and was based on preoperative surgical simulation data. This method was highly conducive to successful single-tooth dento-osseous segmental osteotomy. PMID:27162756

  4. Computer-aided-diagnosis (CAD) for colposcopy

    Science.gov (United States)

    Lange, Holger; Ferris, Daron G.

    2005-04-01

    Uterine cervical cancer is the second most common cancer among women worldwide. Colposcopy is a diagnostic method, whereby a physician (colposcopist) visually inspects the lower genital tract (cervix, vulva and vagina), with special emphasis on the subjective appearance of metaplastic epithelium comprising the transformation zone on the cervix. Cervical cancer precursor lesions and invasive cancer exhibit certain distinctly abnormal morphologic features. Lesion characteristics such as margin; color or opacity; blood vessel caliber, intercapillary spacing and distribution; and contour are considered by colposcopists to derive a clinical diagnosis. Clinicians and academia have suggested and shown proof of concept that automated image analysis of cervical imagery can be used for cervical cancer screening and diagnosis, having the potential to have a direct impact on improving women"s health care and reducing associated costs. STI Medical Systems is developing a Computer-Aided-Diagnosis (CAD) system for colposcopy -- ColpoCAD. At the heart of ColpoCAD is a complex multi-sensor, multi-data and multi-feature image analysis system. A functional description is presented of the envisioned ColpoCAD system, broken down into: Modality Data Management System, Image Enhancement, Feature Extraction, Reference Database, and Diagnosis and directed Biopsies. The system design and development process of the image analysis system is outlined. The system design provides a modular and open architecture built on feature based processing. The core feature set includes the visual features used by colposcopists. This feature set can be extended to include new features introduced by new instrument technologies, like fluorescence and impedance, and any other plausible feature that can be extracted from the cervical data. Preliminary results of our research on detecting the three most important features: blood vessel structures, acetowhite regions and lesion margins are shown. As this is a new

  5. Evaluating computer-aided detection algorithms

    International Nuclear Information System (INIS)

    Computer-aided detection (CAD) has been attracting extensive research interest during the last two decades. It is recognized that the full potential of CAD can only be realized by improving the performance and robustness of CAD algorithms and this requires good evaluation methodology that would permit CAD designers to optimize their algorithms. Free-response receiver operating characteristic (FROC) curves are widely used to assess CAD performance, however, evaluation rarely proceeds beyond determination of lesion localization fraction (sensitivity) at an arbitrarily selected value of nonlesion localizations (false marks) per image. This work describes a FROC curve fitting procedure that uses a recent model of visual search that serves as a framework for the free-response task. A maximum likelihood procedure for estimating the parameters of the model from free-response data and fitting CAD generated FROC curves was implemented. Procedures were implemented to estimate two figures of merit and associated statistics such as 95% confidence intervals and goodness of fit. One of the figures of merit does not require the arbitrary specification of an operating point at which to evaluate CAD performance. For comparison a related method termed initial detection and candidate analysis was also implemented that is applicable when all suspicious regions are reported. The two methods were tested on seven mammography CAD data sets and both yielded good to excellent fits. The search model approach has the advantage that it can potentially be applied to radiologist generated free-response data where not all suspicious regions are reported, only the ones that are deemed sufficiently suspicious to warrant clinical follow-up. This work represents the first practical application of the search model to an important evaluation problem in diagnostic radiology. Software based on this work is expected to benefit CAD developers working in diverse areas of medical imaging

  6. Computer-aided design development transition for IPAD environment

    Science.gov (United States)

    Owens, H. G.; Mock, W. D.; Mitchell, J. C.

    1980-01-01

    The relationship of federally sponsored computer-aided design/computer-aided manufacturing (CAD/CAM) programs to the aircraft life cycle design process, an overview of NAAD'S CAD development program, an evaluation of the CAD design process, a discussion of the current computing environment within which NAAD is developing its CAD system, some of the advantages/disadvantages of the NAAD-IPAD approach, and CAD developments during transition into the IPAD system are discussed.

  7. PLAID- A COMPUTER AIDED DESIGN SYSTEM

    Science.gov (United States)

    Brown, J. W.

    1994-01-01

    PLAID is a three-dimensional Computer Aided Design (CAD) system which enables the user to interactively construct, manipulate, and display sets of highly complex geometric models. PLAID was initially developed by NASA to assist in the design of Space Shuttle crewstation panels, and the detection of payload object collisions. It has evolved into a more general program for convenient use in many engineering applications. Special effort was made to incorporate CAD techniques and features which minimize the users workload in designing and managing PLAID models. PLAID consists of three major modules: the Primitive Object Generator (BUILD), the Composite Object Generator (COG), and the DISPLAY Processor. The BUILD module provides a means of constructing simple geometric objects called primitives. The primitives are created from polygons which are defined either explicitly by vertex coordinates, or graphically by use of terminal crosshairs or a digitizer. Solid objects are constructed by combining, rotating, or translating the polygons. Corner rounding, hole punching, milling, and contouring are special features available in BUILD. The COG module hierarchically organizes and manipulates primitives and other previously defined COG objects to form complex assemblies. The composite object is constructed by applying transformations to simpler objects. The transformations which can be applied are scalings, rotations, and translations. These transformations may be defined explicitly or defined graphically using the interactive COG commands. The DISPLAY module enables the user to view COG assemblies from arbitrary viewpoints (inside or outside the object) both in wireframe and hidden line renderings. The PLAID projection of a three-dimensional object can be either orthographic or with perspective. A conflict analysis option enables detection of spatial conflicts or collisions. DISPLAY provides camera functions to simulate a view of the model through different lenses. Other

  8. Artificial Intelligence and Computer Assisted Instruction. CITE Report No. 4.

    Science.gov (United States)

    Elsom-Cook, Mark

    The purpose of the paper is to outline some of the major ways in which artificial intelligence research and techniques can affect usage of computers in an educational environment. The role of artificial intelligence is defined, and the difference between Computer Aided Instruction (CAI) and Intelligent Computer Aided Instruction (ICAI) is…

  9. Design Theory of Intellectualized Computer Aided Instruction and Its Applications

    Institute of Scientific and Technical Information of China (English)

    CUI Hong-bin; WANG Ai-min; YU Dong-mei

    2001-01-01

    This paper presents design theory and method of the intellectualized CAI. which includes the organization and expression of the teaching content and the teaching requirement determination in teaching process, and develops a highly intellectualized CA1 software. LA-CAI, to use for liner arithmetic teaching program.

  10. Development of Computer-Aided Thermal Procedures of Technical Objects

    OpenAIRE

    Farmaga Ihor Viroslavovych; Marikutsa Uliana Bohdanivna; Fabirovskyy Andriy

    2011-01-01

    The popularities of the development of design procedures and thermal design operations for the construction of a general structure of a computer-aided thermal design of technical objects with the aim of providing their thermophysical characteristics are described.

  11. School District Uses Computer Aided Design and Drafting.

    Science.gov (United States)

    Lorentz, Gordon S.

    1988-01-01

    Computer Aided Design and Drafting (CADD) programs are used to teach drafting at an Indiana high school. The school system's maintenance department shared use of the software and equipment to produce original drawings of school buildings. (MLF)

  12. DICOM standard in computer-aided medical technologies

    International Nuclear Information System (INIS)

    The paper outlines one of the promising standards to transmit images in medicine, in radiology in particular. the essence of the standard DICOM is disclosed and promises of its introduction into computer-aided medical technologies

  13. Computer Aided Design Tools for Extreme Environment Electronics Project

    Data.gov (United States)

    National Aeronautics and Space Administration — This project aims to provide Computer Aided Design (CAD) tools for radiation-tolerant, wide-temperature-range digital, analog, mixed-signal, and radio-frequency...

  14. Issues of a Computer-Aided Design of Hydraulic Jacks

    Science.gov (United States)

    Averchenkov, V. I.; Averchenkov, A. V.; Kolyakinand, V. V.; Orekhov, O. D.

    2016-04-01

    The article deals with the issues of a computer-aided design of hydraulic equipment, namely hydraulic jacks. Design principles of the hydraulic jack CAD system are described. In addition, the possibilities for the system improvement and expansion are considered.

  15. Application of genetic algorithm to computer-aided process

    OpenAIRE

    Amrinder Chahal

    2012-01-01

    Process planning is a task of transforming design specifications into manufacturing instructions. It is an engineering task that determinesthe detailed manufacturing requirements for transforminga raw material into a completed part, within the available machining resources. The output of process planning generally includes operations, machine tools, cutting tools, fixtures, machining parameters, etc. Computer-aided process planning (CAPP) is an important interface between computer-aided desig...

  16. A review of computer-aided design/computer-aided manufacture techniques for removable denture fabrication.

    Science.gov (United States)

    Bilgin, Mehmet Selim; Baytaroğlu, Ebru Nur; Erdem, Ali; Dilber, Erhan

    2016-01-01

    The aim of this review was to investigate usage of computer-aided design/computer-aided manufacture (CAD/CAM) such as milling and rapid prototyping (RP) technologies for removable denture fabrication. An electronic search was conducted in the PubMed/MEDLINE, ScienceDirect, Google Scholar, and Web of Science databases. Databases were searched from 1987 to 2014. The search was performed using a variety of keywords including CAD/CAM, complete/partial dentures, RP, rapid manufacturing, digitally designed, milled, computerized, and machined. The identified developments (in chronological order), techniques, advantages, and disadvantages of CAD/CAM and RP for removable denture fabrication are summarized. Using a variety of keywords and aiming to find the topic, 78 publications were initially searched. For the main topic, the abstract of these 78 articles were scanned, and 52 publications were selected for reading in detail. Full-text of these articles was gained and searched in detail. Totally, 40 articles that discussed the techniques, advantages, and disadvantages of CAD/CAM and RP for removable denture fabrication and the articles were incorporated in this review. Totally, 16 of the papers summarized in the table. Following review of all relevant publications, it can be concluded that current innovations and technological developments of CAD/CAM and RP allow the digitally planning and manufacturing of removable dentures from start to finish. As a result according to the literature review CAD/CAM techniques and supportive maxillomandibular relationship transfer devices are growing fast. In the close future, fabricating removable dentures will become medical informatics instead of needing a technical staff and procedures. However the methods have several limitations for now. PMID:27095912

  17. Computer aided pinhole collimating system based on dual laser theodolides

    International Nuclear Information System (INIS)

    A computer aided thick pinhole collimating system was developed for X-ray or Gamma ray pinhole imaging applications. This system consists of two laser theodolites and actuators, a digital video camera, a laptop computer and a specifically developed software package. Functions including aided focusing, aided light axis adjustment and parameter recording were implemented. Compared with single light axis method, this system can shorten the collimating adjustment time, and achieve better precision. It can also provide long-term reference axis. Data processing and alignment criterion were discussed. (authors)

  18. Assessment of Chair-side Computer-Aided Design and Computer-Aided Manufacturing Restorations: A Review of the Literature

    OpenAIRE

    Baroudi, Kusai; Ibraheem, Shukran Nasser

    2015-01-01

    Background: This paper aimed to evaluate the application of computer-aided design and computer-aided manufacturing (CAD-CAM) technology and the factors that affect the survival of restorations. Materials and Methods: A thorough literature search using PubMed, Medline, Embase, Science Direct, Wiley Online Library and Grey literature were performed from the year 2004 up to June 2014. Only relevant research was considered. Results: The use of chair-side CAD/CAM systems is promising in all dental...

  19. Computer-aided training and testing

    Directory of Open Access Journals (Sweden)

    А.В. Русаловський

    2007-03-01

    Full Text Available  A range of tasks related to increasing efficiency of learning process and testing by means of information technologies and automation of those processes come under review in this article. Efficiency of learning and testing using traditional methods vs. analogous methods utilizing personal computers is compared. It is stated that utilizing computer enables to eliminate certain shortcomings of traditional learning and testing methods. Basic technological steps of learning and testing associated with using “Auto-Examinator” computer-based learning, testing software package are reviewed. Conclusions on benefits of use of computer-based learning and testing software for both teachers and students are drawn.

  20. Interactive graphical computer-aided design system

    Science.gov (United States)

    Edge, T. M.

    1975-01-01

    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.

  1. Computer aid for information and medicine

    International Nuclear Information System (INIS)

    Recent meetings in Vienna have emphasized ways in which use of computers can assist work connected with nuclear techniques. Links have now been established to provide a world-wide service of information to reactor designers and physicists, and indications have been given of ways of using computers to ease the task of treating cancer patients

  2. Computer-aided engineering: the step beyond CAD/CAM

    Energy Technology Data Exchange (ETDEWEB)

    Hatfield, L.; Trost, S.R.; O' Brien, D.W.; Pomernacki, C.L.

    1981-11-06

    At Lawrence Livermore National Laboratory, the need for increased engineering productivity, coupled with increasingly difficult engineering problems, presents a significant challenge. Advances in computer technology coupled with successful CAD/CAM experiences suggest that computer-aided engineering (CAE) will help meet this challenge. Requirements for a CAE system are developed, a CAE system plan is outlined, and some remaining problem areas are discussed.

  3. Computer-aided hepatic tumour ablation

    CERN Document Server

    Voirin, D; Amavizca, M; Leroy, A; Letoublon, C; Troccaz, J; Voirin, David; Payan, Yohan; Amavizca, Miriam; Leroy, Antoine; Letoublon, Christian; Troccaz, Jocelyne

    2001-01-01

    Surgical resection of hepatic tumours is not always possible. Alternative techniques consist in locally using chemical or physical agents to destroy the tumour and this may be performed percutaneously. It requires a precise localisation of the tumour placement during ablation. Computer-assisted surgery tools may be used in conjunction to these new ablation techniques to improve the therapeutic efficiency whilst benefiting from minimal invasiveness. This communication introduces the principles of a system for computer-assisted hepatic tumour ablation.

  4. Computer-aided software development process design

    Science.gov (United States)

    Lin, Chi Y.; Levary, Reuven R.

    1989-01-01

    The authors describe an intelligent tool designed to aid managers of software development projects in planning, managing, and controlling the development process of medium- to large-scale software projects. Its purpose is to reduce uncertainties in the budget, personnel, and schedule planning of software development projects. It is based on dynamic model for the software development and maintenance life-cycle process. This dynamic process is composed of a number of time-varying, interacting developmental phases, each characterized by its intended functions and requirements. System dynamics is used as a modeling methodology. The resulting Software LIfe-Cycle Simulator (SLICS) and the hybrid expert simulation system of which it is a subsystem are described.

  5. Computer-aided design of electrical machines

    CERN Document Server

    Murthy, KM Vishnu

    2008-01-01

    The aim of this book is to present the sequential steps for developing the computer programs for the design of electrical machines, using well-established design formulae. The data of magnetic and non-magnetic materials used in latest designs by industries, is applied for optimizing the design. Salient Features: MATLAB Version of C Language is used for computer programming because of its easiness and simplicity over conventional C Program. The total program is split into a number of parts and each part is run independently. The total program for total design is obtained by adding the programs

  6. Computer aided design of spur gear teeth

    Science.gov (United States)

    Huston, R. L.; Mavriplis, D.; Oswald, F. B.

    1989-01-01

    Procedures for computer-modeling of spur gear tooth fabrication are given. It is shown that the standard involute tooth form results from a cutter with an involute shape rolling onto a gear blank. Specifically, the envelope of an involute is an involute. Examples are given and applications are discussed.

  7. Computer-Aided Design of Solid Catalysts

    Czech Academy of Sciences Publication Activity Database

    Holeňa, Martin; Baerns, M.

    Weinheim: Wiley, 2008 - (Ertl, G.; Knözinger, H.; Schüth, F.; Weitkamp, J.), s. 66-81 ISBN 978-3-527-31241-2 Institutional research plan: CEZ:AV0Z10300504 Keywords : combinatorial catalysis * design of experiments * catalyst optimization, * evolutionary methods * data analysis * artificial neural networks Subject RIV: IN - Informatics, Computer Science

  8. Computer Program Aids Design Of Impeller Blades

    Science.gov (United States)

    Chen, Wei-Chung; Galazin, John V.

    1992-01-01

    Impeller blades for centrifugal turbopumps designed quickly with help of computer program. Generates blade contours and continually subjects them to evaluation. Checks physical parameters to ensure they are compatible with required performance and recycles design if criteria not met. Program written for centrifugal turbomachinery, also adapted to such axial pump components as inducer blades and stator vanes.

  9. Computer-Aided Modeling of Lipid Processing Technology

    DEFF Research Database (Denmark)

    Diaz Tovar, Carlos Axel

    2011-01-01

    increase along with growing interest in biofuels, the oleochemical industry faces in the upcoming years major challenges in terms of design and development of better products and more sustainable processes to make them. Computer-aided methods and tools for process synthesis, modeling and simulation are...... widely used for design, analysis, and optimization of processes in the chemical and petrochemical industries. These computer-aided tools have helped the chemical industry to evolve beyond commodities toward specialty chemicals and ‘consumer oriented chemicals based products’. Unfortunately this is not...... been to develop systematic computer-aided methods (property models) and tools (database) related to the prediction of the necessary physical properties suitable for design and analysis of processes employing lipid technologies. The methods and tools include: the development of a lipid-database (CAPEC...

  10. Computer-aided surface representation and design

    Science.gov (United States)

    Barnhill, R. E.

    1984-01-01

    New methods for representing and approximating three and four dimensional surfaces were created. These schemes are the core of our forthcoming Surface Software Package. Surfaces are understood adequately only through the use of dynamic computer graphics; therefore, graphics capability is also included. The numerous applications of surface methods include modeling physical phenomena (e.g., combustion) and designing objects (e.g., airplanes and cars).

  11. Computer aided design study of hypermixing nozzles

    Science.gov (United States)

    Mefferd, L. A.; Bevilacqua, P. M.

    1979-01-01

    The development of a nozzle which combines the hypermixing and lobe mechanisms to achieve further increases in jet entrainment and ejector performance is investigated. A computer program which incorporates a two equation turbulence model and is used to predict and compare the evolution of jets from various nozzle designs is discussed. Increasing the length of the nozzle lobes and an alternating lobe nozzle are a methods examined for increasing the entrainment rate.

  12. PCACE-Personal-Computer-Aided Cabling Engineering

    Science.gov (United States)

    Billitti, Joseph W.

    1987-01-01

    PCACE computer program developed to provide inexpensive, interactive system for learning and using engineering approach to interconnection systems. Basically database system that stores information as files of individual connectors and handles wiring information in circuit groups stored as records. Directly emulates typical manual engineering methods of handling data, thus making interface between user and program very natural. Apple version written in P-Code Pascal and IBM PC version of PCACE written in TURBO Pascal 3.0

  13. Computer-Aided dispatching system design specification

    International Nuclear Information System (INIS)

    This document defines the performance requirements for a graphic display dispatching system to support Hanford Patrol emergency response. This system is defined as a Commercial-Off the-Shelf computer dispatching system providing both text and graphical display information while interfacing with the diverse reporting system within the Hanford Facility. This system also provided expansion capabilities to integrate Hanford Fire and the Occurrence Notification Center and provides back-up capabilities for the Plutonium Processing Facility

  14. Infobiotics : computer-aided synthetic systems biology

    OpenAIRE

    Blakes, Jonathan

    2013-01-01

    Until very recently Systems Biology has, despite its stated goals, been too reductive in terms of the models being constructed and the methods used have been, on the one hand, unsuited for large scale adoption or integration of knowledge across scales, and on the other hand, too fragmented. The thesis of this dissertation is that better computational languages and seamlessly integrated tools are required by systems and synthetic biologists to enable them to meet the significant challenges inv...

  15. Computer Aided Enzyme Design and Catalytic Concepts

    OpenAIRE

    Frushicheva, Maria P.; Mills, Matthew J. L.; Schopf, Patrick; Singh, Manoj K.; Warshel, Arieh

    2014-01-01

    Gaining a deeper understanding of enzyme catalysis is of great practical and fundamental importance. Over the years it has become clear that despite advances made in experimental mutational studies, a quantitative understanding of enzyme catalysis will not be possible without the use of computer modeling approaches. While we believe that electrostatic preorganization is by far the most important catalytic factor, convincing the wider scientific community of this may require the demonstration ...

  16. Computer-Aided dispatching system design specification

    Energy Technology Data Exchange (ETDEWEB)

    Briggs, M.G. [Kaiser Engineers Hanford Co., Richland, WA (United States)

    1996-05-03

    This document defines the performance requirements for a graphic display dispatching system to support Hanford Patrol emergency response. This system is defined as a Commercial-Off the-Shelf computer dispatching system providing both text and graphical display information while interfacing with the diverse reporting system within the Hanford Facility. This system also provided expansion capabilities to integrate Hanford Fire and the Occurrence Notification Center and provides back-up capabilities for the Plutonium Processing Facility.

  17. Computer-aided Analysis of Phisiological Systems

    OpenAIRE

    Balázs Benyó

    2007-01-01

    This paper presents the recent biomedical engineering research activity of theMedical Informatics Laboratory at the Budapest University of Technology and Economics.The research projects are carried out in the fields as follows: Computer aidedidentification of physiological systems; Diabetic management and blood glucose control;Remote patient monitoring and diagnostic system; Automated system for analyzing cardiacultrasound images; Single-channel hybrid ECG segmentation; Event recognition and ...

  18. Computer-aided protective system (CAPS)

    International Nuclear Information System (INIS)

    A method of improving the security of materials in transit is described. The system provides a continuously monitored position location system for the transport vehicle, an internal computer-based geographic delimiter that makes continuous comparisons of actual positions with the preplanned routing and schedule, and a tamper detection/reaction system. The position comparison is utilized to institute preprogrammed reactive measures if the carrier is taken off course or schedule, penetrated, or otherwise interfered with. The geographic locater could be an independent internal platform or an external signal-dependent system utilizing GPS, Loran or similar source of geographic information; a small (micro) computer could provide adequate memory and computational capacity; the insurance of integrity of the system indicates the need for a tamper-proof container and built-in intrusion sensors. A variant of the system could provide real-time transmission of the vehicle position and condition to a central control point for; such transmission could be encrypted to preclude spoofing

  19. Mathematical modelling in the computer-aided process planning

    Science.gov (United States)

    Mitin, S.; Bochkarev, P.

    2016-04-01

    This paper presents new approaches to organization of manufacturing preparation and mathematical models related to development of the computer-aided multi product process planning (CAMPP) system. CAMPP system has some peculiarities compared to the existing computer-aided process planning (CAPP) systems: fully formalized developing of the machining operations; a capacity to create and to formalize the interrelationships among design, process planning and process implementation; procedures for consideration of the real manufacturing conditions. The paper describes the structure of the CAMPP system and shows the mathematical models and methods to formalize the design procedures.

  20. Space systems computer-aided design technology

    Science.gov (United States)

    Garrett, L. B.

    1984-01-01

    The interactive Design and Evaluation of Advanced Spacecraft (IDEAS) system is described, together with planned capability increases in the IDEAS system. The system's disciplines consist of interactive graphics and interactive computing. A single user at an interactive terminal can create, design, analyze, and conduct parametric studies of earth-orbiting satellites, which represents a timely and cost-effective method during the conceptual design phase where various missions and spacecraft options require evaluation. Spacecraft concepts evaluated include microwave radiometer satellites, communication satellite systems, solar-powered lasers, power platforms, and orbiting space stations.

  1. Computer-Aided dispatching system design specification

    Energy Technology Data Exchange (ETDEWEB)

    Briggs, M.G.

    1996-09-27

    This document defines the performance requirements for a graphic display dispatching system to support Hanford Patrol emergency response. This document outlines the negotiated requirements as agreed to by GTE Northwest during technical contract discussions. This system defines a commercial off-the-shelf computer dispatching system providing both test and graphic display information while interfacing with diverse alarm reporting system within the Hanford Site. This system provided expansion capability to integrate Hanford Fire and the Occurrence Notification Center. The system also provided back-up capability for the Plutonium Processing Facility (PFP).

  2. Computer-aided Analysis of Phisiological Systems

    Directory of Open Access Journals (Sweden)

    Balázs Benyó

    2007-12-01

    Full Text Available This paper presents the recent biomedical engineering research activity of theMedical Informatics Laboratory at the Budapest University of Technology and Economics.The research projects are carried out in the fields as follows: Computer aidedidentification of physiological systems; Diabetic management and blood glucose control;Remote patient monitoring and diagnostic system; Automated system for analyzing cardiacultrasound images; Single-channel hybrid ECG segmentation; Event recognition and stateclassification to detect brain ischemia by means of EEG signal processing; Detection ofbreathing disorders like apnea and hypopnea; Molecular biology studies with DNA-chips;Evaluation of the cry of normal hearing and hard of hearing infants.

  3. Computer-aided Fault Tree Analysis

    International Nuclear Information System (INIS)

    A computer-oriented methodology for deriving minimal cut and path set families associated with arbitrary fault trees is discussed first. Then the use of the Fault Tree Analysis Program (FTAP), an extensive FORTRAN computer package that implements the methodology is described. An input fault tree to FTAP may specify the system state as any logical function of subsystem or component state variables or complements of these variables. When fault tree logical relations involve complements of state variables, the analyst may instruct FTAP to produce a family of prime implicants, a generalization of the minimal cut set concept. FTAP can also identify certain subsystems associated with the tree as system modules and provide a collection of minimal cut set families that essentially expresses the state of the system as a function of these module state variables. Another FTAP feature allows a subfamily to be obtained when the family of minimal cut sets or prime implicants is too large to be found in its entirety; this subfamily consists only of sets that are interesting to the analyst in a special sense

  4. Computer-aided retinal photocoagulation system

    Science.gov (United States)

    Barrett, Steven F.; Wright, Cameron H.; Jerath, Maya R.; Lewis, R. Stephen; Dillard, Bryan C.; Rylander, Henry G.; Welch, Ashley J.

    1996-01-01

    Researchers at the University of Texas at Austin's Biomedical Engineering Laser Laboratory and the U.S. Air Force Academy's Department of Electrical Engineering are developing a computer-assisted prototype retinal photocoagulation system. The project goal is to rapidly and precisely automatically place laser lesions in the retina for the treatment of disorders such as diabetic retinopathy and retinal tears while dynamically controlling the extent of the lesion. Separate prototype subsystems have been developed to control lesion parameters (diameter or depth) using lesion reflectance feedback and lesion placement using retinal vessels as tracking landmarks. Successful subsystem testing results in vivo on pigmented rabbits using an argon continuous wave laser are presented. A prototype integrated system design to simultaneously control lesion parameters and placement at clinically significant speeds is provided.

  5. Fracture resistance of computer-aided design/computer-aided manufacturing-generated composite resin-based molar crowns

    OpenAIRE

    Harada, A.; Nakamura, Keisuke; Kanno, Taro; Inagaki, R.; Ørtengren, Ulf Thore; Niwano, Y; Sasaki, Keiichi; Egusa, Hiroshi

    2015-01-01

    The aim of this study was to investigate whether different fabrication processes, such as the computer-aided design/computer-aided manufacturing (CAD/CAM) system or the manual build-up technique, affect the fracture resistance of composite resin-based crowns. Lava Ultimate (LU), Estenia C&B (EC&B), and lithium disilicate glass-ceramic IPS e.max press (EMP) were used. Four types of molar crowns were fabricated: CAD/CAM-generated composite resin-based crowns (LU crowns); manua...

  6. Handling manual of computer aided tracing system 'CATS' (version I)

    International Nuclear Information System (INIS)

    As an application of computer graphics, we have developed a code named as ''CATS'' which stands for computer aided tracing system. With CATS, many kinds of graphs and tables can be fed into the host computer as graphic data by a digitizing tablet. After editing figures on the graphic display terminal, one can obtain color pictures by hard copy unit or fair monocromatic copies by a laser printer through host computer. We employ an interactive graphical input in Japanese, so that users of ''CATS'' can easily edit figures without any knowledge on the complicated FORTRAN utility package for graphic display. The usage of ''CATS'' is summarized in this report. (author)

  7. Computer aided operation of complex systems

    International Nuclear Information System (INIS)

    Advanced technology is having the effect that industrial systems are becoming more highly automated and do not rely on human intervention for the control of normally planned and/or predicted situations. Thus the importance of the operator has shifted from being a manual controller to becoming more of a systems manager and supervisory controller. At the same time, the use of advanced information technology in the control room and its potential impact on human-machine capabilities places additional demands on the designer. This report deals with work carried out to describe the plant-operator relationship in order to systematize the design and evaluation of suitable information systems in the control room. This design process starts with the control requirements from the plant and transforms them into corresponding sets of decision-making tasks with appropriate allocation of responsibilities between computer and operator. To further effectivize this cooperation, appropriate information display and accession are identified. The conceptual work has been supported by experimental studies on a small-scale simulator. (author)

  8. Computer Aided Visual Inspection of Aircraft Surfaces

    Directory of Open Access Journals (Sweden)

    Rafia Mumtaz

    2012-02-01

    Full Text Available Non Destructive Inspections (NDI plays a vital role in aircraft industry as it determines the structural integrity of aircraft surface and material characterization. The existing NDI methods are time consuming, we propose a new NDI approach using Digital Image Processing that has the potential to substantially decrease the inspection time. Automatic Marking of cracks have been achieved through application of Thresholding, Gabor Filter and Non Subsampled Contourlet transform. For a novel method of NDI, the aircraft imagery is analyzed by three methods i.e Neural Networks, Contourlet Transform (CT and Discrete Cosine Transform (DCT. With the help of Contourlet Transform the two dimensional (2-D spectrum is divided into fine slices, using iterated directional filterbanks. Next, directional energy components for each block of the decomposed subband outputs are computed. These energy values are used to distinguish between the crack and scratch images using the Dot Product classifier. In next approach, the aircraft imagery is decomposed into high and low frequency components using DCT and the first order moment is determined to form feature vectors.A correlation based approach is then used for distinction between crack and scratch surfaces. A comparative examination between the two techniques on a database of crack and scratch images revealed that texture analysis using the combined transform based approach gave the best results by giving an accuracy of 96.6% for the identification of crack surfaces and 98.3% for scratch surfaces.

  9. Rule-oriented method for parameterized computer-aided design

    OpenAIRE

    Verroust, Anne; Schoneck, François; Roller, Dieter

    1992-01-01

    The paper presents an implementation for computer-aided design with dimensional parameters. The approach is based on the use of an expert system to uncouple constraint equations, and to find a possible sequence for the computation of the geometric elements for given dimension values. A set of rules for the expert system is described that solves the problem for 2D designs. The method is illustrated with an example design.

  10. Computer-aided design of flight control systems

    Science.gov (United States)

    Stengel, Robert F.; Sircar, Subrata

    1991-01-01

    A computer program is presented for facilitating the development and assessment of flight control systems, and application to a control design is discussed. The program is a computer-aided control-system design program based on direct digital synthesis of a proportional-integral-filter controller with scheduled linear-quadratic-Gaussian gains and command generator tracking of pilot inputs. The FlightCAD system concentrates on aircraft dynamics, flight-control systems, stability and performance, and has practical engineering applications.

  11. Computer-aided recognition of emphysema on digital chest radiography.

    OpenAIRE

    Miniati, Massimo; Coppini, Giuseppe; Monti, Simonetta; Bottai, Matteo; Paterni, Marco; Ferdeghini, Ezio Maria

    2011-01-01

    Background Computed tomography (CT) is the benchmark for diagnosis emphysema, but is costly and imparts a substantial radiation burden to the patient. Objective To develop a computer-aided procedure that allows recognition of emphysema on digital chest radiography by using simple descriptors of the lung shape. The procedure was tested against CT. Methods Patients (N=225), who had undergone postero-anterior and lateral digital chest radiographs and CT for diagnostic purposes, were studied and ...

  12. Computer-Aided Discovery and Categorisation of Personality Axioms

    OpenAIRE

    Kramer, Simon

    2014-01-01

    We propose a computer-algebraic, order-theoretic framework based on intuitionistic logic for the computer-aided discovery of personality axioms from personality-test data and their mathematical categorisation into formal personality theories in the spirit of F.~Klein's Erlanger Programm for geometrical theories. As a result, formal personality theories can be automatically generated, diagrammatically visualised, and mathematically characterised in terms of categories of invariant-preserving t...

  13. Assisted supervision of a computer aided tele-operation system

    International Nuclear Information System (INIS)

    This paper talks about Computer Aided Tele-operation (CAT) in dismantling and maintenance of nuclear plants. The current research orientations at CEA, basic concepts of the supervision assistance system and the realisation of a prototype are presented. (TEC). 3 refs., 4 figs

  14. CASCH: a tool for computer-aided scheduling

    OpenAIRE

    Ahmad, I.; Kwok, YK; Wu, MY; Shu, W

    2000-01-01

    A software tool called Computer-Aided Scheduling (CASCH) for parallel processing on distributed-memory multiprocessors in a complete parallel programming environment is presented. A compiler automatically converts sequential applications into parallel codes to perform program parallelization. The parallel code that executes on a target machine is optimized by CASCH through proper scheduling and mapping.

  15. User interface for integrated computer aided design systems

    Science.gov (United States)

    Schwing, James L.

    1986-01-01

    The purpose was the development of a user interface and other appropriate tools to be used in Computer Aided Design systems which can integrate a wide variety of independently developed design and analysis tools. The interface was intended for the integration of programs to be used in the conceptual design of aerospace systems. A user's manual is included.

  16. Computer-aided engineering for Qinshan CANDU projects

    International Nuclear Information System (INIS)

    The author briefly describes AECL's work in applying computer-aided engineering tools to the Qinshan CANDU Project. The main emphases will be to introduce the major CADD software tools and their use in civil design, process design and EI and C design. Other special software tools and non-CADD tools and their applications are also briefly introduced

  17. Caesy: A software tool for computer-aided engineering

    Science.gov (United States)

    Wette, Matt

    1993-01-01

    A new software tool, Caesy, is described. This tool provides a strongly typed programming environment for research in the development of algorithms and software for computer-aided control system design. A description of the user language and its implementation as they currently stand are presented along with a description of work in progress and areas of future work.

  18. Computer aided assessments and programming exercises with JACK

    OpenAIRE

    Goedicke, Michael; Striewe, Michael; Balz, Moritz

    2008-01-01

    In this report a system for computer aided assessments and exercises on Java programming is presented and discussed. The report includes a detailed system description, experiences and evaluations from using the system, plans for future development and a brief overview about related work and discussions.

  19. Computer Aided Evaluation of Higher Education Tutors' Performance

    Science.gov (United States)

    Xenos, Michalis; Papadopoulos, Thanos

    2007-01-01

    This article presents a method for computer-aided tutor evaluation: Bayesian Networks are used for organizing the collected data about tutors and for enabling accurate estimations and predictions about future tutor behavior. The model provides indications about each tutor's strengths and weaknesses, which enables the evaluator to exploit strengths…

  20. A Computer Aided System for Simulating Weld Metal Solidification Crack

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A computer-aided system for simulating weld solidification crack has been developed by which a welding engineer can carry out the welding solidification crack simulation on the basis of a commercial finite element analysis software package. Its main functions include calculating the heat generations of the moving arc, mesh generation, calculating stress-strain distributions with element rebirth technique.

  1. Computer Aided Education System SuperTest. Present and Prospective

    OpenAIRE

    Dumitru TODOROI; Elena NECHITA; Zinaida TODOROI; Crisan, Gloria Cerasela; Olga CHICU; Iulian Marius FURDU

    2007-01-01

    This paper analyzes the testing and self-testing process for the Computer Aided Education System (CAES) SuperTest, used at the Academy of Economic Studies of Chisinau, Moldova and recently implemented at the University of Bacau, Romania. We discuss here the future of this software, from the Information Society and Knowledge Society point of view.

  2. Computer Aided Design System for Developing Musical Fountain Programs

    Institute of Scientific and Technical Information of China (English)

    刘丹; 张乃尧; 朱汉城

    2003-01-01

    A computer aided design system for developing musical fountain programs was developed with multiple functions such as intelligent design, 3-D animation, manual modification and synchronized motion to make the development process more efficient. The system first analyzed the music form and sentiment using many basic features of the music to select a basic fountain program. Then, this program is simulated with 3-D animation and modified manually to achieve the desired results. Finally, the program is transformed to a computer control program to control the musical fountain in time with the music. A prototype system for the musical fountain was also developed. It was tested with many styles of music and users were quite satisfied with its performance. By integrating various functions, the proposed computer aided design system for developing musical fountain programs greatly simplified the design of the musical fountain programs.

  3. Method of Computer-aided Instruction in Situation Control Systems

    Directory of Open Access Journals (Sweden)

    Anatoliy O. Kargin

    2013-01-01

    Full Text Available The article considers the problem of computer-aided instruction in context-chain motivated situation control system of the complex technical system behavior. The conceptual and formal models of situation control with practical instruction are considered. Acquisition of new behavior knowledge is presented as structural changes in system memory in the form of situational agent set. Model and method of computer-aided instruction represent formalization, based on the nondistinct theories by physiologists and cognitive psychologists.The formal instruction model describes situation and reaction formation and dependence on different parameters, effecting education, such as the reinforcement value, time between the stimulus, action and the reinforcement. The change of the contextual link between situational elements when using is formalized.The examples and results of computer instruction experiments of the robot device “LEGO MINDSTORMS NXT”, equipped with ultrasonic distance, touch, light sensors.

  4. AIDS related thoracic lymphoma: evaluation by computed tomography

    International Nuclear Information System (INIS)

    The authors reviewed five cases of patients with acquired immunodeficiency syndrome (AIDS) related lymphoma to describe the thoracic findings on computed tomography. The patients were followed at Hospital Universitario Clementino Fraga Filho, Hospital Universitario Antonio Pedro and Hospital da Lagoa, from November, 1989 to March 1998. Epidemiological, clinical and pathological data from these patients were quiet variable and pulmonary nodules and masses, hilar and mediastinal lymphadenopathy, and thoracic wall masses were observed. AIDS related lymphomas involving the chest are pleomorphic and most commonly extranodal. (author)

  5. A Computer Aided Consultant System for Mammogram Diagnosis

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    A computer-aided consultant system for mammogram diagnosis is proposed in this paper based on mam-mogram segmentation as an image mining technique, to aid radiologistis in X-ray film interpretation. The generalarchitecture of the system is introduced first, followed by a discussion of mammogram segmentation using logic fil-ter, an analysis of the statistical data to the diagnostics with respect to different clinical information, and a brief in-troduction to a fuzzy decision making subsystem. Finally some experimental results are given.

