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1

Towards an integrated diagnostic development process for automotive systems  

Microsoft Academic Search

The paper presents a new diagnostic development platform for automotive systems. The development platform consists of a target ECU rapid prototyping system and a hardware-in-the-loop simulation (HILS) equipment. An integrated diagnostic process that seamlessly employs a graph-based dependency model and quantitative models for intelligent diagnosis is introduced, along with a practical example of model-based engine diagnosis. The diagnostic strategy is

Jianhui Luo; Krishna R. Pattipati; Liu Qiao; Shunsuke Chigusa

2005-01-01

2

Diagnostic processing system for automatic transmission of an automobile  

SciTech Connect

A diagnostic processing system is described for an automatic transmission of an automobile having an engine speed and an automobile speed, the automatic transmission having gears and a clutch. The diagnostic processing system comprises: gear position sensing means for generating gear position signals; and analyzation means for determining the gear position in dependence upon the engine speed, the automobile speed and the gear position signals when the gear position signals do not indicate a unique gear position.

Asagi, Y.; Ogawa, N.; Kasai, H.; Hattori, T.; Uriuhara, M.

1987-02-10

3

An integrated diagnostic system for a process controller  

SciTech Connect

The Oak Ridge National Laboratory Instrumentation and Controls Division is developing an integrated diagnostic system to aid a technician in diagnosing faults in a complex process controller. The integrated diagnostic system, which is being developed to run on 80386 machines in the Smalltalk language, will include an expert system to make a diagnosis, an on-line ''hypermedia'' manual (which includes equipment manuals and video) to supply additional help and reference material, and an automated procedure guide to take the technician through complex procedures for tasks such as parts replacement. 3 refs., 6 figs.

Mullens, J.A.; Williams, L.C.; Zabriskie, W.L.

1989-01-01

4

An Integrated Diagnostic Development Process for Automotive Engine Control Systems  

Microsoft Academic Search

Theory and applications of model-based fault diagnosis have progressed significantly in the last four decades. In addition, there has been increased use of model-based design and testing in the automotive industry to reduce design errors, perform rapid prototyping, and hardware-in-the-loop simulation (HILS). This paper presents a new model-based diagnostic development process for automotive engine control systems. This process seamlessly employs

Jianhui Luo; Krishna R. Pattipati; Liu Qiao; Shunsuke Chigusa

2007-01-01

5

Controllable optical emission spectroscopy diagnostic system for analysis of process chemistries  

Microsoft Academic Search

Optical emission spectroscopy (OES) diagnostics have been employed for many years in plasma etch end point detection schemes. Unfortunately some newer process systems have much lower optical emission or limited optical access. To overcome such limitations, an OES diagnostic system making use of variable e-beam has been developed. That system is described and initial experimental results are presented. A strong

P. L. Stephan Thamban; Jimmy Hosch; M. J. Goeckner

2010-01-01

6

Dual Processing and Diagnostic Errors  

ERIC Educational Resources Information Center

|In this paper, I review evidence from two theories in psychology relevant to diagnosis and diagnostic errors. "Dual Process" theories of thinking, frequently mentioned with respect to diagnostic error, propose that categorization decisions can be made with either a fast, unconscious, contextual process called System 1 or a slow, analytical,…

Norman, Geoff

2009-01-01

7

Prodiag--a hybrid artificial intelligence based reactor diagnostic system for process faults  

SciTech Connect

Commonwealth Research Corporation (CRC) and Argonne National Laboratory (ANL) are collaborating on a DOE-sponsored Cooperative Research and Development Agreement (CRADA), project to perform feasibility studies on a novel approach to Artificial Intelligence (Al) based diagnostics for component faults in nuclear power plants. Investigations are being performed in the construction of a first-principles physics-based plant level process diagnostic expert system (ES) and the identification of component-level fault patterns through operating component characteristics using artificial neural networks (ANNs). The purpose of the proof-of-concept project is to develop a computer-based system using this Al approach to assist process plant operators during off-normal plant conditions. The proposed computer-based system will use thermal hydraulic (T-H) signals complemented by other non-T-H signals available in the data stream to provide the process operator with the component which most likely caused the observed process disturbance.To demonstrate the scale-up feasibility of the proposed diagnostic system it is being developed for use with the Chemical Volume Control System (CVCS) of a nuclear power plant. A full-scope operator training simulator representing the Commonwealth Edison Braidwood nuclear power plant is being used both as the source of development data and as the means to evaluate the advantages of the proposed diagnostic system. This is an ongoing multi-year project and this paper presents the results to date of the CRADA phase.

Reifman, J.; Wei, T.Y.C.; Vitela, J.E. [Argonne National Lab., IL (United States); Applequist, C. A. [Commonwealth Research Corp., Chicago, IL (United States); Chasensky, T.M. [Commonwealth Edison Co., Chicago, IL (United States)

1996-03-01

8

Controllable optical emission spectroscopy diagnostic system for analysis of process chemistries  

SciTech Connect

Optical emission spectroscopy (OES) diagnostics have been employed for many years in plasma etch end point detection schemes. Unfortunately some newer process systems have much lower optical emission or limited optical access. To overcome such limitations, an OES diagnostic system making use of variable e-beam has been developed. That system is described and initial experimental results are presented. A strong correlation is observed between the optical emission intensity and e-beam current, a measurable electrical parameter. This correlation offers means to normalize optical signal and to be used as a feedback input to the electronics that control the plasma source. In addition there is a measurable response from the different lines due to energy of the electrons, indicating a new degree of freedom in the diagnostic that can be tapped for more precise analysis of end point.

Thamban, P. L. Stephan; Goeckner, M. J. [Department of Electrical Engineering, University of Texas at Dallas, Richardson, Texas 75083-0688 (United States); Hosch, Jimmy [Verity Instruments, Carrolton, Texas 75007-4887 (United States)

2010-01-15

9

Controllable optical emission spectroscopy diagnostic system for analysis of process chemistries.  

PubMed

Optical emission spectroscopy (OES) diagnostics have been employed for many years in plasma etch end point detection schemes. Unfortunately some newer process systems have much lower optical emission or limited optical access. To overcome such limitations, an OES diagnostic system making use of variable e-beam has been developed. That system is described and initial experimental results are presented. A strong correlation is observed between the optical emission intensity and e-beam current, a measurable electrical parameter. This correlation offers means to normalize optical signal and to be used as a feedback input to the electronics that control the plasma source. In addition there is a measurable response from the different lines due to energy of the electrons, indicating a new degree of freedom in the diagnostic that can be tapped for more precise analysis of end point. PMID:20113095

Thamban, P L Stephan; Hosch, Jimmy; Goeckner, M J

2010-01-01

10

Machine and Process System Diagnostics Using One-Step Prediction Maps  

SciTech Connect

This paper describes a method for machine or process system diagnostics that uses one-step prediction maps. The method uses nonlinear time series analysis techniques to form a one-step prediction map that estimates the next time series data point when given a sequence of previously measured time series data point. The difference between the predicted and measured time series values is a measure of the map error. The average value of this error should remain within some bound as long as both the dynamic system and its operating condition remain unchanged. However, changes in the dynamic system or operating condition will cause an increase in average map error. Thus, for a constant operating condition, monitoring the average map error over time should indicate when a change has occurred in the dynamic system. Furthermore, the map error itself forms a time series that can be analyzed to detect changes in system dynamics. The paper provides technical background in the nonlinear analysis techniques used in the diagnostic method, describes the creation of one-step prediction maps and their application to machine or process system diagnostics, and then presents results obtained from applying the diagnostic method to simulated and measured data.

Breeding, J.E.; Damiano, B.; Tucker, R.W., Jr.

1999-05-10

11

Dual processing and diagnostic errors.  

PubMed

In this paper, I review evidence from two theories in psychology relevant to diagnosis and diagnostic errors. "Dual Process" theories of thinking, frequently mentioned with respect to diagnostic error, propose that categorization decisions can be made with either a fast, unconscious, contextual process called System 1 or a slow, analytical, conscious, and conceptual process, called System 2. Exemplar theories of categorization propose that many category decisions in everyday life are made by unconscious matching to a particular example in memory, and these remain available and retrievable individually. I then review studies of clinical reasoning based on these theories, and show that the two processes are equally effective; System 1, despite its reliance in idiosyncratic, individual experience, is no more prone to cognitive bias or diagnostic error than System 2. Further, I review evidence that instructions directed at encouraging the clinician to explicitly use both strategies can lead to consistent reduction in error rates. PMID:19669921

Norman, Geoff

2009-08-11

12

Data processing and analysis of the imaging Thomson scattering diagnostic system on HT-7 tokamak.  

PubMed

A high spatial resolution imaging Thomson scattering diagnostic system was developed in ASIPP (Institute of Plasma Physics, Chinese Academy of Sciences). After about one month trial running on the superconducting HT-7 (Hefei Tokamak-7) tokamak, the system was proved to be capable of measuring plasma electron temperature. The system setup and data calibration are described in this paper and then the instrument function is studied in detail, as well as the measurement capability, an electron temperature of 50 eV to 2 keV and density beyond 1 × 10(19) m(-3). Finally, the data processing method and experimental results are presented. PMID:23742546

Han, Xiaofeng; Shao, Chunqiang; Xi, Xiaoqi; Zhao, Junyu; Qing, Zang; Yang, Jianhua; Dai, Xingxing; Kado, Shinichiro

2013-05-01

13

EMAT weld inspection and weld machine diagnostic system for continuous coil processing lines  

NASA Astrophysics Data System (ADS)

Weld breaks of steel coil during cold rolling and continuous pickling operations are a significant source of lost productivity and product yield. Babcock and Wilcox Innerspec Technologies has developed a weld process control system which monitors the key variables of the welding process and determines the quality of the welds generated by flash butt welding equipment. This system is known as the Temate 2000 Automated Flash Butt Weld Inspection and Weld Machine Diagnostic System. The Temate 2000 system utilizes electro- magnetic acoustic transducer (EMAT) technology as the basis for performing on-line, real-time, nondestructive weld quality evaluation. This technique accurately detects voids, laps, misalignment and over/under trim conditions in the weld. Results of the EMAT weld inspection are immediately presented to the weld machine operator for disposition. Welding process variables such as voltage, current, platen movements and upset pressures are monitored and collected with the high speed data acquisition system. This data is processed and presented in real-time display to indicate useful welding process information such as platen crabbing, upset force, peak upset current, and many others. Alarming for each variable is provided and allows detailed maintenance reports and summary information to be generated. All weld quality and process parameter data are stored, traceable to each unique weld, and available for post process evaluation. Installation of the Temate 2000 system in a major flat rolled steel mill has contributed to near elimination of weld breakage and increased productivity at this facility.

Latham, Wayne M.; MacLauchlan, Dan; Geier, Dan P.; Lang, Dennis D.

1996-11-01

14

IGENPRO knowledge-based digital system for process transient diagnostics and management  

SciTech Connect

Verification and validation issues have been perceived as important factors in the large scale deployment of knowledge-based digital systems for plant transient diagnostics and management. Research and development (R&D) is being performed on the IGENPRO package to resolve knowledge base issues. The IGENPRO approach is to structure the knowledge bases on generic thermal-hydraulic (T-H) first principles and not use the conventional event-basis structure. This allows for generic comprehensive knowledge, relatively small knowledge bases and above all the possibility of T-H system/plant independence. To demonstrate concept feasibility the knowledge structure has been implemented in the diagnostic module PRODIAG. Promising laboratory testing results have been obtained using data from the full scope Braidwood PWR operator training simulator. This knowledge structure is now being implemented in the transient management module PROMANA to treat unanticipated events and the PROTREN module is being developed to process actual plant data. Achievement of the IGENPRO R&D goals should contribute to the acceptance of knowledge-based digital systems for transient diagnostics and management.

Morman, J.A.; Reifman, J.; Wei, T.Y.C. [Argonne National Lab., IL (United States)] [and others

1997-12-31

15

Performance assessment and adoption processes of an information monitoring and diagnostic system prototype  

SciTech Connect

This report addresses the problem that buildings do not perform as well as anticipated during design. We partnered with an innovative building operator to evaluate a prototype Information Monitoring and Diagnostic System (IMDS). The IMDS consists of high-quality measurements archived each minute, a data visualization tool, and a web-based capability. The operators recommend similar technology be adopted in other buildings. The IMDS has been used to identify and correct a series of control problems. It has also allowed the operators to make more effective use of the building control system, freeing up time to take care of other tenant needs. They believe they have significantly improved building comfort, potentially improving tenant health, and productivity. The reduction in hours to operate the building are worth about $20,000 per year, which could pay for the IMDS in about five years. A control system retrofit based on findings from the IMDS is expected to reduce energy use by 20 percent over the next year, worth over $30,000 per year. The main conclusion of the model-based chiller fault detection work is that steady-state models can be used as reference models to monitor chiller operation and detect faults. The ability of the IMDS to measure cooling load and chiller power to one-percent accuracy with a one-minute sampling interval permits detection of additional faults. Evolutionary programming techniques were also evaluated, showing promise in the detection of patterns in building data. We also evaluated two technology adoption processes, radical and routine. In routine adoption, managers enhance features of existing products that are already well understood. In radical adoption, innovative building managers introduce novel technology into their organizations without using the rigorous payback criteria used in routine innovations.

Piette, Mary Ann

1999-10-01

16

Avionics Diagnostic System (ADS).  

National Technical Information Service (NTIS)

The presentation will provide system design including a description of the commands, outputs and diagnostic capabilities provided by the ADS we created. Issues and decisions will also be described as will thoughts on potential new features that could be a...

T. Risko

1999-01-01

17

Diagnostic Radiology Information System Design.  

National Technical Information Service (NTIS)

The purpose of this, the first phase in the development of a Diagnostic Radiology Information System (DRIS), has been to identify areas of information processing problems as they occur in the practice of radiology, and then to design a system with general...

H. C. Jacobson H. J. Barnhard J. W. Nance

1970-01-01

18

New detection system and signal processing for the tokamak ISTTOK heavy ion beam diagnostic.  

PubMed

The tokamak ISTTOK havy ion beam diagnostic (HIBD) operates with a multiple cell array detector (MCAD) that allows for the plasma density and the plasma density fluctuations measurements simultaneously at different sampling volumes across the plasma. To improve the capability of the plasma density fluctuations investigations, a new detection system and new signal conditioning amplifier have been designed and tested. The improvements in MCAD design are presented which allow for nearly complete suppression of the spurious plasma background signal by applying a biasing potential onto special electrodes incorporated into MCAD. The new low cost and small size transimpedance amplifiers are described with the parameters of 400 kHz, 10(7) V/A, 0.4 nA of RMS noise, adequate for the plasma density fluctuations measurements. PMID:23126879

Henriques, R B; Nedzelskiy, I S; Malaquias, A; Fernandes, H

2012-10-01

19

New detection system and signal processing for the tokamak ISTTOK heavy ion beam diagnostic  

NASA Astrophysics Data System (ADS)

The tokamak ISTTOK havy ion beam diagnostic (HIBD) operates with a multiple cell array detector (MCAD) that allows for the plasma density and the plasma density fluctuations measurements simultaneously at different sampling volumes across the plasma. To improve the capability of the plasma density fluctuations investigations, a new detection system and new signal conditioning amplifier have been designed and tested. The improvements in MCAD design are presented which allow for nearly complete suppression of the spurious plasma background signal by applying a biasing potential onto special electrodes incorporated into MCAD. The new low cost and small size transimpedance amplifiers are described with the parameters of 400 kHz, 107 V/A, 0.4 nA of RMS noise, adequate for the plasma density fluctuations measurements.

Henriques, R. B.; Nedzelskiy, I. S.; Malaquias, A.; Fernandes, H.

2012-10-01

20

Mechanical Diagnostics System Engineering in IMD HUMS  

Microsoft Academic Search

The Goodrich Integrated Mechanical Diagnostics Health and Usage System (IMD-HUMS) mechanical diagnostics functionality is the integration of disparate subsystems. When the aircraft is in the appropriate capture window, the primary processing unit (PPU), commands the vibration processing unit (VPU) to capture vibration data and a tachometer reference. This time domain data is processed by standard and proprietary algorithms to generate

Eric Bechhoefer; Eric Mayhew

2006-01-01

21

Embedded diagnostics in combat systems  

Microsoft Academic Search

Diagnostics capability of combat systems shall be compatible with the Army Diagnostic Improvement Program. Present systems are capable of performing health monitoring and health checks using internal embedded resources. They employ standard sensors and data busses that monitor data signals and built-in test (BIT). These devices provide a comprehensive source of data to accomplish an accurate system level diagnostics and

Christopher Miles; Elena N. Bankowski

2004-01-01

22

Laser diagnostics of combustion processes  

NASA Astrophysics Data System (ADS)

Several examples of the application of laser induced fluorescence (LIF) detection to diagnostics of combustion processes are presented. The temperature distribution in a laminar flame can be measured by LIF detection of OH radicals via predissociated states. Two- dimensional density distributions of CH and C2 are studied by LIF in flame deposition of diamond. It is even possible to apply LIF detection to visualize NO in a running Diesel engine.

Ter Meulen, J. J.

1995-03-01

23

TMX-U diagnostic system  

SciTech Connect

Using data from the TMX-U diagnostic system, the production of sloshing ions has already been verified and the formation of electron thermal barriers is presently being investigated on the Tandem Mirror Experiment-Upgrade (TMX-U) at Lawrence Livermore National Laboratory. The TMX-U diagnostics are made up of the earlier TMX complement of diagnostics that determine confinement, microstability, and low-frequency stability, plus diagnostic instrumentation that measures electron parameters associated with mirror-confined electrons. This paper describes the three subsystems within the TMX-U diagnostic system: (1) the diagnostic facility (shot leader console, data cable system, and diagnostic timing system); (2) the individual diagnostic instruments that measure plasma and machine parameters; and (3) the data-acquisition and -analysis computer.

Correll, D.L.

1983-09-02

24

The Henry Ford Production System: LEAN Process Redesign Improves Service in the Molecular Diagnostic Laboratory  

PubMed Central

Accurate and timely molecular test results play an important role in patient management; consequently, there is a customer expectation of short testing turnaround times. Baseline data analysis revealed that the greatest challenge to timely result generation occurred in the preanalytic phase of specimen collection and transport. Here, we describe our efforts to improve molecular testing turnaround times by focusing primarily on redesign of preanalytic processes using the principles of LEAN production. Our goal was to complete greater than 90% of the molecular tests in less than 3 days. The project required cooperation from different laboratory disciplines as well as individuals outside of the laboratory. The redesigned processes involved defining and standardizing the protocols and approaching blood and tissue specimens as analytes for molecular testing. The LEAN process resulted in fewer steps, approaching the ideal of a one-piece flow for specimens through collection/retrieval, transport, and different aspects of the testing process. The outcome of introducing the LEAN process has been a 44% reduction in molecular test turnaround time for tissue specimens, from an average of 2.7 to 1.5 days. In addition, extending LEAN work principles to the clinician suppliers has resulted in a markedly increased number of properly collected and shipped blood specimens (from 50 to 87%). These continuous quality improvements were accomplished by empowered workers in a blame-free environment and are now being sustained with minimal management involvement.

Cankovic, Milena; Varney, Ruan C.; Whiteley, Lisa; Brown, Ron; D'Angelo, Rita; Chitale, Dhananjay; Zarbo, Richard J.

2009-01-01

25

Knowledge Management for Process Diagnostics and Improvement  

Microsoft Academic Search

This paper describes the benefits and features of knowledge management for process diagnostics and improvement. Large corporations are in search of better ways to diagnose and improve manufacturing processes. They are examining techniques to manage their knowledge and share it with others in the organization in or der to make better decision in process diagnostics. Currently, they create and maintain

Son H. Bui; Jay Raja

26

Design and Implementation Methodology for Diagnostic Systems.  

National Technical Information Service (NTIS)

A methodology for design and implementation of diagnostic systems is presented. Also discussed are the advantages of embedding a diagnostic system in a host system environment. The methodology utilizes an architecture for diagnostic system development tha...

L. J. F. Williams

1988-01-01

27

ADHD Subtypes and Co-Occurring Anxiety, Depression, and Oppositional-Defiant Disorder: Differences in Gordon Diagnostic System and Wechsler Working Memory and Processing Speed Index Scores  

ERIC Educational Resources Information Center

|Objective: Wechsler Intelligence Scale for Children Freedom-from-Distractibility/Working Memory Index (FDI/WMI), Processing Speed Index (PSI), and Gordon Diagnostic System (GDS) scores in ADHD children were examined as a function of subtype and coexisting anxiety, depression, and oppositional-defiant disorder. Method: Participants were 587…

Mayes, Susan Dickerson; Calhoun, Susan L.; Chase, Gary A.; Mink, Danielle M.; Stagg, Ryan E.

2009-01-01

28

Diagnostic Tools for HVOF Process Optimization.  

National Technical Information Service (NTIS)

The aim of this work was to show the workability of diagnostic tools in the HVOF process. The focus was on first order process mapping, including on-line diagnostics and single splat studies. Nanocrystalline alumina composites and quasicrystals were selec...

E. Turunen

2005-01-01

29

Embedded diagnostics in combat systems  

NASA Astrophysics Data System (ADS)

Diagnostics capability of combat systems shall be compatible with the Army Diagnostic Improvement Program. Present systems are capable of performing health monitoring and health checks using internal embedded resources. They employ standard sensors and data busses that monitor data signals and built-in test (BIT). These devices provide a comprehensive source of data to accomplish an accurate system level diagnostics and fault isolation at line replaceable unit (LRU) level. Prognostics routines provide capability to identify the cause of predicted failure and corrective action to prevent unscheduled maintenance action. Combat system"s health status and prognostic information are displayed to operator, crew, and maintenance personnel. Present systems use common data/information interchange network in accordance with standards defined in the Joint Technical Architecture (JTA) to provide access to vehicle"s health data. The technologies utilized in present systems include embedded diagnostics, combat maintainer, schematic viewer, etc. Implementation of these technologies significantly reduced maintenance hours of combat systems. Health monitoring, diagnostics and prognostics of future systems will utilize federated software and probes approach. Gauges will determine if the system operates within acceptable performance bands by monitoring data provided by the probes. Health monitoring system will use models of missions to make intelligent choices considering tasks criticality.

Miles, Christopher; Bankowski, Elena N.

2004-07-01

30

Family Experiences through the Autism Diagnostic Process  

ERIC Educational Resources Information Center

|The primary aim of this study was to investigate common family experiences during the autism spectrum disorder (ASD) diagnostic process, and the child and family variables that may relate to different diagnostic outcomes. A secondary aim of this study was to evaluate families' knowledge of the research support for various interventions. To…

Sansosti, Frank J.; Lavik, Katherine B.; Sansosti, Jenine M.

2012-01-01

31

Family Experiences through the Autism Diagnostic Process  

ERIC Educational Resources Information Center

The primary aim of this study was to investigate common family experiences during the autism spectrum disorder (ASD) diagnostic process, and the child and family variables that may relate to different diagnostic outcomes. A secondary aim of this study was to evaluate families' knowledge of the research support for various interventions. To…

Sansosti, Frank J.; Lavik, Katherine B.; Sansosti, Jenine M.

2012-01-01

32

Hydraulic System Acoustical Diagnostics.  

National Technical Information Service (NTIS)

This project is a continuation of previous acoustics studies conducted to determine if the vibration signature of hydraulic components could provide information concerning the operational health of the system. The concept of using internally produced nois...

R. Inoue R. K. King

1980-01-01

33

Plasma diagnostics for unraveling process chemistry.  

PubMed

This review focuses on the use of diagnostic tools to examine plasma processing chemistry, primarily plasma species energetics, dynamics, and molecule-surface reactions. We describe the use of optical diagnostic tools, mass spectrometry, and Langmuir probes in measuring species densities, rotational and kinetic energies, and plasma-surface reactions. Molecule-surface interactions for MX(n) species (M = C, Si, N; X = H, F, Cl) are presented and interpreted with respect to the molecule's electronic configuration and dipole moments. PMID:20636081

Stillahn, Joshua M; Trevino, Kristina J; Fisher, Ellen R

2008-01-01

34

Process diagnostics in suspension plasma spraying  

Microsoft Academic Search

Benefits and limitations of process diagnostics are investigated for the suspension plasma spraying of yttria-stabilized zirconia thermal barrier coatings. The methods applied were enthalpy probe measurements, optical emission spectroscopy, and in-flight particle diagnostic.It was proved that the plasma characteristics are not affected negatively by the injection of the ethanol based suspension since the combustion of species resulting from ethanol decomposition

Georg Mauer; Alexandre Guignard; Robert Vaßen; Detlev Stöver

2010-01-01

35

A framework for systematic benchmarking of monitoring and diagnostic systems  

Microsoft Academic Search

In this paper, we present an architecture and a formal framework to be used for systematic benchmarking of monitoring and diagnostic systems and for producing comparable performance assessments of different diagnostic technologies. The framework defines a number of standardized specifications, which include a fault catalog, a library of modular test scenarios, and a common protocol for gathering and processing diagnostic

Tolga Kurtoglu; Ole J. Mengshoel; Scott Poll

2008-01-01

36

A first-principles generic methodology for representing the knowledge base of a process diagnostic expert system  

SciTech Connect

In this paper we present a methodology for identifying faulty component candidates of process malfunctions through basic physical principles of conservation, functional classification of components and information from the process schematics. The basic principles of macroscopic balance of mass, momentum and energy in thermal hydraulic control volumes are applied in a novel approach to incorporate deep knowledge into the knowledge base. Additional deep knowledge is incorporated through the functional classification of process components according to their influence in disturbing the macroscopic balance equations. Information from the process schematics is applied to identify the faulty component candidates after the type of imbalance in the control volumes is matched against the functional classification of the components. Except for the information from the process schematics, this approach is completely general and independent of the process under consideration. The use of basic first-principles, which are physically correct, and the process-independent architecture of the diagnosis procedure allow for the verification and validation of the system. A prototype process diagnosis expert system is developed and a test problem is presented to identify faulty component candidates in the presence of a single failure in a hypothetical balance of plant of a liquid metal nuclear reactor plant.

Reifman, J.; Briggs, L.L.; Wei, T.Y.C.

1990-01-01

37

Self-learning fuzzy logic system for in situ, in-process diagnostics of mass flow controller (MFC)  

Microsoft Academic Search

An improvement in the yield of better quality wafers requires an accurate control of various process variables. The control should include timely diagnosis and appropriate in-situ, in-process adjustments for drifts in these variables. One such scheme, a self-learning fuzzy logic system, is developed in this study for correcting drifts in the calibration of mass flow controllers (MFC's) that control the

Ram K. Ramamurthi

1994-01-01

38

MTX (Microwave Tokamak Experiment) Plasma Diagnostic System.  

National Technical Information Service (NTIS)

In this paper, a general overview of the MTX plasma diagnostics system is given. This includes a description of the MTX machine configuration and the overall facility layout. The data acquisition system and techniques for diagnostic signal transmission ar...

B. W. Rice E. B. Hooper C. A. Brooksby

1987-01-01

39

Philosophy of science and the diagnostic process.  

PubMed

This is an overview of the principles that underpin philosophy of science and how they may provide a framework for the diagnostic process. Although philosophy dates back to antiquity, it is only more recently that philosophers have begun to enunciate the scientific method. Since Aristotle formulated deduction, other modes of reasoning including induction, inference to best explanation, falsificationism, theory-laden observations and Bayesian inference have emerged. Thus, rather than representing a single overriding dogma, the scientific method is a toolkit of ideas and principles of reasoning. Here we demonstrate that the diagnostic process is an example of science in action and is therefore subject to the principles encompassed by the scientific method. Although a number of the different forms of reasoning are used readily by clinicians in practice, without a clear understanding of their pitfalls and the assumptions on which they are based, it leaves doctors open to diagnostic error. We conclude by providing a case example from the medico-legal literature in which diagnostic errors were made, to illustrate how applying the scientific method may mitigate the chance for diagnostic error. PMID:23816636

Willis, Brian H; Beebee, Helen; Lasserson, Daniel S

2013-07-01

40

Uses of diagnostic expert systems in clinical care.  

PubMed Central

The development and testing of computerized systems to assist in the diagnostic process is a time honored research activity in medical information science. The focus of the majority of the applications produced is on providing accurate diagnostic suggestions when appropriate clinical information is entered. We believe that diagnostic knowledge has a much wider range of uses than that of simply assigning diagnostic labels. Below we describe three applications which illustrate alternate uses for diagnostic systems. Applications that assist in data collection, assess the quality of medical reports, and extract relevant clinical data from natural language x-ray reports are discussed. We believe that more effort should be directed toward studying the use of diagnostic knowledge bases in processes that help plan diagnostic strategies, in quality assurance applications, and in processes that facilitate all aspects of medical communication.

Haug, P. J.

1993-01-01

41

Measures of testability for automatic diagnostic systems  

Microsoft Academic Search

Evaluation models of automatic diagnostic systems are investigated taking into consideration their imperfections such as failure to diagnose, incorrect isolation, false alarms, and inability to duplicate. Three measures of effectiveness are developed that enable the decision-maker to assess accurately the real capability of the diagnostic system and to evaluate and compare the performances of alternative automatic diagnostic systems based on

Nael A. E. Aly; Adel A. Aly

1988-01-01

42

Video integrated measurement system. [Diagnostic display devices  

SciTech Connect

A Video Integrated Measurement (VIM) System is described which incorporates the use of various noninvasive diagnostic procedures (moire contourography, electromyography, posturometry, infrared thermography, etc.), used individually or in combination, for the evaluation of neuromusculoskeletal and other disorders and their management with biofeedback and other therapeutic procedures. The system provides for measuring individual diagnostic and therapeutic modes, or multiple modes by split screen superimposition, of real time (actual) images of the patient and idealized (ideal-normal) models on a video monitor, along with analog and digital data, graphics, color, and other transduced symbolic information. It is concluded that this system provides an innovative and efficient method by which the therapist and patient can interact in biofeedback training/learning processes and holds considerable promise for more effective measurement and treatment of a wide variety of physical and behavioral disorders.

Spector, B.; Eilbert, L.; Finando, S.; Fukuda, F.

1982-06-01

43

A dynamic fuzzy reasoning method for adaptive diagnostic systems design  

Microsoft Academic Search

Tackles some critical issues in diagnostic problem solving by addressing the conceptual design of automatic diagnostic systems able to cope with complex dynamic processes. The dynamic switching fuzzy system model introduced by M.H. Smith (1994) is used as a generalized framework which dynamically changes the reasoning method by tuning the operators and\\/or defuzzification methods. This technique is applied to tune

Mihaela Ulieru; Michael H. Smith

1996-01-01

44

How community context affects entrepreneurial process: A diagnostic framework  

Microsoft Academic Search

This study reports a multi-faceted search to discover and articulate, in the form of a manageable framework, a diagnostic system for assessing the influence that community factors will have upon the conduct and outcome of any proposed entrepreneurial process. A methodological approach based on investigation of a rich empirical database supported by a wide examination of extant theory in several

Kevin Hindle

2010-01-01

45

Multianalytical system (MAS): software for enzyme-linked immunosorbent assay (ELISA) data processing with applications to screening and diagnostic tests.  

PubMed

A microcomputer software package for determining the concentration of either the antibody or antigen from ELISA data for IBM PC compatible is presented. In the program optical densities (OD) and fluorescence obtained from 96-well ELISA plate can be input either directly, by interfacing with different brands of microplate reader such as Multiskan II Plus and Organon Teknika to the computer or manually. This software utilizes some mathematical and statistical models to fit the standard curve of each assay and interpolate analyte concentration using data from OD or fluorescence measurements. Cubic spline (Guardabasso et al., 1988), bezier and polynomial (Rodbard, 1979; Baud et al., 1991) interpolation formulas can be used to fit the data over the entire range for estimating the antibody or antigen concentration of the unknown samples whose OD or fluorescence is beyond the entire range. This software package, based on the concentration values of the analyte determined in different fluids (Núnez et al., 1994; Morales et al., 1994) and with some rules and algorithms, is used to calculate the parameters of screening and diagnostic tests such as sensitivity, specificity and predictive values (Coughlin et al., 1992). With the construction of the Receiver Operating Characteristic (ROC) curve it is possible to analyse different values of the sensitivity and specificity of the screening and diagnostic tests. A comparative statistical test for two populations that are non-normally distributed using a non-parametric Mann-Whitney test is provided. This software is an expandable tool designed for general use in clinical and experimental applications, including diagnostic and screening tests. PMID:8841448

Iznaga Escobar, N; Solozabal Armstrong, J; Núnez Gandolff, G; Morales Morales, A; Perdomo Valdés, Y; Perdomo Almeida, A; Garcia Trápaga, C; Artaza Hernández, E

1996-09-13

46

Model-Based Assurance of Diagnostic Procedures for Complex Systems.  

National Technical Information Service (NTIS)

Verifying diagnostic procedures for complex systems is hard and labor-intensive. Usually this verification is accomplished primarily through extensive review of the procedures by experts. We aim to augment this review process by using insights from compar...

M. S. Feather R. Lutz T. Kurtoglu

2010-01-01

47

MTX (Microwave Tokamak Experiment) plasma diagnostic system  

NASA Astrophysics Data System (ADS)

In this paper, a general overview of the MTX plasma diagnostics system is given. This includes a description of the MTX machine configuration and the overall facility layout. The data acquisition system and techniques for diagnostic signal transmission are also discussed. In addition, the diagnostic instruments planned for both an initial ohmic-heating set and a second FEL-heating set are described. The expected range of plasma parameters along with the planned plasma measurements will be reviewed.

Rice, B. W.; Hooper, E. B.; Brooksby, C. A.

1987-10-01

48

MTX (Microwave Tokamak Experiment) plasma diagnostic system  

SciTech Connect

In this paper, a general overview of the MTX plasma diagnostics system is given. This includes a description of the MTX machine configuration and the overall facility layout. The data acquisition system and techniques for diagnostic signal transmission are also discussed. In addition, the diagnostic instruments planned for both an initial ohmic-heating set and a second FEL-heating set are described. The expected range of plasma parameters along with the planned plasma measurements will be reviewed. 7 refs., 5 figs.

Rice, B.W.; Hooper, E.B.; Brooksby, C.A.

1987-10-07

49

Study of characteristics of a short-range multistatic radar system for diagnostics of the dynamic processes  

NASA Astrophysics Data System (ADS)

Based on the correlation and ranging methods, we developed an algorithm determining the coordinates of moving sources of wideband noise. The main advantage of this algorithm is the ability to eliminate the ambiguities of determining the target coordinates arising in the multistatic systems. To test the proposed algorithm, a laboratory passive multistatic radar system was designed and assembled. This paper describes the parameters of the experiment conducted using this system. The obtained results are discussed and analyzed.

Kanakov, V. A.; Gorda, V. V.

2013-07-01

50

System-related factors contributing to diagnostic errors.  

PubMed

Several studies in primary care, internal medicine, and emergency departments show that rates of errors in test requests and result interpretations are unacceptably high and translate into missed, delayed, or erroneous diagnoses. Ineffective follow-up of diagnostic test results could lead to patient harm if appropriate therapeutic interventions are not delivered in a timely manner. The frequency of system-related factors that contribute directly to diagnostic errors depends on the types and sources of errors involved. Recent studies reveal that the errors and patient harm in the diagnostic testing loop have occurred mainly at the pre- and post-analytic phases, which are directed primarily by clinicians who may have limited expertise in the rapidly expanding field of clinical pathology. These errors may include inappropriate test requests, failure/delay in receiving results, and erroneous interpretation and application of test results to patient care. Efforts to address system-related factors often focus on technical errors in laboratory testing or failures in delivery of intended treatment. System-improvement strategies related to diagnostic errors tend to focus on technical aspects of laboratory medicine or delivery of treatment after completion of the diagnostic process. System failures and cognitive errors, more often than not, coexist and together contribute to the incidents of errors in diagnostic process and in laboratory testing. The use of highly structured hand-off procedures and pre-planned follow-up for any diagnostic test could improve efficiency and reliability of the follow-up process. Many feedback pathways should be established so that providers can learn if or when a diagnosis is changed. Patients can participate in the effort to reduce diagnostic errors. Providers should educate their patients about diagnostic probabilities and uncertainties. The patient-safety strategies focusing on the interface between diagnostic system and therapeutic intervention are strategies that involve both processes to facilitate appropriate follow-up and structural changes, such as the use of electronic tracking systems and patient navigation programs. PMID:24070581

Thammasitboon, Satid; Thammasitboon, Supat; Singhal, Geeta

2013-10-01

51

Diagnostic Reasoning in the Use of Travel Management System  

Microsoft Academic Search

We explore the appropriation of a self-management administrative system from the perspective of diagnostic reasoning. The\\u000a case study, based on documents, ethnography and videotapes, concerns the appropriation of a travel management system in a\\u000a major university in Finland. To explore this process from a user-centric view, we focus on the diagnostic work required in\\u000a the appropriation of the new system,

Ilkka Arminen; Piia Poikus

2009-01-01

52

[Optimization of therapeutic and diagnostic processes in the system of obligatory medical insurance in an outpatient ENT department].  

PubMed

How to organize effective activity of an outpatient ENT department in the system of obligatory medical insurance (OMI) is considered. To achieve this purpose, an analysis of everyday activity of an outpatient department was made with estimation of reference morbidity, epidemiological data on the residents of the Central Moscow District. Measures for introduction of novel technologies in therapeutic outpatient ENT practice are proposed. They include introduction of new otorhinolaryngological services, intensification of the work of ENT specialists, stimulation of their interest in mastering allied specialties, stimulation of medical assistants interest in mastering new procedures, estimation of ENT services cost and minimizing the difference between the cost of the service and salaries of the medical personnel. PMID:15111948

Anikeeva, Z I; Avdeeva, S N; Vasilinenko, V A; Pleshkov, I V

2004-01-01

53

Diagnostic expert systems from dynamic fault trees  

Microsoft Academic Search

A methodology for developing a diagnostic map for systems that can be analyzed via a dynamic fault tree is proposed in this paper. This paper shows how to automatically design a diagnostic decision tree from a dynamic fault tree used for reliability analysis. In particular the methodology makes use of Markov chains since they are mathematical models used for reliability

Tariq Assaf; Joanne Bechta Dugan

2004-01-01

54

Survey on Current and Proposed Diagnostic Systems.  

National Technical Information Service (NTIS)

This report provides a review of what has been done and is being done in the area of engine diagnostics and recommends possible approaches for a non-integrated diagnostic system for current aircraft. This study was performed to determine what present syst...

G. F. Bucsek

1975-01-01

55

Fuzzy fault diagnostic system based on fault tree analysis  

Microsoft Academic Search

A method is presented for process fault diagnosis using information from fault tree analysis and uncertainty\\/imprecision of data. Fault tree analysis, which has been used as a method of system reliability\\/safety analysis, provides a procedure for identifying failures within a process. A fuzzy fault diagnostic system is constructed which uses the fuzzy fault tree analysis to represent a knowledge of

Zong-Xiao Yang; Kazuhiko SUZUKI; Yukiyasu SHIMADA; Hayatoshi SAYAMA

1995-01-01

56

Robust diagnostic system: structural redundancy approach  

NASA Astrophysics Data System (ADS)

We have developed and field tested a real-time robust diagnostic system, which uses hierarchical, multiple-aspect models of plants. The models include the functional structure, timed failure propagation graphs, physical component structure, and component failure modes. The diagnostic reasoning applies structural and temporal constraints for the generation and validation of fault hypotheses using the `predictor-corrector' principle. The diagnosis is generated in real time, amid an evolving alarm scenario, and uses progressive deepening control strategy. The robust diagnostic system has been tested and demonstrated using ECLSS models obtained from the Boeing Company.

Misra, Amit; Sztipanovits, Janos; Carnes, James R.

1994-03-01

57

Optical signal acquisition and processing in future accelerator diagnostics  

SciTech Connect

Beam detectors such as striplines and wall current monitors rely on matched electrical networks to transmit and process beam information. Frequency bandwidth, noise immunity, reflections, and signal to noise ratio are considerations that require compromises limiting the quality of the measurement. Recent advances in fiber optics related technologies have made it possible to acquire and process beam signals in the optical domain. This paper describes recent developments in the application of these technologies to accelerator beam diagnostics. The design and construction of an optical notch filter used for a stochastic cooling system is used as an example. Conceptual ideas for future beam detectors are also presented.

Jackson, G.P. [Fermi National Accelerator Lab., Batavia, IL (United States); Elliott, A. [Illinois Univ., Chicago, IL (United States)

1992-12-31

58

Measurement and diagnostic system for crankshaft of diesel engine  

Microsoft Academic Search

Measurement and diagnostic for crankshaft of diesel engines is very important to guarantee reliable operation through-out the working process. This paper studies on the capability of the system for crankshaft torsional oscillation. To establish the instantaneous angular speed waveform, the shaft speed signal has been used. This paper also introduced a new describing method based on the polar coordinate system

Liu Yong; Zhang Sai Fei

2010-01-01

59

Diagnostic Analysis of an Irrigation System in the Andes Region  

Microsoft Academic Search

ABSTRACT The recognized inefficiency of many irrigation systems, set up in developing countries in the past years, forced the attention to be focused on the investigation of the causes of such a failure. The diagnostic analysis, an investigation process which aims at revealing problems, causes and effects related to the relevant actors involved in the system, has been applied to

P. Bresci; E. Preti

60

Prognostic\\/Diagnostic Health Management System (PHM) for Fab Efficiency  

Microsoft Academic Search

In this work, a prognostic\\/diagnostic approach was made to use knowledge-based system to accelerate the process\\/equipment faults detection and classification. The domain knowledge within the fab environment can be either captured by PHM systems or populated by the experienced engineers. With the implementation of the proposed PHM system, domain knowledge stored in the PHM-equip and PHM-APC (advanced process control) subsystems

Chin Sun; Kevin Nguyen; Long Vu; S. C. Bisland

2006-01-01

61

Racine Feedback and Diagnostic System.  

ERIC Educational Resources Information Center

The system is a comprehensive set of computer programs and procedures for assisting in the preparation, scoring and analysis of multiple choice test batteries. The system may be used with either standardized or locally developed tests. For the upper grades the system accepts pupil responses on mark-sense answer sheets. For lower grades pupil…

Racine Unified School District 1, WI.

62

Turbine Engine Diagnostics System Study (Final Report).  

National Technical Information Service (NTIS)

The results of a system study for the Turbine Engine Diagnostics (TED) program are presented. This research project was initiated to develop a method of approach and prototype design for a system capable of predicting the failure of rotating parts in turb...

B. K. Mcquiston R. L. Dehoff

1991-01-01

63

Generic Integrated Maintenance Diagnostics (GIMADS): designing weapon systems with the maintainer in mind  

Microsoft Academic Search

The Generic Integrated Maintenance Diagnostics program, known as GIMADS, is a joint effort by the US Air Force and industry to formulate a systems engineering approach for maintenance diagnostics. The program is developing written guidance-a Military Standard, and US Air Force Guide Specification-to integrate maintenance diagnostics considerations into every phase of the weapon system development process, from operational requirements determination

H. A. Orr

1988-01-01

64

A specialized framework for Medical Diagnostic Knowledge Based Systems.  

PubMed Central

To have a knowledge based system (KBS) exhibiting an intelligent behavior, it must be endowed even with knowledge able to represent the expert's strategies, other than with domain knowledge. The elicitation task is inherently difficult for strategic knowledge, because strategy is often tacit, and, even when it has been made explicit, it is not an easy task to describe it in a form that may be directly translated and implemented into a program. This paper describes a Specialized Framework for Medical Diagnostic Knowledge Based Systems able to help an expert in the process of building KBSs in a medical domain. The framework is based on an epistemological model of diagnostic reasoning which has proved to be helpful in describing the diagnostic process in terms of the tasks by which it is composed of.

Lanzola, G.; Stefanelli, M.

1991-01-01

65

Systemic Candidiasis, A Diagnostic Challenge  

PubMed Central

The serious and increasing problem of deep-seated Candida infection and the difficulties encountered in diagnosis of this entity prompted review of all well-documented cases of systemic candidiasis in a 39-month period at Stanford Medical Center. In only 19 of the 40. cases (47.5 percent) was the diagnosis suspected premortem; in 15 (37.5 percent) of these, the diagnosis was established. Thirty-three (82.5 percent) of the 40 patients died, and in 12 (39.4 percent) of them Candida infection was considered to be the primary cause of death or a major contributing factor. The seven survivors were treated either by specific chemotherapy or drainage of abscesses and empyema cavities. When the data were assessed in relation to underlying diseases and other possible predisposing factors, surgery was implicated in 50 percent of the total. In a study to define the prevalence of Candida in the saliva of patients with severe underlying illnesses receiving antibiotics or immunosuppressive therapy at the Stanford Medical Center, a significantly higher prevalence was noted in the multiple therapeutic modality group than in controls. In a review of reported data on methods for serological diagnosis of systemic candidiasis, only the precipitin and agglutinin methods appear promising.

Hughes, James M.; Remington, Jack S.