  6. An overview of interactive computer graphics and its application to computer-aided engineering and design

    International Nuclear Information System (INIS)

    The purpose of this brief birds-eye view of interactive graphics is to list the key ideas, and to show how one of the most important application areas, Computer Aided Engineering/Design takes advantage of it. (orig.)

  7. Computer-aided light sheet flow visualization using photogrammetry

    Science.gov (United States)

    Stacy, Kathryn; Severance, Kurt; Childers, Brooks A.

    1994-01-01

    A computer-aided flow visualization process has been developed to analyze video images acquired from rotating and translating light sheet visualization systems. The computer process integrates a mathematical model for image reconstruction, advanced computer graphics concepts, and digital image processing to provide a quantitative and a visual analysis capability. The image reconstruction model, based on photogrammetry, uses knowledge of the camera and light sheet locations and orientations to project two-dimensional light sheet video images into three-dimensional space. A sophisticated computer visualization package, commonly used to analyze computational fluid dynamics (CFD) results, was chosen to interactively display the reconstructed light sheet images with the numerical surface geometry for the model or aircraft under study. The photogrammetric reconstruction technique and the image processing and computer graphics techniques and equipment are described. Results of the computer-aided process applied to both a wind tunnel translating light sheet experiment and an in-flight rotating light sheet experiment are presented. The capability to compare reconstructed experimental light sheet images with CFD solutions in the same graphics environment is also demonstrated.

  8. Computer-aided design of polymers and composites

    Science.gov (United States)

    Kaelble, D. H.

    1985-01-01

    This book on computer-aided design of polymers and composites introduces and discusses the subject from the viewpoint of atomic and molecular models. Thus, the origins of stiffness, strength, extensibility, and fracture toughness in composite materials can be analyzed directly in terms of chemical composition and molecular structure. Aspects of polymer composite reliability are considered along with characterization techniques for composite reliability, relations between atomic and molecular properties, computer aided design and manufacture, polymer CAD/CAM models, and composite CAD/CAM models. Attention is given to multiphase structural adhesives, fibrous composite reliability, metal joint reliability, polymer physical states and transitions, chemical quality assurance, processability testing, cure monitoring and management, nondestructive evaluation (NDE), surface NDE, elementary properties, ionic-covalent bonding, molecular analysis, acid-base interactions, the manufacturing science, and peel mechanics.

  9. A computer aided design procedure for generating gear teeth

    Science.gov (United States)

    Chang, S. H.; Huston, R. L.; Coy, J. J.

    1984-01-01

    A procedure for computer aided design (CAD) of gear teeth is presented. It is developed for generated teeth fabricated by a hob cutter or a shaper. It provides a means for analytically and numerically determining the tooth profile, given the cutter profile. An illustrative example with involute tooth profiles is given. Application with non-standard profiles and with bevel, spiral bevel, and hypoid gears is discussed.

  10. Using projection operators in computer aided geometric design

    OpenAIRE

    Busé, Laurent; Elkadi, Mohamed; Mourrain, Bernard

    2003-01-01

    We give an overview of resultant theory and some of its applications in computer aided geometric design. First, we mention different formulations of resultants, including the projective resultant, the toric resultant, and the residual resultant. In the second part we illustrate these tools, and other projection operators, on typical problems of CAGD such as surface implicitization, inversion, intersection, and detection of singularities of a parameterized surface.

  11. Computer Aided Diagnosis systems for MR cancer detection

    OpenAIRE

    Giannini, Valentina

    2012-01-01

    The research activity conducted during my PhD aims to develop two different Computer Aided Diagnosis (CAD) systems for breast and prostate cancer diagnosis using Magnetic Resonance Imaging. During the first part of this thesis I will illustrate a fully automatic CAD system for breast cancer detection and diagnosis with Dynamic Contrast Enhanced MRI (DCE-MRI) developed by our group. The main goal of a CAD system is lesions detection and characterization. The processing pipeline includes automa...

  12. Computer-aided modeling framework – a generic modeling template

    DEFF Research Database (Denmark)

    Fedorova, Marina; Sin, Gürkan; Gani, Rafiqul

    This work focuses on the development of a computer-aided modeling framework. The framework is a knowledge-based system that is built on a generic modeling language and structured on workflows for different modeling tasks. The overall objective is to support model developers and users to generate ....... The application of the modeling template is highlighted with a case study related to the modeling of a catalytic membrane reactor coupling dehydrogenation of ethylbenzene with hydrogenation of nitrobenzene...

  13. Computer-aided software evolution based on inferred dependencies

    OpenAIRE

    Harn, Meng-Chyi

    1999-01-01

    The major problem addressed by this research is how to automate parts of software evolution using dependency rules, especially for large and complex real time embedded systems. The main topics of this study are the development of a Relational Hypergraph model (RH model) and the design of a Computer Aided Software Evolution System (CASES). The goals of this dissertation are to explore the existing issues, to formalize software evolution, to reuse software evolution components, and to build a d...

  14. Modeling electric fields in two dimensions using computer aided design

    International Nuclear Information System (INIS)

    The authors describe a method for analyzing static electric fields in two dimensions using AutoCAD. The algorithm is coded in LISP and is modeled after Coloumb's Law. The software platform allows for facile graphical manipulations of field renderings and supports a wide range of hardcopy-output and data-storage formats. More generally, this application is representative of the ability to analyze data that is the solution to known mathematical functions with computer aided design (CAD)

  15. Peer Feedback in Computer Aided College English Writing Instruction

    OpenAIRE

    Ma Zhuo

    2016-01-01

    This study is to examine the acceptability of peer feedback in computer aided college English writing instruction. For the whole writing procedure, subjects in language labs were to take preparation, writing and evaluation stages, undergoing three editions suggested by peer feedbacks. For the first time reading, peers would comment on such general scale as subject and content of drafts, and the second focuses on specific items, for example the morphological, lexical and syntactical aspects, e...

  16. Computer-aided diagnosis of mammographic microcalcification clusters

    International Nuclear Information System (INIS)

    Computer-aided diagnosis techniques in medical imaging are developed for the automated differentiation between benign and malignant lesions and go beyond computer-aided detection by providing cancer likelihood for a detected lesion given image and/or patient characteristics. The goal of this study was the development and evaluation of a computer-aided detection and diagnosis algorithm for mammographic calcification clusters. The emphasis was on the diagnostic component, although the algorithm included automated detection, segmentation, and classification steps based on wavelet filters and artificial neural networks. Classification features were selected primarily from descriptors of the morphology of the individual calcifications and the distribution of the cluster. Thirteen such descriptors were selected and, combined with patient's age, were given as inputs to the network. The features were ranked and evaluated for the classification of 100 high-resolution, digitized mammograms containing biopsy-proven, benign and malignant calcification clusters. The classification performance of the algorithm reached a 100% sensitivity for a specificity of 85% (receiver operating characteristic area index Az=0.98±0.01). Tests of the algorithm under various conditions showed that the selected features were robust morphological and distributional descriptors, relatively insensitive to segmentation and detection errors such as false positive signals. The algorithm could exceed the performance of a similar visual analysis system that was used as basis for development and, combined with a simple image standardization process, could be applied to images from different imaging systems and film digitizers with similar sensitivity and specificity rates

  17. Vascular tissue engineering by computer-aided laser micromachining.

    Science.gov (United States)

    Doraiswamy, Anand; Narayan, Roger J

    2010-04-28

    Many conventional technologies for fabricating tissue engineering scaffolds are not suitable for fabricating scaffolds with patient-specific attributes. For example, many conventional technologies for fabricating tissue engineering scaffolds do not provide control over overall scaffold geometry or over cell position within the scaffold. In this study, the use of computer-aided laser micromachining to create scaffolds for vascular tissue networks was investigated. Computer-aided laser micromachining was used to construct patterned surfaces in agarose or in silicon, which were used for differential adherence and growth of cells into vascular tissue networks. Concentric three-ring structures were fabricated on agarose hydrogel substrates, in which the inner ring contained human aortic endothelial cells, the middle ring contained HA587 human elastin and the outer ring contained human aortic vascular smooth muscle cells. Basement membrane matrix containing vascular endothelial growth factor and heparin was to promote proliferation of human aortic endothelial cells within the vascular tissue networks. Computer-aided laser micromachining provides a unique approach to fabricate small-diameter blood vessels for bypass surgery as well as other artificial tissues with complex geometries. PMID:20308108

  18. Advances in a computer aided bilateral manipulator system

    International Nuclear Information System (INIS)

    This paper relates developments and experiments carried at Saclay in the frame of ARA/sup b/ program by the computer aided teleoperation (CAT) group. The goal is to improve efficiency and operational safety of remote operations using computer and sensors. They enable to substitute to the to the operator(s) in time sharing and/or in parallel, and augment amount and/or quality of sensory feedback. After describing the test facility in Saclay, the developments of various participants are described. Result of this work will be commercially available with the MA23M and future MAE 200 at La Calhene (France, UK, Japan)

  19. A Brief Introduction of Computer-aided Translation

    Institute of Scientific and Technical Information of China (English)

    贺江

    2015-01-01

    With the development of modern transportation and communication means,the distance between people is becoming shorter and communication more frequent.Translation is playing an increasingly significant role in this process,and the traditional translation methods cannot meet the needs of modern society.The computer technology,the core of translation technique,serves as the supplementary role of human.The paper introduces the concept of "computer-aided translation"and its common types,analyzes its advantages and disadvantages,and then points out that only by combining machine translation with human translation can it produce sound translation works.

  20. Computer aids land reclamation plan in mine areas

    International Nuclear Information System (INIS)

    A land reclamation plan is a basic and complex work for land reclamation engineering. This paper introduces the technique of a computer-aided subsided land reclamation plan (CASLRP) and focuses on the suitability evaluation of subsided land. Through suitability evaluation, how much land is suitable for development can be determined and the border of different land utilization and the program chart of land use can be drawn by computer. A practical example is given in which the CASLRP technique is applied to a mined area of Jiangsu Province

  1. Computer Aided Design (CAD) Of Thin Film Optical Coatings

    Science.gov (United States)

    Rao, M. K.; Chye, Tan C.; Seng, Ow C.

    1986-10-01

    This paper presents description of a versatile software package for computer-aided design of thin film optical coatings, which has been developed by employing latest version of Turbo Pascal Language and can be run on any IBM or compatible personal computers. Both numerical and/or graphical output for transmittance and reflectance of a multilayer dielectric structure at various wavelengths are easily obtained. Other features in the package include interactive monitoring of thin film coatings during deposition process, saving of input parameters and results in the form of files, a look-up table for commonly used materials and facilities to provide parameters to an optical thickness monitor.

  2. Computer-aided design of antenna structures and components

    Science.gov (United States)

    Levy, R.

    1976-01-01

    This paper discusses computer-aided design procedures for antenna reflector structures and related components. The primary design aid is a computer program that establishes cross sectional sizes of the structural members by an optimality criterion. Alternative types of deflection-dependent objectives can be selected for designs subject to constraints on structure weight. The computer program has a special-purpose formulation to design structures of the type frequently used for antenna construction. These structures, in common with many in other areas of application, are represented by analytical models that employ only the three translational degrees of freedom at each node. The special-purpose construction of the program, however, permits coding and data management simplifications that provide advantages in problem size and execution speed. Size and speed are essentially governed by the requirements of structural analysis and are relatively unaffected by the added requirements of design. Computation times to execute several design/analysis cycles are comparable to the times required by general-purpose programs for a single analysis cycle. Examples in the paper illustrate effective design improvement for structures with several thousand degrees of freedom and within reasonable computing times.

  3. Computer Navigation-aided Resection of Sacral Chordomas

    Directory of Open Access Journals (Sweden)

    Yong-Kun Yang

    2016-01-01

    Full Text Available Background: Resection of sacral chordomas is challenging. The anatomy is complex, and there are often no bony landmarks to guide the resection. Achieving adequate surgical margins is, therefore, difficult, and the recurrence rate is high. Use of computer navigation may allow optimal preoperative planning and improve precision in tumor resection. The purpose of this study was to evaluate the safety and feasibility of computer navigation-aided resection of sacral chordomas. Methods: Between 2007 and 2013, a total of 26 patients with sacral chordoma underwent computer navigation-aided surgery were included and followed for a minimum of 18 months. There were 21 primary cases and 5 recurrent cases, with a mean age of 55.8 years old (range: 35-84 years old. Tumors were located above the level of the S3 neural foramen in 23 patients and below the level of the S3 neural foramen in 3 patients. Three-dimensional images were reconstructed with a computed tomography-based navigation system combined with the magnetic resonance images using the navigation software. Tumors were resected via a posterior approach assisted by the computer navigation. Mean follow-up was 38.6 months (range: 18-84 months. Results: Mean operative time was 307 min. Mean intraoperative blood loss was 3065 ml. For computer navigation, the mean registration deviation during surgery was 1.7 mm. There were 18 wide resections, 4 marginal resections, and 4 intralesional resections. All patients were alive at the final follow-up, with 2 (7.7% exhibiting tumor recurrence. The other 24 patients were tumor-free. The mean Musculoskeletal Tumor Society Score was 27.3 (range: 19-30. Conclusions: Computer-assisted navigation can be safely applied to the resection of the sacral chordomas, allowing execution of preoperative plans, and achieving good oncological outcomes. Nevertheless, this needs to be accomplished by surgeons with adequate experience and skill.

  4. CEGB intergraph computer aided design system as an aid for the navigation of remote manipulators

    International Nuclear Information System (INIS)

    Computer Aided Design Systems with 3D Graphic capability can offer substantial benefits for the simulation and navigation of remote manipulators. The CEGB has been experimenting with its own Corporate INTERGRAPH CAD Network using as an example a remote links manipulator working within the above gas baffle dome area of an Advanced Gas Cooled Reactor. A report of this work is presented together with graphic simulations of the manipulator within the above dome area and reconstructions of images anticipated from the on board cameras. Future improvements in the speed of graphic processing will enable these techniques to be used for the on-line navigation of manipulators, as an aid to the interpretation of video images and for the training of operators without the need for full size test and training facilities. (author)

  5. PACS-Based Computer-Aided Detection and Diagnosis

    Science.gov (United States)

    Huang, H. K. (Bernie); Liu, Brent J.; Le, Anh HongTu; Documet, Jorge

    The ultimate goal of Picture Archiving and Communication System (PACS)-based Computer-Aided Detection and Diagnosis (CAD) is to integrate CAD results into daily clinical practice so that it becomes a second reader to aid the radiologist's diagnosis. Integration of CAD and Hospital Information System (HIS), Radiology Information System (RIS) or PACS requires certain basic ingredients from Health Level 7 (HL7) standard for textual data, Digital Imaging and Communications in Medicine (DICOM) standard for images, and Integrating the Healthcare Enterprise (IHE) workflow profiles in order to comply with the Health Insurance Portability and Accountability Act (HIPAA) requirements to be a healthcare information system. Among the DICOM standards and IHE workflow profiles, DICOM Structured Reporting (DICOM-SR); and IHE Key Image Note (KIN), Simple Image and Numeric Report (SINR) and Post-processing Work Flow (PWF) are utilized in CAD-HIS/RIS/PACS integration. These topics with examples are presented in this chapter.

  6. Computer Aided Interpretation Approach for Optical Tomographic Images

    CERN Document Server

    Klose, Christian D; Netz, Uwe; Beuthan, Juergen; Hielscher, Andreas H

    2010-01-01

    A computer-aided interpretation approach is proposed to detect rheumatic arthritis (RA) of human finger joints in optical tomographic images. The image interpretation method employs a multi-variate signal detection analysis aided by a machine learning classification algorithm, called Self-Organizing Mapping (SOM). Unlike in previous studies, this allows for combining multiple physical image parameters, such as minimum and maximum values of the absorption coefficient for identifying affected and not affected joints. Classification performances obtained by the proposed method were evaluated in terms of sensitivity, specificity, Youden index, and mutual information. Different methods (i.e., clinical diagnostics, ultrasound imaging, magnet resonance imaging and inspection of optical tomographic images), were used as "ground truth"-benchmarks to determine the performance of image interpretations. Using data from 100 finger joints, findings suggest that some parameter combinations lead to higher sensitivities while...

  7. The Computer Aided Aircraft-design Package (CAAP)

    Science.gov (United States)

    Yalif, Guy U.

    1994-01-01

    The preliminary design of an aircraft is a complex, labor-intensive, and creative process. Since the 1970's, many computer programs have been written to help automate preliminary airplane design. Time and resource analyses have identified, 'a substantial decrease in project duration with the introduction of an automated design capability'. Proof-of-concept studies have been completed which establish 'a foundation for a computer-based airframe design capability', Unfortunately, today's design codes exist in many different languages on many, often expensive, hardware platforms. Through the use of a module-based system architecture, the Computer aided Aircraft-design Package (CAAP) will eventually bring together many of the most useful features of existing programs. Through the use of an expert system, it will add an additional feature that could be described as indispensable to entry level engineers and students: the incorporation of 'expert' knowledge into the automated design process.

  8. ON APPLICATIONS OF COMPUTER AIDED INNOVATION BASED ON TRIZ%基于TRIZ的计算机辅助创新技术应用研究

    Institute of Scientific and Technical Information of China (English)

    兰芳; 覃波

    2009-01-01

    创新需要科学的方法和工具,计算机辅助创新技术CAI(Computer Aided Innovation)为创新提供了科学、高效的工具.通过了解创新问题解决理论TRIZ(Theory of Inventive Problem Solving)及CAI技术的产生发展过程,用框图表述CAI技术体系构成,以具体软件说明CAI软件的主要功能,并分析归纳基于CAI技术的产品创新流程,最后给出推广应用CAI技术的见解.

  9. Computer-aided recognition of emphysema on digital chest radiography

    International Nuclear Information System (INIS)

    Background: Computed tomography (CT) is the benchmark for diagnosis emphysema, but is costly and imparts a substantial radiation burden to the patient. Objective: To develop a computer-aided procedure that allows recognition of emphysema on digital chest radiography by using simple descriptors of the lung shape. The procedure was tested against CT. Methods: Patients (N = 225), who had undergone postero-anterior and lateral digital chest radiographs and CT for diagnostic purposes, were studied and divided in a derivation (N = 118) and in a validation sample (N = 107). CT images were scored for emphysema using the picture-grading method. Simple descriptors that measure the bending characteristics of the lung profile on chest radiography were automatically extracted from the derivation sample, and applied to train a neural network to assign a probability of emphysema between 0 and 1. The diagnostic performance of the procedure was described by the area under the receiver operating characteristic curve (AUC). Results: AUC was 0.985 (95% confidence interval, 0.965-0.998) in the derivation sample, and 0.975 (95% confidence interval, 0.936-0.998) in the validation sample. At a probability cutpoint of 0.55, the procedure yielded 92% sensitivity and 96% specificity in the derivation sample; 90% sensitivity and 97% specificity in the validation sample. False negatives on chest radiography had trace or mild emphysema on CT. Conclusions: The computer-aided procedure is simple and inexpensive, and permits quick recognition of emphysema on digital chest radiographs.

  10. Computer-aided recognition of emphysema on digital chest radiography

    Energy Technology Data Exchange (ETDEWEB)

    Miniati, Massimo, E-mail: Massimo.Miniati@unifi.it [Department of Medical and Surgical Critical Care, University of Florence, 50134 Florence (Italy); Coppini, Giuseppe; Monti, Simonetta [Institute of Clinical Physiology, National Research Council, 56124 Pisa (Italy); Bottai, Matteo [Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, 17177 Stockholm (Sweden); Division of Biostatistics, Arnold School of Public Health, University of South Carolina, 29208 Columbia, SC (United States); Paterni, Marco; Ferdeghini, Ezio Maria [Institute of Clinical Physiology, National Research Council, 56124 Pisa (Italy)

    2011-11-15

    Background: Computed tomography (CT) is the benchmark for diagnosis emphysema, but is costly and imparts a substantial radiation burden to the patient. Objective: To develop a computer-aided procedure that allows recognition of emphysema on digital chest radiography by using simple descriptors of the lung shape. The procedure was tested against CT. Methods: Patients (N = 225), who had undergone postero-anterior and lateral digital chest radiographs and CT for diagnostic purposes, were studied and divided in a derivation (N = 118) and in a validation sample (N = 107). CT images were scored for emphysema using the picture-grading method. Simple descriptors that measure the bending characteristics of the lung profile on chest radiography were automatically extracted from the derivation sample, and applied to train a neural network to assign a probability of emphysema between 0 and 1. The diagnostic performance of the procedure was described by the area under the receiver operating characteristic curve (AUC). Results: AUC was 0.985 (95% confidence interval, 0.965-0.998) in the derivation sample, and 0.975 (95% confidence interval, 0.936-0.998) in the validation sample. At a probability cutpoint of 0.55, the procedure yielded 92% sensitivity and 96% specificity in the derivation sample; 90% sensitivity and 97% specificity in the validation sample. False negatives on chest radiography had trace or mild emphysema on CT. Conclusions: The computer-aided procedure is simple and inexpensive, and permits quick recognition of emphysema on digital chest radiographs.

  11. Computer-Aided Vaccine Design: A Brief Report

    Directory of Open Access Journals (Sweden)

    R Ghasemi Khorasgani

    2012-09-01

    Full Text Available Background: Although the conventional vaccines have been instrumented in the incidence of many infectious diseases, the advances in genetic engineering and bioinformatics have provided the opportunity for developing improved and new vaccines.Methods: Reverse vaccinology was pioneered by a group of researchers investigating development of a vaccine against serogroup B Neisseria meningitidis. Reverse vaccinology analyzes the entire genome of a pathogen with the aid of computational programs to identify potentially antigenic extracellular proteins.Results: Using this method for Neisseria meningitidis genome analysis, 600 secretory or surface-exposed proteins were identified and, subsequently, 350 proteins were expressed and purified. Finally, seven proteins capable of activating the immune system against a range of strains were identified.Conclusion: Improved computational techniques are now able to provide researchers with high-confidence predictions for complex biological characteristics. This will herald a move to computer-aided biotechnology in which time-consuming and expensive large-scale experimental approaches are progressively replaced by functional bioinformatic investigations.

  12. Computer-aided design of bevel gear tooth surfaces

    Science.gov (United States)

    Shuo, Hung Chang; Huston, Ronald L.; Coy, John J.

    1989-01-01

    This paper presents a computer-aided design procedure for generating bevel gears. The development is based on examining a perfectly plastic, cone-shaped gear blank rolling over a cutting tooth on a plane crown rack. The resulting impression on the plastic gear blank is the envelope of the cutting tooth. This impression and envelope thus form a conjugate tooth surface. Equations are presented for the locus of points on the tooth surface. The same procedures are then extended to simulate the generation of a spiral bevel gear. The corresponding governing equations are presented.

  13. Computer-aided structural design of a lunar radio telescope

    Science.gov (United States)

    Akgul, Ferhat; Gerstle, Walter H.; Johnson, Stewart W.

    1990-01-01

    This paper describes a computer-aided structural design of the main reflector of a fully steerable radio telescope to be located (in the 21st century) on the moon, and presents the results of the structural analysis of the reflector. The reflector is a paraboloid with a surface area of 12,660 sq m and a focal ratio of 0.42. The reflector's surface will be covered by a 5.08 cm-thick sandwich panel made of thin-walled aluminum cells filled with low-density foam. The low weight of the design will be achieved by using graphite-epoxy as the structural material.

  14. Computer aided design of bevel gear tooth surfaces

    Science.gov (United States)

    Chang, S. H.; Huston, R. L.; Coy, J. J.

    1989-01-01

    This paper presents a computer-aided design procedure for generating bevel gears. The development is based on examining a perfectly plastic, cone-shaped gear blank rolling over a cutting tooth on a plane crown rack. The resulting impression on the plastic gear blank is the envelope of the cutting tooth. This impression and envelope thus form a conjugate tooth surface. Equations are presented for the locus of points on the tooth surface. The same procedures are then extended to simulate the generation of a spiral bevel gear. The corresponding governing equations are presented.

  15. Computer aided design and analysis of gear tooth geometry

    Science.gov (United States)

    Chang, S. H.; Huston, R. L.

    1987-01-01

    A simulation method for gear hobbing and shaping of straight and spiral bevel gears is presented. The method is based upon an enveloping theory for gear tooth profile generation. The procedure is applicable in the computer aided design of standard and nonstandard tooth forms. An inverse procedure for finding a conjugate gear tooth profile is presented for arbitrary cutter geometry. The kinematic relations for the tooth surfaces of straight and spiral bevel gears are proposed. The tooth surface equations for these gears are formulated in a manner suitable for their automated numerical development and solution.

  16. Computer-Aided Design Of Sheet-Material Parts

    Science.gov (United States)

    Gilbert, Jeffrey L.; Paternoster, Vincent Y.; Levitt, Maureen L.; Osterloh, Mark R.

    1991-01-01

    Computer-aided-design system partly automates tedious process of designing and guiding assembly of small pieces of flat sheet material into large surfaces that approximate smoothly curved surfaces having complicated three-dimensional shapes. Capability provides for flexibility enabling designer to assess quickly and easily effects of changes in design in making engineering compromises among various sizes and shapes. Saves time and money in both design and fabrication. Used in rocket-engine application and other applications requiring design of sheet-material parts.

  17. A computer aided engineering tool for ECLS systems

    Science.gov (United States)

    Bangham, Michal E.; Reuter, James L.

    1987-01-01

    The Computer-Aided Systems Engineering and Analysis tool used by NASA for environmental control and life support system design studies is capable of simulating atmospheric revitalization systems, water recovery and management systems, and single-phase active thermal control systems. The designer/analysis interface used is graphics-based, and allows the designer to build a model by constructing a schematic of the system under consideration. Data management functions are performed, and the program is translated into a format that is compatible with the solution routines.

  18. 9th Asian Conference on Computer-Aided Surgery

    CERN Document Server

    2016-01-01

    This book presents the latest research advances in the theory, design, control, and application of robot systems intended for a variety of purposes such as manipulation, manufacturing, automation, surgery, locomotion, and biomechanics. Several chapters deal with fundamental kinematics in nature, including synthesis, calibration, redundancy, force control, dexterity, inverse and forward kinematics, kinematic singularities, and over-constrained systems. This book is a compilation of the extended versions of the very best papers selected from the many that were presented at the Asian Conference on Computer-Aided Surgery held September 16–18, 2013, in Tokyo, Japan (ACCAS 2013).

  19. Efficient Use of Preisach Hysteresis Model in Computer Aided Design

    Directory of Open Access Journals (Sweden)

    IONITA, V.

    2013-05-01

    Full Text Available The paper presents a practical detailed analysis regarding the use of the classical Preisach hysteresis model, covering all the steps, from measuring the necessary data for the model identification to the implementation in a software code for Computer Aided Design (CAD in Electrical Engineering. An efficient numerical method is proposed and the hysteresis modeling accuracy is tested on magnetic recording materials. The procedure includes the correction of the experimental data, which are used for the hysteresis model identification, taking into account the demagnetizing effect for the sample that is measured in an open-circuit device (a vibrating sample magnetometer.

  20. Computer-Aided Chemistry at Surrey — the way ahead

    OpenAIRE

    Buist, G. J.; Howlin, B.; Jones, J.R.; Povey, D. C.

    1989-01-01

    This article describes the objectives and rationale of the degree course in Computer-Aided Chemistry at the University of Surrey. The course, which is the first of its kind, represents a sharp break with the past in that industry was intimately involved in the early stages of the planning as well as providing subsequent support; furthermore, much of the teaching is done via a workshop approach. The course aims to produce high-calibre chemists, particularly of the analytical kind, with a firm ...

  1. Computer-aided design of bromelain and papain covalent immobilization

    OpenAIRE

    Bessy Cutiño-Avila; Dayrom Gil Pradas; Carlos Aragón Abreu; Yuniel Fernández Marrero; Martha Hernández de la Torre; Emir Salas Sarduy; María de los Ángeles Chávez Planes; José Manuel Guisán Seijas; Joaquín Díaz Brito; Alberto del Monte-Martínez

    2014-01-01

    Título en español: Diseño asistido por computadora de la inmovilización covalente de bromelina y papaína.Título corto: Computer-aided design of bromelain and papain. Abstract: Enzymes as immobilized derivatives have been widely used in Food, Agrochemical, Pharmaceutical and Biotechnological industries. Protein immobilization is probably the most used technology to improve the operational stability of these molecules. Bromelain (Ananas comosus) and papain (Carica papaya) are cystein proteases ...

  2. SNL Mechanical Computer Aided Design (MCAD) guide 2007.

    Energy Technology Data Exchange (ETDEWEB)

    Moore, Brandon; Pollice, Stephanie L.; Martinez, Jack R.

    2007-12-01

    This document is considered a mechanical design best-practice guide to new and experienced designers alike. The contents consist of topics related to using Computer Aided Design (CAD) software, performing basic analyses, and using configuration management. The details specific to a particular topic have been leveraged against existing Product Realization Standard (PRS) and Technical Business Practice (TBP) requirements while maintaining alignment with sound engineering and design practices. This document is to be considered dynamic in that subsequent updates will be reflected in the main title, and each update will be published on an annual basis.

  3. Computer-aided design of a coffee-dragging device

    OpenAIRE

    Marcus Vinicuis Morais de Oliveira; Mauri Martins Teixeira; Haroldo Carlos Fernandes; Daniel Marçal de Queiroz; Raphael Magalhães Gomes Moreira

    2014-01-01

    Dragging is the most costly and time-consuming stage of the coffee harvest. Therefore, its mechanization is important. The objectives of this study were to design, build, and evaluate the dynamics of a coffee-dragging device in a laboratory setting. The prototype consists of a dragging device with rods mounted on a metal plate and a chassis. Computer-aided design (CAD) software was used to generate a solid second-order tetrahedral mesh for use in finite element analyses of the device and its ...

  4. CATIA Core Tools Computer Aided Three-Dimensional Interactive Application

    CERN Document Server

    Michaud, Michel

    2012-01-01

    CATIA Core Tools: Computer-Aided Three-Dimensional Interactive Application explains how to use the essential features of this cutting-edge solution for product design and innovation. The book begins with the basics, such as launching the software, configuring the settings, and managing files. Next, you'll learn about sketching, modeling, drafting, and visualization tools and techniques. Easy-to-follow instructions along with detailed illustrations and screenshots help you get started using several CATIA workbenches right away. Reverse engineering--a valuable product development skill--is also covered in this practical resource.

  5. Technology computer aided design simulation for VLSI MOSFET

    CERN Document Server

    Sarkar, Chandan Kumar

    2013-01-01

    Responding to recent developments and a growing VLSI circuit manufacturing market, Technology Computer Aided Design: Simulation for VLSI MOSFET examines advanced MOSFET processes and devices through TCAD numerical simulations. The book provides a balanced summary of TCAD and MOSFET basic concepts, equations, physics, and new technologies related to TCAD and MOSFET. A firm grasp of these concepts allows for the design of better models, thus streamlining the design process, saving time and money. This book places emphasis on the importance of modeling and simulations of VLSI MOS transistors and

  6. Present state of computer-aided diagnosis (CAD) development

    International Nuclear Information System (INIS)

    Topics of computer-aided detection (CAD) are reviewed. Commercially available, Food and Drug Administration (FDA)-approved CAD systems are for fields of breast cancer (mammography), chest (flat X-ray and CT imaging) and colon (polyp detection). In Japan, only mammography CAD is approved. Efficacy of CAD is controversial, for which reliable database is important, and its construction is under development in various medical fields. Digitalized image is now popularized, which conceivably leads to improve the cost-effectiveness of diagnosis with CAD. For incentive, approval for health insurance would be the case as seen in the increased CAD sale by R2 Technology Co., and MHLW actually assists facilities to introduce the reading-aid system of mammography by sharing a half of its cost. There are 2 big projects for CAD study supported by MECSST, which the author concerns. One is the development of diagnostic aid for the multi-dimensional medical images where the multi-organ, multi-disease CAD system is considered. The other involves the CAD in brain MRI, in breast US and in eyeground picture. It is not in so far future for patients and doctors to fully enjoy the benefit of CAD. (R.T.)

  7. Fracture resistance of computer-aided design/computer-aided manufacturing-generated composite resin-based molar crowns.

    Science.gov (United States)

    Harada, Akio; Nakamura, Keisuke; Kanno, Taro; Inagaki, Ryoichi; Örtengren, Ulf; Niwano, Yoshimi; Sasaki, Keiichi; Egusa, Hiroshi

    2015-04-01

    The aim of this study was to investigate whether different fabrication processes, such as the computer-aided design/computer-aided manufacturing (CAD/CAM) system or the manual build-up technique, affect the fracture resistance of composite resin-based crowns. Lava Ultimate (LU), Estenia C&B (EC&B), and lithium disilicate glass-ceramic IPS e.max press (EMP) were used. Four types of molar crowns were fabricated: CAD/CAM-generated composite resin-based crowns (LU crowns); manually built-up monolayer composite resin-based crowns (EC&B-monolayer crowns); manually built-up layered composite resin-based crowns (EC&B-layered crowns); and EMP crowns. Each type of crown was cemented to dies and the fracture resistance was tested. EC&B-layered crowns showed significantly lower fracture resistance compared with LU and EMP crowns, although there was no significant difference in flexural strength or fracture toughness between LU and EC&B materials. Micro-computed tomography and fractographic analysis showed that decreased strength probably resulted from internal voids in the EC&B-layered crowns introduced by the layering process. There was no significant difference in fracture resistance among LU, EC&B-monolayer, and EMP crowns. Both types of composite resin-based crowns showed fracture loads of >2000 N, which is higher than the molar bite force. Therefore, CAD/CAM-generated crowns, without internal defects, may be applied to molar regions with sufficient fracture resistance. PMID:25683749

  8. Computer aided systems human engineering: A hypermedia tool

    Science.gov (United States)

    Boff, Kenneth R.; Monk, Donald L.; Cody, William J.

    1992-01-01

    The Computer Aided Systems Human Engineering (CASHE) system, Version 1.0, is a multimedia ergonomics database on CD-ROM for the Apple Macintosh II computer, being developed for use by human system designers, educators, and researchers. It will initially be available on CD-ROM and will allow users to access ergonomics data and models stored electronically as text, graphics, and audio. The CASHE CD-ROM, Version 1.0 will contain the Boff and Lincoln (1988) Engineering Data Compendium, MIL-STD-1472D and a unique, interactive simulation capability, the Perception and Performance Prototyper. Its features also include a specialized data retrieval, scaling, and analysis capability and the state of the art in information retrieval, browsing, and navigation.

  9. A Computer-Aided Detection System for Digital Chest Radiographs.

    Science.gov (United States)

    Carrillo-de-Gea, Juan Manuel; García-Mateos, Ginés; Fernández-Alemán, José Luis; Hernández-Hernández, José Luis

    2016-01-01

    Computer-aided detection systems aim at the automatic detection of diseases using different medical imaging modalities. In this paper, a novel approach to detecting normality/pathology in digital chest radiographs is proposed. The problem tackled is complicated since it is not focused on particular diseases but anything that differs from what is considered as normality. First, the areas of interest of the chest are found using template matching on the images. Then, a texture descriptor called local binary patterns (LBP) is computed for those areas. After that, LBP histograms are applied in a classifier algorithm, which produces the final normality/pathology decision. Our experimental results show the feasibility of the proposal, with success rates above 87% in the best cases. Moreover, our technique is able to locate the possible areas of pathology in nonnormal radiographs. Strengths and limitations of the proposed approach are described in the Conclusions. PMID:27372536

  10. Use of computer modeling to aid in hydraulic barrier design

    International Nuclear Information System (INIS)

    Releases of No. 6 and No. 4 fuel oil were discovered at a private boarding school. The releases impact a nearby pond with non-aqueous phase liquid hydrocarbon (NAPL), and threaten to impact an adjacent wetland. Prior to implementation of a permanent remedial solution, such as surfactant treatment and bioremediation, immediate containment of the NAPL was proposed via a barrier-gate containment system. The proposed barrier-gate containment system consisted of a high-density polyethylene barrier, horizontal wells, three flow-through gates, and downgradient infiltration galleries. Computer modeling of groundwater and NAPL flow was conducted utilizing a finite element multiphase model to evaluate the impacts to local hydrogeology associated with the barrier. These impacts included upgradient groundwater mounding and restriction of groundwater flux to the wetland. Model simulations aided in the identification of improvements to the initial barrier design and guided subsequent design modifications. Results of the simulations indicate the usefulness of computer modeling in containment system design

  11. Development of computer aided diagnosis for lung cancer CT screening

    International Nuclear Information System (INIS)

    The introduction of low dose lung cancer helical CT screening to the clinical site has been the fundamental basis of research on Computer Aided Diagnosis (CAD) using thoracic CT images. Our purpose is the early detection of lung cancer leading to its early treatment, in order to reduce the mortality of lung cancer. From multi-slice CT, lung cancer screening has been activated more. Since CT screening contains a lot of images compared with the conventional X-ray, research and development on the utilization of computer and network using the new diagnosis support technology is required. Due to the demand from actual clinical site, the research group from The University of Tokushima has started the research and development of CAD using lung cancer CT images. We report the result and the future works. (author)

  12. The ergonomics of computer aided design within advanced manufacturing technology.

    Science.gov (United States)

    John, P A

    1988-03-01

    Many manufacturing companies have now awakened to the significance of computer aided design (CAD), although the majority of them have only been able to purchase computerised draughting systems of which only a subset produce direct manufacturing data. Such companies are moving steadily towards the concept of computer integrated manufacture (CIM), and this demands CAD to address more than draughting. CAD architects are thus having to rethink the basic specification of such systems, although they typically suffer from an insufficient understanding of the design task and have consequently been working with inadequate specifications. It is at this fundamental level that ergonomics has much to offer, making its contribution by encouraging user-centred design. The discussion considers the relationships between CAD and: the design task; the organisation and people; creativity; and artificial intelligence. It finishes with a summary of the contribution of ergonomics. PMID:15676646

  13. Disassembly and aggregation in computer aided overhaul preparation

    Directory of Open Access Journals (Sweden)

    W. Janik

    2011-02-01

    Full Text Available Purpose: Disassembly and aggregation procedures are main aspects of an overhaul process. The paper presents the example of an application that solves automation of technical mean recirculation procedures. Automation in the aspect of overhaul process preparation should be obtained through new tools specially oriented to refurbish mechanically used or damaged components.Design/methodology/approach: Methodology is based on complex overhaul process analysis that conclude technical mean recirculation method. This method brings technical mean back to operation with procedures (like: disassembly, aggregation, examination, preparation of refurbishing technology, overhaul process report generation determined in specific order.Findings: Method of technical mean refurbishing with computer aid application. Proposition of automation in aspects of: disassembly (disassembly correct sequence and aggregation procedures (which elements should be examined.Research limitations/implications: Important limitations are: disassembly based on assembly order, automation widest range possible when disassembly and aggregation is based on existing documentation. Aggregation algorithm based on machined type of elements.Practical implications: Nowadays overhaul processes are based directly in most cases on leading technologist experience. Elaborated method and application leads to more objective solutions (decisions based on algorithms results.Originality/value: CAO is an original and new approach that should be considered especially in heavy industry. Nowadays subjective decisions about how to refurbish in overhaul processes could be replaced by automated computer aided solutions. Positive economic impact to future and present overhaul processes execution in industry.

  14. Computer-aided morphometry of liver inflammation in needle biopsies

    Institute of Scientific and Technical Information of China (English)

    N Dioguardi; B Franceschini; C Russo; F Grizzi

    2005-01-01

    AIM: To introduce a computer-aided morphometric method for quantifying the necro-inflammatory phase in liver biopsy specimens using fractal geometry and Delaunay's triangulation.METHODS: Two-micrometer thick biopsy sections taken from 78 chronic hepatitis C virus-infected patients were immunohistochemically treated to identify the inflammatory cells. An automatic computer-aided image analysis system was used to define the inflammatory cell network defined on the basis of Delaunay's triangulation,and the inflammatory cells were geometrically classified as forming a cluster (an aggregation of a minimum of three cells) or as being irregularly distributed within the tissue. The phase of inflammatory activity was estimated using Hurst's exponent.RESULTS: The proposed automatic method was rapid and objective. It could not only provide rigorous results expressed by scalar numbers, but also allow the state of the whole organ to be represented by Hurst's exponent with an error of no more than 12%.CONCLUSION: The availability of rigorous metrical measures and the reasonable representativeness of the status of the organ as a whole raise the question as to whether the indication for hepatic biopsy should be revised by establishing clear rules concerning the contraindications suggested by its invasiveness and subjective interpretation.

  15. Computer-aided ultrasonic inspection of steam turbine rotors

    Energy Technology Data Exchange (ETDEWEB)

    Mayer, K.H.; Weber, M.; Weiss, M. [GEC ALSTHOM Energie GmbH, Nuremberg (Germany)

    1998-12-31

    As the output and economic value of power plants increase, the detection and sizing of the type of flaws liable to occur in the rotors of turbines using ultrasonic methods assumes increasing importance. An ultrasonic inspection carried out at considerable expense is expected to bring to light all safety-relevant flaws and to enable their size to be determined so as to permit a fracture-mechanics analysis to assess the reliability of the rotor under all possible stresses arising in operation with a high degree of accuracy. The advanced computer-aided ultrasonic inspection of steam turbine rotors have improved reliability, accuracy and reproducibility of ultrasonic inspection. Further, there has been an improvement in the resolution of resolvable group indications by applying reconstruction and imagine methods. In general, it is also true for the advanced computer-aided ultrasonic inspection methods that, in the case of flaw-affected forgings, automated data acquisition provides a substantial rationalization and a significant documentation of the results for the fracture mechanics assessment compared to manual inspection. (orig.) 8 refs.

  16. Collaborative research on fluidization employing computer-aided particle tracking

    International Nuclear Information System (INIS)

    The objective of this work is to obtain unique, fundamental information on fluidization dynamics over a wide range of flow regimes using a Transportable Computer-Aided Particle Tracking Apparatus (TCAPTA). The contractor will design and fabricate a transportable version of the Computer-Aided Particle Tracking Facility (CAPTF) he has previously developed. The contractor will install and operate the (TCAPTA) at the METC fluidization research facilities. Quantitative data on particle motion will be obtained and reduced. The data will be used to provide needed information for modeling of bed dynamics, and prediction of bed performance, including erosion. A radioactive tracer particle, identical in size shape and mass to the bed particles under study, is mixed in the bed. The radiation emitted by the tracer particle, monitored continuously by 16 scintillation detectors, allows its position to be determined as a function of time. Stochastic mixing processes intrinsic to fluidization further cause the particle to travel to all active regions of the bed, thus sampling the motion in these regions. After a long test run to insure that a sufficient sampling have been acquired, time-differentiation and other statistical processing will then yield the mean velocity distribution, the fluctuating velocity distribution, many types of auto- and cross correlations, as well as mean fluxes, including the mean momentum fluxes due to random motion, which represent the kinetic contributions to the mean stress tensor

  17. Assessment technique for computer-aided manufactured sockets

    Directory of Open Access Journals (Sweden)

    Joan E. Sanders, PhD

    2011-08-01

    Full Text Available This article presents an assessment technique for testing the quality of prosthetic socket fabrication processes at computer-aided manufacturing facilities. The assessment technique is potentially useful to both facilities making sockets and companies marketing manufacturing equipment seeking to assess and improve product quality. To execute the assessment technique, an evaluator fabricates a collection of test models and sockets using the manufacturing suite under evaluation, then measures their shapes using scanning equipment. Overall socket quality is assessed by comparing socket shapes with electronic file (e-file shapes. To characterize carving performance, model shapes are compared with e-file shapes. To characterize forming performance, socket shapes are compared with model shapes. The mean radial error (MRE, which is the average difference in radii between the two compared shapes, provides insight into sizing quality. Interquartile range (IQR, the range of radial error for the best-matched half of the points on the compared socket surfaces, provides insight into regional shape quality. The source(s of socket shape error may be pinpointed by separately determining MRE and IQR for carving and forming. The developed assessment technique may provide a useful tool to the prosthetics community and industry to help identify problems and limitations in computer-aided manufacturing and give insight into appropriate modifications to overcome them.

  18. Translator-computer interaction in action:An observational process study of computer-aided translation

    OpenAIRE

    Bundgaard, Kristine; Christensen, Tina Paulsen; Schjoldager, Anne

    2016-01-01

    Though we lack empirically-based knowledge of the impact of computer-aided translation (CAT) tools on translation processes, it is generally agreed that all professional translators are now involved in some kind of translator-computer interaction (TCI), using O’Brien’s (2012) term. Taking a TCI perspective, this paper investigates the relationship between machines and humans in the field of translation, analysing a CAT process in which machine-translation (MT) technology was integrated into a...

  19. Predicting low velocity impact damage and Compression-After-Impact (CAI) behaviour of composite laminates

    OpenAIRE

    Tan, Wei; Falzon, Brian G.; Chiu, Louis N S; Price, Mark

    2015-01-01

    Low-velocity impact damage can drastically reduce the residual strength of a composite structure even when the damage is barely visible. The ability to computationally predict the extent of damage and compression-after-impact (CAI) strength of a composite structure can potentially lead to the exploration of a larger design space without incurring significant time and cost penalties. A high-fidelity three-dimensional composite damage model, to predict both low-velocity impact damage and CAI st...

  20. Computer based aids for operator support in nuclear power plants

    International Nuclear Information System (INIS)

    In the framework of the Agency's programme on nuclear safety a survey was carried out based on a questionnaire to collect information on computer based aids for operator support in nuclear power plants in Member States. The intention was to put together a state-of-the-art report where different systems under development or already implemented would be described. This activity was also supported by an INSAG (International Nuclear Safety Advisory Group) recommendation. Two consultant's meetings were convened and their work is reflected in the two sections of the technical document. The first section, produced during the first meeting, is devoted to provide some general background material on the overall usability of Computerized Operator Decision Aids (CODAs), their advantages and shortcomings. During this first meeting, the first draft of the questionnaire was also produced. The second section presents the evaluation of the 40 questionnaires received from 11 Member States and comprises a short description of each system and some statistical and comparative observations. The ultimate goal of this activity was to inform Member States, particularly those who are considering implementation of a CODA, on the status of related developments elsewhere. 8 refs, 10 figs, 4 tabs

  1. Operator aids and expert systems in user computer interfaces

    International Nuclear Information System (INIS)

    Recent events have demonstrated the potential for catastrophic accidents at process control facilities, resulting in severe economic damages or loss of human life. Human operators play a central role in the outcome of accidents in process control plants, because of their responsibility to make decisions regarding the appropriate corrective actions needed to control the event. In recent years, researchers have been attempting to apply Artificial Intelligence (AI) methods for developing computer-based decision aids for process control operators. Much of this research activity has taken place within the nuclear industry. In order to assess the implications of expert systems for nuclear reactor operators, the United States Nuclear Regulatory Commission (USNRC) has sponsored a research program at the Idaho National Engineering Laboratory (INEL). Included in this program have been the development of a prototype expert system for nuclear reactor operators, as well as two experiments to measure the effects of the expert system on operator performance in simulated accident conditions. This paper briefly summarizes the experience gained during this research program and assesses the potential future of expert system decision aids for process control operators

  2. A Computer Aided System for Tropical Leaf Medicinal Plant Identification

    Directory of Open Access Journals (Sweden)

    Yeni Herdiyeni

    2013-01-01

    Full Text Available The objective of this paper is to develop a computer aided system for leaf medicinal plant identification using ProbabilisticNeural Network. In Indonesia only 20-22% of medicinal plants have been cultivated. Generally, identification process of medicinalplants has been done manually by a herbarium taxonomist using guidebook of taxonomy/dendrology. This system is designed to helptaxonomist to identify leaf medicinal plant automatically using acomputer-aided system. This system uses three features of leaf toidentify the medicinal plant, i.e., morphology, shape, and texture. Leaf is used in this system for identification because easily to find.To classify medicinal plant we used Probabilistic Neural Network. The features will be combined using Product Decision Rule (PDR.The system was tested on 30 species medicinal plant from Garden of Biopharmaca Research Center and Greenhouse Center of Exsitu Conservation of Medicinal Indonesian Tropical Forest Plants, Faculty of Forestry, Bogor Agriculture University, Indonesia.Experiment results showed that the accuracy of medicinal plant identification using combination of leaf features increase until74,67%.The comparative analysis of leaf features has been performed statistically. It showed that shape is a dominant features for plant identification. This system is very promising to help people identify medicinal plant automatically and for conservation and utilization of medicinal plants.

  3. Computer aided plant engineering: An analysis and suggestions for computer use

    International Nuclear Information System (INIS)

    To get indications to and boundary conditions for computer use in plant engineering, an analysis of the engineering process was done. The structure of plant engineering is represented by a network of substaks and subsets of data which are to be manipulated. Main tool for integration of CAD-subsystems in plant engineering should be a central database which is described by characteristical requirements and a possible simple conceptual schema. The main features of an interactive system for computer aided plant engineering are shortly illustrated by two examples. The analysis leads to the conclusion, that an interactive graphic system for manipulation of net-like structured data, usable for various subtasks, should be the base for computer aided plant engineering. (orig.)

  4. Latest developments for a computer aided thermohydraulic network

    International Nuclear Information System (INIS)

    Thermohydraulic networks are I-D systems characterized by a small number of basic components (pumps, valves, heat exchangers, etc) connected by pipes and limited spatially by a defined number of boundary conditions (tanks, atmosphere, etc). The network system is simulated by the well known computer program RELAPS/mod3. Information concerning the network geometry component behaviour, initial and boundary conditions are usually supplied to the RELAPS code using an ASCII input file by means of 'input cards'. CATNET (Computer Aided Thermalhydraulic NETwork) is a graphically user interface that, under specific user guidelines which completely define its range of applicability, permits a very high level of standardization and simplification of the RELAPS/mod3 input deck development process as well as of the output processing. The characteristics of the components (pipes, valves, pumps etc), defining the network system can be entered through CATNET. The CATNET interface is provided by special functions to compute form losses in the most typical bending and branching configurations. When the input of all system components is ready, CATNET is able to generate the RELAPS/mod3 input file. Finally, by means of CATNET, the RELAPS/mod3 code can be run and its output results can be transformed to an intuitive display form. The paper presents an example of application of the CATNET interface as well as the latest developments which greatly simplified the work of the users and allowed to reduce the possibility of input errors. (authors)

  5. Orthodontics: computer-aided diagnosis and treatment planning

    Science.gov (United States)

    Yi, Yaxing; Li, Zhongke; Wei, Suyuan; Deng, Fanglin; Yao, Sen

    2000-10-01

    The purpose of this article is to introduce the outline of our newly developed computer-aided 3D dental cast analyzing system with laser scanning, and its preliminary clinical applications. The system is composed of a scanning device and a personal computer as a scanning controller and post processor. The scanning device is composed of a laser beam emitter, two sets of linear CCD cameras and a table which is rotatable by two-degree-of-freedom. The rotating is controlled precisely by a personal computer. The dental cast is projected and scanned with a laser beam. Triangulation is applied to determine the location of each point. Generation of 3D graphics of the dental cast takes approximately 40 minutes. About 170,000 sets of X,Y,Z coordinates are store for one dental cast. Besides the conventional linear and angular measurements of the dental cast, we are also able to demonstrate the size of the top surface area of each molar. The advantage of this system is that it facilitates the otherwise complicated and time- consuming mock surgery necessary for treatment planning in orthognathic surgery.

  6. Computer-aided diagnostic system for mass survey chest images

    International Nuclear Information System (INIS)

    In order to support screening of chest radiographs on mass survey, a computer-aided diagnostic system that automatically detects abnormality of candidate images using a digital image analysis technique has been developed. Extracting boundary lines of lung fields and examining their shapes allowed various kind of abnormalities to be detected. Correction and expansion were facilitated by describing the system control, image analysis control and judgement of abnormality in the rule type programming language. In the experiments using typical samples of student's radiograms, good results were obtained for the detection of abnormal shape of lung field, cardiac hypertrophy and scoliosis. As for the detection of diaphragmatic abnormality, relatively good results were obtained but further improvements will be necessary

  7. Computer-aided assessment in statistics: the CAMPUS project

    Directory of Open Access Journals (Sweden)

    Neville Hunt

    1998-12-01

    Full Text Available The relentless drive for 'efficiency' in higher education, and the consequent increase in workloads, has given university teachers a compelling incentive to investigate alternative forms of assessment. Some forms of assessment with a clear educational value can no longer be entertained because of the burden placed on the teacher. An added concern is plagiarism, which anecdotal evidence would suggest is on the increase yet which is difficult to detect in large modules with more than one assessor. While computer-aided assessment (CAA has an enthusiastic following, it is not clear to many teachers that it either reduces workloads or reduces the risk of cheating. In an ideal world, most teachers would prefer to give individual attention and personal feedback to each student when marking their work. In this sense CAA must be seen as second best and will therefore be used only if it is seen to offer significant benefits in terms of reduced workloads or increased validity.

  8. Evolution of Geometric Sensitivity Derivatives from Computer Aided Design Models

    Science.gov (United States)

    Jones, William T.; Lazzara, David; Haimes, Robert

    2010-01-01

    The generation of design parameter sensitivity derivatives is required for gradient-based optimization. Such sensitivity derivatives are elusive at best when working with geometry defined within the solid modeling context of Computer-Aided Design (CAD) systems. Solid modeling CAD systems are often proprietary and always complex, thereby necessitating ad hoc procedures to infer parameter sensitivity. A new perspective is presented that makes direct use of the hierarchical associativity of CAD features to trace their evolution and thereby track design parameter sensitivity. In contrast to ad hoc methods, this method provides a more concise procedure following the model design intent and determining the sensitivity of CAD geometry directly to its respective defining parameters.

  9. Computer- Aided Design in Power Engineering Application of Software Tools

    CERN Document Server

    Stojkovic, Zlatan

    2012-01-01

    This textbooks demonstrates the application of software tools in solving a series of problems from the field of designing power system structures and systems. It contains four chapters: The first chapter leads the reader through all the phases necessary in the procedures of computer aided modeling and simulation. It guides through the complex problems presenting on the basis of eleven original examples. The second chapter presents  application of software tools in power system calculations of power systems equipment design. Several design example calculations are carried out using engineering standards like MATLAB, EMTP/ATP, Excel & Access, AutoCAD and Simulink. The third chapters focuses on the graphical documentation using a collection of software tools (AutoCAD, EPLAN, SIMARIS SIVACON, SIMARIS DESIGN) which enable the complete automation of the development of graphical documentation of a power systems. In the fourth chapter, the application of software tools in the project management in power systems ...

  10. Computer-aided diagnosis in chest radiography: Beyond nodules

    Energy Technology Data Exchange (ETDEWEB)

    Ginneken, Bram van [University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands)], E-mail: bram@isi.uu.nl; Hogeweg, Laurens; Prokop, Mathias [University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands)

    2009-11-15

    Chest radiographs are the most common exam in radiology. They are essential for the management of various diseases associated with high mortality and morbidity and display a wide range of findings, many of them subtle. In this survey we identify a number of areas beyond pulmonary nodules that could benefit from computer-aided detection and diagnosis (CAD) in chest radiography. These include interstitial infiltrates, catheter tip detection, size measurements, detection of pneumothorax and detection and quantification of emphysema. Recent work in these areas is surveyed, but we conclude that the amount of research devoted to these topics is modest. Reasons for the slow pace of CAD development in chest radiography beyond nodules are discussed.

  11. Computer aided earthmoving systems - mine reclamation in a digital age

    Energy Technology Data Exchange (ETDEWEB)

    Thompson, James E.; Witler, Michael H. [MWH Americas Inc., (United States)

    2010-07-01

    Mine reclamation is an increasingly important component of a successful mine closeout. The utilization of mine production equipment equipped with computer aided earthmoving system software (CAES) is useful to complete large-scale tailing dam reclamation. This paper illustrated the use of the CAES system for reclamation projects at mine sites in the United States. These case studies provided useful examples of the benefits a mining company can realize by self-performing their tailings impoundment and waste rock stockpile reclamation with their CAES equipped mine production equipment. This paper reviewed the CAES technology and its different applications following the system version. It was demonstrated that the utilization of the CAES system in reclamation projects gives the reclamation and construction teams the ability to manage the large scale mining equipment efficiently and insures that the construction is completed in accordance with the design.

  12. Decision trees and integrated features for computer aided mammographic screening

    Energy Technology Data Exchange (ETDEWEB)

    Kegelmeyer, W.P. Jr.; Groshong, B.; Allmen, M.; Woods, K.

    1997-02-01

    Breast cancer is a serious problem, which in the United States causes 43,000 deaths a year, eventually striking 1 in 9 women. Early detection is the only effective countermeasure, and mass mammography screening is the only reliable means for early detection. Mass screening has many shortcomings which could be addressed by a computer-aided mammographic screening system. Accordingly, we have applied the pattern recognition methods developed in earlier investigations of speculated lesions in mammograms to the detection of microcalcifications and circumscribed masses, generating new, more rigorous and uniform methods for the detection of both those signs. We have also improved the pattern recognition methods themselves, through the development of a new approach to combinations of multiple classifiers.

  13. Computer-aided strength analysis of the modernized freight wagon

    Science.gov (United States)

    Płaczek, M.; Wróbel, A.; Baier, A.

    2015-11-01

    In the paper results of computer-aided strength analysis of the modernized freight wagon based on Finite Element Method are presented. CAD model of the considered freight wagon was created and its strength was analysed in agreement with norms described the way of such kind of freight wagons testing. Then, the model of the analysed freight wagon was modernized by adding composite panels covering the inner surface of the vehicle body. Strength analysis was carried out once again and obtained results were juxtaposed. This work was carried out in order to verify the influence of composite panels on the strength of the freight car body and to estimate the possibility of reducing the steel shell thickness of the box in order to reduce weight of the freight wagon.

  14. Computer-Aided Multiscale Modelling for Chemical Process Engineering

    DEFF Research Database (Denmark)

    Morales Rodriguez, Ricardo; Gani, Rafiqul

    2007-01-01

    Chemical processes are generally modeled through monoscale approaches, which, while not adequate, satisfy a useful role in product-process design. In this case, use of a multi-dimensional and multi-scale model-based approach has importance in product-process development. A computer-aided framework...... for model generation, analysis, solution and implementation is necessary for the development and application of the desired model-based approach for product-centric process design/analysis. This goal is achieved through the combination of a system for model development (ModDev), and a modelling tool...... (MoT) for model translation, analysis and solution. The integration of ModDev, MoT and ICAS or any other external software or process simulator (using COM-Objects) permits the generation of different models and/or process configurations for purposes of simulation, design and analysis. Consequently, it...

  15. Computer aided planning and navigation for orbito-zygomatic reconstruction

    CERN Document Server

    Marecaux, Christophe; Payan, Yohan; Boutault, Franck

    2007-01-01

    This paper suggests a full protocol of Computer Aided Surgery as previously recommended in literature addressing the challenging task of primary or secondary reconstruction of orbito-zygomatic dislocation. First, on a specifically developed planning software, the best zygoma reduction and orbital boundaries reconstruction to achieve skeletal symmetry are determined. This treatment plan is then transferred to the 3D Navigation Systems within the operating room. After patient's anatomy registration to his preoperative CT scan data, the navigation system allows zygomatic guiding to its planned reduced location and bone orbital volume restoration control. The feasibility of this technique was checked in 3 patients with major orbito-zygomatic deformities. Preliminary clinical results are presented.

  16. Micro computer aided beam transport for the SF cyclotron

    International Nuclear Information System (INIS)

    An improvement of the beam transport system for the SF cyclotron is described. The system was designed to handle on-line alignment of the beam extracted from the SF cyclotron onto the optical axis of the transport line. It also enables to measure the beam emittance. The measurement of the emittance parameters is in particular necessary to calculate the beam optics. The calculation has been modified to become easy to handle. With the help of the computer-aided on-line beam profile measurement system, the operation of the beam transport system is very subservient to shorten the beam-tuning time and to improve the beam-transmission efficiency and the quality. (author)

  17. Computer aided design around the A 300 Airbus

    International Nuclear Information System (INIS)

    More than thirteen years after the launching of the first AIRBUS development a survey of CAD/CAM introduction and operation at AEROSPATIALE, Aircraft Division, is conducted. The following points are reviewed: - short description of AEROSPATIALE Aircraft Division - technical level and limits reached with the Concorde programm - first CAD experience and the decision to proceed and generalize CAD/CAM techniques towards computer aided engineering (CAE) - CAE basic concepts. Then is shown the implementation of CAE in the structural, aerodynamic and electrical fields in response to the growing success of the various Airbus programs and in front of an everyday tougher competition. After a description of the to-day situation and a first estimate of CAE benefits, special attention is devoted to the difficulties encountered with both hardware and software used in the system involved. To conclude and attempt is made to define the respective roles of the system buyer and vendor in the CAD/CAM field. (orig.)

  18. Use of computer-aided-engineering (CAE) for configuration management

    International Nuclear Information System (INIS)

    For nearly 25 years, Electricite de France (EDF) has been designing and building nuclear power plants, and now has more than 50 in operation. During this period, EDF has faced problems common to all designers and operators. The author discusses two major aspects which must be dealt with to design a power plant: installation design and operational description. In both cases, the designer has to ensure that all parameters conform to the design requirements and that all documents are consistent with each other. For the operational description, the most important part of the job is to check and maintain consistency between the various documents: P and ID's, functional diagrams, cable networks, procedures, data management and also installation drawings. The author discusses how EDF has chosen two computer aided design softwares---PDMS and PHENIX---and has built a powerful engineering system around them

  19. Computer-aided Reverse Engineering for Rapid Replacement of Parts

    Directory of Open Access Journals (Sweden)

    D.K. Pal

    2006-04-01

    Full Text Available Indigenous product development using conventional means involves a relatively long leadtime and cost, especially for replacing worn out and broken parts. This paper presentsmethodologies and technologies for computer-aided reverse engineering, illustrated by a reallifecase study of an aluminium alloy separator body of a hydraulic filter assembly for the specialarmy vehicle. It involved reconstruction of part geometry using 3-D scanning, materialidentification using spectrometry, casting process optimisation using simulation software, andfabrication of prototype and tooling using rapid prototyping systems. It was found that thefabrication of wax patterns directly from reverse-engineered CAD data in a suitable rapidprototyping system (such as thermojet, followed by conventional investment casting, gives areliable and economic route for rapid development of one-off intricate parts for the replacementpurpose.

  20. Fundamental limitations in developing computer-aided detection for mammography

    International Nuclear Information System (INIS)

    While asymptomatic screening with mammography has been proven to reduce breast cancer mortality, radiologists miss cancers when reading screening mammograms. Computer-aided detection (CADe) is being developed to help radiologists avoid overlooking a cancer. In this paper, we describe two overarching issues that limit the current development of CADe schemes. These are the inability to optimize a scheme for clinical impact - current methods only optimize for how well the CADe scheme works in the absence of a radiologist - and the lack of a figure of merit that quantifies the performance efficiency of the CADe scheme. Such a figure of merit could be used to determine how much better performance a CADe scheme could obtain, at least in theory, and which component of the several techniques employed in the CADe scheme is the weakest link.

  1. Computer-aided optimization of gas chromatographic separation

    International Nuclear Information System (INIS)

    The use of computer-aided optimization of separations has become widely used in liquid chromatography (LC) in the past few years, but its application is seldom used in gas chromatography (GC). In LC, adjustment of isocratic mobile phase strength and gradient steepness is a powerful technique to control relative peak spacing (selectivity). In contrast, improvement of GC separation usually is achieved by increasing the column plate number (via increases in column length), and/or by changing the column type. In this paper, we will discuss examples of isothermal, temperature programmed, and multi-step temperature programmed optimization of GC separation. These results will be compared to those obtained by LC using commercial software

  2. Computer Aided Design of Computer Generated Holograms for electron beam fabrication

    Science.gov (United States)

    Urquhart, Kristopher S.; Lee, Sing H.; Guest, Clark C.; Feldman, Michael R.; Farhoosh, Hamid

    1989-01-01

    Computer Aided Design (CAD) systems that have been developed for electrical and mechanical design tasks are also effective tools for the process of designing Computer Generated Holograms (CGHs), particularly when these holograms are to be fabricated using electron beam lithography. CAD workstations provide efficient and convenient means of computing, storing, displaying, and preparing for fabrication many of the features that are common to CGH designs. Experience gained in the process of designing CGHs with various types of encoding methods is presented. Suggestions are made so that future workstations may further accommodate the CGH design process.

  3. Micrometric precision of prosthetic dental crowns obtained by optical scanning and computer-aided designing/computer-aided manufacturing system

    Science.gov (United States)

    das Neves, Flávio Domingues; de Almeida Prado Naves Carneiro, Thiago; do Prado, Célio Jesus; Prudente, Marcel Santana; Zancopé, Karla; Davi, Letícia Resende; Mendonça, Gustavo; Soares, Carlos José

    2014-08-01

    The current study evaluated prosthetic dental crowns obtained by optical scanning and a computer-aided designing/computer-aided manufacturing system using micro-computed tomography to compare the marginal fit. The virtual models were obtained with four different scanning surfaces: typodont (T), regular impressions (RI), master casts (MC), and powdered master casts (PMC). Five virtual models were obtained for each group. For each model, a crown was designed on the software and milled from feldspathic ceramic blocks. Micro-CT images were obtained for marginal gap measurements and the data were statistically analyzed by one-way analysis of variance followed by Tukey's test. The mean vertical misfit was T=62.6±65.2 μm; MC=60.4±38.4 μm; PMC=58.1±38.0 μm, and RI=89.8±62.8 μm. Considering a percentage of vertical marginal gap of up to 75 μm, the results were T=71.5%, RI=49.2%, MC=69.6%, and PMC=71.2%. The percentages of horizontal overextension were T=8.5%, RI=0%, MC=0.8%, and PMC=3.8%. Based on the results, virtual model acquisition by scanning the typodont (simulated mouth) or MC, with or without powder, showed acceptable values for the marginal gap. The higher result of marginal gap of the RI group suggests that it is preferable to scan this directly from the mouth or from MC.

  4. Computer-aided diagnosis of alcoholism-related EEG signals.

    Science.gov (United States)

    Acharya, U Rajendra; S, Vidya; Bhat, Shreya; Adeli, Hojjat; Adeli, Amir

    2014-12-01

    Alcoholism is a severe disorder that affects the functionality of neurons in the central nervous system (CNS) and alters the behavior of the affected person. Electroencephalogram (EEG) signals can be used as a diagnostic tool in the evaluation of subjects with alcoholism. The neurophysiological interpretation of EEG signals in persons with alcoholism (PWA) is based on observation and interpretation of the frequency and power in their EEGs compared to EEG signals from persons without alcoholism. This paper presents a review of the known features of EEGs obtained from PWA and proposes that the impact of alcoholism on the brain can be determined by computer-aided analysis of EEGs through extracting the minute variations in the EEG signals that can differentiate the EEGs of PWA from those of nonaffected persons. The authors advance the idea of automated computer-aided diagnosis (CAD) of alcoholism by employing the EEG signals. This is achieved through judicious combination of signal processing techniques such as wavelet, nonlinear dynamics, and chaos theory and pattern recognition and classification techniques. A CAD system is cost-effective and efficient and can be used as a decision support system by physicians in the diagnosis and treatment of alcoholism especially those who do not specialize in alcoholism or neurophysiology. It can also be of great value to rehabilitation centers to assess PWA over time and to monitor the impact of treatment aimed at minimizing or reversing the effects of the disease on the brain. A CAD system can be used to determine the extent of alcoholism-related changes in EEG signals (low, medium, high) and the effectiveness of therapeutic plans. PMID:25461226

  5. Recent Developments on Computer Aided Fixture Design: Case Based Reasoning Approaches

    OpenAIRE

    Heidar Hashemi; Awaluddin Mohamed Shaharoun; Izman, S.; Denni Kurniawan

    2014-01-01

    Fixture design is an important issue in the process of manufacturing. As a critical design activity process, automation in fixture design plays an integral role in linking computer aided designs and computer aided manufacturing. This paper carries out a literature review of computer aided fixture design (CAFD) developments using intelligent methods that have been commonly utilized in automation in the last two decades. The first part of this review considers the steps of fixture design along ...

  6. Computer-aided diagnosis and artificial intelligence in clinical imaging.

    Science.gov (United States)

    Shiraishi, Junji; Li, Qiang; Appelbaum, Daniel; Doi, Kunio

    2011-11-01

    Computer-aided diagnosis (CAD) is rapidly entering the radiology mainstream. It has already become a part of the routine clinical work for the detection of breast cancer with mammograms. The computer output is used as a "second opinion" in assisting radiologists' image interpretations. The computer algorithm generally consists of several steps that may include image processing, image feature analysis, and data classification via the use of tools such as artificial neural networks (ANN). In this article, we will explore these and other current processes that have come to be referred to as "artificial intelligence." One element of CAD, temporal subtraction, has been applied for enhancing interval changes and for suppressing unchanged structures (eg, normal structures) between 2 successive radiologic images. To reduce misregistration artifacts on the temporal subtraction images, a nonlinear image warping technique for matching the previous image to the current one has been developed. Development of the temporal subtraction method originated with chest radiographs, with the method subsequently being applied to chest computed tomography (CT) and nuclear medicine bone scans. The usefulness of the temporal subtraction method for bone scans was demonstrated by an observer study in which reading times and diagnostic accuracy improved significantly. An additional prospective clinical study verified that the temporal subtraction image could be used as a "second opinion" by radiologists with negligible detrimental effects. ANN was first used in 1990 for computerized differential diagnosis of interstitial lung diseases in CAD. Since then, ANN has been widely used in CAD schemes for the detection and diagnosis of various diseases in different imaging modalities, including the differential diagnosis of lung nodules and interstitial lung diseases in chest radiography, CT, and position emission tomography/CT. It is likely that CAD will be integrated into picture archiving and

  7. Development of computer-aided diagnosis systems in radiology

    International Nuclear Information System (INIS)

    Computer-aided diagnosis (CAD) is a practice done by medical doctors based on computer image analysis as the second opinion, and CAD studies have been government-adopted projects. CAD is already on popular practice in the cancers of the breast by mammography, lung by flat plate and CT images, and large bowel by CT colonoscopy. This paper describes four examples of authors' actual CAD investigations. First, the temporal subtraction image analysis by CAD is for the detection of abnormality in the chest by radiographs taken at different times. Examples are shown in cases of interstitial pneumonia and lung cancer out of 34 patients with diffuse lung diseases. Second, development of CAD system is recorded for detection of aneurysm by the brain MR angiography (MRA). Third is the CAD detection of fascicles in cerebral white matters by the diffuse tensor MRI, which will help the surgery for brain tumors. Final is an automated patient recognition based on an image-matching technique using previous chest radiographs in the picture archiving and communication systems. This is on the radiograph giving biological fingerprints of the patients. CAD will be applied in a wider field of medicare not only in imaging technology. (T.I)

  8. A handheld computer-aided diagnosis system and simulated analysis

    Science.gov (United States)

    Su, Mingjian; Zhang, Xuejun; Liu, Brent; Su, Kening; Louie, Ryan

    2016-03-01

    This paper describes a Computer Aided Diagnosis (CAD) system based on cellphone and distributed cluster. One of the bottlenecks in building a CAD system for clinical practice is the storage and process of mass pathology samples freely among different devices, and normal pattern matching algorithm on large scale image set is very time consuming. Distributed computation on cluster has demonstrated the ability to relieve this bottleneck. We develop a system enabling the user to compare the mass image to a dataset with feature table by sending datasets to Generic Data Handler Module in Hadoop, where the pattern recognition is undertaken for the detection of skin diseases. A single and combination retrieval algorithm to data pipeline base on Map Reduce framework is used in our system in order to make optimal choice between recognition accuracy and system cost. The profile of lesion area is drawn by doctors manually on the screen, and then uploads this pattern to the server. In our evaluation experiment, an accuracy of 75% diagnosis hit rate is obtained by testing 100 patients with skin illness. Our system has the potential help in building a novel medical image dataset by collecting large amounts of gold standard during medical diagnosis. Once the project is online, the participants are free to join and eventually an abundant sample dataset will soon be gathered enough for learning. These results demonstrate our technology is very promising and expected to be used in clinical practice.

  9. The promise of computer aided detection in digital mammography

    International Nuclear Information System (INIS)

    Computer-aided detection (CAD) is a new technology now being implemented in many clinics to reduce the false negative rate in mammography screening. A large clinical study has been completed which shows that a substantial false negative (miss) rate exists in screening mammography, a significant fraction of the missed cancers are not subtle, and CAD has high sensitivity to these missed cancers. Full field digital mammography is now coming on the scene, but has not yet been proven in clinical practice. The authors believe that full acceptance of the new digital technology depends not merely on demonstrations of 'substantial equivalence' to film-screen technology, but rather on more complete exploitation of the unique advantages of digital technology, and that CAD can play a key role. These advantages derive from CAD's ability to quickly (in near real-time) perform analytical computations on digital information that is not readily available to the radiologist until after the cost of film-processing has occurred

  10. Accelerating Battery Design Using Computer-Aided Engineering Tools: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Pesaran, A.; Heon, G. H.; Smith, K.

    2011-01-01

    Computer-aided engineering (CAE) is a proven pathway, especially in the automotive industry, to improve performance by resolving the relevant physics in complex systems, shortening the product development design cycle, thus reducing cost, and providing an efficient way to evaluate parameters for robust designs. Academic models include the relevant physics details, but neglect engineering complexities. Industry models include the relevant macroscopic geometry and system conditions, but simplify the fundamental physics too much. Most of the CAE battery tools for in-house use are custom model codes and require expert users. There is a need to make these battery modeling and design tools more accessible to end users such as battery developers, pack integrators, and vehicle makers. Developing integrated and physics-based CAE battery tools can reduce the design, build, test, break, re-design, re-build, and re-test cycle and help lower costs. NREL has been involved in developing various models to predict the thermal and electrochemical performance of large-format cells and has used in commercial three-dimensional finite-element analysis and computational fluid dynamics to study battery pack thermal issues. These NREL cell and pack design tools can be integrated to help support the automotive industry and to accelerate battery design.

  11. Computer-aided Teaching of Math in Electromechanics Vocational Course

    Directory of Open Access Journals (Sweden)

    Eduardo Shigueo Hoji

    2013-03-01

    Full Text Available This paper describes the experience of teaching mathematics in the electromechanics vocational course with aid of the computer. Instead of giving a bunch of equations and a calculator to the students, as it is usual in vocational courses, we offer them Octave, which is a numerical computational tool. Furthermore, the mathematical concepts involved in the solution of applied problems are provided within a multidisciplinary framework. The proposed approach helped to reduce the abstraction of mathematics for the students. Despite the deficiencies the students in vocational courses have in their formation, we could notice that their perception regarding mathematics has changed after figuring out that “a bunch of numbers” can be useful in the solution of problems they shall face in their professional life. The approach was applied to three groups already. All of them are composed of mature students, who passed by a flawed basic educational system and stayed away from school for a long time.