1972-01-01

66

The EMMA Accelerator, a Diagnostic Systems Overview  

SciTech Connect

The 'EMMA' Non-Scaling Fixed Field Alternating Gradient (ns-FFAG) international project is currently being commissioned at Daresbury Laboratory, UK. This accelerator has been equipped with a number of diagnostic systems to facilitate this. These systems include a novel time-domain-multiplexing BPM system, moveable screen systems, a time-of-flight instrument, Faraday cups, and injection/extraction tomography sections to analyze the single bunch beams. An upgrade still to implement includes the installation of wall current monitors. This paper gives an overview of these systems and shows some data and results from the diagnostics that have contributed to the successful demonstration of a serpentine acceleration by this novel accelerator.

Kalinin, A.; Berg, J.; Bliss, N. Cox, G.; Dufau, M.; Gallagher, A.; Hill, C.; Jones, J.; Ma, L.; McIntosh, P.; Muratori, B.; Oates, A.; Shepherd B.; Smith, R.; Hock, K.; Holder, D.; Ibison, M., Kirkman I.; Borrell, R.; Crisp, J.; Fellenz, B.; Wendt, M.

2011-09-04

67

A smart diagnostic system for Doppler ultrasonography  

Microsoft Academic Search

This paper proposes an automated diagnostic approach for a Doppler ultrasonography system (DUS) using the spectrogram features and image information. Various boundary and moment features of the spectrogram are fed to a supervised ANN to diagonise the localized arterial condition. This local data is given to a Bayesian probabilistic inferencing engine for end diagnosis. Simultaneously, arterial contour variation in the

B. Das; S. Banerjee

2002-01-01

68

Diagnostic Challenges of Central Nervous System Tuberculosis  

PubMed Central

Central nervous system tuberculosis (TB) was identified in 20 cases of unexplained encephalitis referred to the California Encephalitis Project. Atypical features (encephalitic symptoms, rapid onset, age) and diagnostic challenges (insensitive cerebrospinal fluid [CSF] TB PCR result, elevated CSF glucose levels in patients with diabetes, negative result for tuberculin skin test) complicated diagnosis.

Loeffler, Ann M.; Honarmand, Somayeh; Flood, Jennifer M.; Baxter, Roger; Jacobson, Susan; Alexander, Rick; Glaser, Carol A.

2008-01-01

69

Diagnostic challenges of central nervous system tuberculosis.  

PubMed

Central nervous system tuberculosis (TB) was identified in 20 cases of unexplained encephalitis referred to the California Encephalitis Project. Atypical features (encephalitic symptoms, rapid onset, age) and diagnostic challenges (insensitive cerebrospinal fluid [CSF] TB PCR result, elevated CSF glucose levels in patients with diabetes, negative result for tuberculin skin test) complicated diagnosis. PMID:18760024

Christie, Laura J; Loeffler, Ann M; Honarmand, Somayeh; Flood, Jennifer M; Baxter, Roger; Jacobson, Susan; Alexander, Rick; Glaser, Carol A

2008-09-01

70

An Automatic Diagnostic System for CT Liver Image Classification  

Microsoft Academic Search

Computed tomography (CT) images have been widely used for liver disease diagnosis. Designing and developing computer-assisted image processing techniques to help doctors improve their diagnosis has received considerable interests over the past years. In this paper, a CT liver image diagnostic classification system is presented which will automatically find, extract the CT liver boundary and further classify liver diseases. The

E-Liang Chen; Pau-Choo Chung; Ching-Liang Chen; Hong-Ming Tsai; Chein-I Chang

1998-01-01

71

Diagnostics and Control in the Thermal Spray Process  

SciTech Connect

The plasma-spray process features complex plasma-particle interactions that can result in process variations that limit process repeatability and coating performance. This paper reports our work on the development of real-time diagnostics and control for the plasma spray process. The strategy is to directly monitor and control those degrees of freedom of the process that are observable, controllable and affect resulting coating properties. This includes monitoring of particle velocity and temperature as well as the shape and trajectory of the spray pattern. Diagnostics that have been developed specifically for this purpose are described along with the demonstration of a closed loop process controller based on these measurements.

Fincke, James Russell; Swank, William David; Bewley, Randy Lee; Haggard, Delon C; Gevelber, M.; Wroblewski, D.

2001-12-01

72

Development and application of diagnostic systems to achieve fault tolerance  

SciTech Connect

Much work is currently being done to develop and apply diagnostic systems that are tolerant to faulted conditions in the process being monitored and in the sensors that measure the critical parameters associated with the process. A fault-tolerant diagnostic system based on state-determination, pattern-recognition techniques is currently undergoing testing and evaluation in certain applications at the EBR-II reactor. Testing and operational experience with the system to date has shown a high degree of tolerance to sensor failures, while being sensitive to very slight changes in the plant operational state. This paper briefly mentions related work being done by others, and describes in more detail the pattern-recognition system and the results of the testing and operational experience with the system at EBR-II. 9 refs., 10 figs.

King, R.W.; Singer, R.M.

1989-01-01

73

40 CFR 1033.112 - Emission diagnostics for SCR systems.  

Code of Federal Regulations, 2010 CFR

...2009-07-01 false Emission diagnostics for SCR systems. 1033.112 Section 1033.112 Protection...Requirements § 1033.112 Emission diagnostics for SCR systems. Engines equipped with SCR systems using separate reductant tanks must...

2009-07-01

74

40 CFR 1033.112 - Emission diagnostics for SCR systems.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Emission diagnostics for SCR systems. 1033.112 Section 1033.112 Protection...Requirements § 1033.112 Emission diagnostics for SCR systems. Engines equipped with SCR systems using separate reductant tanks must...

2010-07-01

75

Optical Diagnostic System for the TLS  

SciTech Connect

The Taiwan light source (TLS) uses a photon beam intensity system (Io monitor) to index the electron beam stability. This index combines the information of the fluctuations of electron beam position and size. For understanding the impact of these fluctuations to the electron beam instability, a set of the optical diagnostic system was installed in the TLS BL10 diagnostics beamline. This system includes the photon beam position monitor (PBPM), the beam size monitor (BSM) and the Io monitor. From the result, we concluded that about one-third impact of beam instability came from the fluctuation of electron beam position and about two-thirds impact of beam instability came from the fluctuation of electron beam size. The hardware configuration is described in this paper.

Kuan, C. K.; Tseng, T. C.; Wang, D. J.; Hsiung, G. Y.; Perng, S. Y.; Tsai, Z. D.; Ueng, T. S.; Hsueh, H. P.; Chen, J. R. [National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan (China)

2007-01-19

76

Systems approaches to molecular cancer diagnostics  

PubMed Central

The search for improved molecular cancer diagnostics is a challenge for which systems approaches show great promise. As is becoming increasingly clear, cancer is a perpetually-evolving, highly multi-factorial disease. With next generation sequencing providing an ever-increasing amount of high-throughput data, the need for analytical tools that can provide meaningful context is critical. Systems approaches have demonstrated an ability to separate meaningful signal from noise that arises from population heterogeneity, heterogeneity within and across tumors, and multiple sources of technical variation when sufficient sample sizes are obtained and standardized measurement technologies are used. The ability to develop clinically useful molecular cancer diagnostics will be predicated on advancements on two major fronts: 1) more comprehensive and accurate measurements of multiple endpoints, and 2) more sophisticated analytical tools that synthesize high-throughput data into meaningful reflections of cellular states. To this end, systems approaches that have integrated transcriptomic data onto biomolecular networks have shown promise in their ability to classify tumor subtypes, predict clinical progression, and inform treatment options. Ultimately, the success of systems approaches will be measured by their ability to develop molecular cancer diagnostics through distilling complex, systems-wide information into simple, salient, actionable information.

Ma, Shuyi; Funk, Cory C.; Price, Nathan D.

2011-01-01

77

Cognitive and system factors contributing to diagnostic errors in radiology.  

PubMed

OBJECTIVE. In this article, we describe some of the cognitive and system-based sources of detection and interpretation errors in diagnostic radiology and discuss potential approaches to help reduce misdiagnoses. CONCLUSION. Every radiologist worries about missing a diagnosis or giving a false-positive reading. The retrospective error rate among radiologic examinations is approximately 30%, with real-time errors in daily radiology practice averaging 3-5%. Nearly 75% of all medical malpractice claims against radiologists are related to diagnostic errors. As medical reimbursement trends downward, radiologists attempt to compensate by undertaking additional responsibilities to increase productivity. The increased workload, rising quality expectations, cognitive biases, and poor system factors all contribute to diagnostic errors in radiology. Diagnostic errors are underrecognized and underappreciated in radiology practice. This is due to the inability to obtain reliable national estimates of the impact, the difficulty in evaluating effectiveness of potential interventions, and the poor response to systemwide solutions. Most of our clinical work is executed through type 1 processes to minimize cost, anxiety, and delay; however, type 1 processes are also vulnerable to errors. Instead of trying to completely eliminate cognitive shortcuts that serve us well most of the time, becoming aware of common biases and using metacognitive strategies to mitigate the effects have the potential to create sustainable improvement in diagnostic errors. PMID:23971454

Lee, Cindy S; Nagy, Paul G; Weaver, Sallie J; Newman-Toker, David E

2013-09-01

78

Signal processing methods for MFE plasma diagnostics  

SciTech Connect

The application of various signal processing methods to extract energy storage information from plasma diamagnetism sensors occurring during physics experiments on the Tandom Mirror Experiment-Upgrade (TMX-U) is discussed. We show how these processing techniques can be used to decrease the uncertainty in the corresponding sensor measurements. The algorithms suggested are implemented using SIG, an interactive signal processing package developed at LLNL.

Candy, J.V.; Casper, T.; Kane, R.

1985-02-01

79

Diagnostic Systems for the Ignitor Experiment  

NASA Astrophysics Data System (ADS)

The main purpose of the Ignitor experiment (R01.32 m, a xb0.47x0.83 m ^2, BT<=13 T, Ip<=11 MA) is that of establishing the reactor physics in regimes close to ignition (TeTi11 keV, n010^ 21 m-3). The pulse evolution at the maximum machine parameters is characterized by a ramp-up phase of the plasma current of 4 s and 4 s of flat-top, which allow to reach fully relaxed current profiles. The set of baseline diagnostic systems includes, among others, the advanced neutron spectrometer originally proposed for Ignitor and later adopted on JET, Thomson Scattering, ECE, High Resolution X-ray Spectrometer. A Dispersion-Interferometer operating at 1 ?m instead of the conventional Two-color Interferometer at 10 ?m is being considered for plasma density measurements. The high plasma density and temperature, together with the use of tritium, impose some limitations on diagnostic systems based on NB injection, escaping particles or in direct connection with the high vacumm of the plasma chamber. The high neutron flux is also expected to challenge the systems more directly exposed to it, although the low fluences do not pose particular concerns on material survival. The conceptual design of the main diagnostic systems has been carried out and the present lay-out around the machine is shown.

Bombarda, F.; Giammanco, F.

2011-11-01

80

Experience report with the Alignment Diagnostic System  

SciTech Connect

Since 2009 an Alignment Diagnostic System (ADS) has been operating at the undulator of the new Linac Coherent Light Source at SLAC National Accelerator Laboratory. The undulator spans a distance of 132 meters and is structured into 33 segments. Each segment is equipped with four hydrostatic leveling sensors and four wire position monitors. This report describes the set up and reflects the experience gained with the ADS.

Gassner, Georg; /SLAC

2011-03-03

81

Video profile monitor diagnostic system for GTA  

Microsoft Academic Search

This paper describes a video diagnostic system used to measure the beam profile and position of the Ground Test Accelerator 2.5-MeV H(-) ion beam as it exits the intermediate matching section. Inelastic collisions between H-ions and residual nitrogen in the vacuum chamber cause the nitrogen to fluoresce. The resulting light is captured through transport optics by an intensified CCD camera

D. P. Sandoval; R. C. Garcia; J. D. Gilpatrick; K. F. Johnson; M. A. Shinas; R. Wright; V. Yuan; M. E. Zander

1992-01-01

82

Transient calorimetric diagnostics for plasma processing  

NASA Astrophysics Data System (ADS)

This paper reports on an improvement of the calorimetric method for the determination of energy fluxes from plasma towards substrates by using a transient technique. It provides a short overview of the traditional method used for characterization of plasma-wall-interactions during plasma processing. The mathematical framework of the method and possible implications are discussed. It is shown how the method can be improved to obtain additional and detailed information about the energy influx in a shorter measurement time. For this purpose, the probe bias (if applied), which has commonly been kept constant is varied like in Langmuir probe measurements. The experimental validation of the theoretical considerations emphasizes the potential of the method for control in plasma processing. The possibility how the passive calorimetric probe can be used in continuous measurements for process monitoring without any feedback loops used by other probes, is finally discussed.

Bornholdt, Sven; Kersten, Holger

2013-08-01

83

Advanced plasma diagnostics for plasma processing  

NASA Astrophysics Data System (ADS)

A new, non-intrusive, non-perturbing diagnostic method was developed that can be broadly applied to low pressure, weakly ionized plasmas and glow discharges-trace rare gases optical emission spectroscopy (TRG-OES). The method is based on a comparison of intensities of atomic emission from trace amounts of inert gases (He, Ne, Ar, Kr, and Xe) that are added to the discharge to intensities calculated from the theoretical model. The model assumes a Maxwellian electron energy distribution function (EEDF), computes the population of emitting levels both from the ground state and the metastable states of rare gases, and from the best fit between theory and experiment determines electron temperature (Te). Subject to conditions, TRG-OES can also yield electron density or its upper or lower limit. From the comparison of the emission from levels excited predominantly by high energy electrons to that excited by low energy electrons, information about the EEDF can be obtained. The use of TRG-OES also allows a traditionally qualitative actinometry technique (determination of concentration of radical species in plasma through optical emission) to become a precise quantitative method by including Te and rare gases metastables effects. A combination of TRG-OES, advanced actinometry, and Langmuir probe measurements was applied to several different plasma reactors and regimes of operation. Te measurements and experiments to correct excitation cross section were conducted in a laboratory helical resonator. Two chamber configuration of a commercial (Lam Research) metal etcher were studied to determine the effects of plasma parameters on plasma-induced damage. Two different methods (RF inductive coupling and ultra-high frequency coupling) for generating a plasma in a prototype reactor were also studied. Pulsed plasmas, a potential candidate to eliminate the plasma-induced damage to microelectronics devices that occurs in manufacturing due to differential charging of the wafer, have been studied in a laboratory inductively- coupled reactor. Time dependencies of Te,ne,n+ i,n- i and the transition of the plasma from its electron-ion to ion-ion state (the ion- ion state promises to eliminate the plasma-induced damage) were investigated with a combination of the Langmuir probe, microwave interferometry, and TRG-OES.

Malyshev, Mikhail Victorovich

1999-10-01

84

Development plan for an advanced drilling system with real-time diagnostics (Diagnostics-While-Drilling)  

SciTech Connect

This proposal provides the rationale for an advanced system called Diagnostics-while-drilling (DWD) and describes its benefits, preliminary configuration, and essential characteristics. The central concept is a closed data circuit in which downhole sensors collect information and send it to the surface via a high-speed data link, where it is combined with surface measurements and processed through drilling advisory software. The driller then uses this information to adjust the drilling process, sending control signals back downhole with real-time knowledge of their effects on performance. The report presents background of related previous work, and defines a Program Plan for US Department of Energy (DOE), university, and industry cooperation.

FINGER,JOHN T.; MANSURE,ARTHUR J.; PRAIRIE,MICHAEL R.; GLOWKA,D.A.

2000-02-01

85

A Proposal for an Advanced Drilling System with Real-Time Diagnostics (Diagnostics-While-Drilling)  

SciTech Connect

In this paper, we summarize the rationale for an advanced system called Diagnostics-While-Drilling (DWD) and describe its benefits, preliminary configuration, and essential characteristics. The central concept is a closed data circuit in which downhole sensors collect information and send it to the surface via a high-speed data link, where it is combined with surface measurements and processed through drilling advisory software. The driller then uses this information to adjust the drilling process, sending control signals back downhole with real-time knowledge of their effects on performance. We outline a Program Plan for DOE, university, and industry to cooperate in the development of DWD technology.

Finger, J.T.; Mansure, A.J.; Prairie, M.R.

1999-07-12

86

System for computerized TV iris diagnostics  

NASA Astrophysics Data System (ADS)

Iridodiagnostics, using the information, encoded in human iris, gives an integrated picture of human health, mirroring even preclinic states, genetic peculiarities and predispositions. To decode this information, TV image processing is used for automatic measurement of several diagnostic features, such as pupil ellipticity, pupil flattening, indenteness of the autonomous ring, its minima and maxima parameters, etc. An instrument setup is described for acquiring and processing TV image of an iris. In one of the variants, color image is produced with a black-and-white TV camera due to sequential R-, G-, and B-frames resulting from alternating color pulse illumination. For the sake of classification, sequential methodology was modified, performing multiple tests over the same data and permitting an adaptation in the process of learning.

Molebny, Vasyl V.; Kolomatsky, Yuri; Chumak, Serhi; Vasko, Mykola; Myrhorodska, Tetyana

1993-09-01

87

DEVELOPMENT OF SIGNAL PROCESSING TOOLS AND HARDWARE FOR PIEZOELECTRIC SENSOR DIAGNOSTIC PROCESSES  

SciTech Connect

This paper presents a piezoelectric sensor diagnostic and validation procedure that performs in -situ monitoring of the operational status of piezoelectric (PZT) sensor/actuator arrays used in structural health monitoring (SHM) applications. The validation of the proper function of a sensor/actuator array during operation, is a critical component to a complete and robust SHM system, especially with the large number of active sensors typically involved. The method of this technique used to obtain the health of the PZT transducers is to track their capacitive value, this value manifests in the imaginary part of measured electrical admittance. Degradation of the mechanical/electric properties of a PZT sensor/actuator as well as bonding defects between a PZT patch and a host structure can be identified with the proposed procedure. However, it was found that temperature variations and changes in sensor boundary conditions manifest themselves in similar ways in the measured electrical admittances. Therefore, they examined the effects of temperature variation and sensor boundary conditions on the sensor diagnostic process. The objective of this study is to quantify and classify several key characteristics of temperature change and to develop efficient signal processing techniques to account for those variations in the sensor diagnostis process. In addition, they developed hardware capable of making the necessary measurements to perform the sensor diagnostics and to make impedance-based SHM measurements. The paper concludes with experimental results to demonstrate the effectiveness of the proposed technique.

OVERLY, TIMOTHY G. [Los Alamos National Laboratory; PARK, GYUHAE [Los Alamos National Laboratory; FARRAR, CHARLES R. [Los Alamos National Laboratory

2007-02-09

88

Systematic construction of qualitative physics-based rules for process diagnostics  

SciTech Connect

A novel first-principles-based expert system is proposed for on-line detection and identification of faulty component candidates during incipient off-normal process operations. The system performs function-oriented diagnostics and can be reused for diagnosing single-component failures in different processes and different plants through the provision of the appropriate process schematics information. The function-oriented and process-independent diagnostic features of the proposed expert system are achieved by constructing a knowledge base containing three distinct types of information, qualitative balance equation rules, functional classification of process components, and the process piping and instrumentation diagram. The various types of qualitative balance equation rules for processes utilizing single-phase liquids are derived and their usage is illustrated through simulation results of a realistic process in a nuclear power plant.

Reifman, J.; Wei, T.Y.C.

1995-12-31

89

Video profile monitor diagnostic system for GTA  

SciTech Connect

This paper describes a video diagnostic system used to measure the beam profile and position of the Ground Test Accelerator 2.5-MeV H{sup {minus}} ion beam as it exits the intermediate matching section. Inelastic collisions between H-ions and residual nitrogen to fluoresce. The resulting light is captured through transport optics by an intensified CCD camera and is digitized. Real-time beam-profile images are displayed and stored for detailed analysis. Analyzed data showing resolutions for both position and profile measurements will also be presented.

Sandoval, D.P.; Garcia, R.C.; Gilpatrick, J.D.; Johnson, K.F.; Shinas, M.A.; Wright, R.; Yuan, V.; Zander, M.E.

1992-09-01

90

Video profile monitor diagnostic system for GTA  

SciTech Connect

This paper describes a video diagnostic system used to measure the beam profile and position of the Ground Test Accelerator 2.5-MeV H{sup {minus}} ion beam as it exits the intermediate matching section. Inelastic collisions between H-ions and residual nitrogen to fluoresce. The resulting light is captured through transport optics by an intensified CCD camera and is digitized. Real-time beam-profile images are displayed and stored for detailed analysis. Analyzed data showing resolutions for both position and profile measurements will also be presented.

Sandoval, D.P.; Garcia, R.C.; Gilpatrick, J.D.; Johnson, K.F.; Shinas, M.A.; Wright, R.; Yuan, V.; Zander, M.E.

1992-01-01

91

An automated diagnostic expert system for diesel engines  

SciTech Connect

Fault diagnosis of diesel engines can be a tedious time-consuming process, resulting in extended downtime, thus reducing productivity and increasing operational cost. This problem can be accentuated when experienced expert maintenance personnel are in short supply and also when the rate of development of new-generation engines using leading edge technology does not permit maintenance personnel to keep up with this change. An automated diagnostic system based on artificial intelligence criteria using mechanical signature analyses (MSA) of signals acquired from engine mounted sensors can overcome this problem by providing expert and consistent diagnostic advice. This paper describes the development and implementation of an automated diagnostic expert system for diesel engines. The system uses vibration signals together with oil pressure and temperature, crankcase pressures, exhaust gas temperature and pressure, exhaust emissions, manifold noise levels, inlet manifold pressure, fuel delivery pressure, and instantaneous engine speed to monitor and diagnose engine faults. State-of-the-art techniques used for signal processing to generate data required for effective diagnosis from raw signals acquired form the engine mounted sensors are described. Complexities of signal processing for diesel engines are discussed and solutions of a practical nature suggested. Signal analysis techniques relating to fault condition evaluation are also described.

Autar, R.K. [Univ. of Adelaide, South Australia (Australia). Dept. of Mechanical Engineering

1996-07-01

92

An Expert System Based on Parametric Net to Support Motor Pump Multi-Failure Diagnostic  

Microsoft Academic Search

Early failure detection in motor pumps is an important issue in prediction maintenance. An efficient condition-monitoring\\u000a scheme is capable of providing warning and predicting the faults at early stages. Usually, this task is executed by humans.\\u000a The logical progression of the condition-monitoring technologies is the automation of the diagnostic process. To automate\\u000a the diagnostic process, intelligent diagnostic systems are used.

Flavia Cristina Bernardini; Ana Cristina Bicharra Garcia; Inhaúma Neves Ferraz

2009-01-01

93

A joint diagnostic system for laser-driven shock wave experiments  

NASA Astrophysics Data System (ADS)

A joint diagnostic system was established for the diagnosis of laser-driven shock wave experiments. The system has high temporal resolution (time resolution ~12 ps) and high spatial resolution (spatial resolution ~7 ?m) and fits for diagnostics of the experiment with small sample size and short time physical process. The joint diagnostic system was applied for shock wave measurement on the Shenguang-II laser facility. The passive shock breakout signal and active diagnostic signal were simultaneously obtained. The temporal measurement reliability of the system was verified using a multi-layered target. The experimental results show that the two measurement results were consistent.

Shu, Hua; Fu, Si-Zu; Huang, Xiu-Guang; Dong, Jia-Qin; Fang, Zhi-Heng; Wang, Tao; Ye, Jun-Jian; Xie, Zhi-Yong; Guo, Jia; Zhou, Hua-Zhen

2013-06-01

94

Distributed processing and network of data acquisition and diagnostics control for large helical device (LHD)  

Microsoft Academic Search

The LHD (large helical device) data processing system has been designed in order to deal with the huge amount of diagnostics data of 600?900 MB per 10 s short-pulse experiment. It prepared the first plasma experiment in March 1998. The recent increase of the data mass obliged to adopt the fully distributed system structure which uses multiple data transfer paths

H. Nakanishi; M. Kojima; S. Hidekuma

1999-01-01

95

Automotive fault diagnosis - part II: a distributed agent diagnostic system  

Microsoft Academic Search

For pt.I see Crossman, J.A. et al., ibid., p.1063-75. We describe a novel diagnostic architecture, distributed diagnostics agent system (DDAS), developed for automotive fault diagnosis. The DDAS consists of a vehicle diagnostic agent and a number of signal diagnostic agents, each of which is responsible for the fault diagnosis of one particular signal using either a single or multiple signals,

Yi Lu Murphey; Jacob A. Crossman; ZhiHang Chen; John Cardillo

2003-01-01

96

Racine Feedback and Diagnostic System Users Guide.  

ERIC Educational Resources Information Center

The primary objective of the system is to make the testing process a valuable learning experience for the student and the teacher. The guide gives insight into the application of computerized test scoring and reporting. Information related to preparing test answer sheets, processing the completed answer sheets and a description of the various…

Racine Unified School District 1, WI.

97

Low Current AC Partial Discharge Diagnostic System for Wiring Diagnostics.  

National Technical Information Service (NTIS)

A system and method for detecting partial discharges or arcing in wiring or cables is disclosed. The system employs a high-voltage AC power source to generate a high-voltage, low-current AC waveform, which is propagated through a selected wire, which in t...

J. G. Sarkozi

2004-01-01

98

Computer-based diagnostic monitoring to enhance the human-machine interface of complex processes  

SciTech Connect

There is a growing interest in introducing an automated, on-line, diagnostic monitoring function into the human-machine interfaces (HMIs) or control rooms of complex process plants. The design of such a system should be properly integrated with other HMI systems in the control room, such as the alarms system or the Safety Parameter Display System (SPDS). This paper provides a conceptual foundation for the development of a Plant-wide Diagnostic Monitoring System (PDMS), along with functional requirements for the system and other advanced HMI systems. Insights are presented into the design of an efficient and robust PDMS, which were gained from a critical review of various methodologies developed in the nuclear power industry, the chemical process industry, and the space technological community.

Kim, I.S.

1992-02-01

99

Diagnostic Setup for Characterization of Near-Anode Processes in Hall Thrusters  

SciTech Connect

A diagnostic setup for characterization of near-anode processes in Hall-current plasma thrusters consisting of biased and emissive electrostatic probes, high-precision positioning system and low-noise electronic circuitry was developed and tested. Experimental results show that radial probe insertion does not cause perturbations to the discharge and therefore can be used for accurate near-anode measurements.

L. Dorf; Y. Raitses; N.J. Fisch

2003-09-08

100

A new classification system for lesbians: the Dyke Diagnostic Manual.  

PubMed

There has been a long-standing need for a diagnostic manual that documents the unique pathological behaviors of lesbians. The Dyke Diagnostic Manual (DDM) is meant to supplement mainstream classification systems used to identify problematic behaviors in heterosexuals. This article presents thirteen uniquely lesbian conditions that are nowhere to be found in heterosexist diagnostic systems. The DDM may help to reduce the pain and suffering found in many lesbian relationships where one or both partners are afflicted. PMID:20661801

Eliason, Michele J

2010-01-01

101

MFTF-B plasma-diagnostics-system instrumentation and data-acquisition system  

SciTech Connect

The change of scope for MFTF from a simple mirror to a tandem mirror configuration utilizing thermal barriers has expanded the range of plasma parameters and increased the requirements of the plasma diagnostics system. The instrument set that is needed for start-up operation has been identified and conceptual design work is proceeding. This paper describes the diagnostic instrumentation as presently envisioned for start-up operation, with a summary of the detectors and data channels. Also presented is an overview of the current conceptual design for the Local Control and Data Acquisition System and the Data Processing and Display system. As more detailed design is done, the exact number and nature of instruments may change, but overall, the system described here is one expected to satisfy the requirements for start-up and be expandable to the basic set of diagnostics.

Goerz, D.A.; Lau, N.H.C.; Mead, J.E.; Throop, A.L.

1981-10-21

102

A Benchmark Diagnostic Model Generation System  

Microsoft Academic Search

It is critical to use automated generators for synthetic models and data given the sparsity of benchmark models for empirical analysis and the cost of generating models by hand. We describe an automated generator for benchmark models that is based on using a compositional modeling framework and employs graphical models for the system topology. We propose a three-step process for

Jun Wang; Gregory M. Provan

2010-01-01

103

Chapter 8: The Diagnostic Systems in the FTU  

Microsoft Academic Search

The design of diagnostics for the Frascati Tokamak Upgrade (FTU) is challenging because of the compactness of the machine (8-cm-wide ports) and the low operating temperatures requiring the presence of a cryostat. Nevertheless, a rather complete diagnostic system has been progressively installed. The basic systems include a set of magnetic probes, various visible and ultraviolet spectrometers, electron cyclotron emission (ECE)

O. Tudisco; G. M. Apruzzese; P. Buratti; L. Cantarini; A. Canton; L. Carraro; V. Cocilovo; R. de Angelis; M. de Benedetti; B. Esposito; L. Gabellieri; E. Giovannozzi; G. Granucci; L. A. Grosso; G. Grosso; P. Innocente; H. Kroegler; M. Leigheb; G. Monari; D. Pacella; L. Panaccione; V. Pericoli-Ridolfini; G. Pizzicaroli; S. Podda; M. E. Puiatti; G. Rocchi; A. Sibio; A. Simonetto; P. Smeulders; U. Tartari; N. Tartoni; B. Tilia; M. Valisa; V. Zanza; M. Zerbini

2004-01-01

104

Non-diagnostic intelligent tutoring systems: Teaching without student models  

Microsoft Academic Search

The keystones of traditional intelligent tutoring systems (ITSs) have been complex procedures for student diagnosis and adaptive instruction based on diagnostic data. While some of these systems have been shown to be effective, they are also very expensive to develop. This paper describes another class of ITSs, non-diagnostic ITSs, which do little or no student diagnosis, and concentrate their intelligence

Leo Gugerty

1997-01-01

105

An SSME High Pressure Oxidizer Turbopump diagnostic system using G2 real-time expert system  

NASA Astrophysics Data System (ADS)

An expert system which diagnoses various seal leakage faults in the High Pressure Oxidizer Turbopump of the SSME was developed using G2 real-time expert system. Three major functions of the software were implemented: model-based data generation, real-time expert system reasoning, and real-time input/output communication. This system is proposed as one module of a complete diagnostic system for the SSME. Diagnosis of a fault is defined as the determination of its type, severity, and likelihood. Since fault diagnosis is often accomplished through the use of heuristic human knowledge, an expert system based approach has been adopted as a paradigm to develop this diagnostic system. To implement this approach, a software shell which can be easily programmed to emulate the human decision process, the G2 Real-Time Expert System, was selected. Lessons learned from this implementation are discussed.

Guo, Ten-Huei

106

Diagnostic system for high-voltage electrical components.  

National Technical Information Service (NTIS)

This paper presents an example, indicating system logic and architecture, of a centralized diagnostic system for a modern substation. Detail are provided of the part relevant to the most important functions and operations required: measurements and transd...

C. Masetti

1988-01-01

107

Use of Laser Diodes for Analog Fiber Optic Diagnostics Systems.  

National Technical Information Service (NTIS)

Because the time resolution requirements of experiments at the Nevada Test Site exceed the capabilities of traditional electrical analog cable, fiber optic analog diagnostics systems have become attractive. A number of different instrumentation systems ar...

K. G. Hagans R. E. Haigh H. D. Francis

1988-01-01

108

Cutaneous malignant melanoma: audit of the diagnostic process.  

PubMed Central

The results of a study of the diagnostic process in 202 cutaneous malignant melanomas over a 5-year period in one region are presented. Patient delay of more than 3 months was noted in at least 60% of cases, and delay after presentation was identified in 21% of the case histories. In 12% of the cases an opportunity for earlier diagnosis had been missed. The factors leading to delay in diagnosis are highlighted and the need for the dissemination of information relating to the early stages of the disease is emphasised.

Dunkley, M. P.; Morris, A. M.

1991-01-01

109

Diagnostic test element and process for its production  

US Patent & Trademark Office Database

The invention concerns a process for producing a diagnostic test element for analyzing a body fluid in which a lancing member that can puncture a body part is provided with a collecting channel for body fluid obtained by the puncture, wherein the collecting channel exhibits capillary action, and wherein a sensor member for an optical or electrochemical measurement is connected to the lancing member. According to the invention, the sensor member and the lancing member can be joined together as interlocking connecting components wherein a measuring element of the sensor member is inserted into the collecting channel through an insertion opening of the lancing member.

2011-11-08

110

A methodology for developing physical system fault diagnostic aids  

SciTech Connect

Presented here is our methodology for developing automated aids for diagnosing faults in complex physical systems, e.g. reactor cooling system. We undertook this research at the Pacific Northwest Laboratory (PNL) for the US Department of Energy and the US Nuclear Regulatory Commission. We have designed these aids as multilevel-multiagent diagnostic aids based on principles that should be generally applicable to any complex system. In this methodology, multilevel'' refers to information models described at successive levels of abstraction that are tied together in such a way that reasoning is directed to the appropriate level as determined by the problem solving requirements. The concept of multiagent'' refers to the method of information processing within the multilevel model network; each model network is an independent information processor, i.e., an intelligent agent. 8 refs.

Stratton, R.C.; Jarrell, D.B.

1991-07-01

111

Picture Archiving and Communication Systems: A Systematic Review of Published Studies of Diagnostic Accuracy, Radiology Work Processes, Outcomes of Care, and Cost. Technology Assessment Program. Report No. 5.  

National Technical Information Service (NTIS)

Historically, Veterans Administration (VA) has played a major role in the dissemination of information technology into medicine as part of its coordinated efforts to improve the efficiency and effectiveness of its health care delivery system. To support t...

D. Anderson K. Flynn E. Alligood

1997-01-01

112

Computer diagnostic of cardiovascular system development experience and prospects  

Microsoft Academic Search

The paper addresses a number of problems solved in the design of computer systems for functional diagnostics, in particular - the synthesis and restoration of electrocardiographic leads, fetal electrocardiogram separation and analysis during abdominal cardiography, the development of telemedicine and personal diagnostic devices.

A. Zelensky; V. Sharonov; V. Shulgin

2010-01-01

113

Alignment and diagnostics of the National Ignition Facility laser system  

Microsoft Academic Search

The NIF laser system will be capable of delivering 1.8 MJ of 351 nm energy in 192 beams. Diagnostics instruments must measure beam energy, power vs. time, wavefront quality, and beam intensity proifle to characterize laser performance. Alignment and beam diagnostics are also used to set the laser up for the high power shots and to isolate problems when performance

Robert D. Boyd; Erlan S. Bliss; Steven J. Boege; Robert D. Demaret; Mark Feldman; Alan J. Gates; Fred R. Holdener; J. Hollis; Carl F. Knopp; Tom J. McCarville; Victoria J. Miller-Kamm; W. E. Rivera; J. Thaddeus Salmon; J. R. Severyn; Calvin E. Thompson; David Y. Wang; Richard A. Zacharias

1999-01-01

114

Target diagnostic system for the National Ignition Facility (NIF)  

SciTech Connect

A review of recent progress on the design of a diagnostic system proposed for ignition target experiments on the National Ignition Facility (NIF) will be presented. This diagnostic package contains an extensive suite of optical, x-ray, gamma-ray, and neutron diagnostics that enable measurements of the performance of both direct and indirect driven NIF targets. The philosophy used in designing all of the diagnostics in the set has emphasized redundant and independent measurement of fundamental physical quantities relevant to the operation of the NIF target. A unique feature of these diagnostics is that they are being designed to be capable of operating, in the high radiation, EMP, and debris backgrounds expected on the NIF facility. The diagnostic system proposed can be categorized into three broad areas: laser characterization, hohlraum characterization, and capsule performance diagnostics. The operating principles of a representative instrument from each class of diagnostic employed in this package will be summarized and illustrated with data obtained in recent prototype diagnostic tests.

Leeper, R.J.; Chandler, G.A.; Cooper, G.W.; Derzon, M.S. [and others

1996-07-01

115

Technology update II: Wire systems diagnostics & prognostics  

Microsoft Academic Search

The Aviation industry is gradually realizing some of the benefits from wire husbandry as they include it in their maintenance programs. Individual operators are also beginning to incorporate both zonal visual inspection procedures and advanced diagnostic tooling practices into their maintenance programs. Visual inspection, although only 25% effective is being used to check for wire contamination, combustibles and wire degradation

Christopher Teal; Bill Larsen

2003-01-01

116

Case-functional-based diagnostic system (CFDS)  

Microsoft Academic Search

Recently, the functional representation approach has become a growing subarea of the model-based diagnostic approaches. It provides efficient mechanisms for diagnosing new faults. Sometimes, it suffers from computational complexity when repeating the same mechanism for old faults. Its performance can be improved by using a learning approach to avoid this repetition. It is found that the case-based reasoning approach performs

A. H Mohamed; F. A Mohamed; A. M Nassar; M. H El-Fouly

2002-01-01

117

Controllable optical emission spectroscopy plasma diagnostic system  

Microsoft Academic Search

Optical emission spectroscopy (OES) does not always produce signals useful for plasma diagnostics, including endpoint detection. Fluctuations in plasma power or deposition on walls, cause the OES signal to drift. To overcome such shortcomings, we have developed a method and tool that allows independent control of both electron energy (Ee) and density (ne). A description of the method and resulting

P. L. Stephan Thamban; Jimmy Hosch; Daniel Self; Matthew Goeckner

2008-01-01

118

An integrated diagnostic support system approach to fault isolation in the operational environment  

Microsoft Academic Search

The US Navy Integrated Diagnostic Support System (IDSS) program is developing software tools required for a systems-engineering approach to providing an improved fault-isolation capability for the operational-level maintenance technician. The success of the diagnostic process is seen to depend on the use of testable designs, development of test procedures based on the optimum design, authoring of the execution software, and

James L. Cigler

1989-01-01

119

Quantitative Evaluation of the Diagnostic Thinking Process in Medical Students  

PubMed Central

OBJECTIVE To explore the diagnostic thinking process of medical students. SUBJECTS AND METHODS Two hundred twenty-four medical students were presented with 3 clinical scenarios corresponding to high, low, and intermediate pre-test probability of coronary artery disease. Estimates of test characteristics of the exercise stress test, and pre-test and post-test probability for each scenario were elicited from the students (intuitive estimates) and from the literature (reference estimates). Post-test probabilities were calculated using Bayes' theorem based upon the intuitive estimates (Bayesian estimates of post-test probability) and upon the reference estimates (reference estimates of post-test probability). The differences between the reference estimates and the intuitive estimates, and between Bayesian estimates and the intuitive estimates were used for assessing knowledge of test characteristics, and ability of estimating pre-test and post-test probability of disease. RESULTS Medical students could not rule out disease in low or intermediate pre-test probability settings, mainly because of poor pre-test estimates of disease probability. They were also easily confused by test results that differed from their anticipated results, probably because of their inaptitude in applying Bayes' theorem to real clinical situations. These diagnostic thinking patterns account for medical students or novice physicians repeating unnecessary examinations. CONCLUSIONS Medical students' diagnostic ability may be enhanced by the following educational strategies: 1) emphasizing the importance of ruling out disease in clinical practice, 2) training in the estimation of pre-test disease probability based upon history and physical examination, and 3) incorporation of the Bayesian probabilistic thinking and its application to real clinical situations.

Noguchi, Yoshinori; Matsui, Kunihiko; Imura, Hiroshi; Kiyota, Masatomo; Fukui, Tuguya

2002-01-01

120

Diagnostic information models: a practical approach to verticality, fault accountability, and diagnostic maturation of hierarchical systems  

Microsoft Academic Search

Modular testing and assembly is common for most high technology equipment such as military avionics systems. Systems that have several levels of testing and assembly are susceptible to the diagnostic condition of ReTest OK (RTOK) or Can Not Duplicate (CND). This paper presents a modeling approach to reduce the number of RTOKs and CNDs by focusing on fault accountability and

Steven A. Wegener

1996-01-01

121

A hybrid piezoelectric/fiber optic diagnostic system for structural health monitoring  

NASA Astrophysics Data System (ADS)

A hybrid piezoelectric/fiber optic diagnostic system has been developed for quick non-destructive evaluation and long term health monitoring of aerospace vehicles and structures. The hybrid diagnostic system uses piezoelectric actuators to input a controlled excitation to the structure and fiber optic sensors to capture the corresponding structural response. The system consists of three major parts: a diagnostic layer with a network of piezoelectric elements and fiber gratings to offer a simple and efficient way to integrate a large network of transducers onto a structure; diagnostic hardware consisting of an arbitrary waveform generator and a high speed fiber grating demodulation unit together with a high speed data acquisition card to provide actuation input, data collection, and information processing; and diagnostic software to determine the condition of the structure. This paper presents key development issues related to the manufacturing of the hybrid piezoelectric/fiber optic diagnostic layer and integration of a highly portable diagnostic hardware. Validation and proof testing of this integrated diagnostic system are also presented.

Qing, Xinlin; Kumar, Amrita; Zhang, Chang; Gonzalez, Ignacio F.; Guo, Guangping; Chang, Fu-Kuo

2005-06-01

122

Target Diagnostic Control System Implementation for the National Ignition Facility  

SciTech Connect

The extreme physics of targets shocked by NIF's 192-beam laser are observed by a diverse suite of diagnostics. Many diagnostics are being developed by collaborators at other sites, but ad hoc controls could lead to unreliable and costly operations. A Diagnostic Control System (DCS) framework for both hardware and software facilitates development and eases integration. Each complex diagnostic typically uses an ensemble of electronic instruments attached to sensors, digitizers, cameras, and other devices. In the DCS architecture each instrument is interfaced to a low-cost Windows XP processor and Java application. Each instrument is aggregated with others as needed in the supervisory system to form an integrated diagnostic. The Java framework provides data management, control services and operator GUI generation. DCS instruments are reusable by replication with reconfiguration for specific diagnostics in XML. Advantages include minimal application code, easy testing, and high reliability. Collaborators save costs by assembling diagnostics with existing DCS instruments. This talk discusses target diagnostic instrumentation used on NIF and presents the DCS architecture and framework.

Shelton, R T; Kamperschroer, J H; Lagin, L J; Nelson, J R; O'Brien, D W

2010-05-12

123

Benchmarking Diagnostic Algorithms on an Electrical Power System Testbed.  

National Technical Information Service (NTIS)

Diagnostic algorithms (DAs) are key to enabling automated health management. These algorithms are designed to detect and isolate anomalies of either a component or the whole system based on observations received from sensors. In recent years a wide range ...

D. Garcia S. Narasimhan S. Poll S. Wright T. Kurtoglu

2009-01-01

124

Optical Diagnostic System for Solar Sails: Phase 1 Final Report.  

National Technical Information Service (NTIS)

A solar sail diagnostics system has a number of potential uses, including: (1) Determining whether the solar sail is configured and behaving as models predict; (2) Answering questions that cannot be confidently answered without a flight test; (3) Collecti...

R. S. Pappa J. R. Blandino D. W. Caldwell J. A. Carroll

2004-01-01

125

40 CFR 1033.112 - Emission diagnostics for SCR systems.  

Code of Federal Regulations, 2013 CFR

...diagnostic system must monitor reductant quality and tank levels and alert operators to the need to refill the reductant tank before...meet your concentration specifications. Unless we approve other alerts, use a malfunction-indicator light (MIL) as...

2013-07-01

126

INTEGRATION OF ARTIFICIAL INTELLIGENCE SYSTEMS FOR NUCLEAR POWER PLANT SURVEILLANCE AND DIAGNOSTICS  

Microsoft Academic Search

The objective of this program is to design, construct operate, test, and evaluate a prototype integrated monitoring and diagnostic system for a nuclear power plant. It is anticipated that this technology will have wide application to other complex systems (e.g., fossil power plants, chemical processing plants, and possibly air traffic control systems). Over the past decade, the University of Tennessee

Robert E. Uhrig; J. Wesley Hines; William R. Nelson

127

QUAWDS: A Composite Diagnostic System for Gait Analysis  

PubMed Central

QUAWDS is a system for analyzing human gait. QUAWDS integrates associational and qualitative models of knowledge into a diagnostic system, taking advantage of the tasks each kind of model can determine efficiently and effectively. An abductive assembler is used to coordinate the different models. The result is a diagnostic solution that is “locally best,” i.e, no single change to the answer will produce a better solution. We believe QUAWDS' architecture is suitable for many complex domains.

Weintraub, Michael A.; Bylander, Tom

1989-01-01

128

Comparison of electro-optic diagnostic systems  

SciTech Connect

We have examined the component devices used in electro-optic transient recording systems and studied their contributions to system noise levels. This work includes the investigation of three system configurations: a 1300-nm laser diode system, an 810-nm Mach-Zehnder system, and a 1300-nm hybrid system. As a result of our work, we have developed a method of analysis for determining the theoretical noise sources in electro-optic transient recording systems. 1 ref., 2 figs., 1 tab.

Hagans, K.G.; Sargis, P.D.