  12. Computer-Aided Sensor Development Focused on Security Issues.

    Science.gov (United States)

    Bialas, Andrzej

    2016-01-01

    The paper examines intelligent sensor and sensor system development according to the Common Criteria methodology, which is the basic security assurance methodology for IT products and systems. The paper presents how the development process can be supported by software tools, design patterns and knowledge engineering. The automation of this process brings cost-, quality-, and time-related advantages, because the most difficult and most laborious activities are software-supported and the design reusability is growing. The paper includes a short introduction to the Common Criteria methodology and its sensor-related applications. In the experimental section the computer-supported and patterns-based IT security development process is presented using the example of an intelligent methane detection sensor. This process is supported by an ontology-based tool for security modeling and analyses. The verified and justified models are transferred straight to the security target specification representing security requirements for the IT product. The novelty of the paper is to provide a patterns-based and computer-aided methodology for the sensors development with a view to achieving their IT security assurance. The paper summarizes the validation experiment focused on this methodology adapted for the sensors system development, and presents directions of future research. PMID:27240360

  13. Influence of different luting protocols on shear bond strength of computer aided design/computer aided manufacturing resin nanoceramic material to dentin

    OpenAIRE

    Claudio Poggio; Marco Pigozzo; Matteo Ceci; Andrea Scribante; Riccardo Beltrami; Marco Chiesa

    2016-01-01

    Background: The purpose of this study was to evaluate the influence of three different luting protocols on shear bond strength of computer aided design/computer aided manufacturing (CAD/CAM) resin nanoceramic (RNC) material to dentin. Materials and Methods: In this in vitro study, 30 disks were milled from RNC blocks (Lava Ultimate/3M ESPE) with CAD/CAM technology. The disks were subsequently cemented to the exposed dentin of 30 recently extracted bovine permanent mandibular incisors. The...

  14. Development of computer-aided auto-ranging technique for a computed radiography system

    International Nuclear Information System (INIS)

    For a computed radiography system, the authors developed a computer-aided autoranging technique in which the clinically useful image data are automatically mapped to the available display range. The preread image data are inspected to determine the location of collimation. A histogram of the pixels inside the collimation is evaluated regarding characteristic values such as maxima and minima, and then the optimal density and contrast are derived for the display image. The effect of the autoranging technique was investigated at several hospitals in Japan. The average rate of films lost due to undesirable density or contrast was about 0.5%

  15. Computer-Aided Construction of Chemical Kinetic Models

    Energy Technology Data Exchange (ETDEWEB)

    Green, William H. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    2014-12-31

    The combustion chemistry of even simple fuels can be extremely complex, involving hundreds or thousands of kinetically significant species. The most reasonable way to deal with this complexity is to use a computer not only to numerically solve the kinetic model, but also to construct the kinetic model in the first place. Because these large models contain so many numerical parameters (e.g. rate coefficients, thermochemistry) one never has sufficient data to uniquely determine them all experimentally. Instead one must work in “predictive” mode, using theoretical rather than experimental values for many of the numbers in the model, and as appropriate refining the most sensitive numbers through experiments. Predictive chemical kinetics is exactly what is needed for computer-aided design of combustion systems based on proposed alternative fuels, particularly for early assessment of the value and viability of proposed new fuels before those fuels are commercially available. This project was aimed at making accurate predictive chemical kinetics practical; this is a challenging goal which requires a range of science advances. The project spanned a wide range from quantum chemical calculations on individual molecules and elementary-step reactions, through the development of improved rate/thermo calculation procedures, the creation of algorithms and software for constructing and solving kinetic simulations, the invention of methods for model-reduction while maintaining error control, and finally comparisons with experiment. Many of the parameters in the models were derived from quantum chemistry calculations, and the models were compared with experimental data measured in our lab or in collaboration with others.

  16. Quantitative analysis of ultrasound images for computer-aided diagnosis.

    Science.gov (United States)

    Wu, Jie Ying; Tuomi, Adam; Beland, Michael D; Konrad, Joseph; Glidden, David; Grand, David; Merck, Derek

    2016-01-01

    We propose an adaptable framework for analyzing ultrasound (US) images quantitatively to provide computer-aided diagnosis using machine learning. Our preliminary clinical targets are hepatic steatosis, adenomyosis, and craniosynostosis. For steatosis and adenomyosis, we collected US studies from 288 and 88 patients, respectively, as well as their biopsy or magnetic resonanceconfirmed diagnosis. Radiologists identified a region of interest (ROI) on each image. We filtered the US images for various texture responses and use the pixel intensity distribution within each ROI as feature parameterizations. Our craniosynostosis dataset consisted of 22 CT-confirmed cases and 22 age-matched controls. One physician manually measured the vectors from the center of the skull to the outer cortex at every 10 deg for each image and we used the principal directions as shape features for parameterization. These parameters and the known diagnosis were used to train classifiers. Testing with cross-validation, we obtained 72.74% accuracy and 0.71 area under receiver operating characteristics curve for steatosis ([Formula: see text]), 77.27% and 0.77 for adenomyosis ([Formula: see text]), and 88.63% and 0.89 for craniosynostosis ([Formula: see text]). Our framework is able to detect a variety of diseases with high accuracy. We hope to include it as a routinely available support system in the clinic. PMID:26835502

  17. Computer-aided decision system for the clubfeet deformities.

    Science.gov (United States)

    Dao, Tien Tuan; Marin, Frédéric; Bensahel, Henri; Ho Ba Tho, Marie Christine

    2011-01-01

    A computer-aided decision system (CADS) based on ontology in pediatric orthopedics was developed to assess, without assumptions performed, the abnormalities of the musculoskeletal system of lower limbs. The CADS consists of four components. The first component is a diagnosis-based ontology, called Ontologie du Système Musculosquelettique des Membres Inférieurs (OSMMI). The second component is a database for collecting clinical observations, e.g., the birth classification of the clubfeet deformities. The third component uses statistical methods (principal component analysis and decision tree) for constructing an approach to evaluate new issues. The last component is an interactive module for managing the interaction between patients, experts, and the due CADS. Our system has been validated clinically with the real patient data obtained from the Infant Surgery Service in the hospital of Robert Debré in Paris. Our CADS is a good solution to compare the studies of the clubfeet deformities before and after the treatment using a universally scoring system. The assessment, conservative treatment, and monitoring were set up. Our system was developed to allow a better assessment for improving the knowledge and thus the evaluation and treatment of the musculoskeletal pathologies, e.g., the clubfeet deformities. PMID:21431604

  18. The future of computer-aided sperm analysis

    Science.gov (United States)

    Mortimer, Sharon T; van der Horst, Gerhard; Mortimer, David

    2015-01-01

    Computer-aided sperm analysis (CASA) technology was developed in the late 1980s for analyzing sperm movement characteristics or kinematics and has been highly successful in enabling this field of research. CASA has also been used with great success for measuring semen characteristics such as sperm concentration and proportions of progressive motility in many animal species, including wide application in domesticated animal production laboratories and reproductive toxicology. However, attempts to use CASA for human clinical semen analysis have largely met with poor success due to the inherent difficulties presented by many human semen samples caused by sperm clumping and heavy background debris that, until now, have precluded accurate digital image analysis. The authors review the improved capabilities of two modern CASA platforms (Hamilton Thorne CASA-II and Microptic SCA6) and consider their current and future applications with particular reference to directing our focus towards using this technology to assess functional rather than simple descriptive characteristics of spermatozoa. Specific requirements for validating CASA technology as a semi-automated system for human semen analysis are also provided, with particular reference to the accuracy and uncertainty of measurement expected of a robust medical laboratory test for implementation in clinical laboratories operating according to modern accreditation standards. PMID:25926614

  19. The future of computer-aided sperm analysis

    Directory of Open Access Journals (Sweden)

    Sharon T Mortimer

    2015-01-01

    Full Text Available Computer-aided sperm analysis (CASA technology was developed in the late 1980s for analyzing sperm movement characteristics or kinematics and has been highly successful in enabling this field of research. CASA has also been used with great success for measuring semen characteristics such as sperm concentration and proportions of progressive motility in many animal species, including wide application in domesticated animal production laboratories and reproductive toxicology. However, attempts to use CASA for human clinical semen analysis have largely met with poor success due to the inherent difficulties presented by many human semen samples caused by sperm clumping and heavy background debris that, until now, have precluded accurate digital image analysis. The authors review the improved capabilities of two modern CASA platforms (Hamilton Thorne CASA-II and Microptic SCA6 and consider their current and future applications with particular reference to directing our focus towards using this technology to assess functional rather than simple descriptive characteristics of spermatozoa. Specific requirements for validating CASA technology as a semi-automated system for human semen analysis are also provided, with particular reference to the accuracy and uncertainty of measurement expected of a robust medical laboratory test for implementation in clinical laboratories operating according to modern accreditation standards.

  20. Computer-aided design of a coffee-dragging device

    Directory of Open Access Journals (Sweden)

    Marcus Vinicuis Morais de Oliveira

    2014-10-01

    Full Text Available Dragging is the most costly and time-consuming stage of the coffee harvest. Therefore, its mechanization is important. The objectives of this study were to design, build, and evaluate the dynamics of a coffee-dragging device in a laboratory setting. The prototype consists of a dragging device with rods mounted on a metal plate and a chassis. Computer-aided design (CAD software was used to generate a solid second-order tetrahedral mesh for use in finite element analyses of the device and its parts. It was possible to simulate and display the device’s errors and failures and generate data on part deformities, Von Mises tension, and equivalent efforts. Equations based on the Denavit–Hartenberg theory were developed to describe the dragging device kinematics, and the results obtained with these equations were compared to those for the design developed using the software program. A preliminary drawing analysis identified a lever-type system as the best configuration for the device, based on its simple construction and its ability to balance the weight of the project parts. The safety factor achieved was greater than 28. Adjustment of the vibration amplitude of the rods is possible using the eccentric shaft of the connecting rod drive. Finite element analyses was used to analyze the connecting rod and predict the likely failure points.

  1. Computer aided morphometry of the neonatal fetal alcohol syndrome face

    Science.gov (United States)

    Chik, Lawrence; Sokol, Robert J.; Martier, Susan S.

    1993-09-01

    Facial dysmorphology related to Fetal Alcohol Syndrome (FAS) has been studied from neonatal snapshots with computer-aided imaging tools by looking at facial landmarks and silhouettes. Statistical methods were used to characterize FAS-related midfacial hypoplasia by using standardized landmark coordinates of frontal and profile snapshots. Additional analyses were performed by tracing a segment of the facial silhouettes from the profile snapshots. In spite of inherent distortions due to the coordinate standardization procedure, controlled for race, three significant facial landmark coordinates accounted for 30.6% of the explained variance of FAS. Residualized for race, eight points along the silhouettes were shown to be significant in explaining 45.8% of the outcome variance. Combining the landmark coordinates and silhouettes points, 57% of the outcome variance was explained. Finally, including birthweight with landmark coordinates and silhouettes, 63% of the outcome variance was explained, with a jackknifed sensitivity of 95% (19/20) and a specificity of 92.9% (52/56).

  2. Computer Aided Dosimetry and Verification of Exposure to Radiation

    Science.gov (United States)

    Waller, Edward; Stodilka, Robert Z.; Leach, Karen E.; Lalonde, Louise

    2002-06-01

    In the timeframe following the September 11th attacks on the United States, increased emphasis has been placed on Chemical, Biological, Radiological and Nuclear (CBRN) preparedness. Of prime importance is rapid field assessment of potential radiation exposure to Canadian Forces field personnel. This work set up a framework for generating an 'expert' computer system for aiding and assisting field personnel in determining the extent of radiation insult to military personnel. Data was gathered by review of the available literature, discussions with medical and health physics personnel having hands-on experience dealing with radiation accident victims, and from experience of the principal investigator. Flow charts and generic data fusion algorithms were developed. Relationships between known exposure parameters, patient interview and history, clinical symptoms, clinical work-ups, physical dosimetry, biological dosimetry, and dose reconstruction as critical data indicators were investigated. The data obtained was examined in terms of information theory. A main goal was to determine how best to generate an adaptive model (i.e. when more data becomes available, how is the prediction improved). Consideration was given to determination of predictive algorithms for health outcome. In addition. the concept of coding an expert medical treatment advisor system was developed (U)

  3. Computer Aided Diagnosis System for Early Lung Cancer Detection

    Directory of Open Access Journals (Sweden)

    Fatma Taher

    2015-11-01

    Full Text Available Lung cancer continues to rank as the leading cause of cancer deaths worldwide. One of the most promising techniques for early detection of cancerous cells relies on sputum cell analysis. This was the motivation behind the design and the development of a new computer aided diagnosis (CAD system for early detection of lung cancer based on the analysis of sputum color images. The proposed CAD system encompasses four main processing steps. First is the preprocessing step which utilizes a Bayesian classification method using histogram analysis. Then, in the second step, mean shift segmentation is applied to segment the nuclei from the cytoplasm. The third step is the feature analysis. In this step, geometric and chromatic features are extracted from the nucleus region. These features are used in the diagnostic process of the sputum images. Finally, the diagnosis is completed using an artificial neural network and support vector machine (SVM for classifying the cells into benign or malignant. The performance of the system was analyzed based on different criteria such as sensitivity, specificity and accuracy. The evaluation was carried out using Receiver Operating Characteristic (ROC curve. The experimental results demonstrate the efficiency of the SVM classifier over other classifiers, with 97% sensitivity and accuracy as well as a significant reduction in the number of false positive and false negative rates.

  4. Efficacy of computer-aided detection system for screening mammography

    International Nuclear Information System (INIS)

    A study was conducted to evaluate the efficacy of a computer-aided detection (CAD) system for screening mammography (MMG). Screening mammograms of 2,231 women aged over 50 yr were examined. Medio-lateral oblique (MLO) images were obtained, and two expert observers interpreted the mammograms by consensus. First, each mammogram was interpreted without the assistance of CAD, followed immediately by a re-evaluation of areas marked by the CAD system. Data were recorded to measure the effect of CAD on the recall rate, cancer detection rate and detection rate of masses, microcalcifications and other findings. The CAD system increased the recall rate from 2.3% to 2.6%. Six recalled cases were diagnosed as breast cancer pathologically, and CAD detected all of these lesions. Seven additional cases in which CAD detected abnormal findings had no malignancy. The detection rate of CAD for microcalcifications was high (95.0%). However, the detection rate for mass lesions and other findings was low (29.2% and 25.0% respectively). The false positivity rate was 0.13/film for microcalcifications, and 0.25/film for mass lesions. The efficacy of the CAD system for detecting microcalcifications on screening mammograms was confirmed. However, the low detection rate of mass lesions and relatively high rate of false positivity need to be further improved. (author)

  5. Computer-aided photometric analysis of dynamic digital bioluminescent images

    Science.gov (United States)

    Gorski, Zbigniew; Bembnista, T.; Floryszak-Wieczorek, J.; Domanski, Marek; Slawinski, Janusz

    2003-04-01

    The paper deals with photometric and morphologic analysis of bioluminescent images obtained by registration of light radiated directly from some plant objects. Registration of images obtained from ultra-weak light sources by the single photon counting (SPC) technique is the subject of this work. The radiation is registered by use of a 16-bit charge coupled device (CCD) camera "Night Owl" together with WinLight EG&G Berthold software. Additional application-specific software has been developed in order to deal with objects that are changing during the exposition time. Advantages of the elaborated set of easy configurable tools named FCT for a computer-aided photometric and morphologic analysis of numerous series of quantitatively imperfect chemiluminescent images are described. Instructions are given how to use these tools and exemplified with several algorithms for the transformation of images library. Using the proposed FCT set, automatic photometric and morphologic analysis of the information hidden within series of chemiluminescent images reflecting defensive processes in poinsettia (Euphorbia pulcherrima Willd) leaves affected by a pathogenic fungus Botrytis cinerea is revealed.

  6. Enhancing Engineering Computer-Aided Design Education Using Lectures Recorded on the PC

    Science.gov (United States)

    McGrann, Roy T. R.

    2006-01-01

    Computer-Aided Engineering (CAE) is a course that is required during the third year in the mechanical engineering curriculum at Binghamton University. The primary objective of the course is to educate students in the procedures of computer-aided engineering design. The solid modeling and analysis program Pro/Engineer[TM] (PTC[R]) is used as the…

  7. Computer-aided instrumentation and control of nuclear power plants - status and trends

    International Nuclear Information System (INIS)

    This progress report discusses status and trends of current computer-aided instrumentation and control for nuclear power plants based on general requirements for advanced process instrumentation and process concepts. In the analysis of concrete designs the considerations focus to the following topics: Computer-aided information systems, process monitoring and operator services. (orig.)

  8. Computer-aided Framework for Design of Pure, Mixed and Blended Products

    DEFF Research Database (Denmark)

    Cignitti, Stefano; Zhang, Lei; Gani, Rafiqul

    2015-01-01

    This paper presents a framework for computer-aided design of pure, mixed and blended chemical based products. The framework is a systematic approach to convert a Computer-aided Molecular, Mixture and Blend Design (CAMbD) formulation, based on needs and target properties, into a mixed integer non...

  9. Computer-Presented Organizational/Memory Aids as Instruction for Solving Pico-Fomi Problems.

    Science.gov (United States)

    Steinberg, Esther R.; And Others

    1985-01-01

    Describes investigation of effectiveness of computer-presented organizational/memory aids (matrix and verbal charts controlled by computer or learner) as instructional technique for solving Pico-Fomi problems, and the acquisition of deductive inference rules when such aids are present. Results indicate chart use control should be adapted to…

  10. Teaching Computer-Aided Design of Fluid Flow and Heat Transfer Engineering Equipment.

    Science.gov (United States)

    Gosman, A. D.; And Others

    1979-01-01

    Describes a teaching program for fluid mechanics and heat transfer which contains both computer aided learning (CAL) and computer aided design (CAD) components and argues that the understanding of the physical and numerical modeling taught in the CAL course is essential to the proper implementation of CAD. (Author/CMV)

  11. CAIs in Semarkona (LL3.0)

    Science.gov (United States)

    Mishra, R. K.; Simon, J. I.; Ross, D. K.; Marhas, K. K.

    2016-01-01

    Calcium, Aluminum-rich inclusions (CAIs) are the first forming solids of the Solar system. Their observed abundance, mean size, and mineralogy vary quite significantly between different groups of chondrites. These differences may reflect the dynamics and distinct cosmochemical conditions present in the region(s) of the protoplanetary disk from which each type likely accreted. Only about 11 such objects have been found in L and LL type while another 57 have been found in H type ordinary chondrites, compared to thousands in carbonaceous chondrites. At issue is whether the rare CAIs contained in ordinary chondrites truly reflect a distinct population from the inclusions commonly found in other chondrite types. Semarkona (LL3.00) (fall, 691 g) is the most pristine chondrite available in our meteorite collection. Here we report petrography and mineralogy of 3 CAIs from Semarkona

  12. AIDS

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/000594.htm HIV/AIDS To use the sharing features on this page, ... immunodeficiency virus (HIV) is the virus that causes AIDS. When a person becomes infected with HIV, the ...

  13. Computer-aided pulmonary image analysis in small animal models

    International Nuclear Information System (INIS)

    Purpose: To develop an automated pulmonary image analysis framework for infectious lung diseases in small animal models. Methods: The authors describe a novel pathological lung and airway segmentation method for small animals. The proposed framework includes identification of abnormal imaging patterns pertaining to infectious lung diseases. First, the authors’ system estimates an expected lung volume by utilizing a regression function between total lung capacity and approximated rib cage volume. A significant difference between the expected lung volume and the initial lung segmentation indicates the presence of severe pathology, and invokes a machine learning based abnormal imaging pattern detection system next. The final stage of the proposed framework is the automatic extraction of airway tree for which new affinity relationships within the fuzzy connectedness image segmentation framework are proposed by combining Hessian and gray-scale morphological reconstruction filters. Results: 133 CT scans were collected from four different studies encompassing a wide spectrum of pulmonary abnormalities pertaining to two commonly used small animal models (ferret and rabbit). Sensitivity and specificity were greater than 90% for pathological lung segmentation (average dice similarity coefficient > 0.9). While qualitative visual assessments of airway tree extraction were performed by the participating expert radiologists, for quantitative evaluation the authors validated the proposed airway extraction method by using publicly available EXACT’09 data set. Conclusions: The authors developed a comprehensive computer-aided pulmonary image analysis framework for preclinical research applications. The proposed framework consists of automatic pathological lung segmentation and accurate airway tree extraction. The framework has high sensitivity and specificity; therefore, it can contribute advances in preclinical research in pulmonary diseases

  14. Computational thermodynamics aided design of novel ferritic alloys

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Ying [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Chen, Tianyi [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Tan, Lizhen [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2016-06-30

    With the aid of computational thermodynamics, Ni was identified to suppress the liquidus temperature of Fe2Zr and four Fe-Cr-Ni-Zr alloys were designed to study the Ni effect on the phase stability of Fe2Zr laves_phase. These alloys were fabricated through traditional arc-metling, followed by annealing at 1000 C for 336 hours and 700 C for 1275 hours. The microstructure were examined and characterized by SEM BSE image, EDS compositional mapping and point scan, XRD and TEM analysis. The major results were summarized below: 1)For investigated alloys with 12wt% Cr, 3~6wt% Zr and 3~9 wt%Ni, the phases in equilibrium with the BCC phase are C15_Laves phase, Fe23Zr6 phase. The volume fraction of intermetallic phases increases with Ni and Zr contents. 2)Instead of (Fe,Cr)2Zr C14_Laves phase, Ni stabilizes the C15_Laves structure in Fe-Cr-Ni-Zr alloys by substituting Fe and Cr atoms with Ni atoms in the first sublattice. 3)Fe23Zr6, that is metastable in the Fe-Cr-Zr ternary, is also stabilized by Ni addition. 4)Ni7Zr2 phase was observed in samples with high Ni/Zr ratio. Extensive solubility of Fe was identified in the phase. The microstructural and composition results obtained from this study will be incorportated into the the Fe-Cr-Ni-Zr database. The current samples will be subjected to ion irradiaition to be compared with those results for Fe-Cr-Zr alloys. Additional alloys will be designed to form (Fe,Cr,Ni)2Zr nanoprecipitates for further studies.

  15. Computer-aided pulmonary image analysis in small animal models

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Ziyue; Mansoor, Awais; Mollura, Daniel J. [Center for Infectious Disease Imaging (CIDI), Radiology and Imaging Sciences, National Institutes of Health (NIH), Bethesda, Maryland 32892 (United States); Bagci, Ulas, E-mail: ulasbagci@gmail.com [Center for Research in Computer Vision (CRCV), University of Central Florida (UCF), Orlando, Florida 32816 (United States); Kramer-Marek, Gabriela [The Institute of Cancer Research, London SW7 3RP (United Kingdom); Luna, Brian [Microfluidic Laboratory Automation, University of California-Irvine, Irvine, California 92697-2715 (United States); Kubler, Andre [Department of Medicine, Imperial College London, London SW7 2AZ (United Kingdom); Dey, Bappaditya; Jain, Sanjay [Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231 (United States); Foster, Brent [Department of Biomedical Engineering, University of California-Davis, Davis, California 95817 (United States); Papadakis, Georgios Z. [Radiology and Imaging Sciences, National Institutes of Health (NIH), Bethesda, Maryland 32892 (United States); Camp, Jeremy V. [Department of Microbiology and Immunology, University of Louisville, Louisville, Kentucky 40202 (United States); Jonsson, Colleen B. [National Institute for Mathematical and Biological Synthesis, University of Tennessee, Knoxville, Tennessee 37996 (United States); Bishai, William R. [Howard Hughes Medical Institute, Chevy Chase, Maryland 20815 and Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231 (United States); Udupa, Jayaram K. [Medical Image Processing Group, Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)

    2015-07-15

    Purpose: To develop an automated pulmonary image analysis framework for infectious lung diseases in small animal models. Methods: The authors describe a novel pathological lung and airway segmentation method for small animals. The proposed framework includes identification of abnormal imaging patterns pertaining to infectious lung diseases. First, the authors’ system estimates an expected lung volume by utilizing a regression function between total lung capacity and approximated rib cage volume. A significant difference between the expected lung volume and the initial lung segmentation indicates the presence of severe pathology, and invokes a machine learning based abnormal imaging pattern detection system next. The final stage of the proposed framework is the automatic extraction of airway tree for which new affinity relationships within the fuzzy connectedness image segmentation framework are proposed by combining Hessian and gray-scale morphological reconstruction filters. Results: 133 CT scans were collected from four different studies encompassing a wide spectrum of pulmonary abnormalities pertaining to two commonly used small animal models (ferret and rabbit). Sensitivity and specificity were greater than 90% for pathological lung segmentation (average dice similarity coefficient > 0.9). While qualitative visual assessments of airway tree extraction were performed by the participating expert radiologists, for quantitative evaluation the authors validated the proposed airway extraction method by using publicly available EXACT’09 data set. Conclusions: The authors developed a comprehensive computer-aided pulmonary image analysis framework for preclinical research applications. The proposed framework consists of automatic pathological lung segmentation and accurate airway tree extraction. The framework has high sensitivity and specificity; therefore, it can contribute advances in preclinical research in pulmonary diseases.

  16. Improved mammographic interpretation of masses using computer-aided diagnosis

    International Nuclear Information System (INIS)

    The aim of this study was to evaluate the effectiveness of computerized image enhancement, to investigate criteria for discriminating benign from malignant mammographic findings by computer-aided diagnosis (CAD), and to test the role of quantitative analysis in improving the accuracy of interpretation of mass lesions. Forty sequential mammographically detected mass lesions referred for biopsy were digitized at high resolution for computerized evaluation. A prototype CAD system which included image enhancement algorithms was used for a better visualization of the lesions. Quantitative features which characterize the spiculation were automatically extracted by the CAD system for a user-defined region of interest (ROI). Reference ranges for malignant and benign cases were acquired from data generated by 214 known retrospective cases. The extracted parameters together with the reference ranges were presented to the radiologist for the analysis of 40 prospective cases. A pattern recognition scheme based on discriminant analysis was trained on the 214 retrospective cases, and applied to the prospective cases. Accuracy of interpretation with and without the CAD system, as well as the performance of the pattern recognition scheme, were analyzed using receiver operating characteristics (ROC) curves. A significant difference (p z) increased significantly (p z for the results of the pattern recognition scheme was higher (0.95). The results indicate that there is an improved accuracy of diagnosis with the use of the mammographic CAD system above that of the unassisted radiologist. Our findings suggest that objective quantitative features extracted from digitized mammographic findings may help in differentiating between benign and malignant masses, and can assist the radiologist in the interpretation of mass lesions. (orig.)

  17. General purpose architecture for intelligent computer-aided training

    Science.gov (United States)

    Loftin, R. Bowen (Inventor); Wang, Lui (Inventor); Baffes, Paul T. (Inventor); Hua, Grace C. (Inventor)

    1994-01-01

    An intelligent computer-aided training system having a general modular architecture is provided for use in a wide variety of training tasks and environments. It is comprised of a user interface which permits the trainee to access the same information available in the task environment and serves as a means for the trainee to assert actions to the system; a domain expert which is sufficiently intelligent to use the same information available to the trainee and carry out the task assigned to the trainee; a training session manager for examining the assertions made by the domain expert and by the trainee for evaluating such trainee assertions and providing guidance to the trainee which are appropriate to his acquired skill level; a trainee model which contains a history of the trainee interactions with the system together with summary evaluative data; an intelligent training scenario generator for designing increasingly complex training exercises based on the current skill level contained in the trainee model and on any weaknesses or deficiencies that the trainee has exhibited in previous interactions; and a blackboard that provides a common fact base for communication between the other components of the system. Preferably, the domain expert contains a list of 'mal-rules' which typifies errors that are usually made by novice trainees. Also preferably, the training session manager comprises an intelligent error detection means and an intelligent error handling means. The present invention utilizes a rule-based language having a control structure whereby a specific message passing protocol is utilized with respect to tasks which are procedural or step-by-step in structure. The rules can be activated by the trainee in any order to reach the solution by any valid or correct path.

  18. A computer aided treatment event recognition system in radiation therapy

    Energy Technology Data Exchange (ETDEWEB)

    Xia, Junyi, E-mail: junyi-xia@uiowa.edu; Mart, Christopher [Department of Radiation Oncology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, Iowa 52242 (United States); Bayouth, John [Department of Radiation Oncology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, Iowa 52242 and Department of Human Oncology, University of Wisconsin - Madison, 600 Highland Avenue, K4/B55, Madison, Wisconsin 53792-0600 (United States)

    2014-01-15

    Purpose: To develop an automated system to safeguard radiation therapy treatments by analyzing electronic treatment records and reporting treatment events. Methods: CATERS (Computer Aided Treatment Event Recognition System) was developed to detect treatment events by retrieving and analyzing electronic treatment records. CATERS is designed to make the treatment monitoring process more efficient by automating the search of the electronic record for possible deviations from physician's intention, such as logical inconsistencies as well as aberrant treatment parameters (e.g., beam energy, dose, table position, prescription change, treatment overrides, etc). Over a 5 month period (July 2012–November 2012), physicists were assisted by the CATERS software in conducting normal weekly chart checks with the aims of (a) determining the relative frequency of particular events in the authors’ clinic and (b) incorporating these checks into the CATERS. During this study period, 491 patients were treated at the University of Iowa Hospitals and Clinics for a total of 7692 fractions. Results: All treatment records from the 5 month analysis period were evaluated using all the checks incorporated into CATERS after the training period. About 553 events were detected as being exceptions, although none of them had significant dosimetric impact on patient treatments. These events included every known event type that was discovered during the trial period. A frequency analysis of the events showed that the top three types of detected events were couch position override (3.2%), extra cone beam imaging (1.85%), and significant couch position deviation (1.31%). The significant couch deviation is defined as the number of treatments where couch vertical exceeded two times standard deviation of all couch verticals, or couch lateral/longitudinal exceeded three times standard deviation of all couch laterals and longitudinals. On average, the application takes about 1 s per patient when

  19. A computer aided treatment event recognition system in radiation therapy

    International Nuclear Information System (INIS)

    Purpose: To develop an automated system to safeguard radiation therapy treatments by analyzing electronic treatment records and reporting treatment events. Methods: CATERS (Computer Aided Treatment Event Recognition System) was developed to detect treatment events by retrieving and analyzing electronic treatment records. CATERS is designed to make the treatment monitoring process more efficient by automating the search of the electronic record for possible deviations from physician's intention, such as logical inconsistencies as well as aberrant treatment parameters (e.g., beam energy, dose, table position, prescription change, treatment overrides, etc). Over a 5 month period (July 2012–November 2012), physicists were assisted by the CATERS software in conducting normal weekly chart checks with the aims of (a) determining the relative frequency of particular events in the authors’ clinic and (b) incorporating these checks into the CATERS. During this study period, 491 patients were treated at the University of Iowa Hospitals and Clinics for a total of 7692 fractions. Results: All treatment records from the 5 month analysis period were evaluated using all the checks incorporated into CATERS after the training period. About 553 events were detected as being exceptions, although none of them had significant dosimetric impact on patient treatments. These events included every known event type that was discovered during the trial period. A frequency analysis of the events showed that the top three types of detected events were couch position override (3.2%), extra cone beam imaging (1.85%), and significant couch position deviation (1.31%). The significant couch deviation is defined as the number of treatments where couch vertical exceeded two times standard deviation of all couch verticals, or couch lateral/longitudinal exceeded three times standard deviation of all couch laterals and longitudinals. On average, the application takes about 1 s per patient when

  20. Computer Aided Design of Polygalacturonase II from Aspergillus niger

    Directory of Open Access Journals (Sweden)

    Ibrahim Ali Noorbatcha

    2011-12-01

    Full Text Available Pectin is a complex polysaccharide found in the cell walls of plants and consisting mainly of esterified D-galacturonic acid resides in α-(1-4 chain. In production of fruit juice, pectin contributes to fruit juice viscosity, thereby reducing the juice production and increasing the filtration time. Polygalacturonase improves the juice production process by rapid degradation of pectin. In this project we have designed a novel polygalacturonase enzyme using computer aided design approaches. The three dimension structure of polygalacturonase is first modeled on the basis of the known crystal structure. The active site in this enzyme is identified by manual and automated docking methods. Lamarckian genetic algorithm is used for automated docking and the active site is validated by comparing with existing experimental data. This is followed by in silico mutations of the enzymes and the automated docking process is repeated using the mutant enzymes. The strength of the binding of the ligands inside the active site is evaluated by computing the binding score using Potential Mean Force (PMF method. The in silico mutations R256Q and K258N are found to decrease the binding strength of the ligand at the active site, indicating lowering of enzyme activity, which is consistent with the experimental results. Hence in silico mutations can be used to design new polygalacturonase enzymes with improved enzyme activity.ABSTRAK: Pektin adalah polisakarida kompleks yang terdapat di dalam dinding sel tumbuhan dan sebahagian besarnya terdiri daripada asid D-galakturonik terester yang ditemui di dalam rantaian α-(1-4. Dalam penghasilan jus buah-buahan, pektin menyumbang dalam kepekatan jus buah-buahan, di mana ia mengurangkan penghasilan jus dan menambahkan masa penapisan. Poligalakturonase meningkatkan proses penghasilan jus dengan pemecahan pektin dengan cepat. Dalam projek ini, kami telah merangka satu enzim poligalakturonase baru dengan menggunakan pendekatan reka

  1. Pilot decision making in a computer-aided flight management situation

    Science.gov (United States)

    Chu, Y. Y.; Rouse, W. B.

    1978-01-01

    An experimental representation of a computer-aided multi-task flight management situation has been developed. A computer aiding program was implemented to serve as a back-up decision maker. An experiment was conducted with a balanced design of several subject runs for different workload levels. This was achieved using three levels of subsystem event arrival rates, three levels of control task involvement, and three levels of availability of computer aiding. Experimental results compared quite favorably with those from a computer simulation which employed a queueing model. It was shown that the aiding had enhanced system performance as well as subjective ratings, and that the adaptive aiding policy further reduced subsystem delay.

  2. Analytical evaluation of computer-based decision aids

    International Nuclear Information System (INIS)

    This paper introduces a method for evaluating decision aids for nuclear power plant operators. The method involves a two-stage process of classification and analytical evaluation of display form and content. The classification scheme relates each specific aid to one or more general decision-making tasks. Evaluation then proceeds using a normative top-down design process based on the classification scheme by determining or deducing how various design issues associated with this process were resolved by the designer. The result is an assessment of the ''understandability'' of the aid as well as identification of the training and display features necessary to ensure understandability. 7 refs., 4 figs., 1 tab

  3. Computer-aided modeling for efficient and innovative product-process engineering

    DEFF Research Database (Denmark)

    Heitzig, Martina

    Model-based computer aided product-process engineering has attained increased importance in a number of industries, including pharmaceuticals, petrochemicals, fine chemicals, polymers, biotechnology, food, energy and water. This trend is set to continue due to the substantial benefits computer...... analysis, derivation of solution strategy and connection to appropriate solvers, model identification/ discrimination as well as model application for simulation and optimization. The computer-aided modelling framework has been implemented into an userfriendly software. A variety of case studies from...

  4. A COMPUTER AIDED DIAGNOSIS SYSTEM FOR DETECTION OF LUNG CANCER NODULES USING EXTREME LEARNING MACHINE

    OpenAIRE

    Gomathi, M.; Dr.P.Thangaraj

    2010-01-01

    The Computer Aided Diagnosing (CAD) system is proposed in this paper for detection of lung cancer form the analysis of computed tomography (CT) images of chest. To produce a successful Computer Aided Diagnosissystem, several problems has to be resolved. Segmentation is the first problem to be considered which helps in generation of candidate region for detecting cancer nodules. The second problem is identification of affected nodules from all the candidate nodules. Initially, the basic image ...

  5. Computer Aided Design in Digital Human Modeling for Human Computer Interaction in Ergonomic Assessment: A Review

    Directory of Open Access Journals (Sweden)

    Suman Mukhopadhyay , Sanjib Kumar Das and Tania Chakraborty

    2012-12-01

    Full Text Available Research in Human-Computer Interaction (HCI hasbeen enormously successful in the area of computeraidedergonomics or human-centric designs. Perfectfit for people has always been a target for productdesign. Designers traditionally used anthropometricdimensions for 3D product design which created a lotof fitting problems when dealing with thecomplexities of the human body shapes. Computeraided design (CAD, also known as Computer aideddesign and drafting (CADD is the computertechnology used for the design processing and designdocumentation. CAD has now been used extensivelyin many applications such as automotive,shipbuilding, aerospace industries, architectural andindustrial designs, prosthetics, computer animationfor special effects in movies, advertising andtechnical manuals. As a technology, digital humanmodeling (DHM has rapidly emerged as atechnology that creates, manipulates and controlhuman representations and human-machine systemsscenes on computers for interactive ergonomic designproblem solving. DHM promises to profoundlychange how products or systems are designed, howergonomics analysis is performed, how disorders andimpairments are assessed and how therapies andsurgeries are conducted. The imperative andemerging need for the DHM appears to be consistentwith the fact that the past decade has witnessedsignificant growth in both the software systemsoffering DHM capabilities as well as the corporateadapting the technology.The authors shall dwell atlength and deliberate on how research in DHM hasfinally brought about an enhanced HCI, in thecontext of computer-aided ergonomics or humancentricdesign and discuss about future trends in thiscontext.

  6. Development of the computer-aided process planning (CAPP system for polymer injection molds manufacturing

    Directory of Open Access Journals (Sweden)

    J. Tepić

    2011-10-01

    Full Text Available Beginning of production and selling of polymer products largely depends on mold manufacturing. The costs of mold manufacturing have significant share in the final price of a product. The best way to improve and rationalize polymer injection molds production process is by doing mold design automation and manufacturing process planning automation. This paper reviews development of a dedicated process planning system for manufacturing of the mold for injection molding, which integrates computer-aided design (CAD, computer-aided process planning (CAPP and computer-aided manufacturing (CAM technologies.

  7. Computer aided decision support system for cervical cancer classification

    Science.gov (United States)

    Rahmadwati, Rahmadwati; Naghdy, Golshah; Ros, Montserrat; Todd, Catherine

    2012-10-01

    Conventional analysis of a cervical histology image, such a pap smear or a biopsy sample, is performed by an expert pathologist manually. This involves inspecting the sample for cellular level abnormalities and determining the spread of the abnormalities. Cancer is graded based on the spread of the abnormal cells. This is a tedious, subjective and time-consuming process with considerable variations in diagnosis between the experts. This paper presents a computer aided decision support system (CADSS) tool to help the pathologists in their examination of the cervical cancer biopsies. The main aim of the proposed CADSS system is to identify abnormalities and quantify cancer grading in a systematic and repeatable manner. The paper proposes three different methods which presents and compares the results using 475 images of cervical biopsies which include normal, three stages of pre cancer, and malignant cases. This paper will explore various components of an effective CADSS; image acquisition, pre-processing, segmentation, feature extraction, classification, grading and disease identification. Cervical histological images are captured using a digital microscope. The images are captured in sufficient resolution to retain enough information for effective classification. Histology images of cervical biopsies consist of three major sections; background, stroma and squamous epithelium. Most diagnostic information are contained within the epithelium region. This paper will present two levels of segmentations; global (macro) and local (micro). At the global level the squamous epithelium is separated from the background and stroma. At the local or cellular level, the nuclei and cytoplasm are segmented for further analysis. Image features that influence the pathologists' decision during the analysis and classification of a cervical biopsy are the nuclei's shape and spread; the ratio of the areas of nuclei and cytoplasm as well as the texture and spread of the abnormalities

  8. Mandibular Reconstruction Using a Custom-Made Titanium Prosthesis: A Case Report on the Use of Virtual Surgical Planning and Computer-Aided Design/Computer-Aided Manufacturing.

    Science.gov (United States)

    Ow, Andrew; Tan, Winston; Pienkowski, Lukasz

    2016-09-01

    The use of virtual surgical planning and computer-aided design/computer-aided manufacturing has been reported to enhance the planning for the reconstruction of mandibular continuity defects. This case report illustrates the use of this technology in the fabrication of a custom-made titanium prosthesis to restore a segmental mandibular defect. The design specifications and sequence of the custom-made titanium prosthesis are discussed. Although successful in this case, there are limitations in its application and case selection is of vital importance. PMID:27516841

  9. Computer-aided classification of lung nodules on computed tomography images via deep learning technique.

    Science.gov (United States)

    Hua, Kai-Lung; Hsu, Che-Hao; Hidayati, Shintami Chusnul; Cheng, Wen-Huang; Chen, Yu-Jen

    2015-01-01

    Lung cancer has a poor prognosis when not diagnosed early and unresectable lesions are present. The management of small lung nodules noted on computed tomography scan is controversial due to uncertain tumor characteristics. A conventional computer-aided diagnosis (CAD) scheme requires several image processing and pattern recognition steps to accomplish a quantitative tumor differentiation result. In such an ad hoc image analysis pipeline, every step depends heavily on the performance of the previous step. Accordingly, tuning of classification performance in a conventional CAD scheme is very complicated and arduous. Deep learning techniques, on the other hand, have the intrinsic advantage of an automatic exploitation feature and tuning of performance in a seamless fashion. In this study, we attempted to simplify the image analysis pipeline of conventional CAD with deep learning techniques. Specifically, we introduced models of a deep belief network and a convolutional neural network in the context of nodule classification in computed tomography images. Two baseline methods with feature computing steps were implemented for comparison. The experimental results suggest that deep learning methods could achieve better discriminative results and hold promise in the CAD application domain. PMID:26346558

  10. A Unified Framework for Producing CAI Melting, Wark-Lovering Rims and Bowl-Shaped CAIs

    CERN Document Server

    Liffman, Kurt; Paterson, David A

    2016-01-01

    Calcium Aluminium Inclusions (CAIs) formed in the Solar System, some 4,567 million years ago. CAIs are almost always surrounded by Wark-Lovering Rims (WLRs), which are a sequence of thin, mono/bi-mineralic layers of refractory minerals, with a total thickness in the range of 1 to 100 microns. Recently, some CAIs have been found that have tektite-like bowl-shapes. To form such shapes, the CAI must have travelled through a rarefied gas at hypersonic speeds. We show how CAIs may have been ejected from the inner solar accretion disc via the centrifugal interaction between the solar magnetosphere and the inner disc rim. They subsequently punched through the hot, inner disc rim wall at hypersonic speeds. This re-entry heating partially or completely evaporated the CAIs. Such evaporation could have significantly increased the metal abundances of the inner disc rim. High speed movement through the inner disc produced WLRs. To match the observed thickness of WLRs required metal abundances at the inner disc wall that a...

  11. Virtual Reality versus Computer-Aided Exposure Treatments for Fear of Flying

    Science.gov (United States)

    Tortella-Feliu, Miquel; Botella, Cristina; Llabres, Jordi; Breton-Lopez, Juana Maria; del Amo, Antonio Riera; Banos, Rosa M.; Gelabert, Joan M.

    2011-01-01

    Evidence is growing that two modalities of computer-based exposure therapies--virtual reality and computer-aided psychotherapy--are effective in treating anxiety disorders, including fear of flying. However, they have not yet been directly compared. The aim of this study was to analyze the efficacy of three computer-based exposure treatments for…

  12. Computer-Aided psychotherapy for anxiety disorders: A meta-analytic review

    NARCIS (Netherlands)

    Cuijpers, P.; Marks, I.M.; Straten, van A.; Cavanagh, K; Gega, L.; Andersson, G.

    2009-01-01

    Computer-aided psychotherapy (CP) is said to (1) be as effective as face-to-face psychotherapy, while requiring less therapist time, for anxiety disorder sufferers, (2) speed access to care, and (3) save traveling time. CP may be delivered on stand-alone or Internet-linked computers, palmtop compute

  13. COMPUTER AIDED SOLVENT DESIGN FOR POLLUTION PREVENTION - PARIS II (SYSTEMS ANALYSIS BRANCH, SUSTAINABLE TECHNOLOGY DIVISION, NRMRL)

    Science.gov (United States)

    This method was designed to facilitate the replacement of environmentally objectionable industrial solvents by using computer aided methods to design benign replacement solvents or solvent mixtures. The method generates a short list of recommended replacement solvents or mixtures...

  14. Distributed Human Intelligence for Colonic Polyp Classification in Computer-aided Detection for CT Colonography

    OpenAIRE

    Nguyen, Tan B.; Wang, Shijun; Anugu, Vishal; Rose, Natalie; McKenna, Matthew; Petrick, Nicholas; Burns, Joseph E.; Summers, Ronald M.

    2012-01-01

    The performance of distributed human intelligence is not significantly different from that of computer-aided detection (CAD) for colonic polyp classification; the use of distributed human intelligence may provide insights that guide future CAD development.

  15. Computer aided taxonomy (CAT): Approach for understanding systematics of marine biota

    Digital Repository Service at National Institute of Oceanography (India)

    Chavan, V.S.; Kavlekar, D.P.; Chandramohan, D.

    Computer aided taconomy (CAT) is gaining importance day by day. In order to familiarise the taxonomy and its continuing usage an attempt has made to develop a module for knowing the systematics of organisms and to generate automatic numerical code...

  16. Application of computer-aided multi-scale modelling framework – Aerosol case study

    DEFF Research Database (Denmark)

    Heitzig, Martina; Sin, Gürkan; Glarborg, Peter; Gani, Rafiqul

    numerous steps, expert skills and different modelling tools. This motivates the development of a computer-aided modelling framework that supports the user during model development, documentation, analysis, identification, application and re-use with the goal to increase the efficiency of the modelling......Model-based computer aided product-process engineering has attained increased importance in a number of industries, including pharmaceuticals, petrochemicals, fine chemicals, polymers, biotechnology, food, energy and water. This trend is set to continue due to the substantial benefits computer......-aided methods provide. The key prerequisite of computer-aided product-process engineering is however the availability of models of different types, forms and application modes. The development of the models required for the systems under investigation tends to be a challenging and time-consuming task involving...

  17. Computer-aided modeling framework for efficient model development, analysis and identification

    DEFF Research Database (Denmark)

    Heitzig, Martina; Sin, Gürkan; Sales Cruz, Mauricio;

    2011-01-01

    Model-based computer aided product-process engineering has attained increased importance in a number of industries, including pharmaceuticals, petrochemicals, fine chemicals, polymers, biotechnology, food, energy, and water. This trend is set to continue due to the substantial benefits computer-aided...... methods introduce. The key prerequisite of computer-aided product-process engineering is however the availability of models of different types, forms, and application modes. The development of the models required for the systems under investigation tends to be a challenging and time-consuming task...... methodology has been implemented into a computer-aided modeling framework, which combines expert skills, tools, and database connections that are required for the different steps of the model development work-flow with the goal to increase the efficiency of the modeling process. The framework has two main...

  18. Computers in engineering 1983; Proceedings of the International Conference and Exhibit, Chicago, IL, August 7-11, 1983. Volume 1 - Computer-aided design, manufacturing, and simulation

    Science.gov (United States)

    Cokonis, T. J.

    The papers presented in this volume provide examples of the impact of computers on present engineering practice and indicate some future trends in computer-aided design, manufacturing, and simulation. Topics discussed include computer-aided design of turbine cycle configuration, managing and development of engineering computer systems, computer-aided manufacturing with robots in the automotive industry, and computer-aided design/analysis techniques of composite materials in the cure phase. Papers are also presented on computer simulation of vehicular propulsion systems, the performance of a hydraulic system simulator in a CAD environment, and computer simulation of hovercraft heave dynamics and control.

  19. Computer aided site management. Site use management by digital mapping

    International Nuclear Information System (INIS)

    The logistics program developed for assisting the Hague site management is presented. A digital site mapping representation and geographical data bases are used. The digital site map and its integration into a data base are described. The program can be applied to urban and rural land management aid. Technical administrative and economic evaluations of the program are summarized

  20. Approach to integrate product conceptual design information into a computer-aided design system

    OpenAIRE

    Torres Macias, Victor H.; Ríos Chueco, José; Vizán Idoipe, Antonio; Pérez García, Jesus Maria

    2013-01-01

    Commercial computer-aided design systems support the geometric definition of product, but they lack utilities to support initial design stages. Typical tasks such as customer need capture, functional requirement formalization, or design parameter definition are conducted in applications that, for instance, support ?quality function deployment? and ?failure modes and effects analysis? techniques. Such applications are noninteroperable with the computer-aided design systems, leading to disconti...

  1. Progress of the Computer-Aided Engineering of Electric Drive Vehicle Batteries (CAEBAT) (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Pesaran, A. A.; Han, T.; Hartridge, S.; Shaffer, C.; Kim, G. H.; Pannala, S.

    2013-06-01

    This presentation, Progress of Computer-Aided Engineering of Electric Drive Vehicle Batteries (CAEBAT) is about simulation and computer-aided engineering (CAE) tools that are widely used to speed up the research and development cycle and reduce the number of build-and-break steps, particularly in the automotive industry. Realizing this, DOE?s Vehicle Technologies Program initiated the CAEBAT project in April 2010 to develop a suite of software tools for designing batteries.

  2. Computer-Aided Diabetes Education: A Synthesis of Randomized Controlled Trials

    OpenAIRE

    Boren, Suzanne Austin; Gunlock, Teira L.; Krishna, Santosh; Kramer, Teresa C.

    2006-01-01

    Computer-aided diabetes education is the application of technology to provide information on diabetes self-management as well as test the users’ knowledge and provide feedback. The objective of this paper was to evaluate the impact of computer-aided diabetes education in improving health outcomes. We identified reports of randomized controlled trials through systematic electronic database searches. Three eligibility criteria were applied: randomized controlled trial; evaluation of a computeri...

  3. Computer aided detection of surgical retained foreign object for prevention

    Energy Technology Data Exchange (ETDEWEB)

    Hadjiiski, Lubomir, E-mail: lhadjisk@umich.edu; Marentis, Theodore C.; Rondon, Lucas; Chan, Heang-Ping [Department of Radiology, University of Michigan, Ann Arbor, Michigan 48109 (United States); Chaudhury, Amrita R.; Chronis, Nikolaos [Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

    2015-03-15

    Purpose: Surgical retained foreign objects (RFOs) have significant morbidity and mortality. They are associated with approximately $1.5 × 10{sup 9} annually in preventable medical costs. The detection accuracy of radiographs for RFOs is a mediocre 59%. The authors address the RFO problem with two complementary technologies: a three-dimensional (3D) gossypiboma micro tag, the μTag that improves the visibility of RFOs on radiographs, and a computer aided detection (CAD) system that detects the μTag. It is desirable for the CAD system to operate in a high specificity mode in the operating room (OR) and function as a first reader for the surgeon. This allows for fast point of care results and seamless workflow integration. The CAD system can also operate in a high sensitivity mode as a second reader for the radiologist to ensure the highest possible detection accuracy. Methods: The 3D geometry of the μTag produces a similar two dimensional (2D) depiction on radiographs regardless of its orientation in the human body and ensures accurate detection by a radiologist and the CAD. The authors created a data set of 1800 cadaver images with the 3D μTag and other common man-made surgical objects positioned randomly. A total of 1061 cadaver images contained a single μTag and the remaining 739 were without μTag. A radiologist marked the location of the μTag using an in-house developed graphical user interface. The data set was partitioned into three independent subsets: a training set, a validation set, and a test set, consisting of 540, 560, and 700 images, respectively. A CAD system with modules that included preprocessing μTag enhancement, labeling, segmentation, feature analysis, classification, and detection was developed. The CAD system was developed using the training and the validation sets. Results: On the training set, the CAD achieved 81.5% sensitivity with 0.014 false positives (FPs) per image in a high specificity mode for the surgeons in the OR and 96

  4. Computer aided detection of surgical retained foreign object for prevention

    International Nuclear Information System (INIS)

    Purpose: Surgical retained foreign objects (RFOs) have significant morbidity and mortality. They are associated with approximately $1.5 × 109 annually in preventable medical costs. The detection accuracy of radiographs for RFOs is a mediocre 59%. The authors address the RFO problem with two complementary technologies: a three-dimensional (3D) gossypiboma micro tag, the μTag that improves the visibility of RFOs on radiographs, and a computer aided detection (CAD) system that detects the μTag. It is desirable for the CAD system to operate in a high specificity mode in the operating room (OR) and function as a first reader for the surgeon. This allows for fast point of care results and seamless workflow integration. The CAD system can also operate in a high sensitivity mode as a second reader for the radiologist to ensure the highest possible detection accuracy. Methods: The 3D geometry of the μTag produces a similar two dimensional (2D) depiction on radiographs regardless of its orientation in the human body and ensures accurate detection by a radiologist and the CAD. The authors created a data set of 1800 cadaver images with the 3D μTag and other common man-made surgical objects positioned randomly. A total of 1061 cadaver images contained a single μTag and the remaining 739 were without μTag. A radiologist marked the location of the μTag using an in-house developed graphical user interface. The data set was partitioned into three independent subsets: a training set, a validation set, and a test set, consisting of 540, 560, and 700 images, respectively. A CAD system with modules that included preprocessing μTag enhancement, labeling, segmentation, feature analysis, classification, and detection was developed. The CAD system was developed using the training and the validation sets. Results: On the training set, the CAD achieved 81.5% sensitivity with 0.014 false positives (FPs) per image in a high specificity mode for the surgeons in the OR and 96

  5. A Study on Application of CAI Dynamic Image-Guided Method in College Physical Education Technical Course

    OpenAIRE

    Baokui Wang

    2013-01-01

    In this study, we have a study on application of CAI dynamic image-guided method in college physical education technical course. In college physical education teaching, the Computer-Assisted Instruction (CAI) dynamic image-guided method is employed to build the sport image diagnosis and implement 2-way feedback mechanism. This is for helping the students to create or modify the sport image, and strengthen the concept of action to set up the correct technical dynamic stereotype. The practice o...

  6. Computer-aided classification of lung nodules on computed tomography images via deep learning technique

    Directory of Open Access Journals (Sweden)

    Hua KL

    2015-08-01

    Full Text Available Kai-Lung Hua,1 Che-Hao Hsu,1 Shintami Chusnul Hidayati,1 Wen-Huang Cheng,2 Yu-Jen Chen3 1Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, 2Research Center for Information Technology Innovation, Academia Sinica, 3Department of Radiation Oncology, MacKay Memorial Hospital, Taipei, Taiwan Abstract: Lung cancer has a poor prognosis when not diagnosed early and unresectable lesions are present. The management of small lung nodules noted on computed tomography scan is controversial due to uncertain tumor characteristics. A conventional computer-aided diagnosis (CAD scheme requires several image processing and pattern recognition steps to accomplish a quantitative tumor differentiation result. In such an ad hoc image analysis pipeline, every step depends heavily on the performance of the previous step. Accordingly, tuning of classification performance in a conventional CAD scheme is very complicated and arduous. Deep learning techniques, on the other hand, have the intrinsic advantage of an automatic exploitation feature and tuning of performance in a seamless fashion. In this study, we attempted to simplify the image analysis pipeline of conventional CAD with deep learning techniques. Specifically, we introduced models of a deep belief network and a convolutional neural network in the context of nodule classification in computed tomography images. Two baseline methods with feature computing steps were implemented for comparison. The experimental results suggest that deep learning methods could achieve better discriminative results and hold promise in the CAD application domain. Keywords: nodule classification, deep learning, deep belief network, convolutional neural network

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

    OpenAIRE

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

    1998-01-01

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

  8. Review of AIDS development. [airborne computers for reliability engineering

    Science.gov (United States)

    Vermeulen, H. C.; Danielsson, S. G.

    1981-01-01

    The operation and implementation of the aircraft integrated data system AIDS are described. The system is described as an engineering tool with strong emphasis on analysis of recorded information. The AIDS is primarily directed to the monitoring of parameters related to: the safety of the flight; the performance of the aircraft; the performance of the flight guidance system; and the performance and condition of the engines. The system provide short term trend analysis on a trend chart that is updated by the flight engineer on every flight that lasts more than 4 flight hours. Engine data prints are automatically presented during take-off and in the case of limit excedance, e.g., the print shows an automatically reported impending hotstarts on engine nr. 1. Other significant features are reported.

  9. PENGARUH KOMPETISI PASAR DAN COMPUTER-AIDED MANUFACTURING TERHADAP PENGGUNAAN MULTIPLE PERFORMANCE MEASURES

    Directory of Open Access Journals (Sweden)

    Megawati Hutagalung

    2006-01-01

    Full Text Available Recent development in performance measurement area suggests that companies should employ multiple performance measures (such as the Balanced Scorecrad to increase their performance. Little studies, however, have examined factors affecting the usage of multiple performance measures by companies. This study therefore, investigates if market competition and computer aided manufacturing process affecting multiple performance measures usage. Using functional managers of manufacturing companies listed in the Jakarta Stock Exchange as samples, this study finds that market competition and computer aided manufacturing process affecting multiple performance measures usage. Abstract in Bahasa Indonesia : Perkembangan terakhir tentang sistem pengukuran kinerja perusahaan menyarankan perusahaan untuk menggunakan ukuran penilaian yang beragam (seperti balance scorecard untuk meningkatkan kinerja perusahaan. Penelitian sederhana telah menyebutkan factor-faktor yang mempengaruhi penggunaan multiple performance measure oleh perusahaan. Penelitian ini selanjutnya menyelidiki apakah penggunaan multiple performance measure mempengaruhi peningkatan persaingan pasar dan penggunaan computer aided manufacturing (CAM mempengaruhi. Dengan menggunakan. Kata kunci: komputer aided manufacturing, kompetisi pasar, multiple performance measures.

  10. A Pseudo-Language for Creating CAI Programs on APL Systems

    Science.gov (United States)

    Gucker, Edward J.

    1973-01-01

    Encourages the use of APL as a language for computer assisted instruction (CAI) instead of such languages as BASIC or COURSEWRITER. Describes a set of APL functions that can simulate to some extent the features of COURSEWRITER, while permitting a more experienced course author to use the full mathematical power of APL. (Author/JF)

  11. Using CAI To Enhance the Peer Acceptance of Mainstreamed Students with Mild Disabilities.

    Science.gov (United States)

    Culliver, Concetta; Obi, Sunday

    This study applied computer-assisted instruction (CAI) techniques to improve peer acceptance among 92 mainstreamed students with mild disabilities from 10 to 13 years of age. Participants in the treatment group received their generalized curriculum program (including mathematics, language arts, reading, health, social studies, and science)…

  12. Computer-aided design of dry powder inhalers using computational fluid dynamics to assess performance.

    Science.gov (United States)

    Suwandecha, Tan; Wongpoowarak, Wibul; Srichana, Teerapol

    2016-01-01

    Dry powder inhalers (DPIs) are gaining popularity for the delivery of drugs. A cost effective and efficient delivery device is necessary. Developing new DPIs by modifying an existing device may be the simplest way to improve the performance of the devices. The aim of this research was to produce a new DPIs using computational fluid dynamics (CFD). The new DPIs took advantages of the Cyclohaler® and the Rotahaler®. We chose a combination of the capsule chamber of the Cyclohaler® and the mouthpiece and grid of the Rotahaler®. Computer-aided design models of the devices were created and evaluated using CFD. Prototype models were created and tested with the DPI dispersion experiments. The proposed model 3 device had a high turbulence with a good degree of deagglomeration in the CFD and the experiment data. The %fine particle fraction (FPF) was around 50% at 60 L/min. The mass median aerodynamic diameter was around 2.8-4 μm. The FPF were strongly correlated to the CFD-predicted turbulence and the mechanical impaction parameters. The drug retention in the capsule was only 5-7%. In summary, a simple modification of the Cyclohaler® and Rotahaler® could produce a better performing inhaler using the CFD-assisted design. PMID:25265389

  13. Computer-aided design of bromelain and papain covalent immobilization

    Directory of Open Access Journals (Sweden)

    Bessy Cutiño-Avila

    2014-06-01

    Full Text Available Título en español: Diseño asistido por computadora de la inmovilización covalente de bromelina y papaína.Título corto: Computer-aided design of bromelain and papain. Abstract: Enzymes as immobilized derivatives have been widely used in Food, Agrochemical, Pharmaceutical and Biotechnological industries. Protein immobilization is probably the most used technology to improve the operational stability of these molecules. Bromelain (Ananas comosus and papain (Carica papaya are cystein proteases extensively used as immobilized biocatalyst with several applications in therapeutics, racemic mixtures resolution, affinity chromatography and others industrial scenarios. The aim of this work was to optimize the covalent immobilization of bromelain and papain via rational design of immobilized derivatives strategy (RDID and RDID1.0 program. It was determined the maximum protein quantity to immobilize, the optimum immobilization pH (in terms of functional activity retention, and the most probable configuration of the immobilized derivative and the probabilities of multipoint covalent attachment was also predicted. As support material Glyoxyl-Sepharose CL 4B was used.  The accuracy of RDID1.0 program´s prediction was demonstrated comparing with experimental results. Bromelain and papain immobilized derivatives showed desired characteristics for industrial biocatalysis, such as: elevate pH stability retaining 95% and 100% residual activity at pH 7.0 and 8.0, for bromelain and papain, respectively; high thermal stability at 30 °C retaining 90% residual activity for both immobilized enzymes; a catalytic configuration bonded by immobilization at optimal pH; and the ligand load achieved, ensures the minimization of diffusional restrictions.Key words: bromelain, covalent immobilization, immobilized derivatives, papain, rational design.Resumen: Las enzimas inmovilizadas han sido ampliamente utilizadas en las industrias Alimentaria, Agroquímica, Farmac

  14. Computer Aided Detection of Ischemic Stroke Using Verilog HDL

    OpenAIRE

    P. Arivalagan*1; K. Adalarasu2

    2014-01-01

    Computed tomography (CT) images are widely used in the diagnosis of ischemic stroke because of its faster acquisition and compatibility with most life support devices. In present work we proposal advance techniques to automated detection of ischemic stroke using verilog code and image feature characteristics, which separate the ischemic stroke region from healthy tissues in computed tomography images.

  15. Computer-aided simulation study of photomultiplier tubes

    Science.gov (United States)

    Zaghloul, Mona E.; Rhee, Do Jun

    1989-01-01

    A computer model that simulates the response of photomultiplier tubes (PMTs) and the associated voltage divider circuit is developed. An equivalent circuit that approximates the operation of the device is derived and then used to develop a computer simulation of the PMT. Simulation results are presented and discussed.

  16. Developing CAI project with multimedia control in Visual Basic about image%用Visual Basic软件开发多媒体CAI课件——图像篇

    Institute of Scientific and Technical Information of China (English)

    曲双为

    2001-01-01

    Some skills that how to treat picture for multimedia Computer Aided Introduction (CAI) are introduced in this paper. This skills are based on Microsoft Visual Basic 6.0 which is a popular programming tool used by many programmers at present.%从编程的角度出发,介绍了以Microsoft Visual Basic 6.0为开发平台,在开发多媒体CAI课件的过程中对图像的部分处理技巧.

  17. Computer-Aided Protein Directed Evolution: a Review of Web Servers, Databases and other Computational Tools for Protein Engineering

    OpenAIRE

    Rajni Verma; Ulrich Schwaneberg; Danilo Roccatano

    2012-01-01

    The combination of computational and directed evolution methods has proven a winning strategy for protein engineering. We refer to this approach as computer-aided protein directed evolution (CAPDE) and the review summarizes the recent developments in this rapidly growing field. We will restrict ourselves to overview the availability, usability and limitations of web servers, databases and other computational tools proposed in the last five years. The goal of this review is to provide concise ...

  18. Web-Based Learning in the Computer-Aided Design Curriculum.

    Science.gov (United States)

    Sung, Wen-Tsai; Ou, S. C.

    2002-01-01

    Applies principles of constructivism and virtual reality (VR) to computer-aided design (CAD) curriculum, particularly engineering, by integrating network, VR and CAD technologies into a Web-based learning environment that expands traditional two-dimensional computer graphics into a three-dimensional real-time simulation that enhances user…

  19. The Journal of Computer-Aided Molecular Design: a bibliometric note

    OpenAIRE

    Willett, P.

    2012-01-01

    Summarizes the articles in, and the citations to, volumes 2-24 of the Journal of Computer-Aided Molecular Design. The citations to the journal come from almost 2000 different sources that span a very wide range of academic subjects, with the most heavily cited articles being descriptions of software systems and of computational methods.

  20. Computer-Aided Detection of Polyps in CT Colonography Using Logistic Regression

    NARCIS (Netherlands)

    Van Ravesteijn, V.F.; Van Wijk, C.; Vos, F.M.; Truyen, R.; Peters, J.F.; Stoker, J.; Van Vliet, L.J.

    2010-01-01

    We present a computer-aided detection (CAD) system for computed tomography colonography that orders the polyps according to clinical relevance. TheCADsystem consists of two steps: candidate detection and supervised classification. The characteristics of the detection step lead to specific choices fo

  1. A Computer-Aided Self-Testing System for Biological Psychology.

    Science.gov (United States)

    Leiblum, M. D.; And Others

    1994-01-01

    Describes the production of a computer-aided, self-testing system for university students enrolled in a first-year course in biological psychology. Project aspects described include selection, acquisition and description of software; question banks and test structures; modes of use (computer or printed version); evaluation; and future plans. (11…

  2. Integrated Computer Aided Planning and Manufacture of Advanced Technology Jet Engines

    Directory of Open Access Journals (Sweden)

    B. K. Subhas

    1987-10-01

    Full Text Available This paper highlights an attempt at evolving a computer aided manufacturing system on a personal computer. A case study of an advanced technology jet engine component is included to illustrate various outputs from the system. The proposed system could be an alternate solution to sophisticated and expensive CAD/CAM workstations.

  3. Computer-aided testing and operational aids for PARR-1 nuclear reactor

    Energy Technology Data Exchange (ETDEWEB)

    Ansari, S.A. (Nuclear Engineering Div., Pakistan Institute of Nuclear Science and Technology, P.O. Nilore, Islamabad (PK))

    1990-06-01

    The utilization of the plant computer of Pakistan Research Reactor (PARR-1) for automatic periodic testing of nuclear instrumentation in the reactor is described. Computer algorithms have been developed for on-line acquisition and real-time processing of nuclear channel signals. The mean value, standard deviation, and probability distributions of nuclear channel signals are obtained in real time, and the computer generates a warning message if the signal error exceeds the maximum permissible error. In this way a faulty channel is automatically identified. Other real-time algorithms are also described that assist the operator in safe reactor operation by automatically computing approach-to-criticality during reactor start-up and the control rod worth determination.

  4. Computer-aided testing and operational aids for PARR-1 nuclear reactor

    International Nuclear Information System (INIS)

    The utilization of the plant computer of Pakistan Research Reactor (PARR-1) for automatic periodic testing of nuclear instrumentation in the reactor is described. Computer algorithms have been developed for on-line acquisition and real-time processing of nuclear channel signals. The mean value, standard deviation, and probability distributions of nuclear channel signals are obtained in real time, and the computer generates a warning message if the signal error exceeds the maximum permissible error. In this way a faulty channel is automatically identified. Other real-time algorithms are also described that assist the operator in safe reactor operation by automatically computing approach-to-criticality during reactor start-up and the control rod worth determination

  5. COMPUTER-AIDED IDENTIFICATION OF ENVIRONMENTAL IMPACTS OF BUSINESSES

    OpenAIRE

    Halina Marczak

    2015-01-01

    Discussed elements of the computer databases used in “input-output” analysis method to identify enterprise impact on the environment. Presented “input-output” database parameters essential for a company performing road transport of finished products. Presented a method for determining parameters: energy consumption by means of road transport and the emissions amount with exhaust fumes from vehicles. Discussed parameters of the computer databases needed to calculate the amount of fees for use ...

  6. Computer-Aided Design Of Turbine Blades And Vanes

    Science.gov (United States)

    Hsu, Wayne Q.

    1988-01-01

    Quasi-three-dimensional method for determining aerothermodynamic configuration of turbine uses computer-interactive analysis and design and computer-interactive graphics. Design procedure executed rapidly so designer easily repeats it to arrive at best performance, size, structural integrity, and engine life. Sequence of events in aerothermodynamic analysis and design starts with engine-balance equations and ends with boundary-layer analysis and viscous-flow calculations. Analysis-and-design procedure interactive and iterative throughout.

  7. Computer vision as a navigation aid for visually impaired

    OpenAIRE

    MARKOČIČ, JAN

    2015-01-01

    Accomplishing many of the every-day activities present a significant challenge to visually impaired people. One of such challenges is navigation in an unsupervised environment, which might be well addressed with technological solutions. The recent technological advances have made computational devices with significant processing power a widely affordable commodity. In parallel, the advances in computer-vision-based systems allow scene reconstruction in real time paving the way for realistic s...

  8. Systematic Methods and Tools for Computer Aided Modelling

    DEFF Research Database (Denmark)

    Fedorova, Marina

    Models are playing important roles in design and analysis of chemicals/bio-chemicals based products and the processes that manufacture them. Model-based methods and tools have the potential to decrease the number of experiments, which can be expensive and time consuming, and point to candidates...... aided methods and tools, that include procedures to perform model translation, model analysis, model verification/validation, model solution and model documentation; 4) model transfer – export/import to/from other application for further extension and application – several types of formats, such as XML...... has been developed by establishing a connection with an external modelling environment for code generation. The main contribution of this thesis is a creation of modelling templates and their connection with other modelling tools within a modelling framework. The goal was to create a user...

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

    OpenAIRE

    Musiimenta, Angella

    2011-01-01

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

  10. Computer-aided design of a catalyst for Edman degradation utilizing substrate-assisted catalysis

    OpenAIRE

    Borgo, Benjamin; Havranek, James J.

    2014-01-01

    Molecular biology has been revolutionized by the miniaturization and parallelization of DNA sequencing assays previously performed on bulk samples. Many of these technologies rely on biomolecular reagents to facilitate detection, synthesis, or labeling of samples. To aid in the construction of analogous experimental approaches for proteins and peptides, we have used computer-aided design to engineer an enzyme capable of catalyzing the cleavage step of the Edman degradation. We exploit the sim...

  11. Abdominal Computed tomography of 25 patients with AIDS or lymphadenopathy Syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Arrive, L.; Frija, J.; Couderc, L.J.; Clauvel, J.P.; Laval-Jeantet, M.

    1986-03-01

    An abdominal computed tomographic examination was performed to 20 patients with Acquired Immunodeficiency Syndrome (AIDS) and to 5 patients with Lymphadenopathy Syndrome (LAS). Intraabdominal lymph nodes were seen in 18 out of 20 cases of AIDS and in 5 cases of LAS. Lymph nodes have a normal size or are slightly enlarged but they are too numerous. Splenomegaly was found in 17 patients. Rectal modifications secondary to a proctitis were seen in the homosexual patients.

  12. Abdominal Computed tomography of 25 patients with AIDS or lymphadenopathy Syndrome

    International Nuclear Information System (INIS)

    An abdominal computed tomographic examination was performed to 20 patients with Acquired Immunodeficiency Syndrome (AIDS) and to 5 patients with Lymphadenopathy Syndrome (LAS). Intraabdominal lymph nodes were seen in 18 out of 20 cases of AIDS and in 5 cases of LAS. Lymph nodes have a normal size or are slightly enlarged but they are too numerous. Splenomegaly was found in 17 patients. Rectal modifications secondary to a proctitis were seen in the homosexual patients

  13. On the Feasibility of Steering Swallowable Microsystem Capsules Using Computer-Aided Magnetic Levitation

    OpenAIRE

    Wu, Billy; Mintchev, Martin

    2008-01-01

    Swallowable capsule endoscopy is used for non-invasive diagnosis of some gastrointestinal (GI) organs. However, control over the position of the capsule is a major unresolved issue. This study presents a design for steering the capsule based on magnetic levitation. The levitation is stabilized with the aid of a computer-aided feedback control system and diamagnetism. Peristaltic and gravitational forces to be overcome were calculated. A levitation setup was built to analyze the fe...

  14. Computer aided composition by means of interactive GP

    DEFF Research Database (Denmark)

    Ando, Daichi; Dahlstedt, Palle; Nordahl, Mats G.;

    2006-01-01

    Research on the application of Interactive Evolutionary Computation (IEC) to the field of musical computation has been improved in recent years, marking an interesting parallel to the current trend of applying human characteristics or sensitivities to computer systems. However, past techniques...... developed for IEC-based composition have not necessarily proven very effective for professional use. This is due to the large difference between data representation used by IEC and authored classical music composition. To solve this difficulties, we purpose a new IEC approach to music composition based on...... classical music theory. In this paper, we describe an established system according to the above idea, and detail of making success of composition a piece....

  15. Computer-aided design and optimization of centrifugal pumps

    Energy Technology Data Exchange (ETDEWEB)

    Asuaje, M.; Bakir, F.; Kouidri, S.; Noguera, R.; Rey, R.

    2005-03-15

    Improvement in computer power and the development of numerical computational methods over the last few years have allowed the emergence of computational fluid dynamic (CFD) codes, making possible the numerical simulation of flow and energy transfer in turbo machines. To improve the efficiency of these tools, fast design software must be used. Within the framework of the optimization process of centrifugal pumps, HELIOX software was developed. It is a tool for design and performance analysis of centrifugal pumps. HELIOX allows quick design of new pumps and improvement of existing ones. HELIOX's performance analysis has been validated through many industrial cases: approximately 100 machines of different sizes and mechanical power. Heliox can be linked to quasi-and three-dimensional analysis tools; these tools enable a better understanding of physical phenomena so as to control the flow fields inside pumps. (Author)

  16. QCE: An intelligent aid towards self-explanatory computer simulation

    International Nuclear Information System (INIS)

    The paper aims to propose an attempt towards such self-explanatory computer simulation. Qualitative Constraint-based Explanation (QCE) is a technique of generating explanations on the results of numerical computer simulation by qualitative reasoning based on the system equations used in the simulation, which include natural laws, mathematical formulae and other domain-specific knowledge. The QCE system does this work by propagating qualitative constraints among the equations. In the paper, the concept of self-explanatory simulation is discussed, and then the detail of the methodology used in QCE as well as some examples of its application will be presented to show the prospect of self-explanatory computer simulation. (orig./DG)

  17. Human performance models for computer-aided engineering

    Science.gov (United States)

    Elkind, Jerome I. (Editor); Card, Stuart K. (Editor); Hochberg, Julian (Editor); Huey, Beverly Messick (Editor)

    1989-01-01

    This report discusses a topic important to the field of computational human factors: models of human performance and their use in computer-based engineering facilities for the design of complex systems. It focuses on a particular human factors design problem -- the design of cockpit systems for advanced helicopters -- and on a particular aspect of human performance -- vision and related cognitive functions. By focusing in this way, the authors were able to address the selected topics in some depth and develop findings and recommendations that they believe have application to many other aspects of human performance and to other design domains.

  18. Two-dimensional layout computer-aided system

    Science.gov (United States)

    Dai, Tong; Cao, Juliang; Zhang, Xiong

    1996-03-01

    This paper presents a computer software system for an often encountered 2D layout problem in the shipbuilding and manufacture industries. For an ordered set of irregular as well as rectangular pieces, the system produces rectangles called modules for the pieces at first, and then places these modules into given rectangular sheets of fixed dimensions such that the number of sheets used is minimized. The system also provides the user with an interaction procedure in order to make itself as flexible as possible. This system has been implemented on IBM PC/AT 486 and compatible computers and is supported by AutoCAD system.

  19. Server-Aided Two-Party Computation with Simultaneous Corruption

    DEFF Research Database (Denmark)

    Cascudo Pueyo, Ignacio; Damgård, Ivan Bjerre; Ranellucci, Samuel

    We consider secure two-party computation in the client-server model where there are two adversaries that operate separately but simultaneously, each of them corrupting one of the parties and a restricted subset of servers that they interact with. We model security via the local universal composab......We consider secure two-party computation in the client-server model where there are two adversaries that operate separately but simultaneously, each of them corrupting one of the parties and a restricted subset of servers that they interact with. We model security via the local universal...

  20. Recent Progress in Computer-Aided Diagnosis of Lung Nodules on Thin-Section CT

    OpenAIRE

    Li, Qiang

    2007-01-01

    Computer-aided diagnosis (CAD) provides a computer output as a “second opinion” in order to assist radiologists in the diagnosis of various diseases on medical images. Currently, a significant research effort is being devoted to the detection and characterization of lung nodules in thin-section computed tomography (CT) images, which represents one of the newest direction of CAD development in thoracic imaging. We describe in this article the current status of the development and evaluation of...

  1. Computer-aided design of stripline ferrite junction circulators

    Science.gov (United States)

    Uzdy, Z.

    1980-01-01

    A general design procedure is presented for stripline Y-junction circulators employing solid dielectric between ground planes. The resonator design and impedance matching are derived in a form suitable for computer evaluation. The procedure is applicable to cases where either the circulator bandwidth or the ground plane spacing is specified. An experimental S-band switching circulator design illustrates the technique.

  2. Computer-aided design and analysis of mechanisms

    Science.gov (United States)

    Knight, F. L.