1990-01-01

129

GIS diagnostics: thermal imaging systems used for poor contact detection  

NASA Astrophysics Data System (ADS)

The reliability of GIS is very high but any failure that occurs can cause extensive damage result and the repair times are considerably long. The consequential losses to system security and economically can be high, especially if the nominal GIS voltage is 420 kV and above. In view of these circumstances, increasing attention is being given to diagnostic techniques for in-service maintenance undertaken to improve the reliability and availability of GIS. Recently considerable progress has been made in diagnostic techniques and they are now used successfully during the service life of the equipment. These diagnostic techniques in general focus on the GIS insulation system and are based on partial discharge (PD) measurements in GIS. There are three main methods for in-service PD detection in GIS: - the chemical method that rely on the detection of cracked gas caused by PD, the acoustic method designed to detect the acoustic emission excited by PD, and, the electrical method which is based on detection of electrical resonance at ultra high frequencies (UHF) up to 1.5 GHz caused by PD excitation in GIS chambers (UHF method). These three dielectric diagnostic methods cannot be used for the detection of poor current carrying contacts in GIS. This problem does not always produce partial discharges and at early stages it does not cause gas cracking. An interesting solution to use two techniques - the current unbalance alarm scheme and partial discharge monitoring was advised by A. Salinas from South California Edison Co. Unfortunately this way is complicated and very expensive. The investigations performed in Japan on standing alone SF6 breaker showed that joule heating of the contact accompanied by released power of 1600 Watt produce temperature difference on the enclosure up to 7 degrees centigrade that could be detected by infra-red Thermal Imaging System. According to CIGRE Joint Working Group 33/23.12 Report, 11% of all GIS failures are due to poor current carrying contacts in GIS. The Israel Electric Company (IEC) in seeking a solution to this problem have undertaken experimental work to examine the possibility of in-service diagnostic of poor contact problem in GIS via direct local heating detection, using a Thermal Imaging System. The experiments were carried out on the part of the GIS with nominal SF6 pressure. The following aspects of the problem were examined: - the range of power released in the defective contact that could give the practical temperature rise on the surface of enclosure; - temperature distribution on the surface of enclosure; - the influence of spacer type (with holes or without) on the heat transfer process; - the influence of the length of SF6 tubes and there position (horizontal or vertical); - the temperature difference between upper and lower parts of the tubes in horizontal position; - practical use of the Thermal Imaging System for detecting poor contact problem in GIS.

Avital, Doron; Brandenbursky, V.; Farber, A.

2004-04-01

130

System fault diagnostics using fault tree analysis  

Microsoft Academic Search

Over the last 50 years advances in technology have led to an increase in the complexity and sophistication of systems. More complex systems can be harder to maintain and the root cause of a fault more difficult to isolate. Down-time resulting from a system failure can be dangerous or expensive depending on the type of system. In aircraft systems the

E. E. Hurdle; L. M. Bartlett; J. D. Andrews

2008-01-01

131

A Diagnostic System for Air Brakes in Commercial Vehicles  

Microsoft Academic Search

The safe operation of vehicles on roads depends, among other things, on a properly functioning brake system. Air brake systems are widely used in commercial vehicles such as trucks, tractor-trailers, and buses. In these brake systems, compressed air is used as the energy transmitting medium to actuate the foundation brakes mounted on the axles. In this paper, a model-based diagnostic

Shankar C. Subramanian; Swaroop Darbha; K. R. Rajagopal

2006-01-01

132

Direct thermal hard copy system for medical diagnostic applications  

NASA Astrophysics Data System (ADS)

A new dry system based on a direct thermal technology with diagnostic properties has been developed. This paper discusses the major improvements in printer and film required to achieve the image quality needed to meet the diagnostic requirements. The concept of the printer and the film rate both explained. The image quality achieved in terms of contrast, resolution, noise and other parameters is discussed. The results of archivability and shelf life testing and the physical properties of the material are also presented. To validate the technology for diagnostic purposes, a hospital test has been performed for ultrasound, CT, MRI, R and F and vascular studies. The method and results of this testing are presented in the paper. The hospital tests showed that the images obtained with the dry system materials can be used for diagnostic purposes.

de Langhe, Dirk; de Clerck, Marc; Kaerts, Erik; Horsten, Bart; Defieuw, Geert; Borremans, Karel

1997-05-01

133

Development of an Instructional Information System Prototype for Use in the Teaching and Development of Nursing Diagnostic Skills  

PubMed Central

An interdisciplinary project was instituted in 1986 for the development and testing of an instructional system to be used in a nursing curriculum for teaching and developing the diagnostic skills of undergraduate nursing students. The system serves two major functions: to assist students in learning and becoming proficient in the diagnostic process and to assist educators in evaluating the students' learning.

Bloom, K. C.; Leitner, J. E.; Solano, J. L.

1988-01-01

134

Development of an integrated pellet diagnostic system for fueling pellets  

SciTech Connect

We developed a new diagnostic system of the hydrogen ice pellets for fueling into plasma devices. The system consists of three parts. They are: a light gate system, a microwave mass detector, and a shadowgraph system. This system provides the pellet velocity, mass and shape, simultaneously. In particular, by using multiple mirror system, the light gate system can achieve high detective probability with high signal to noise ratio for submillimeter pellets. At the results of the bench tests carried out on GAMMA 10 and the Large Helical Device, the light gate system completely detected the pellets used in the bench tests and the pellet velocity was estimated by using this system. Similarly, the shadowgraph system was available for the pellet. The microwave mass detector was found to be applicable. These results show the capability of simultaneous measurement of the pellet parameters using this diagnostic system.

Kubota, Y.; Yoshikawa, M.; Nakashima, Y.; Yamada, H.; Sakamoto, R. [Plasma Research Center, University of Tsukuba, Ibaraki 305-8577 (Japan); National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)

2004-10-01

135

Neural network based diagnostic system for accident management in nuclear power plants  

Microsoft Academic Search

An artificial neural network (ANN) based diagnostic system for identification of large break loss of coolant accident (LOCA) transients in nuclear power plants (NPPs) has been developed. This is an operator support system which assists the operator in identifying a transient quickly using ANNs. A large database of transient (LOCA) analyses of reactor process parameters has been generated for reactor

Santhosh; M. Kumar; I. Thangamani; D. Mukhopadhyay; V. Verma; V. V. S. S. Rao; K. K. Vaze; A. K. Ghosh

2010-01-01

136

Development of a New Diagnostic System for Human Liver Diseases Based on Conventional Ultrasonic Diagnostic Equipment  

NASA Astrophysics Data System (ADS)

In this paper, the authors present the experimental results of using a quantitative ultrasonic diagnosis technique for human liver diseases using the fractal dimension (FD) of the shape of the power spectra (PS) of RF signals. We have developed an experimental system based on a conventional ultrasonic diagnostic system. As a result, we show that normal livers, fatty livers and liver cirrhosis can be identified using the FD values.

Kikuchi, Tsuneo; Nakazawa, Toshihiro; Harada, Akimitsu; Sato, Hiroaki; Maruyama, Yukio; Sato, Sojun

2001-05-01

137

Electron cyclotron resonant heating (ECRH) diagnostic system on TMX  

SciTech Connect

The ECRH diagnostics system monitors the net power delivered to the plasma by four 200-kW gyrotron oscillators, the frequency of each gyrotron, and some operating parameters of the gyrotron power supply system. The combination CAMAC- and GPIB-based data acquisition system is under desktop computer control that provides the capability for data conversion and display. The data acquisition system is also interfaced to the main computer system that acquires and archives the data.

Coffield, F.E.; Griffin, D.H.

1981-10-20

138

Multicomputer digital processing system  

Microsoft Academic Search

This patent describes a data processing system. It comprises: a first bus; at least two second buses; an input\\/output bus; a testbus with lines for the serial transfer of information; a plurality of computer units connected to the second buses; a first bus control unit; at least one first bus access unit; and a system monitor including processing means for

M. N. Matelan; T. G. Leete; L. Zsohar; M. K. Blanchard; A. Naeini; J. Hsu; D. K. Smith

1989-01-01

139

Diagnostic Systems on the Pegasus Toroidal Experiment  

NASA Astrophysics Data System (ADS)

Measurement capabilities for the Pegasus ST are increasing to support the scientific studies of plasma behavior at very-low A. Global parameters are obtained from equilibrium reconstructions constrained by a magnetics set consisting of internal and external flux loops, a poloidal array of B-dot coils, and a diamagnetic loop. Pulse height analysis using a CCD detector will give a time-resolved electron temperature profile with a shotwise spatial scan. A tangentially viewing bolometer array measures profiles of radiated power. A 280 GHz single-chord microwave interferometer is used to measure line-averaged density, while a CCD-based visible bremsstrahlung array gives an approximate density profile. SPRED provides an impurity spectrum between 10-110 nm at 5 kHz. MHD activity is characterized by Mirnov coil arrays and an 18 channel poloidal soft x-ray array. The proposed next generation of diagnostics includes time-evolving density, temperature and current profiles using active neutral beam spectroscopy.

Diem, S. J.; Fonck, R. J.; Ford, B. A.; Garstka, G. D.; Khripin, K. Y.; Lewicki, B. T.; Ostrander, C. N.; Reinke, M. L.; Schooff, R. J.; Sontag, A. C.; Winz, G. R.

2002-11-01

140

Construction Methodology for a Remote Ultrasound Diagnostic System  

Microsoft Academic Search

In the present paper, we describe a method for constructing a remote ultrasound diagnostic system. Remote diagnosis can be realized using a communication network. We have developed a master-slave type remote medical system to diagnose shoulder diseases, such as dialysis-related amyloid arthropathy (DRAA), by ultrasonographic images. Proper positioning, orientation, and contact force between the ultrasound probe and the affected area

Norihiro Koizumi; Shin'ichi Warisawa; Mitsuru Nagoshi; Hiroyuki Hashizume; Mamoru Mitsuishi

2009-01-01

141

Electrically heated particulate filter diagnostic systems and methods  

DOEpatents

A system that diagnoses regeneration of an electrically heated particulate filter is provided. The system generally includes a grid module that diagnoses a fault of the grid based on at least one of a current signal and a voltage signal. A diagnostic module at least one of sets a fault status and generates a warning signal based on the fault of the grid.

Gonze, Eugene V [Pinckney, MI

2009-09-29

142

Integrated real-time fracture-diagnostics instrumentation system  

SciTech Connect

The use of an integrated, real-time fracture-diagnostics instrumentation system for the control of the fracturing treatment during massive hydraulic fracturing is proposed. The proposed system consists of four subsystems: an internal-fracture-pressure measurement system, a fluid-flow measurement system, a borehole seismic system, and a surface-electric-potential measurement system. This use of borehole seismic and surface-electric-potential measurements, which are essentially away-from-the-wellbore measurements, in conjunction with the use of the more commonly used types of measurements, i.e., at-the-wellbore pressure and fluid-flow measurements, is a distinctive feature of the composite real-time diagnostics system. Currently, the real-time capabilities of the individual subsystems are being developed, and the problems associated with their integration into a complete, computer-linked instrumentation system are being addressed. 2 figures.

Engi, D

1983-01-01

143

Machine Tool Dynamic Measurements and Diagnostic System.  

National Technical Information Service (NTIS)

Vibrations in machine tools, commonly known as chatter, often are the cause for poor machining operations and breakdown of machinery. A state-of-the-art measurement and analysis system was designed, fabricated, and implemented. The system performs real-ti...

R. K. Wharton T. P. Vincent

1989-01-01

144

Gaussian optics lens antenna (GOLA) system for plasma diagnostics  

Microsoft Academic Search

A Gaussian optics lens antenna system has been designed, fabricated and tested for the plasma diagnostic systems on the Aditya Tokamak. The performance of the designed antenna system is compared with our own designed conventional conical horn antenna in Ka-band spectrum. A gain improvement of 11 dB has been achieved in GOLA system, having gain about 33 dB and half

N. Y. Joshi; H. K. B. Pandya; P. K. Atrey; S. K. Pathak

2008-01-01

145

Diagnostic neutral beam injector and associated diagnostic systems for the TJ-II stellarator device  

SciTech Connect

A diagnostic neutral beam injector, based on the DINA-5F injector, is under development for the highly flexible TJ-II stellarator. The principal goals are to obtain spatially resolved charge-exchange recombination spectroscopy and neutral particle analysis measurements along the plasma minor radius and to stimulate opportunities for new physics studies. We first summarize relevant TJ-II characteristics and the considerations addressed when defining this compact system, for instance, the steps taken to minimize the impact of ferromagnetic shielding on magnetic configurations. We then outline the main aspects of the system and associated diagnostics. In particular, we highlight a bidirectional fiber-optic based multichannel spectrometer for obtaining Doppler measurements with high spatial resolution.

McCarthy, K.J.; Balbin, R.; Lopez-Fraguas, A.; Garcia, A.; Carmona, J. M.; Sanchez, J.; Ivanov, A.A. [Laboratorio Nacional de Fusion, CIEMAT, Madrid (Spain); Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)

2004-10-01

146

An ANS based helicopter transmission diagnostic system  

Microsoft Academic Search

From the development effort for the CH-46 Helicopter Aft Transmission Fault Detector project the following can be concluded. The optimized-entropy training algorithm, successfully configured and optimized an ANS for processing vibration signals, albeit test signals from a test stand transmission with implanted faults. The ANS successfully analyzed the test data with, no false alarms, no failures to detect, and no

X. Xu; H. Vanderveldt; R. Allen

1997-01-01

147

Industrial process surveillance system  

DOEpatents

A system and method are disclosed for monitoring an industrial process and/or industrial data source. The system includes generating time varying data from industrial data sources, processing the data to obtain time correlation of the data, determining the range of data, determining learned states of normal operation and using these states to generate expected values, comparing the expected values to current actual values to identify a current state of the process closest to a learned, normal state; generating a set of modeled data, and processing the modeled data to identify a data pattern and generating an alarm upon detecting a deviation from normalcy. 96 figs.

Gross, K.C.; Wegerich, S.W.; Singer, R.M.; Mott, J.E.

1998-06-09

148

The oral-systemic connection: role of salivary diagnostics  

NASA Astrophysics Data System (ADS)

Utilizing saliva instead of blood for diagnosis of both local and systemic health is a rapidly emerging field. Recognition of oral-systemic interrelationships for many diseases has fostered collaborations between medicine and dentistry, and many of these collaborations rely on salivary diagnostics. The oral cavity is easily accessed and contains most of the analytes present in blood. Saliva and mucosal transudate are generally utilized for oral diagnostics, but gingival crevicular fluid, buccal swabs, dental plaque and volatiles may also be useful depending on the analyte being studied. Examples of point-of-care devices capable of detecting HIV, TB, and Malaria targets are being developed and discussed in this overview.

Malamud, Daniel

2013-05-01

149

Progress of development of Thomson scattering diagnostic system on COMPASS  

NASA Astrophysics Data System (ADS)

A new Thomson scattering diagnostic system has been designed and is being built now on the COMPASS tokamak at the Institute of Plasma Physics ASCR in Prague (IPP Prague) in the Czech Republic. This contribution focuses on design, development, and installation of the light collection and detection system. High spatial resolution of 3 mm will be achieved by a combination of design of collection optics and connected polychromators. Imaging characteristics of both core and edge plasma collection objectives are described and fiber backplane design is presented. Several calibration procedures are discussed. The operational deployment of the Thomson scattering diagnostic is planned by the end of 2010.

Bilkova, P.; Melich, R.; Aftanas, M.; Böhm, P.; Sestak, D.; Jares, D.; Weinzettl, V.; Stöckel, J.; Hron, M.; Panek, R.; Scannell, R.; Walsh, M. J.

2010-10-01

150

Ultrasonic Diagnostic Technique Utilizing Switched Gain Signal Processing.  

National Technical Information Service (NTIS)

The patent application discloses an ultrasonic diagnostic technique utilized to determine the wall thickness of cardiac structures. In a preferred embodiment, the endocardial and epicardial surfaces of the left ventricular posterior wall are irradiated wi...

J. M. Griffith W. L. Henry

1975-01-01

151

EARSEC SAR processing system  

NASA Astrophysics Data System (ADS)

Traditionally, the production of high quality Synthetic Aperture Radar imagery has been an area where a potential user would have to expend large amounts of money in either the bespoke development of a processing chain dedicated to his requirements or in the purchase of a dedicated hardware platform adapted using accelerator boards and enhanced memory management. Whichever option the user adopted there were limitations based on the desire for a realistic throughput in data load and time. The user had a choice, made early in the purchase, for either a system that adopted innovative algorithmic manipulation, to limit the processing time of the purchase of expensive hardware. The former limits the quality of the product, while the latter excludes the user from any visibility into the processing chain. Clearly there was a need for a SAR processing architecture that gave the user a choice into the methodology to be adopted for a particular processing sequence, allowing him to decide on either a quick (lower quality) product or a detailed slower (high quality) product, without having to change the algorithmic base of his processor or the hardware platform. The European Commission, through the Advanced Techniques unit of the Joint Research Centre (JRC) Institute for Remote Sensing at Ispra in Italy, realizing the limitations on current processing abilities, initiated its own program to build airborne SAR and Electro-Optical (EO) sensor systems. This program is called the European Airborne Remote Sensing Capabilities (EARSEC) program. This paper describes the processing system developed for the airborne SAR sensor system. The paper considers the requirements for the system and the design of the EARSEC Airborne SAR Processing System. It highlights the development of an open SAR processing architecture where users have full access to intermediate products that arise from each of the major processing stages. It also describes the main processing stages in the overall architecture and illustrates the results of each of the key stages in the processor.

Protheroe, Mark; Sloggett, David R.; Sieber, Alois J.

1994-12-01

152

A Diagnostic Approach to Weapon System Lifecycle Support: The Phalanx Close-in Weapon System  

Microsoft Academic Search

This study discusses a diagnostic approach to examining the lifecycle support system of a weapon system—specifically illustrating the approaches for the US Navy Phalanx Close- in Weapon System (CIWS). The study gauges the status of current readiness and analyzes a snapshot of cost structures. The study identifies the program's influential cost factors and system performance drivers. As a diagnostic approach

Aruna Apte; Rene Rendon

153

Diagnostic system monitors gearboxes at hydro plant  

SciTech Connect

This article describes how, by applying real-time, tooth-by-tooth vibration ``imaging,`` this system detects gear-tooth defects -- such as pitting and cracking. To keep Swan Falls hydroelectric generating station in service, Idaho Power Co constructed a new two-unit, open-pit-turbine powerhouse. Swan Falls, Kuna, Idaho, the oldest on the Snake River, services southern Idaho and parts of Oregon -- one of 17 hydroelectric plants maintained by the utility. The hydro units use speed increasers (gearboxes) so higher-speed generators are possible. To monitor these gearboxes, engineers at Swan Falls required a continuous on-line predictive maintenance system. The system monitors the planetary step-up gearboxes in the two main 12.5-MW pit turbine/generators. In some Idaho Power plants with a similar hydro turbine/generator design, the gearboxes have experienced major failures, leading to hundreds of thousands of dollars in collateral damage.

NONE

1995-06-01

154

A large distributed digital camera system for accelerator beam diagnostics  

SciTech Connect

Optical diagnostics, providing images of accelerated particle beams using radiation emitted by particles impinging a radiator, typically a fluorescent screen, has been extensively used, especially on electron linacs, since the 1970's. Higher intensity beams available in the last decade allow extending the use of beam imaging techniques to perform precise measurements of important beam parameters such as emittance, energy, and energy spread using optical transition radiation (OTR). OTR-based diagnostics systems are extensively used on the superconducting TESLA Test Facility (TTF) linac driving the vacuum ultraviolet free electron laser (VUV-FEL) at the Deutsches Elektronen-Synchrotron facility. Up to 30 optical diagnostic stations have been installed at various positions along the 250-m-long linac, each equipped with a high-performance digital camera. This paper describes the new approach to the design of the hardware and software setups required by the complex topology of such a distributed camera system.

Catani, L.; Cianchi, A.; Di Pirro, G.; Honkavaara, K. [Istituto Nazionale Fisica Nucleare (INFN)-Roma2, Via della Ricerca Scientifica 1, Rome (Italy); Istituto Nazionale Fisica Nucleare-Laboratori Nazionali di Frascati (INFN-LNF), Via Enrico Fermi 40, Frascati (Italy); Deutsches Elektronen-Synchrotron (DESY), 22 603 Hamburg (Germany)

2005-07-15

155

A large distributed digital camera system for accelerator beam diagnostics  

NASA Astrophysics Data System (ADS)

Optical diagnostics, providing images of accelerated particle beams using radiation emitted by particles impinging a radiator, typically a fluorescent screen, has been extensively used, especially on electron linacs, since the 1970's. Higher intensity beams available in the last decade allow extending the use of beam imaging techniques to perform precise measurements of important beam parameters such as emittance, energy, and energy spread using optical transition radiation (OTR). OTR-based diagnostics systems are extensively used on the superconducting TESLA Test Facility (TTF) linac driving the vacuum ultraviolet free electron laser (VUV-FEL) at the Deutsches Elektronen-Synchrotron facility. Up to 30 optical diagnostic stations have been installed at various positions along the 250-m-long linac, each equipped with a high-performance digital camera. This paper describes the new approach to the design of the hardware and software setups required by the complex topology of such a distributed camera system.

Catani, L.; Cianchi, A.; di Pirro, G.; Honkavaara, K.

2005-07-01

156

Remote Diagnostics for Data Acquisition Systems  

Microsoft Academic Search

This paper overviews research being conducted at IRIS in the field of data acquisition for motorsport applications. The research is part of a collaboration between IRIS, the Cooperative Research Centre (CRC) for Intelligent Manufacturing Systems and Technologies (IMST) and an industrial sponsor, Motec Pty. Ltd. The research commenced on June 2001 and the expected completion date is June 2003. The

Stephen Beasley; Choon Ng; Dario Toncich; Andrew Dennison

157

STEAM AND CONDENSATE DIAGNOSTIC EXPERT SYSTEM  

Microsoft Academic Search

This paper describes the outcome of a collaborative project to develop an operational expert system prototype that will help mill operators and engineers to troubleshoot and optimize the steam and condensate portion of paper machine dryer sections. The functionality of the prototype and results of mill validation tests are described.

R. Amyot; J. Gowing; R. Wylie; R. Henzell; J. Futcher; J. Reinsborough; A. Coderre; P. Henzell; O. Vadas

1995-01-01

158

REDEX - The ranging equipment diagnostic expert system  

Microsoft Academic Search

REDEX, an advanced prototype expert system that diagnoses hardware failures in the Ranging Equipment (RE) at NASA's Ground Network tracking stations is described. REDEX will help the RE technician identify faulty circuit cards or modules that must be replaced, and thereby reduce troubleshooting time. It features a highly graphical user interface that uses color block diagrams and layout diagrams to

Edward C. Luczak; K. Gopalakrishnan; David J. Zillig

1989-01-01

159

Diagnostic test systems canister weld joint analysis  

Microsoft Academic Search

The Test Systems Section of the Nuclear Test Engineering Division has been developing standard components for its family of canisters. One area of concern in the design has been the weld joints between the main canister channels and the canister endplates. The Solid Mechanics Group of Engineering Mechanics performed numerical calculations on this joint with the SAP4 finite element code

1981-01-01

160

Intelligent forms processing system  

Microsoft Academic Search

This paper describes an intelligent forms processing system (IFPS) which provides capabilities for automatically indexing\\u000a form documents for storage\\/retrieval to\\/from a document library and for capturing information from scanned form images using\\u000a intelligent character recognition (ICR). The system also provides capabilities for efficiently storing form images. IFPS consists\\u000a of five major processing components: (1) An interactive document analysis stage that

Richard G. Casey; David R. Ferguson; K. Mohiuddin; Eugene Walach

1992-01-01

161

BEAM DIAGNOSTIC SYSTEM OF XFEL\\/SPring8  

Microsoft Academic Search

We present the design and the performance of the beam diagnostic system of XFEL\\/SPring-8. The XFEL facility requires sub-Pm resolution beam position monitors (BPM), screen monitors with less than 10 Pm resolution, high-speed beam-charge monitors and a temporal structure measurement system with less than 10 fs resolution. We developed an rf cavity BPM system that uses the TM110 mode at

H. Maesaka; S. Inoue; T. Ohshima; S. Matsubara; A. Higashiya; M. Yabashi; T. Shintake; Y. Otake

162

Data mining based full ceramic bearing fault diagnostic system using AE sensors.  

PubMed

Full ceramic bearings are considered the first step toward full ceramic, oil-free engines in the future. No research on full ceramic bearing fault diagnostics using acoustic emission (AE) sensors has been reported. Unlike their steel counterparts, signal processing methods to extract effective AE fault characteristic features and fault diagnostic systems for full ceramic bearings have not been developed. In this paper, a data mining based full ceramic bearing diagnostic system using AE based condition indicators (CIs) is presented. The system utilizes a new signal processing method based on Hilbert Huang transform to extract AE fault features for the computation of CIs. These CIs are used to build a data mining based fault classifier using a k-nearest neighbor algorithm. Seeded fault tests on full ceramic bearing outer race, inner race, balls, and cage are conducted on a bearing diagnostic test rig and AE burst data are collected. The effectiveness of the developed fault diagnostic system is validated using real full ceramic bearing seeded fault test data. PMID:21990335

He, David; Li, Ruoyu; Zhu, Junda; Zade, Mikhail

2011-10-10

163

Transportation Systems Planning Process  

Microsoft Academic Search

PLANiTS (Planning and Analysis Integration for Intelligent Trans- portation Systems) is a process-based computer system that supports a series of mutually interdependent steps progressing toward developing and programming transportation improvement projects. It is a tool that translates problems and goals to performance measures, examines possible competing and complementary transportation improvement actions, systematically evaluates the impacts of actions using models and

ASAD J. KHATTAK; ADIB KANAFANI

164

WWMCCS System 700 Remote Terminal, Test and Diagnostic Software Utilization.  

National Technical Information Service (NTIS)

Test and Diagnostic software is supplied under the WWMCCS ADP contract to all System 700 remote terminal installations. This paper describes the content of the off-line programs and provides detailed step-by-step procedures for their utilization in a typi...

K. W. Wadman

1976-01-01

165

Electrooptically switched multipass system for laser scattering diagnostics.  

PubMed

A multiple pass technique for use in laser scattering experiments is accomplished by trapping a pulse in a resonatorlike geometry. The construction, test, and operation of the multipass system are described. The gain is measured by Rayleigh-scattering from a gas filled experimental chamber. Consequences for plasma diagnostics are discussed. PMID:20168939

Döbele, H F; Gindele, K

1977-09-01

166

A modern diagnostic approach for automobile systems condition monitoring  

NASA Astrophysics Data System (ADS)

An important topic in automotive research and development is the area of active and passive safety systems. In general, it is grouped in active safety systems to prevent accidents and passive systems to reduce the impact of a crash. An example for an active system is ABS while a seat belt tensioner represents the group of passive systems. Current developments in the automotive industry try to link active with passive system components to enable a complete event sequence, beginning with the warning of the driver about a critical situation till the automatic emergency call after an accident. The cross-linking has an impact on the current diagnostic approach, which is described in this paper. Therefore, this contribution introduces a new diagnostic approach for automotive mechatronic systems. The concept is based on monitoring the messages which are exchanged via the automotive communication systems, e.g. the CAN bus. According to the authors' assumption, the messages on the bus are changing between faultless and faulty vehicle condition. The transmitted messages of the sensors and control units are different depending on the condition of the car. First experiments are carried and in addition, the hardware design of a suitable diagnostic interface is presented. Finally, first results will be presented and discussed.

Selig, M.; Shi, Z.; Ball, A.; Schmidt, K.

2012-05-01

167

Diagnostic imaging of the respiratory system in exotic companion mammals.  

PubMed

The level of care for smaller companion mammals has increased significantly during the past few years. Today, exotic companion mammals are acknowledged as a specific area of zoologic medicine. Owner demands for a higher level of care is increasing dramatically. Because most of these patients are small (less than 2 kg), this represents a great challenge, in particular for the field of diagnostic imaging. This article reviews the 5 main diagnostic imaging modalities currently available for investigation of the respiratory system of exotic companion mammals: radiography, ultrasonography, endoscopy, computed tomography, and magnetic resonance. PMID:21601819

Capello, Vittorio; Lennox, Angela M

2011-05-01

168

Comparison of two diagnostic systems for Complicated Grief  

Microsoft Academic Search

BackgroundTo date, there are mainly two diagnostic systems that have been proposed for the diagnosis of Complicated Grief [Horowitz, M.J., Siegel, B., Holen, A., Bonanno, G.A., Milbrath, C., Stinson, C.H., 1997. Diagnostic criteria for complicated grief disorder. American Journal of Psychiatry 154, 904–910; Prigerson, H.G., Shear, M.K., Jacobs, S.C., Reynolds, C.F., Maciejewski, P.K., Davidson, J.R., Rosenheck, R., Pilkonis, P.A., Wortman,

Simon Forstmeier; Andreas Maercker

2007-01-01

169

Process design for gold ores: A diagnostic approach  

Microsoft Academic Search

Much careful work and thought are needed from the time an ore is discovered until a marketable product is produced. Most often, incomplete or imprecise information on the deposit must be used to decide to continue or not with the development and implementation of a project. This paper presents a diagnostic methodology to deal with gold projects at the preliminary

V. M. Torres; A. P. Chaves; J. A. Meech

1999-01-01

170

Investigation of PACVD protective coating processes using advanced diagnostics techniques  

SciTech Connect

Objective is to understand the mechanisms governing nonequilibrium plasma atomistic or molecular deposition of hard face coatings. Laser diagnostic methods include coherent anti-Stokes Raman spectroscopy (CARS) and laser-induced fluorescence. TiB[sub 2] and diamonds were used as the hard face coating materials. Diborane was used as precursor to TiB[sub 2].

Roman, W.C.

1993-05-07

171

On-board fault diagnostics for fly-by-light flight control systems using neural network flight processors  

Microsoft Academic Search

Fly-by-Light control systems offer higher performance for fighter and transport aircraft, with efficient fiber optic data transmission, electric control surface actuation, and multi-channel high capacity centralized processing combining to provide maximum aircraft flight control system handling qualities and safety. The key to efficient support for these vehicles is timely and accurate fault diagnostics of all control system components. These diagnostic

James M. Urnes; John Cushing; William E. Bond; Steve Nunes

1996-01-01

172

Process Diagnostics of a Pulsed SLAN Microwave Plasma for Polymerizationin of Hexamethyldisiloxane  

NASA Astrophysics Data System (ADS)

A remote microwave-excited plasma has been utilized for the deposition of scratch resistant silicon oxide films from polymerization of hexamethyldisiloxane (HMDSO). The primary plasma is excited in a slot antenna (SLAN) geometry. Process gases are mainly oxygen and argon, whereas HMDSO is added downstream. Varying the pulse frequency considerably influences the deposition results, e.g. growth rate and film microstructure. This has been investigated experimentally by ex-situ methods (REM, FTIR) as well as by in-situ plasma diagnostics. For the latter we used imaging spectroscopy with a fast CCD camera system and mass spectroscopy with a plasma process monitor. A specific molecular fragment was found as a precursor. Process dependencies and relations to the atomic oxygen density are discussed. Conclusions for improving film quality are drawn.

Brockhaus, A.; Soll, Ch.; Georg, A.; Behle, St.; Theirich, D.; Engemann, J.

1998-10-01

173

Design process for NIF laser alignment and beam diagnostics  

SciTech Connect

In a controller for an adaptive optic system designed to correct phase aberrations in a high power laser, the wavefront sensor is a discrete Hartmann-Shack design. It uses an army of lenslets (like a fly` s eye) to focus the laser into 77 spots on a CCD camera. Average local tilt of the wavefront across each lenslet changes the position of its focal spot. The system requires 0.1 pixel accuracy in determining the focal spot location. We determine a small area around each spot` s previous location. Within this area, we calculate the centroid of the light intensity in x and y. This calculation fails if the spot regions overlap. Especially during initial acquisition of a highly distorted beam, distinguishing overlapping spots is difficult. However, low resolution analysis of the overlapping spots allows the system to estimate their positions. With this estimate, it can use the deformable mirror to correct the beam enough so we can detect the spots using conventional image processing.

Grey, A., LLNL

1998-06-09

174

Medical diagnostic imaging support systems for military medicine  

NASA Astrophysics Data System (ADS)

The Surgeon's General of the military services created the Medical Diagnostic Imaging Support (MDIS) project to exploit the results of extensive imaging research efforts over the past ten years. The MDIS project will achieve the objective of implementing filmless medical imaging systems at several military medical treatment facilities over the next 4 years. Filmless medical imaging systems must be presented to decision makers via strategic principles to foster support. MDIS is a superior alternative for health care delivery when compared to film- based image management systems which are inherently limited by film as a hard copy media. Four enabling core technologies make it possible to system integrate an effective filmless system for military medicine. These filmless MDIS systems will be acquired from industry through a contracting approach that (1) functionally describes subsystem and system performance for acceptable clinical operations, (2) validates proposed systems through performance evaluation, and (3) makes a system selection and contract award that based on best value for the government.

Goeringer, Fred

1991-05-01

175

Electrostatic containerless processing system  

Microsoft Academic Search

We introduce a materials science tool for investigating refractory solids and melts: the electrostatic containerless processing system (ESCAPES). ESCAPES maintains refractory specimens of materials in a pristine state by levitating and heating them in a vacuum chamber, thereby avoiding the contaminating influences of container walls and ambient gases. ESCAPES is designed for the investigation of thermophysical properties, phase equilibria, metastable

Aaron J. Rulison; John L. Watkins; Brian Zambrano

1997-01-01

176

Compact 32-bit system processing units  

SciTech Connect

The HP model 530 and model 540 system processing units are based on HP's propriety 32-bit VLSI NMOS-111 circuits. The model 530 is designed for rack-mount configurations and the model 540 is designed for use in office system environments. These two processing units, like other members of the HP 9000 series 500 family, can have more than one CPU and one I/O processor for applications requiring the added performance. Both units can be programmed and networked using HP's HP-UX and LAN 9000 systems. Their architecture, diagnostics, cooling, environmental testing and EMI testing are discussed. 5 references.

Allen, K.W.; Christofanelli, P.C.; Kuseski, R.E.; Larson, R.D.; Maitland, D.; Thayer, L.J.

1984-05-01

177

Using a failure modes, effects and diagnostic analysis (FMEDA) to measure diagnostic coverage in programmable electronic systems  

Microsoft Academic Search

One of the key issues in the quantitative evaluation of programmable electronic systems is the diagnostic capability of the equipment. This is measured by a parameter called the Coverage Factor, C. This factor can vary widely. The range of possible values is often the subject of great debate. Within limits, the diagnostic coverage factor can be calculated by knowing which

William M. Goble; A. C. Brombacher

1999-01-01

178

Supervisory control and diagnostics system for the mirror fusion test facility: overview and status 1980  

SciTech Connect

The Mirror Fusion Test Facility (MFTF) is a complex facility requiring a highly-computerized Supervisory Control and Diagnostics System (SCDS) to monitor and provide control over ten subsystems; three of which require true process control. SCDS will provide physicists with a method of studying machine and plasma behavior by acquiring and processing up to four megabytes of plasma diagnostic information every five minutes. A high degree of availability and throughput is provided by a distributed computer system (nine 32-bit minicomputers on shared memory). Data, distributed across SCDS, is managed by a high-bandwidth Distributed Database Management System. The MFTF operators' control room consoles use color television monitors with touch sensitive screens; this is a totally new approach. The method of handling deviations to normal machine operation and how the operator should be notified and assisted in the resolution of problems has been studied and a system designed.

McGoldrick, P.R.

1981-01-01

179

Development of Visual Diagnostic Expertise in Pathology - An Information-processing Study  

PubMed Central

Objective: To identify key features contributing to trainees’ development of expertise in microscopic pathology diagnosis, a complex visual task, and to provide new insights to help create computer-based training systems in pathology. Design: Standard methods of information-processing and cognitive science were used to study diagnostic processes (search, perception, reasoning) of 28 novices, intermediates, and experts. Participants examined cases in breast pathology; each case had a previously established gold standard diagnosis. Videotapes correlated the actual visual data examined by participants with their verbal “think-aloud” protocols. Measurements: Investigators measured accuracy, difficulty, certainty, protocol process frequencies, error frequencies, and times to key diagnostic events for each case and subject. Analyses of variance, chi-square tests and post-hoc comparisons were performed with subject as the unit of analysis. Results: Level of expertise corresponded with differences in search, perception, and reasoning components of the tasks. Several discrete steps occur on the path to competence, including development of adequate search strategies, rapid and accurate recognition of anatomic location, acquisition of visual data interpretation skills, and transitory reliance on explicit feature identification. Conclusion: Results provide the basis for an empirical cognitive model of competence for the complex tasks of microscopic pathology diagnosis. Results will inform the development of computer-based pedagogy tools in this domain

Crowley, Rebecca S.; Naus, Gregory J.; Stewart, Jimmie; Friedman, Charles P.

2003-01-01

180

Medical diagnostic system and method for capturing medical image information  

US Patent & Trademark Office Database

The invention relates to a medical diagnostic system having two C-arms which are adjustable with the aid of two drive means and serve as retaining devices for one medical measuring system in each case. At least one evaluation unit and at least one display element are provided for each medical measuring system. The first measuring system is an X-ray measuring system comprising an X-ray emitter and an X-ray detector and has a high spatial resolution. The second measuring system is a nuclear medicine measuring system for visualizing tissue functions. Accurate and rapid medical diagnoses and interventions are possible based on image information generated by both measuring systems.

Klingenbeck-Regn; Klaus (Nuremberg, DE)

2010-10-05

181

System for simulating fluctuation diagnostics for application to turbulence computations  

SciTech Connect

Present-day nonlinear microstability codes are able to compute the saturated fluctuations of a turbulent fluid versus space and time, whether the fluid be liquid, gas, or plasma. They are therefore able to determine turbulence-induced fluid (or particle) and energy fluxes. These codes, however, must be tested against experimental data not only with respect to transport but also characteristics of the fluctuations. The latter is challenging because of limitations in the diagnostics (e.g., finite spatial resolution) and the fact that the diagnostics typically do not measure exactly the quantities that the codes compute. In this work, we present a system based on IDL registered analysis and visualization software in which user-supplied 'diagnostic filters' are applied to the code outputs to generate simulated diagnostic signals. The same analysis techniques as applied to the measurements, e.g., digital time-series analysis, may then be applied to the synthesized signals. Their statistical properties, such as rms fluctuation level, mean wave numbers, phase and group velocities, correlation lengths and times, and in some cases full S(k,{omega}) spectra, can then be compared directly to those of the measurements.

Bravenec, R.V.; Nevins, W.M. [University of Texas, Fusion Research Center, 1 University Station, C1510 Austin, Texas 78712-0263 (United States); Lawrence Livermore National Laboratory, P.O. Box 808 (L-637), Livermore, California 94551-0808 (United States)

2006-01-15

182

Cancer diagnostics using neural network sorting of processed images  

NASA Astrophysics Data System (ADS)

A combination of image processing with neural network sorting was conducted to demonstrate feasibility of automated cervical smear screening. Nuclei were isolated to generate a series of data points relating to the density and size of individual nuclei. This was followed by segmentation to isolate entire cells for subsequent generation of data points to bound the size of the cytoplasm. Data points were taken on as many as ten cells per image frame and included correlation against a series of filters providing size and density readings on nuclei. Additional point data was taken on nuclei images to refine size information and on whole cells to bound the size of the cytoplasm, twenty data points per assessed cell were generated. These data point sets, designated as neural tensors, comprise the inputs for training and use of a unique neural network to sort the images and identify those indicating evidence of disease. The neural network, named the Fast Analog Associative Memory, accumulates data and establishes lookup tables for comparison against images to be assessed. Six networks were trained to differentiate normal cells from those evidencing various levels abnormality that may lead to cancer. A blind test was conducted on 77 images to evaluate system performance. The image set included 31 positives (diseased) and 46 negatives (normal). Our system correctly identified all 31 positives and 41 of the negatives with 5 false positives. We believe this technology can lead to more efficient automated screening of cervical smears.

Wyman, Charles L.; Schreeder, Marshall; Grundy, Walt; Kinser, Jason M.

1996-03-01

183

Realizing Net-Centric Diagnostics Within the Naval Maintenance System  

Microsoft Academic Search

The U.S. Navy's current implementation of the three-level maintenance philosophy achieves mission readiness. However, there are inefficiencies in the maintenance system which waste resources and manpower. These inefficiencies may be overcome by facilitating improved testing capabilities and data sharing between the Organizational level of maintenance (O-level) and the Intermediate level (l-level) and\\/or Depot (D-level). The Integrated Diagnostics and Automated Test

Russell Shannon; J. Quiter; A. D'Annunzio; R. Meseroll; G. Edwards; C. Koepping

2006-01-01

184

DIAGNOSTIC SYSTEM OF THE EINDHOVEN LINAC-RACETRACK MICROTRON COMBINATION  

Microsoft Academic Search

An elaborate diagnostic system is presented for efficient commissioning of a 10 MeV linac and a 10-75 MeV racetrack microtron, which will serve as injectors for the electron storage ring EUTERPE. These injectors will be commissioned in two stages. First, proper injection of a 10 MeV electron beam into the microtron will be en- sured. OTR, beam position and current

W. H. C. Theuws; R. W. de Leeuw; L. W. A. M. Gossens; P. M. Spoek; J. I. M. Botman

185

Radial diagnostics in the ecological trauma monitoring system  

NASA Astrophysics Data System (ADS)

Both creating of effective identification and evaluation mechanisms of environmental factors hazardous for health, and revealing their influence degree on the human health play an important role in ecological monitoring. The grate importance in a solution of many ecological problems belongs to medicine, first of all, to its social-preventive brunch. In this reference trauma remains the extremely important problem. Annually more than 10 million persons sustain traumas. Alongside with occupational, transport trauma, a significant number of trauma cases occur due to the impact of various ecological factors, including natural disasters, mass poisonings and other reasons. Trauma results in severe changes in human body organs and systems; the timely detection and correct evaluation of these changes are the key points for the choice of treatment. Among diagnostic methods used for this purpose, the methods of radial diagnostics play an important role. Various radial methods-- x-ray, radionuclide, ultrasonic, magnetic resonance imaging, computer tomography (CT)--are used to detect the functional and structural changes of vital organs and systems in trauma. Each of these methods has its advantages and shortages. The reported study was devoted to the analysis of using the photon systems (gamma-camera and computer tomography) in application of radionuclide and CT methods of radial diagnostics in trauma.

Siniakova, Olga G.; Ishmukhametov, Airat I.; Proscurina, Gulnar B.; Sharifullin, Faad A.

1997-06-01

186

Clinical cognition and diagnostic error: applications of a dual process model of reasoning.  

PubMed

Both systemic and individual factors contribute to missed or delayed diagnoses. Among the multiple factors that impact clinical performance of the individual, the caliber of cognition is perhaps the most relevant and deserves our attention and understanding. In the last few decades, cognitive psychologists have gained substantial insights into the processes that underlie cognition, and a new, universal model of reasoning and decision making has emerged, Dual Process Theory. The theory has immediate application to medical decision making and provides an overall schema for understanding the variety of theoretical approaches that have been taken in the past. The model has important practical applications for decision making across the multiple domains of healthcare, and may be used as a template for teaching decision theory, as well as a platform for future research. Importantly, specific operating characteristics of the model explain how diagnostic failure occurs. PMID:19669918

Croskerry, Pat

2009-08-11

187

A local area network diagnostic assistant expert system  

SciTech Connect

We are currently developing a stand-alone Local Area Network (LAN) Diagnostic Assistant expert system to assist system managers in diagnosing network-related hardware and software malfunctions. The goal of this system is to aid in identifying malfunctions associated with a single workstation, a group of workstations, communications between workstations, and general statements of the ''Ethernet not working'' type of problems. The system consists of a geographical editor for data entry and modification of LAN information and a diagnostic environment for solving problems. Much work has been done in laying the initial framework for the system in the areas of LAN representation, the problem-solving strategy, and the user interface. We used a hierarchical frame-based representation for the LAN. Information for the strategy mechanism was gathered through case studies and background information. Ideas from heuristic classification were incorporated into the strategy mechanism. As in any system development, a majority of the time was spent developing a good user interface. We used graphics renditions wherever natural and minimized keyboard input by using mouse-selectable buttons and menus. Currently, a prototype version of the system is available that assists with some single-workstation problems. 7 refs., 10 figs.

Mniszewski, S.M.; Peter, E.A.; Lloyd, S.C.

1988-01-01

188

Commissioning results of the APS storage ring diagnostics systems  

SciTech Connect

Initial commissionings of the Advanced Photon Source (APS) 7-GeV storage ring and its diagnostics systems have been done. Early studies involved single-bunch measurements for beam transverse size ({sigma}{sub x} {approx} 150 {mu}m, {sigma}{sub y} {approx} 50 {mu}m), current, injection losses, and bunch length. The diagnostics have been used in studies related to the detection of an extra contribution to beam jitter at {approximately} 6.5 Hz frequency; observation of bunch lengthening ({sigma} {approx} 30 to 60 ps) with single-bunch current; observation of an induced vertical, head-tail instability; and detection of a small orbit change with insertion device gap position. More recently, operations at 100-mA stored-beam current, the baseline design goal, have been achieved with the support of beam characterizations.