    1982-01-01

    An introduction to the computer programs developed to assist in the design and analysis of mechanisms is presented. A survey of the various types of programs which are available is given, and the most widely used programs are compared. The way in which the programs are used is discussed, and demonstrated with an example.

  3. Computer-aided visualization of database structural relationships

    International Nuclear Information System (INIS)

    Interactive computer graphic displays can be extremely useful in augmenting understandability of data structures. In complexly interrelated domains such as bibliographic thesauri and energy information systems, node and link displays represent one such tool. This paper presents examples of data structure representations found useful in these domains and discusses some of their generalizable components. 2 figures

  4. Computer aided fire resistance for steel and composite structures

    OpenAIRE

    Dotreppe, Jean-Claude; Franssen, Jean-Marc; Schleich, Jean-Baptiste

    1984-01-01

    This paper introduces the main features of the computer software CEFICOSS. 2D fnite differences are used for the transient non linear thermal analysis. 2D Bernoulli beam finite elements are used for the transient large displacement mechanical analysis Peer reviewed

  5. A computer-aided surface roughness measurement system

    International Nuclear Information System (INIS)

    A diamond stylus profilometer with computer-based data acquisitions/analysis system is being used to characterize surfaces of reactor components and materials, and to examine the effects of surface topography on thermal contact conductance. The current system is described; measurement problems and system development are discussed in general terms and possible future improvements are outlined

  6. Interactive Computer Aided Learning and Teaching of Analytical Mechanics

    OpenAIRE

    Aare Aan; Mati Heinloo; Eino Aarend

    2011-01-01

    The aim of this paper is to introduce a new possibility for learning Analytical Mechanics via internet. This subject belongs to the field of engineering, the theoretical parts of lecture materials are available online in PDF format and have special links to switch on the interactive examples on the worksheets of the Computer Package Mathcad.

  7. Reactive Visual Programs for Computer-Aided Music Composition

    OpenAIRE

    Jean BRESSON

    2014-01-01

    We present the new reactive programming framework in OpenMusic, highlighting some characteristics of the programming and computation paradigms involved. We describe the implementation of the hybrid demand-driven/event-driven evaluation model and show some preliminary extensions and applications.

  8. Why igneous wollastonite is so rare in CAIs

    OpenAIRE

    Beckett, J. R.; Thrane, K.; Krot, A. N.

    2008-01-01

    Primary wollastonite (wo) thought to have crystallized from a liquid is quite rare in CAIs, having been reported in only two igneous inclusions, White Angel and KT-1 [1, 2]. Both of these CAIs exhibit significant mass fractionations in multiple elements and KT-1 is a FUN inclusion, so it is highly desirable to place as many constraints as possible on their formation. Since phase diagrams previously developed for CAIs do not involve wo [3], we use literature data on wo-satura...

  9. Computer-aided Framework for Design of Pure, Mixed and Blended Products

    DEFF Research Database (Denmark)

    Cignitti, Stefano; Zhang, Lei; Gani, Rafiqul

    2015-01-01

    Design of novel chemical products with process and application considerations is an emerging topic in thefield of chemical and biochemical engineering. Methods, such as Computer Aided Molecular Design(CAMD) [1] and Computer-aided Mixture and Blend Design (CAMbD) [2], provide the possibility of...... metrics that must be included in today’s product designs, consequently makes the problem harder to mathematically formulate and to solve.In this work, a framework for computer-aided design of pure, mixed and blended chemical products hasbeen developed. The framework is a systematic approach to formulate...... and solve CAMbD problems throughfour sequential steps. In the first step, the needs, target properties and product type are defined. In the second step, the CAMbD is formulated together with objectives and process/application model. In the third step,the formulation is then converted into a mixed...

  10. Computer-aided detection of tubes and lines in portable chest X-ray images

    International Nuclear Information System (INIS)

    A computer-aided detection method for highlighting lines and tubes in a portable chest X-ray image is developed. The method determines a region of interest in the image, and processes the image to provide edge enhancement forming an edge-enhanced image. Edge segments in the edge-enhanced image are detected. Connected lines from the edge segments are formed to obtain a set of connected lines. A tube structure is identified by pairing, from the set of connected lines, one or more pairs of edges separated by a width dimension in a predetermined range. A tip is detected according to the convergence or divergence of paired connected lines. Tube and tip are outlined on the radiographic image. Preliminary results showed that computer-aided detection of tubes in portable chest X-ray images is promising. It is expected that computer-aided interpretation of portable chest X-ray images improve the overall workflow and efficiency. (orig.)

  11. The Research of Computer Aided Farm Machinery Designing Method Based on Ergonomics

    Science.gov (United States)

    Gao, Xiyin; Li, Xinling; Song, Qiang; Zheng, Ying

    Along with agricultural economy development, the farm machinery product type Increases gradually, the ergonomics question is also getting more and more prominent. The widespread application of computer aided machinery design makes it possible that farm machinery design is intuitive, flexible and convenient. At present, because the developed computer aided ergonomics software has not suitable human body database, which is needed in view of farm machinery design in China, the farm machinery design have deviation in ergonomics analysis. This article puts forward that using the open database interface procedure in CATIA to establish human body database which aims at the farm machinery design, and reading the human body data to ergonomics module of CATIA can product practical application virtual body, using human posture analysis and human activity analysis module to analysis the ergonomics in farm machinery, thus computer aided farm machinery designing method based on engineering can be realized.

  12. A Multi-step and Multi-level approach for Computer Aided Molecular Design

    DEFF Research Database (Denmark)

    A general multi-step approach for setting up, solving and solution analysis of computer aided molecular design (CAMD) problems is presented. The approach differs from previous work within the field of CAMD since it also addresses the need for a computer aided problem formulation and result analysis....... The problem formulation step incorporates a knowledge base for the identification and setup of the design criteria. Candidate compounds are identified using a multi-level generate and test CAMD solution algorithm capable of designing molecules having a high level of molecular detail. A post solution...... step using an Integrated Computer Aided System (ICAS) for result analysis and verification is included in the methodology. Keywords: CAMD, separation processes, knowledge base, molecular design, solvent selection, substitution, group contribution, property prediction, ICAS Introduction The use of...

  13. Alignment and articular orientation of lower limbs: manual vs computer-aided measurements on digital radiograms

    International Nuclear Information System (INIS)

    Purpose: To compare the manual measurements of lower limbs on digital images with those obtained with dedicated software. Materials and methods: Forty patients with a clinical suspicion of lower limb deformity were enrolled. Eighty digital radiographs were produced with a remote-controlled radiography system (Philips Omnidia-gnost). The measurements were taken separately by an Orthopaedic Surgeon and by a Radiologist, by hand and with the aid of software, respectively. Five parameters were assessed: femoral length, tibial length, distal-medial femoral angle, proximal-medial tibial angle and tibial-femoral angle. The statistical analysis of the comparison was based on Student's-test. The inter-observer variability of the methods, manual and computer-aided, was evaluated with Fisher's F-test on a sample of measurements (20 lower limbs), taken by 5 different Orthopaedic Surgeons and Radiologists, respectively. Results: There were no statistically significant differences between the measurements taken with the manual and computer-aided methods (p>0.05). The overall reproducibility of both methods was similar; conversely, the separate evaluation of angles and lengths showed that the computer-aided method was less variable in the measurements of lengths than the manual method. Conclusions: The computer-aided evaluation of the alignment and articular orientation parameters of lower limbs is as accurate and reliable as the traditional manual method, but is faster and allows better-quality images

  14. Computer-Aided Protein Directed Evolution: a Review of Web Servers, Databases and other Computational Tools for Protein Engineering

    Directory of Open Access Journals (Sweden)

    Rajni Verma

    2012-09-01

    Full Text Available The combination of computational and directed evolution methods has proven a winning strategy for protein engineering. We refer to this approach as computer-aided protein directed evolution (CAPDE and the review summarizes the recent developments in this rapidly growing field. We will restrict ourselves to overview the availability, usability and limitations of web servers, databases and other computational tools proposed in the last five years. The goal of this review is to provide concise information about currently available computational resources to assist the design of directed evolution based protein engineering experiment.

  15. Art,Science and Technology——Computed Aided Design in Practice & How computer technology affect designer’s work

    Institute of Scientific and Technical Information of China (English)

    赵耀

    2010-01-01

    Introduction:Computing technology has developed significantly in the past few decades.It affects almost everyone in the modern society,creating new ways of communication which affects both our work and leisure activities.Particularly,in today’s world of design and technology,computer aided design is fast becoming a technologically and economically feasible reality.Most designers have accepted the fact that computer aided design plays an important role in the success of their practices,not due to it’s value as an efficient drafting and modeling tool,but also because of clients’perception that it makes sound financial sense to utilize CAD.On the other hand,many people argue that computers are not fully autonomous,they are merely unconscious digital slaves or tools of production.In addition,the abusive use of software technology would turn creative art design into a purely industrial activity.

  16. Bioassay Phantoms Using Medical Images and Computer Aided Manufacturing

    International Nuclear Information System (INIS)

    A radiation bioassay program relies on a set of standard human phantoms to calibrate and assess radioactivity levels inside a human body for radiation protection and nuclear medicine imaging purposes. However, the methodologies in the development and application of anthropomorphic phantoms, both physical and computational, had mostly remained the same for the past 40 years. We herein propose a 3-year research project to develop medical image-based physical and computational phantoms specifically for radiation bioassay applications involving internally deposited radionuclides. The broad, long-term objective of this research was to set the foundation for a systematic paradigm shift away from the anatomically crude phantoms in existence today to realistic and ultimately individual-specific bioassay methodologies. This long-term objective is expected to impact all areas of radiation bioassay involving nuclear power plants, U.S. DOE laboratories, and nuclear medicine clinics.

  17. Bioassay Phantoms Using Medical Images and Computer Aided Manufacturing

    Energy Technology Data Exchange (ETDEWEB)

    Dr. X. Geroge Xu

    2011-01-28

    A radiation bioassay program relies on a set of standard human phantoms to calibrate and assess radioactivity levels inside a human body for radiation protection and nuclear medicine imaging purposes. However, the methodologies in the development and application of anthropomorphic phantoms, both physical and computational, had mostly remained the same for the past 40 years. We herein propose a 3-year research project to develop medical image-based physical and computational phantoms specifically for radiation bioassay applications involving internally deposited radionuclides. The broad, long-term objective of this research was to set the foundation for a systematic paradigm shift away from the anatomically crude phantoms in existence today to realistic and ultimately individual-specific bioassay methodologies. This long-term objective is expected to impact all areas of radiation bioassay involving nuclear power plants, U.S. DOE laboratories, and nuclear medicine clinics.

  18. Computer aided hydraulic design of axial flow pump impeller

    International Nuclear Information System (INIS)

    Pumps are the heart of any power plant and hence their design requires great attention. Computers with their potential for rapid computation can be successfully employed in the design and manufacture of these machines. The paper discusses a program developed for the hydraulic design of axial flow pump impeller. The program, written in FORTRAN 77, is interactive and performs the functions of design calculation, drafting and generation of numerical data for blade manufacture. The drafting function, which makes use of the software ACAD, is carried out automatically by means of suitable interface programs. In addition data for blade manufacture is also generated in either the x-y-z or r-θ-z system. (author). 4 refs., 3 figs

  19. Computer-aided analysis of CCD linear image sensors

    Science.gov (United States)

    Prince, S. S.

    1976-01-01

    Special test equipment and techniques to collect and process image information from charge coupled devices (CCDs) by digital computer were reviewed. The video channel was traced from the CCD to the direct memory access bus of the Interdata Computer. Software was developed to evaluate and characterize a CCD for (1) dark signal versus temperature relationship, (2) calculation of temporal noise magnitude and noise shape for each pixel, (3) spatial noise into the video chain due to dark signal, (4) response versus illumination relationship (gamma), (5) response versus wavelength of illumination (spectral), (6) optimization of forcing functions, and (7) evaluation of an image viewed by a CCD. The basic software differences and specific examples of each program operating on real data are presented.

  20. COMPUTER-AIDED IDENTIFICATION OF ENVIRONMENTAL IMPACTS OF BUSINESSES

    Directory of Open Access Journals (Sweden)

    Halina Marczak

    2015-11-01

    Full Text Available Discussed elements of the computer databases used in “input-output” analysis method to identify enterprise impact on the environment. Presented “input-output” database parameters essential for a company performing road transport of finished products. Presented a method for determining parameters: energy consumption by means of road transport and the emissions amount with exhaust fumes from vehicles. Discussed parameters of the computer databases needed to calculate the amount of fees for use of the environment. These data and amount of fees for environment usage may be useful in assessing the scale of the impact on environment by businesses. Described a method for determining the fee for gases and dust emitted into the air from combustion of fuels in internal combustion engines.

  1. Computer-aided hepatic tumour ablation requirements and preliminary results

    CERN Document Server

    Voirin, D; Amavizca, M; Letoublon, C; Troccaz, J; Voirin, David; Payan, Yohan; Amavizca, Miriam; Letoublon, Christian; Troccaz, Jocelyne

    2002-01-01

    Surgical resection of hepatic tumours is not always possible, since it depends on different factors, among which their location inside the liver functional segments. Alternative techniques consist in local use of chemical or physical agents to destroy the tumour. Radio frequency and cryosurgical ablations are examples of such alternative techniques that may be performed percutaneously. This requires a precise localisation of the tumour placement during ablation. Computer-assisted surgery tools may be used in conjunction with these new ablation techniques to improve the therapeutic efficiency, whilst they benefit from minimal invasiveness. This paper introduces the principles of a system for computer-assisted hepatic tumour ablation and describes preliminary experiments focusing on data registration evaluation. To keep close to conventional protocols, we consider registration of pre-operative CT or MRI data to intra-operative echographic data.

  2. Computer-aided diagnosis of pneumoconiosis in CT images

    International Nuclear Information System (INIS)

    The classification of chest radiographs on pneumoconiosis has been widely used for the purpose of epidemiologic study and mass surveillance in Japan. We are developing an automated method for determining a class of rounded opacities of pneumoconiosis in CT images. The image processing computer is NEXUS 6400 equipped with pipeline processor, and the CT equipment is TCT-900S. CT images are analyzed by the image processing computer. The processes include a smoothing by median filter, a transformation into binary thresholded picture, rejections of frame area (chest wall and mediastinum), labeling of lung field small pictures, identifying pneumoconiotic small rounded opacities and calculations of sizes and profusions. In our investigation by this system, the diagnostic accuracy was 85.7% dealing with 14 CT images. (author)

  3. Computer-Aided Classification of Gastrointestinal Lesions in Regular Colonoscopy

    OpenAIRE

    Mesejo, Pablo; Pizarro, Daniel; Abergel, Armand; Rouquette, Olivier; Beorchia, Sylvain; Poincloux, Laurent; Bartoli, Adrien

    2016-01-01

    We have developed a technique to study how good computers can be at diagnosing gastrointestinal lesions from regular (white light and narrow banded) colonoscopic videos compared to two levels of clinical knowledge (expert and beginner). Our technique includes a novel tissue classification approach which may save clinician's time by avoiding chromoendoscopy, a time-consuming staining procedure using indigo carmine. Our technique also discriminates the severity of individual lesions in patients...

  4. Collaborative Brain-Computer Interface for Aiding Decision-Making

    OpenAIRE

    Poli, Riccardo; Valeriani, Davide; Cinel, Caterina

    2014-01-01

    We look at the possibility of integrating the percepts from multiple non-communicating observers as a means of achieving better joint perception and better group decisions. Our approach involves the combination of a brain-computer interface with human behavioural responses. To test ideas in controlled conditions, we asked observers to perform a simple matching task involving the rapid sequential presentation of pairs of visual patterns and the subsequent decision as whether the two patterns i...

  5. Computer-Aided Process Model For Carbon/Phenolic Materials

    Science.gov (United States)

    Letson, Mischell A.; Bunker, Robert C.

    1996-01-01

    Computer program implements thermochemical model of processing of carbon-fiber/phenolic-matrix composite materials into molded parts of various sizes and shapes. Directed toward improving fabrication of rocket-engine-nozzle parts, also used to optimize fabrication of other structural components, and material-property parameters changed to apply to other materials. Reduces costs by reducing amount of laboratory trial and error needed to optimize curing processes and to predict properties of cured parts.

  6. Computer aided discovery of families of valid inequalities

    DEFF Research Database (Denmark)

    Røpke, Stefan; Cordeau, Jean-Francois; Laporte, Gilbert

    We present a computer program that helps the user discovering new families of valid inequalities for any integer program. It does so by finding simple valid inequalities that are violated by a fractional solution supplied by the user. It is up to the user to generalize these inequalities further....... We present new families of inequalities for the capacitated vehicle routing problem and the traveling salesman problem with pickup and deliveries found using the program....

  7. Computer-aided analysis of the forging process

    OpenAIRE

    Šraml, Matjaž; Stupan, Janez; Potrč, Iztok; Kramberger, Janez

    2012-01-01

    This paper presents computer simulation of the forging process using the finite volume method (FVM). The process of forging is highly non-linear, where both large deformations and continuously changing boundary conditions occur. In most practical cases, the initial billet shape is relatively simple, but the final shape of the end product is often geometrically complex, to the extent that it is commonly obtained using multiple forming stages. Examples of the numerical simulation of the forged ...

  8. Computers and terminals as an aid to international technology transfer

    Science.gov (United States)

    Sweeney, W. T.

    1974-01-01

    As technology transfer becomes more popular and proves to be an economical method for companies of all sizes to take advantage of a tremendous amount of new and available technology from sources all over the world, the introduction of computers and terminals into the international technology transfer process is proving to be a successful method for companies to take part in this beneficial approach to new business opportunities.

  9. CAGD - Computer Aided Gripper Design for a Flexible Gripping System

    OpenAIRE

    Bernd Kuhlenkoetter; Michael Sdahl

    2005-01-01

    This paper is a summary of the recently accomplished research work on flexible gripping systems. The goal is to develop a gripper which can be used for a great amount of geometrically variant workpieces. The economic aspect is of particular importance during the whole development. The high flexibility of the gripper is obtained by three parallel used principles. These are human and computer based analysis of the gripping object as well as mechanical adaptation of the gripper to the object wit...

  10. Augmented Reality Computer-Aided Drawing (AR-CAD)

    OpenAIRE

    ECT Team, Purdue

    2007-01-01

    While Virtual Reality (VR) replaces the entire real world with virtual images, Augmented Reality (AR) superimposes virtual images on the real world. Augmented Reality (a most useful form of Mixed Reality (MR)) is a popular concept for using computers to overlay virtual information onto a view of the real world. In 2000, Phillip Dunston then at the University of Washington in Seattle and his research team presented the initial concept of AR CAD developed for supporting design and construction....

  11. Pocket computers: a new aid to nutritional support.

    OpenAIRE

    1985-01-01

    A program has been written to run on a pocket computer (Sharp PC-1500) that can be used at the bedside to predict the nutritional requirements of patients with a wide range of clinical conditions. The predictions of the program showed good correlation with measured values for energy and nitrogen requirements. The program was used, with good results, in the management of over 100 patients needing nutritional support. The calculation of nutritional requirements for each patient individually fac...

  12. Computer-Aided Design Software for Torsional Analysis

    OpenAIRE

    Griffin, Timothy R.

    1998-01-01

    The goal of this research has been the development of an effective design tool for torsional analysis. In the hopes of achieving this goal the computer program, Torsion 1, has been created. This torsional transfer matrix program provides the user with the ability to easily model multi-rotor systems using a simple user-interface. The program is capable of modeling such components or system characteristics as continuously distributed mass, viscous and structural damping, vibratio...

  13. Creation of Anatomically Accurate Computer-Aided Design (CAD) Solid Models from Medical Images

    Science.gov (United States)

    Stewart, John E.; Graham, R. Scott; Samareh, Jamshid A.; Oberlander, Eric J.; Broaddus, William C.

    1999-01-01

    Most surgical instrumentation and implants used in the world today are designed with sophisticated Computer-Aided Design (CAD)/Computer-Aided Manufacturing (CAM) software. This software automates the mechanical development of a product from its conceptual design through manufacturing. CAD software also provides a means of manipulating solid models prior to Finite Element Modeling (FEM). Few surgical products are designed in conjunction with accurate CAD models of human anatomy because of the difficulty with which these models are created. We have developed a novel technique that creates anatomically accurate, patient specific CAD solids from medical images in a matter of minutes.

  14. Effects of Computer-Aided Manufacturing Technology on Precision of Clinical Metal-Free Restorations

    OpenAIRE

    Ki-Hong Lee; In-Sung Yeo; Wu, Benjamin M.; Jae-Ho Yang; Jung-Suk Han; Sung-Hun Kim; Yang-Jin Yi; Taek-Ka Kwon

    2015-01-01

    Purpose. The purpose of this study was to investigate the marginal fit of metal-free crowns made by three different computer-aided design/computer-aided manufacturing (CAD/CAM) systems. Materials and Methods. The maxillary left first premolar of a dentiform was prepared for all-ceramic crown restoration. Thirty all-ceramic premolar crowns were made, ten each manufactured by the Lava system, Cercon, and Cerec. Ten metal ceramic gold (MCG) crowns served as control. The marginal gap of each samp...

  15. A Multi-Step and Multi-Level Approach for Computer Aided Molecular Design

    DEFF Research Database (Denmark)

    Harper, Peter Mathias; Gani, Rafiqul

    . The problem formulation step incorporates a knowledge base for the identification and setup of the design criteria. Candidate compounds are identified using a multi-level generate and test CAMD solution algorithm capable of designing molecules having a high level of molecular detail. A post solution......A general multi-step approach for setting up, solving and solution analysis of computer aided molecular design (CAMD) problems is presented. The approach differs from previous work within the field of CAMD since it also addresses the need for a computer aided problem formulation and result analysis...

  16. Computer-aided diagnosis of pneumoconiosis abnormalities extracted from chest radiographs scanned with a CCD scanner

    International Nuclear Information System (INIS)

    This paper presents a computer-aided diagnosis for pneumoconiosis radiographs obtained with a common charge-coupled devices (CCD) scanner. Since the current computer-aided diagnosis systems of pneumoconiosis are not practical for medical doctors due to high costs of usage for a special scanner, we propose a novel system which measures abnormalities of pneumoconiosis from lung images obtained with a common CCD scanner. Experimental results of discriminations between normal and abnormal cases for 56 right-lung images including 6 standard pneumoconiosis images have shown that the proposed abnormalities are well extracted according to the standards of pneumoconiosis categories. (author)

  17. Computer Aided Methods & Tools for Separation & Purification of Fine Chemical & Pharmaceutical Products

    DEFF Research Database (Denmark)

    Afonso, Maria B.C.; Soni, Vipasha; Mitkowski, Piotr Tomasz;

    2006-01-01

    An integrated approach that is particularly suitable for solving problems related to product-process design from the fine chemicals, agrochemicals, food and pharmaceutical industries is presented together with the corresponding methods and tools, which forms the basis for an integrated computer...... aided system. The methods and tools are linked through the problems they are able to solve and the associated data-flow. The integrated computer aided system has been used to solve a number of industrial problems and summarized results from a selection, involving separation and purification issues, are...

  18. A Multi-Step and Multi-Level Approach for Computer Aided Molecular Design

    DEFF Research Database (Denmark)

    Harper, Peter Mathias; Gani, Rafiqul

    A general multi-step approach for setting up, solving and solution analysis of computer aided molecular design (CAMD) problems is presented. The approach differs from previous work within the field of CAMD since it also addresses the need for a computer aided problem formulation and result analysis....... The problem formulation step incorporates a knowledge base for the identification and setup of the design criteria. Candidate compounds are identified using a multi-level generate and test CAMD solution algorithm capable of designing molecules having a high level of molecular detail. A post solution...... step for result analysis and verification is included in the methodology. (C) 2000 Elsevier Science Ltd. All rights reserved....

  19. The Development of Computer-Aided Design for Electrical Equipment Selection and Arrangement of 10 Kv Switchgear

    OpenAIRE

    Chernaya Anastassiya; Sokolova Elvira

    2015-01-01

    The paper intends to give an overview of a computer-aided design program application. The research includes two main parts: the development of a computer-aided design for an appropriate switchgear selection and its arrangement in an indoor switchgear layout. Matlab program was used to develop a computer-aided design system. The use of this program considerably simplifies the selection and arrangement of 10 kV switchgear.

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

    OpenAIRE

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

    2014-01-01

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

  1. E-CAI: a novel server to estimate an expected value of Codon Adaptation Index (eCAI

    Directory of Open Access Journals (Sweden)

    Garcia-Vallvé Santiago

    2008-01-01

    Full Text Available Abstract Background The Codon Adaptation Index (CAI is a measure of the synonymous codon usage bias for a DNA or RNA sequence. It quantifies the similarity between the synonymous codon usage of a gene and the synonymous codon frequency of a reference set. Extreme values in the nucleotide or in the amino acid composition have a large impact on differential preference for synonymous codons. It is thence essential to define the limits for the expected value of CAI on the basis of sequence composition in order to properly interpret the CAI and provide statistical support to CAI analyses. Though several freely available programs calculate the CAI for a given DNA sequence, none of them corrects for compositional biases or provides confidence intervals for CAI values. Results The E-CAI server, available at http://genomes.urv.es/CAIcal/E-CAI, is a web-application that calculates an expected value of CAI for a set of query sequences by generating random sequences with G+C and amino acid content similar to those of the input. An executable file, a tutorial, a Frequently Asked Questions (FAQ section and several examples are also available. To exemplify the use of the E-CAI server, we have analysed the codon adaptation of human mitochondrial genes that codify a subunit of the mitochondrial respiratory chain (excluding those genes that lack a prokaryotic orthologue and are encoded in the nuclear genome. It is assumed that these genes were transferred from the proto-mitochondrial to the nuclear genome and that its codon usage was then ameliorated. Conclusion The E-CAI server provides a direct threshold value for discerning whether the differences in CAI are statistically significant or whether they are merely artifacts that arise from internal biases in the G+C composition and/or amino acid composition of the query sequences.

  2. Developing computer aided model for selecting players in badminton

    Directory of Open Access Journals (Sweden)

    Ali Ağılönü

    2009-09-01

    Full Text Available The purpose of this study is to develop a decision support model for selecting the most appropriate players in Badminton via Fuzzy Multi Attribute Decision Making (FMADM algorithm. Developed model has been applied on active Badminton players in age between 9 and 11 among Muğla Province by using the data of player’s physical appropriateness scores and technical observation values in computer environment. In developed model, it has been ensured that using both significant criteria and the weights of criteria make results more sensitive. Finally, it is proved that model’s results are appropriate and consistent.

  3. Computer Aided Ballistic Orbit Classification Around Small Bodies

    Science.gov (United States)

    Villac, Benjamin F.; Anderson, Rodney L.; Pini, Alex J.

    2016-09-01

    Orbital dynamics around small bodies are as varied as the shapes and dynamical states of these bodies. While various classes of orbits have been analyzed in detail, the global overview of relevant ballistic orbits at particular bodies is not easily computed or organized. Yet, correctly categorizing these orbits will ease their future use in the overall trajectory design process. This paper overviews methods that have been used to organize orbits, focusing on periodic orbits in particular, and introduces new methods based on clustering approaches.

  4. Computer aided discovery of families of valid inequalities

    DEFF Research Database (Denmark)

    Røpke, Stefan

    When designing a branch-and-cut method for a specic problem class it is important to know classes of valid inequalities for the problem. We present a computer program that helps the user discovering new families of valid inequalities. It does so by finnding simple valid inequalities that are...... violated by a fractional solution supplied by the user. It is up to the user to generalize these examples further. We will present examples of new families of inequalities for the capacitated vehicle routing problem and the traveling salesman problem with pickup and deliveries found using the program....

  5. Three-dimensional computer aided design system for plant layout

    International Nuclear Information System (INIS)

    The CAD system for three-dimensional plant layout planning, with which the layout of pipings, cable trays, air conditioning ducts and so on in nuclear power plants can be planned and designed effectively in a short period is reported. This system comprises the automatic routing system by storing the rich experience and know-how of designers in a computer as the knowledge, and deciding the layout automatically following the predetermined sequence by using these, the interactive layout system for reviewing the routing results from higher level and modifying to the optimum layout, the layout evaluation system for synthetically evaluating the layout from the viewpoint of the operability such as checkup and maintenance, and the data base system which enables these effective planning and design. In this report, the total constitution of this system and the technical features and effects of the individual subsystems are outlined. In this CAD system for three-dimensional plant layout planning, knowledge engineering, CAD/CAM, computer graphics and other latest technology were introduced, accordingly by applying this system to plant design, the design can be performed quickly, various case studies can be carried out at planning stage, and systematic and optimum layout planning becomes possible. (Kako, I.)

  6. Shell stability analysis in a computer aided engineering (CAE) environment

    Science.gov (United States)

    Arbocz, J.; Hol, J. M. A. M.

    1993-01-01

    The development of 'DISDECO', the Delft Interactive Shell DEsign COde is described. The purpose of this project is to make the accumulated theoretical, numerical and practical knowledge of the last 25 years or so readily accessible to users interested in the analysis of buckling sensitive structures. With this open ended, hierarchical, interactive computer code the user can access from his workstation successively programs of increasing complexity. The computational modules currently operational in DISDECO provide the prospective user with facilities to calculate the critical buckling loads of stiffened anisotropic shells under combined loading, to investigate the effects the various types of boundary conditions will have on the critical load, and to get a complete picture of the degrading effects the different shapes of possible initial imperfections might cause, all in one interactive session. Once a design is finalized, its collapse load can be verified by running a large refined model remotely from behind the workstation with one of the current generation 2-dimensional codes, with advanced capabilities to handle both geometric and material nonlinearities.

  7. Collaborative brain-computer interface for aiding decision-making.

    Directory of Open Access Journals (Sweden)

    Riccardo Poli

    Full Text Available We look at the possibility of integrating the percepts from multiple non-communicating observers as a means of achieving better joint perception and better group decisions. Our approach involves the combination of a brain-computer interface with human behavioural responses. To test ideas in controlled conditions, we asked observers to perform a simple matching task involving the rapid sequential presentation of pairs of visual patterns and the subsequent decision as whether the two patterns in a pair were the same or different. We recorded the response times of observers as well as a neural feature which predicts incorrect decisions and, thus, indirectly indicates the confidence of the decisions made by the observers. We then built a composite neuro-behavioural feature which optimally combines the two measures. For group decisions, we uses a majority rule and three rules which weigh the decisions of each observer based on response times and our neural and neuro-behavioural features. Results indicate that the integration of behavioural responses and neural features can significantly improve accuracy when compared with the majority rule. An analysis of event-related potentials indicates that substantial differences are present in the proximity of the response for correct and incorrect trials, further corroborating the idea of using hybrids of brain-computer interfaces and traditional strategies for improving decision making.

  8. Computer-Aided Design of Photocured Polymer Networks

    Science.gov (United States)

    Sarkar, Swarnavo; Lin-Gibson, Sheng; Chiang, Martin

    Light-initiated free radical polymerization is widely used for manufacturing biomaterials, scaffolds for micomolding, and is being developed as a method for fast 3D fabrication. This process has a large set of control parameters in the composition of the photocurable matrix and the photocuring conditions. But a quantitative map between the choice of parameters and the properties of the resultant polymer is currently unavailable. We present a computational approach to simulate the growth of a polymer network using the stochastic differential equations of reactions and diffusion for a photocuring system. This method allows us to sample trajectories of a growing polymer network in silico. Thus, we provide a computational alternative to synthesize and probe a polymer network for properties like the degree of conversion, structure factor, density of states, and viscosity. We present simulation results that agree with the universal features observed in photopolymerization. Our proposed method enables a thorough and systematic search over the entire parameter space to discover interesting combinations for synthesis.

  9. Computed tomography in predicting smear-negative pulmonary tuberculosis in AIDS patients

    Institute of Scientific and Technical Information of China (English)

    FENG Feng; SHI Yu-xin; XIA Gan-lin; ZHU Ying; LU Hong-zhou; ZHANG Zhi-yong

    2013-01-01

    Background The correct diagnosis of sputum smear-negative pulmonary tuberculosis in AIDS patients is very important to their therapy.We aimed to assess the value of the computed tomography (CT) and clinical findings in predicting smearnegative pulmonary tuberculosis in AIDS patients.Methods A total of 121 AIDS patients suspected of smear-negative pulmonary tuberculosis by clinical and radiographic findings were recruited.Pulmonary tuberculosis was diagnosed in 57 (47.1%) patients.The CT and clinical predictors were selected to diagnose AIDS-related pulmonary tuberculosis through univariate and multivariate Logistic analysis.Results Multivariate analysis showed that five variables,including weight loss,presence of miliary nodules,necrotic lymph node,Iobular consolidation,tree-in-bud sign,were independent predictors of pulmonary tuberculosis in AIDS patients.Predicted scores based on the five variables were used to identify pulmonary tuberculosis.If the predicted score of 3 was taken as the ideal cut-off point in the diagnosis of AIDS-related smear-negative pulmonary tuberculosis,the sensitivity,specificity,positive predictive value,negative predictive value,and accuracy were 84.2%,81.2%,80.0%,85.2%,and 82.6%,respectively.Conclusion The prediction method based on five key factors of clinical and CT findings are useful in guiding the diagnosis of smear-negative pulmonary tuberculosis in AIDS patients.

  10. Custom-Made Computer-Aided-Design/Computer-Aided-Manufacturing Biphasic Calcium-Phosphate Scaffold for Augmentation of an Atrophic Mandibular Anterior Ridge

    Directory of Open Access Journals (Sweden)

    Francesco Guido Mangano

    2015-01-01

    Full Text Available This report documents the clinical, radiographic, and histologic outcome of a custom-made computer-aided-design/computer-aided-manufactured (CAD/CAM scaffold used for the alveolar ridge augmentation of a severely atrophic anterior mandible. Computed tomographic (CT images of an atrophic anterior mandible were acquired and modified into a 3-dimensional (3D reconstruction model; this was transferred to a CAD program, where a custom-made scaffold was designed. CAM software generated a set of tool-paths for the manufacture of the scaffold on a computer-numerical-control milling machine into the exact shape of the 3D design. A custom-made scaffold was milled from a synthetic micromacroporous biphasic calcium phosphate (BCP block. The scaffold closely matched the shape of the defect: this helped to reduce the time for the surgery and contributed to good healing. One year later, newly formed and well-integrated bone was clinically available, and two implants (AnyRidge, MegaGen, Gyeongbuk, South Korea were placed. The histologic samples retrieved from the implant sites revealed compact mature bone undergoing remodelling, marrow spaces, and newly formed trabecular bone surrounded by residual BCP particles. This study demonstrates that custom-made scaffolds can be fabricated by combining CT scans and CAD/CAM techniques. Further studies on a larger sample of patients are needed to confirm these results.

  11. Custom-Made Computer-Aided-Design/Computer-Aided-Manufacturing Biphasic Calcium-Phosphate Scaffold for Augmentation of an Atrophic Mandibular Anterior Ridge.

    Science.gov (United States)

    Mangano, Francesco Guido; Zecca, Piero Antonio; van Noort, Ric; Apresyan, Samvel; Iezzi, Giovanna; Piattelli, Adriano; Macchi, Aldo; Mangano, Carlo

    2015-01-01

    This report documents the clinical, radiographic, and histologic outcome of a custom-made computer-aided-design/computer-aided-manufactured (CAD/CAM) scaffold used for the alveolar ridge augmentation of a severely atrophic anterior mandible. Computed tomographic (CT) images of an atrophic anterior mandible were acquired and modified into a 3-dimensional (3D) reconstruction model; this was transferred to a CAD program, where a custom-made scaffold was designed. CAM software generated a set of tool-paths for the manufacture of the scaffold on a computer-numerical-control milling machine into the exact shape of the 3D design. A custom-made scaffold was milled from a synthetic micromacroporous biphasic calcium phosphate (BCP) block. The scaffold closely matched the shape of the defect: this helped to reduce the time for the surgery and contributed to good healing. One year later, newly formed and well-integrated bone was clinically available, and two implants (AnyRidge, MegaGen, Gyeongbuk, South Korea) were placed. The histologic samples retrieved from the implant sites revealed compact mature bone undergoing remodelling, marrow spaces, and newly formed trabecular bone surrounded by residual BCP particles. This study demonstrates that custom-made scaffolds can be fabricated by combining CT scans and CAD/CAM techniques. Further studies on a larger sample of patients are needed to confirm these results. PMID:26064701

  12. An Integrated Geometric Modeling Methodology for 2.5D Cylindrical Prismatic Part for Computer Aided Process Planning

    OpenAIRE

    Viswa Mohan Pedagopu; Manish Kumar

    2014-01-01

    The field of solid modeling has created numerous techniques for unambiguous computer representations of three-dimensional objects. Its data structures and algorithms have been used in a broad range of applications: Computer-Aided Design and Computer-Aided Manufacturing (CAD/ CAM), robotics, computer vision, computer graphics and visualization, virtual reality, etc. This research paper is used to generate process plan from feature-based modeling, based on an integrated geometric modeling syste...

  13. Discuss the Development of Computer-Aided Industrial Design Technology

    Directory of Open Access Journals (Sweden)

    Jun Yao

    2013-01-01

    Full Text Available The direction of the development of the industrial design gradually approaches mechanical-electrical integration and informational and electronic products. With an increasing improvement of its technical content, and better social economic conditions, peoples consumption concept are getting more and more different. Consumer concerns not just the functionality and quality of the product, more and more people are starting to focus on the appearance of the product, degree of innovation, environmental protection, and so on, which brings a higher degree of difficulty to the industrial technology. It is because the increasing demands of people and the industrial design, many scholars are increasingly concerned about the industrial design in recent years. With the continuous development of computer technology, a wide variety of hardware and software are developed, and a variety of ever-changing technologies are attracting the industrial design talents as well.