Lumpkin, A.H.

1996-12-31

189

Diagnostic criteria for systemic lupus erythematosus: has the time come?  

PubMed

Systemic lupus erythematosus (SLE) is a multiorgan disease with protean manifestations. Because SLE is uncommon and heterogeneous, its diagnosis can pose a considerable challenge, especially for clinicians with limited expertise of the disease. This is particularly true at the early stages of SLE, when an inadequate number of features to secure the diagnosis might be present, and for patients presenting with uncommon features, which can nonetheless be severe and require prompt treatment. Furthermore, the suboptimal performance of immunological testing in patients referred for possible SLE has been highlighted. As a result, SLE remains largely a clinical diagnosis that is made after excluding alternative diagnoses. Diagnostic criteria can expedite diagnosis and treatment, but are not available for SLE. Thus, SLE classification criteria are often used, but strict adherence to these criteria could delay diagnosis. Therefore, while eagerly awaiting diagnostic criteria for this disease, we propose interim potential solutions to facilitate its diagnosis. PMID:23838616

Bertsias, George K; Pamfil, Cristina; Fanouriakis, Antonios; Boumpas, Dimitrios T

2013-07-09

190

Light emission computed tomography system for plasma diagnostics.  

PubMed

The 3-D measurement of plasma is a significant subject for analysis; development of practical methods, particularly noninvasive methods, are needed. This paper reports a new method for plasma diagnostics called light emission computed tomography, which is capable of noninvasive imaging the internal emission intensity of a 3-D source over any spectral range by sensing the visible radiation emitted by the plasma. To ensure the effectiveness of this technique, we developed a light emission computed tomography system with automatic data collection; and we performed some experiments on discharge plasmas to estimate the performance of the system. We obtained good images of radiation intensity distributions. PMID:20523438

Hino, M; Aono, T; Nakajima, M; Yuta, S

1987-11-15

191

Diagnostic system configuration optimization and its application to aircraft engine fault diagnosis  

Microsoft Academic Search

Conventional fault diagnostic system design is typically performance-driven, which has several drawbacks. The most significant one is that the performance-driven design may result in an increase on overall maintenance costs. To address these problems, this thesis introduces a novel design philosophy for fault diagnostic systems. Under this new design philosophy, a fault diagnostic system design is casting as an optimization

Weizhong Yan

2003-01-01

192

Findings from evaluations of the benefits of diagnostic imaging systems.  

PubMed

Canada Health Infoway and its partners in the provinces and territories have made significant investments in diagnostic imaging (DI) systems across Canada. Infoway's DI Investment Program is to implement storage for diagnostic digital images so that clinicians can view images regardless of where they are stored. Specifically, Infoway is investing in Picture Archiving and Communications Systems (PACS), which are those systems with the modern digital archiving capabilities used by DI systems.eHealth implementations in Canada are responsible for demonstrating the value of eHealth investments to users and stakeholders and driving benefit optimization. Canada has a rich set of results from British Columbia, Ontario, Nova Scotia, and Newfoundland and Labrador due to early Infoway investments in DI systems. The positive evaluation results are encouraging but they indicate that continued effort and investment are required to fully realize the benefits. This paper discusses findings from evaluation studies, the pan-Canadian aggregation study, and possibilities for benefit optimization from investments made in the Electronic Health Record (EHR). PMID:19380927

Hagens, Simon; Kraetschmer, Nancy; Savege, Craig

2009-01-01

193

THE RARE EARTH PEAK: AN OVERLOOKED r-PROCESS DIAGNOSTIC  

SciTech Connect

The astrophysical site or sites responsible for the r-process of nucleosynthesis still remains an enigma. Since the rare earth region is formed in the latter stages of the r-process, it provides a unique probe of the astrophysical conditions during which the r-process takes place. We use features of a successful rare earth region in the context of a high-entropy r-process (S {approx}> 100k{sub B} ) and discuss the types of astrophysical conditions that produce abundance patterns that best match meteoritic and observational data. Despite uncertainties in nuclear physics input, this method effectively constrains astrophysical conditions.

Mumpower, Matthew R.; McLaughlin, G. C. [Department of Physics, North Carolina State University, Raleigh, NC 27695-8202 (United States); Surman, Rebecca, E-mail: mrmumpow@ncsu.edu, E-mail: gail_mclaughlin@ncsu.edu, E-mail: surmanr@union.edu [Department of Physics and Astronomy, Union College, Schenectady, NY 12308 (United States)

2012-06-20

194

Transaction Processing Operating System (TPOS).  

National Technical Information Service (NTIS)

The Transaction Processing Operating System (TPOS) is a specialized system designed to control a subset of the total computer environment, on the Honeywell H6000 architecture, of Transaction Processing Application Programs (TPAPS). The TPOS system is desi...

R. Ewing J. Bielski

1977-01-01

195

NORSAR detection processing system  

NASA Astrophysics Data System (ADS)

This Semiannual Technical Summary describes the operation, maintenance and research activities at the Norwegian Seismic Array (NORSAR). Investigations into further potential improvements in the NORSAR array processing system have continued. A new Detection Processor (DP) program has developed and tested in an off-line mode. This program is flexible enough to conduct both NORSAR and NORESS detection processing as is done today, besides incorporating improved algorithms. A wide-band slowness estimation technique has been investigated by processing data from several events from the same location. Ten quarry blasts at a dam construction site in western Russia and sixteen Semipalatinsk nuclear explosions were selected. The major conclusion from this study is that employing a wider frequency band clearly tends to increase the stability of the slowness estimates, provided the signal-to-noise ratio is adequate over the band of interest. The stability was found, particularly for Pn, to be remarkably good for the western Norway quarry blasts when using a fixed frequency band for each phase for all ten events.

Loughran, L. B.

1987-05-01

196

TV-acquired optical diagnostics systems on ATA  

SciTech Connect

The purpose of this paper is to report on optical system developments on the ATA and their applications to ATA beam characterization. Television (TV)-acquired optical diagnostics data provide spatial and temporal properties of the ATA beam that complements recorded information from other types of sensors, such as, beam-wall current monitors, x-ray probes, and rf probes. The ATA beam operates: (1) in the normal mode at 50-MeV, 10-kA at a 1-Hz rate; and (2) in the 1-KHz burst mode (for 10-pulses) at a 0.5 Hz rate. The beam has a 70-ns pulse width in vacuum propagation; however, beam-head erosion will occur in atmospheric propagation, thus limiting the pulse width to less than 50-ns. Various optical systems are used for ATA diagnostics. Optical-imaging provides a convenient measurement in a single pulse of the 2-dimensional profile of the beam intensity. It can also provide multiple 2-D framing in a single pulse. In some studies it may be desirable to study optical events with temporal resolution less than 100-ps with 1-dimensional streak cameras. Spatially integrated data from phototube cameras can also be used for background measurement applications as well as for single pixel monitoring. The optical line-of-sight (LOS) configurations have been made versatile to accommodate a large number of options for the various optical systems.

Kalibjian, R.; Chong, Y.P.; Cornish, J.P.; Jackson, C.H.; Fessenden, T.J.

1984-06-01

197

Neural network diagnostic system for dengue patients risk classification.  

PubMed

With the dramatic increase of the worldwide threat of dengue disease, it has been very crucial to correctly diagnose the dengue patients in order to decrease the disease severity. However, it has been a great challenge for the physicians to identify the level of risk in dengue patients due to overlapping of the medical classification criteria. Therefore, this study aims to construct a noninvasive diagnostic system to assist the physicians for classifying the risk in dengue patients. Systematic producers have been followed to develop the system. Firstly, the assessment of the significant predictors associated with the level of risk in dengue patients was carried out utilizing the statistical analyses technique. Secondly, Multilayer perceptron neural network models trained via Levenberg-Marquardt and Scaled Conjugate Gradient algorithms was employed for constructing the diagnostic system. Finally, precise tuning for the models' parameters was conducted in order to achieve the optimal performance. As a result, 9 noninvasive predictors were found to be significantly associated with the level of risk in dengue patients. By employing those predictors, 75% prediction accuracy has been achieved for classifying the risk in dengue patients using Scaled Conjugate Gradient algorithm while 70.7% prediction accuracy were achieved by using Levenberg-Marquardt algorithm. PMID:20703665

Faisal, Tarig; Taib, Mohd Nasir; Ibrahim, Fatimah

2010-06-25

198

Parental perspectives on the diagnostic process for Duchenne and Becker muscular dystrophy.  

PubMed

Duchenne and Becker muscular dystrophy (DBMD) are allelic, X-linked recessive, neuromuscular disorders characterized by progressive loss of muscle function. Despite technological advances in diagnostic genetic testing, the mean age at diagnosis (4.7 years) has remained unchanged for decades. The purpose of the study was to characterize parental perceptions of the diagnostic process and identify factors that influence the timeline. Data collection for this qualitative study consisted of six individual and five group interviews. Participants (N = 30) included Hispanic, non-Hispanic black, and non-Hispanic white parents whose son was diagnosed with DBMD. The "help-seeking behavior model" provided an analytical framework to analyze the data. Parents did not move through help-seeking stages unidirectionally as described in other studies. Delays existed at each stage. We identified personal, familial, social, cultural, and provider factors that impeded earlier diagnosis. These barriers prolonged movement through a stage or led families to repeat previous stages. Results should initiate debate among system administrators, patient advocates, and healthcare providers regarding which barriers may be most modifiable and which interventions may reduce the time to diagnosis and limit parental emotional distress. PMID:23494880

Daack-Hirsch, Sandra; Holtzer, Caleb; Cunniff, Christopher

2013-03-12

199

LOFT advanced control room operator diagnostic and display system (ODDS)  

SciTech Connect

The Loss-of-Fluid Test (LOFT) Reactor Facility in Idaho includes a highly instrumented nuclear reactor operated by the Department of Energy for the purpose of establishing nuclear safety requirements. The results of the development and installation into LOFT of an Operator Diagnostic and Display System (ODDS) are presented. The ODDS is a computer-based graphics display system centered around a PRIME 550 computer with several RAMTEK color graphic display units located within the control room and available to the reactor operators. Use of computer-based color graphics to aid the reactor operator is discussed. A detailed hardware description of the LOFT data system and the ODDS is presented. Methods and problems of backfitting the ODDS equipment into the LOFT plant are discussed.

Larsen, D.G.; Robb, T.C.

1980-01-01

200

Downstream electron beam exciter diagnostic with energy dependent cross section responses for process tool applications  

NASA Astrophysics Data System (ADS)

Optical emission spectroscopy (OES) still remains as the primary diagnostic in plasma process tools in micro-electronics industry. With newer plasma processes and detection demands in low open area etches, process monitoring with direct optical signals is severely limited. Here we present a diagnostic method that realizes optical signals due to an electron beam from an inductively coupled plasma. Distinct merits such as energy dependent optical emission cross section responses and stable operability in polymerizing / corrosive etch environments will be presented. Electron impact optical cross section responses of transitions in fluorocarbon, oxygen and inert gas chemistries will be shown. Such controllability, in the context of species density measurement will be discussed.

Thamban, P. L. Stephan; Padron Wells, Gabriel; Hosch, Jimmy; Goeckner, Matthew

2011-10-01

201

Development of a Compact Time-of-Flight Mass Spectrometer with a Length of 1 m for Processing Plasma Diagnostics  

NASA Astrophysics Data System (ADS)

It is desired that mass spectrometers should be compact and cost effective for use as diagnostic or monitoring tools. We examine the factors which restrict the optimum value of mass resolution attainable for time-of-flight mass spectrometers (TOF-MSs) of compact size. We have developed a 1 m long TOF-MS to diagnose plasma processes. As basic specifications, we obtained a wide mass range of over 20,000 u/e as well as a high mass resolution of up to 2,500. We succeeded in observing various kinds of positive and negative ionic polysilane molecules in addition to the neutrals in a demonstrative diagnosis of the typical silane plasmas relevant to the deposition of the hydrogenated amorphous-silicon thin-film solar cells. This diagnostic system may be a versatile and powerful tool to investigate the detailed reaction processes in various processing plasmas for thin-film deposition and surface treatment.

Saito, Naoaki; Koyama, Kazuyoshi; Tanimoto, Mitsumori

2003-08-01

202

A Diagnostic System for Improving Biomass Quality Based on a Sensor Network  

PubMed Central

Losses during storage of biomass are the main parameter that defines the profitability of using preserved biomass as feed for animal husbandry. In order to minimize storage losses, potential changes in specific physicochemical properties must be identified to subsequently act as indicators of silage decomposition and form the basis for preventive measures. This study presents a framework for a diagnostic system capable of detecting potential changes in specific physicochemical properties, i.e., temperature and the oxygen content, during the biomass storage process. The diagnostic system comprises a monitoring tool based on a wireless sensors network and a prediction tool based on a validated computation fluid dynamics model. It is shown that the system can provide the manager (end-user) with continuously updated information about specific biomass quality parameters. The system encompasses graphical visualization of the information to the end-user as a first step and, as a second step, the system identifies alerts depicting real differences between actual and predicted values of the monitored properties. The perspective is that this diagnostic system will provide managers with a solid basis for necessary preventive measures.

Bochtis, Dionysis D.; S?rensen, Claus G.; Green, Ole; Bartzanas, Thomas

2011-01-01

203

Control of Multibunch Longitudinal Instabilities and Beam Diagnostics Using a DSP-based Feedback System  

SciTech Connect

A bunch-by-bunch longitudinal feedback system has been designed and built to control coupled-bunch instabilities in the PEP-II machine. A prototype system has been installed at the Advanced Light Source at LBNL. Programmable DSPs allow longitudinal feedback processing in conjunction with data acquisition or instrumentation algorithms. Here the authors describe techniques developed for different beam and system diagnostics, such as measurements of the modal growth and damping rates and measurements of the bunch-by-bunch currents. Results from the Advanced Light Source are presented to illustrate these techniques.

Teytelman, Dmitry

2000-03-30

204

Submillimeter Spectroscopic Diagnostics in a Semiconductor Processing Plasma  

NASA Astrophysics Data System (ADS)

Millimeter and submillimeter rotational spectroscopy was used to characterize and measure the abundances of compounds in a semiconductor processing plasma. Plasmas were generated using flow mixtures of Ar, C_4F_8, and O_2 in a chamber with quartz windows for submillimeter wave transmission. Species of interest included the plasma products CF, CF_2, COF_2, and CO. Abundances as a function of flow mixtures and pressures as well as rf drive levels will be presented.

Helal, Yaser H.; Neese, Christopher F.; Holt, Jennifer A.; De Lucia, Frank C.; Ewing, Paul R.; Stout, Phillip J.; Armacost, Michael D.

2013-06-01

205

Mach-Zehnder recording systems for pulsed power diagnostics.  

PubMed

Fiber-optic transmission and recording systems, based on Mach-Zehnder modulators, have been developed and installed at the National Ignition Facility (NIF), and are being developed for other pulsed-power facilities such as the Z accelerator at Sandia, with different requirements. We present the design and performance characteristics for the mature analog links, based on the system developed for the Gamma Reaction History diagnostic at the OMEGA laser and at NIF. For a single detector channel, two Mach-Zehnders are used to provide high dynamic range at the full recording bandwidth with no gaps in the coverage. We present laboratory and shot data to estimate upper limits on the radiation effects as they impact recorded data quality. Finally, we will assess the technology readiness level for mature and developing implementations of Mach-Zehnder links for these environments. PMID:23126893

Miller, E K; Abbott, R Q; McKenna, I; Macrum, G; Baker, D; Tran, V; Rodriguez, E; Kaufman, M I; Tibbits, A; Silbernagel, C T; Waltman, T B; Herrmann, H W; Kim, Y H; Mack, J M; Young, C S; Caldwell, S E; Evans, S C; Sedillo, T J; Stoeffl, W; Grafil, E; Liebman, J; Beeman, B; Watts, P; Carpenter, A; Horsfied, C J; Rubery, M S; Chandler, G A; Torres, J A; Smelser, R M

2012-10-01

206

Materials issues in diagnostic systems for BPX and ITER  

SciTech Connect

Diagnostic systems in advanced D-T-burning fusion devices will be subjected to intense fluxes and fluences of high-energy neutrons and gamma rays. Materials used in these systems may suffer significant degradation of structural, optical, and electrical properties, either promptly upon irradiation or after accumulation of structural damage. Of particular concern are windows, optical fibers, reflectors, and insulators. Many materials currently specified for these components are known to degrade under anticipated operating conditions. However, careful materials selection and modification based on an appropriate irradiation testing program, when combined with optimization of design-sensitive factors such as location, shielding, and ease of replacement, should help to alleviate these materials problems. 30 refs., 2 figs., 1 tab.

Clinard, F.W. Jr.; Farnum, E.H. (Los Alamos National Lab., NM (United States)); Griscom, D.L. (Naval Research Lab., Washington, DC (United States)); Mattas, R.F. (Argonne National Lab., IL (United States)); Medley, S.S.; Young, K. M. (Princeton Univ., NJ (United States). Plasma Physics Lab.); Wiffen, F.W. (USDOE, Washington, DC (United States)); Wojtowicz, S.S. (General Atomics, San Diego, CA (Unit

1991-01-01

207

Diagnostic maintenance expert system for the hydraulic subsystem of a continuous miner  

Microsoft Academic Search

An expert system is being developed for diagnostic maintenance of the hydraulic system of a continuous coal mining machine. Through the use of such a system, lengthy and costly delays due to equipment failure and repair can be significantly reduced. This type of equipment diagnostic system can be applied to the electrical and mechanical systems as well as other mining

J. Mitchell

1989-01-01

208

Multispectral Data Processing System (MDPS).  

National Technical Information Service (NTIS)

This report summarizes the research performed in the design and specification of the computer system architecture and software required for the Multispectral Data Processing System (MDPS). The objective of the MDPS is the efficient processing of large vol...

1983-01-01

209

Diagnostic Approach to Weapon System Lifecycle Support: The Phalanx Close-in Weapon System.  

National Technical Information Service (NTIS)

This study discusses a diagnostic approach to examining the lifecycle support system of a weapon system specifically illustrating the approaches for the US Navy Phalanx Close-in Weapon System (CIWS). The study gauges the status of current readiness and an...

A. Apte R. Rendon

2009-01-01

210

Diagnostics of vibrations in induction motor-pump system used for reactor core cooling system  

Microsoft Academic Search

Analysis and diagnostics of vibration in industrial systems play a significant rule to prevent severe damages. This paper proposes a non-linear model to simulate the torsional vibration in the reactor core cooling system. Simulation results of an operating reactor core cooling system set with the actual parameters are presented to validate the accuracy and reliability of the proposed analytical method.

S. A. Qutb; A. M. Abdel-Hamid; A. Mansour; S. E. Soliman

2006-01-01

211

A systems approach to diagnostic ambiguity reduction in naval avionic systems  

Microsoft Academic Search

There are inefficiencies in the current United States (U.S.) Navy maintenance system. These inefficiencies waste resources and manpower. Platform-level diagnostics is relegated primarily to built-in-test (BIT). However, BIT is not entirely reliable. Enhanced Organizational level (0-level) diagnostic functionality is needed to reduce ambiguities between multiple weapons Replaceable Assemblies (wRA's) and interconnects; thus markedly reducing rates of \\

Russell Shannon; J. Quiter; A. D'Annunzio; R. Meseroll; R. Lebron; V. Sieracki

2005-01-01

212

Diagnostic omission errors in acute paediatric practice: impact of a reminder system on decision-making  

Microsoft Academic Search

BACKGROUND: Diagnostic error is a significant problem in specialities characterised by diagnostic uncertainty such as primary care, emergency medicine and paediatrics. Despite wide-spread availability, computerised aids have not been shown to significantly improve diagnostic decision-making in a real world environment, mainly due to the need for prolonged system consultation. In this study performed in the clinical environment, we used a

Padmanabhan Ramnarayan; Andrew Winrow; Michael Coren; Vasanta Nanduri; Roger Buchdahl; Benjamin Jacobs; Helen Fisher; Paul M Taylor; Jeremy C Wyatt; Joseph Britto

2006-01-01

213

Altronic`s latest ignition system features secondary diagnostics  

SciTech Connect

Few issues continue to cause more distress for operators of gas engines and integral compressors than spark plug life. Altronic`s new CPU-95 ignition system was developed for use on medium and high-speed gas-fueled engines driving compressors, generators and pumps. In addition to the new secondary prognostic capability, the 24 V dc-powered CPU-95 system is designed to handle all the functions of a modern digital ignition. This includes spark characteristic control, global and individual cylinder timing adjustments, and extensive user display and serial communications capabilities. But the most revolutionary feature of the CPU-95 system is its built-in secondary ignition diagnosis capabilities, which provide a prognosis of spark plug life. The system displays a number that is an indicator of how much voltage is required at each cylinder. As the spark plug gap erodes the number increases. In addition to displaying and alarming relative voltage demand, the secondary-side diagnosis can also alarm for high or low spark voltage (by cylinder), or no secondary spark. Primary-side diagnostic capabilities (also annunciated by cylinder) include open or shorted circuits. The system can also diagnose for faults in the gear tooth pickup, reset pickup, four-cycle pickup, ring gear, microprocessor, current loop, EEPROM checksum, analog timing input (4-20 mA) being out of range, and a failure to charge the capacitor.

NONE

1996-07-01

214

Filter-fluorescer diagnostic system for the National Ignition Facility  

SciTech Connect

An early filter-fluorescer diagnostic system is being fielded at the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) to measure the amount of hard x rays (20

McDonald, J.W.; Kauffman, R.L.; Celeste, J.R.; Rhodes, M.A.; Lee, F.D.; Suter, L.J.; Lee, A.P.; Foster, J.M.; Slark, G. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States); Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR (United Kingdom)

2004-10-01

215

X-Ray Plasma Diagnostics for Accreting Black Hole Systems  

NASA Astrophysics Data System (ADS)

The last ten years have seen significant progress have seen major improvements in our ability to observe and characterize the X-ray emission from black hole systems. In particular, the arrival of a new generation of X-ray satellites that combine large collection area, broad energy response, and flexible monitoring ability (starting with RXTE, BeppoSax, INTEGRAL, and culminating with Suzaku and Swift) finally enables us to begin to uniquely probe the rapidly changing physical conditionsin the plasma near a black hole, on timescales from milliseconds to years. I review our current understanding of these conditions, with an eye towards stimulating discussions with laboratory colleagues who have access to (still) much better diagnostics.

Coppi, P. S.

2010-06-01

216

The SSCL process control system  

NASA Astrophysics Data System (ADS)

The Superconducting Super Collider's (SSC) Process Control System was designed to account for 40% of the total I/O control points of the accelerator. It would have controlled the processes associated with the cryogenic refrigerators, vacuum systems, low conductivity water systems and instrument air system of the SSC. Although large scale, the technologies required to control and program such systems in an integrated manner is becoming available through industrial distributed systems controls vendors. This paper describes the proposed architecture of the SSCL Process Control System, how it is differentiated from the SSC Beam Controls and the techniques that would have been employed to integrate it into the SSCL Global Accelerator Control System.

Moore, T.; Bork, R.; Heefner, J.; Basiti, S.

1994-12-01

217

An Intelligent Diagnostic\\/Prognostic Framework for Automotive Electrical Systems  

Microsoft Academic Search

Automotive systems are becoming increasingly dependent on electrical components, computer control, and sensors. It has become extremely critical to detect faults in the electrical system and predict the remaining useful life of failing components. This paper introduces an integrated methodology for monitoring, modeling, data processing, fault diagnosis, and failure prognosis of critical electrical components such as the battery. The enabling

Manzar Abbas; Aldo A. Ferri; Marcos E. Orchard; George J. Vachtsevanos

2007-01-01

218

UNDULATOR SYSTEMS AND PHOTON DIAGNOSTICS FOR THE EUROPEAN XFEL PROJECT  

Microsoft Academic Search

For the European XFEL project very long undulator systems are required. Due to the nature of the SASE process there are stringent requirements and tolerances on these systems. An extensive R&D phase toward solutions has been started. In this contribution an overview over this R&D work is given.

Joachim Pflüger

2005-01-01

219

Undulator systems and photon diagnostics for the European XFEL project  

SciTech Connect

For the European XFEL project very long undulator systems are required. Due to the nature of the SASE process there are stringent requirements and tolerances on these systems. An extensive R and D phase to solutions has been started. In this contribution an overview over this R and D work is given.

Pflueger, J., E-mail: joachim.pflueger@xfel.eu [European XFEL (Germany)

2010-12-15

220

An Active Diagnostic System for Structural Health Monitoring of Rocket Engines  

Microsoft Academic Search

An active diagnostic system using built-in piezoelectric actuator\\/sensor networks was developed for monitoring crack growth in a rocket engine pipe. The diagnostic system combines a sensor network, portable diagnostic hardware and data analysis software which allows for real-time in situ monitoring and long term tracking of the structural integrity of pressure vessels. Experimental data shows that the system can detect

Xinlin P. Qing; Hian-Leng Chan; Shawn J. Beard; Amrita Kumar

2006-01-01

221

Diagnostic Setup for Characterization of Near-Anode Processes in Hall Thrusters  

SciTech Connect

A diagnostic setup for characterization of the near-anode processes in Hall thrusters was designed and assembled. Experimental results with a single floating probe show that radial probe insertion does not cause perturbations to the discharge and therefore can be used for near-anode measurements.

L. Dorf; Y. Raitses; N. J. Fisch

2003-05-29

222

A process model in continuing professional development: Exploring diagnostic radiographers’ views  

Microsoft Academic Search

This article is based on an exploratory, interpretative grounded theory study that looked at practitioners’ perceptions of continuing professional development (CPD) in diagnostic radiography in the UK. Using a combination of in-depth interviews and secondary analysis of published material, a dynamic CPD process model was generated. The study aimed to explore what radiographers understood by the term CPD and whether

Suzanne M. Henwood; Ann Taket

2008-01-01

223

Numerical magnetic field analysis and signal processing for fault diagnostics of electrical machines  

Microsoft Academic Search

Numerical magnetic field analysis is used for predicting the performance of an induction motor and a slip-ring generator having different faults implemented in their structure. Virtual measurement data provided by the numerical magnetic field analysis are analysed using modern signal processing techniques to get a reliable indication of the fault. Support vector machine based classification is applied to fault diagnostics.

S. Pöyhönen; M. Negrea; P. Jover; A. Arkkio; H. Hyötyniemi

2003-01-01

224

Generation of diagnostic trees by means of simplified process models and machine learning  

Microsoft Academic Search

Fault diagnosis by means of diagnostic trees is of considerable interest for industrial applications. The drawbacks of this approach are mostly related to the knowledge elicitation through laborious enumeration of the tree structure and ad hoc threshold selection for symptoms definition. These problems can be alleviated if a more profound knowledge of the process is brought into play. The main

Dominik Füssel

1997-01-01

225

DYNAMIC EMPIRICAL MODELLING TECHNIQUES FOR EQUIPMENT AND PROCESS DIAGNOSTICS IN NUCLEAR POWER PLANTS  

Microsoft Academic Search

The development of on-line monitoring techniques for equipment and process diagnostics in nuclear power plants is the subject of increasing attention in the industry and a potentially important contributor to improved performance and economics. This paper presents techniques derived from empirical modelling methods and especially designed to tackle the recognition of dynamic transients with the aim of detecting and diagnosing

Davide Roverso

226

Analysis on Common Rail diesel engine combustion process by optical diagnostics  

Microsoft Academic Search

This paper reviews a number of recent investigations in Common Rail diesel passenger car engines using examples from relevant research investigations already performed or presently in progress at the Fluid-dynamic, Combustion and Fuel Cell for Propulsion Division of Istituto Motori using optical diagnostic techniques. The paper discusses diesel combustion fundamental processes in terms of the in-cylinder flow, sprays, combustion and

S. S. Merola; B. M. Vaglieco

227

Miniaturized nucleic acid amplification systems for rapid and point-of-care diagnostics: a review.  

PubMed

Point-of-care (POC) genetic diagnostics critically depends on miniaturization and integration of sample processing, nucleic acid amplification, and detection systems. Polymerase chain reaction (PCR) assays have extensively applied for the diagnosis of genetic markers of disease. Microfluidic chips for microPCR with different materials and designs have been reported. Temperature cycling systems with varying thermal masses and conductivities, thermal cycling times, flow-rates, and cross-sectional areas, have also been developed to reduce the nucleic acid amplification time. Similarly, isothermal amplification techniques (e.g., loop-mediated isothermal amplification or LAMP), which are still are emerging, have a better potential as an alternative to PCR for POC diagnostics. Isothermal amplification techniques have: (i) moderate incubation temperature leading to simplified heating and low power consumption, (ii) yield high amount of amplification products, which can be detected either visually or by simple detectors, (iii) allow direct genetic amplification from bacterial cells due to the superior tolerance to substances that typically inhibit PCR, (iv) have high specificity, and sensitivity, and (v) result in rapid detection often within 10-20 min. The aim of this review is to provide a better understanding of the advantages and limitations of microPCR and microLAMP systems for rapid and POC diagnostics. PMID:22704369

Ahmad, Farhan; Hashsham, Syed A

2012-05-03

228

Physics Design Considerations for Diagnostic X Electron Beam Transport System  

Microsoft Academic Search

The Diagnostic X (D-X) beamlines will transport the DARHT-II beam from the end of the accelerator to the Diagnostic X firing point providing four lines of sight for x-ray radiography. The design goal for the Diagnostic X beamline is to deliver four x-ray pulses with the DARHT-II dose format and time integrated spot size on each line of sight. The

2000-01-01

229

SEALED COMBUSTION SYSTEM WITH DIAGNOSTIC SELF-TUNING.  

SciTech Connect

This task grew out of a proposal to develop a ''concept'' oil-fired heating system that would incorporate advanced technologies available and suitable for a residential system. Discussions among the program and project personnel resulted in the identification of a sealed combustion system as of programmatic interest and the objective was to develop an approach to a sealed system with diagnostic self-tuning. The major conclusion with regard to the specific objective for this task is that a measurement of the static pressure in the input pipe can be used to provide a measure of the excess air for a limit control. Its implementation would require a suitable pressure sensor, and a circuit to combine its output signal, at the appropriate time in the operating cycle, to the burner control. The sensor and control combination will also have to be tested successfully under all conceivable contingencies that can cause the airflow to decrease. It could also be implemented, possibly even more reliably, if a mass flow sensor, such as is used in automobile engines and hence may be cheap, could be used. The pressure measurements reported here, both steady and transient, represent only the subset of a much larger set that gave a useful answer to meet the objective. These measurements suggest that they can provide useful insights into both the combustion and gas flow performance of the system. Of course, this could be extended to other types of heating systems, such as those with natural draft, those with different burners, burners with different atomization schemes (air atomization etc.), blue flame burners etc.

KRISHNA,C.R.

2004-09-30

230

Condensation Processes in Geothermal Systems  

Microsoft Academic Search

We model condensation processes in geothermal systems to understand how this process changes fluid chemistry. We assume two processes operate in geothermal systems: 1) condensation of a vapor phase derived by boiling an aqueous geothermal fluid into a cool near surface water and 2) condensation of a magmatic vapor by a deep circulating meteoric thermal fluid. It is assumed that

D. I. Norman; J. N. Moore

2005-01-01

231

Feedback control and beam diagnostic algorithms for a multiprocessor DSP system  

SciTech Connect

The multibunch longitudinal feedback system developed for use by PEP-II, ALS and DA{Phi}NE uses a parallel array of digital signal processors to calculate the feedback signals from measurements of beam motion. The system is designed with general-purpose programmable elements which allow many feedback operating modes as well as system diagnostics, calibrations and accelerator measurements. The overall signal processing architecture of the system is illustrated. The real-time DSP algorithms and off-line postprocessing tools are presented. The problems in managing 320 K samples of data collected in one beam transient measurement are discussed and the solutions are presented. Example software structures are presented showing the beam feedback process, techniques for modal analysis of beam motion(used to quantify growth and damping rates of instabilities) and diagnostic functions (such as timing adjustment of beam pick-up and kicker components). These operating techniques are illustrated with example results obtained from the system installed at the Advanced Light Source at LBL.

Teytelman, D.; Claus, R.; Fox, J.; Hindi, H.; Linscott, I.; Prabhakar, S. [Stanford Univ., CA (United States). Stanford Linear Accelerator Center; Drago, A. [INFN, Roma (Italy). Lab. Nazionali di Frascati; Stover, G. [Lawrence Berkeley Lab., CA (United States)

1996-09-01

232

Economic comparison of diagnostic antibody production in perfusion stirred tank and in hollow fiber bioreactor processes.  

PubMed

The total operating costs of small-scale monoclonal antibody production were calculated for two different upstream options and general downstream procedure based on protein A chromatography. The upstream options were a spin-filter equipped stirred-tank bioreactor (STR) and a hollow fiber bioreactor (HFB). Both the bioreactors were operated in perfusion mode. The total operating costs of the processes were 6,900 €/g for STR option and 6,400 €/g for the HFB option. In the both systems, the costs were dominated by expenses derived from the downstream section (almost 80%) that was almost identical in the both systems. In the upstream section, the investment depreciation was the largest cost item. The lower total costs of the HFB option were a result of lower investment costs and more concentrated product that led into savings also in downstream section. This study brings out the HFB as on viable alternative for stirred-tank bioreactor, especially in small-scale diagnostic monoclonal antibody production. PMID:21954092

Vermasvuori, Raisa; Hurme, Markku

2011-09-23

233

Expert System for Diagnostics and Status Monitoring of NPP Water Chemistry Condition  

SciTech Connect

Water chemistry condition (WCC) has been the subject of constant study and improvement up to the present day. It is connected with the presence of a direct relationship between the violation of water chemistry regulation on the one hand and components reliability of the circuit's equipment and cost-effectiveness of their operation on the other. It dictates the necessity to apply different optimization methods in the field of monitoring and use of information - analytical and diagnostic systems to assess WCC quality, control and support. By now NPP experts have broad experience in revealing and removing the causes of WCC disturbances. However this knowledge is often of an intuitive, non-classified nature, scattered among various working documents, which makes their transfer difficult. Based on what has been mentioned above, special attention is currently being paid to the problem of creating expert diagnostic systems for supporting the optimum WCC. The existing developments in this field (DIWA, Smart chem Works, the water quality control system at the Onagava NPP etc. [1,3,4,5] are based on wide use of experts' knowledge. Such expert diagnostic systems for supporting WCC refer to the new generation of intellectual control methods, which allow the incorporation of the latest achievements both in the field of water chemistry simulation and in the field of artificial intelligence and computer technologies. LI 'VNIPIET' employees have, for several years, been developing an expert diagnostic system for supporting WCC and status monitoring of RBMK - reactor NPPs [2]. This system has not only conveniently organized the traditional functions of information acquisition and storage, a complete presentation of information in the form of tables, graphs of a dynamical changes of parameters and formation regular reports, diagnostic functions and issuing recommendations on WCC correction, but it also allows the assessment of confidence in the diagnosis made, relying on a wide range of numerical estimates, which were calculated by the use of expert data, and to make a credible prediction of an existing situation development. The integrated use of analytical methods and artificial intelligence methods is one of the system's advantages. This combination allows the successful implementation of one of the main purposes of the system: the early detection of deviations from specified process conditions and the taking into account of even minor changes in parameters to provide an advanced WCC control and to prevent non-regular situations. (authors)

Shvedova, M.N.; Kritski, V.G.; Zakharova, S.V.; Nikolaev, F.V.; Benediktov, V.B. [All Russian Scientific Research and Design Institute of Complex Power Technology, 82 ulitsa Savushkina, St. Petersburg 197228 (Russian Federation)

2002-07-01

234

BPMS: business process management systems  

Microsoft Academic Search

In the last years a lot of research has been done in different domains concerning information system applications. Recent research is characterized by the effort of applying information systems to heterogeneous and distributed environments. Information systems dealing with the definition, administration, customization and evaluation of tasks evolving from business processes as well as from organizational structures are called Business Process

Dimitris Karagiannis

1995-01-01

235

Self-healing in large-scale systems: parallel and distributed diagnostic architectures  

Microsoft Academic Search

Automated real-time problem diagnosis is a key feature of a self-healing system. However, rapidly growing size and complexity of modern distributed systems creates a challenge for traditional centralized diagnostic approaches and calls for parallel and distributed architectures. Dividing the system into subsystems controlled by separate diagnostic engines is an obvious choice; however, on top of that, a communication architecture must

Shang Guo; Irina Rish; David Loewenstern

2005-01-01

236

Robust diagnostic approach for uncertain systems: an example for the jet engine sensor systems  

NASA Astrophysics Data System (ADS)

This paper presents a novel eigenstructure assignment approach for sythesizing robust fault detection and isolation (FDI) systems with known inputs. After formulating the FDI problem in eigenstructure assigment, we proceed to develop a parametric characterization of all allowable eigenspaces for disturbance decoupling to achieve robust fault detection. In addition to the structured uncertainties, the robustness of the diagnostic observer to unstructured modeling errors is discussed. A numerical algorithm is further proposed to suppress the effects due to the unstructured uncertainties. The overall robustness of the diagnostic strategy is verfied through simulation studies on jet engine systems.

Hsu, Pau-Lo; Shen, Li-Cheng

1995-05-01

237

Plasma diagnostic system using optical fibers with high numerical aperture  

SciTech Connect

A diagnostic system using optical fibers with high numerical apertures is constructed for investigating a structure of magnetically confined plasma. Since the fiber has no convex lens at its front facet, the radiation from all plasmas included in the viewing angle of the fiber is utilized. First, theoretical forms are derived to determine the structure of the plasma from optical signals of a few fibers arranged axisymmetrically around the plasma. Second, the numerical aperture is measured by a simple method using a circular fluorescent lamp. Third, the theoretical forms are ascertained by a mock-up experiment where a light source representing a model plasma is constructed by a matrix array of straight fluorescent lamps. In this experiment, the effect of a reflected light from a wall of a vacuum vessel is investigated. Finally, the optical system is applied to a field-reversed-configuration plasma. Obtained structures of the plasma for n=1 and 2 toroidal modes are compared with the results of the conventional method using the fibers with convex lenses. The former results agree well with the latter ones in spite of the use of one-sixth the number of fibers in the latter method.

Ohkuma, Yasunori; Kanamaru, Yuki; Hasegawa, Yoshinori; Fujino, Toshiyuki; Fujimoto, Kayoko; Gota, Hiroshi; Asai, Tomohiko; Takahashi, Tsutomu; Nogi, Yasuyuki [Institute of Science and Technology, Tokyo University of Agriculture and Technology, Koganei-shi 184-8588 (Japan); College of Science and Technology, Nihon University, Tokyo 101-8308 (Japan)

2006-06-15

238

Malfunction diagnostic analysis of nuclear power plant systems. [CAAD  

Microsoft Academic Search

A method for nuclear power plant accident diagnostics using optimum control theory is presented. A computer code, CAAD (Computer Assisted Accident Diagnostics), based on Pontryagin's Principle, was written and applied to seven types of nuclear reactor control component malfunctions. These malfunctions include the dynamics associated with a failure in reactor control rods, pressurizer relief valve, pressurizer heaters, pressurizer spray value,

Mazetis

1984-01-01

239

Adaptive Monitoring, Fault Detection and Diagnostics, and Prognostics System for the IRIS Nuclear Plant.  

National Technical Information Service (NTIS)

Ideally, health monitoring of new, complex engineering systems should occur from initial operation to decommissioning. Health monitoring typically involves a suite of modules, including system monitoring, fault detection, fault diagnostics, and system pro...

J. Coble J. W. Hines M. Humberstone

2010-01-01

240

Design of a Fault Diagnostic System for an ABS Based on Dual-CPU Structure  

Microsoft Academic Search

A fault diagnostic system with dual-CPU is designed and applied to the pneumatic anti-lock braking system (ABS) developed independently. ABS faults are classified according to the locations of possible faults through analysis of the basic configurations and operation principles of ABS. Diagnostic solutions for possible faults are raised and the corresponding diagnostic circuits and codes are designed. Fault diagnosis IS09141

Yu Guizhen; Zhang Chengyang; Ding Nenggen

2006-01-01

241

An integrated fuzzy inference based monitoring, diagnostic, and prognostic system  

NASA Astrophysics Data System (ADS)

To date the majority of the research related to the development and application of monitoring, diagnostic, and prognostic systems has been exclusive in the sense that only one of the three areas is the focus of the work. While previous research progresses each of the respective fields, the end result is a variable "grab bag" of techniques that address each problem independently. Also, the new field of prognostics is lacking in the sense that few methods have been proposed that produce estimates of the remaining useful life (RUL) of a device or can be realistically applied to real-world systems. This work addresses both problems by developing the nonparametric fuzzy inference system (NFIS) which is adapted for monitoring, diagnosis, and prognosis and then proposing the path classification and estimation (PACE) model that can be used to predict the RUL of a device that does or does not have a well defined failure threshold. To test and evaluate the proposed methods, they were applied to detect, diagnose, and prognose faults and failures in the hydraulic steering system of a deep oil exploration drill. The monitoring system implementing an NFIS predictor and sequential probability ratio test (SPRT) detector produced comparable detection rates to a monitoring system implementing an autoassociative kernel regression (AAKR) predictor and SPRT detector, specifically 80% vs. 85% for the NFIS and AAKR monitor respectively. It was also found that the NFIS monitor produced fewer false alarms. Next, the monitoring system outputs were used to generate symptom patterns for k-nearest neighbor (kNN) and NFIS classifiers that were trained to diagnose different fault classes. The NFIS diagnoser was shown to significantly outperform the kNN diagnoser, with overall accuracies of 96% vs. 89% respectively. Finally, the PACE implementing the NFIS was used to predict the RUL for different failure modes. The errors of the RUL estimates produced by the PACE-NFIS prognosers ranged from 1.2-11.4 hours with 95% confidence intervals (CI) from 0.67-32.02 hours, which are significantly better than the population based prognoser estimates with errors of ˜45 hours and 95% CIs of ˜162 hours.

Garvey, Dustin

242

SSME HPOTP post-test diagnostic system enhancement project  

NASA Astrophysics Data System (ADS)

An assessment of engine and component health is routinely made after each test or flight firing of a space shuttle main engine (SSME). Currently, this health assessment is done by teams of engineers who manually review sensor data, performance data, and engine and component operating histories. Based on review of information from these various sources, an evaluation is made as to the health of each component of the SSME and the preparedness of the engine for another test or flight. The objective of this project is to further develop a computer program which automates the analysis of test data from the SSME high-pressure oxidizer turbopump (HPOTP) in order to detect and diagnose anomalies. This program fits into a larger system, the SSME Post-Test Diagnostic System (PTDS), which will eventually be extended to assess the health and status of most SSME components on the basis of test data analysis. The HPOTP module is an expert system, which uses 'rules-of-thumb' obtained from interviews with experts from NASA Marshall Space Flight Center (MSFC) to detect and diagnose anomalies. Analyses of the raw test data are first performed using pattern recognition techniques which result in features such as spikes, shifts, peaks, and drifts being detected and written to a database. The HPOTP module then looks for combination of these features which are indicative of known anomalies, using the rules gathered from the turbomachinery experts. Results of this analysis are then displayed via a graphical user interface which provides ranked lists of anomalies and observations by engine component, along with supporting data plots for each.

Bickmore, Timothy W.

1995-01-01

243

A General Expert System Design for Diagnostic Problem Solving  

Microsoft Academic Search

Existing expert systems have a high percentage agreement with experts in a particular field in many situations. However, in many ways their overall behavior is not like that of a human expert. These areas include the inability to give flexible, functional explanations of their reasoning processes, and the failure to degrade gracefully when dealing with problems at the periphery of

Pamela K. Fink; John C. Lusth; Joe W. Duran

1985-01-01

244

A monitoring and diagnostic expert system for carbon dioxide capture  

Microsoft Academic Search

The research objective is to design and construct a knowledge-based decision support system for monitoring, control and diagnosis of the carbon dioxide capture process, which is a complicated task involving manipulation of sixteen components and their operating parameters. Since manipulation of critical parameter values directly impacts performance of the plant and carbon dioxide capture efficiency, it is important to effectively

Q. Zhou; C. W. Chan; P. Tontiwachiwuthikul

2009-01-01

245

Robust diagnostic approach for uncertain systems: an example for the jet engine sensor systems  

Microsoft Academic Search

This paper presents a novel eigenstructure assignment approach for sythesizing robust fault detection and isolation (FDI) systems with known inputs. After formulating the FDI problem in eigenstructure assigment, we proceed to develop a parametric characterization of all allowable eigenspaces for disturbance decoupling to achieve robust fault detection. In addition to the structured uncertainties, the robustness of the diagnostic observer to

Pau-Lo Hsu; Li-Cheng Shen

1995-01-01

246

Coded excitation for diagnostic ultrasound: a system developer's perspective.  

PubMed

Resolution and penetration are primary criteria for clinical image quality. Conventionally, high bandwidth for resolution was achieved with a short pulse, which results in a tradeoff between resolution and penetration. Coded excitation extends the bounds of this tradeoff by increasing signal-to-noise ratio (SNR) through appropriate coding on transmit and decoding on receive. Although used for about 50 years in radar, coded excitation was successfully introduced into commercial ultrasound scanners only within the last 5 years. This delay is at least partly due to practical implementation issues particular to diagnostic ultrasound, which are the focus of this paper. After reviewing the basics of biphase and chirp coding, we present simulation results to quantify tradeoffs between penetration and resolution under frequency-dependent attenuation, dynamic focusing, and nonlinear propagation. Next we compare chirp and Golay code performance with respect to image quality and system requirements, then we show clinical images that illustrate the current applications of coded excitation in B-mode, harmonic, and flow imaging. PMID:15801305

Chiao, Richard Y; Hao, Xiaohui

2005-02-01

247

Imaging system for hypervelocity dust injection diagnostic on NSTX  

SciTech Connect

The novel hypervelocity dust injection diagnostic will facilitate our understanding of basic aspects of dust-plasma interaction and magnetic field topology in fusion plasma devices, by observing 'comet tails' associated with the injected micron-size dust particles. A single projection of the tail onto an image plane will not provide sufficient information; therefore, we plan to use two views, with intensified DiCam-Pro cameras on two NSTX ports. Each camera can furnish up to five overlaying sequential images with gate times greater than 3 ns and 1280x1024 pixel resolution. A coherent fiber bundle with 1500x1200 fibers will relay the image from an imaging lens installed directly on the port to the camera optics. The lens receives light from the outer portion of the NSTX cross section and focuses a 1 cm tail onto at least 60 fibers for adequate resolution. The estimated number of photons received by the camera indicates signal-to-noise ratios of 10{sup 2}-10{sup 4}, with the use of a 10 nm bandwidth filter. The imaging system with one camera was successfully tested on NSTX in 2005. Photographing lithium pellets yielded bright and distinctive pictures of the tails nearly aligned with B lines. We also observed that the bright 'filaments' - plasma cords with high density and temperature - are present in both top and bottom portions of the machine.

Dorf, L. A.; Roquemore, A. L.; Wurden, G. A.; Ticos, C. M.; Wang Zhehui [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2006-10-15

248

[The optimization of techniques complex of serologic diagnostics of connective tissue systemic diseases].  

PubMed

The connective tissue systemic diseases originate from pathologic process following with antinuclear antibodies emergence. To detect these antibodies a significant number of diagnostic tests and techniques has been applied. Besides that, there is no conventional algorithm of antinuclear antibodies diagnostic. To detect antinuclear antibodies a two-fold diagnostic algorithm was applied In the capacity of screening techniques the indirect immunofluorescence technique was applied to the cells of line Hep-2 (antinuclear factor) and detection of antibodies to extractable nuclear antigen. The second stage of diagnostic included the detection of content of more specific antinuclear antibodies using the Lineblott method and the double-helical DNA antibodies. The blood serum from 981 patients with suspected connective tissue systemic diseases, 115 patients with systemic lupus erythematous and 57 healthy individuals was analyzed. The levels of antinuclear factor, nuclear antigen antibodies and double-helical DNA antibodies were detected. The antinuclear factor was detected in 84% and 86% of cases, double-helical DNA antibodies in 55% and 39% of cases depending of reagents using in detecting these characteristics. Among healthy individuals, antinuclear factor was detected in 5% (1/20) of blood serum samples in titers less than 1:160. In the group of patients with suspected connective tissue systemic diseases, antinuclear factor was detected in 48% (474/981) of cases and extractable nuclear antigen in 20% (326/981) of cases. The Lineblott test was positive in 33% (326/981) of patients with suspected connective tissue systemic diseases. Among antinuclear factor positive patients nuclear antigen antibodies were detected in 36% (171/474) and the Lineblott test was positive in 63% (298/474) of cases. Among antinuclear factor negative patients but positive under anti-nuclear antigen identification, the Lineblott test was positive in 6% (28/507) of cases. The two-fold algorithm of nuclear antigen testing is an effective technique to be applied in the clinical diagnostic laboratory. The results of effectiveness of this algorithm demonstrated that this method can ensure 33% of cost savings of testing individuals with higher incidence of diseases. PMID:22416425

Lazareva, N M; Lapin, S V; Mazing, A V; Bulgakova, T V; Ilivanova, E P; Maslianski?, A L; Totolian, A A

2011-12-01

249

Diagnostic omission errors in acute paediatric practice: impact of a reminder system on decision-making  

PubMed Central

Background Diagnostic error is a significant problem in specialities characterised by diagnostic uncertainty such as primary care, emergency medicine and paediatrics. Despite wide-spread availability, computerised aids have not been shown to significantly improve diagnostic decision-making in a real world environment, mainly due to the need for prolonged system consultation. In this study performed in the clinical environment, we used a Web-based diagnostic reminder system that provided rapid advice with free text data entry to examine its impact on clinicians' decisions in an acute paediatric setting during assessments characterised by diagnostic uncertainty. Methods Junior doctors working over a 5-month period at four paediatric ambulatory units consulted the Web-based diagnostic aid when they felt the need for diagnostic assistance. Subjects recorded their clinical decisions for patients (differential diagnosis, test-ordering and treatment) before and after system consultation. An expert panel of four paediatric consultants independently suggested clinically significant decisions indicating an appropriate and 'safe' assessment. The primary outcome measure was change in the proportion of 'unsafe' workups by subjects during patient assessment. A more sensitive evaluation of impact was performed using specific validated quality scores. Adverse effects of consultation on decision-making, as well as the additional time spent on system use were examined. Results Subjects attempted to access the diagnostic aid on 595 occasions during the study period (8.6% of all medical assessments); subjects examined diagnostic advice only in 177 episodes (30%). Senior House Officers at hospitals with greater number of available computer workstations in the clinical area were most likely to consult the system, especially out of working hours. Diagnostic workups construed as 'unsafe' occurred in 47/104 cases (45.2%); this reduced to 32.7% following system consultation (McNemar test, p < 0.001). Subjects' mean 'unsafe' workups per case decreased from 0.49 to 0.32 (p < 0.001). System advice prompted the clinician to consider the 'correct' diagnosis (established at discharge) during initial assessment in 3/104 patients. Median usage time was 1 min 38 sec (IQR 50 sec – 3 min 21 sec). Despite a modest increase in the number of diagnostic possibilities entertained by the clinician, no adverse effects were demonstrable on patient management following system use. Numerous technical barriers prevented subjects from accessing the diagnostic aid in the majority of eligible patients in whom they sought diagnostic assistance. Conclusion We have shown that junior doctors used a Web-based diagnostic reminder system during acute paediatric assessments to significantly improve the quality of their diagnostic workup and reduce diagnostic omission errors. These benefits were achieved without any adverse effects on patient management following a quick consultation.

Ramnarayan, Padmanabhan; Winrow, Andrew; Coren, Michael; Nanduri, Vasanta; Buchdahl, Roger; Jacobs, Benjamin; Fisher, Helen; Taylor, Paul M; Wyatt, Jeremy C; Britto, Joseph

2006-01-01

250

Artificial neural network based fault diagnostic system for electric power distribution feeders  

Microsoft Academic Search

This paper describes the development of a fast, efficient, artificial neural network (ANN) based fault diagnostic system (FDS) for distribution feeders. The principal functions of this diagnostic system are: (i) detection of fault occurrence, (ii) identification of faulted sections, and (iii) classification of faults into types, e.g. HIFs (high impedance faults) or LIFs (low impedance faults). This has been achieved

E. A. Mohamed; N. D. Rao

1995-01-01

251

Information processing in biological systems  

SciTech Connect

This volume presents frontier research in information processing related to a variety of biological systems, including small assemblies of neurons in the cortex and large-scale metabolic systems; the statistics, dynamics, and phase transitions of stochastic information processing; and the microscopic-macroscopic interface in biological information processing. Physical principles and proteinoid experiments are discussed regarding the emergence of life and information and cause. The final paper offers a design for a one-dimensional brain.

Mintz, S.L.; Perlmutter, A.

1985-01-01

252

On-board fault diagnostics for fly-by-light flight control systems using neural network flight processors  

NASA Astrophysics Data System (ADS)

Fly-by-Light control systems offer higher performance for fighter and transport aircraft, with efficient fiber optic data transmission, electric control surface actuation, and multi-channel high capacity centralized processing combining to provide maximum aircraft flight control system handling qualities and safety. The key to efficient support for these vehicles is timely and accurate fault diagnostics of all control system components. These diagnostic tests are best conducted during flight when all facts relating to the failure are present. The resulting data can be used by the ground crew for efficient repair and turnaround of the aircraft, saving time and money in support costs. These difficult to diagnose (Cannot Duplicate) fault indications average 40 - 50% of maintenance activities on today's fighter and transport aircraft, adding significantly to fleet support cost. Fiber optic data transmission can support a wealth of data for fault monitoring; the most efficient method of fault diagnostics is accurate modeling of the component response under normal and failed conditions for use in comparison with the actual component flight data. Neural Network hardware processors offer an efficient and cost-effective method to install fault diagnostics in flight systems, permitting on-board diagnostic modeling of very complex subsystems. Task 2C of the ARPA FLASH program is a design demonstration of this diagnostics approach, using the very high speed computation of the Adaptive Solutions Neural Network processor to monitor an advanced Electrohydrostatic control surface actuator linked through a AS-1773A fiber optic bus. This paper describes the design approach and projected performance of this on-line diagnostics system.

Urnes, James M.; Cushing, John; Bond, William E.; Nunes, Steve

1996-10-01

253

The Process of Systemic Change  

ERIC Educational Resources Information Center

|This paper presents several brief papers about the process of systemic change. These are: (1) Step-Up-To-Excellence: A Protocol for Navigating Whole-System Change in School Districts by Francis M. Duffy; (2) The Guidance System for Transforming Education by Charles M. Reigeluth; (3) The Schlechty Center For Leadership In School Reform by Monica…

Duffy, Francis M.; Reigeluth, Charles M.; Solomon, Monica; Caine, Geoffrey; Carr-Chellman, Alison A.; Almeida, Luis; Frick, Theodore; Thompson, Kenneth; Koh, Joyce; Ryan, Christopher D.; DeMars, Shane

2006-01-01

254

Automated high-throughput flow-through real-time diagnostic system  

DOEpatents

An automated real-time flow-through system capable of processing multiple samples in an asynchronous, simultaneous, and parallel fashion for nucleic acid extraction and purification, followed by assay assembly, genetic amplification, multiplex detection, analysis, and decontamination. The system is able to hold and access an unlimited number of fluorescent reagents that may be used to screen samples for the presence of specific sequences. The apparatus works by associating extracted and purified sample with a series of reagent plugs that have been formed in a flow channel and delivered to a flow-through real-time amplification detector that has a multiplicity of optical windows, to which the sample-reagent plugs are placed in an operative position. The diagnostic apparatus includes sample multi-position valves, a master sample multi-position valve, a master reagent multi-position valve, reagent multi-position valves, and an optical amplification/detection system.

Regan, John Frederick

2012-10-30

255

ASIC design of a digital fuzzy system on chip for medical diagnostic applications.  

PubMed

The paper presents the ASIC design of a digital fuzzy logic circuit for medical diagnostic applications. The system on chip under consideration uses fuzzifier, memory and defuzzifier for fuzzifying the patient data, storing the membership function values and defuzzifying the membership function values to get the output decision. The proposed circuit uses triangular trapezoidal membership functions for fuzzification patients' data. For minimizing the transistor count, the proposed circuit uses 3T XOR gates and 8T adders for its design. The entire work has been carried out using TSMC 0.35 µm CMOS process. Post layout TSPICE simulation of the whole circuit indicates a delay of 31.27 ns and the average power dissipation of the system on chip is 123.49 mW which indicates a less delay and less power dissipation than the comparable embedded systems reported earlier. PMID:20703567

Roy Chowdhury, Shubhajit; Roy, Aniruddha; Saha, Hiranmay

2009-08-27

256

Development and testing of a diagnostic system for intelligen distributed control at EBR-2  

SciTech Connect

A diagnostic system is under development for demonstration of Intelligent Distributed Control at the Experimental Breeder Reactor (EBR--II). In the first phase of the project a diagnostic system is being developed for the EBR-II steam plant based on the DISYS expert systems approach. Current testing uses recorded plant data and data from simulated plant faults. The dynamical simulation of the EBR-II steam plant uses the Babcock and Wilcox (B W) Modular Modeling System (MMS). At EBR-II the diagnostic system operates in the UNIX workstation and receives live plant data from the plant Data Acquisition System (DAS). Future work will seek implementation of the steam plant diagnostic in a distributed manner using UNIX based computers and Bailey microprocessor-based control system. 10 refs., 6 figs.

Edwards, R.M.; Ruhl, D.W.; Klevans, E.H.; Robinson, G.E.

1990-01-01

257

Solar cell junction processing system  

Microsoft Academic Search

An integrated system and process for the continuous formation of p-n junctions in solar cells in a cost-effective manner and under computer control. The integrated system essentially comprises an ion beam implanter, an electron beam annealer and a combination vacuum lock-and-wafer transport system, all disposed within a unitary housing maintained under a common vacuum environment. The integrated system employs no

A. J. Armini; R. G. Little

1982-01-01

258

Construction of Bayesian networks for diagnostics  

Microsoft Academic Search

Bayesian networks have been proposed by many authors as the modeling technique of choice for the development of diagnostic systems. This paper describes a procedure for efficient creation of Bayesian networks for diagnostics. We have applied this procedure in diagnostic systems for diesel locomotives, satellite communication systems, and satellite testing equipment. We divide the process into several phases: problem decomposition,

K. Wojtek Przytula; Don Thompson

2000-01-01

259

Development and Integration of a Data Acquisition System for SST-1 Phase-1 Plasma Diagnostics  

NASA Astrophysics Data System (ADS)

Long pulse (of the order of 1000 s or more) SST-1 tokamak experiments demand a data acquisition system that is capable of acquiring data from various diagnostics channels without losing useful data (and hence physics information) while avoiding unnecessary generation of a large volume data. SST-1 Phase-1 tokamak operation has been envisaged with data acquisition of several essential diagnostics channels. These channels demand data acquisition at a sampling rate ranging from 1 kilo samples per second (KSPS) to 1 mega samples per second (MSPS). Considering the technical characteristics and requirements of the diagnostics, a data acquisition system based on PXI and CAMAC has been developed for SST-1 plasma diagnostics. Both these data acquisition systems are scalable. Present data acquisition needs involving slow plasma diagnostics are catered by the PXI based data acquisition system. On the other hand, CAMAC data acquisition hardware meets all requirements of the SST-1 Phase-1 fast plasma diagnostics channels. A graphical user interface for both data acquisition systems (PXI and CAMAC) has been developed using LabVIEW application development software. The collected data on the local hard disk are directly streaming to the central server through a dedicated network for post-shot data analysis. This paper describes the development and integration of the data acquisition system for SST-1 Phase-1 plasma diagnostics. The integrated testing of the developed data acquisition system has been performed using SST-1 central control and diagnostics signal conditioning units. In the absence of plasma shots, the integrated testing of the data acquisition system for the initial diagnostics of SST-1 Phase-1 operation has been performed with simulated physical signals. The primary engineering objective of this integrated testing is to validate the performance of the developed data acquisition system under simulated conditions close to that of actual tokamak operation. The data acquisition is synchronized with a clock and trigger provided by the central timing system.

Amit, K. Srivastava; Manika, Sharma; Imran, Mansuri; Atish, Sharma; Tushar, Raval; Subrata, Pradhan

2012-11-01

260

Monitoring system for the diagnostic of sparking in doubly-fed induction generators  

Microsoft Academic Search

A diagnostic strategy for the monitoring of the transmission properties and sparking of doubly-fed induction generators with slip rings is introduced in this paper. Modifications in the transmission properties can be recognized by measurement and evaluation of the rotor currents without additional sensors. The existing current transformers in the system can be used for the diagnostic

M. Wurfel; W. Hofmann

2005-01-01

261

Model selection for a medical diagnostic decision support system: a breast cancer detection case  

Microsoft Academic Search

There are a number of different quantitative models that can be used in a medical diagnostic decision support system (MDSS) including parametric methods (linear discriminant analysis or logistic regression), non-parametric models (K nearest neighbor, or kernel density) and several neural network models. The complexity of the diagnostic task is thought to be one of the prime determinants of model selection.

David West; Vivian West

2000-01-01

262

EULAR points to consider in the development of classification and diagnostic criteria in systemic vasculitis  

Microsoft Academic Search

ObjectivesThe systemic vasculitides are multiorgan diseases where early diagnosis and treatment can significantly improve outcomes. Robust nomenclature reduces diagnostic delay. However, key aspects of current nomenclature are widely perceived to be out of date, these include disease definitions, classification and diagnostic criteria. Therefore, the aim of the present work was to identify deficiencies and provide contemporary points to consider for

Neil Basu; Richard Watts; Ingeborg Bajema; Bo Baslund; Thorsten Bley; Maarten Boers; Paul Brogan; Len Calabrese; Maria C Cid; Jan Willem Cohen-Tervaert; Luis Felipe Flores-Suarez; Shouichi Fujimoto; Kirsten de Groot; Loic Guillevin; Gulen Hatemi; Thomas Hauser; David Jayne; Charles Jennette; Cees G M Kallenberg; Shigeto Kobayashi; Mark A Little; Alfred Mahr; John McLaren; Peter A Merkel; Seza Ozen; Xavier Puechal; Niels Rasmussen; Alan Salama; Carlo Salvarani; Caroline Savage; David G I Scott; Mårten Segelmark; Ulrich Specks; Cord Sunderköetter; Kazuo Suzuki; Vladimir Tesar; Allan Wiik; Hasan Yazici; Raashid Luqmani

2010-01-01

263

The application of expert systems and neural networks to gas turbine prognostics and diagnostics  

Microsoft Academic Search

Condition monitoring of engine gas generators plays an essential role in airline fleet management. Adaptive diagnostic systems are becoming available that interpret measured data, furnish diagnosis of problems, provide a prognosis of engine health for planning purposes, and rank engines for scheduled maintenance. More than four hundred operations worldwide currently use versions of the first or second generation diagnostic tools.

H. R. DePold; F. D. Gass

1999-01-01

264

Diagnoses and Presenting Symptoms in an Infant Psychiatry Clinic: Comparison of Two Diagnostic Systems.  

ERIC Educational Resources Information Center

|Objective: To present data from a general infant psychiatry clinic, including range and frequency of presenting symptoms, relationship between symptoms and diagnoses, and comparison of two diagnostic systems, DSM-IV and Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood (DC: 0-3). Method: A…

Frankel, Karen A.; Boyum, Lisa A.; Harmon, Robert J.

2004-01-01

265

Diagnostic Evaluation of Ozone Production and Horizontal Transport in a Regional Photochemical Air Quality Modeling System  

EPA Science Inventory

A diagnostic model evaluation effort has been performed to focus on photochemical ozone formation and the horizontal transport process since they strongly impact the temporal evolution and spatial distribution of ozone (O3) within the lower troposphere. Results from th...

266

Psychoacoustic Assessment of Speech Communication Systems. The Diagnostic Discrimination Test.  

ERIC Educational Resources Information Center

|The present report traces the rationale, development and experimental evaluation of the Diagnostic Discrimination Test (DDT). The DDT is a three-choice test of consonant discriminability of the perceptual/acoustic dimensions of consonant phonemes within specific vowel contexts. The DDT was created and developed in an attempt to provide a…

Grether, Craig Blaine

267

Topics in Mental Health Planning. Part II. A Review of Mental Health nd Mental Retardation Diagnostic Systems.  

National Technical Information Service (NTIS)

There are a great variety of reference diagnostic systems available for mental health and mental retardation. Presented here is a sample designed to facilitate some better understanding of these diagnostic systems and their specific uses, both to mental h...

R. F. Minnehan

1979-01-01

268

Medical diagnostic decision support systems--past, present, and future: a threaded bibliography and brief commentary.  

PubMed Central

Articles about medical diagnostic decision support (MDDS) systems often begin with a disclaimer such as, "despite many years of research and millions of dollars of expenditures on medical diagnostic systems, none is in widespread use at the present time." While this statement remains true in the sense that no single diagnostic system is in widespread use, it is misleading with regard to the state of the art of these systems. Diagnostic systems, many simple and some complex, are now ubiquitous, and research on MDDS systems is growing. The nature of MDDS systems has diversified over time. The prospects for adoption of large-scale diagnostic systems are better now than ever before, due to enthusiasm for implementation of the electronic medical record in academic, commercial, and primary care settings. Diagnostic decision support systems have become an established component of medical technology. This paper provides a review and a threaded bibliography for some of the important work on MDDS systems over the years from 1954 to 1993.

Miller, R A

1994-01-01

269

A fully automated in vitro diagnostic system based on magnetic tunnel junction arrays and superparamagnetic particles  

NASA Astrophysics Data System (ADS)

A fully automated in vitro diagnostic (IVD) system for diagnosing acute myocardial infarction was developed using high sensitivity MTJ array as sensors and nano-magnetic particles as tags. On the chip is an array of 12 × 106 MTJ devices integrated onto a 3 metal layer CMOS circuit. The array is divided into 48 detection areas, therefore 48 different types of bio targets can be analyzed simultaneously if needed. The chip is assembled with a micro-fluidic cartridge which contains all the reagents necessary for completing the assaying process. Integrated with electrical, mechanical and micro-fluidic pumping devices and with the reaction protocol programed in a microprocessor, the system only requires a simple one-step analyte application procedure to operate and yields results of the three major AMI bio-markers (cTnI, MYO, CK-MB) in 15 mins.

Lian, Jie; Chen, Si; Qiu, Yuqin; Zhang, Suohui; Shi, Stone; Gao, Yunhua

2012-04-01

270

Diagnosing diagnostic error.  

PubMed

Diagnostic errors are the most common errors in primary care. Diagnostic errors have been found to be the leading cause of malpractice litigation, accounting for twice as many claims and settled cases as medication errors. Diagnostic error is common, harmful, costly, and very critical to the patient-safety issues in health care. Diagnostic errors have received relatively little attention, however. Of what is known, diagnostic errors are an important source of preventable harm. Focused research in this area is highly needed because the causes of diagnostic errors are subtle and solutions are less obvious than for other types of errors. As opposed to medication errors, where the factors predisposing to their occurrence and the resultant preventive strategies are better defined, the relationship between factors influencing the diagnostic reasoning or decision making and a diagnostic error are not as clear. This may include any failure in timely access to care; elicitation or interpretation of symptoms, signs, or laboratory results, formulation and weighing of differential diagnosis; and timely follow-up and specialty referral or evaluation. The literature reveals that diagnostic errors are often caused by the combination of cognitive errors and system failure. Increased understanding about diagnostic decision making, sources of errors, and applying some existing strategies into clinical practice would help clinicians reduce these types of errors and encourage more optimal diagnostic processes. PMID:24070579

Thammasitboon, Satid; Thammasitboon, Supat; Singhal, Geeta

2013-10-01

271

In Depth Diagnostics for RF System Operation in the PEP-II B Factory  

SciTech Connect

The PEP-II RF systems incorporate numerous feedback loops in the low-level processing for impedance control and operating point regulation. The interaction of the multiple loops with the beam is complicated, and the systems incorporate online diagnostic tools to configure the feedback loops as well as to record fault files in the case of an RF abort. Rapid and consistent analysis of the RF-related beam aborts and other failures is critical to the reliable operation of the B-Factory, especially at the recently achieved high beam currents. Procedures and algorithms used to extract diagnostic information from time domain fault files are presented and illustrated via example interpretations of PEP-II fault file data. Example faults presented will highlight the subtle interpretation required to determine the root cause. Some such examples are: abort kicker firing asynchronously, klystron and cavity arcs, beam loss leading to longitudinal instability, tuner read back jumps and poorly configured low-level RF feedback loop.

Van Winkle, Daniel; Fox, John; Teytelman, Dmitry; /SLAC

2005-05-27

272

Multi-bunch instability diagnostics via digital feedback systems at PEP-II, DA?NE, ALS and SPEAR  

Microsoft Academic Search

Longitudinal feedback systems based on a common programmable DSP architecture have been commissioned at 4 laboratories. In addition to longitudinal feedback and beam diagnostics these flexible systems have been programmed to provide diagnostics for transverse motion. The diagnostic functions are based on transient domain techniques which record the response of every bunch while the feedback system manipulates the beam. Operational

J. Fox; R. Larsen; S. Prabhakar; D. Teytelman; A. Young; A. Drago; M. Serio; W. Barry; G. Stover

1999-01-01

273

Target diagnostic control system implementation for the National Ignition Facility (invited)  

NASA Astrophysics Data System (ADS)

The extreme physics of targets shocked by NIF's 192-beam laser is observed by a diverse suite of diagnostics. Many diagnostics are being developed by collaborators at other sites, but ad hoc controls could lead to unreliable and costly operations. A diagnostic control system (DCS) framework for both hardware and software facilitates development and eases integration. Each complex diagnostic typically uses an ensemble of electronic instruments attached to sensors, digitizers, cameras, and other devices. In the DCS architecture each instrument is interfaced to a low-cost WINDOWS XP processor and JAVA application. Each instrument is aggregated with others as needed in the supervisory system to form an integrated diagnostic. The JAVA framework provides data management, control services, and operator graphical user interface generation. DCS instruments are reusable by replication with reconfiguration for specific diagnostics in extensible markup language. Advantages include minimal application code, easy testing, and high reliability. Collaborators save costs by assembling diagnostics with existing DCS instruments. This talk discusses target diagnostic instrumentation used on NIF and presents the DCS architecture and framework.

Shelton, R. T.; Kamperschroer, J. H.; Lagin, L. J.; Nelson, J. R.; O'Brien, D. W.

2010-10-01

274

Use of the target diagnostic control system in the National Ignition Facility  

SciTech Connect

The extreme physics of targets shocked by NIF's 192-beam laser are observed by a diverse suite of diagnostics including optical backscatter, time-integrated, time resolved and gated X-ray sensors, laser velocity interferometry, and neutron time of flight. Diagnostics to diagnose fusion ignition implosion and neutron emissions have been developed. A Diagnostic Control System (DCS) for both hardware and software facilitates development and eases integration. Each complex diagnostic typically uses an ensemble of electronic instruments attached to sensors, digitizers, cameras, and other devices. In the DCS architecture each instrument is interfaced to a low-cost Window XP processor and Java application. Instruments are aggregated as needed in the supervisory system to form an integrated diagnostic. The Java framework provides data management, control services and operator GUI generation. During the past several years, over thirty-six diagnostics have been deployed using this architecture in support of the National Ignition Campaign (NIC). The DCS architecture facilitates the expected additions and upgrades to diagnostics as more experiments are performed. This paper presents the DCS architecture, framework and our experiences in using it during the NIC to operate, upgrade and maintain a large set of diagnostic instruments.

Shelton, R; Lagin, L; Nelson, J

2011-07-25

275

Target diagnostic control system implementation for the National Ignition Facility (invited)  

SciTech Connect

The extreme physics of targets shocked by NIF's 192-beam laser is observed by a diverse suite of diagnostics. Many diagnostics are being developed by collaborators at other sites, but ad hoc controls could lead to unreliable and costly operations. A diagnostic control system (DCS) framework for both hardware and software facilitates development and eases integration. Each complex diagnostic typically uses an ensemble of electronic instruments attached to sensors, digitizers, cameras, and other devices. In the DCS architecture each instrument is interfaced to a low-cost WINDOWS XP processor and JAVA application. Each instrument is aggregated with others as needed in the supervisory system to form an integrated diagnostic. The JAVA framework provides data management, control services, and operator graphical user interface generation. DCS instruments are reusable by replication with reconfiguration for specific diagnostics in extensible markup language. Advantages include minimal application code, easy testing, and high reliability. Collaborators save costs by assembling diagnostics with existing DCS instruments. This talk discusses target diagnostic instrumentation used on NIF and presents the DCS architecture and framework.

Shelton, R. T.; Kamperschroer, J. H.; Lagin, L. J.; Nelson, J. R.; O'Brien, D. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2010-10-15

276

Local area network for the plasma diagnostics system of MFTF-B  

SciTech Connect

The MFTF-B Plasma Diagnostics System will be implemented in stages, beginning with a start-up set of diagnostics and evolving toward a basic set. The start-up set contains 12 diagnostics which will acquire a total of about 800 Kbytes of data per machine pulse; the basic set contains 23 diagnostics which will acquire a total of about 8 Mbytes of data per pulse. Each diagnostic is controlled by a Foundation System consisting of a DEC LSI-11/23 microcomputer connected to CAMAC via a 5 Mbits/second serial fiber-optic link and connected to a supervisory computer (Perkin-Elmer 3250) via a 9600 baud RS232 link. The Foundation System is a building block used throughout MFTF-B for control and status monitoring. However, its 9600 baud link to the supervisor presents a bottleneck for the large data transfers required by diagnostics. To overcome this bottleneck the diagnostics Foundation Systems will be connected together with an additional LSI-11/23 called the master to form a Local Area Network (LAN) for data acquisition.

Lau, N.H.; Minor, E.G.

1983-01-01

277

Diagnostic interviews  

Microsoft Academic Search

This review addresses issues related to the use of structured psychiatric diagnostic interviews in children and adolescents.\\u000a Structured diagnostic interviews improve the diagnostic process by better organizing the collection of clinical data and eliminating\\u000a biases when applying diagnostic criteria. Available interviews generally fall into two categories. Highly structured (or respondent-based)\\u000a measures use a set script and record subject’s responses without

Ileana Calinoiu; Jon McClellan

2004-01-01

278

GIPSY: Groningen Image Processing System  

NASA Astrophysics Data System (ADS)

GIPSY is an acronym of Groningen Image Processing SYstem. It is a highly interactive software system for the reduction and display of astronomical data. It supports multi-tasking using a versatile user interface, it has an advanced data structure, a powerful script language and good display facilities based on the X Window system. GIPSY consists of a number of components which can be divided into a number of classes: The user interfaces. Currently two user interfaces are available; one for interactive work and one for batch processing. The data structure. The display utilities. The application programs. These are the majority of programs. GIPSY was designed originally for the reduction of interferometric data from the Westerbork Synthesis Radio Telescope, but in its history of more than 20 years it has grown to a system capable of handling data from many different instruments (e.g. TAURUS, IRAS etc.).

Allen, R. J.; Ekers, R. D.; Terlouw, J. P.; Vogelaar, M. G. R.

2011-09-01

279

Air purification system and process  

Microsoft Academic Search

An air purification system and process are provided that are capable of ensuring oil-free moisture-free and particulate- and microbial contaminant-free pharmaceutical quality air, the air purification system comprising, in combination, and in the sequence indicated: (1) an oil and water coalescer filter; (2) an adsorbent or desiccant dryer; (3) an oil vapor adsorber; (4) an after-filter; and (5) a bacterial-retentive

J. D. Miller; C. F. Seibert

1980-01-01

280

Performance optimization of a diagnostic system based upon a simulated strain field for fatigue damage characterization  

NASA Astrophysics Data System (ADS)

The work presented hereafter is about the development of a diagnostic system for crack damage detection, localization and quantification on a typical metallic aeronautical structure (skin stiffened through riveted stringers). Crack detection and characterization are based upon strain field sensitivity to damage. The structural diagnosis is carried out by a dedicated smart algorithm (Artificial Neural Network) which is trained on a database of Finite Element simulations relative to damaged and undamaged conditions, providing the system with an accurate predictor at low overall cost. The algorithm, trained on numerical damage experience, is used in a simulated environment to provide reliable preliminary information concerning the algorithm performances for damage diagnosis, thus further reducing the experimental costs and efforts associated with the development and optimization of such systems. The same algorithm has been tested on real experimental strain patterns acquired during real fatigue crack propagation, thus verifying the capability of the numerically trained algorithm for anomaly detection, damage assessment and localization on a real complex structure. The load variability, the discrepancy between the Finite Element Model and the real structure, and the uncertainty in the algorithm training process have been addressed in order to enhance the robustness of the system inference process. Some further algorithm training strategies are discussed, aimed at minimizing the risk for false alarms while maintaining a high probability of damage detection.

Sbarufatti, C.; Manes, A.; Giglio, M.

2013-11-01

281

Microwave tomography for GPR data processing in archaeology and cultural heritages diagnostics  

NASA Astrophysics Data System (ADS)

Ground Penetrating Radar (GPR) is one of the most feasible and friendly instrumentation to detect buried remains and perform diagnostics of archaeological structures with the aim of detecting hidden objects (defects, voids, constructive typology; etc..). In fact, GPR technique allows to perform measurements over large areas in a very fast way thanks to a portable instrumentation. Despite of the widespread exploitation of the GPR as data acquisition system, many difficulties arise in processing GPR data so to obtain images reliable and easily interpretable by the end-users. This difficulty is exacerbated when no a priori information is available as for example arises in the case of historical heritages for which the knowledge of the constructive modalities and materials of the structure might be completely missed. A possible answer to the above cited difficulties resides in the development and the exploitation of microwave tomography algorithms [1, 2], based on more refined electromagnetic scattering model with respect to the ones usually adopted in the classic radaristic approach. By exploitation of the microwave tomographic approach, it is possible to gain accurate and reliable "images" of the investigated structure in order to detect, localize and possibly determine the extent and the geometrical features of the embedded objects. In this framework, the adoption of simplified models of the electromagnetic scattering appears very convenient for practical and theoretical reasons. First, the linear inversion algorithms are numerically efficient thus allowing to investigate domains large in terms of the probing wavelength in a quasi real- time also in the case of 3D case also by adopting schemes based on the combination of 2D reconstruction [3]. In addition, the solution approaches are very robust against the uncertainties in the parameters of the measurement configuration and on the investigated scenario. From a theoretical point of view, the linear models allow further advantages such as: the absence of the false solutions (a question to be arisen in non linear inverse problems); the exploitation of well known regularization tools for achieving a stable solution of the problem; the possibility to analyze the reconstruction performances of the algorithm once the measurement configuration and the properties of the host medium are known. Here, we will present the main features and the reconstruction results of a linear inversion algorithm based on the Born approximation in realistic applications in archaeology and cultural heritage diagnostics. Born model is useful when penetrable objects are under investigations. As well known, the Born Approximation is used to solve the forward problem, that is the determination of the scattered field from a known object under the hypothesis of weak scatterer, i.e. an object whose dielectric permittivity is slightly different from the one of the host medium and whose extent is small in term of probing wavelength. Differently, for the inverse scattering problem, the above hypotheses can be relaxed at the cost to renounce to a "quantitative reconstruction" of the object. In fact, as already shown by results in realistic conditions [4, 5], the adoption of a Born model inversion scheme allows to detect, to localize and to determine the geometry of the object also in the case of not weak scattering objects. [1] R. Persico, R. Bernini, F. Soldovieri, "The role of the measurement configuration in inverse scattering from buried objects under the Born approximation", IEEE Trans. Antennas and Propagation, vol. 53, no.6, pp. 1875-1887, June 2005. [2] F. Soldovieri, J. Hugenschmidt, R. Persico and G. Leone, "A linear inverse scattering algorithm for realistic GPR applications", Near Surface Geophysics, vol. 5, no. 1, pp. 29-42, February 2007. [3] R. Solimene, F. Soldovieri, G. Prisco, R.Pierri, "Three-Dimensional Microwave Tomography by a 2-D Slice-Based Reconstruction Algorithm", IEEE Geoscience and Remote Sensing Letters, vol. 4, no. 4, pp. 556 - 560

Soldovieri, F.

2009-04-01

282

Planning for Stream Processing Systems  

Microsoft Academic Search

With the advent of compositional programming models in computer science, applying planning technologies to auto- matically build worko ws for solving large and complex problems in such a paradigm becomes not only technically appealing but also feasible approach. The application areas that will benet from automatic composition include, among others, Web services, Grid computing and stream processing systems. Although the

Anton Riabov; Zhen Liu

2005-01-01

283

Concurrent systems for knowledge processing  

Microsoft Academic Search

Actors have catalyzed the development of a new programming methodology and architecture for ultra-concurrent systems. This sourcebook on the development and impact of the actor paradigm brings together more than 20 milestone contributions on the actor concept and its application to knowledge processing. Each contribution is placed in its historical context and explained. This book is divided into four major

C. Hewitt; G. Agha

1989-01-01

284

A vibroacoustic diagnostic system as an element improving road transport safety.  

PubMed

Mechanical defects of a vehicle driving system can be dangerous on the road. Diagnostic systems, which monitor operations of electric and electronic elements and devices of vehicles, are continuously developed and improved, while defects of mechanical systems are still not managed properly. This article proposes supplementing existing on-board diagnostics with a system of diagnosing selected defects to minimize their impact. It presents a method of diagnosing mechanical defects of the engine, gearbox and other elements of the driving system on the basis of a model of the vibration signal obtained adaptively. This method is suitable for engine valves, engine head gasket, main gearbox, joints, etc. PMID:24034880

Komorska, Iwona

2013-01-01

285

Feasibility of millimeter wave diagnostics for coal conversion and combustion systems  

Microsoft Academic Search

The millimeter wave portion (30-300 GHz) of the electromagnetic spectrum, lying between the microwave and infrared regions, holds great potential for process diagnostics. In this report, the feasibility of millimeter wave (MMW) techniques is discussed for in-situ diagnostics of particulate-laden multiphase streams in coal conversion and combustion reactors\\/vessels. The techniques investigated include MMW spectroscopy for determination of molecular species and

N. Gopalsami; A. C. Raptis

1986-01-01

286

Laser-based systems for the structural diagnostic of artwork: an application to XVII-century Byzantine icons  

Microsoft Academic Search

Laser diagnostic systems based on shearography, vibrometry, and holography principles were employed to investigate the potential implementation of laser techniques in art conservation structural diagnostic field. The employed techniques offered the required measuring variability to allow a first discrimination on complex diagnostic uncertainties encountered often in art conservation. The systems were tested and used to assess the structural condition of

Vivi Tornari; Antonia Bonarou; Paolo Castellini; Enrico Esposito; Wolfgang Osten; Michael K. Kalms; Nikos Smyrnakis; Stergios Stasinopulos

2001-01-01

287

Active spectroscopic measurements using the ITER diagnostic system  

SciTech Connect

Active (beam-based) spectroscopic measurements are intended to provide a number of crucial parameters for the ITER device being built in Cadarache, France. These measurements include the determination of impurity ion temperatures, absolute densities, and velocity profiles, as well as the determination of the plasma current density profile. Because ITER will be the first experiment to study long timescale ({approx}1 h) fusion burn plasmas, of particular interest is the ability to study the profile of the thermalized helium ash resulting from the slowing down and confinement of the fusion alphas. These measurements will utilize both the 1 MeV heating neutral beams and a dedicated 100 keV hydrogen diagnostic neutral beam. A number of separate instruments are being designed and built by several of the ITER partners to meet the different spectroscopic measurement needs and to provide the maximum physics information. In this paper, we describe the planned measurements, the intended diagnostic ensemble, and we will discuss specific physics and engineering challenges for these measurements in ITER.

Thomas, D. M. [ITER Organization, 13067 St. Paul-lez-Durance Cedex (France); Counsell, G. [Fusion for Energy, 08019 Barcelona (Spain); Johnson, D. [US ITER Project Office, Oak Ridge, Tennessee 37830 (United States); Vasu, P. [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India); Zvonkov, A. [Russian Research Center ''Kurchatov Institute'', Moscow 123182 (Russian Federation)

2010-10-15

288

A Business Process Intelligence System for Enterprise Process Performance Management  

Microsoft Academic Search

Business process management systems traditionally focused on supporting the modeling and automation of business processes, with the objective of enabling fast and cost-effective process execution. As more and more processes become automated, customers become increasingly interested in managing process execution. This paper presents a set of concepts and a methodology toward business process intelligence (BPI) using dynamic process performance evaluation,

WenAn Tan; Weiming Shen; Lida Xu; Bosheng Zhou; Ling Li

2008-01-01

289

Eye tracking users of a visual diagnostic clinical decision support system to discover decision-making strategies and to inform user interface design.  

PubMed

Clinical decision support systems (CDSS) assist physicians and other medical professionals in tasks such as differential diagnosis. End users may use different decision-making strategies depending on medical training. Study of eye movements reveals information processing strategies that are executed at a level below consciousness. Eye tracking of student physician assistants and medical residents, while using a visual diagnostic CDSS in diagnostic tasks, showed adoption of distinct strategies and informed recommendations for effective user interface design. PMID:18999126

Haake, Anne R; Pelz, Jeff B; Smagner, Jessica; Colombo, Daniel; Lindsay, Laura; Papier, Art

2008-11-06

290

Network and service management and diagnostics solution of a remote patient monitoring system  

Microsoft Academic Search

We have developed a combined network and service management and diagnostics solution for our in- house developed remote patient monitoring system. The developed system has included into the ALPHA eHealth\\/remote patient monitoring system and was successfully used in our large Living Lab infrastructure operating in three different Hungarian regions with 40 patients. In this paper we will identify the key

Miklos Kozlovszky; Zsolt Meixner; Gergely Windisch; Judit Marton; Sandor Acs; Pal Bogdanov; Aniko Boruzs; Peter Kotcauer; Janos Ferenczi; Viktor Kozlovszky

2011-01-01

291

A pulsed-laser calibration system for the laser backscatter diagnostics at the Omega laser  

SciTech Connect

A calibration system has been developed that allows a direct determination of the sensitivity of the laser backscatter diagnostics at the Omega laser. A motorized mirror at the target location redirects individual pulses of a mJ-class laser onto the diagnostic to allow the in-situ measurement of the local point response of the backscatter diagnostics. Featuring dual wavelength capability at the 2nd and 3rd harmonic of the Nd:YAG laser, both spectral channels of the backscatter diagnostics can be directly calibrated. In addition, channel cross-talk and polarization sensitivity can be determined. The calibration system has been employed repeatedly over the last two years and has enabled precise backscatter measurements of both stimulated Brillouin scattering and stimulated Raman scattering in gas-filled hohlraum targets that emulate conditions relevant to those in inertial confinement fusion targets.

Neumayer, P; Sorce, C; Froula, D H; Rekow, V; Loughman, K; Knight, R; Glenzer, S H; Bahr, R; Seka, W

2009-10-09

292

A pulsed-laser calibration system for the laser backscatter diagnostics at the Omega laser  

SciTech Connect

A calibration system has been developed that allows a direct determination of the sensitivity of the laser backscatter diagnostics at the Omega laser. A motorized mirror at the target location redirects individual pulses of a millijoule-class laser onto the diagnostic to allow the in situ measurement of the local point response of the backscatter diagnostics. Featuring dual wavelength capability at the second and third harmonics of the Nd:YAG laser, both spectral channels of the backscatter diagnostics can be directly calibrated. In addition, channel cross-talk and polarization sensitivity can be determined. The calibration system has been employed repeatedly over the last two years and has enabled precise backscatter measurements of both stimulated Brillouin scattering and stimulated Raman scattering in gas-filled Hohlraum targets that emulate conditions relevant to those in inertial confinement fusion targets.

Neumayer, Paul; Sorce, Charles; Froula, Dustin H.; Divol, Laurent; Rekow, Vern; Loughman, Kevin; Knight, Russel; Glenzer, Siegfried H. [Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States); Bahr, Raymond; Seka, Wolf [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States)

2008-10-15

293

A pulsed-laser calibration system for the laser backscatter diagnostics at the Omega laser  

SciTech Connect

A calibration system has been developed that allows a direct determination of the sensitivity of the laser backscatter diagnostics at the Omega laser. A motorized mirror at the target location redirects individual pulses of a mJ-class laser onto the diagnostic to allow the in-situ measurement of the local point response of the backscatter diagnostics. Featuring dual wavelength capability at the 2nd and 3rd harmonic of the Nd:YAG laser, both spectral channels of the backscatter diagnostics can be directly calibrated. In addition, channel cross-talk and polarization sensitivity can be determined. The calibration system has been employed repeatedly over the last two years and has enabled precise backscatter measurements of both stimulated Brillouin scattering and stimulated Raman scattering in gas-filled hohlraum targets that emulate conditions relevant to those in inertial confinement fusion targets.

Neumayer, P; Sorce, C; Froula, D H; Rekow, V; Loughman, K; Knight, R; Glenzer, S H; Bahr, R; Seka, W

2008-04-29

294

An evidence-based diagnostic classification system for low back pain  

PubMed Central

Introduction: While clinicians generally accept that musculoskeletal low back pain (LBP) can arise from specific tissues, it remains difficult to confirm specific sources. Methods: Based on evidence supported by diagnostic utility studies, doctors of chiropractic functioning as members of a research clinic created a diagnostic classification system, corresponding exam and checklist based on strength of evidence, and in-office efficiency. Results: The diagnostic classification system contains one screening category, two pain categories: Nociceptive, Neuropathic, one functional evaluation category, and one category for unknown or poorly defined diagnoses. Nociceptive and neuropathic pain categories are each divided into 4 subcategories. Conclusion: This article describes and discusses the strength of evidence surrounding diagnostic categories for an in-office, clinical exam and checklist tool for LBP diagnosis. The use of a standardized tool for diagnosing low back pain in clinical and research settings is encouraged.