  14. Computer-aided design of broad band reflection type amplifiers

    DEFF Research Database (Denmark)

    Hammershaimb, Edgar; Jeppesen, Palle; Schjær-Jacobsen, Hans

    1974-01-01

    Microwave negative resistance reflection type amplifiers using stable transferred electron devices (TED's) are optimized by numerical optimization techniques programmed for an interactive graphic datascreen. The small signal impedance of packaged TED's is measured on an automatic network analyzer....... At the same time the impedance of unpackaged devices are obtained by on-line correction for the package parasitics. The microwave circuit chosen is a multiple slug coaxial cavity, that is modelled by sections of lossy transmission lines including step susceptances. The measured small signal impedance...... of the packaged TED's and the cavity model are used in a direct optimization procedure, in which the calculated minimum gain in the prescribed frequency range is progressively maximized by adjusting the lengths, characteristic impedances and positions of the slugs. The computed results are displayed...

  15. Computer aided optimal design of heat exchanger networks

    International Nuclear Information System (INIS)

    A method for finding the best (optimal) operating layout of heat exchangers in complicated thermal networks is developed in this paper. Computer algorithms are developed that take advantage of pinch technology and economic considerations, and exergetic constraints as well as conventional heat and mass balances. The authors goals were to achieve minimum loss of exergy between hot and cold streams subject to practical system constraints. Furthermore, resulting networks should be limited to no more units than the theoretical minimum. The ultimate goal was to minimize investment and operating costs for a set of fixed overall system constraints. The influence of the minimum temperature difference on capital cost, heat transfer area, exergetic losses and second law efficiency of various heat exchangers in the network is presented

  16. A Forth interpreter and compiler's study for computer aided design

    International Nuclear Information System (INIS)

    The wide field of utilization of FORTH leads us to develop an interpreter. It has been implemented on a MC 68000 microprocessor based computer, with ASTERIX, a UNIX-like operating system (real time system written by C.E.A.). This work has been done in two different versions: - The first one, fully written in C language, assures a good portability on a wide variety of microprocessors. But the performance estimations show off excessive execution times, and lead to a new optimized version. - This new version is characterized by the compilation of the most frequently used words of the FORTH basis. This allows us to get an interpreter with good performances and an execution speed close to the resulting one of the C compiler. (author)

  17. Computer aided power flow software engineering and code generation

    Energy Technology Data Exchange (ETDEWEB)

    Bacher, R. [Swiss Federal Inst. of Tech., Zuerich (Switzerland)

    1995-12-31

    In this paper a software engineering concept is described which permits the automatic solution of a non-linear set of network equations. The power flow equation set can be seen as a defined subset of a network equation set. The automated solution process is the numerical Newton-Raphson solution process of the power flow equations where the key code parts are the numeric mismatch and the numeric Jacobian term computation. It is shown that both the Jacobian and the mismatch term source code can be automatically generated in a conventional language such as Fortran or C. Thereby one starts from a high level, symbolic language with automatic differentiation and code generation facilities. As a result of this software engineering process an efficient, very high quality Newton-Raphson solution code is generated which allows easier implementation of network equation model enhancements and easier code maintenance as compared to hand-coded Fortran or C code.

  18. Computer aided power flow software engineering and code generation

    Energy Technology Data Exchange (ETDEWEB)

    Bacher, R. [Swiss Federal Inst. of Tech., Zuerich (Switzerland)

    1996-02-01

    In this paper a software engineering concept is described which permits the automatic solution of a non-linear set of network equations. The power flow equation set can be seen as a defined subset of a network equation set. The automated solution process is the numerical Newton-Raphson solution process of the power flow equations where the key code parts are the numeric mismatch and the numeric Jacobian term computation. It is shown that both the Jacobian and the mismatch term source code can be automatically generated in a conventional language such as Fortran or C. Thereby one starts from a high level, symbolic language with automatic differentiation and code generation facilities. As a result of this software engineering process an efficient, very high quality newton-Raphson solution code is generated which allows easier implementation of network equation model enhancements and easier code maintenance as compared to hand-coded Fortran or C code.

  19. Computer aided determination of porosity in sintered steels

    Directory of Open Access Journals (Sweden)

    L.A. Dobrzański

    2009-08-01

    Full Text Available Purpose: Purpose of this paper was to apply a computer method of open porosity analysis for determination of porosity in sintered Astaloy CrL and CrM powders.Design/methodology/approach: The powders used in the present papier are pre-alloyed iron-base powders containing low amounts of chromium and molybdenum. The amount of graphite which is mixed with the iron-base powder is 0.6% and lubricant is 0.75%. Green compacts were sintered in a vacuum furnace at 1120ºC for 30 minutes in vacuum and rapidly cooled in nitrogen at four different rates: high cooling (7 ºC/s and 6.5 ºC/s and medium cooling (1.6ºC/s low cooling (0.3 ºC/s. Next the samples were tempered in vacuum in the same furnace at 200ºC for 60 minutes and cooled in nitrogen, with the exception of low cooling. Obtained samples were examined by light optical microscopy (LOM for microstructure observation and scanning electron microscopy (SEM.Findings: The investigations of porosity in the pre-alloyed steels were performed using ”Image-Pro Plus 4.5” computer program. Leica light microscope (MEFA4 was applied to prepare series of micrographs. The microstructures were observed at 100x magnification and recorded as*jpg files. After calibration of the digital images, the perimeter, area, diameter, roundness, Feret max were calculated.Practical implications: The program has some limitations (built in mathematical functions, which made difficult to obtain some results automatically.Originality/value: The obtained results prove that this program is very useful in the statistical analysis of microstructures, because it saves the time during calculations and is well suited for checking sintered materials.

  20. The computer-aided operation of the N4 series

    International Nuclear Information System (INIS)

    Designed at the beginning of the eighties, subject of many months of evaluation and validation between 1987 and 1996 on a full scope simulator, the computer-based control room and the fully integrated computerised I and C system of the N4 series are now under operation. Today, Chooz NPP unit 1 and 2 are connected to the French grid (since 1996) and the unit of Civaux 1 is in the final phase of commissioning tests. Start up of the last (Civaux 2) is scheduled in summer 1998. The commissioning hitches inherent to any innovation have been resolved, the safety authority has granted operating licenses. This short but significant operating time associated to the commissioning phases have generated a first positive experience feedback which has consolidated the decision made by EDF in the design of this project, as well on the MMI point of view as on the I and C architecture one. Finally it has led to the decision taken by EDF, its European partners in the EURs (European Utilities Requirements) and the German utilities partnering the EPR project (European Pressurised Reactor), to choose this control-room concept for future plants. (author)

  1. Computer aided surgery. Current status and future directions

    International Nuclear Information System (INIS)

    This review describes topics in the title in the order of 3D model reconstruction and therapeutic planning based on images before surgery; registration of the actual images in virtual physical space of the patient who is under surgical operation, to the preoperative ones with use of 3D-position sensor, ultrasonics, endoscopy and X-diaphanoscopy; and their accuracy analysis. Images before surgery usually obtained with CT and MR are reconstructed in 3D for the purpose of therapeutic planning by segmentation of the target organ/site, surrounding organs, bones and blood vessels. Navigation system at the surgery functions to make the images obtained before and during operation to be integrated for their registration and displaying. Usually, the optical marker and camera both equipped in the endoscope, and position sensor (tracker) are used for integration in the operation coordinate system. For this, the actual pictures at liver operation are given. For accuracy analysis there is a theory of target registration error, which has been established on FDA demands. In future, development of technology concerned in this field like that of robot, bio-dynamics, biomaterials, sensor and high performance computing together with 4D document of surgery for feed-back to technology are desirable for the systematic growing of this surgical technology. (T.I.)

  2. Computer-aided control of high-quality cast iron

    Directory of Open Access Journals (Sweden)

    S. Pietrowski

    2008-04-01

    Full Text Available The study discusses the possibility of control of the high-quality grey cast iron and ductile iron using the author’s genuine computer programs. The programs have been developed with the help of algorithms based on statistical relationships that are said to exist between the characteristic parameters of DTA curves and properties, like Rp0,2, Rm, A5 and HB. It has been proved that the spheroidisation and inoculation treatment of cast iron changes in an important way the characteristic parameters of DTA curves, thus enabling a control of these operations as regards their correctness and effectiveness, along with the related changes in microstructure and mechanical properties of cast iron. Moreover, some examples of statistical relationships existing between the typical properties of ductile iron and its control process were given for cases of the melts consistent and inconsistent with the adopted technology.A test stand for control of the high-quality cast iron and respective melts has been schematically depicted.

  3. Aiding Design of Wave Energy Converters via Computational Simulations

    Science.gov (United States)

    Jebeli Aqdam, Hejar; Ahmadi, Babak; Raessi, Mehdi; Tootkaboni, Mazdak

    2015-11-01

    With the increasing interest in renewable energy sources, wave energy converters will continue to gain attention as a viable alternative to current electricity production methods. It is therefore crucial to develop computational tools for the design and analysis of wave energy converters. A successful design requires balance between the design performance and cost. Here an analytical solution is used for the approximate analysis of interactions between a flap-type wave energy converter (WEC) and waves. The method is verified using other flow solvers and experimental test cases. Then the model is used in conjunction with a powerful heuristic optimization engine, Charged System Search (CSS) to explore the WEC design space. CSS is inspired by charged particles behavior. It searches the design space by considering candidate answers as charged particles and moving them based on the Coulomb's laws of electrostatics and Newton's laws of motion to find the global optimum. Finally the impacts of changes in different design parameters on the power takeout of the superior WEC designs are investigated. National Science Foundation, CBET-1236462.

  4. Computer aided detection of oral lesions on CT images

    International Nuclear Information System (INIS)

    Oral lesions are important findings on computed tomography (CT) images. In this study, a fully automatic method to detect oral lesions in mandibular region from dental CT images is proposed. Two methods were developed to recognize two types of lesions namely (1) Close border (CB) lesions and (2) Open border (OB) lesions, which cover most of the lesion types that can be found on CT images. For the detection of CB lesions, fifteen features were extracted from each initial lesion candidates and multi layer perceptron (MLP) neural network was used to classify suspicious regions. Moreover, OB lesions were detected using a rule based image processing method, where no feature extraction or classification algorithm were used. The results were validated using a CT dataset of 52 patients, where 22 patients had abnormalities and 30 patients were normal. Using non-training dataset, CB detection algorithm yielded 71% sensitivity with 0.31 false positives per patient. Furthermore, OB detection algorithm achieved 100% sensitivity with 0.13 false positives per patient. Results suggest that, the proposed framework, which consists of two methods, has the potential to be used in clinical context, and assist radiologists for better diagnosis

  5. Computer aided detection of oral lesions on CT images

    Science.gov (United States)

    Galib, S.; Islam, F.; Abir, M.; Lee, H. K.

    2015-12-01

    Oral lesions are important findings on computed tomography (CT) images. In this study, a fully automatic method to detect oral lesions in mandibular region from dental CT images is proposed. Two methods were developed to recognize two types of lesions namely (1) Close border (CB) lesions and (2) Open border (OB) lesions, which cover most of the lesion types that can be found on CT images. For the detection of CB lesions, fifteen features were extracted from each initial lesion candidates and multi layer perceptron (MLP) neural network was used to classify suspicious regions. Moreover, OB lesions were detected using a rule based image processing method, where no feature extraction or classification algorithm were used. The results were validated using a CT dataset of 52 patients, where 22 patients had abnormalities and 30 patients were normal. Using non-training dataset, CB detection algorithm yielded 71% sensitivity with 0.31 false positives per patient. Furthermore, OB detection algorithm achieved 100% sensitivity with 0.13 false positives per patient. Results suggest that, the proposed framework, which consists of two methods, has the potential to be used in clinical context, and assist radiologists for better diagnosis.

  6. User-friendly computer-aided integrated optics simulator

    Science.gov (United States)

    Perrone, Guido; Petazzi, Diego; Montrosset, Ivo

    1993-04-01

    We have developed a user friendly program to analyze the electromagnetic behavior of general integrated optics circuits with a two-dimensional Beam Propagation Method. As a graphical interface for the description of the circuit under analysis we used a file produced by the optical layout generator Sigraph-Optik (copyright by Siemens-Nixdorf), while we acquire all the parameters necessary for the simulation via pop-up menus or a command file. The electromagnetic analysis is at the moment performed with the Beam Propagation Method based on FFT but we are working to extend it to a Crank-Nicholson finite difference scheme with transparent boundary conditions to minimize the computational window. The program final output are color maps and data files containing the effective refractive index and the field amplitude and phase. It is then possible to carry out a post processing on such files to make three dimensional graphs that summarize the circuit performance, to extract two dimensional plots at particular circuit sections and to project the field on the local normal modes of the waveguides. Examples of the simulation capabilities are given.

  7. Computer-Aided Approaches for Targeting HIVgp41

    Directory of Open Access Journals (Sweden)

    William J. Allen

    2012-08-01

    Full Text Available Virus-cell fusion is the primary means by which the human immunodeficiency virus-1 (HIV delivers its genetic material into the human T-cell host. Fusion is mediated in large part by the viral glycoprotein 41 (gp41 which advances through four distinct conformational states: (i native, (ii pre-hairpin intermediate, (iii fusion active (fusogenic, and (iv post-fusion. The pre-hairpin intermediate is a particularly attractive step for therapeutic intervention given that gp41 N-terminal heptad repeat (NHR and C‑terminal heptad repeat (CHR domains are transiently exposed prior to the formation of a six-helix bundle required for fusion. Most peptide-based inhibitors, including the FDA‑approved drug T20, target the intermediate and there are significant efforts to develop small molecule alternatives. Here, we review current approaches to studying interactions of inhibitors with gp41 with an emphasis on atomic-level computer modeling methods including molecular dynamics, free energy analysis, and docking. Atomistic modeling yields a unique level of structural and energetic detail, complementary to experimental approaches, which will be important for the design of improved next generation anti-HIV drugs.

  8. Computer aided production planning - SWZ system of order verification

    Science.gov (United States)

    Krenczyk, D.; Skolud, B.

    2015-11-01

    SWZ (System of order verification) is a computer implementation of the methodology that support fast decision making on the acceptability of a production order, which allows to determine not the best possible solution, but admissible solution that is possible to find in an acceptable time (feasible solution) and acceptable due to the existing constraints. The methodology uses the propagation of constraints techniques and reduced to test a sequence of arbitrarily selected conditions. Fulfilment of all the conditions (the conjunction) provides the ability to perform production orders. In the paper examples of the application of SWZ system comprising the steps of planning and control is presented. The obtained results allowing the determination of acceptable production flow in the system - determination of the manufacturing system parameters those that ensure execution of orders in time under the resource constraints. SWZ also allows to generate the dispatching rules as a sequence of processing operations for each production resource, performed periodically during the production flow in the system. Furthermore the example of SWZ and simulation system integration is shown. SWZ has been enhanced with a module generating files containing the script code of the system model using the internal language of simulation and visualization system.

  9. Computer aided design of fast neutron therapy units

    International Nuclear Information System (INIS)

    Conceptual design of a radiation-therapy unit using fusion neutrons is presently being considered by KMS Fusion, Inc. As part of this effort, a powerful and versatile computer code, TBEAM, has been developed which enables the user to determine physical characteristics of the fast neutron beam generated in the facility under consideration, using certain given design parameters of the facility as inputs. TBEAM uses the method of statistical sampling (Monte Carlo) to solve the space, time and energy dependent neutron transport equation relating to the conceptual design described by the user-supplied input parameters. The code traces the individual source neutrons as they propagate throughout the shield-collimator structure of the unit, and it keeps track of each interaction by type, position and energy. In its present version, TBEAM is applicable to homogeneous and laminated shields of spherical geometry, to collimator apertures of conical shape, and to neutrons emitted by point sources or such plate sources as are used in neutron generators of various types. TBEAM-generated results comparing the performance of point or plate sources in otherwise identical shield-collimator configurations are presented in numerical form. (H.K.)

  10. Computer-aided prototype system for nose surgery.

    Science.gov (United States)

    Lee, T Y; Lin, C H; Lin, H Y

    2001-12-01

    Rhinoplasty, or surgery to reshape the nose, is one of the most common of all plastic-surgery procedures. Rhinoplasty can enhance a patient's appearance and self-confidence, may also correct a birth defect or injury, or help relieve some breathing problem. In this paper, we present a three-dimensional (3-D) surgical simulation system, which can assist surgeons in planning rhinoplasty procedures. This system employs computer graphics and image-processing techniques for the simulation of a rhinoplasty. Although the presented algorithms themselves are not new, the proposed system exploits the new idea to apply 3-D morphing for rhinoplasty, and simulation results are useful for the physicians. According to patients' expectation of what they would like their noses to look like, our system simulates expected results. Our tools provide quantitative measurements of a nose structure. Using these quantitative results, surgeons can arrange appropriate preoperative plans for patients. Finally, experimental results and experiences are reported to evaluate the usefulness of the proposed system. PMID:11759833

  11. Evolution of facility layout requirements and CAD [computer-aided design] system development

    International Nuclear Information System (INIS)

    The overall configuration of the Superconducting Super Collider (SSC) including the infrastructure and land boundary requirements were developed using a computer-aided design (CAD) system. The evolution of the facility layout requirements and the use of the CAD system are discussed. The emphasis has been on minimizing the amount of input required and maximizing the speed by which the output may be obtained. The computer system used to store the data is also described

  12. Computer aided diagnosis of acute abdominal pain at Middlesbrough General Hospital.

    OpenAIRE

    Scarlett, P. Y.; Cooke, W M; Clarke, D.; Bates, C.; Chan, M.

    1986-01-01

    This presentation reports the experience of the surgical house staff and registrars at Middlesbrough General Hospital who used a desk-top computer system to support their clinical diagnosis of acute abdominal pain. The results cover a two year period and are compared with a baseline period of one year. Substantial benefits followed the introduction of the computer-aided diagnostic support system; increased diagnostic accuracy of the whole surgical team, reduction in negative laparotomy rates,...

  13. A Computer Aided Diagnosis System for Lung Cancer Detection Using Support Vector Machine

    OpenAIRE

    Gomathi, M; P. Thangaraj

    2010-01-01

    Problem statement: Computer Tomography (CT) has been considered as the most sensitive imaging technique for early detection of lung cancer. Approach: On the other hand, there is a requirement for automated methodology to make use of large amount of data obtained CT images. Computer Aided Diagnosis (CAD) can be used efficiently for early detection of Lung Cancer. Results: The usage of existing CAD system for early detection of lung cancer with the help of CT images has ...

  14. Lipophilicity in computer-aided drug design: new tools and applications

    OpenAIRE

    Oberhauser, Nils

    2014-01-01

    In the past decades computer-aided drug design (CADD) has become an integral part in the process of drug development. Computational methods require accurate description of chemical forces and interactions, of which the complex contribution of hydrophobicity is often only described by van der Waals energies. One way to achieve a more accurate description of hydrophobicity is the application of the molecular lipophilicity potential (MLP). The MLP is a molecular interaction field (MIF) that is b...

  15. Human Factors of Integrating Speech and Manual Input Devices: The Case of Computer Aided Design

    OpenAIRE

    Khalid, H. M.

    1990-01-01

    The thesis investigates integrating the use of speech input and manual input devices in human-computer systems. The domain of computer aided design (CAD) is used as a case study. A methodology for empirical evaluation of CAD systems is presented. The methodology is based on a framework that describes the input/output processes presumed to underlie performance in design activities, using behaviour protocols and performance indices as data. For modelling system behaviour, a framework d...

  16. Proceedings of the 1993 Conference on Intelligent Computer-Aided Training and Virtual Environment Technology

    Science.gov (United States)

    Hyde, Patricia R.; Loftin, R. Bowen

    1993-01-01

    The volume 2 proceedings from the 1993 Conference on Intelligent Computer-Aided Training and Virtual Environment Technology are presented. Topics discussed include intelligent computer assisted training (ICAT) systems architectures, ICAT educational and medical applications, virtual environment (VE) training and assessment, human factors engineering and VE, ICAT theory and natural language processing, ICAT military applications, VE engineering applications, ICAT knowledge acquisition processes and applications, and ICAT aerospace applications.

  17. SINCRO/CAR: An interactive numerical system for computer-aided control engineering and maintenance

    International Nuclear Information System (INIS)

    This presentation describes a dialogue-oriented software implemented on a portable computer for computer-aided engineering and training in control instrumentation and also for on-line verification of the performances of the analog controllers installed on power plants. The SINCRO/CAR software includes algorithms for controller design, simulation, identification, optimization, frequency response and real time data acquisition. Various results obtained on fossil-fired and nuclear plants are given to illustrate the efficiency of the SINCRO/CAR software

  18. An Architecture for Computer-Aided Detection and Radiologic Measurement of Lung Nodules in Clinical Trials

    OpenAIRE

    Aberle, Denise R.; Lien Tran; Goldin, Jonathan G; Iva Petkovska; McNitt-Gray, Michael F.; Sumit Shah; Brown, Matthew S; Richard Pais; Peiyuan Qing

    2007-01-01

    Summary: Computer tomography (CT) imaging plays an important role in cancer detection and quantitative assessment in clinical trials. High-resolution imaging studies on large cohorts of patients generate vast data sets, which are infeasible to analyze through manual interpretation. In this article we describe a comprehensive architecture for computer-aided detection (CAD) and surveillance on lung nodules in CT images. Central to this architecture are the analytic components: an automated nodu...

  19. Defining Spaces of Potential Art: The significance of representation in computer-aided creativity

    DEFF Research Database (Denmark)

    Dahlstedt, Palle

    2005-01-01

    formal description, and the ways of navigating the space are defined by the choice of genetic operators (e.g., mutations). In creative systems, such as computer-aided music composition tools, these choices determine the efficiency of the system, in terms of the diversity of the results, the degree of...

  20. Standalone computer-aided detection compared to radiologists' performance for the detection of mammographic masses

    NARCIS (Netherlands)

    Hupse, R.; Samulski, M.; Lobbes, M.; Heeten, A. den; Imhof-Tas, M.W.; Beijerinck, D.; Pijnappel, R.; Hitge-Boetes, C.; Karssemeijer, N.

    2013-01-01

    OBJECTIVES: We developed a computer-aided detection (CAD) system aimed at decision support for detection of malignant masses and architectural distortions in mammograms. The effect of this system on radiologists' performance depends strongly on its standalone performance. The purpose of this study w

  1. Gathering Empirical Evidence Concerning Links between Computer Aided Design (CAD) and Creativity

    Science.gov (United States)

    Musta'amal, Aede Hatib; Norman, Eddie; Hodgson, Tony

    2009-01-01

    Discussion is often reported concerning potential links between computer-aided designing and creativity, but there is a lack of systematic enquiry to gather empirical evidence concerning such links. This paper reports an indication of findings from other research studies carried out in contexts beyond general education that have sought evidence…

  2. Simulation tools for computer-aided design and numerical investigations of high-power gyrotrons

    International Nuclear Information System (INIS)

    Modelling and simulation are essential tools for computer-aided design (CAD), analysis and optimization of high-power gyrotrons used as radiation sources for electron cyclotron resonance heating (ECRH) and current drive (ECCD) of magnetically confined plasmas in the thermonuclear reactor ITER. In this communication, we present the current status of our simulation tools and discuss their further development.

  3. Improving a Student's Reading Comprehension Skills by Teaching Computer Aided Design.

    Science.gov (United States)

    Bentivolio, Kerry

    A serendipitous observation resulted in an examination of the effectiveness of using a computer aided design course to improve high school student's strategic reading skills. Conducted in a 3 month semester period, the study relied on teacher observations, student questionnaires, and personal interviews. More than 75% of the students in the…

  4. A Computer Aided System for Correlation and Prediction of Phase Equilibrium Data

    DEFF Research Database (Denmark)

    Nielsen, T.L.; Gani, Rafiqul

    2001-01-01

    based on mathematical programming. This paper describes the development of a computer aided system for the systematic derivation of appropriate property models to be used in the service role for a specified problem. As a first step, a library of well-known property models ha's been developed and a...

  5. Computer aided diagnosis in digital chest radiography: evaluation of pulmonary emphysema in COPD patients

    OpenAIRE

    Coppini, Giuseppe; Ferdeghini, Ezio Maria; Paterni, Marco; Tonelli, Lucia; Bauleo, Carolina; Monti, Simonetta; Miniati, Massimo

    2004-01-01

    Computer-aided quantitative analysis of chest radiographs is a useful tool in describing alterations in lung shape that occur in patients with emphysema. In the present study, the analysis was limited to the lateral chest radiograph, but we expect that the use of the postero-anterior view may further improve the rate of correct classification.

  6. Technology and Jobs: Computer-Aided Design. Numerical-Control Machine-Tool Operators. Office Automation.

    Science.gov (United States)

    Stanton, Michael; And Others

    1985-01-01

    Three reports on the effects of high technology on the nature of work include (1) Stanton on applications and implications of computer-aided design for engineers, drafters, and architects; (2) Nardone on the outlook and training of numerical-control machine tool operators; and (3) Austin and Drake on the future of clerical occupations in automated…

  7. Data Management Standards in Computer-aided Acquisition and Logistic Support (CALS)

    Science.gov (United States)

    Jefferson, David K.

    1990-01-01

    Viewgraphs and discussion on data management standards in computer-aided acquisition and logistic support (CALS) are presented. CALS is intended to reduce cost, increase quality, and improve timeliness of weapon system acquisition and support by greatly improving the flow of technical information. The phase 2 standards, industrial environment, are discussed. The information resource dictionary system (IRDS) is described.

  8. The computer-aided system for the high resolution SQUID-magnetometer

    International Nuclear Information System (INIS)

    The described computer-aided system for the high resolution SQUID-magnetometer permits one to regulate the thermostat temperature, vary the working magnetic field, change the sample position and allow acquisition and processing of signal from a SQUID. A brief description of electronics and the principal program algorithms is proposed. 7 refs.; 6 figs

  9. The Effects of Computer-Aided Concept Cartoons and Outdoor Science Activities on Light Pollution

    Science.gov (United States)

    Aydin, Güliz

    2015-01-01

    The purpose of this study is to create an awareness of light pollution on seventh grade students via computer aided concept cartoon applications and outdoor science activities and to help them develop solutions; and to determine student opinions on the practices carried out. The study was carried out at a middle school in Mugla province of Aegean…

  10. Persons with Alzheimer's Disease Make Phone Calls Independently Using a Computer-Aided Telephone System

    Science.gov (United States)

    Perilli, Viviana; Lancioni, Giulio E.; Singh, Nirbhay N.; O'Reilly, Mark F.; Sigafoos, Jeff; Cassano, Germana; Cordiano, Noemi; Pinto, Katia; Minervini, Mauro G.; Oliva, Doretta

    2012-01-01

    This study assessed whether four patients with a diagnosis of Alzheimer's disease could make independent phone calls via a computer-aided telephone system. The study was carried out according to a non-concurrent multiple baseline design across participants. All participants started with baseline during which the telephone system was not available,…

  11. Computer Aided Methodology for Simultaneous Synthesis, Design & Analysis of Chemical Products-Processes

    DEFF Research Database (Denmark)

    d'Anterroches, Loïc; Gani, Rafiqul

    2006-01-01

    A new combined methodology for computer aided molecular design and process flowsheet design is presented. The methodology is based on the group contribution approach for prediction of molecular properties and design of molecules. Using the same principles, process groups have been developed toget...

  12. NEW METHODS OF PRODUCT CLASSIFICATION FOR COMPUTER AIDED PROCESS PLANNING SYSTEMS

    OpenAIRE

    Kuric, Ivan; Kuba, Jozef

    2007-01-01

    Classification of engineering parts is a very demanding activity especially in process planning. It is one of the important methods utilised in the group technology approach to computer aided process planning. This paper deals with a new method of classification, which extends the possibility of engineering part classification, especially for the process planning of non-cutting processes (forging, casting, etc.)

  13. Graphical and Normative Analysis of Binocular Vision by Mini Computer: A Teaching Aid and Clinical Tool.

    Science.gov (United States)

    Kees, Martin; Schor, Clifton

    1981-01-01

    An inexpensive computer graphics systems (Commodore PET), used as a video aid for teaching students advanced case analysis, is described. The course provides students with the analytical tools for evaluating with graphical and statistical techniques and treating with lenses, prisms, and orthoptics various anomalies of binocular vision. (MLW)

  14. Computer Aided Design of Kaplan Turbine Piston with SolidWorks

    OpenAIRE

    Camelia Jianu

    2010-01-01

    The paper presents the steps for 3D computer aided design (CAD) of Kaplan turbine piston made in SolidWorks.The present paper is a tutorial for a Kaplan turbine piston 3D geometry, which is dedicaded to the Parts Sketch and Parts Features design and Drawing Geometry and Drawing Annotation.

  15. Computer-aided diagnosis system for bone scintigrams from Japanese patients: importance of training database

    DEFF Research Database (Denmark)

    Horikoshi, Hiroyuki; Kikuchi, Akihiro; Onoguchi, Masahisa;

    2012-01-01

    Computer-aided diagnosis (CAD) software for bone scintigrams have recently been introduced as a clinical quality assurance tool. The purpose of this study was to compare the diagnostic accuracy of two CAD systems, one based on a European and one on a Japanese training database, in a group of bone...

  16. Application of computer-aided multi-scale modelling framework - Aerosol case study

    DEFF Research Database (Denmark)

    Heitzig, Martina; Gregson, Christopher; Sin, Gürkan;

    2011-01-01

    A computer-aided modelling tool for efficient multi-scale modelling has been developed and is applied to solve a multi-scale modelling problem related to design and evaluation of fragrance aerosol products. The developed modelling scenario spans three length scales and describes how droplets...

  17. Effect of Computer-Aided Perspective Drawings on Spatial Orientation and Perspective Drawing Achievement

    Science.gov (United States)

    Kurtulus, Aytac

    2011-01-01

    The aim of this study is to investigate the effect of computer-aided Perspective Drawings on eighth grade primary school students' achievement in Spatial Orientation and Perspective Drawing. The study made use of pre-test post-test control group experimental design. The study was conducted with thirty 8th grade students attending a primary school…

  18. SMART USE OF COMPUTER-AIDED SPERM ANALYSIS (CASA) TO CHARACTERIZE SPERM MOTION

    Science.gov (United States)

    Computer-aided sperm analysis (CASA) has evolved over the past fifteen years to provide an objective, practical means of measuring and characterizing the velocity and parttern of sperm motion. CASA instruments use video frame-grabber boards to capture multiple images of spermato...

  19. An Empathic Avatar in a Computer-Aided Learning Program to Encourage and Persuade Learners

    Science.gov (United States)

    Chen, Gwo-Dong; Lee, Jih-Hsien; Wang, Chin-Yeh; Chao, Po-Yao; Li, Liang-Yi; Lee, Tzung-Yi

    2012-01-01

    Animated pedagogical agents with characteristics such as facial expressions, gestures, and human emotions, under an interactive user interface are attractive to students and have high potential to promote students' learning. This study proposes a convenient method to add an embodied empathic avatar into a computer-aided learning program; learners…

  20. The methodology of computer-aided design of means of measuring the integral purpose

    Directory of Open Access Journals (Sweden)

    В.П. Бабак

    2007-02-01

    Full Text Available  In article is offered a principle of building and achievement of a technical devises of technological parameters control of travel, location, speed etc on basis of computer-aided design system methods is developed of authors.

  1. Experiments Using Cell Phones in Physics Classroom Education: The Computer-Aided "g" Determination

    Science.gov (United States)

    Vogt, Patrik; Kuhn, Jochen; Muller, Sebastian

    2011-01-01

    This paper continues the collection of experiments that describe the use of cell phones as experimental tools in physics classroom education. We describe a computer-aided determination of the free-fall acceleration "g" using the acoustical Doppler effect. The Doppler shift is a function of the speed of the source. Since a free-falling objects…

  2. Use Computer-Aided Tools to Parallelize Large CFD Applications

    Science.gov (United States)

    Jin, H.; Frumkin, M.; Yan, J.

    2000-01-01

    Porting applications to high performance parallel computers is always a challenging task. It is time consuming and costly. With rapid progressing in hardware architectures and increasing complexity of real applications in recent years, the problem becomes even more sever. Today, scalability and high performance are mostly involving handwritten parallel programs using message-passing libraries (e.g. MPI). However, this process is very difficult and often error-prone. The recent reemergence of shared memory parallel (SMP) architectures, such as the cache coherent Non-Uniform Memory Access (ccNUMA) architecture used in the SGI Origin 2000, show good prospects for scaling beyond hundreds of processors. Programming on an SMP is simplified by working in a globally accessible address space. The user can supply compiler directives, such as OpenMP, to parallelize the code. As an industry standard for portable implementation of parallel programs for SMPs, OpenMP is a set of compiler directives and callable runtime library routines that extend Fortran, C and C++ to express shared memory parallelism. It promises an incremental path for parallel conversion of existing software, as well as scalability and performance for a complete rewrite or an entirely new development. Perhaps the main disadvantage of programming with directives is that inserted directives may not necessarily enhance performance. In the worst cases, it can create erroneous results. While vendors have provided tools to perform error-checking and profiling, automation in directive insertion is very limited and often failed on large programs, primarily due to the lack of a thorough enough data dependence analysis. To overcome the deficiency, we have developed a toolkit, CAPO, to automatically insert OpenMP directives in Fortran programs and apply certain degrees of optimization. CAPO is aimed at taking advantage of detailed inter-procedural dependence analysis provided by CAPTools, developed by the University of

  3. Prosthetic rehabilitation with an implant-supported fixed prosthesis using computer-aided design and computer-aided manufacturing dental technology for a patient with a mandibulectomy: A clinical report.

    Science.gov (United States)

    Yoon, Hyung-In; Han, Jung-Suk

    2016-02-01

    The fabrication of dental prostheses with computer-aided design and computer-aided manufacturing shows acceptable marginal fits and favorable treatment outcomes. This clinical report describes the management of a patient who had undergone a mandibulectomy and received an implant-supported fixed prosthesis by using additive manufacturing for the framework and subtractive manufacturing for the monolithic zirconia restorations. PMID:26518985

  4. Second Asia-Pacific Conference on the Computer Aided System Engineering

    CERN Document Server

    Chaczko, Zenon; Jacak, Witold; Łuba, Tadeusz; Computational Intelligence and Efficiency in Engineering Systems

    2015-01-01

    This carefully edited and reviewed volume addresses the increasingly popular demand for seeking more clarity in the data that we are immersed in. It offers excellent examples of the intelligent ubiquitous computation, as well as recent advances in systems engineering and informatics. The content represents state-of-the-art foundations for researchers in the domain of modern computation, computer science, system engineering and networking, with many examples that are set in industrial application context. The book includes the carefully selected best contributions to APCASE 2014, the 2nd Asia-Pacific Conference on  Computer Aided System Engineering, held February 10-12, 2014 in South Kuta, Bali, Indonesia. The book consists of four main parts that cover data-oriented engineering science research in a wide range of applications: computational models and knowledge discovery; communications networks and cloud computing; computer-based systems; and data-oriented and software-intensive systems.

  5. Computer-aided detection of small pulmonary nodules in multidetector spiral computed tomography (MSCT) in children

    International Nuclear Information System (INIS)

    Purpose: Retrospective evaluation of computer-aided detection software (CAD) for automated detection (LungCAD, Siemens Medical solutions, Forchheim, Germany) and volumetry (LungCARE) of pulmonary nodules in dose-reduced pediatric MDCT. Materials and Methods: 30 scans of 24 children (10.4±5.9 years, 13 girls, 11 boys, 39.7±29.3 kg body weight) were performed on a 16-MDCT for tumor staging (n=18), inflammation (n=9), other indications (n=3). Tube voltage 120 kVp and effective mAs were adapted to body weight. Slice thickness 2 mm, increment 1 mm. A pediatric radiologist (U1), a CAD expert (U2) and an inexperienced radiologist (U3) independently analyzed the lung window images without and with the CAD as a second reader. In a consensus decision U1 and U2 were the reference standard. Results: Five examinations had to be excluded from the study due to other underlying lung disease. A total of 24 pulmonary nodules were found in all data sets with a minimal diameter of 0.35 mm to 3.81 mm (mean 1.7±0.85 mm). The sensitivities were as follows: U1 95.8% and 100% with CAD; U2 91.7% U3 66.7%. U2 and U3 did not detect further nodules with CAD. The sensitivity of CAD alone was 41.7% with 0.32 false-positive findings per examination. Interobserver agreement between U1/U2 regarding nodule detection with CAD was good (k=0.6500) and without CAD very good (k=0.8727). For the rest (U1/U3; U2/U3 with and without CAD), it was weak (k=0.0667-0.1884). Depending on the measured value (axial measurement, volume), there is a significant correlation (p=0.0026-0.0432) between nodule size and CAD detection. Undetected pulmonary nodules (mean 1.35 mm; range 0.35-2.61 mm) were smaller than the detected ones (mean 2.19 mm; range 1.35-3.81 mm). No significant correlation was found between CAD findings and patient age (p=0.9263) and body weight (p=0.9271) as well as nodule location (subpleural, intraparenchymal; p=1.0) and noise/SNR. (orig.)

  6. How a Computer-Training Chain Crashed in Plain Sight: Computer Learning Centers Qualified for Federal Student Aid Even as Bankruptcy Loomed.