Vining, Robert; Potocki, Eric; Seidman, Michael; Morgenthal, A. Paige

2013-01-01

295

Contributions of Psychology to the Design of Diagnostic Decision Support Systems  

Microsoft Academic Search

\\u000a This paper describes how psychological research can contribute to the requirements engineering, the design and usefulness\\u000a of a Diagnostic Decision Support System (DDSS) intended to support pediatric residents’ diagnostic decisions. Research on\\u000a cognitive biases in Bayesian decision tasks is discussed. The design of the DDSS is briefly outlined, and a formative usefulness\\u000a test is reported. Under the assumption that a

Gitte Lindgaard; Janette Folkens; Catherine Pyper; Monique Frize; Robin Walker

296

A portable hardware-in-the-loop (HIL) device for automotive diagnostic control systems  

Microsoft Academic Search

In-vehicle driving tests for evaluating the performance and diagnostic functionalities of engine control systems are often time consuming, expensive, and not reproducible. Using a hardware-in-the-loop (HIL) simulation approach, new control strategies and diagnostic functions on a controller area network (CAN) line can be easily tested in real time, in order to reduce the effort and the cost of the testing

A. Palladino; G. Fiengo; D. Lanzo

297

Skin biopsy as an additional diagnostic tool in non-systemic vasculitic neuropathy  

Microsoft Academic Search

Sural nerve biopsy is considered mandatory for diagnosing non-systemic vasculitic neuropathy (NSVN). This invasive technique\\u000a may be associated with unpleasant sequelae and cannot easily be repeated. Skin punch biopsy from an affected area may be a\\u000a less invasive and repeatable diagnostic method. Here we assessed the potential diagnostic value of skin punch biopsies in\\u000a NSVN by analyzing skin biopsies in

Nurcan Üçeyler; Grazia Devigili; Klaus V. Toyka; Claudia Sommer

2010-01-01

298

Architecture for Survivable System Processing (ASSP)  

Microsoft Academic Search

The Architecture for Survivable System Processing (ASSP) Program is a multi-phase effort to implement Department of Defense (DOD) and commercially developed high-tech hardware, software, and architectures for reliable space avionics and ground based systems. System configuration options provide processing capabilities to address Time Dependent Processing (TDP), Object Dependent Processing (ODP), and Mission Dependent Processing (MDP) requirements through Open System Architecture

Richard J. Wood

1991-01-01

299

A hyperspectral imaging system for in vivo optical diagnostics  

Microsoft Academic Search

This paper details the basic principles and instrumental systems as well as applications of hyperspectral imaging system in the biomedical field. The development of an HSI system that combines recent advances in several photonic technologies, including an AOTF, a 2-D CCD detector, and imaging fiber optics. The integration of these technologies leads to a versatile and powerful imaging system that

Tuan Vo-Dinh; DAVID L. STOKES; MUSUNDI B. WABUYELE; MATT E. MARTIN; Joon Myong Song; RAMESH JAGANNATHAN; EDWARD MICHAUD; ROBERT J. LEE; Xiaogang Pan

2004-01-01

300

Toyota Hybrid Electric Vehicles (HEVs) Technical System Overview and Diagnostics  

NSDL National Science Digital Library

This resource contains two short courses created by Toyota Motors for training technicians on the operation and diagnosis of their HEVs. Of the two included courses, one is focused on the overview of HEV systems and the second is on HEV diagnosis. Each course is composed of individual modules that can also be taught separately with each containing lab activities and additional supplemental materials that can be used for presentations or student handouts. The first course is titled âHEV Overviewâ and includes the following modules: (1) Hybrid System Overview, (2) Hybrid System Operation, (3) High-Voltage Battery, (4) Engine, (5) Chassis, and (6) Body Electrical. The course is titled âHEV Diagnosisâ and includes the following modules: (1) Principals of Operations, (2)Engine Control System, (3) Fuel and EVAP System, (4) Hybrid Vehicle Control System, (5) High-Voltage Battery Control System, (6) Brake System, (7) Electric Power System, and (8) Other Systems.

Autoshop 101

301

Condensation Processes in Geothermal Systems  

NASA Astrophysics Data System (ADS)

We model condensation processes in geothermal systems to understand how this process changes fluid chemistry. We assume two processes operate in geothermal systems: 1) condensation of a vapor phase derived by boiling an aqueous geothermal fluid into a cool near surface water and 2) condensation of a magmatic vapor by a deep circulating meteoric thermal fluid. It is assumed that the condensation process has two stages. Initially the condensing fluid is under saturated in gaseous species. Condensation of the vapor phase continues until the pressure on the fluid equals the sum of the partial pressures of water and the dissolved gaseous species. At that time bubbles flux through the condensing fluid. In time the fluid and fluxing gas phase come to equilibrium. Calculation shows that during the second stage of the condensation process the liquid phase becomes enriched in more soluble gaseous species like CO2 and H2S, and depleted in less soluble species like CH4 and N2. Stage 2 condensation processes can therefore be monitored by ratios of more and less condensable species like CO2/N2. Condensation of vapor released by boiling geothermal fluids results in liquids with high concentrations of H2S and CO2 like is seen in geothermal system steam-heated waters. Condensation of a magmatic vapor into circulating meteoric water has been proposed, but not well demonstrated. We compare to our models the Cerro Prieto, Mexico gas analysis data set collected over twelve years time by USGS personnel. It was assumed for modeling that the Cerro Prieto geothermal fluids are circulating meteoritic fluids with N2/Ar ratios about 40 to which is added a magmatic vapor with N2/Ar ratio = 400. The Cerro Prieto analyses show a strong correlation between N2/Ar and CO2/N2 as predicted by calculation. Two dimensional image plots of well N2/Ar + CO2/N2 show a bull's-eye pattern on the geothermal field. Image plots of analyses collected over a year or less time show N2/Ar and CO2/N2 hot spots. Plotting data for individual wells show a hysteresis like loops on time vs. CO2/N2 diagrams. Our analysis demonstrates that condensation of magmatic vapor into convecting meteoric waters is a viable process. Condensation explains variations in Cerro Prieto geothermal system gas chemistry and is compatible with helium isotope data. Locally condensation appears to wax and wane over a time periods of about 10 years.

Norman, D. I.; Moore, J. N.

2005-12-01

302

Oil recovery process and system  

Microsoft Academic Search

An on-site, in-line process and system for recovering oil from oil-bearing subterranean formations which involves the production, modification, dilution and injection of a polymer solution, preferably consisting essentially of an aqueous solution of a partially hydrolyzed polyacrylamide, having injectivity and mobility properties capable of meeting the specific permeability requirements of substantially any subterranean formation to be achieved. The polymer solutions

P. A. Argabright; J. S. Rhudy

1985-01-01

303

Oil recovery process and system  

SciTech Connect

An on-site, in-line process and system for recovering oil from oil-bearing subterranean formations which involves the production, modification, dilution and injection of a polymer solution, preferably consisting essentially of an aqueous solution of a partially hydrolyzed polyacrylamide, having injectivity and mobility properties capable of meeting the specific permeability requirements of substantially any subterranean formation to be achieved. The polymer solutions prepared by the process and system can be used as drive fluids for displacing oil (secondary polymer flood) in an oil-bearing formation, as mobility buffers to follow micellar dispersion floods in the conjoint presence of chemical reagents in other chemical floods (e.g., surfactant, caustic, etc.), or they can follow a water flood. The solutions can also be used to promote pipelining of high viscosity crude oil. Irrespective of the use to which the solutions are put, the process and system enable the polymer solutions to be customized, or tailor-made, so to speak, to meet the performance demands of the environment in which they are to be used, whether it be an oil-bearing formation or a pipeline.

Argabright, P. A.; Rhudy, J. S.

1985-03-12

304

Digital signal processing of cylinder pressure data for combustion diagnostics of HCCI engine  

NASA Astrophysics Data System (ADS)

Diagnosis of combustion is necessary for the estimation of the combustion quality, and control of combustion timing in advanced combustion concepts like HCCI. Combustion diagnostics is often performed using digital processing of pressure signals measured using piezoelectric sensor installed in the combustion chamber of the engine. Four-step pressure signal processing consisting of (i) absolute pressure correction, (ii) phasing w.r.t. crank angle, (iii) cycle averaging and (iv) smoothening is used to get cylinder pressure data from the engine experiments, which is further analyzed to get information about combustion characteristics. This study focuses on various aspect of signal processing (cycle averaging and smoothing) of in-cylinder pressure signal from a HCCI engine acquired using a piezoelectric pressure sensor. Experimental investigations are conducted on a HCCI combustion engine operating at different engine speed/load/air-fuel ratio conditions. The cylinder pressure history of 3000 consecutive engine cycles is acquired for analysis using piezoelectric pressure sensor. This study determines the optimum number of engine cycles to be acquired for reasonably good pressure signals based on standard deviation of in-cylinder pressure, rate of pressure rise and rate of heat release signals. Different signal smoothening methods (using various digital filters) are also analyzed and their results are compared. This study also presents effect of signal processing methods on pressure, pressure rise rate and rate of heat release curves at different engine operating conditions.

Kumar Maurya, Rakesh; Pal, Dev Datt; Kumar Agarwal, Avinash

2013-03-01

305

Diagnostic expert-system for mechanical reliability in heavy trucks  

Microsoft Academic Search

An expert system for diagnosing rough ride problems in heavy trucks that can be used on a personal computer has been developed. The system operates on two levels of knowledge database; shallow (acquired from truck service experts with well-developed intuition) and causal (deep); obtained, e.g. from a multi-probe vibration analysis system or from any system testing the mechanical behavior of

Andrew H. Rawicz; Huang Xiao Jiang

1992-01-01

306

Correlation processing of polarization inhomogenous images in laser diagnostics of biological tissues  

NASA Astrophysics Data System (ADS)

The model of interaction of laser radiation with biological tissue as a two-component amorphous-crystalline matrix was proposed. The processes of formation of polarization of laser radiation are considered, taking into account birefringence network protein fibrils. Measurement of the coordinate distribution of polarization states in the location of the laser micropolarimetr was conducted .The results of investigating the interrelation between the values of correlation (correlation area, asymmetry coefficient and autocorrelation function excess) and fractal (dispersion of logarithmic dependencies of power spectra) parameters are presented. They characterize the coordinate distributions of polarization azimuth of laser images of histological sections of women's reproductive sphere tissues and pathological changes in human organism. The diagnostic criteria of the prolapse of the vaginal tissue arising are determined.

Trifonyuk, L.

2012-10-01

307

NDMAS System and Process Description  

SciTech Connect

Experimental data generated by the Very High Temperature Reactor Program need to be more available to users in the form of data tables on Web pages that can be downloaded to Excel or in delimited text formats that can be used directly for input to analysis and simulation codes, statistical packages, and graphics software. One solution that can provide current and future researchers with direct access to the data they need, while complying with records management requirements, is the Nuclear Data Management and Analysis System (NDMAS). This report describes the NDMAS system and its components, defines roles and responsibilities, describes the functions the system performs, describes the internal processes the NDMAS team uses to carry out the mission, and describes the hardware and software used to meet Very High Temperature Reactor Program needs.

Larry Hull

2012-10-01

308

Blast wave diagnostic for the petawatt laser system  

SciTech Connect

We report on a diagnostic to measure the trajectory of a blast wave propagating through a plastic target 400 {micro}m thick. This blast wave is generated by the irradiation of the front surface of the target with {approximately} 400 J of 1 {micro}m laser radiation in a 20 ps pulse focused to a {approximately} 50 {micro}m diameter spot, which produces an intensity in excess of 1O{sup 18} W/cm{sup 2}. These conditions approximate a point explosion and a blast wave is predicted to be generated with an initial pressure nearing 1 Gbar which decays as it travels approximately radially outward from the interaction region We have utilized streaked optical pyrometry of the blast front to determine its time of arrival at the rear surface of the target Applications of a self-similar Taylor-Sedov blast wave solution allows the amount of energy deposited to be estimated The experiment, LASNEX design simulations and initial results are discussed.

Budil, K. S., LLNL

1998-06-03

309

The pathologist and the diagnostic process. With a note on Edelman's Group Selection Theory and the Darwinian Computer.  

PubMed

In this well-detailed article, the author considers the diagnostic process phenomenologically (as it might be seen by an outsider observer) and goes on to consider the process from an aspect that is more interesting, more important, and much more difficult to understand: what goes on in a physician's mind as he makes a diagnosis. PMID:6734108

Beautyman, W

1984-03-01

310

Error diagnosting and selection in a training system for second language learning  

Microsoft Academic Search

A diagnosing procedure to be used in intelligent systems for language instruction is presented. Based on a knowledge representation scheme for a certain class of syntactic correctness conditions the system carries out a thorough analysis of possible error hypotheses and their consequences. A comparison with earlier attempts shows a clearly improved precision of diagnostic results. First of all, the procedure

Wolfgang Menzel

1988-01-01

311

An automatic monitoring and diagnostic system over a Virtual Organization for the accelerator science in Japan  

Microsoft Academic Search

The Virtual Organization (VO) called “PPJ - Particle Physics in Japan” for the accelerator science has been federated among domestic institutes. We have developed a monitoring and diagnostic system over this VO. The system is designed not only for checking site status but also for aiding site administrators by automatically navigating to appropriate documents in their site operation. We will

Go Iwai; Mineo Fujii; Tsutomu Koyama; Yasushi Nagasaka; Takashi Sasaki; Yoshiyuki Watase

2008-01-01

312

Ensemble strategies for a medical diagnostic decision support system: A breast cancer diagnosis application  

Microsoft Academic Search

The model selection strategy is an important determinant of the performance and acceptance of a medical diagnostic decision support system based on supervised learning algorithms. This research investigates the potential of various selection strategies from a population of 24 classification models to form ensembles in order to increase the accuracy of decision support systems for the early detection and diagnosis

David West; Paul Mangiameli; Rohit Rampal; Vivian West

2005-01-01

313

A framework for the design and development of diagnostic case-based reasoning systems  

Microsoft Academic Search

A Case-Based Reasoning System (CBR) supports reasoning from experience to solve decision problems, critique solutions, and explain anomalous situations. The issues encountered in the design and development of Case Based Reasoning (CBR) systems for ill-structured diagnostic decision problems include (1) the difficulty in describing a new case, (2) the effectiveness of retrieval of appropriate previous cases, and (3) the effectiveness

Kalyan Moy Gupta

1996-01-01

314

A framework for the design and development of diagnostic case-based reasoning systems  

Microsoft Academic Search

A Case-Based Reasoning System (CBR) supports reasoning from experience to solve decision problems, critique solutions, and explain anomalous situations. The issues encountered in the design and development of Case Based Reasoning (CBR) systems for ill-structured diagnostic decision problems include (1) the difficulty in describing a new case, (2) the effectiveness of retrieval of appropriate previous cases, and (3) the effectiveness

Kalyan Moy Gupta

1995-01-01

315

An integrated real-time diagnostic concept using expert systems, qualitative reasoning and quantitative analysis  

SciTech Connect

An approach for an integrated real-time diagnostic system is being developed for inclusion as an integral part of a power plant automatic control system. In order to participate in control decisions and automatic closed loop operation, the diagnostic system must operate in real-time. Thus far, an expert system with real-time capabilities has been developed and installed on a subsystem at the Experimental Breeder Reactor (EBR-II) in Idaho, USA. Real-time simulation testing of advanced power plant concepts at the Pennsylvania State University has been developed and was used to support the expert system development and installation at EBR-II. Recently, the US National Science Foundation (NSF) and the US Department of Energy (DOE) have funded a Penn State research program to further enhance application of real-time diagnostic systems by pursuing implementation in a distributed power plant computer system including microprocessor based controllers. This paper summarizes past, current, planned, and possible future approaches to power plant diagnostic systems research at Penn State. 34 refs., 9 figs.

Edwards, R.M.; Lee, K.Y.; Kumara, S.; Levine, S.H.

1989-01-01

316

A handheld point-of-care genomic diagnostic system.  

PubMed

The rapid detection and identification of infectious disease pathogens is a critical need for healthcare in both developed and developing countries. As we gain more insight into the genomic basis of pathogen infectivity and drug resistance, point-of-care nucleic acid testing will likely become an important tool for global health. In this paper, we present an inexpensive, handheld, battery-powered instrument designed to enable pathogen genotyping in the developing world. Our Microfluidic Biomolecular Amplification Reader (µBAR) represents the convergence of molecular biology, microfluidics, optics, and electronics technology. The µBAR is capable of carrying out isothermal nucleic acid amplification assays with real-time fluorescence readout at a fraction of the cost of conventional benchtop thermocyclers. Additionally, the µBAR features cell phone data connectivity and GPS sample geotagging which can enable epidemiological surveying and remote healthcare delivery. The µBAR controls assay temperature through an integrated resistive heater and monitors real-time fluorescence signals from 60 individual reaction chambers using LEDs and phototransistors. Assays are carried out on PDMS disposable microfluidic cartridges which require no external power for sample loading. We characterize the fluorescence detection limits, heater uniformity, and battery life of the instrument. As a proof-of-principle, we demonstrate the detection of the HIV-1 integrase gene with the µBAR using the Loop-Mediated Isothermal Amplification (LAMP) assay. Although we focus on the detection of purified DNA here, LAMP has previously been demonstrated with a range of clinical samples, and our eventual goal is to develop a microfluidic device which includes on-chip sample preparation from raw samples. The µBAR is based entirely around open source hardware and software, and in the accompanying online supplement we present a full set of schematics, bill of materials, PCB layouts, CAD drawings, and source code for the µBAR instrument with the goal of spurring further innovation toward low-cost genetic diagnostics. PMID:23936402

Myers, Frank B; Henrikson, Richard H; Bone, Jennifer; Lee, Luke P

2013-08-01

317

Early evaluation of a second generation information monitoring and diagnostic system  

SciTech Connect

Private sector commercial office buildings are challenging environments for energy efficiency projects. This challenge is related to the complexity of business environments that involve ownership, operation, and tenant relationships. Whether it is poor quality design, inefficient operations, degradation of equipment over time, or merely the increasing use of energy by tenants and inattention from landlords, commercial office building energy use continues to increase. This research project was developed to examine the environment for building operations and identify causes of inefficient use of energy related to technical and organizational issues. This report discusses a second-generation Information Monitoring and Diagnostic System (IMDS) installed at a leased office building in Sacramento, California. The report begins with a brief summary of the IMDS research at the previous building, followed by a discussion of the building selection process, the IMDS design and installation, recent use of the IMDS, costs and benefits, and fault detection and diagnostic research using the IMDS. A web site describes the IMDS in detail (see imds.lbl.gov). The underlying principle of this research project is that high quality building performance data can help show where energy is being used and how buildings systems actually perform is an important first step toward improving building energy efficiency. The project utilizes a high-quality monitoring system that has been developed during the past decade by a partnership between LBNL and private industry. This research project has been successful in demonstrating that the IMDS is tremendously valuable to the building operators at the Sacramento site. The building operators not only accept the technology, but it has become the core of their day-to-day building control concepts. The innovative property management company, Jones Lang LaSalle, is interested in installing more sites to determine if the system could provide an economic platform for regional operations. One objective of this project was to install the IMDS and evaluate the costs and benefits of its use. The costs have been evaluated. The system cost about $0.70 per square foot, which includes the design, hardware, software, and installation, which is about 30% lower than the previous system in San Francisco. A number of operational problems have been identified with the IMDS as described in the report. Potential energy savings from addressing problems identified by the application of the IMDS have not yet been quantified, although the IMDS has been an important tool to the operations staff to help better assess planned future retrofits.

Piette, Mary Ann; Kinney, Satkartar; Bourassa, Norman; Xu, Peng; Haves, Philip; Kinney, Kristopher; Shockman, Christine

2002-03-25

318

Diagnostic Assessment of Troubleshooting Skill in an Intelligent Tutoring System.  

ERIC Educational Resources Information Center

|This paper lays out the rationale and implementation of student modeling and updating in the HYDRIVE intelligent tutoring system (ITS) for aircraft hydraulic systems. An epistemic level of modeling concerns the plans and goals students are using to guide their problem solving, as inferred from specific actions in specific contexts. These results…

Gitomer, Drew H.; And Others

319

Educational Knowledge Based System Design Using a Diagnostic Approach  

Microsoft Academic Search

In this paper we explain how we use formative evaluation tools to represent items of knowledge and the ties between these items. The expert system thinks using for that Prolog relations corresponding to many tables. The system has many knowledge bases related to formative evaluation and a global knowledge base which has more general knowledge about the psychology of learning

Marie-michèle Boulet; L. Lavoie; P. Labbé; S. Slobodrian; L. Barbeau

1989-01-01

320

Application of the Digraph Method in System Fault Diagnostics  

Microsoft Academic Search

There is an increasing demand for highly reliable systems in the safety conscious climate of today's world. When a fault does occur there are two desirable outcomes. Firstly, detection is required to discover whether functionality at a pre-determined level can be maintained and secondly, a necessary repair strategy is sought to minimise system disruption. Traditional focus on fault diagnosis has

E. M. Kelly; L. M. Bartlett

2006-01-01

321

Expert diagnostic system for moving-coil loudspeakers using nonlinear modeling.  

PubMed

This work aims at the development of an expert diagnostic system for moving-coil loudspeakers. Special emphasis is placed on the defects resulting from loudspeaker nonlinearities. As a loudspeaker operates in the large signal domain, nonlinear distortions may arise and impair sound quality. Analysis of nonlinear responses can shed light on potential design faults of a loudspeaker. By exploiting this fact, this expert diagnostic system enables classification of design faults using a defect database alongside an intelligent fault inference module. Six types of defects are investigated in this paper. A large signal model based on electromechanical analogous circuits is employed for generating the defect database, through which a neural-fuzzy network is utilized for inferring the defect types. Numerical simulations and experimental investigations were undertaken for validating the loudspeaker diagnostic system. PMID:19206859

Bai, Mingsian R; Huang, Chau-Min

2009-02-01

322

Application of the Interactive Graphic Devices in the Image Processing System on the Base of the HPD Automatic Scanning Devices.  

National Technical Information Service (NTIS)

Application of the interactive graphic devices is considered as used in a system of processing images from bubble chambers based on HPD automatic devices. Dialogue devices of the system are used for adjusting, serviceability control and diagnostics of equ...

A. A. Borovikov V. V. Bryzgalov S. A. Gumenyuk L. F. Zajtsev V. V. Smirnova

1983-01-01

323

ETHERNET BASED EMBEDDED SYSTEM FOR FEL DIAGNOSTICS AND CONTROLS  

SciTech Connect

An Ethernet based embedded system has been developed to upgrade the Beam Viewer and Beam Position Monitor (BPM) systems within the free-electron laser (FEL) project at Jefferson Lab. The embedded microcontroller was mounted on the front-end I/O cards with software packages such as Experimental Physics and Industrial Control System (EPICS) and Real Time Executive for Multiprocessor System (RTEMS) running as an Input/Output Controller (IOC). By cross compiling with the EPICS, the RTEMS kernel, IOC device supports, and databases all of these can be downloaded into the microcontroller. The first version of the BPM electronics based on the embedded controller was built and is currently running in our FEL system. The new version of BPM that will use a Single Board IOC (SBIOC), which integrates with an Field Programming Gate Array (FPGA) and a ColdFire embedded microcontroller, is presently under development. The new system has the features of a low cost IOC, an open source real-time operating system, plug&play-like ease of installation and flexibility, and provides a much more localized solution.

Jianxun Yan; Daniel Sexton; Steven Moore; Albert Grippo; Kevin Jordan

2006-10-24

324

Comparison and Applications of DPV-2000 and Accuraspray-g3 Diagnostic Systems  

NASA Astrophysics Data System (ADS)

Comparative in-flight measurements of particles plasma sprayed by F4 and Triplex II guns were carried out using the diagnostic systems DPV-2000 and Accuraspray-g3. The comparison of mean particle velocities and temperatures as well as intensity profiles of the plume show a good agreement confirming their accuracy. However, the varying operating principles especially the deceased dimensions of the measurement volumes have to be considered carefully when evaluating the results. Furthermore, some applications of the diagnostic systems DPV-2000 and Accuraspray-g3 are shown. Finally some application limits, which were identified for certain powder compositions at higher plasma power levels will be discussed.

Mauer, Georg; Vaßen, Robert; Stöver, Detlev

2007-09-01

325

TPX diagnostics for tokamak operation, plasma control and machine protection  

SciTech Connect

The diagnostics for TPX are at an early design phase, with emphasis on the diagnostic access interface with the major tokamak components. Account has to be taken of the very severe environment for diagnostic components located inside the vacuum vessel. The placement of subcontracts for the design and fabrication of the diagnostic systems is in process.

Edmonds, P.H. [Texas Univ., Austin, TX (United States). Fusion Research Center; Medley, S.S.; Young, K.M. [Princeton Univ., NJ (United States). Plasma Physics Lab.] [and others

1995-08-01

326

System for processing program information  

US Patent & Trademark Office Database

To provide a system for processing program information in which the display structure of a program table can be freely changed in accordance with a requirement of or the taste of an audience, the system for processing program information is structured to include program information storage means 1 for storing program information, and program table display means 4 for two-dimensionally displaying a program table employing as the two axes, two attributes 102 and 103 selected from among all of the attributes that have been given to each piece of program information, to make the program table 101. For the audience, program tables of various constructions can be displayed on the display means at will and in respective program retrieval operations, a program table that is easy to use to search for a program can be obtained. An specific desired program can be found in a short time by selecting key word(s) related to each program and extracting them from the program or the like. This is useful for an audience member to make a plan of desired broadcasts for himself.

2006-05-16

327

Diagnostic decision support system with condition indexing for asset managers of electrical infrastructures  

Microsoft Academic Search

Maintenance decisions for high voltage assets are usually based on experience and failure statistics, however often too low sample sizes are available. On the one hand failure data do show that aging processes proceed inevitably in network components during a certain period of time before failure. Therefore diagnostic tools to assess the condition of high voltage components are very useful

Johan J. Smit; Oscar M. Piepers; Edward Gulski

2007-01-01

328

A Systematic Review of Clinical Diagnostic Systems Used in the Diagnosis of Tuberculosis in Children  

PubMed Central

Background. Tuberculosis (TB) is difficult to diagnose in children due to lack of a gold standard, especially in resource-limited settings. Scoring systems and diagnostic criteria are often used to assist in diagnosis; however their validity, especially in areas with high HIV prevalence, remains unclear. Methods. We searched online bibliographic databases, including MEDLINE and EMBASE. We selected all studies involving scoring systems or diagnostic criteria used to aid in the diagnosis of tuberculosis in children and extracted data from these studies. Results. The search yielded 2261 titles, of which 40 met selection criteria. Eighteen studies used point-based scoring systems. Eighteen studies used diagnostic criteria. Validation of these scoring systems yielded varying sensitivities as gold standards used ranged widely. Four studies evaluated and compared multiple scoring criteria. Ten studies selected for pulmonary tuberculosis. Five studies specifically evaluated the use of scoring systems in HIV-positive children, generally finding the specificity to be lower. Conclusions. Though scoring systems and diagnostic criteria remain widely used in the diagnosis of tuberculosis in children, validation has been difficult due to lack of an established and accessible gold standard. Estimates of sensitivity and specificity vary widely, especially in populations with high HIV co-infection.

Pearce, Emily C.; Woodward, Jason F.; Nyandiko, Winstone M.; Vreeman, Rachel C.; Ayaya, Samuel O.

2012-01-01

329

Different letter-processing strategies in diagnostic subgroups of developmental dyslexia.  

PubMed

Normally reading adults (N = 15) and primary school children (N = 24) and two diagnostic subgroups of children with developmental dyslexia (N = 21)-all native German speakers-performed a successive same-different task with pairs of letters and nonletters (pseudoletters or geometrical shapes). The first item of a pair was always presented on its own, and the second either on its own or surrounded by a congruent or incongruent nontarget shape. Adults showed congruence effects with nonletters but not with letters, and children with both types of stimuli. Frequent-word reading-impaired dyslexics (N = 11) in addition showed dramatically slower overall reaction times. Nonword reading-impaired dyslexics (N = 10) showed congruence effects with nonletters but negative congruence effects with letters. The results support the notion that normal readers have established a special visual processing strategy for letters. Processing speed rather than reading expertise seems crucial for this strategy to emerge. The contrasting effects between subgroups of dyslexics reveal specific underlying deficits. PMID:18671156

Lachmann, Thomas; van Leeuwen, Cees

2008-07-31

330

Navigating the diagnostics career labyrinth  

Microsoft Academic Search

Integrated diagnostics is a career field for which there currently exists no standard set of basic qualifications, few educational opportunities to study at the university level, no clear processes within most organizations for practicing integrated diagnostics as a systems engineering activity and often no uniform method of sharing techniques and lessons learned with new employees. Several authors have stated the

Russell Shannon; J. Quiter

2007-01-01

331

Megahertz pulse-burst alexandrite laser diagnostic systems  

NASA Astrophysics Data System (ADS)

Megahertz pulse-burst laser systems coupled with megahertz-rate framing cameras have proven (over the last ten years) to be very robust in imaging of high-speed reacting and nonreacting supersonic flows. These Nd:YAG systems produce 20--30 pulses (at variable rates from 500 kHz to 1 MHz) with 50--100 mJ/pulse (lambda = 1064nm) and have been used with narrow, spectral-linewidth, iodine, atomic filters to image turbulence in supersonic boundary layers with great success (when operating at lambda = 532nm). To extend this pulse-burst capability at other wavelengths (wavelengths outside of the 5--30 GHz tuning range of Nd:YAG: lambda = 1064 nm fundamental, and lambda = 532 nm second harmonic), two unique, tunable, megahertz-rate alexandrite laser systems were designed and built. This dissertation documents these two systems and discusses the potential for tunable, megahertz, pulse-burst systems that have more tuning range than Nd:YAG. These tunable alexandrite systems substantially extend the wavelength range of pulse-burst laser technology, but, to date, have pulse-energy limitations. Tunable from 710 nm to 800 nm (in the fundamental), these lasers provide researchers one laser to reach multiple molecular or atomic resonances with variable pulse-burst pulse separations. The molecular and atomic species of interest in reacting and nonreacting flows are presented in Chapter 1, providing a road-map for the development of these tunable lasers. This dissertation presents the design and development of these systems, including mode control, Herriott cell design for pulse separation, and the megahertz-tuning ringmaster-oscillator. Chapter 2 covers the physics of alexandrite as a solid-state, lamp-pumped, tunable medium and compares it to the tunability of Ti:sapphire. Chapter 3 and 4 present the pulse-burst alexandrite systems. The first system, built in Princeton's Applied Physics group (PAPG) (Chapter 3), produced 1-5 mJ total pulse-packet energy of 20--30 pulses, or approximately 100 muJ per pulse at lambda = 761 nm. The second system, built at Princeton Plasma Physics Labs (PPPL) (Chapter 4), produced pulse-bursts of 3--10 pulses with pulse power of 5--10 mJ/pulse at the fundamental wavelength of 758 nm. The spectral linewidths varied throughout the development of the two systems. Two different master-oscillator configurations were used, one linear, with a standing wave, and one ring, with a unidirectional wave. Using a linear, master-oscillator with double inter-cavity Fabry-Perot etalons, the PPPL pulse-burst system achieved 0.3A linewidth and limited tuning capability (limited by the tuning resolution of the inter-cavity, 9-plate, birefringent tuner). This made the system appropriate for laser induced fluorescence (LIF) studies of plasma turbulence, but, not sufficient for filtered Rayleigh scattering. The linear oscillator for the PAPG system achieved linewidths on the order of 1A (by way of a 4-plate, birefringent tuner). PAPG's system was designed with a Sacher diode-seeding system to decrease the linewidth to under 1 GHz (i.e., 0.002A) by way of cavity seeding, however, the linear oscillator did not reliably mode-lock. To achieve mode-locked, mode-hop-free tuning on the order of 30 GHz with a 88 MHz linewidth pulse, the master oscillator was configured and built as a mode-locked, diode-injection-seeded, alexandrite ring-cavity with "rapid-ramp" cavity length stabilization (RCLS) technology. Chapter 5 and Chapter 6 present the design and performance of the unidirectional-wave, alexandrite ring laser. The mode-locked, alexandrite, ring laser's piezo modulation system and driver are presented in this thesis, along with experimental results which focus on spectral linewidth and spectral-purity characterization, using an atomic potassium filter at lambda = 766.701 nm and atomic rubidium filter at lambda = 780.2445 nm (vacuum wavelengths) for the alexandrite ring in single-pulse mode. These atomic, vapor-cell, experimental-scan results document the reliability and tunability of the ring as a master oscillator for the

Luff, Jon David

332

Developmental trauma disorder: pros and cons of including formal criteria in the psychiatric diagnostic systems  

PubMed Central

Background This article reviews the current debate on developmental trauma disorder (DTD) with respect to formalizing its diagnostic criteria. Victims of abuse, neglect, and maltreatment in childhood often develop a wide range of age-dependent psychopathologies with various mental comorbidities. The supporters of a formal DTD diagnosis argue that post-traumatic stress disorder (PTSD) does not cover all consequences of severe and complex traumatization in childhood. Discussion Traumatized individuals are difficult to treat, but clinical experience has shown that they tend to benefit from specific trauma therapy. A main argument against inclusion of formal DTD criteria into existing diagnostic systems is that emphasis on the etiology of the disorder might force current diagnostic systems to deviate from their purely descriptive nature. Furthermore, comorbidities and biological aspects of the disorder may be underdiagnosed using the DTD criteria. Summary Here, we discuss arguments for and against the proposal of DTD criteria and address implications and consequences for the clinical practice.

2013-01-01

333

[Content-based image-retrieval system - development, usefulness and perspectives of diagnostic assistant robot].  

PubMed

In recent years, diagnostic imaging modalities have proliferated from standard X-ray to CT, MRI and PET, and the working environments of radiologists have changed greatly with the popular spread of the PACS system. Radiologists are now facing enormous duties due to the dramatic increase in the volume of images from various modalities, and the shortage of radiologists in Japan has reached near-crisis levels. Furthermore, it is difficult to gain the knowledge needed to interpret diagnostic imaging and modalities under the growing, increasingly diverse and complex modalities and methods, for general physicians and trainees. On the other hand, there are some computer-aided diagnosis and detection systems that support radiologists. Here, we introduce a new diagnostic assistant robot that automatically retrieves cases on record that are similar to new cases, helps in making diagnoses, and can create CT reports semi-automatically, using an existing past CT database of pulmonary nodules with a structured report. PMID:22790038

Endo, Masahiro; Aramaki, Takeshi; Moriguchi, Michihisa; Sawada, Akihiro; Asakura, Koiku; Bekku, Emima; Yamaguchi, Ken

2012-07-01

334

Portable 3D/4D Ultrasound Diagnostic Imaging System.  

National Technical Information Service (NTIS)

The rapid diagnosis of invisible internal injury in an austere and hostile front-line operational environment remains a challenge for (Canadian Forces) medical and search and rescue personnel. The availability of a portable 4D-ultrasound imaging system wi...

P. Shek S. Stergiopoulos

2010-01-01

335

Development of a system to provide diagnostics-while-drilling.  

SciTech Connect

This report describes development of a system that provides high-speed, real-time downhole data while drilling. Background of the project, its benefits, major technical challenges, test planning, and test results are covered by relatively brief descriptions in the body of the report, with some topics presented in more detail in the attached appendices.

Wise, Jack LeRoy; Jacobson, Ronald David; Finger, John Travis; Mansure, Arthur James; Knudsen, Steven Dell

2003-06-01

336

Model-based diagnostics of gas turbine engine lubrication systems  

Microsoft Academic Search

The objective of the current research was to develop improved methodology for diagnosing anomalies and maintaining oil lubrication systems for gas turbine engines. The effort focused on the development of reasoning modules that utilize the existing, inexpensive sensors and are applicable to on-line monitoring within the full-authority digital engine controller (FADEC) of the engine. The target application is the Enhanced

Byington

1998-01-01

337

Automatic diagnostic system for measuring ocular refractive errors  

Microsoft Academic Search

Ocular refractive errors (myopia, hyperopia and astigmatism) are automatic and objectively determined by projecting a light target onto the retina using an infra-red (850 nm) diode laser. The light vergence which emerges from the eye (light scattered from the retina) is evaluated in order to determine the corresponding ametropia. The system basically consists of projecting a target (ring) onto the

Liliane Ventura; Caio Chiaradia; Sidney J. de Faria E. Sousa; Jarbas C. de Castro

1996-01-01

338

A Universal Fault Diagnostic Expert System Based on Bayesian Network  

Microsoft Academic Search

Fault diagnosis is an area of great concern of any industry to reduce maintenance cost and increase profitability in the mean time. But most of the researches tend to rely on sensor data and equipment structure, which are expensive because each category of equipment differs from the others. Thus developing a universal system remains a key challenge to be solved.

Ting Han; Bo Li; Limei Xu

2008-01-01

339

Effects on operators' problem solving behaviour when using a diagnostic rule-based expert system developed for the nuclear industry  

Microsoft Academic Search

The authors describe an experiment conducted at the OECD Halden Reactor Project, Halden, Norway, to assess the effect on the diagnostic behaviour of nuclear power plant operators when using a rule-based diagnostic expert system. The rule-based expert system used is called DISKET (Diagnosis System Using Knowledge Engineering Technique). The experiment used a full scope pressurized water reactor simulator. Operator performance

Tor Endestad; C. B. O. Holmstroem; F. S. Volden

1992-01-01

340

Evaluation of the Diagnostic Capabilities of Commercial Intrusion Detection Systems  

Microsoft Academic Search

Proceedings of the 5th symposium on Recent Advances in Intrusion Detection (RAID 2002), Zurich, Switzerland, October 2002. Springer LNCS 2516, pages 115-137 This paper describes a testing environment for commercial intrusion-detection systems, shows results of an actual test run and presents a number of conclusions drawn from the tests. Our test environment currently focuses on IP denial-of-service attacks, Trojan horse

Hervé Debar; Benjamin Morin

2002-01-01

341

DEVELOPMENT OF PROTOTYPE PROCESS SYSTEMS FOR OMR  

Microsoft Academic Search

Three pilot plant process systems were operated to provide engineering ; data for the design of Advanced Organic Moderated Reactor (AOMR) processing ; systems. The performance of purification, degasification, and waste gas and ; water treatment systems was studied and compared with expected performance. The ; systems were previously constructed and evaluated as part of the Piqua OMR ; process

W. N. Bley; J. A. Vanderlip; R. R. Stiens

1962-01-01

342

The Introduction of a Diagnostic Decision Support System (DXplain™) into the workflow of a teaching hospital service can decrease the cost of service for diagnostically challenging Diagnostic Related Groups (DRG)s  

PubMed Central

Background In an era of short inpatient stays, residents may overlook relevant elements of the differential diagnosis as they try to evaluate and treat patients. However, if a resident’s first principal diagnosis is wrong, the patient’s appropriate evaluation and treatment may take longer, cost more, and lead to worse outcomes. A diagnostic decision support system may lead to the generation of a broader differential diagnosis that more often includes the correct diagnosis, permitting a shorter, more effective, and less costly hospital stay. Methods We provided residents on General Medicine services access to DXplain, an established computer-based diagnostic decision support system, for 6 months. We compared charges and cost of service for diagnostically challenging cases seen during the fourth through sixth month of access to DXplain (intervention period) to control cases seen in the six months before the system was made available. Results 564 cases were identified as diagnostically challenging by our criteria during the intervention period along with 1173 cases during the control period. Total charges were $1281 lower (P=.006), Medicare Part A charges $1032 lower (p=.006) and cost of service $990 lower (P=.001) per admission in the intervention cases than in control cases. Conclusions Using DXplain on all diagnostically challenging cases might save our medical center over $2,000,000 a year on the General Medicine Services alone. Using clinical diagnostic decision support systems may improve quality and decrease cost substantially at teaching hospitals.

Elkin, Peter L.; Liebow, Mark; Bauer, Brent A.; Chaliki, Swarna; Wahner-Roedler, Dietlind; Bundrick, John; Lee, Mark; Brown, Steven H.; Froehling, David; Bailey, Kent; Famiglietti, Kathleen; Kim, Richard; Hoffer, Ed; Feldman, Mitchell; Barnett, G. Octo

2010-01-01

343

Development of dosimetry using detectors of diagnostic digital radiography systems  

SciTech Connect

Dosimetry using an imaging plate (IP) of computed radiography (CR) systems was developed for quality control of output of the x-ray equipment. Sensitivity index, or the S number, of the CR systems was used for estimating exposure dose under the routine condition: exposure dose from 1.0 to 1.0x10{sup 2} {mu}C kg{sup -1}, tube voltages from 50 to 120 kV, and added filtration from 0 to 4.0 mm Al. The IP was calibrated by using a 6 cc ionization chamber having traceability to the National Standard Ionization Chamber. The uncertainty concerning the fading effect was suppressed less than 1.9% by reading the latent image 4 min{+-}5 s after irradiation at the room temperature 25.9{+-}1.0 degree sign C. The S number decreased linearly on the logarithmic graph regardless of the beam quality as exposure dose increased. The relationship between the exposure dose (E) and the S number was fitted by the equation E=a{sup '}xS{sup -b}. The coefficient a{sup '} decreased when the added filtration and the tube voltage were increased. The coefficient b was 0.977{+-}0.007 in all beam qualities. The dosimetry using the IP and the equation can estimate the exposure dose in a range from 9.0x10{sup -2} to 5.0 {mu}C kg{sup -1} within an uncertainty of {+-}5% required by the Japanese Industry Standard. This dose range partially included the doses under routine condition. The doses between 1.0 and 1.0x10{sup 2} {mu}C kg{sup -1} under the routine condition can be shifted to the 5% region by using an absorber. The IP dosimetry is applicable to the quality control of the CR systems.

Ariga, Eiji; Ito, Shigeki; Deji, Shizuhiko; Saze, Takuya; Nishizawa, Kunihide [Graduate School of Environmental Studies, Nagoya University and Nagoya Daini Red Cross Hospital, 466-8650, Nagoya (Japan); Radioisotope Research Center, Nagoya University, 464-8602, Nagoya (Japan); Radioisotope Research Center, Tokushima University, 770-8503, Tokushima (Japan); Radioisotope Research Center, Nagoya University, 464-8602, Nagoya (Japan)

2007-01-15

344

Advanced development of particle-beam-probe diagnostic systems. Technical progress report, 1 July 1980-30 April 1981  

SciTech Connect

The heavy ion beam probe system on the RENTOR tokamak has been reinstalled with considerably improved performance. The heavy neutral beam probe system on the ALEX baseball facility has demonstrated the capability of measuring space potential in minimum-B geometry. A large amount of data were obtained from the highly successful TMX beam probe system and are presently being analyzed. Technological improvements were made on both the RENTOR and ALEX diagnostic systems, new ion sources and extraction configurations were investigated, and the superiority of off-line processing techniques for beam probe data has been demonstrated. The development of high energy probing beams for application to major confinement experiments has been initiated and cross-over sweep systems to improve spatial resolution, differential pumping, and reduce energy requirements have been designed.

Hickok, R.L.; Jennings, W.C.; Woo, J.T.; Connor, K.A.

1981-05-01

345

Use of an Information Monitoring and Diagnostic System to Improve Building Operations  

Microsoft Academic Search

This paper discusses a demonstration of a technology to address the problem that buildings do not perform as well as anticipated during design. We partnered with an innovative building operator to evaluate a prototype Information Monitoring and Diagnostic System (IMDS). The IMDS consists of a set of high-quality sensors, data acquisition software and hardware, and data visualization software, including a

Mary Ann Piette; Sat Kartar Khalsa; Philip Haves

2000-01-01

346

The impact of hemolysis on Ortho-Clinical Diagnostic's ECi and Roche's elecsys immunoassay systems  

Microsoft Academic Search

Background: Hemolysis is regularly encountered in clinical specimens and often interferes with a variety of laboratory test methods. Although not widely recognized, immunoassays based on nonisotopic detection systems can also be affected by hemolysis. For this reason, we investigated the effect of differing amounts of hemolysis across a range of values for several immunoassays on the Ortho-Clinical Diagnostics ECi and

J. A. Snyder; M. W. Rogers; M. S. King; J. C. Phillips; J. F. Chapman; C. A. Hammett-Stabler

2004-01-01

347

Diagnostic system for on-line detection of rotor faults in induction motor drives  

Microsoft Academic Search

? Abstract -- The paper presents an on-line condition monitoring and diagnostic system for induction motor drives. It enables detection of many different faults, which may arise during the lifetime of the motor, although special attention was devoted to identify broken rotor bars at an early stage of the fault propagation. The method is based on the analysis of stator

R. Fiser; H. Lavric; V. Ambrozic; M. Bugeza

2011-01-01

348

A participatory diagnostic study of the oil palm (Elaeis guineensis) seed system in Benin (Online first)  

Microsoft Academic Search

A participatory diagnostic study of the oil palm (Elaeis guineensis Jacq.) seed system (OPSS) was conducted along a gradient of rainfall and distance to the oil palm research centre across the oil palm growing belt of Benin. The objective was to identify, jointly with key actors, the constraints in the OPSS and to assess the performance of the OPSS from

E. Akpo; P. V. Vissoh; R. C. Tossou; T. Crane; D. K. Kossou; P. Richards; T. J. Stomph; P. C. Struik

2012-01-01

349

Diagnostic system for identification of accident scenarios in nuclear power plants using artificial neural networks  

Microsoft Academic Search

This paper presents the work carried out towards developing a diagnostic system for the identification of accident scenarios in 220MWe Indian PHWRs. The objective of this study is to develop a methodology based on artificial neural networks (ANNs), which assists in identifying a transient quickly and suggests the operator to initiate the corrective actions during abnormal operations of the reactor.

T. V. Santosh; A. Srivastava; V. V. S. Sanyasi Rao; A. K. Ghosh; H. S. Kushwaha

2009-01-01

350

Filter-Fluorescer Diagnostic System (FFLEX) for the National Ignition Facility (NIF).  

National Technical Information Service (NTIS)

An early Filter-Fluorescer Diagnostic System (FFLEX) is being fielded at the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) to measure the amount of hard x-rays (20 < hv < 150 keV) generated in laser fusion experiments. ...

J. W. McDonald R. L. Kauffman J. R. Celeste M. A. Rhodes F. D. Lee L. J. Suter A. P. Lee J. M. Foster G. Slark

2004-01-01

351

Configurability in a Diagnostic Expert System for Paper Machine Dryer Sections  

Microsoft Academic Search

A "Paper Drying Expert System" (PDES) prototype is being developed as a diagnostic consultantfor troubleshooting dryer sections of paper machines. It is currently undergoing validation in two pulp andpaper mills, scheduled to be completed in September 1994. A requirement that the PDES be configurablefor many possible dryer configurations is a major consideration. This paper describes the project with afocus on

J. r. Amyot; J. d. Gowing; R. h. Wylie; R. Henzell

352

A portable hardware-in-the-loop (HIL) device for automotive diagnostic control systems.  

PubMed

In-vehicle driving tests for evaluating the performance and diagnostic functionalities of engine control systems are often time consuming, expensive, and not reproducible. Using a hardware-in-the-loop (HIL) simulation approach, new control strategies and diagnostic functions on a controller area network (CAN) line can be easily tested in real time, in order to reduce the effort and the cost of the testing phase. Nowadays, spark ignition engines are controlled by an electronic control unit (ECU) with a large number of embedded sensors and actuators. In order to meet the rising demand of lower emissions and fuel consumption, an increasing number of control functions are added into such a unit. This work aims at presenting a portable electronic environment system, suited for HIL simulations, in order to test the engine control software and the diagnostic functionality on a CAN line, respectively, through non-regression and diagnostic tests. The performances of the proposed electronic device, called a micro hardware-in-the-loop system, are presented through the testing of the engine management system software of a 1.6 l Fiat gasoline engine with variable valve actuation for the ECU development version. PMID:22075387

Palladino, A; Fiengo, G; Lanzo, D

2011-11-08

353

Testing Engine Generator Sets with the Programmable Diagnostic System Model 770 (PDS-770) - A Feasibility Study.  

National Technical Information Service (NTIS)

This report presents findings of a study to determine the feasibility of using the Model 770 Programmable Diagnostic System (PDS-770) to test 1.5, 10, and 45 KW Engine Generator Sets. The PDS-770 is capable of diagnosing malfunctions in spark and compress...

1970-01-01

354

CASE-BASED REASONING METHOD FOR REAL-TIME EXPERT DIAGNOSTICS SYSTEMS  

Microsoft Academic Search

The method of case-based reasoning for a solution of problems of real-time diagnostics and forecasting in intelligent decision support systems (IDSS) is considered. Special attention is drawn to case library structure for real-time IDSS (RT IDSS) and algorithm of k-nearest neighbors type. This work was supported by RFBR.

Alexander Eremeev; Pavel Varshavskiy

2008-01-01

355

Computerized diagnostic decision support system for the classification of preinvasive cervical squamous lesions  

Microsoft Academic Search

Previous studies have revealed considerable interobserver and intraobserver variation in the histological classification of preinvasive cervical squamous lesions. The aim of the present study was to develop a decision support system (DSS) for the histological interpretation of these lesions. Knowledge and uncertainty were represented in the form of a Bayesian belief network that permitted the storage of diagnostic knowledge and,

G. J. Price; W. G. Mccluggage; M. L. Morrison; G. Mcclean; L. Venkatraman; J. Diamond; H. Bharucha; R. Montironi; P. H. Bartels; D. Thompson; P. W. Hamilton

2003-01-01

356

Internationalizing Extension with Stakeholder Training Meetings: Use of a Distance Diagnostic Information System and Interactive Video  

Microsoft Academic Search

The International Plant Diagnostic Network (IPDN) was developed to assist in food safety and the protection of crops for citizens of the United States of America and international host countries. IPDN used the model of a system of diagnosing plant problems and information sharing. This model was developed among the Land Grant Universities in the United States as part of

Pete Vergot; Tim Momol

357

Study of Laser System Requirements for Application in Beam Diagnostics and Polarimetry at the ILC.  

National Technical Information Service (NTIS)

Advanced laser systems will be essential for a range of diagnostics devices and polarimetry at the ILC. High average power, high beam quality, excellent stability and reliability will be crucial in order to deliver the information required to attain the n...

A. Reichold B. Foster D. F. Howell G. Hirst G. Quelch I. Ross J. Urakawa K. Peach M. Qureshi N. Delerue S. Dixit

2007-01-01

358

An internationally recognized quality assurance system for diagnostic parasitology in animal health and food safety, with example data on trichinellosis.  

PubMed

A quality assurance (QA) system was developed for diagnostic parasitology and implemented for several diagnostic assays including fecal flotation and sedimentation assays, trichomonad culture assay, and the testing of pork and horse meat for Trichinella to facilitate consistently reliable results. The system consisted of a validated test method, procedures to confirm laboratory capability, and protocols for documentation, reporting, and monitoring. Specific system components included a quality assurance manual, training program, proficiency panels, inter-laboratory check-sample exchange program, assay critical control points, controls, and audits. The quality assurance system of the diagnostic laboratory was audited according to ISO/IEC Standard 17025 by an international third party accrediting body and accredited as a testing laboratory for the specific parasitology tests. Test results generated from the laboratory were reliable and scientifically defensible according to the defined parameters of the tests and were therefore valid for a variety of purposes, including food safety, international trade, and declaration of disease status in an animal, herd, farm, or region. The system was applicable to various test methods for the detection of parasites in feces or other samples, and a digestion test system developed for Trichinella was used as an example. A modified tissue digestion assay was developed, validated, and implemented by the Canadian Food Inspection Agency's Centre for Animal Parasitology for efficiency and quality assurance. The details of the method were properly documented for routine testing and consisted of a homogenization process, an incubation at 45+/-2 degrees C, and two sequential sedimentations in separatory funnels to concentrate and clarify final aliquots for microscopic examination. To facilitate consistently reliable test results, 14 critical control points were identified and monitored, analysts were certified, and the test system verified through the use of validation data, proficiency samples, and training modules. PMID:11751008

Gajadhar, Alvin A; Forbes, Lorry B

2002-01-01

359

Use of the focusing multi-slit ion optical system at RUssian Diagnostic Injector (RUDI).  

PubMed

The upgrade of the diagnostic neutral beam injector RUDI in 2010 was performed to increase the beam density at the focal plane in accordance with the requirements of charge-exchange recombination spectroscopy diagnostics. A new focusing ion-optical system (IOS) with slit beamlets and an enlarged aperture was optimized for 50% higher nominal beam current and reduced angular divergence with respect to the previous multi-aperture IOS version. The upgraded injector provides the beam current up to 3 A, the measured beam divergence in the direction along the slits is 0.35°. Additionally, the plasma generator was modified to extend the beam pulse to 8 s. PMID:22380312

Listopad, A; Coenen, J; Davydenko, V; Ivanov, A; Mishagin, V; Savkin, V; Schweer, B; Shulzhenko, G; Uhlemann, R

2012-02-01

360

Use of the focusing multi-slit ion optical system at RUssian Diagnostic Injector (RUDI)  

SciTech Connect

The upgrade of the diagnostic neutral beam injector RUDI in 2010 was performed to increase the beam density at the focal plane in accordance with the requirements of charge-exchange recombination spectroscopy diagnostics. A new focusing ion-optical system (IOS) with slit beamlets and an enlarged aperture was optimized for 50% higher nominal beam current and reduced angular divergence with respect to the previous multi-aperture IOS version. The upgraded injector provides the beam current up to 3 A, the measured beam divergence in the direction along the slits is 0.35 deg. Additionally, the plasma generator was modified to extend the beam pulse to 8 s.

Listopad, A.; Davydenko, V.; Ivanov, A.; Mishagin, V.; Savkin, V.; Shulzhenko, G. [Budker Institute of Nuclear Physics, 630090 Novosibirsk (Russian Federation); Coenen, J.; Schweer, B.; Uhlemann, R. [Trilateral Euregio Cluster, Institut fuer Energieforschung-Plasmaphysik, Forschungszentrum Juelich GmbH, Association EURATOM-KFA, 52425 Juelich (Germany)

2012-02-15

361

Coherent Synchrotron Radiation as a Diagnostic Tool for the LCLS Longitudinal Feedback System  

SciTech Connect

The Linac Coherent Light Source (LCLS) will be the world's first x-ray free-electron laser (FEL). To ensure the vitality of FEL lasing, a longitudinal feedback system is required together with other diagnostics. In this paper, we study the possibility of using Coherent Synchrotron Radiation (CSR) from the chicane as a diagnostic tool for bunch length feedback. Studies show that CSR is a good candidate, even for a non-Gaussian, double-horn longitudinal charge distribution as in the LCLS. We further check the possibility for detecting possible microbunching.

Wu, Juhao; Emma, P.; Huang, Z.; /SLAC

2005-06-15

362

In situ process diagnostics of silane plasma for device-quality a-Si:H deposition  

NASA Astrophysics Data System (ADS)

Coherent anti-Stokes Raman spectroscopy (CARS) and mass spectrometry (MS) have been applied to in situ process diagnostics of a silane plasma for device-quality a-Si:H film deposition. Silane depletion was directly measured by CARS and is linearly dependent on RF power in the region of 4-12 W with a slope of 0.5 percent/mW-sq cm. The depletion is also dependent on SiH4 flow rate starting with a 50 percent depletion at a low flow rate of 5.6 sccm and asymptotically approaching an 8 percent depletion at a flow rate of 80 sccm. The mass spectral line signal intensity of disilane increases with RF power and shows an apparent transition at 6 W. Disilane formation in silane plasma, film deposition rate, and silane depletion ratio as a function of the RF power indicate that the film growth mechanism in the low-power region of 3.5-6.5 W is substantially different from that in the high-power region of 6.5-12 W.

Shing, Y. H.; Perry, J. W.; Hermann, A. M.

363

Use of a charge-exchange process in spectral diagnostics of plasma streams  

SciTech Connect

Currently both in actual experiments for injection of plasma into space around the earth and in the corresponding model laboratory tests there is extensive use of optical diagnostics. However known optical methods based on recording the natural luminescence of a plasma are used in these experiments only for qualitative analysis and sometimes they may lead to erroneous conclusions. This is connected with the fact that in a nonsteady-state plasma excitation of ions is not in equilibrium and it is governed by processes of recombination or electron shock and it depends strongly on a parameter which is difficult to determine such as electron temperature. In the present work on the basis of the results recent studies a new method is suggested for measuring the distribution of plasma stream ion concentration by recording the luminescence of lines excited during charge-exchange. Use of the new method is described in experiments for modelling the interaction of a rapidly expanding plasma cloud with a magnetic field. For comparison data are provided which were obtained in recording the natural luminescence of a plasma excited during recombination.

Zakharov, Yu.P.; Orishich, O.M.; Syntnikov, V.N. [and others

1994-11-01

364

Wireless capsule endoscopy: from diagnostic devices to multipurpose robotic systems.  

PubMed

In the recent past, the introduction of miniaturised image sensors with low power consumption, based on complementary metal oxide semiconductor (CMOS) technology, has allowed the realisation of an ingestible wireless capsule for the visualisation of the small intestine mucosa. The device has received approval from Food and Drug Administration and has gained momentum since it has been more successful than traditional techniques in the diagnosis of small intestine disorders. In 2004 an esophagus specific capsule was launched, while a solution for colon is still under development. However, present solutions suffer from several limitations: they move passively by exploiting peristalsis, are not able to stop intentionally for a prolonged diagnosis, they receive power from an internal battery with short length, and their usage is restricted to one organ, either small bowel or esophagus. However the steady progresses in many branches of engineering, including microelectromechanical systems (MEMS), are envisaged to affect the performances of capsular endoscopy. The near future foreshadows capsules able to pass actively through the whole gastrointestinal tract, to retrieve views from all organs and to perform drug delivery and tissue sampling. In the long term, the advent of robotics could lead to autonomous medical platforms, equipped with the most advanced solutions in terms of MEMS for therapy and diagnosis of the digestive tract. In this review, we discuss the state of the art of wireless capsule endoscopy (WCE): after a description on the current status, we present the most promising solutions. PMID:17160703

Moglia, Andrea; Menciassi, Arianna; Schurr, Marc Oliver; Dario, Paolo

2007-04-01

365

The diagnostic system of the neutral beam injectors for ITER heating and current drive  

SciTech Connect

The neutral beam injectors for ITER are designed to deliver hydrogen or deuterium atoms accelerated at 1 MV for a total power of 34 MW. Design of the neutral beam and of the ion source test facilities is presently ongoing. Among the various activities, also the definition and assessment of necessary diagnostics are being carried out. Within this framework, requirements and constraints of the diagnostic system will be discussed in the present paper with the aim of providing data relevant for protection, operation, characterization, and improvement of the performances of the test facilities. The definition of the most suitable locations for the diagnostics and of their preliminary integration into the mechanical design will be proposed. Proposals for the extraction of signals from the high voltage components will also be presented.

Serianni, Gianluigi; Pomaro, Nicola; Pasqualotto, Roberto; Spolaore, Monica; Valisa, Marco [Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, C.so Stati Uniti, 4, 35127 Padova (Italy)

2008-10-15

366

Design and testing of an ultrasonic system with integrated diagnostic and therapy modes  

NASA Astrophysics Data System (ADS)

Our laboratories developed and tested a system integrating high-intensity focused ultrasound (HIFU) with diagnostic ultrasound procedures for aiming, delivering, and monitoring treatment exposures. The system employs 5-MHz, 5-element spherical-cap HIFU arrays with annular electrodes (for variable focusing) or strip electrodes (for inducing broad lesions of controlled width). Central apertures in these arrays house a coaxial diagnostic phased array (48 elements), interfaced with a custom digital system for visualization and RF echo acquisition. Several operational modes were investigated. A preexposure mode permits the HIFU focal point to be aimed at the desired location in B-mode images. It also assesses harmonic generation in the HIFU beam, using the diagnostic array to receive and spectrally analyze echoes from a short HIFU pulse aimed at targeted tissues. Radiation-force elastography uses the diagnostic array to monitor tissue displacements induced by brief exposures from the HIFU transducer; pre- and posttherapy data are compared to delineate mechanical alterations in lesioned volumes. Acquired pre- and post-RF data are also spectrally analyzed to map changes in scattering and attenuation indicative of lesion production. These modes have been successfully tested under in vitro conditions and are now entering use in animal studies aimed at treating cancer and cardiac diseases.

Lizzi, Frederic L.

2001-05-01

367

Statistical Process Control System for VLSI Fabrication.  

National Technical Information Service (NTIS)

The CMU-CAM system for statistical process control of VLSI (very large scale integration) manufacturing is described. It is a software system which can perform statistical quality control and feed-forward control rescheduling on line, and process diagnosi...

A. J. Strojwas

1989-01-01

368

Intermediate frequency band digitized high dynamic range radiometer system for plasma diagnostics and real-time Tokamak control.  

PubMed

An intermediate frequency (IF) band digitizing radiometer system in the 100-200 GHz frequency range has been developed for Tokamak diagnostics and control, and other fields of research which require a high flexibility in frequency resolution combined with a large bandwidth and the retrieval of the full wave information of the mm-wave signals under investigation. The system is based on directly digitizing the IF band after down conversion. The enabling technology consists of a fast multi-giga sample analog to digital converter that has recently become available. Field programmable gate arrays (FPGA) are implemented to accomplish versatile real-time data analysis. A prototype system has been developed and tested and its performance has been compared with conventional electron cyclotron emission (ECE) spectrometer systems. On the TEXTOR Tokamak a proof of principle shows that ECE, together with high power injected and scattered radiation, becomes amenable to measurement by this device. In particular, its capability to measure the phase of coherent signals in the spectrum offers important advantages in diagnostics and control. One case developed in detail employs the FPGA in real-time fast Fourier transform (FFT) and additional signal processing. The major benefit of such a FFT-based system is the real-time trade-off that can be made between frequency and time resolution. For ECE diagnostics this corresponds to a flexible spatial resolution in the plasma, with potential application in smart sensing of plasma instabilities such as the neoclassical tearing mode (NTM) and sawtooth instabilities. The flexible resolution would allow for the measurement of the full mode content of plasma instabilities contained within the system bandwidth. PMID:21721692

Bongers, W A; van Beveren, V; Thoen, D J; Nuij, P J W M; de Baar, M R; Donné, A J H; Westerhof, E; Goede, A P H; Krijger, B; van den Berg, M A; Kantor, M; Graswinckel, M F; Hennen, B A; Schüller, F C

2011-06-01

369

Evaluating the quality of a probabilistic diagnostic system using different inferencing strategies.  

PubMed Central

In this paper we describe the evaluation of a probabilistic diagnostic system for patients with renal mass. Three inference models: Multi-membership Bayesian (MB), Minimal Diagnosis (MD) and Bayesian Network (BN), and 72 patients are used to illustrate three interrelated measures of system performance: accuracy, reliability and discriminating power. The inferencing strategies we tested demonstrated the kind of trade-offs in the performance measures that can be expected from imperfect systems. Ultimately, the purpose and expected use of a system should dictate the relative importance ascribed to different aspects of system performance.

Li, Y. C.; Haug, P. J.

1993-01-01

370

IDAPS (Image Data Automated Processing System) System Description.  

National Technical Information Service (NTIS)

This document describes the physical configuration and components used in the image processing system referred to as IDAPS (Image Data Automated Processing System). This system was developed by the Environmental Research Institute of Michigan (ERIM) for E...

P. Kortesoja

1988-01-01

371

A Study of Laser System Requirements for Application in Beam Diagnostics And Polarimetry at the ILC  

SciTech Connect

Advanced laser systems will be essential for a range of diagnostics devices and polarimetry at the ILC. High average power, high beam quality, excellent stability and reliability will be crucial in order to deliver the information required to attain the necessary ILC luminosity as well as for efficient polarimetry. The key parameters are listed together with the R & D required to achieve the necessary laser system performance.

Dixit, S.; Delerue, N.; Foster, B.; Howell, D.F.; Peach, K.; Quelch, G.; Qureshi, M.; Reichold, A.; /Oxford U.; Hirst, G.; Ross, I.; /Rutherford; Urakawa, J.; /KEK, Tsukuba; Soskov, V.; Variola, A.; Zomer, F.; /Orsay, LAL; Blair, G.A.; Boogert, S.T.; Boorman, G.; Bosco, A.; Driouichi, C.; Karataev, P.; /Royal Holloway, U. of London; Brachmann, A.; /SLAC

2007-02-12

372

Practical physical and chemical diagnostics of sealed paper-oil bushings in monitoring system  

Microsoft Academic Search

An algorithm of the full-scale physical and chemical diagnostics of the state of sealed paper-oil bushing is suggested in\\u000a an elementary monitoring system based on a pressure sensor, combined moisture-temperature sensor, and temperature sensor.\\u000a The three simple, tiny sensors enable one to carry out a valuable check of the paper-oil bushing in the monitoring system\\u000a and to offer a solution

V. G. Arakelyan

2009-01-01

373

Real-time diagnostics in the EGR system of diesel engines  

Microsoft Academic Search

The paper presents a real-time approach for parameter identification used for diagnosing different types of faults in the exhaust gas recirculation (EGR) system of diesel engines. An important benefit of the proposed diagnostics method is its ability to detect and estimate a leak or a restriction in the EGR system. This is achieved by making use of a recursive-least-squares (RLS)

Javad Mohammadpour; Karolos M. Grigoriadis; Matthew A. Franchek; Benjamin J. Zwissler

2008-01-01

374

Diagnostic expert systems: Encoding geological knowledge for an exploration play analysis  

Microsoft Academic Search

The U.S. Geological Survey is currently exploring the feasibility of applying diagnostic expert systems and knowledge-based acquisition techniques to the geologic analysis of sedimentary basins and petroleum exploration plays. This paper describes a unique approach to the design and application of a rule-based expert system to the analysis of exploration plays, a methodology commonly used to assess petroleum resources in

1993-01-01

375

Diagnostic system of the Lawrence Livermore National Laboratory two-stage light-gas gun  

Microsoft Academic Search

A two-stage light-gas gun is used for a variety of dynamic physical-property measurements at 100 GPa (1 Mbar) pressures. The diagnostic system described here consists of a flash x-ray system to measure impactor velocity, detectors and electronics to measure shock-wave velocities with subnanosecond resolution, and data--analysis techniques that permit us to measure the tilt and distortion of the impactor and

A. C. Mitchell; W. J. Nellis

1981-01-01

376

Diagnostic system of the Lawrence Livermore National Laboratory two-stage light-gas gun  

Microsoft Academic Search

A two-stage light-gas gun is used for a variety of dynamic physical-property measurements at 100 GPa (1 Mbar) pressures. The diagnostic system described here consists of a flash x-ray system to measure impactor velocity, detectors and electronics to measure shock-wave velocities with subnanosecond resolution, and data–analysis techniques that permit us to measure the tilt and distortion of the impactor and

A. C. Mitchell; W. J. Nellis

1981-01-01

377

Dynamic MRI-based computer aided diagnostic systems for early detection of kidney transplant rejection: A survey  

NASA Astrophysics Data System (ADS)

Early detection of renal transplant rejection is important to implement appropriate medical and immune therapy in patients with transplanted kidneys. In literature, a large number of computer-aided diagnostic (CAD) systems using different image modalities, such as ultrasound (US), magnetic resonance imaging (MRI), computed tomography (CT), and radionuclide imaging, have been proposed for early detection of kidney diseases. A typical CAD system for kidney diagnosis consists of a set of processing steps including: motion correction, segmentation of the kidney and/or its internal structures (e.g., cortex, medulla), construction of agent kinetic curves, functional parameter estimation, diagnosis, and assessment of the kidney status. In this paper, we survey the current state-of-the-art CAD systems that have been developed for kidney disease diagnosis using dynamic MRI. In addition, the paper addresses several challenges that researchers face in developing efficient, fast and reliable CAD systems for the early detection of kidney diseases.

Mostapha, Mahmoud; Khalifa, Fahmi; Alansary, Amir; Soliman, Ahmed; Gimel'farb, Georgy; El-Baz, Ayman

2013-10-01

378

An internationally recognized quality assurance system for diagnostic parasitology in animal health and food safety, with example data on trichinellosis  

Microsoft Academic Search

A quality assurance (QA) system was developed for diagnostic parasitology and implemented for several diagnostic assays including fecal flotation and sedimentation assays, trichomonad culture assay, and the testing of pork and horse meat for Trichinella to facilitate consistently reliable results. The system consisted of a validated test method, procedures to confirm laboratory capability, and protocols for documentation, reporting, and monitoring.

Alvin A. Gajadhar; Lorry B. Forbes

2002-01-01

379

Reasoning about systems with many processes  

Microsoft Academic Search

Methods are given for automatically verifying temporal properties of concurrent systems containing an arbitrary number of finite-state processes that communicate using CCS actions. TWo models of systems are considered. Systems in the first model consist of a unique control process and an arbitrary number of user processes with identical definitions. For this model, a decision procedure to check whether all

Steven M. German; A. Prasad Sistla

1992-01-01

380

Urdu translation of the ICD-10 chapter V (F), research diagnostic criteria (RDC): process and principles of translation.  

PubMed

Although there is some literature on translation and cultural adaptation of measurement scales, none is available on the translation of diagnostic guidelines, such as the International Classification of Diseases Tenth Edition (ICD-10). Our group translated ICD-10, Research Diagnostics Criteria (RDC) into Urdu, which is the official language of Pakistan but is also spoken in some states in India. Significant diasporas of Urdu speakers also exist in Western Countries. We describe the translation process and the principles that guided our work. The translation process consisted of preparation, forward-translation, external translation, synthesis, focus group discussions with laypersons to clarify terminology, and review by mental health professionals and laypersons. Translation also included a wider consultation process in which the final version was sent to Pakistani mental health professionals in Pakistan and abroad. PMID:21911512

Naeem, Farooq; Kingdon, David; Saeed, Athar Ahmed; Zaidi, Qaiser; Ayub, Muhammad

2011-09-01

381

Laser system for high resolution Thomson scattering diagnostics on the COMPASS tokamak  

SciTech Connect

A new Thomson scattering diagnostic has been designed and is currently being installed on the COMPASS tokamak in IPP Prague in the Czech Republic. The requirements for this system are very stringent with approximately 3 mm spatial resolution at the plasma edge. A critical part of this diagnostic is the laser source. To achieve the specified parameters, a multilaser solution is utilized. Two 30 Hz 1.5 J Nd:YAG laser systems, used at the fundamental wavelength of 1064 nm, are located outside the tokamak area at a distance of 20 m from the tokamak. The design of the laser beam transport path is presented. The approach leading to a final choice of optimal focusing optics is given. As well as the beam path to the tokamak, a test path of the same optical length was built. Performance tests of the laser system carried out using the test path are described.

Bohm, P. [Institute of Plasma Physics AS CR, v.v.i., EURATOM IPP.CR, Za Slovankou 1782/3, 18200 Prague 8 (Czech Republic); Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Brehova 7, 11519 Prague 1 (Czech Republic); Sestak, D.; Bilkova, P.; Aftanas, M.; Weinzettl, V.; Hron, M.; Panek, R. [Institute of Plasma Physics AS CR, v.v.i., EURATOM IPP.CR, Za Slovankou 1782/3, 18200 Prague 8 (Czech Republic); Baillon, L. [Ecole Nationale Superieure d'Arts et Metiers, 51000 Chalons en Champagne (France); Dunstan, M. R.; Naylor, G. [EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom); Walsh, M. J. [ITER Organization, CS 90046, 13067 St. Paul lez Durance Cedex (France)

2010-10-15

382

Straining and wrinkling processes during turbulence-premixed flame interaction measured using temporally-resolved diagnostics  

SciTech Connect

The dynamical processes of flame surface straining and wrinkling that occur as turbulence interacts with a premixed flame were measured using cinema-stereoscopic PIV (CS-PIV) and orthogonal-plane cinema-stereoscopic PIV (OPCS-PIV). These diagnostics provided temporally resolved measurements of turbulence-flame interaction at frame rates of up to 3 kHz and spatial resolutions as small as 280{mu} m. Previous descriptions of flame straining and wrinkling have typically been derived based on a canonical interaction between a pair of counter-rotating vortices and a planar flame surface. However, it was found that this configuration did not properly represent real turbulence-flame interaction. Interactions resembling the canonical configuration were observed in less than 10% of the recorded frames. Instead, straining and wrinkling were generally caused more geometrically complex turbulence, consisting of large groups of structures that could be multiply curved and intertwined. The effect of the interaction was highly dependent on the interaction geometry. Furthermore, even when the turbulence did exist in the canonical geometry, the straining and wrinkling of the flame surface were not well characterized by the vortical structures. A new mechanistic description of the turbulence-flame interaction was therefore identified and confirmed by the measurements. In this description, flame surface straining is caused by coherent structures of fluid-dynamic strain-rate (strain-rate structures). The role of vortical structures is to curve existing flame surface, creating wrinkles. By simultaneously considering both forms of turbulent structure, turbulence-flame interactions in both the canonical configuration and more complex geometries could be understood. (author)

Steinberg, Adam M.; Driscoll, James F. [Department of Aerospace Engineering, The University of Michigan, Ann Arbor, MI 48109 (United States)

2009-12-15

383

Performance analysis of parallel processing systems  

Microsoft Academic Search

A centralized parallel processing system with job splitting is considered. In such a system, jobs wait in a central queue, which is accessible by all the processors, and are split into independent tasks that can be executed on separate processors. This parallel processing system is modeled as a bulk arrival MX\\/M\\/c queueing system where customers and bulks correspond to tasks

R. Nelson; D. Towsley; A. N. Tantawi

1987-01-01

384

Digital image processing system for Landsat 3  

Microsoft Academic Search

A digital image processing system to support the Landsat 3 mission is discussed. NASA will provide the data reception and preprocessing facilities, while the DOE provides the production image processing system that generates film products and computer compatible tapes for users. The system was installed at the Earth Resources Observation System Data Center (EDC), and it is capable of operating

G. Harris Jr.

1979-01-01

385

Clinical cognition and diagnostic error: applications of a dual process model of reasoning  

Microsoft Academic Search

Both systemic and individual factors contribute to missed or delayed diagnoses. Among the multiple factors that impact clinical\\u000a performance of the individual, the caliber of cognition is perhaps the most relevant and deserves our attention and understanding.\\u000a In the last few decades, cognitive psychologists have gained substantial insights into the processes that underlie cognition,\\u000a and a new, universal model of

Pat Croskerry

2009-01-01

386

The video fluorescent device for diagnostics of cancer of human reproductive system  

NASA Astrophysics Data System (ADS)

Photodynamic therapy (PDT) is one of the advanced methods of treatment of skin cancer and surfaces of internal organs. The basic advantages of PDT are high efficiency and low cost of treatment. PDT technique is needed for providing fluorescent diagnostics. Laser-based systems are widely applied to the fluorescence excitations for diagnostic because of a narrow spectrum of fluorescence excitation and high density of radiation. Application of laser systems for carrying out fluorescent diagnostics gives the image of a tumor distorted by speckles that does not give an opportunity to obtain full information about the form of a tumor quickly. Besides, these laser excitation systems have complicated structure and high cost. As a base for the development and creation of a video fluorescent device one of commercially produced colposcopes was chosen. It allows to decrease cost of the device, and also has enabled to make modernization for already used colposcopes. A LED-based light source was offered to be used for fluorescence excitation in this work. The maximum in a spectrum of radiation of LEDs corresponds to the general spectral maximum of protoporphyrin IX (PPIX) absorption. Irradiance in the center of a light spot is 31 mW/cm2. The receiving optical system of the fluorescent channel is adjusted at 635 nm where a general spectral maximum of fluorescence PPIX is located. Also the device contains a RGB video channel, a white light source and a USB spectrometer LESA-01-BIOSPEC, for measurement of spectra of fluorescence and diffusion reflections in treatment area. The software is developed for maintenance of the device. Some studies on laboratory animals were made. As a result, areas with the increased concentration of a PPIX were correctly detected. At present, the device is used for diagnostics of cancer of female reproductive system in Research Centre for Obstetrics, Gynecology and Perinatology of the Russian Academy of Medical Sciences (Moscow, Russia).

Brysin, Nickolay N.; Linkov, Kirill G.; Stratonnikov, Alexander A.; Savelieva, Tatiana A.; Loschenov, Victor B.

2008-06-01

387

Ontology-oriented diagnostic system for traditional Chinese medicine based on relation refinement.  

PubMed

Although Chinese medicine treatments have become popular recently, the complicated Chinese medical knowledge has made it difficult to be applied in computer-aided diagnostics. The ability to model and use the knowledge becomes an important issue. In this paper, we define the diagnosis in Traditional Chinese Medicine (TCM) as discovering the fuzzy relations between symptoms and syndromes. An Ontology-oriented Diagnosis System (ODS) is created to address the knowledge-based diagnosis based on a well-defined ontology of syndromes. The ontology transforms the implicit relationships among syndromes into a machine-interpretable model. The clinical data used for feature selection is collected from a national TCM research institute in China, which serves as a training source for syndrome differentiation. The ODS analyzes the clinical cases to obtain a statistical mapping relation between each syndrome and associated symptom set, before rechecking the completeness of related symptoms via ontology refinement. Our diagnostic system provides an online web interface to interact with users, so that users can perform self-diagnosis. We tested 12 common clinical cases on the diagnosis system, and it turned out that, given the agree metric, the system achieved better diagnostic accuracy compared to nonontology method-92% of the results fit perfectly with the experts' expectations. PMID:23533534

Gu, Peiqin; Chen, Huajun; Yu, Tong

2013-02-19

388

Ontology-Oriented Diagnostic System for Traditional Chinese Medicine Based on Relation Refinement  

PubMed Central

Although Chinese medicine treatments have become popular recently, the complicated Chinese medical knowledge has made it difficult to be applied in computer-aided diagnostics. The ability to model and use the knowledge becomes an important issue. In this paper, we define the diagnosis in Traditional Chinese Medicine (TCM) as discovering the fuzzy relations between symptoms and syndromes. An Ontology-oriented Diagnosis System (ODS) is created to address the knowledge-based diagnosis based on a well-defined ontology of syndromes. The ontology transforms the implicit relationships among syndromes into a machine-interpretable model. The clinical data used for feature selection is collected from a national TCM research institute in China, which serves as a training source for syndrome differentiation. The ODS analyzes the clinical cases to obtain a statistical mapping relation between each syndrome and associated symptom set, before rechecking the completeness of related symptoms via ontology refinement. Our diagnostic system provides an online web interface to interact with users, so that users can perform self-diagnosis. We tested 12 common clinical cases on the diagnosis system, and it turned out that, given the agree metric, the system achieved better diagnostic accuracy compared to nonontology method—92% of the results fit perfectly with the experts' expectations.

Gu, Peiqin; Chen, Huajun

2013-01-01

389

A System for Simulating Fluctuation Diagnostics for Application to Turbulence Computations  

SciTech Connect

Present-day nonlinear microstability codes are able to compute the saturated fluctuations of a turbulent fluid versus space and time, whether the fluid be liquid, gas, or plasma. They are therefore able to determine turbulence-induced fluid (or particle) and energy fluxes. These codes, however, must be tested against experimental data, not only with respect to transport, but also characteristics of the fluctuations. The latter is challenging because of limitations in the diagnostics (e.g., finite spatial resolution) and the fact that the diagnostics typically do not measure exactly the quantities the codes compute. In this work, we present a system based on IDL{reg_sign} analysis and visualization software in which user-supplied ''diagnostic filters'' are applied to the code outputs to generate simulated diagnostic signals. The same analysis techniques as applied to the measurements, e.g., digital time-series analysis, may then be applied to the synthesized signals. Their statistical properties, such as rms fluctuation level, mean wave numbers, phase and group velocities, correlation lengths and times, and in some cases full S(k,{omega}) spectra can then be compared directly to those of the measurements.

Bravenec, R V; Nevins, W M

2006-02-21

390

Diagnostic expert systems: Encoding geological knowledge for an exploration play analysis  

SciTech Connect

The U.S. Geological Survey is currently exploring the feasibility of applying diagnostic expert systems and knowledge-based acquisition techniques to the geologic analysis of sedimentary basins and petroleum exploration plays. This paper describes a unique approach to the design and application of a rule-based expert system to the analysis of exploration plays, a methodology commonly used to assess petroleum resources in a basin. This technique consists of using various geologic models and Monte Carlo simulation or probabilistic methods for analyzing geologic and reservoir conditions favorable to the occurrence of petroleum resources. Work is in progress to adapt the geologic model used in the play analysis to an expert-systems and knowledge base, the object being to capture the logic and reasoning used to characterize the geologic model and to evaluate the play. Expert systems techniques now being developed are capable of dealing with inexact reasoning or reasoning under uncertainty by incorporating degrees of uncertainty to deal effectively with incomplete, inferred, or interpretive data involved in the knowledge base. The goal of this study is to provide an embedded diagnostic expert-system approach for characterizing the geologic model to expand upon the play-analysis system. Such a system provides the geologist with capabilities to document major basin components, such as stratigraphy, structural geology, and sedimentation, and to analyze the traditional concepts of source, reservoir, and trapping mechanisms. This expert system will assist the geologist in compiling and interpreting the geologic and reservoir engineering data necessary for running the probabilistic methods to calculate the amount of probable petroleum resources within each play. Diagnostic expert-systems technology can provide challenging new tools in knowledge acquisition and data interpretation in petroleum geology.

Miller, B.M. (Geological Survey, Denver, CO (United States))

1993-08-01

391

A diagnostic system for electrical faults in a high current discharge plasma setup  

SciTech Connect

A diagnostic system to detect electrical faults inside a coaxial high current discharge device is presented here. This technique utilizes two biconical antennas picking up electromagnetic radiation from the discharge device, a voltage divider sensing input voltage, and a Rogowski coil measuring the main discharge current. A computer program then analyses frequency components in these signals and provides information as to whether the discharge event was normal or any breakdown fault occurred inside the coaxial device. The diagnostic system is developed for a 450 kV and 50 kA capillary discharge plasma setup. For the setup various possible faults are analyzed by electrical simulation, followed by experimental results. In the case of normal discharge through the capillary load the dominant frequency is {approx}4 MHz. Under faulty conditions, the peak in magnitude versus frequency plot of the antenna signal changes according to the fault position which involves different paths causing variation in the equivalent circuit elements.

Nigam, S.; Aneesh, K.; Navathe, C. P.; Gupta, P. D. [Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)

2011-02-15

392

Optical control, diagnostic and power supply system for a solid state induction modulator  

SciTech Connect

A new high speed optical control, diagnostic and power supply system has been developed for a solid state induction modulator. The modulator consists of a large array of field effect transistors (FETs) that switch a high-voltage pulse across a tape-wound magnetic core. The FETs within the modulator are mounted on numerous circuit boards that are stacked in series for high-voltage operation. The new optical system overcomes the issue of voltage isolation by supplying each circuit board with optically coupled control power and high bandwidth signal information. An optical fiber is used to transmit laser light to a custom photovoltaic cell that provides dc power to the on-board control circuits. Optical fiber technology is again used to convey a pulse that contains detailed analog features to the FET gate controls. Diagnostic data and status information are also obtained from each board by similar optical methods. 8 refs., 6 figs., 1 tab.

Saethre, R. [Bechtel Nevada Corp., Las Vegas, NV (United States); Kirbie, H.; Hickman, B.; Lee, B.; Ollis, C. [Lawrence Livermore National Lab., CA (United States)

1997-06-01

393

Operation Request Gatekeeper: A software system for remote access control of diagnostic instruments in fusion experiments  

SciTech Connect

Tokamak diagnostic settings are repeatedly modified to meet the changing needs of each experiment. Enabling the remote diagnostic control has significant challenges due to security and efficiency requirements. The Operation Request Gatekeeper (ORG) is a software system that addresses the challenges of remotely but securely submitting modification requests. The ORG provides a framework for screening all the requests before they enter the secure machine zone and are executed by performing user authentication and authorization, grammar validation, and validity checks. A prototype ORG was developed for the ITER CODAC that satisfies their initial requirements for remote request submission and has been tested with remote control of the KSTAR Plasma Control System. This paper describes the software design principles and implementation of ORG as well as worldwide test results.

Abla, G.; Schissel, D. P. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); Fredian, T. W.; Stillerman, J. A.; Greenwald, M. J. [PSFC, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 (United States); Stepanov, D. N. [ITER Organization, Route de Vinon, CS 90 046, 13067 St. Paul-lez-Durance Cedex (France); Ciarlette, D. J. [Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee, 37831 (United States)

2010-10-15

394

MTX diagnostic and timing system for free-electron laser heating experiments  

SciTech Connect

In the microwave tokamak experiment (MTX) program, we are concentrating on experiments using intense, free-electron laser (FEL) generated microwave pulses. In initial FEL experiments, several diagnostic instruments were operated during injection of microwave pulses with peak powers to 0.2 GW at durations of 10 ns. Fixed and spatially scanning microwave detectors and receivers and a 48-element calorimeter on the inside wall of MTX diagnosed the GW-level FEL microwave pulses. With these diagnostics, linear-wave absorption and efficiencies of transmission through the quasi-optical transport system were studied. In addition, several radially resolved measurements of plasma density, temperature, and emission were made during FEL injection and were used in the analysis of microwave absorption data. A timing system, slaved to the FEL pulse arrival time, is capable of accuracy to a few nanoseconds in order to allow measurement of heating effects on the time scale of a single FEL pulse.

Casper, T.; Allen, S.; Foote, J.; Fenstermacher, M.; Hooper, E.; Hoshino, K.; Lasnier, C.; Makowski, M.; Meyer, W.; Moller, J.; Nilson, D.; Oasa, K.; Ogawa, T.; Rice, B.; Sewall, N.; Stallard, B.; Stever, R.; Thomassen, K.; Wood, R. (Lawrence Livermore National Laboratory, University of California, Livermore, CA (USA))

1990-10-01

395

Note: An advanced in situ diagnostic system for characterization of electric propulsion thrusters and ion beam sources  

NASA Astrophysics Data System (ADS)

We present an advanced diagnostic system for in situ characterization of electric propulsion thrusters and ion beam sources. The system uses a high-precision five-axis positioning system with a modular setup and the following diagnostic tools: a telemicroscopy head for optical imaging, a triangular laser head for surface profile scanning, a pyrometer for temperature scanning, a Faraday probe for current density mapping, and an energy-selective mass spectrometer for beam characterization (energy and mass distribution, composition). The capabilities of our diagnostic system are demonstrated with a Hall effect thruster SPT-100D EM1.

Bundesmann, C.; Tartz, M.; Scholze, F.; Leiter, H. J.; Scortecci, F.; Gnizdor, R. Y.; Neumann, H.

2010-04-01

396

Misdiagnosis: analysis based on case record review with proposals aimed to improve diagnostic processes.  

PubMed

Diagnostic error underlies about 10% of adverse events occurring in hospital practice. However, there have been very few studies considering means of improving the mechanisms of diagnosis. As a result, misdiagnosis has been described as 'the next frontier for patient safety'. In this study of case records of patients admitted to hospital as emergencies, some key factors that may underlie diagnostic errors were assessed. From these observations, possibilities for improving the quality of diagnosis and the planning of subsequent care are explored. This paper shows that cognitive biases, believed to distort diagnostic conclusions, can be applied quite specifically to stages in clinical care. These observations led to the proposal of a clinical assessment with a method designed to encourage analytical reasoning. In addition, minor defects in standard practice are shown to adversely influence diagnosis. The findings of this study offer possible means of improving the quality of diagnosis and subsequent patient care, and perhaps pave the way for prospective studies. PMID:21853823

Neale, Graham; Hogan, Helen; Sevdalis, Nick

2011-08-01

397

Distributed CAN-bus Based Beam Diagnostic System for Pulse RaceTrack Microtron  

Microsoft Academic Search

Very compact 70 MeV pulse race-track microtron is under construction now. To acquire outputs of beam-current transformers on every orbit and pulses of high voltage and RF field a distributed multi-channel beam diagnostic system was developed. Each acquisition controller consists of four fast differential amplifiers and one DSP-based micro-controller with on-chip ADC and CAN-bus controller. Each amplifier is coupled with

Alexander Chepurnov; O. Novojilov; S. Dudnikov; A. Chepurnov; I. Gribov; V. Shvedunov

2001-01-01

398

Characteristics of gyrotron scattering system for alpha particle diagnostics in TFTR (abstract)  

Microsoft Academic Search

In D-T plasmas, the understanding of the physics of confined ? particles is extremely valuable for the future fusion plasma device. Among the various proposed ? diagnostics, an X-mode collective Thomson scattering system employing a high-power gyrotron source (P&bartil;200 kW, f=60 GHz, pulse length &bartil;0.5 s, and modulation frequency=10–25 kHz) is being designed for TFTR. The detailed description of the

H. K. Park; N. Bretz; R. Ellis; P. C. Efthimion; R. Marsala; M. McCarthy; G. Renda; K. M. Young; D. R. Cohn; J. S. Machuzak; D. Y. Rhee; P. Woskov

1992-01-01

399

The diagnostics system for the multiple heavy ion beams induction linac experiment, MBE-4  

SciTech Connect

MBE-4 is a four beam current amplifying induction linac experiment conducted at LBL as a part of the Heavy Ion Fusion Accelerator Research (HIFAR) program for studying accelerator physics issues of a heavy ion driver for inertial fusion. The four ion beams (Cs{sup +}, 10 mA) are focused by electrostatic quadrupoles and accelerated fro about 200 keV to 900 keV through 24 induction gaps. Current amplification of up to nine times is achieved while the beam pulse duration is compressed from about 3 {mu}s to 0.5 {mu}s. The diagnostic system enables the complete time-resolved 2-D transverse phase space distribution of the beam to be measured. Reduction of the raw data yields the beam current, current profile, emittance, centroid position and angle as well as the beam envelope parameters. In addition, the longitudinal energy distribution is obtained from measurements using a calibrated electrostatic spectrometer. The diagnostic system hardware, as well as the data acquisition and reduction routines, are controlled by an IBM pc-XT. We shall describe the diagnostic system and discuss its performance in view of the specific issues which result from the acceleration and amplification of multiple beams of heavy ions.