    Science.gov (United States)

    Borrego, Anne Marie

    2001-01-01

    Explores how the for-profit, computer training chain Computer Learning Centers continued to operate, enrolling thousands of students and qualifying for millions of dollars in federal student aid, despite three years of legal and regulatory turmoil. (EV)

  7. Analysis of three-phase power-supply systems using computer-aided design programs

    International Nuclear Information System (INIS)

    A major concern of every designer of large, three-phase power-supply systems is the protection of system components from overvoltage transients. At present, three computer-aided circuit design programs are available in the Magnetic Fusion Energy (MFE) National Computer Center that can be used to analyze three-phase power systems: MINI SCEPTRE, SPICE I, and SPICE II. These programs have been used at Lawrence Livermore Laboratory (LLL) to analyze the operation of a 200-kV dc, 20-A acceleration power supply for the High Voltage Test Stand. Various overvoltage conditions are simulated and the effectiveness of system protective devices is observed. The simulated overvoltage conditions include such things as circuit breaker openings, pulsed loading, and commutation voltage surges in the rectifiers. These examples are used to illustrate the use of the computer-aided, circuit-design programs discussed in this paper

  8. Computer-Aided Nodule Assessment and Risk Yield Risk Management of Adenocarcinoma: The Future of Imaging?

    Science.gov (United States)

    Foley, Finbar; Rajagopalan, Srinivasan; Raghunath, Sushravya M; Boland, Jennifer M; Karwoski, Ronald A; Maldonado, Fabien; Bartholmai, Brian J; Peikert, Tobias

    2016-01-01

    Increased clinical use of chest high-resolution computed tomography results in increased identification of lung adenocarcinomas and persistent subsolid opacities. However, these lesions range from very indolent to extremely aggressive tumors. Clinically relevant diagnostic tools to noninvasively risk stratify and guide individualized management of these lesions are lacking. Research efforts investigating semiquantitative measures to decrease interrater and intrarater variability are emerging, and in some cases steps have been taken to automate this process. However, many such methods currently are still suboptimal, require validation and are not yet clinically applicable. The computer-aided nodule assessment and risk yield software application represents a validated tool for the automated, quantitative, and noninvasive tool for risk stratification of adenocarcinoma lung nodules. Computer-aided nodule assessment and risk yield correlates well with consensus histology and postsurgical patient outcomes, and therefore may help to guide individualized patient management, for example, in identification of nodules amenable to radiological surveillance, or in need of adjunctive therapy. PMID:27568149

  9. Modeling And Simulation Of Bar Code Scanners Using Computer Aided Design Software

    Science.gov (United States)

    Hellekson, Ron; Campbell, Scott

    1988-06-01

    Many optical systems have demanding requirements to package the system in a small 3 dimensional space. The use of computer graphic tools can be a tremendous aid to the designer in analyzing the optical problems created by smaller and less costly systems. The Spectra Physics grocery store bar code scanner employs an especially complex 3 dimensional scan pattern to read bar code labels. By using a specially written program which interfaces with a computer aided design system, we have simulated many of the functions of this complex optical system. In this paper we will illustrate how a recent version of the scanner has been designed. We will discuss the use of computer graphics in the design process including interactive tweaking of the scan pattern, analysis of collected light, analysis of the scan pattern density, and analysis of the manufacturing tolerances used to build the scanner.

  10. Computer-aided Nonlinear Control System Design Using Describing Function Models

    CERN Document Server

    Nassirharand, Amir

    2012-01-01

    A systematic computer-aided approach provides a versatile setting for the control engineer to overcome the complications of controller design for highly nonlinear systems. Computer-aided Nonlinear Control System Design provides such an approach based on the use of describing functions. The text deals with a large class of nonlinear systems without restrictions on the system order, the number of inputs and/or outputs or the number, type or arrangement of nonlinear terms. The strongly software-oriented methods detailed facilitate fulfillment of tight performance requirements and help the designer to think in purely nonlinear terms, avoiding the expedient of linearization which can impose substantial and unrealistic model limitations and drive up the cost of the final product. Design procedures are presented in a step-by-step algorithmic format each step being a functional unit with outputs that drive the other steps. This procedure may be easily implemented on a digital computer with example problems from mecha...

  11. On the convergence of nanotechnology and Big Data analysis for computer-aided diagnosis.

    Science.gov (United States)

    Rodrigues, Jose F; Paulovich, Fernando V; de Oliveira, Maria Cf; de Oliveira, Osvaldo N

    2016-04-01

    An overview is provided of the challenges involved in building computer-aided diagnosis systems capable of precise medical diagnostics based on integration and interpretation of data from different sources and formats. The availability of massive amounts of data and computational methods associated with the Big Data paradigm has brought hope that such systems may soon be available in routine clinical practices, which is not the case today. We focus on visual and machine learning analysis of medical data acquired with varied nanotech-based techniques and on methods for Big Data infrastructure. Because diagnosis is essentially a classification task, we address the machine learning techniques with supervised and unsupervised classification, making a critical assessment of the progress already made in the medical field and the prospects for the near future. We also advocate that successful computer-aided diagnosis requires a merge of methods and concepts from nanotechnology and Big Data analysis. PMID:26979668

  12. Medical image computing and computer-aided medical interventions applied to soft tissues. Work in progress in urology

    CERN Document Server

    Troccaz, Jocelyne; Berkelman, Peter; Cinquin, Philippe; Daanen, Vincent; Leroy, Antoine; Marchal, Maud; Payan, Yohan; Promayon, Emmanuel; Voros, Sandrine; Bart, Stéphane; Bolla, Michel; Chartier-Kastler, Emmanuel; Descotes, Jean-Luc; Dusserre, Andrée; Giraud, Jean-Yves; Long, Jean-Alexandre; Moalic, Ronan; Mozer, Pierre

    2006-01-01

    Until recently, Computer-Aided Medical Interventions (CAMI) and Medical Robotics have focused on rigid and non deformable anatomical structures. Nowadays, special attention is paid to soft tissues, raising complex issues due to their mobility and deformation. Mini-invasive digestive surgery was probably one of the first fields where soft tissues were handled through the development of simulators, tracking of anatomical structures and specific assistance robots. However, other clinical domains, for instance urology, are concerned. Indeed, laparoscopic surgery, new tumour destruction techniques (e.g. HIFU, radiofrequency, or cryoablation), increasingly early detection of cancer, and use of interventional and diagnostic imaging modalities, recently opened new challenges to the urologist and scientists involved in CAMI. This resulted in the last five years in a very significant increase of research and developments of computer-aided urology systems. In this paper, we propose a description of the main problems rel...

  13. Computer-Aided psychotherapy for anxiety disorders: A meta-analytic review

    OpenAIRE

    Cuijpers, P.; Marks, I. M.; Straten, van, M.; K. Cavanagh; Gega, L.; Andersson, G

    2009-01-01

    Computer-aided psychotherapy (CP) is said to (1) be as effective as face-to-face psychotherapy, while requiring less therapist time, for anxiety disorder sufferers, (2) speed access to care, and (3) save traveling time. CP may be delivered on stand-alone or Internet-linked computers, palmtop computers, phone-interactive voice response, DVDs, and cell phones. The authors performed a meta-analysis of 23 randomised controlled studies (RCTs) that compared CP with non-CP in anxiety disorders: phob...

  14. Medical image computing and computer-aided medical interventions applied to soft tissues. Work in progress in urology

    OpenAIRE

    Troccaz, Jocelyne; Baumann, Michael; Berkelman, Peter; Cinquin, Philippe; Daanen, Vincent; Leroy, Antoine; Marchal, Maud; Payan, Yohan; Promayon, Emmanuel; Voros, Sandrine; Bart, Stéphane; Bolla, Michel; Chartier-Kastler, Emmanuel; Descotes, Jean-Luc; Dusserre, Andrée

    2006-01-01

    International audience Until recently, Computer-Aided Medical Interventions (CAMI) and Medical Robotics have focused on rigid and non deformable anatomical structures. Nowadays, special attention is paid to soft tissues, raising complex issues due to their mobility and deformation. Mini-invasive digestive surgery was probably one of the first fields where soft tissues were handled through the development of simulators, tracking of anatomical structures and specific assistance robots. Howev...

  15. Unit cell-based computer-aided manufacturing system for tissue engineering

    International Nuclear Information System (INIS)

    Scaffolds play an important role in the regeneration of artificial tissues or organs. A scaffold is a porous structure with a micro-scale inner architecture in the range of several to several hundreds of micrometers. Therefore, computer-aided construction of scaffolds should provide sophisticated functionality for porous structure design and a tool path generation strategy that can achieve micro-scale architecture. In this study, a new unit cell-based computer-aided manufacturing (CAM) system was developed for the automated design and fabrication of a porous structure with micro-scale inner architecture that can be applied to composite tissue regeneration. The CAM system was developed by first defining a data structure for the computing process of a unit cell representing a single pore structure. Next, an algorithm and software were developed and applied to construct porous structures with a single or multiple pore design using solid freeform fabrication technology and a 3D tooth/spine computer-aided design model. We showed that this system is quite feasible for the design and fabrication of a scaffold for tissue engineering. (paper)

  16. Thermal radiation view factor: Methods, accuracy and computer-aided procedures

    Science.gov (United States)

    Kadaba, P. V.

    1982-01-01

    The computer aided thermal analysis programs which predicts the result of predetermined acceptable temperature range prior to stationing of these orbiting equipment in various attitudes with respect to the Sun and the Earth was examined. Complexity of the surface geometries suggests the use of numerical schemes for the determination of these viewfactors. Basic definitions and standard methods which form the basis for various digital computer methods and various numerical methods are presented. The physical model and the mathematical methods on which a number of available programs are built are summarized. The strength and the weaknesses of the methods employed, the accuracy of the calculations and the time required for computations are evaluated. The situations where accuracies are important for energy calculations are identified and methods to save computational times are proposed. Guide to best use of the available programs at several centers and the future choices for efficient use of digital computers are included in the recommendations.

  17. Computer Aided Measurement Laser (CAML): technique to quantify post-mastectomy lymphoedema

    Science.gov (United States)

    Trombetta, Chiara; Abundo, Paolo; Felici, Antonella; Ljoka, Concetta; Di Cori, Sandro; Rosato, Nicola; Foti, Calogero

    2012-10-01

    Lymphoedema can be a side effect of cancer treatment. Eventhough several methods for assessing lymphoedema are used in clinical practice, an objective quantification of lymphoedema has been problematic. The aim of the study was to determine the objectivity, reliability and repeatability of the computer aided measurement laser (CAML) technique. CAML technique is based on computer aided design (CAD) methods and requires an infrared laser scanner. Measurements are scanned and the information describing size and shape of the limb allows to design the model by using the CAD software. The objectivity and repeatability was established in the beginning using a phantom. Consequently a group of subjects presenting post-breast cancer lymphoedema was evaluated using as a control the contralateral limb. Results confirmed that in clinical settings CAML technique is easy to perform, rapid and provides meaningful data for assessing lymphoedema. Future research will include a comparison of upper limb CAML technique between healthy subjects and patients with known lymphoedema.

  18. Model-based computer-aided design for controlled release of pesticides

    DEFF Research Database (Denmark)

    Muro Sunè, Nuria; Gani, Rafiqul; Bell, G.; Shirley, I.

    2005-01-01

    , can be used to study and analyze some of the important issues related to the design/application of the pesticide. This paper highlights the needs for predictive models and proposes the use of a computer aided modelling framework through which a collection of reliable and predictive constitutive...... extended models have been developed and implemented into a computer-aided system. The total model consisting of the property models embedded into the release models are then employed to study the release of different combinations of AIs and polymer-based microcapsules.......In the field of controlled release technology for pesticides or active ingredients (AI), models that can predict its delivery during application are important for purposes of design and marketing of the pesticide product. Appropriate models for the controlled release of pesticides, if available...

  19. Computer Aided Design and Analysis of Separation Processes with Electrolyte Systems

    DEFF Research Database (Denmark)

    Takano, Kiyoteru; Gani, Rafiqul; Kolar, P.; Ishikawa, T.

    A methodology for computer aided design and analysis of separation processes involving electrolyte systems is presented. The methodology consists of three main parts. The thermodynamic part 'creates' the problem specific property model package, which is a collection of pure component and mixture...... process alternatives. For the simulation part, a general multi-purpose, multi-phase separation model has been developed and integrated to an existing computer aided system. Application of the design and analysis methodology is highlighted through two illustrative case studies, (C) 2000 Elsevier Science...... property models. The design and analysis part generates process (flowsheet) alternatives, evaluates/analyses feasibility of separation and provides a visual operation path for the desired separation. The simulation part consists of a simulation/calculation engine that allows the screening and validation of...

  20. Computer Aided Measurement Laser (CAML): technique to quantify post-mastectomy lymphoedema

    International Nuclear Information System (INIS)

    Lymphoedema can be a side effect of cancer treatment. Eventhough several methods for assessing lymphoedema are used in clinical practice, an objective quantification of lymphoedema has been problematic. The aim of the study was to determine the objectivity, reliability and repeatability of the computer aided measurement laser (CAML) technique. CAML technique is based on computer aided design (CAD) methods and requires an infrared laser scanner. Measurements are scanned and the information describing size and shape of the limb allows to design the model by using the CAD software. The objectivity and repeatability was established in the beginning using a phantom. Consequently a group of subjects presenting post-breast cancer lymphoedema was evaluated using as a control the contralateral limb. Results confirmed that in clinical settings CAML technique is easy to perform, rapid and provides meaningful data for assessing lymphoedema. Future research will include a comparison of upper limb CAML technique between healthy subjects and patients with known lymphoedema.

  1. Computer aided virtual manufacturing using Creo parametric easy to learn step by step guide

    CERN Document Server

    Kanife, Paul Obiora

    2016-01-01

    Providing a step-by-step guide for the implementation of virtual manufacturing using Creo Parametric software (formerly known as Pro-Engineer), this book creates an engaging and interactive learning experience for manufacturing engineering students. Featuring graphic illustrations of simulation processes and operations, and written in accessible English to promote user-friendliness, the book covers key topics in the field including: the engraving machining process, face milling, profile milling, surface milling, volume rough milling, expert machining, electric discharge machining (EDM), and area turning using the lathe machining process. Maximising reader insights into how to simulate material removal processes, and how to generate cutter location data and G-codes data, this valuable resource equips undergraduate, postgraduate, BTech and HND students in the fields of manufacturing engineering, computer aided design (CAD) and computer aided engineering (CAE) with transferable skills and knowledge. This book is...

  2. Computer-Aided Design Method of Warp-Knitted Jacquard Spacer Fabrics

    Directory of Open Access Journals (Sweden)

    Li Xinxin

    2016-06-01

    Full Text Available Based on a further study on knitting and jacquard principles, this paper presents a mathematical design model to make computer-aided design of warp-knitted jacquard spacer fabrics more efficient. The mathematical model with matrix method employs three essential elements of chain notation, threading and Jacquard designing. With this model, the processing to design warp-knitted jacquard spacer fabrics with CAD software is also introduced. In this study, the sports shoes which have separated functional areas according to the feet structure and characteristics of movement are analysed. The results show the different patterns on Jacquard spacer fabrics that are seamlessly stitched with jacquard technics. The computer-aided design method of warp-knitted jacquard spacer fabrics is efficient and simple.

  3. COMPUTER-AIDED BLOCK ASSEMBLY PROCESS PLANNING IN SHIPBUILD-ING BASED ON RULE-REASONING

    Institute of Scientific and Technical Information of China (English)

    ZHANG Zhiying; LI Zhen; JIANG Zhibin

    2008-01-01

    Computer-aided block assembly process planning based on rule-reasoning are developed in order to improve the assembly efficiency and implement the automated block assembly process planning generation in shipbuilding. First, weighted directed liaison graph (WDLG) is proposed to represent the model of block assembly process according to the characteristics of assembly relation, and edge list (EL) is used to describe assembly sequences. Shapes and assembly attributes of block parts are analyzed to determine the assembly position and matched parts of parts used frequently. Then, a series of assembly rules are generalized, and assembly sequences for block are obtained by means of rule reasoning. Final, a prototype system of computer-aided block assembly process planning is built. The system has been tested on actual block, and the results were found to be quite efficiency. Meanwhile, the fundament for the automation of block assembly process generation and integration with other systems is established.

  4. A Computer-Aided FPS-Oriented Approach for Construction Briefing

    Institute of Scientific and Technical Information of China (English)

    Xiaochun Luo; Qiping Shen

    2008-01-01

    Function performance specification (FPS) is one of the value management (VM) techniques de- veloped for the explicit statement of optimum product definition. This technique is widely used in software engineering and manufacturing industry, and proved to be successful to perform product defining tasks. This paper describes an FPS-odented approach for construction briefing, which is critical to the successful deliv- ery of construction projects. Three techniques, i.e., function analysis system technique, shared space, and computer-aided toolkit, are incorporated into the proposed approach. A computer-aided toolkit is developed to facilitate the implementation of FPS in the briefing processes. This approach can facilitate systematic, ef- ficient identification, clarification, and representation of client requirements in trail running. The limitations of the approach and future research work are also discussed at the end of the paper.

  5. Computer Aided Design and Analysis of Separation Processes with Electrolyte Systems

    DEFF Research Database (Denmark)

    A methodology for computer aided design and analysis of separation processes involving electrolyte systems is presented. The methodology consists of three main parts. The thermodynamic part "creates" the problem specific property model package, which is a collection of pure component and mixture...... property models. The design and analysis part generates process (flowsheet) alternatives, evaluates/analyses feasibility of separation and provides a visual operation path for the desired separation. The simulation part consists of a simulation/calculation engine that allows the screening and validation of...... process alternatives. For the simulation part, a general multi-purpose, multi-phase separation model has been developed and integrated to an existing computer aided system. Application of the design and analysis methodology is highlighted through two illustrative case studies....

  6. Computer Aided Design and Analysis of Separation Processes with Electrolyte Systems

    DEFF Research Database (Denmark)

    Takano, Kiyoteru; Gani, Rafiqul; Kolar, P.;

    2000-01-01

    A methodology for computer aided design and analysis of separation processes involving electrolyte systems is presented. The methodology consists of three main parts. The thermodynamic part 'creates' the problem specific property model package, which is a collection of pure component and mixture...... property models. The design and analysis part generates process (flowsheet) alternatives, evaluates/analyses feasibility of separation and provides a visual operation path for the desired separation. The simulation part consists of a simulation/calculation engine that allows the screening and validation of...... process alternatives. For the simulation part, a general multi-purpose, multi-phase separation model has been developed and integrated to an existing computer aided system. Application of the design and analysis methodology is highlighted through two illustrative case studies, (C) 2000 Elsevier Science...

  7. Computer-aided analysis and design of the shape rolling process for producing turbine engine airfoils

    Science.gov (United States)

    Lahoti, G. D.; Akgerman, N.; Altan, T.

    1978-01-01

    Mild steel (AISI 1018) was selected as model cold rolling material and Ti-6A1-4V and Inconel 718 were selected as typical hot rolling and cold rolling alloys, respectively. The flow stress and workability of these alloys were characterized and friction factor at the roll/workpiece interface was determined at their respective working conditions by conducting ring tests. Computer-aided mathematical models for predicting metal flow and stresses, and for simulating the shape rolling process were developed. These models utilized the upper bound and the slab methods of analysis, and were capable of predicting the lateral spread, roll separating force, roll torque, and local stresses, strains and strain rates. This computer-aided design system was also capable of simulating the actual rolling process, and thereby designing the roll pass schedule in rolling of an airfoil or a similar shape.

  8. Trends in Computer-Aided Manufacturing in Prosthodontics: A Review of the Available Streams

    Directory of Open Access Journals (Sweden)

    Jaafar Abduo

    2014-01-01

    Full Text Available In prosthodontics, conventional methods of fabrication of oral and facial prostheses have been considered the gold standard for many years. The development of computer-aided manufacturing and the medical application of this industrial technology have provided an alternative way of fabricating oral and facial prostheses. This narrative review aims to evaluate the different streams of computer-aided manufacturing in prosthodontics. To date, there are two streams: the subtractive and the additive approaches. The differences reside in the processing protocols, materials used, and their respective accuracy. In general, there is a tendency for the subtractive method to provide more homogeneous objects with acceptable accuracy that may be more suitable for the production of intraoral prostheses where high occlusal forces are anticipated. Additive manufacturing methods have the ability to produce large workpieces with significant surface variation and competitive accuracy. Such advantages make them ideal for the fabrication of facial prostheses.

  9. Design of tailor-made chemical blend using a decomposition-based computer-aided approach

    DEFF Research Database (Denmark)

    Yunus, Nor Alafiza; Gernaey, Krist; Manan, Z.A.; Woodley, John; Gani, Rafiqul

    2011-01-01

    Computer aided techniques form an efficient approach to solve chemical product design problems such as the design of blended liquid products (chemical blending). In chemical blending, one tries to find the best candidate, which satisfies the product targets defined in terms of desired product...... attributes (properties).The systematic computer-aided technique first establishes the search space, and then narrows it down in subsequent steps until a small number of feasible and promising candidates remain. At this point, experimental work may be conducted to verify if any or all the candidates satisfy...... the desired product attributes. Alternatively, rigorous modeling could also be used in this final step. In other words, the candidates are quickly generated and screened until a small number is left for final selection and evaluation by experiments and/or rigorous modeling. This paper presents a...

  10. User interface and database design for software database of the Computer Aided Prototyping System (CAPS)

    OpenAIRE

    Hong, Ruey-Wen

    1996-01-01

    CAPS (Computer Aided Prototyping System) is an integrated set of software tools that generate prototypes directly from real time requirements. The success of CAPS depends on being able to generate the prototype quickly so that it can be evaluated, leading to the construction of a program built on true requirements thereby resulting in a better software product. The key to developing prototypes quickly is having a significant software base to choose reusable components from. The problem with t...

  11. Computer-aided analytical control of diamond and cubic boron nitride grits

    International Nuclear Information System (INIS)

    Methodical and information aspects of the superhard materials powder uniformity as a characteristics of the powder quality are discussed. Computer-aided analytical methods of the rapid diagnostics of the sieve granulometric composition and the external specific surface of diamond and cubic boron nitride grits are described. The results of the application of the developed methods and software to standard powders of synthetic diamond and cubic boron nitride are given

  12. Study on Computer-Aided Design Support of Traditional Architectural Theories

    OpenAIRE

    Choo, Seung Yeon

    2007-01-01

    The research presented in this thesis describes a computer-aided design support of traditional architectural theories. Traditional architectural theories in western architecture have been considered as a basis for answering the fundamental questions of architecture: proportion, symmetry, colour, harmony and so on. In particular, the aesthetic aspect of these theories has been one of many important architectural aspects, and which is concerned with the field of architecture in determining the ...

  13. Sensory-guided CATROB [Computer Aided Telemanipulation with Robots] speeds up remote maintenance

    International Nuclear Information System (INIS)

    In the new Computer Aided Telemanipulation with Robots (CATROB) system, developed by Kernforschungszentrum Karlsruhe, automatic sensory-guided operations are combined with operator-controlled manual operations to reduce time spent on remote maintenance and inspection. The system achieves a high level of automation by using intelligent control strategies based on CAD models of the environment and on the information provided by various sensors. If manual remote handling is unavoidable, the operator is supported by a graphics based simulation system. (author)

  14. Computer-aided detection in breast MRI: a systematic review and meta-analysis

    OpenAIRE

    Dorrius, Monique D.; der Weide, Marijke C. Jansen-van; van Ooijen, Peter M. A.; Pijnappel, Ruud M.; Oudkerk, Matthijs

    2011-01-01

    Objectives To evaluate the additional value of computer-aided detection (CAD) in breast MRI by assessing radiologists’ accuracy in discriminating benign from malignant breast lesions. Methods A literature search was performed with inclusion of relevant studies using a commercially available CAD system with automatic colour mapping. Two independent researchers assessed the quality of the studies. The accuracy of the radiologists’ performance with and without CAD was presented as pooled sensiti...

  15. On the variety of planar spirals and their applications in computer aided design

    OpenAIRE

    Kenjiro T. Miura; Rushan Ziatdinov

    2013-01-01

    In this paper we discuss the variety of planar spiral segments and their applications in objects in both the real and artificial world. The discussed curves with monotonic curvature function are well-known in geometric modelling and computer aided geometric design as fair curves, and they are very significant in aesthetic shape modelling. Fair curve segments are used for two-point G1 and G2 Hermite interpolation, as well as for generating aesthetic splines.

  16. Computer aided design environment for the analysis and design of multi-body flexible structures

    Science.gov (United States)

    Ramakrishnan, Jayant V.; Singh, Ramen P.

    1989-01-01

    A computer aided design environment consisting of the programs NASTRAN, TREETOPS and MATLAB is presented in this paper. With links for data transfer between these programs, the integrated design of multi-body flexible structures is significantly enhanced. The CAD environment is used to model the Space Shuttle/Pinhole Occulater Facility. Then a controller is designed and evaluated in the nonlinear time history sense. Recent enhancements and ongoing research to add more capabilities are also described.

  17. Case Based Reasoning Intelligent System for Network Computer Aided Process Planning

    Institute of Scientific and Technical Information of China (English)

    ZHAO Chunhua; WU Zhengjia; ZHOU Chengjun; ZHU Dalin; LI Haoping

    2006-01-01

    Computer aided process planning system played a key role for integrating design and manufacturing or assembly systems properly considering available resources and design constraints. To take advantage of the enterprise resource, the web CAPP framework was established. Case based reasoning and multi agent system were integrated in the system. The multi agent mechanism was discussed in the paper. And an instance of case base was introduced. They made the system run independently and continuously in the network environment of process planning problems.

  18. Computer Aided ECG Analysis - State of the Art and Upcoming Challenges

    OpenAIRE

    Velic, Marko; Padavic, Ivan; Car, Sinisa

    2013-01-01

    In this paper we present current achievements in computer aided ECG analysis and their applicability in real world medical diagnosis process. Most of the current work is covering problems of removing noise, detecting heartbeats and rhythm-based analysis. There are some advancements in particular ECG segments detection and beat classifications but with limited evaluations and without clinical approvals. This paper presents state of the art advancements in those areas till present day. Besides ...

  19. Computer-aided-engineering system for modeling and analysis of ECLSS integration testing

    Science.gov (United States)

    Sepahban, Sonbol

    1987-01-01

    The accurate modeling and analysis of two-phase fluid networks found in environmental control and life support systems is presently undertaken by computer-aided engineering (CAE) techniques whose generalized fluid dynamics package can solve arbitrary flow networks. The CAE system for integrated test bed modeling and analysis will also furnish interfaces and subsystem/test-article mathematical models. Three-dimensional diagrams of the test bed are generated by the system after performing the requisite simulation and analysis.

  20. Computed tomography in diagnosis of lung pneumocystosis in hiv-infected and aids patients

    International Nuclear Information System (INIS)

    The article deals with the issue concerning epidemiology of pneumocystosis, clinical and radiological features of changes in the lungs in treatment of opportunistic infections. Indications for the use of computed tomography in HIV-infected and AIDS patients, radiation CT semiotics of changes in lung pneumocystosis, the possibility of establishing of exacted diagnosis in pneumocysosis of the lungs when using CT, differential diagnosis issues have been considered in the paper

  1. Computer aided screening and evaluation of herbal therapeutics against MRSA infections

    OpenAIRE

    Skariyachan, Sinosh; Krishnan, Rao Shruti; Siddapa, Snehapriya Bangalore; Salian, Chithra; Bora, Prerana; Sebastian, Denoj

    2011-01-01

    Methicillin resistant Staphylococcus aureus (MRSA), a pathogenic bacterium that causes life threatening outbreaks such as community-onset and nosocomial infections has emerged as ‘superbug’. The organism developed resistance to all classes of antibiotics including the best known Vancomycin (VRSA). Hence, there is a need to develop new therapeutic agents. This study mainly evaluates the potential use of botanicals against MRSA infections. Computer aided design is an initial platform to screen ...

  2. Computer aided system for selection of parameters for making metallographic microsections

    OpenAIRE

    L.A. Dobrzański; M. Gumińska

    2007-01-01

    Purpose: The goal of this work was development of the computer aided system for selection of technological parameters for making the metallographic microsections for the microscopic examinations.Design/methodology/approach: Prolog language – the Artificial Intelligence tool was employed in the project, and the Logic Programming Associate’s VisiRule system, which was used for saving the knowledge base - rules pertaining the objects and their relationships. These tools were used to develop the ...

  3. Basic Principles of Industrial Electric Power Network Computer Aided Design and Engineering

    Directory of Open Access Journals (Sweden)

    M. Fursanov

    2012-01-01

    Full Text Available A conceptual model for a computer aided design and engineering system has been developed in the paper. The paper presents basic automation process principles including a graphical representation   network and calculation results, convenient user interface, automatic mode calculation, selection of transformer rated power and cross-section area of wires. The developed algorithm and program make it possible to save time and improve quality of project implementation.

  4. Selection of variables using 'independence Bayes' in computer-aided diagnosis of upper gastrointestinal bleeding

    OpenAIRE

    Ohmann, C; Künneke, M.; Zaczyk, R.; Thon, K.; Lorenz, Wilfried

    1986-01-01

    In this paper two problems of computer-aided diagnosis with 'independence Bayes' were investigated: selection of variables and monotonicity in performance as the number of measurements is increased. Using prospective data from patients with upper gastrointestinal bleeding, the stepwise forward selection approach maximizing the apparent diagnostic accuracy was analysed with respect to different kinds of bias in estimation of the true diagnostic accuracy and to the stability of the number and t...

  5. Adaptation of Work Places and Homes for the Disabled Using Computer-aided Design

    OpenAIRE

    Johansson, Gerd; Eriksson, Joakim

    1994-01-01

    When adapting environments for the physically disabled, it is important to encourage and activate not only the person concerned, but also other people involved or affected. A computer aided planning tool has been developed to support the participation of all persons involved, as well as supporting the planner’s (e.g. an occupational therapist) design of the environment. The prototype development and evaluation were based on 6 case-studies, which also provided experience of the needs and requi...

  6. COMPUTER-AIDED DECISION SYSTEM FOR REFRACTIVE SURGERIES WITH EXCIMER LASER

    OpenAIRE

    Rawan Baroudy; Bassam Lala

    2014-01-01

    124 patients (248 eyes) who intended to refractive surgery by Excimer laser were studied to implement our goal of this study which is design and operate a computer-aided decision system for optimal choosing the best refractive surgery based on patient needs, Starting from corneal topography and aberration images, using RGB and HSI color spaces and decision tree. The system also can calculate percent of vision correction, ablation and residual stroma with high precision. This highly important ...

  7. Computational Fluid Dynamics Aided Design of Stirred Liquid-Liquid Extraction Columns

    OpenAIRE

    Hlawitschka, Mark

    2013-01-01

    Aim of this work was the extension and development of a coupled Computational Fluid Dynamics (CFD) and population balance model (PBM) solver to enable a simulation aided design of stirred liquid-liquid extraction columns. The principle idea is to develop a new design methodology based on a CFD-PBM approach and verify it with existing data and correlations. On this basis, the separation performance in any apparatus geometry should be possible to predict without any experimental input. Reliable...

  8. pOM: Linking Pen Gestures to Computer-Aided Composition Processes

    OpenAIRE

    Garcia, Jérémie; Leroux, Philippe; Bresson, Jean

    2014-01-01

    International audience Illuminated manuscripts of medieval music contain rich decorations in addition to handwritten neumatic notation. Our project with composer Philippe Leroux investigates the use of such handwritten symbols during the composition of his piece Quid sit musicus. We introduce pOM, an interactive paper application and a library for the OpenMusic computer-aided composition environment which links pen gestures over an old manuscript to compositional processes. The paper inter...

  9. Internet-based computer-aided learning for artificial neural networks

    OpenAIRE

    Keeling, Paul J

    1998-01-01

    This thesis presents research performed to mvestigate the potential offered by the Internet for the implementation of an Engineering Computer-Aided Learning (CAL) environment. The research comprises two categories, a detailed literature survey of CAL and its application through the medium of the Internet environment. As a direct result of the literature survey, the scope of CAL can be considered to comprise the use of text, graphics, animations and sound. It is through the use of the CAL ...

  10. Computer-aided design of repairs of buildings and the engineering infrastructure

    OpenAIRE

    Volkov Andrey Anatolevich; Yarulin Rustam Nazipovich

    2012-01-01

    The authors argue that the design development procedure and the technology-based preparation for the renovation of buildings and the engineering infrastructure are to be considered as a comprehensive process to be automated. One of the main problems that accompany the process of budgeting and scheduling of renovation projects consists in incidental expenses for extra repairs, as they are difficult to project. The authors suggest developing a specialized computer aided design sy...

  11. The Computer-Aided Diagnosis of Different Histological Types of Primary Bronchogenic Carcinoma from Radiologic Signs

    OpenAIRE

    Qin, Dulie; Lie, Tieyi; Fan, Lianchun; Ji, Jingling; Chen, Jingcheng; Chen, Binlan; Huang, Shoufang; Bai, Yiqiu; Liu, Keqin; Lu, Daolie; Zhang, Gui; Li, Junheng; Ma, Jie; Wang, Yaowen; Zhao, Lijuan

    1982-01-01

    On the basis of examining a number of resected specimens the gross types of the primary lung cancer were stated and the relationship between histologic types and gross types was studied. Futhermore the comparative study among X-ray films, resected specimens of tumor and pathologic examinations upon cases was made and some radiographic signs were extracted. After determining the gross types by radiologists using the sequential Bayes' model the computer-aided diagnosis was made. The accuracy of...

  12. Implementation Methods of Computer Aided Design-Drawing and Drawing Management for Plate Cutting-Machine

    Institute of Scientific and Technical Information of China (English)

    DONG Yu-de; ZHAO Han; TAN Jian-rong

    2002-01-01

    The implementation methods of computer aided design,drawing and drawing management for plate cuttingmachine are discussed. The system structure for plate cutting- machine design is put forward firstly, then some key technologies and their implementation methods are introduced, which include the structure management of graphics, the unification of graph and design calculation, information share of part, assemble and drawing management system, and movement simulation of key components.

  13. Analysis of Computer-Aided and Artificial Intelligence Technologies and Solutions in Service Industries in Russia

    OpenAIRE

    Rezanov, Vladislav

    2013-01-01

    The primary objective of this research study was to investigate the relationship between Computer-Aided and Artificial Intelligence Technologies and customer satisfaction in the context of businesses in Russia. The research focuses on methods of Artificial Intelligence technology application in business and its effect on customer satisfaction. The researcher introduces Artificial Intelligence and studies the forecasting approaches in relation to business operations. The rese...

  14. Development and evaluation of computer-aided assessment in discrete and decision mathematics

    OpenAIRE

    Zaczek, Kinga

    2015-01-01

    This thesis was submitted for the degree of Doctor of Philosophy and was awarded by Brunel University London. This thesis describes the development of Computer-Aided Assessment questions for elementary discrete and decision mathematics at the school/university interface, stressing the pedagogy behind the questions’ design and the development of methodology for assessing their efficacy in improving students’ engagement and perceptions, as well as on their exams results. The questions give i...

  15. Development of a computer-aided diagnostic system for Alzheimer's disease using magnetic resonance imaging

    OpenAIRE

    Murase, Kenya; Gondo, Naohiko; Soma, Tsutomu

    2016-01-01

    Alzheimer's disease (AD) is the most common type of dementia accompanied with brain atrophy. Structural measurements of brain atrophy in specific brain structures such as hippocampus using magnetic resonance imaging (MRI) have been reported to detect the development of dementia early in the course of the disease. The purpose of this study was to develop a computer-aided diagnostic system for AD using MRI, which is based on the automatic volumetry of segmented brain images and generation of th...

  16. Using a smart phone for information rendering in Computer-Aided Surgery

    OpenAIRE

    Gael, Le Bellego; Bucki, Marek; Bricault, Ivan; Troccaz, Jocelyne

    2011-01-01

    Computer-aided surgery intensively uses the concept of navigation: after having collected CT data from a patient and transferred them to the operating room coordinate system, the surgical instrument (a puncture needle for instance) is localized and its position is visualized with respect to the patient organs which are not directly visible. This approach is very similar to the GPS paradigm. Traditionally, three orthogonal slices in the patient data are presented on a distant screen. Sometimes...

  17. Re-engineering software for integration using computer aided software engineering

    OpenAIRE

    Le Gal, Thierry

    1992-01-01

    This research addresses the problem of integrating software at a high level of integration (analysis or design level) using Computer Aided Software Engineering. The assumption is made that the source code of the two applications to be integrated is available in language C or FORTRAN 77. Following the research done by Sandra Pennington (Penn91) and Michele Grieshaber (Grie91) on this subject, a new analysis has been led. Sandra Pennington (Penn91) conceived and proposed an "Inte...

  18. A COMPUTER-AIDED UNIFIED APPROACH TO MODELING PWM AND RESONANT CONVERTERS

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    This letter puts forward a method of modeling for the steady-state and small signal dynamic analysis on PWM, quasi-resonant and series/(parallel) resonant switching converters based on pulse-waveform integral approach. As an example, PWM and quasi-resonant converters are used to discuss the principle of the approach. The results are compared with those in the relative literatures. Computer aided analysis are made to confirm the correctness.

  19. Towards prevention and early diagnosis of skin cancer: computer-aided analysis of dermoscopy images

    OpenAIRE

    Sadeghi*, Maryam

    2012-01-01

    Melanoma, the deadliest form of skin cancer, must be diagnosed early for effective treatment. Irregular pigment network and streaks are important clues for melanoma diagnosis using dermoscopy images. This thesis describes novel image processing approaches for computer-aided pigment network and streaks detection on dermoscopy images. Our methods provide meaningful visualization of these structures, and extract features for irregularity detection. Additionally we present our efforts towards pre...

  20. Computer aided reliability, availability, and safety modeling for fault-tolerant computer systems with commentary on the HARP program

    Science.gov (United States)

    Shooman, Martin L.

    1991-01-01

    Many of the most challenging reliability problems of our present decade involve complex distributed systems such as interconnected telephone switching computers, air traffic control centers, aircraft and space vehicles, and local area and wide area computer networks. In addition to the challenge of complexity, modern fault-tolerant computer systems require very high levels of reliability, e.g., avionic computers with MTTF goals of one billion hours. Most analysts find that it is too difficult to model such complex systems without computer aided design programs. In response to this need, NASA has developed a suite of computer aided reliability modeling programs beginning with CARE 3 and including a group of new programs such as: HARP, HARP-PC, Reliability Analysts Workbench (Combination of model solvers SURE, STEM, PAWS, and common front-end model ASSIST), and the Fault Tree Compiler. The HARP program is studied and how well the user can model systems using this program is investigated. One of the important objectives will be to study how user friendly this program is, e.g., how easy it is to model the system, provide the input information, and interpret the results. The experiences of the author and his graduate students who used HARP in two graduate courses are described. Some brief comparisons were made with the ARIES program which the students also used. Theoretical studies of the modeling techniques used in HARP are also included. Of course no answer can be any more accurate than the fidelity of the model, thus an Appendix is included which discusses modeling accuracy. A broad viewpoint is taken and all problems which occurred in the use of HARP are discussed. Such problems include: computer system problems, installation manual problems, user manual problems, program inconsistencies, program limitations, confusing notation, long run times, accuracy problems, etc.