Eylon, S.

1991-09-01

400

Automated fruit grading system using image processing  

Microsoft Academic Search

This paper describes the operations and performance of an automated quality verification system for agricultural products and its main features. The system utilizes improved engineering designs and image-processing techniques to convey and grade products. Basically two inspection stages of the system can be identified: external fruit inspection and internal fruit inspection. Surface inspection is accomplished through processing of color CCD

John B. Njoroge; Kazunori Ninomiya; Naoshi Kondo; H. Toita

2002-01-01

401

Report on the experience with the Supervisory Control and Diagnostics System (SCDS) of MFTF-B  

SciTech Connect

The Supervisory Control and Diagnostics System (SCDS) of MFTF is a multiprocessor computer system using graphics oriented displays with touch sensitive panels as the primary operator interface. Late in the calendar year 1981 the system was used to control an integrated test of the vacuum vessel, vacuum system, cryogenics system and the superconducting magnet of MFTF. Since the completion of those tests and starting in early calendar 1983 the system has been used for control of the neutral beam test facility at LLNL. This paper presents a short overview of SCDS for the purpose of orientation and then proceeds to describe the difficulties encountered in these preliminary encounters with reality. The band-aids used to hold things together as disaster threatened as well as the long-term solutions to the problems will be discussed. Finally, we will present some comments on system costs and management philosophy.

Wyman, R.H.

1983-11-18

402

Semiautomated IMINT processing baseline system  

Microsoft Academic Search

The objective of the SAIP ACTD is to make imagery a responsive contributing source to a commander's overall battlespace awareness by focusing on theater and tactical sensor exploitation. The goal of the exploitation system is to increase the image analyst efficiency in exploiting large volumes of image data produced by current and future theater and tactical imaging platforms. The system

John F. Gilmore; Larry E. Williams

1997-01-01

403

40 CFR 86.099-17 - Emission control diagnostic system for 1999 and later light-duty vehicles and light-duty trucks.  

Code of Federal Regulations, 2013 CFR

...this section. (4) Access to the data required...shall not require any access codes or devices that... (g) The emission control diagnostic system is...materials. The emission control diagnostic system shall provide for standardized access and conform...

2013-07-01

404

Process Monitoring, Modeling, and Control of Plasma Etch Systems  

NASA Astrophysics Data System (ADS)

Selective etching of silicon dioxide over silicon is a frequently used process in the manufacture of semiconductor devices. Although central to the microelectronics manufacturing process, control strategies for plasma etch systems have been limited to statistical based process control and recipe control techniques, mainly due to a lack of in-situ real -time measurements of process performance. This dissertation focuses on the design, characterization, and implementation of two diagnostics on a research plasma reactor, and their use for process monitoring, empirical model building and advanced process control. The diagnostics added to the reactor during this research included laser interferometry and voltage and current probes. An algorithm was developed to compute etch rate and end-point condition from the laser interferometer signal in near real-time. The RF monitoring sensor measured information about the RF voltage, current, and phase angle at three locations in the power delivery system--before and after the matching network and at the lower electrode. Transmission line analysis showed the importance of accurate characterization of stray capacitance and inductance in the power delivery system. Plasma parameters of impedance, delivered power, and sheath thickness were computed using simple equivalent circuit models for the plasma discharge. Measurement of fundamental and harmonic components of the RF voltage, current, and phase showed that the power generated in the plasma at harmonic frequencies was approximately 3% of the generator power. These diagnostics provided the foundation for steady-state and dynamic model development of the plasma etch process. Several linear and nonlinear steady-state techniques including regression, neural networks, and projection of latent structures (PLS) were used in empirical model building. Dynamic models were also developed using neural network techniques. It was found that both the regression and recurrent neural network model structures provided a satisfactory fit of the data for the operating space investigated, although neural network models provided a dynamic model in a nonlinear state-space formulation. PLS techniques were used for model reduction and variable selection. The most relevant variables for model construction were power, pressure, and chamber impedance. The impedance measurement significantly improved the predictive capability of the model.

Bushman, Scott Gregory

405

Diagnostic Systems Plan for the Advanced Light Source Top-OffUpgrade  

SciTech Connect

The Advanced Light Source (ALS) will soon be upgraded to enable top-off operations [1], in which electrons are quasi-continuously injected to produce constant stored beam current. The upgrade is structured in two phases. First, we will upgrade our injector from 1.5 GeV to 1.9 GeV to allow full energy injection and will start top-off operations. In the second phase, we will upgrade the Booster Ring (BR) with a bunch cleaning system to allow high bunch purity top-off injection. A diagnostics upgrade will be crucial for success in both phases of the top-off project, and our plan for it is described in this paper. New booster ring diagnostics will include updated beam position monitor (BPM) electronics, a tune monitoring system, and a new scraper. Two new synchrotron light monitors and a beam stop will be added to the booster-to-storage ring transfer line (BTS), and all the existing beam current monitors along the accelerator chain will be integrated into a single injection efficiency monitoring application. A dedicated bunch purity monitor will be installed in the storage ring (SR). Together, these diagnostic upgrades will enable smooth commissioning of the full energy injector and a quick transition to high quality top-off operation at the ALS.

Barry, Walter; Chin, Mike; Robin, David; Sannibale, Fernando; Scarvie, Tom; Steier, Christoph

2005-05-10

406

Design of a new optical system for Alcator C-Mod motional Stark effect diagnostic  

SciTech Connect

The motional Stark effect (MSE) diagnostic on Alcator C-Mod uses an in-vessel optical system (five lenses and three mirrors) to relay polarized light to an external polarimeter because port access limitations on Alcator C-Mod preclude a direct view of the diagnostic beam. The system experiences unacceptable, spurious drifts of order several degrees in measured pitch angle over the course of a run day. Recent experiments illuminated the MSE diagnostic with polarized light of fixed orientation as heat was applied to various optical elements. A large change in measured angle was observed as two particular lenses were heated, indicating that thermal-stress-induced birefringence is a likely cause of the spurious variability. Several new optical designs have been evaluated to eliminate the affected in-vessel lenses and to replace the focusing they provide with curved mirrors; however, ray tracing calculations imply that this method is not feasible. A new approach is under consideration that utilizes in situ calibrations with in-vessel reference polarized light sources.

Ko, Jinseok [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Scott, Steve; Bitter, Manfred [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Lerner, Scott [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2008-10-15

407

Model selection for a medical diagnostic decision support system: a breast cancer detection case.  

PubMed

There are a number of different quantitative models that can be used in a medical diagnostic decision support system (MDSS) including parametric methods (linear discriminant analysis or logistic regression), non-parametric models (K nearest neighbor, or kernel density) and several neural network models. The complexity of the diagnostic task is thought to be one of the prime determinants of model selection. Unfortunately, there is no theory available to guide model selection. Practitioners are left to either choose a favorite model or to test a small subset using cross validation methods. This paper illustrates the use of a self-organizing map (SOM) to guide model selection for a breast cancer MDSS. The topological ordering properties of the SOM are used to define targets for an ideal accuracy level similar to a Bayes optimal level. These targets can then be used in model selection, variable reduction, parameter determination, and to assess the adequacy of the clinical measurement system. These ideas are applied to a successful model selection for a real-world breast cancer database. Diagnostic accuracy results are reported for individual models, for ensembles of neural networks, and for stacked predictors. PMID:10998586

West, D; West, V

2000-11-01

408

Design of a New Optical System for Alcator C-Mod Motional Stark Effect Diagnostic  

SciTech Connect

The motional Stark effect (MSE) diagnostic on Alcator C-Mod uses an in-vessel optical system (five lenses and three mirrors) to relay polarized light to an external polarimeter because port access limitations on Alcator C-Mod preclude a direct view of the diagnostic beam. The system experiences unacceptable, spurious drifts of order several degrees in measured pitch angle over the course of a run day. Recent experiments illuminated the MSE diagnostic with polarized light of fixed orientation as heat was applied to various optical elements. A large change in measured angle was observed as two particular lenses were heated, indicating that thermal-stress-induced birefringence is a likely cause of the spurious variability. Several new optical designs have been evaluated to eliminate the affected in-vessel lenses and to replace the focusing they provide with curved mirrors; however, ray tracing calculations imply that this method is not feasible. A new approach is under consideration that utilizes in situ calibrations with in-vessel reference polarized light sources. 2008 American Institute of Physics.

Jinseok Ko, Steve Scott, Manfred Bitter, and Scott Lerner

2009-11-12

409

General Information Processing System: (GIPSY). Application Description.  

National Technical Information Service (NTIS)

The application description is directed to those desiring to acquaint themselves with the characteristics of the General Information Processing System (GIPSY). It provides guidelines and aids for the preparation and use of the system, and covers such area...

C. H. Addison

1969-01-01

410

Vehicle Processing Readiness Course: Aerospace Systems  

NSDL National Science Digital Library

This document from SpaceTEC National Aerospace Technical Education Center presents a vehicle processing readiness course on aerospace systems. It includes materials related to basic flight principles, safety, orbits, propulsion, structure and electromechanical systems.

Fletcher, Bill

2011-06-01

411

Latency Minimizing Tasking for Information Processing Systems.  

National Technical Information Service (NTIS)

Real-time cyber-physical systems and information processing clusters require system designers to consider the total latency involved in collecting and aggregating data. For example, applications such as wild-fire monitoring require data to be presented to...

B. Lagesse J. Horey

2013-01-01

412

GPLS VME MODULE: A DIAGNOSTIC AND DISPLAY TOOL FOR NSLS MICRO SYSTEMS.  

SciTech Connect

The General Purpose Light Source VME module is an integral part of every front-end micro in the NSLS control system. The board incorporates features such as a video character generator, clock signals, time-of-day clock, a VME bus interrupter and general-purpose digital inputs and outputs. This module serves as a valuable diagnostic and real-time display tool for the micro development as well as for the final operational systems. This paper describes the functions provided by the board for the NSLS micro control monitor software.

RAMAMOORTHY,S.; SMITH,J.D.

1999-03-29

413

Minicomputer Controlled Test System for Process Control and Monitoring Systems.  

National Technical Information Service (NTIS)

A minicomputer controlled test system for testing process control and monitoring systems is described. This system, in service for over one year, has demonstrated that computerized control of such testing has a real potential for expanding the scope of th...

L. D. Worster

1975-01-01

414

Semiautomated IMINT processing baseline system  

NASA Astrophysics Data System (ADS)

The objective of the SAIP ACTD is to make imagery a responsive contributing source to a commander's overall battlespace awareness by focusing on theater and tactical sensor exploitation. The goal of the exploitation system is to increase the image analyst efficiency in exploiting large volumes of image data produced by current and future theater and tactical imaging platforms. The system will be evaluated based on its ability to improve the analyst's capability to detect and recognize isolated targets, minimize false alarms, recognize force structure (e.g. maneuver battalions), and provide a closed loop cueing of spot mode from strip imagery.

Gilmore, John F.; Williams, Larry E.

1997-06-01

415

Waste receiving and processing plant control system; system design description  

Microsoft Academic Search

The Plant Control System (PCS) is a heterogeneous computer system composed of numerous sub-systems. The PCS represents every major computer system that is used to support operation of the Waste Receiving and Processing (WRAP) facility. This document, the System Design Description (PCS SDD), includes several chapters and appendices. Each chapter is devoted to a separate PCS sub-system. Typically, each chapter

1999-01-01

416

Relaxation Processes in Magnetic Systems.  

National Technical Information Service (NTIS)

The British Radio-Spectroscopy Group met at the University of Bristol 3-4 September, 1975, to discuss relaxation in magnetic systems. A historical review of early experiments pertaining to 'spin' of electrons and nuclei by Dr. E. E. Schneider of Newcastle...

T. A. Kitchens

1975-01-01

417

Multichannel image processing system for thermal supervision systems  

NASA Astrophysics Data System (ADS)

Foundation principles of multichannel real-time information processing system which is solving a problem of automatic object tracking are considered in this work. Image processing algorithms which are used for three-channel system foundation and optimally approaching for system core-Microprocessor Neuro Matrix NM6403 are realized. Information processing is accomplished with using of Hopfield neural network one 384x288 frame processing time is about 100...140 ms.

Zorin, A. A.; Razumova, I. I.; Tarkov, V. A.

2005-06-01

418

Data Processing System for NBT Experiments.  

National Technical Information Service (NTIS)

Data processing system for Nagoya Bumpy Torus (NBT) has been developed. Since plasmas are produced and heated in steady state by use of high power microwaves, sampling and processing data prevails in long time scale on the order of one minute. The system,...

C. Takahashi M. Hosokawa T. Shoji M. Fujiwara

1981-01-01

419

Signal Processing in WiMAX System  

Microsoft Academic Search

The aim of this work is to describe physical layer digital signal processing in the WiMAX system. A physical layer transfer chain flow chart is drawn and all important aspects of digital signal processing are discussed. For this purpose a transfer chain model in Matlab was made. The results of this work concern the WiMAX system's resistance to disturbance.

M. Skapa; S. Hanus

2007-01-01

420

Understanding Memory: The Systems and Processing Debate  

Microsoft Academic Search

parts of the brain. Researchers have found dissociations between both explicit\\/implicit tasks and perceptual\\/conceptual tasks, proposing many theories to explain these dis- sociations. These theories can be categorized under two general theoretical approaches: the memory systems approach and the processing approach. The neuropsychological tradition favors the memory systems approach while the cognitive psychological tradition favors processing approaches (Roediger, 1990). Although

Austin Che

2001-01-01

421

Integrated system and process for bioproduct production  

US Patent & Trademark Office Database

Processes and systems for production of bioproducts such as biofuels are provided. The bioproduct production processes and systems utilize pretreatment of a carbohydrate-containing feedstock to produce soluble sugar molecules and continuous conversion of the pretreated feedstock to a bioproduct by an immobilized fermenting microorganism.

Walther; David C. (Oakland, CA); Meerman; Hendrik J. (Scotts Valley, CA); Burns-Guydish; Stacy M. (Campbell, CA); Wilson; Richard W. (Palo Alto, CA); Hogg; Eamon T. (Decatur, GA); Luli; Gregory W. (San Diego, CA); Eckert; Robert (Auburn, WA)

2013-07-30

422

The General Information Processing System (Gipsy).  

National Technical Information Service (NTIS)

The paper describes the General Information Processing System, a computer program designed to serve a variety of information processing applications. An input deck to the program is composed of a data base and a description of the processing tasks to be p...

J. D. Cooper

1969-01-01

423

A Diagnostic Assessment of Evolutionary Multiobjective Optimization for Water Resources Systems  

NASA Astrophysics Data System (ADS)

This study contributes a rigorous diagnostic assessment of state-of-the-art multiobjective evolutionary algorithms (MOEAs) and highlights key advances that the water resources field can exploit to better discover the critical tradeoffs constraining our systems. This study provides the most comprehensive diagnostic assessment of MOEAs for water resources to date, exploiting more than 100,000 MOEA runs and trillions of design evaluations. The diagnostic assessment measures the effectiveness, efficiency, reliability, and controllability of ten benchmark MOEAs for a representative suite of water resources applications addressing rainfall-runoff calibration, long-term groundwater monitoring (LTM), and risk-based water supply portfolio planning. The suite of problems encompasses a range of challenging problem properties including (1) many-objective formulations with 4 or more objectives, (2) multi-modality (or false optima), (3) nonlinearity, (4) discreteness, (5) severe constraints, (6) stochastic objectives, and (7) non-separability (also called epistasis). The applications are representative of the dominant problem classes that have shaped the history of MOEAs in water resources and that will be dominant foci in the future. Recommendations are provided for which modern MOEAs should serve as tools and benchmarks in the future water resources literature.

Reed, P.; Hadka, D.; Herman, J.; Kasprzyk, J.; Kollat, J.

2012-04-01

424

Oil recovery process and system  

SciTech Connect

A process is described for producing a partially hydrolyzed polyacrylamide having a preselected average molecular weight and molecular weight distribution for use in recovering oil from a subterranean oil-bearing formation, comprising: predetermining the injectivity and mobility properties of a partially hydrolyzed polyacrylamide required to meet the oil displacement demands of an oil-bearing formation by obtaining a core sample from the formation and subjecting the sample to tests simulating the passage of the partially hydrolyzed polyacrylamide through the formation during oil displacement; forming a solution of a water soluble acrylamide monomer capable of being polymerized; polymerizing the monomer in the presence of a polymerization catalyst. The proportion of catalyst present is regulated during polymerization to provide, an acrylamide polymer having an average molecular weight of about 2 million to about 10 million and a molecular weight distribution of about 0.02 to about 0.22.

Argabright, P.A.; Rhudy, J.S.

1987-08-18

425

Thermal processing systems for TRU mixed waste  

SciTech Connect

This paper presents preliminary ex situ thermal processing system concepts and related processing considerations for remediation of transuranic (TRU)-contaminated wastes (TRUW) buried at the Radioactive Waste Management Complex (RWMC) of the Idaho National Engineering Laboratory (INEL). Anticipated waste stream components and problems are considered. Thermal processing conditions required to obtain a high-integrity, low-leachability glass/ceramic final waste form are considered. Five practical thermal process system designs are compared. Thermal processing of mixed waste and soils with essentially no presorting and using incineration followed by high temperature melting is recommended. Applied research and development necessary for demonstration is also recommended.

Eddy, T.L.; Raivo, B.D.; Anderson, G.L.

1992-08-01

426

Thermal processing systems for TRU mixed waste  

SciTech Connect

This paper presents preliminary ex situ thermal processing system concepts and related processing considerations for remediation of transuranic (TRU)-contaminated wastes (TRUW) buried at the Radioactive Waste Management Complex (RWMC) of the Idaho National Engineering Laboratory (INEL). Anticipated waste stream components and problems are considered. Thermal processing conditions required to obtain a high-integrity, low-leachability glass/ceramic final waste form are considered. Five practical thermal process system designs are compared. Thermal processing of mixed waste and soils with essentially no presorting and using incineration followed by high temperature melting is recommended. Applied research and development necessary for demonstration is also recommended.

Eddy, T.L.; Raivo, B.D.; Anderson, G.L.

1992-01-01

427

Comparison of New and Established Full-Field Digital Mammography Systems in Diagnostic Performance  

PubMed Central

Objective To compare the diagnostic performance of new and established full-field digital mammography (FFDM) systems. Materials and Methods During a 15-month period, 1038 asymptomatic women who visited for mammography were prospectively included from two institutions. For women with routine two-view mammograms from established FFDM systems, bilateral mediolateral oblique (MLO) mammograms were repeated using the new FFDM system. One of the four reviewers evaluated two-sets of bilateral MLO mammograms at 4-week intervals by using a five-point score for the probability of malignancy according to a Breast Imaging Reporting and Data System. The lesion type and breast density were determined by the consensus of two readers at each institution. The dichotomized mammographic results correlated with a final pathologic outcome and follow-up data. Receiver operating characteristic (ROC) curves, sensitivity, and specificity were compared in general and according to the lesion type and breast density. Results Of the 1038 cases, 193 (18.6%) had cancer. The areas under the ROC curve (AUC), sensitivity, and specificity of the established system were 0.815, 65.3%, and 90.2%, respectively. Those of the new system were 0.839, 68.4%, and 91.7%, respectively. There were no significant differences in the AUCs, sensitivities or the specificities in general between new and established systems (Ps = 0.194, 0.590, 0.322, respectively). We found no significant difference in these parameters according to lesion type or breast density. Conclusion The new FFDM system has a comparable diagnostic performance with established systems.

Ko, Eun Sook; Kim, Sun Mi; Ko, Eun Young; Jang, Mijung; Lyou, Chae Yeon; Chang, Jung Min; Moon, Woo Kyung; Kim, Rock Bum

2013-01-01

428

A pixel detector-based single photon-counting system as fast spectrometer for diagnostic X-ray beams.  

PubMed

Recent advances in semiconductor pixel detectors and read-out electronics allowed to build the first prototypes of single photon-counting imaging systems that represent the last frontier of digital radiography. Among the advantages with respect to commercially available digital imaging systems, there are direct conversion of photon energy into electrical charge and the effective rejection of electronic noise by means of a thresholding process. These features allow the photon-counting systems to achieve high imaging performances in terms of spatial and contrast resolution. Moreover, the now available deep integration techniques allow the reduction of the pixel size and the improvement of the functionality of the single cell and the read-out speed so as to cope with the high fluxes found in diagnostic radiology. In particular, the single photon-counting system presented in this paper is based on a 300-microm thick silicon pixel detector bump-bonded to the Medipix2 read-out chip to form an assembly of 256 x 256 square pixels at a pitch of 55 microm. Each cell comprises a low-noise preamplifier, two pulse height discriminators and a 14-bit counter. The maximum counting rate per pixel is 1 MHz. The chip can operate in two modalities: it records the events with energy above a threshold (single mode) or between two energy thresholds (window mode). Exploiting this latter feature, a possible application of such a system as a fast spectrometer is presented to study the energy spectrum of diagnostic beams produced by X-ray tubes. PMID:18487616

Carpentieri, C; Bisogni, M G; Del Guerra, A; Delogu, P; Fantacci, M E; Fogli, J; Marchi, A; Marzulli, V; Rosso, V; Stefanini, A; Tofani, A

2008-05-16

429

COMPREHENSIVE DIAGNOSTIC AND IMPROVEMENT TOOLS FOR HVAC-SYSTEM INSTALLATIONS IN LIGHT COMMERCIAL BUILDINGS  

SciTech Connect

Proctor Engineering Group, Ltd. (PEG) and Carrier-Aeroseal LLP performed an investigation of opportunities for improving air conditioning and heating system performance in existing light commercial buildings. Comprehensive diagnostic and improvement tools were created to address equipment performance parameters (including airflow, refrigerant charge, and economizer operation), duct-system performance (including duct leakage, zonal flows and thermal-energy delivery), and combustion appliance safety within these buildings. This investigation, sponsored by the National Energy Technology Laboratory, a division of the U.S. Department of Energy, involved collaboration between PEG and Aeroseal in order to refine three technologies previously developed for the residential market: (1) an aerosol-based duct sealing technology that allows the ducts to be sealed remotely (i.e., without removing the ceiling tiles), (2) a computer-driven diagnostic and improvement-tracking tool for residential duct installations, and (3) an integrated diagnosis verification and customer satisfaction system utilizing a combined computer/human expert system for HVAC performance. Prior to this work the aerosol-sealing technology was virtually untested in the light commercial sector--mostly because the savings potential and practicality of this or any other type of duct sealing had not been documented. Based upon the field experiences of PEG and Aeroseal, the overall product was tailored to suit the skill sets of typical HVAC-contractor personnel.

Abram Conant; Mark Modera; Joe Pira; John Proctor; Mike Gebbie

2004-10-31

430

A parallel processing system of images  

NASA Astrophysics Data System (ADS)

In order to speedup image processing in embedded environment, we construct a parallel processing system of images. The parallel processing system includes a parallel hardware, a new defined language for parallel image processing and a set of software tools. From the view of high performance, low power dissipation and the characteristics of image processing, we construct a SIMD coprocessor as an image processing accelerator. Using a RISC host processor manages the whole system. The SIMD processor is scalable. We also define a new language which is extended from standard C. A new data type "stream" and a new keyword "kernel" are added to the language to explicitly describe parallelism. For the new hardware and language of parallel image processing, we also research software tools for this parallel system. The software tools maps programs to code that runs on the new hardware. For example develop a scheduler to transfer stream data between memories and register files. From the analysis we found that the parallel image processing system can not only match image applications' characteristics but also easy to implement by using VLSI technology. With new language and software tools supporting, an embedded real-time parallel image processing system becomes available for programmers.

Duan, ZongTao; Zhou, XingShe

2005-11-01

431

Vibration mitigation in J-TEXT far-infrared diagnostic systems  

NASA Astrophysics Data System (ADS)

Optical structure stability is an important issue for far-infrared (FIR) phase measurements. To ensure good signal quality, influence of vibration should be minimized. Mechanical amelioration and optical optimization can be taken in turn to decrease vibration's influence and ensure acceptable measurement. J-TEXT (Joint Texal Experiment Tokamak, formerly TEXT-U) has two FIR diagnostic systems: a HCN interferometer system for electron density measurement and a three-wave polarimeter-interferometer system (POLARIS) for electron density and Faraday effect measurements. All use phase detection techniques. HCN interferometer system has almost eliminated the influence of vibration after mechanical amelioration and optical optimization. POLARIS also obtained first experimental results after mechanical stability improvements and is expected to further reduce vibration's influence on Faraday angle to 0.1° after optical optimization.

Li, Q.; Chen, J.; Zhuang, G.; Wang, Z. J.; Gao, L.; Chen, W.

2012-10-01

432

Vibration mitigation in J-TEXT far-infrared diagnostic systems  

SciTech Connect

Optical structure stability is an important issue for far-infrared (FIR) phase measurements. To ensure good signal quality, influence of vibration should be minimized. Mechanical amelioration and optical optimization can be taken in turn to decrease vibration's influence and ensure acceptable measurement. J-TEXT (Joint Texal Experiment Tokamak, formerly TEXT-U) has two FIR diagnostic systems: a HCN interferometer system for electron density measurement and a three-wave polarimeter-interferometer system (POLARIS) for electron density and Faraday effect measurements. All use phase detection techniques. HCN interferometer system has almost eliminated the influence of vibration after mechanical amelioration and optical optimization. POLARIS also obtained first experimental results after mechanical stability improvements and is expected to further reduce vibration's influence on Faraday angle to 0.1 Degree-Sign after optical optimization.

Li, Q.; Chen, J.; Zhuang, G.; Wang, Z. J.; Gao, L.; Chen, W. [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074 (China)

2012-10-15

433

Using a systems-based approach to overcome reductionist strategies in the development of diagnostics.  

PubMed

Systems biology is a recent addition to the necessary but insufficient reductionist approach used in biological research. Systems biology is focused on understanding living things as a function of their various interactions at multiple levels: not simply as a sum of all their individual parts at any one level. This integrative approach yields predictive models of the normal state, the disease state and therapeutic actions. Although molecular biology has collected an enormous amount of information, including the sequencing of the entire human genome in the year 2000, few real-world applications have resulted from this molecular approach. The pharmaceutical industry's R&D expenditure has increased substantially since 2000, but the number of approved therapeutics has dropped simultaneously, due in part to over-reliance on reductionist genomic, and not systems, approaches. Instead of using reductionist genomics approaches alone, genomics should be incorporated into a multi-level systems biology approach to develop diagnostics and therapeutics. PMID:24138553

Maguire, Greg

2013-10-21

434

SERENITY Aware System Development Process  

NASA Astrophysics Data System (ADS)

Traditionally, security patterns have successfully been used to describe security and dependability. In the SERENITY Project the notion of security and dependability (S&D) pattern has been extended to exact specifications of re-usable security mechanisms for Ambient Intelligence (AmI) systems. These S&D Patterns include information on the security properties satisfied by the solution and on the context conditions to be fulfilled. This chapter presents the development of applications supported by SERENITY. In the context of SERENITY we refer to these applications as Serenity-aware applications. Firstly, this chapter presents the Serenity-aware application design using S&D Artefacts. Secondly, it proposes a Java Application Programming Interface (API) to be used in the application development. And, finally, it introduces the development of an example Serenity-aware application.

Serrano, Daniel; Maña, Antonio; Llarena, Rafael; Crespo, Beatriz Gallego-Nicasio; Li, Keqin

435

Vexcel 3DSAR ground data processing system  

Microsoft Academic Search

Vexcel has developed a ground processing system for ERS, JERS and Radarsat synthetic aperture radar (SAR) data. The system consists of a hardware-based direct-to-disk data downlink capability, and an integrated software system. The software includes generalized frame synchronization, scene framing, and CEOS level zero product generation, as well as SAR single-beam and ScanSAR processing, interferometry, and orthorectification capabilities. All functions

Jim Curlander; Grant Burkhart; Matt Compton; Dennis Flanigan; Henry Frick; Kelly Maurice; Marzban Palsetia; Eugene Yen

1998-01-01

436

Laser-based systems for the structural diagnostic of artwork: an application to XVII-century Byzantine icons  

NASA Astrophysics Data System (ADS)

Laser diagnostic systems based on shearography, vibrometry, and holography principles were employed to investigate the potential implementation of laser techniques in art conservation structural diagnostic field. The employed techniques offered the required measuring variability to allow a first discrimination on complex diagnostic uncertainties encountered often in art conservation. The systems were tested and used to assess the structural condition of well-documented Byzantine icons with known structural problems. Defects and mechanical deformations were identified in various distances from the artworks by alternative employment of techniques. In this way simultaneous eligibility classification of the used systems was also obtained. Results of the on-field application on the XVII century Byzantine icons are herein presented with discussion on the prospects of the techniques in the diagnostic field of art conservation.

Tornari, Vivi; Bonarou, Antonia; Castellini, Paolo; Esposito, Enrico; Osten, Wolfgang; Kalms, Michael K.; Smyrnakis, Nikos; Stasinopulos, Stergios

2001-10-01

437

Acoustic and vibration monitoring systems and its place in the general conception of NPP diagnostics  

SciTech Connect

Concept of diagnostics as a matter is an identification of defects and malfunctions in operating equipment by analyzing some data containing the information about these defects or malfunctions, but received without their direct observation. The direct observation of some parameters may be impossible in principle (for example, coolant saturation temperature), or because of inaccessibility for its measuring (for example, temperature of fuel elements), or because of the absence of a suitable sensor at a proper place. And, on the contrary, in some cases there is too much information for its simple interpretation. This report describes various monitoring systems of reactor components.Application is made to a pwr type reactor.

Dmitriev, V.; Kudryavtsev, B.; Morozov, S.; Finkel, B. [VNIIAES, Moscow (Russian Federation)

1993-12-31

438

Connected Vehicle Diagnostics and Prognostics, Concept, and Initial Practice  

Microsoft Academic Search

We propose a new concept of Connected Vehicle Diagnostics and Prognostics (CVDP) to address some of the challenges in vehicle system fault diagnostics and prognosis, such as the diagnostics of unexpected new faults, and infrequent or intermittent faults. As an initial practice, this concept has been implemented in the vehicle design validation process at GM. This paper presents the implementation

Yilu Zhang; Gary W. Gantt; Mark J. Rychlinski; Ryan M. Edwards; John J. Correia; Calvin E. Wolf

2009-01-01

439

ECOSTATIC CANE PROCESSING SYSTEM PROTOTYPE PHASE  

EPA Science Inventory

The overall objective of this project was to demonstrate a systems environmental management approach, from field to final product, for the processing of raw cane sugar. Specific sub-systems which were to be developed and demonstrated as part of this systems approach were: (a) har...

440

Project, systems and risk management processes interactions  

Microsoft Academic Search

This paper discusses three major concepts: projects, risk, and systems management. Systems and project management consider risk management as an integral part of their processes. Risk management is used to avoid any failure or crisis during their life cycles. Projects have well defined life cycles during which the risk is defined, controlled, and managed. Systems, on the other hand, have

Baqer Alali; Ariel Pinto

2009-01-01

441

Diagnostic System of Mechanical and Electric Equipment Technical Condition of an Electric Drive of the Tapped Roller Bed of Hot Rolling Mill 2000  

Microsoft Academic Search

It was proposed to increase the number of diagnostic functions performed by automatic system of current diagnostics from two up to nine ones. Algorithms of diagnostic functions data and generalized algorithm of operation system of diagnosing technical condition of mechanical and electrical equipment of an electric drive of the tapped roller bed of the rolling mill have been elaborated and

D. V. Shwidchenko; R. S. Pishnograev; K. S. Lazarenko

2005-01-01

442

High Consequence System Surety process description  

SciTech Connect

This report documents work-in-progress accomplished prior to programmatic changes that negated bringing this effort to conclusion as originally intended. The High Consequence System Surety (HCS{sup 2}) project pulls together a multi-disciplinary team to integrate the elements of surety safety, security, control, reliability and quality--into a new, encompassing process. The benefit of using this process is enhanced surety in the design of a high consequence system through an up-front, designed-in approach. This report describes the integrated, high consequence surety process and includes a hypothetical example to illustrate the process.

Randall, G.T. [comp.

1995-09-01

443

RAMI Analyses of Heating Neutral Beam and Diagnostic Neutral Beam Systems for ITER  

SciTech Connect

A RAMI (Reliability, Availability, Maintainability, Inspectability) analysis has been performed for the heating (and current drive) neutral beam (HNB) and diagnostic neutral beam (DNB) systems of the ITER device. The objective of these analyses is to implement RAMI engineering requirements for design and testing to prepare a reliability-centred plan for commissioning, operation, and maintenance of the system in the framework of technical risk control to support the overall ITER Project. These RAMI requirements will correspond to the RAMI targets for the ITER project and the compensating provisions to reach them as deduced from the necessary actions to decrease the risk level of the function failure modes. The RAMI analyses results have to match with the procurement plan of the systems.

Chang, D. H. [Korea Atomic Energy Research Institute(KAERI), Daejeon 305-353 (Korea, Republic of); Lee, S. [ITER-Korea Domestic Agency, National Fusion Research Institute(NFRI), Daejeon 305-333 (Korea, Republic of); Hemsworth, R.; Houtte, D. van; Okayama, K.; Sagot, F.; Schunke, B.; Svensson, L. [ITER Organization, 13067 St. Paul-lez-Durance Cedex (France)

2011-09-26

444

DEVELOPMENT OF A SIMPLE PAVEMENT DIAGNOSTIC SYSTEM USING DYNAMIC RESPONSES OF AN ORDINARY VEHICLE  

NASA Astrophysics Data System (ADS)

Vehicle Intelligent Monitoring System (VIMS), which enables frequent quantitative assessment of road pavement condition, has been developed. The system, which utilizes an ordinary vehicle equipped with an accelerometer, GPS, and portable PC, is simple and inexpensive. VIMS evaluates road roughness by estimating the International Roughness Index (IRI) from the response of the vehicle traveling at a constant speed. At first, the repeatability of the dynamic response measurement is confirmed. Then, an IRI estimation method utilizing vertical responses of the vehicle has been proposed and its accuracy studied. Furthermore, IRI estimation calibration to account for differences in measurement vehicles and driving speeds has been discussed. Finally, VIMS is applied to expressways in Japan and national roads in the Philippines, which confirms the diagnostic capability of the system.

Asakawa, Hiroyuki; Nagayama, Tomonori; Fujino, Yozo; Nishikawa, Takafumi; Akimoto, Takashi; Izumi, Kimihiko

445

[Electronic data processing system for clinical microbiology].  

PubMed

A computerized clinical microbiology data storage and retrieval system, which was introduced at the Institute of Medical Microbiology 14 month ago, is described. This institute has to perform routine diagnostic microbiology for hospitals in the Kanton of Zuerich including the university hospital. In addition, it serves as a public health laboratory for Zuerich and adjacent districts. Patient and physician data are entered into a data station IBM 3741 and stored on discettes. Each afternoon, these data are printed on special report forms, which then are transferred to the diagnostic laboratories. After completion of the investigation, a copy of this form containing the results is sent to the physician. Every two weeks, the information stored on the discettes are converted onto the magnetic tape "discette". In addition, the original report form, containing the codified results and the fees, are read by an optic reader, which transfers the information onto the tape "report". Both tapes then serve the computer to print the accounts as well as to summarize the results monthly in form of the medical statistics. These provide valuable information to enhance patient care. All data are stored in a cumalative microbiology data bank for later retrieval. PMID:936831

Kayser, F H; Schildnecht, J; Munzinger, J; Karasek, J P

1976-05-01

446

Performance evaluation of ExiStation HBV diagnostic system for hepatitis B virus DNA quantitation.  

PubMed

The performance of a recently developed real-time PCR system, the ExiStation HBV diagnostic system, for quantitation of hepatitis B virus (HBV) in human blood was evaluated. The detection limit, reproducibility, cross-reactivity, and interference were evaluated as measures of analytical performance. For the comparison study, 100 HBV-positive blood samples and 100 HBV-negative samples from Korean Blood Bank Serum were used, and the results of the ExiStation HBV system showed good correlation with those obtained using the Cobas TaqMan (r(2)=0.9931) and Abbott real-time PCR systems (r(2)=0.9894). The lower limit of detection was measured as 9.55IU/mL using WHO standards and the dynamic range was linear from 6.68 to 6.68×10(9)IU/mL using cloned plasmids. The within-run coefficient of variation (CV) was 9.4%, 2.1%, and 1.1%, and the total CV was 11.8%, 3.6%, and 1.7% at a concentration of 1.92log10IU/mL, 3.88log10IU/mL, and 6.84log10IU/mL, respectively. No cross-reactivity or interference was detected. The ExiStation HBV diagnostic system showed satisfactory analytical sensitivity, excellent reproducibility, no cross-reactivity, no interference, and high agreement with the Cobas TaqMan and Abbott real-time PCR systems, and is therefore a useful tool for the detection and monitoring of HBV infection. PMID:23892129

Cha, Young Joo; Yoo, Soo Jin; Sohn, Yong-Hak; Kim, Hyun Soo

2013-07-25

447

The role of patient involvement in the diagnostic process in internal medicine: a cognitive approach.  

PubMed

Much cognitive and clinical research has addressed clinical reasoning, pointing out that physicians often have difficulties in following a linear course when making accurate diagnoses. Some authors suspect that physicians make mistakes because they unknowingly fail to observe the laws of formal logic and that their reasoning becomes influenced by contextual factors. In this paper, we introduce some basic principles of the cognitive approach to medical decision making and we describe the cognitive balanced model. Then we discuss the relationship between construction of mental models, cognitive biases and patient involvement by the use of a clinical vignette. Medical decisions may be considered fundamentally biased since the use of judgment heuristics and a combination of cognitive-related and system-related factors limit physicians' rationality. While traditional understanding of clinical reasoning has failed to consider contextual factors, most techniques designed to avoid biases seem to fail in promoting sound and safer medical practice. In particular, we argue that an unbiased process requires the use of a cognitive balanced model, in which analytical and intuitive mind skills should be properly integrated. In order to improve medical decision making and thereby lessen incidence of adverse events, it is fundamental to include the patient perspective in a balanced model. Physicians and patients should improve their collective intelligence by sharing mental models within a framework of distributed intelligence. PMID:23422865

Lucchiari, Claudio; Pravettoni, Gabriella

2013-02-17

448

Visualization of dynamic processes: function-based displays for human-intelligent system interaction  

Microsoft Academic Search

The authors describe the development of an integrated function-based visualization as part of a tool set for enhanced cooperation between artificial-intelligence-based systems and their human partners. The domain of interest for this work is aerospace fault management, where a dynamic process is monitored for anomalous conditions by a joint cognitive system consisting of human operators and intelligent diagnostic systems. The

Scott S. Potter; David D. Woods; Tim Hill; Roger L. Boyer; William S. Morris

1992-01-01

449

MTX (Microwave Tokamak Experiment) diagnostics and timing system for FEL (Free Electron Laser) heating experiments  

NASA Astrophysics Data System (ADS)

In the MTX program, we are concentrating on experiments using intense, FEL-generated microwave pulses. In initial FEL experiments, several diagnostic instruments were operated during injection of microwave pulses with peak powers to 0.2 GW at durations of 10 nsec. Fixed and spatially scanning microwave detectors and receivers and a 48-element calorimeter on the inside wall of MTX diagnosed the GW-level FEL microwave pulses to study linear wave absorption and to determine efficiencies of transmission through the quasi-optical transport system. In addition, several radially resolved measurements of plasma density, temperature, and emission were made during FEL injection and used in the analysis of microwave absorption data. A timing system, slaved to the FEL pulse arrival time is capable of accuracy to a few nanoseconds in order to allow measurement of heating effects on the time scale of a single FEL pulse. We will discuss operation of these diagnostics and our plans for future measurements of single pulse and high average power heating experiments.

Casper, T. A.; Allen, S.; Foote, J.; Fenstermacher, M.; Hooper, E.; Lasnier, C.; Meyer, W. H.; Moller, J. M.; Nilson, D.; Rice, B.

450

MTX (Microwave Tokamak Experiment) diagnostics and timing system for FEL (free electron laser) heating experiments  

SciTech Connect

In the MTX program, we are concentrating on experiments using intense, FEL-generated microwave pulses. In initial FEL experiments, several diagnostic instruments were operated during injection of microwave pulses with peak powers to 0.2 GW at durations of 10 nsec. Fixed and spatially scanning microwave detectors and receivers and a 48-element calorimeter on the inside wall of MTX diagnosed the GW-level FEL microwave pulses to study linear wave absorption and to determine efficiencies of transmission through the quasi-optical transport system. In addition, several radially resolved measurements of plasma density, temperature, and emission were made during FEL injection and used in the analysis of microwave absorption data. A timing system, slaved to the FEL pulse arrival time is capable of accuracy to a few nanoseconds in order to allow measurement of heating effects on the time scale of a single FEL pulse. We will discuss operation of these diagnostics and our plans for future measurements of single pulse and high average power heating experiments. 6 refs., 5 figs.

Casper, T.; Allen, S.; Foote, J.; Fenstermacher, M.; Hooper, E.; Lasnier, C.; Meyer, W.; Moller, J.; Nilson, D.; Rice, B.; Sewall, N.; Stallard, B.; Stever, R.; Thomassen, K.; Wood, R. (Lawrence Livermore National Lab., CA (USA)); Hoshino, K.; Oasa, K.; Ogawa, T. (Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)); Makowski, M. (TRW, Inc., Redondo Beach, CA (USA))

1990-01-01

451

Design and realization of fault diagnostic system for trunking base station based on LabVIEW and Visual Basic  

Microsoft Academic Search

Trunking communication system is a sort of specialized command and control system. It is widely used in rescue work and public safety emergency. The peculiar occasion of its application requires more efficient fault diagnostic system. The rapid development of virtual instrument provides a new approach to the fault diagnosis of communication equipment. In this paper, the construction and the realization

Yongjun Gu; Liu Liu; Zhiyong Shi; Chao Zhang

2010-01-01

452

Multiphoton Processes in Systems of Rydberg Atoms.  

National Technical Information Service (NTIS)

Multiphoton nonlinear effects and Raman processes of Rydberg systems (Rydberg atom gas or Rydberg matter) by intense laser fields are considered. Some experiments and basic elements of quantum theory of Rydberg matter are briefly reviewed. A correlation b...

E. A. Manykin

2002-01-01

453

Organisation Processes Monitoring: Business Intelligence Systems Role  

Microsoft Academic Search

The purpose of this paper is to analyze if Business Intelligence Systems (BISs) can facilitate the monitoring of the uncertainty\\u000a inherent in the organisation processes and consequently contribute to achieve its performance objectives.

C. Rossignoli; A. Ferrari

454

Digital Data Processing System Dynamic Loading Analysis.  

National Technical Information Service (NTIS)

Simulation and analysis of the Space Shuttle Orbiter Digital Data Processing System (DDPS) are reported. The mated flight and postseparation flight phases of the space shuttle's approach and landing test configuration were modeled utilizing the Informatio...

J. J. Lagas J. J. Peterka A. E. Tucker

1976-01-01

455

Process pump selection - A systems approach  

SciTech Connect

An engineer employed in the process industries faced with responsibilities for the specification, selection and purchase of process equipment has a daunting task. With some plant and equipment there are natural specifications to aid the engineer. Not so for process machinery in general, and for pumps in particular. There are no published design guides to help chart the way through the complex process of specifying the pump requirements. This publication represents the distilled experience of a team of engineers working in the industry for more than twenty years. It is a classic example of experiential learning, where experience with hundreds of pumping installations has been categorized, analysed and the essential lessons extracted. Topics considered include the decision making process for the specification, selection and integration of pump into process systems; positive displacement pumps: reciprocating metering; reciprocating special pumps and rotary pumps; centrifugal pumps: general and special purpose, special purpose multistage; sealing considerations; and pump and system combined.

Davidson, J.

1986-01-01

456

Materials and processes for microelectronic systems  

SciTech Connect

This volume contains a collection of papers that were presented at the International Symposium on Materials and Processes for Microelectronic Systems during the First International Ceramic Science and Technology Congress held in Anaheim, California, October 31 to November 3, 1989. The major topics of the symposium were: Dielectric Compositions; Multilayer Capacitor Systems; Glass Ceramic Composite Materials and Processing Concepts; Multilayer Interconnect Packages; Thick and Thin Film Hybrids and Wafer Scale Integration; and Device Fabrications.

Nair, K.M. (E.I. du Pont de Nemours and Company, Inc. (US)); Pohanka, R. (US Department of Navy, Office Naval Research (US)); Buchanan, R.C. (University of Illinois (US))

1990-01-01